diff options
Diffstat (limited to 'xlators/performance')
26 files changed, 8190 insertions, 0 deletions
diff --git a/xlators/performance/Makefile.am b/xlators/performance/Makefile.am new file mode 100644 index 00000000000..f7504bbe8f3 --- /dev/null +++ b/xlators/performance/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = write-behind read-ahead io-threads io-cache symlink-cache + +CLEANFILES = diff --git a/xlators/performance/io-cache/Makefile.am b/xlators/performance/io-cache/Makefile.am new file mode 100644 index 00000000000..d471a3f9243 --- /dev/null +++ b/xlators/performance/io-cache/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = src + +CLEANFILES = diff --git a/xlators/performance/io-cache/src/Makefile.am b/xlators/performance/io-cache/src/Makefile.am new file mode 100644 index 00000000000..b1bf5bfbf71 --- /dev/null +++ b/xlators/performance/io-cache/src/Makefile.am @@ -0,0 +1,14 @@ +xlator_LTLIBRARIES = io-cache.la +xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance + +io_cache_la_LDFLAGS = -module -avoidversion + +io_cache_la_SOURCES = io-cache.c page.c ioc-inode.c +io_cache_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la + +noinst_HEADERS = io-cache.h + +AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS) \ + -I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS) + +CLEANFILES = diff --git a/xlators/performance/io-cache/src/io-cache.c b/xlators/performance/io-cache/src/io-cache.c new file mode 100644 index 00000000000..f367cdb88de --- /dev/null +++ b/xlators/performance/io-cache/src/io-cache.c @@ -0,0 +1,1478 @@ +/* + Copyright (c) 2007, 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "io-cache.h" +#include <assert.h> +#include <sys/time.h> + +static uint32_t +ioc_get_priority (ioc_table_t *table, + const char *path); + +static uint32_t +ioc_get_priority (ioc_table_t *table, + const char *path); + +static inline ioc_inode_t * +ioc_inode_reupdate (ioc_inode_t *ioc_inode) +{ + ioc_table_t *table = ioc_inode->table; + + list_add_tail (&ioc_inode->inode_lru, + &table->inode_lru[ioc_inode->weight]); + + return ioc_inode; +} + +static inline ioc_inode_t * +ioc_get_inode (dict_t *dict, + char *name) +{ + ioc_inode_t *ioc_inode = NULL; + data_t *ioc_inode_data = dict_get (dict, name); + ioc_table_t *table = NULL; + + if (ioc_inode_data) { + ioc_inode = data_to_ptr (ioc_inode_data); + table = ioc_inode->table; + + ioc_table_lock (table); + { + if (list_empty (&ioc_inode->inode_lru)) { + ioc_inode = ioc_inode_reupdate (ioc_inode); + } + } + ioc_table_unlock (table); + } + + return ioc_inode; +} + +int32_t +ioc_inode_need_revalidate (ioc_inode_t *ioc_inode) +{ + int8_t need_revalidate = 0; + struct timeval tv = {0,}; + int32_t ret = -1; + ioc_table_t *table = ioc_inode->table; + + ret = gettimeofday (&tv, NULL); + + if (time_elapsed (&tv, &ioc_inode->tv) >= table->cache_timeout) + need_revalidate = 1; + + return need_revalidate; +} + +/* + * __ioc_inode_flush - flush all the cached pages of the given inode + * + * @ioc_inode: + * + * assumes lock is held + */ +int32_t +__ioc_inode_flush (ioc_inode_t *ioc_inode) +{ + ioc_page_t *curr = NULL, *next = NULL; + int32_t destroy_size = 0; + int32_t ret = 0; + + list_for_each_entry_safe (curr, next, &ioc_inode->pages, pages) { + ret = ioc_page_destroy (curr); + + if (ret != -1) + destroy_size += ret; + } + + return destroy_size; +} + +void +ioc_inode_flush (ioc_inode_t *ioc_inode) +{ + int32_t destroy_size = 0; + + ioc_inode_lock (ioc_inode); + { + destroy_size = __ioc_inode_flush (ioc_inode); + } + ioc_inode_unlock (ioc_inode); + + if (destroy_size) { + ioc_table_lock (ioc_inode->table); + { + ioc_inode->table->cache_used -= destroy_size; + } + ioc_table_unlock (ioc_inode->table); + } + + return; +} + +/* + * ioc_utimens_cbk - + * + * @frame: + * @cookie: + * @this: + * @op_ret: + * @op_errno: + * @stbuf: + * + */ +int32_t +ioc_utimens_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *stbuf) +{ + STACK_UNWIND (frame, op_ret, op_errno, stbuf); + return 0; +} + +/* + * ioc_utimens - + * + * @frame: + * @this: + * @loc: + * @tv: + * + */ +int32_t +ioc_utimens (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + struct timespec *tv) +{ + uint64_t ioc_inode = 0; + inode_ctx_get (loc->inode, this, &ioc_inode); + + if (ioc_inode) + ioc_inode_flush ((ioc_inode_t *)(long)ioc_inode); + + STACK_WIND (frame, ioc_utimens_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->utimens, + loc, tv); + return 0; +} + +int32_t +ioc_lookup_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + inode_t *inode, + struct stat *stbuf, + dict_t *dict) +{ + ioc_inode_t *ioc_inode = NULL; + ioc_local_t *local = frame->local; + ioc_table_t *table = this->private; + ioc_page_t *page = NULL; + data_t *page_data = NULL; + data_t *content_data = NULL; + char *src = NULL; + char *dst = NULL; + char need_unref = 0; + uint8_t cache_still_valid = 0; + uint32_t weight = 0; + uint64_t tmp_ioc_inode = 0; + char *buf = NULL; + char *tmp = NULL; + int i; + + if (op_ret != 0) + goto out; + + inode_ctx_get (inode, this, &tmp_ioc_inode); + ioc_inode = (ioc_inode_t *)(long)tmp_ioc_inode; + if (ioc_inode) { + cache_still_valid = ioc_cache_still_valid (ioc_inode, + stbuf); + + if (!cache_still_valid) { + ioc_inode_flush (ioc_inode); + } + /* update the time-stamp of revalidation */ + ioc_inode_lock (ioc_inode); + { + gettimeofday (&ioc_inode->tv, NULL); + } + ioc_inode_unlock (ioc_inode); + + ioc_table_lock (ioc_inode->table); + { + list_move_tail (&ioc_inode->inode_lru, + &table->inode_lru[ioc_inode->weight]); + } + ioc_table_unlock (ioc_inode->table); + } + + if (local && stbuf->st_size && + local->need_xattr >= stbuf->st_size) { + if (!ioc_inode) { + weight = ioc_get_priority (table, + local->file_loc.path); + ioc_inode = ioc_inode_update (table, + inode, weight); + inode_ctx_put (inode, this, + (uint64_t)(long)ioc_inode); + } + + ioc_inode_lock (ioc_inode); + { + content_data = dict_get (dict, "glusterfs.content"); + page = ioc_page_get (ioc_inode, 0); + + if (content_data) { + if (page) { + dict_unref (page->ref); + free (page->vector); + page->vector = NULL; + + ioc_table_lock (table); + { + table->cache_used -= + page->size; + } + ioc_table_unlock (table); + } else { + page = ioc_page_create (ioc_inode, 0); + } + + dst = CALLOC (1, stbuf->st_size); + page->ref = dict_ref (get_new_dict ()); + page_data = data_from_dynptr (dst, + stbuf->st_size); + dict_set (page->ref, NULL, page_data); + + src = data_to_ptr (content_data); + memcpy (dst, src, stbuf->st_size); + + page->vector = CALLOC (1, + sizeof (*page->vector)); + page->vector->iov_base = dst; + page->vector->iov_len = stbuf->st_size; + page->count = 1; + + page->waitq = NULL; + page->size = stbuf->st_size; + page->ready = 1; + + ioc_table_lock (table); + { + table->cache_used += page->size; + } + ioc_table_unlock (table); + + } else { + if (!(page && page->ready)) { + gf_log (this->name, GF_LOG_DEBUG, + "page not present"); + + ioc_inode_unlock (ioc_inode); + STACK_WIND (frame, + ioc_lookup_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->lookup, + &local->file_loc, + local->xattr_req); + return 0; + } + buf = CALLOC (1, stbuf->st_size); + tmp = buf; + + for (i = 0; i < page->count; i++) { + memcpy (tmp, page->vector[i].iov_base, + page->vector[i].iov_len); + tmp += page->vector[i].iov_len; + } + + gf_log (this->name, GF_LOG_DEBUG, + "serving file %s from cache", + local->file_loc.path); + + if (!dict) { + need_unref = 1; + dict = dict_ref ( + get_new_dict ()); + } + dict_set (dict, "glusterfs.content", + data_from_dynptr (buf, + stbuf->st_size)); + } + + ioc_inode->mtime = stbuf->st_mtime; + gettimeofday (&ioc_inode->tv, NULL); + } + ioc_inode_unlock (ioc_inode); + + if (content_data && + ioc_need_prune (ioc_inode->table)) { + ioc_prune (ioc_inode->table); + } + } + + out: + STACK_UNWIND (frame, op_ret, op_errno, inode, stbuf, dict); + + if (need_unref) { + dict_unref (dict); + } + + return 0; +} + +int32_t +ioc_lookup (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + dict_t *xattr_req) +{ + uint64_t content_limit = 0; + + if (GF_FILE_CONTENT_REQUESTED(xattr_req, &content_limit)) { + uint64_t tmp_ioc_inode = 0; + ioc_inode_t *ioc_inode = NULL; + ioc_page_t *page = NULL; + ioc_local_t *local = CALLOC (1, sizeof (*local)); + + local->need_xattr = content_limit; + local->file_loc.path = loc->path; + local->file_loc.inode = loc->inode; + frame->local = local; + + inode_ctx_get (loc->inode, this, &tmp_ioc_inode); + ioc_inode = (ioc_inode_t *)(long)tmp_ioc_inode; + + if (ioc_inode) { + ioc_inode_lock (ioc_inode); + { + page = ioc_page_get (ioc_inode, 0); + if ((content_limit <= + ioc_inode->table->page_size) && + page && page->ready) { + local->need_xattr = -1; + } + } + ioc_inode_unlock (ioc_inode); + } + } + + STACK_WIND (frame, + ioc_lookup_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->lookup, + loc, + xattr_req); + return 0; +} + +/* + * ioc_forget - + * + * @frame: + * @this: + * @inode: + * + */ +int32_t +ioc_forget (xlator_t *this, + inode_t *inode) +{ + uint64_t ioc_inode = 0; + + inode_ctx_get (inode, this, &ioc_inode); + + if (ioc_inode) + ioc_inode_destroy ((ioc_inode_t *)(long)ioc_inode); + + return 0; +} + + +/* + * ioc_cache_validate_cbk - + * + * @frame: + * @cookie: + * @this: + * @op_ret: + * @op_errno: + * @buf + * + */ +int32_t +ioc_cache_validate_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *stbuf) +{ + ioc_local_t *local = frame->local; + ioc_inode_t *ioc_inode = NULL; + size_t destroy_size = 0; + struct stat *local_stbuf = stbuf; + + ioc_inode = local->inode; + + if ((op_ret == -1) || + ((op_ret >= 0) && !ioc_cache_still_valid(ioc_inode, stbuf))) { + gf_log (ioc_inode->table->xl->name, GF_LOG_DEBUG, + "cache for inode(%p) is invalid. flushing all pages", + ioc_inode); + /* NOTE: only pages with no waiting frames are flushed by + * ioc_inode_flush. page_fault will be generated for all + * the pages which have waiting frames by ioc_inode_wakeup() + */ + ioc_inode_lock (ioc_inode); + { + destroy_size = __ioc_inode_flush (ioc_inode); + if (op_ret >= 0) + ioc_inode->mtime = stbuf->st_mtime; + } + ioc_inode_unlock (ioc_inode); + local_stbuf = NULL; + } + + if (destroy_size) { + ioc_table_lock (ioc_inode->table); + { + ioc_inode->table->cache_used -= destroy_size; + } + ioc_table_unlock (ioc_inode->table); + } + + if (op_ret < 0) + local_stbuf = NULL; + + ioc_inode_lock (ioc_inode); + { + gettimeofday (&ioc_inode->tv, NULL); + } + ioc_inode_unlock (ioc_inode); + + ioc_inode_wakeup (frame, ioc_inode, local_stbuf); + + /* any page-fault initiated by ioc_inode_wakeup() will have its own + * fd_ref on fd, safe to unref validate frame's private copy + */ + fd_unref (local->fd); + + STACK_DESTROY (frame->root); + + return 0; +} + +static int32_t +ioc_wait_on_inode (ioc_inode_t *ioc_inode, + ioc_page_t *page) +{ + ioc_waitq_t *waiter = NULL, *trav = NULL; + uint32_t page_found = 0; + + trav = ioc_inode->waitq; + + while (trav) { + if (trav->data == page) { + page_found = 1; + break; + } + trav = trav->next; + } + + if (!page_found) { + waiter = CALLOC (1, sizeof (ioc_waitq_t)); + ERR_ABORT (waiter); + waiter->data = page; + waiter->next = ioc_inode->waitq; + ioc_inode->waitq = waiter; + } + + return 0; +} + +/* + * ioc_cache_validate - + * + * @frame: + * @ioc_inode: + * @fd: + * + */ +static int32_t +ioc_cache_validate (call_frame_t *frame, + ioc_inode_t *ioc_inode, + fd_t *fd, + ioc_page_t *page) +{ + call_frame_t *validate_frame = NULL; + ioc_local_t *validate_local = NULL; + + validate_local = CALLOC (1, sizeof (ioc_local_t)); + ERR_ABORT (validate_local); + validate_frame = copy_frame (frame); + validate_local->fd = fd_ref (fd); + validate_local->inode = ioc_inode; + validate_frame->local = validate_local; + + STACK_WIND (validate_frame, + ioc_cache_validate_cbk, + FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->fstat, + fd); + + return 0; +} + +static inline uint32_t +is_match (const char *path, + const char *pattern) +{ + char *pathname = strdup (path); + int32_t ret = 0; + + ret = fnmatch (pattern, path, FNM_NOESCAPE); + + free (pathname); + + return (ret == 0); +} + +static uint32_t +ioc_get_priority (ioc_table_t *table, + const char *path) +{ + uint32_t priority = 0; + struct ioc_priority *curr = NULL; + + list_for_each_entry (curr, &table->priority_list, list) { + if (is_match (path, curr->pattern)) + priority = curr->priority; + } + + return priority; +} + +/* + * ioc_open_cbk - open callback for io cache + * + * @frame: call frame + * @cookie: + * @this: + * @op_ret: + * @op_errno: + * @fd: + * + */ +int32_t +ioc_open_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd) +{ + uint64_t tmp_ioc_inode = 0; + ioc_local_t *local = frame->local; + ioc_table_t *table = this->private; + ioc_inode_t *ioc_inode = NULL; + inode_t *inode = local->file_loc.inode; + uint32_t weight = 0; + const char *path = local->file_loc.path; + + if (op_ret != -1) { + /* look for ioc_inode corresponding to this fd */ + LOCK (&fd->inode->lock); + //{ + + inode_ctx_get (fd->inode, this, &tmp_ioc_inode); + ioc_inode = (ioc_inode_t *)(long)tmp_ioc_inode; + + if (!ioc_inode) { + /* this is the first time someone is opening this + file, assign weight + */ + weight = ioc_get_priority (table, path); + + ioc_inode = ioc_inode_update (table, inode, weight); + inode_ctx_put (fd->inode, this, + (uint64_t)(long)ioc_inode); + } else { + ioc_table_lock (ioc_inode->table); + //{ + list_move_tail (&ioc_inode->inode_lru, + &table->inode_lru[ioc_inode->weight]); + //} + ioc_table_unlock (ioc_inode->table); + } + + //} + UNLOCK (&fd->inode->lock); + + /* If mandatory locking has been enabled on this file, + we disable caching on it */ + if (((inode->st_mode & S_ISGID) && + !(inode->st_mode & S_IXGRP))) { + fd_ctx_set (fd, this, 1); + } + + /* If O_DIRECT open, we disable caching on it */ + if ((local->flags & O_DIRECT)){ + /* O_DIRECT is only for one fd, not the inode + * as a whole + */ + fd_ctx_set (fd, this, 1); + } + } + + FREE (local); + frame->local = NULL; + + STACK_UNWIND (frame, op_ret, op_errno, fd); + + return 0; +} + +/* + * ioc_create_cbk - create callback for io cache + * + * @frame: call frame + * @cookie: + * @this: + * @op_ret: + * @op_errno: + * @fd: + * @inode: + * @buf: + * + */ +int32_t +ioc_create_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd, + inode_t *inode, + struct stat *buf) +{ + ioc_local_t *local = frame->local; + ioc_table_t *table = this->private; + ioc_inode_t *ioc_inode = NULL; + uint32_t weight = 0; + const char *path = local->file_loc.path; + + if (op_ret != -1) { + { + /* assign weight */ + weight = ioc_get_priority (table, path); + + ioc_inode = ioc_inode_update (table, inode, weight); + LOCK (&fd->inode->lock); + { + inode_ctx_put (fd->inode, this, + (uint64_t)(long)ioc_inode); + } + UNLOCK (&fd->inode->lock); + } + /* If mandatory locking has been enabled on this file, + we disable caching on it */ + if ((inode->st_mode & S_ISGID) && + !(inode->st_mode & S_IXGRP)) { + fd_ctx_set (fd, this, 1); + } + + /* If O_DIRECT open, we disable caching on it */ + if (local->flags & O_DIRECT){ + /* O_DIRECT is only for one fd, not the inode + * as a whole + */ + fd_ctx_set (fd, this, 1); + } + + } + + frame->local = NULL; + FREE (local); + + STACK_UNWIND (frame, op_ret, op_errno, fd, inode, buf); + + return 0; +} + +/* + * ioc_open - open fop for io cache + * @frame: + * @this: + * @loc: + * @flags: + * + */ +int32_t +ioc_open (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags, + fd_t *fd) +{ + + ioc_local_t *local = CALLOC (1, sizeof (ioc_local_t)); + ERR_ABORT (local); + + local->flags = flags; + local->file_loc.path = loc->path; + local->file_loc.inode = loc->inode; + + frame->local = local; + + STACK_WIND (frame, + ioc_open_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->open, + loc, + flags, + fd); + + return 0; +} + +/* + * ioc_create - create fop for io cache + * + * @frame: + * @this: + * @pathname: + * @flags: + * @mode: + * + */ +int32_t +ioc_create (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags, + mode_t mode, + fd_t *fd) +{ + ioc_local_t *local = CALLOC (1, sizeof (ioc_local_t)); + ERR_ABORT (local); + + local->flags = flags; + local->file_loc.path = loc->path; + frame->local = local; + + STACK_WIND (frame, ioc_create_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->create, + loc, flags, mode, fd); + return 0; +} + + + + +/* + * ioc_release - release fop for io cache + * + * @frame: + * @this: + * @fd: + * + */ +int32_t +ioc_release (xlator_t *this, + fd_t *fd) +{ + return 0; +} + +/* + * ioc_readv_disabled_cbk + * @frame: + * @cookie: + * @this: + * @op_ret: + * @op_errno: + * @vector: + * @count: + * + */ +int32_t +ioc_readv_disabled_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct iovec *vector, + int32_t count, + struct stat *stbuf) +{ + STACK_UNWIND (frame, op_ret, op_errno, vector, count, stbuf); + return 0; +} + + +int32_t +ioc_need_prune (ioc_table_t *table) +{ + int64_t cache_difference = 0; + + ioc_table_lock (table); + { + cache_difference = table->cache_used - table->cache_size; + } + ioc_table_unlock (table); + + if (cache_difference > 0) + return 1; + else + return 0; +} + +/* + * dispatch_requests - + * + * @frame: + * @inode: + * + * + */ +static void +dispatch_requests (call_frame_t *frame, + ioc_inode_t *ioc_inode, + fd_t *fd, + off_t offset, + size_t size) +{ + ioc_local_t *local = frame->local; + ioc_table_t *table = ioc_inode->table; + ioc_page_t *trav = NULL; + ioc_waitq_t *waitq = NULL; + off_t rounded_offset = 0; + off_t rounded_end = 0; + off_t trav_offset = 0; + int32_t fault = 0; + int8_t need_validate = 0; + int8_t might_need_validate = 0; /* if a page exists, do we need + to validate it? */ + + rounded_offset = floor (offset, table->page_size); + rounded_end = roof (offset + size, table->page_size); + trav_offset = rounded_offset; + + /* once a frame does read, it should be waiting on something */ + local->wait_count++; + + /* Requested region can fall in three different pages, + * 1. Ready - region is already in cache, we just have to serve it. + * 2. In-transit - page fault has been generated on this page, we need + * to wait till the page is ready + * 3. Fault - page is not in cache, we have to generate a page fault + */ + + might_need_validate = ioc_inode_need_revalidate (ioc_inode); + + while (trav_offset < rounded_end) { + size_t trav_size = 0; + off_t local_offset = 0; + + ioc_inode_lock (ioc_inode); + //{ + + /* look for requested region in the cache */ + trav = ioc_page_get (ioc_inode, trav_offset); + + local_offset = max (trav_offset, offset); + trav_size = min (((offset+size) - local_offset), + table->page_size); + + if (!trav) { + /* page not in cache, we need to generate page fault */ + trav = ioc_page_create (ioc_inode, trav_offset); + fault = 1; + if (!trav) { + gf_log (frame->this->name, GF_LOG_CRITICAL, + "ioc_page_create returned NULL"); + } + } + + ioc_wait_on_page (trav, frame, local_offset, trav_size); + + if (trav->ready) { + /* page found in cache */ + if (!might_need_validate) { + /* fresh enough */ + gf_log (frame->this->name, GF_LOG_DEBUG, + "cache hit for trav_offset=%"PRId64"" + "/local_offset=%"PRId64"", + trav_offset, local_offset); + waitq = ioc_page_wakeup (trav); + } else { + /* if waitq already exists, fstat revalidate is + already on the way */ + if (!ioc_inode->waitq) { + need_validate = 1; + } + ioc_wait_on_inode (ioc_inode, trav); + } + } + + //} + ioc_inode_unlock (ioc_inode); + + ioc_waitq_return (waitq); + waitq = NULL; + + if (fault) { + fault = 0; + /* new page created, increase the table->cache_used */ + ioc_page_fault (ioc_inode, frame, fd, trav_offset); + } + + if (need_validate) { + need_validate = 0; + gf_log (frame->this->name, GF_LOG_DEBUG, + "sending validate request for " + "inode(%"PRId64") at offset=%"PRId64"", + fd->inode->ino, trav_offset); + ioc_cache_validate (frame, ioc_inode, fd, trav); + } + + trav_offset += table->page_size; + } + + ioc_frame_return (frame); + + if (ioc_need_prune (ioc_inode->table)) { + ioc_prune (ioc_inode->table); + } + + return; +} + + +/* + * ioc_readv - + * + * @frame: + * @this: + * @fd: + * @size: + * @offset: + * + */ +int32_t +ioc_readv (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + size_t size, + off_t offset) +{ + uint64_t tmp_ioc_inode = 0; + ioc_inode_t *ioc_inode = NULL; + ioc_local_t *local = NULL; + uint32_t weight = 0; + + inode_ctx_get (fd->inode, this, &tmp_ioc_inode); + ioc_inode = (ioc_inode_t *)(long)tmp_ioc_inode; + if (!ioc_inode) { + /* caching disabled, go ahead with normal readv */ + STACK_WIND (frame, + ioc_readv_disabled_cbk, + FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->readv, + fd, + size, + offset); + return 0; + } + + if (!fd_ctx_get (fd, this, NULL)) { + /* disable caching for this fd, go ahead with normal readv */ + STACK_WIND (frame, + ioc_readv_disabled_cbk, + FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->readv, + fd, + size, + offset); + return 0; + } + + local = (ioc_local_t *) CALLOC (1, sizeof (ioc_local_t)); + ERR_ABORT (local); + INIT_LIST_HEAD (&local->fill_list); + + frame->local = local; + local->pending_offset = offset; + local->pending_size = size; + local->offset = offset; + local->size = size; + local->inode = ioc_inode; + + gf_log (this->name, GF_LOG_DEBUG, + "NEW REQ (%p) offset = %"PRId64" && size = %"GF_PRI_SIZET"", + frame, offset, size); + + weight = ioc_inode->weight; + + ioc_table_lock (ioc_inode->table); + { + list_move_tail (&ioc_inode->inode_lru, + &ioc_inode->table->inode_lru[weight]); + } + ioc_table_unlock (ioc_inode->table); + + dispatch_requests (frame, ioc_inode, fd, offset, size); + + return 0; +} + +/* + * ioc_writev_cbk - + * + * @frame: + * @cookie: + * @this: + * @op_ret: + * @op_errno: + * + */ +int32_t +ioc_writev_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *stbuf) +{ + ioc_local_t *local = frame->local; + uint64_t ioc_inode = 0; + + inode_ctx_get (local->fd->inode, this, &ioc_inode); + + if (ioc_inode) + ioc_inode_flush ((ioc_inode_t *)(long)ioc_inode); + + STACK_UNWIND (frame, op_ret, op_errno, stbuf); + return 0; +} + +/* + * ioc_writev + * + * @frame: + * @this: + * @fd: + * @vector: + * @count: + * @offset: + * + */ +int32_t +ioc_writev (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + struct iovec *vector, + int32_t count, + off_t offset) +{ + ioc_local_t *local = NULL; + uint64_t ioc_inode = 0; + + local = CALLOC (1, sizeof (ioc_local_t)); + ERR_ABORT (local); + + /* TODO: why is it not fd_ref'ed */ + local->fd = fd; + frame->local = local; + + inode_ctx_get (fd->inode, this, &ioc_inode); + if (ioc_inode) + ioc_inode_flush ((ioc_inode_t *)(long)ioc_inode); + + STACK_WIND (frame, + ioc_writev_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->writev, + fd, + vector, + count, + offset); + + return 0; +} + +/* + * ioc_truncate_cbk - + * + * @frame: + * @cookie: + * @this: + * @op_ret: + * @op_errno: + * @buf: + * + */ +int32_t +ioc_truncate_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +/* + * ioc_truncate - + * + * @frame: + * @this: + * @loc: + * @offset: + * + */ +int32_t +ioc_truncate (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + off_t offset) +{ + uint64_t ioc_inode = 0; + inode_ctx_get (loc->inode, this, &ioc_inode); + + if (ioc_inode) + ioc_inode_flush ((ioc_inode_t *)(long)ioc_inode); + + STACK_WIND (frame, + ioc_truncate_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->truncate, + loc, + offset); + return 0; +} + +/* + * ioc_ftruncate - + * + * @frame: + * @this: + * @fd: + * @offset: + * + */ +int32_t +ioc_ftruncate (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + off_t offset) +{ + uint64_t ioc_inode = 0; + inode_ctx_get (fd->inode, this, &ioc_inode); + + if (ioc_inode) + ioc_inode_flush ((ioc_inode_t *)(long)ioc_inode); + + STACK_WIND (frame, + ioc_truncate_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->ftruncate, + fd, + offset); + return 0; +} + +int32_t +ioc_lk_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct flock *lock) +{ + STACK_UNWIND (frame, op_ret, op_errno, lock); + return 0; +} + +int32_t +ioc_lk (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t cmd, + struct flock *lock) +{ + ioc_inode_t *ioc_inode = NULL; + uint64_t tmp_inode = 0; + + inode_ctx_get (fd->inode, this, &tmp_inode); + ioc_inode = (ioc_inode_t *)(long)tmp_inode; + if (!ioc_inode) { + gf_log (this->name, GF_LOG_ERROR, + "inode context is NULL: returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD, NULL); + return 0; + } + + ioc_inode_lock (ioc_inode); + { + gettimeofday (&ioc_inode->tv, NULL); + } + ioc_inode_unlock (ioc_inode); + + STACK_WIND (frame, ioc_lk_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->lk, fd, cmd, lock); + return 0; +} + +int32_t +ioc_get_priority_list (const char *opt_str, struct list_head *first) +{ + int32_t max_pri = 0; + char *tmp_str = NULL; + char *tmp_str1 = NULL; + char *tmp_str2 = NULL; + char *dup_str = NULL; + char *stripe_str = NULL; + char *pattern = NULL; + char *priority = NULL; + char *string = strdup (opt_str); + struct ioc_priority *curr = NULL; + + /* Get the pattern for cache priority. + * "option priority *.jpg:1,abc*:2" etc + */ + /* TODO: inode_lru in table is statically hard-coded to 5, + * should be changed to run-time configuration + */ + stripe_str = strtok_r (string, ",", &tmp_str); + while (stripe_str) { + curr = CALLOC (1, sizeof (struct ioc_priority)); + ERR_ABORT (curr); + list_add_tail (&curr->list, first); + + dup_str = strdup (stripe_str); + pattern = strtok_r (dup_str, ":", &tmp_str1); + if (!pattern) + return -1; + priority = strtok_r (NULL, ":", &tmp_str1); + if (!priority) + return -1; + gf_log ("io-cache", + GF_LOG_DEBUG, + "ioc priority : pattern %s : priority %s", + pattern, + priority); + curr->pattern = strdup (pattern); + curr->priority = strtol (priority, &tmp_str2, 0); + if (tmp_str2 && (*tmp_str2)) + return -1; + else + max_pri = max (max_pri, curr->priority); + stripe_str = strtok_r (NULL, ",", &tmp_str); + } + + return max_pri; +} + +/* + * init - + * @this: + * + */ +int32_t +init (xlator_t *this) +{ + ioc_table_t *table; + dict_t *options = this->options; + uint32_t index = 0; + char *page_size_string = NULL; + char *cache_size_string = NULL; + + if (!this->children || this->children->next) { + gf_log (this->name, GF_LOG_ERROR, + "FATAL: io-cache not configured with exactly " + "one child"); + return -1; + } + + if (!this->parents) { + gf_log (this->name, GF_LOG_WARNING, + "dangling volume. check volfile "); + } + + table = (void *) CALLOC (1, sizeof (*table)); + ERR_ABORT (table); + + table->xl = this; + table->page_size = IOC_PAGE_SIZE; + table->cache_size = IOC_CACHE_SIZE; + + if (dict_get (options, "page-size")) + page_size_string = data_to_str (dict_get (options, + "page-size")); + + if (page_size_string) { + if (gf_string2bytesize (page_size_string, + &table->page_size) != 0) { + gf_log ("io-cache", GF_LOG_ERROR, + "invalid number format \"%s\" of " + "\"option page-size\"", + page_size_string); + return -1; + } + gf_log (this->name, GF_LOG_DEBUG, + "using page-size %"PRIu64"", table->page_size); + } + + if (dict_get (options, "cache-size")) + cache_size_string = data_to_str (dict_get (options, + "cache-size")); + if (cache_size_string) { + if (gf_string2bytesize (cache_size_string, + &table->cache_size) != 0) { + gf_log ("io-cache", GF_LOG_ERROR, + "invalid number format \"%s\" of " + "\"option cache-size\"", + cache_size_string); + return -1; + } + + gf_log (this->name, GF_LOG_DEBUG, + "using cache-size %"PRIu64"", table->cache_size); + } + + table->cache_timeout = 1; + + if (dict_get (options, "cache-timeout")) { + table->cache_timeout = + data_to_uint32 (dict_get (options, + "cache-timeout")); + gf_log (this->name, GF_LOG_DEBUG, + "Using %d seconds to revalidate cache", + table->cache_timeout); + } + + INIT_LIST_HEAD (&table->priority_list); + if (dict_get (options, "priority")) { + char *option_list = data_to_str (dict_get (options, + "priority")); + gf_log (this->name, GF_LOG_DEBUG, + "option path %s", option_list); + /* parse the list of pattern:priority */ + table->max_pri = ioc_get_priority_list (option_list, + &table->priority_list); + + if (table->max_pri == -1) + return -1; + } + table->max_pri ++; + INIT_LIST_HEAD (&table->inodes); + + table->inode_lru = CALLOC (table->max_pri, sizeof (struct list_head)); + ERR_ABORT (table->inode_lru); + for (index = 0; index < (table->max_pri); index++) + INIT_LIST_HEAD (&table->inode_lru[index]); + + pthread_mutex_init (&table->table_lock, NULL); + this->private = table; + return 0; +} + +/* + * fini - + * + * @this: + * + */ +void +fini (xlator_t *this) +{ + ioc_table_t *table = this->private; + + pthread_mutex_destroy (&table->table_lock); + FREE (table); + + this->private = NULL; + return; +} + +struct xlator_fops fops = { + .open = ioc_open, + .create = ioc_create, + .readv = ioc_readv, + .writev = ioc_writev, + .truncate = ioc_truncate, + .ftruncate = ioc_ftruncate, + .utimens = ioc_utimens, + .lookup = ioc_lookup, + .lk = ioc_lk +}; + +struct xlator_mops mops = { +}; + +struct xlator_cbks cbks = { + .forget = ioc_forget, + .release = ioc_release +}; + +struct volume_options options[] = { + { .key = {"priority"}, + .type = GF_OPTION_TYPE_ANY + }, + { .key = {"cache-timeout", "force-revalidate-timeout"}, + .type = GF_OPTION_TYPE_INT, + .min = 0, + .max = 60 + }, + { .key = {"page-size"}, + .type = GF_OPTION_TYPE_SIZET, + .min = 16 * GF_UNIT_KB, + .max = 4 * GF_UNIT_MB + }, + { .key = {"cache-size"}, + .type = GF_OPTION_TYPE_SIZET, + .min = 4 * GF_UNIT_MB, + .max = 6 * GF_UNIT_GB + }, + { .key = {NULL} }, +}; diff --git a/xlators/performance/io-cache/src/io-cache.h b/xlators/performance/io-cache/src/io-cache.h new file mode 100644 index 00000000000..e997f6e7ca6 --- /dev/null +++ b/xlators/performance/io-cache/src/io-cache.h @@ -0,0 +1,330 @@ +/* + Copyright (c) 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef __IO_CACHE_H +#define __IO_CACHE_H + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include <sys/types.h> +#include "compat-errno.h" + +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "common-utils.h" +#include "call-stub.h" +#include <sys/time.h> +#include <fnmatch.h> + +#define IOC_PAGE_SIZE (1024 * 128) /* 128KB */ +#define IOC_CACHE_SIZE (32 * 1024 * 1024) + +struct ioc_table; +struct ioc_local; +struct ioc_page; +struct ioc_inode; + +struct ioc_priority { + struct list_head list; + char *pattern; + uint32_t priority; +}; + +/* + * ioc_waitq - this structure is used to represents the waiting + * frames on a page + * + * @next: pointer to next object in waitq + * @data: pointer to the frame which is waiting + */ +struct ioc_waitq { + struct ioc_waitq *next; + void *data; + off_t pending_offset; + size_t pending_size; +}; + +/* + * ioc_fill - + * + */ +struct ioc_fill { + struct list_head list; /* list of ioc_fill structures of a frame */ + off_t offset; + size_t size; + struct iovec *vector; + int32_t count; + dict_t *refs; +}; + +struct ioc_local { + mode_t mode; + int32_t flags; + loc_t file_loc; + off_t offset; + size_t size; + int32_t op_ret; + int32_t op_errno; + struct list_head fill_list; /* list of ioc_fill structures */ + off_t pending_offset; /* offset from this frame should continue */ + size_t pending_size; /* size of data this frame is waiting on */ + struct ioc_inode *inode; + int32_t wait_count; + pthread_mutex_t local_lock; + struct ioc_waitq *waitq; + void *stub; + fd_t *fd; + int32_t need_xattr; + dict_t *xattr_req; +}; + +/* + * ioc_page - structure to store page of data from file + * + */ +struct ioc_page { + struct list_head pages; + struct list_head page_lru; + struct ioc_inode *inode; /* inode this page belongs to */ + struct ioc_priority *priority; + char dirty; + char ready; + struct iovec *vector; + int32_t count; + off_t offset; + size_t size; + struct ioc_waitq *waitq; + dict_t *ref; + pthread_mutex_t page_lock; +}; + +struct ioc_inode { + struct ioc_table *table; + struct list_head pages; /* list of pages of this inode */ + struct list_head inode_list; /* list of inodes, maintained by io-cache translator */ + struct list_head inode_lru; + struct list_head page_lru; + struct ioc_waitq *waitq; + pthread_mutex_t inode_lock; + uint32_t weight; /* weight of the inode, increases on each read */ + time_t mtime; /* mtime of the server file when last cached */ + struct timeval tv; /* time-stamp at last re-validate */ +}; + +struct ioc_table { + uint64_t page_size; + uint64_t cache_size; + uint64_t cache_used; + struct list_head inodes; /* list of inodes cached */ + struct list_head active; + struct list_head *inode_lru; + struct list_head priority_list; + int32_t readv_count; + pthread_mutex_t table_lock; + xlator_t *xl; + uint32_t inode_count; + int32_t cache_timeout; + int32_t max_pri; +}; + +typedef struct ioc_table ioc_table_t; +typedef struct ioc_local ioc_local_t; +typedef struct ioc_page ioc_page_t; +typedef struct ioc_inode ioc_inode_t; +typedef struct ioc_waitq ioc_waitq_t; +typedef struct ioc_fill ioc_fill_t; + +void * +str_to_ptr (char *string); + +char * +ptr_to_str (void *ptr); + +int32_t +ioc_readv_disabled_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct iovec *vector, + int32_t count, + struct stat *stbuf); + +ioc_page_t * +ioc_page_get (ioc_inode_t *ioc_inode, + off_t offset); + +ioc_page_t * +ioc_page_create (ioc_inode_t *ioc_inode, + off_t offset); + +void +ioc_page_fault (ioc_inode_t *ioc_inode, + call_frame_t *frame, + fd_t *fd, + off_t offset); +void +ioc_wait_on_page (ioc_page_t *page, + call_frame_t *frame, + off_t offset, + size_t size); + +ioc_waitq_t * +ioc_page_wakeup (ioc_page_t *page); + +void +ioc_page_flush (ioc_page_t *page); + +ioc_waitq_t * +ioc_page_error (ioc_page_t *page, + int32_t op_ret, + int32_t op_errno); +void +ioc_page_purge (ioc_page_t *page); + +void +ioc_frame_return (call_frame_t *frame); + +void +ioc_waitq_return (ioc_waitq_t *waitq); + +void +ioc_frame_fill (ioc_page_t *page, + call_frame_t *frame, + off_t offset, + size_t size); + +#define ioc_inode_lock(ioc_inode) \ + do { \ + gf_log (ioc_inode->table->xl->name, GF_LOG_DEBUG, \ + "locked inode(%p)", ioc_inode); \ + pthread_mutex_lock (&ioc_inode->inode_lock); \ + } while (0) + + +#define ioc_inode_unlock(ioc_inode) \ + do { \ + gf_log (ioc_inode->table->xl->name, GF_LOG_DEBUG, \ + "unlocked inode(%p)", ioc_inode); \ + pthread_mutex_unlock (&ioc_inode->inode_lock); \ + } while (0) + + +#define ioc_table_lock(table) \ + do { \ + gf_log (table->xl->name, GF_LOG_DEBUG, \ + "locked table(%p)", table); \ + pthread_mutex_lock (&table->table_lock); \ + } while (0) + + +#define ioc_table_unlock(table) \ + do { \ + gf_log (table->xl->name, GF_LOG_DEBUG, \ + "unlocked table(%p)", table); \ + pthread_mutex_unlock (&table->table_lock); \ + } while (0) + + +#define ioc_local_lock(local) \ + do { \ + gf_log (local->inode->table->xl->name, GF_LOG_DEBUG, \ + "locked local(%p)", local); \ + pthread_mutex_lock (&local->local_lock); \ + } while (0) + + +#define ioc_local_unlock(local) \ + do { \ + gf_log (local->inode->table->xl->name, GF_LOG_DEBUG, \ + "unlocked local(%p)", local); \ + pthread_mutex_unlock (&local->local_lock); \ + } while (0) + + +#define ioc_page_lock(page) \ + do { \ + gf_log (page->inode->table->xl->name, GF_LOG_DEBUG, \ + "locked page(%p)", page); \ + pthread_mutex_lock (&page->page_lock); \ + } while (0) + + +#define ioc_page_unlock(page) \ + do { \ + gf_log (page->inode->table->xl->name, GF_LOG_DEBUG, \ + "unlocked page(%p)", page); \ + pthread_mutex_unlock (&page->page_lock); \ + } while (0) + + +static inline uint64_t +time_elapsed (struct timeval *now, + struct timeval *then) +{ + uint64_t sec = now->tv_sec - then->tv_sec; + + if (sec) + return sec; + + return 0; +} + +ioc_inode_t * +ioc_inode_search (ioc_table_t *table, + inode_t *inode); + +void +ioc_inode_destroy (ioc_inode_t *ioc_inode); + +ioc_inode_t * +ioc_inode_update (ioc_table_t *table, + inode_t *inode, + uint32_t weight); + +int64_t +ioc_page_destroy (ioc_page_t *page); + +int32_t +__ioc_inode_flush (ioc_inode_t *ioc_inode); + +void +ioc_inode_flush (ioc_inode_t *ioc_inode); + +void +ioc_inode_wakeup (call_frame_t *frame, + ioc_inode_t *ioc_inode, + struct stat *stbuf); + +int8_t +ioc_cache_still_valid (ioc_inode_t *ioc_inode, + struct stat *stbuf); + +int32_t +ioc_prune (ioc_table_t *table); + +int32_t +ioc_need_prune (ioc_table_t *table); + +#endif /* __READ_AHEAD_H */ diff --git a/xlators/performance/io-cache/src/ioc-inode.c b/xlators/performance/io-cache/src/ioc-inode.c new file mode 100644 index 00000000000..2e2e561dd23 --- /dev/null +++ b/xlators/performance/io-cache/src/ioc-inode.c @@ -0,0 +1,201 @@ +/* + Copyright (c) 2007, 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "io-cache.h" + + +/* + * str_to_ptr - convert a string to pointer + * @string: string + * + */ +void * +str_to_ptr (char *string) +{ + void *ptr = (void *)strtoul (string, NULL, 16); + return ptr; +} + + +/* + * ptr_to_str - convert a pointer to string + * @ptr: pointer + * + */ +char * +ptr_to_str (void *ptr) +{ + char *str; + asprintf (&str, "%p", ptr); + return str; +} + +void +ioc_inode_wakeup (call_frame_t *frame, + ioc_inode_t *ioc_inode, + struct stat *stbuf) +{ + ioc_waitq_t *waiter = NULL, *waited = NULL; + ioc_waitq_t *page_waitq = NULL; + int8_t cache_still_valid = 1; + ioc_local_t *local = frame->local; + int8_t need_fault = 0; + ioc_page_t *waiter_page = NULL; + + ioc_inode_lock (ioc_inode); + { + waiter = ioc_inode->waitq; + ioc_inode->waitq = NULL; + } + ioc_inode_unlock (ioc_inode); + + if (stbuf) + cache_still_valid = ioc_cache_still_valid (ioc_inode, stbuf); + else + cache_still_valid = 0; + + if (!waiter) { + gf_log (frame->this->name, GF_LOG_DEBUG, + "cache validate called without any " + "page waiting to be validated"); + } + + while (waiter) { + waiter_page = waiter->data; + page_waitq = NULL; + + if (waiter_page) { + if (cache_still_valid) { + /* cache valid, wake up page */ + ioc_inode_lock (ioc_inode); + { + page_waitq = + ioc_page_wakeup (waiter_page); + } + ioc_inode_unlock (ioc_inode); + if (page_waitq) + ioc_waitq_return (page_waitq); + } else { + /* cache invalid, generate page fault and set + * page->ready = 0, to avoid double faults + */ + ioc_inode_lock (ioc_inode); + + if (waiter_page->ready) { + waiter_page->ready = 0; + need_fault = 1; + } else { + gf_log (frame->this->name, + GF_LOG_DEBUG, + "validate frame(%p) is waiting" + "for in-transit page = %p", + frame, waiter_page); + } + + ioc_inode_unlock (ioc_inode); + + if (need_fault) { + need_fault = 0; + ioc_page_fault (ioc_inode, frame, + local->fd, + waiter_page->offset); + } + } + } + + waited = waiter; + waiter = waiter->next; + + waited->data = NULL; + free (waited); + } +} + +/* + * ioc_inode_update - create a new ioc_inode_t structure and add it to + * the table table. fill in the fields which are derived + * from inode_t corresponding to the file + * + * @table: io-table structure + * @inode: inode structure + * + * not for external reference + */ +ioc_inode_t * +ioc_inode_update (ioc_table_t *table, + inode_t *inode, + uint32_t weight) +{ + ioc_inode_t *ioc_inode = CALLOC (1, sizeof (ioc_inode_t)); + ERR_ABORT (ioc_inode); + + ioc_inode->table = table; + + /* initialize the list for pages */ + INIT_LIST_HEAD (&ioc_inode->pages); + INIT_LIST_HEAD (&ioc_inode->page_lru); + + ioc_table_lock (table); + + table->inode_count++; + list_add (&ioc_inode->inode_list, &table->inodes); + list_add_tail (&ioc_inode->inode_lru, &table->inode_lru[weight]); + + gf_log (table->xl->name, + GF_LOG_DEBUG, + "adding to inode_lru[%d]", weight); + + ioc_table_unlock (table); + + pthread_mutex_init (&ioc_inode->inode_lock, NULL); + ioc_inode->weight = weight; + + return ioc_inode; +} + + +/* + * ioc_inode_destroy - destroy an ioc_inode_t object. + * + * @inode: inode to destroy + * + * to be called only from ioc_forget. + */ +void +ioc_inode_destroy (ioc_inode_t *ioc_inode) +{ + ioc_table_t *table = ioc_inode->table; + + ioc_table_lock (table); + table->inode_count--; + list_del (&ioc_inode->inode_list); + list_del (&ioc_inode->inode_lru); + ioc_table_unlock (table); + + ioc_inode_flush (ioc_inode); + + pthread_mutex_destroy (&ioc_inode->inode_lock); + free (ioc_inode); +} + diff --git a/xlators/performance/io-cache/src/page.c b/xlators/performance/io-cache/src/page.c new file mode 100644 index 00000000000..e549f0bb547 --- /dev/null +++ b/xlators/performance/io-cache/src/page.c @@ -0,0 +1,778 @@ +/* + Copyright (c) 2007, 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "io-cache.h" +#include <assert.h> +#include <sys/time.h> + +ioc_page_t * +ioc_page_get (ioc_inode_t *ioc_inode, + off_t offset) +{ + int8_t found = 0; + ioc_page_t *page = NULL; + ioc_table_t *table = ioc_inode->table; + off_t rounded_offset = floor (offset, table->page_size); + + if (list_empty (&ioc_inode->pages)) { + return NULL; + } + + list_for_each_entry (page, &ioc_inode->pages, pages) { + if (page->offset == rounded_offset) { + found = 1; + break; + } + } + + /* was previously returning ioc_inode itself.., + * 1st of its type and found one more downstairs :O */ + if (!found){ + page = NULL; + } else { + /* push the page to the end of the lru list */ + list_move_tail (&page->page_lru, &ioc_inode->page_lru); + } + + return page; +} + + +/* + * ioc_page_destroy - + * + * @page: + * + */ +int64_t +ioc_page_destroy (ioc_page_t *page) +{ + int64_t page_size = 0; + + page_size = page->size; + + if (page->waitq) { + /* frames waiting on this page, do not destroy this page */ + page_size = -1; + } else { + + list_del (&page->pages); + list_del (&page->page_lru); + + gf_log (page->inode->table->xl->name, GF_LOG_DEBUG, + "destroying page = %p, offset = %"PRId64" " + "&& inode = %p", + page, page->offset, page->inode); + + if (page->vector){ + dict_unref (page->ref); + free (page->vector); + page->vector = NULL; + } + + page->inode = NULL; + + } + + if (page_size != -1) { + pthread_mutex_destroy (&page->page_lock); + free (page); + } + + return page_size; +} + +/* + * ioc_prune - prune the cache. we have a limit to the number of pages we + * can have in-memory. + * + * @table: ioc_table_t of this translator + * + */ +int32_t +ioc_prune (ioc_table_t *table) +{ + ioc_inode_t *curr = NULL, *next_ioc_inode = NULL; + ioc_page_t *page = NULL, *next = NULL; + int32_t ret = -1; + int32_t index = 0; + uint64_t size_to_prune = 0; + uint64_t size_pruned = 0; + + ioc_table_lock (table); + { + size_to_prune = table->cache_used - table->cache_size; + /* take out the least recently used inode */ + for (index=0; index < table->max_pri; index++) { + list_for_each_entry_safe (curr, next_ioc_inode, + &table->inode_lru[index], + inode_lru) { + /* prune page-by-page for this inode, till + * we reach the equilibrium */ + ioc_inode_lock (curr); + /* { */ + + list_for_each_entry_safe (page, next, + &curr->page_lru, + page_lru) { + /* done with all pages, and not + * reached equilibrium yet?? + * continue with next inode in + * lru_list */ + size_pruned += page->size; + ret = ioc_page_destroy (page); + + if (ret != -1) + table->cache_used -= ret; + + gf_log (table->xl->name, + GF_LOG_DEBUG, + "index = %d && table->cache_" + "used = %"PRIu64" && table->" + "cache_size = %"PRIu64, + index, table->cache_used, + table->cache_size); + + if (size_pruned >= size_to_prune) + break; + } /* list_for_each_entry_safe(page...) */ + if (list_empty (&curr->pages)) { + list_del_init (&curr->inode_lru); + } + + /* } */ + ioc_inode_unlock (curr); + + if (size_pruned >= size_to_prune) + break; + } /* list_for_each_entry_safe (curr...) */ + + if (size_pruned >= size_to_prune) + break; + } /* for(index=0;...) */ + + } /* ioc_inode_table locked region end */ + ioc_table_unlock (table); + + return 0; +} + +/* + * ioc_page_create - create a new page. + * + * @ioc_inode: + * @offset: + * + */ +ioc_page_t * +ioc_page_create (ioc_inode_t *ioc_inode, + off_t offset) +{ + ioc_table_t *table = ioc_inode->table; + ioc_page_t *page = NULL; + off_t rounded_offset = floor (offset, table->page_size); + ioc_page_t *newpage = CALLOC (1, sizeof (*newpage)); + ERR_ABORT (newpage); + + if (ioc_inode) + table = ioc_inode->table; + else { + return NULL; + } + + newpage->offset = rounded_offset; + newpage->inode = ioc_inode; + pthread_mutex_init (&newpage->page_lock, NULL); + + list_add_tail (&newpage->page_lru, &ioc_inode->page_lru); + list_add_tail (&newpage->pages, &ioc_inode->pages); + + page = newpage; + + gf_log ("io-cache", GF_LOG_DEBUG, + "returning new page %p", page); + return page; +} + +/* + * ioc_wait_on_page - pause a frame to wait till the arrival of a page. + * here we need to handle the case when the frame who calls wait_on_page + * himself has caused page_fault + * + * @page: page to wait on + * @frame: call frame who is waiting on page + * + */ +void +ioc_wait_on_page (ioc_page_t *page, + call_frame_t *frame, + off_t offset, + size_t size) +{ + ioc_waitq_t *waitq = NULL; + ioc_local_t *local = frame->local; + + waitq = CALLOC (1, sizeof (*waitq)); + ERR_ABORT (waitq); + + gf_log (frame->this->name, GF_LOG_DEBUG, + "frame(%p) waiting on page = %p, offset=%"PRId64", " + "size=%"GF_PRI_SIZET"", + frame, page, offset, size); + + waitq->data = frame; + waitq->next = page->waitq; + waitq->pending_offset = offset; + waitq->pending_size = size; + page->waitq = waitq; + /* one frame can wait only once on a given page, + * local->wait_count is number of pages a frame is waiting on */ + ioc_local_lock (local); + { + local->wait_count++; + } + ioc_local_unlock (local); +} + + +/* + * ioc_cache_still_valid - see if cached pages ioc_inode are still valid + * against given stbuf + * + * @ioc_inode: + * @stbuf: + * + * assumes ioc_inode is locked + */ +int8_t +ioc_cache_still_valid (ioc_inode_t *ioc_inode, + struct stat *stbuf) +{ + int8_t cache_still_valid = 1; + +#if 0 + if (!stbuf || (stbuf->st_mtime != ioc_inode->mtime) || + (stbuf->st_mtim.tv_nsec != ioc_inode->stbuf.st_mtim.tv_nsec)) + cache_still_valid = 0; + +#else + if (!stbuf || (stbuf->st_mtime != ioc_inode->mtime)) + cache_still_valid = 0; + +#endif + +#if 0 + /* talk with avati@zresearch.com to enable this section */ + if (!ioc_inode->mtime && stbuf) { + cache_still_valid = 1; + ioc_inode->mtime = stbuf->st_mtime; + } +#endif + + return cache_still_valid; +} + + +void +ioc_waitq_return (ioc_waitq_t *waitq) +{ + ioc_waitq_t *trav = NULL; + ioc_waitq_t *next = NULL; + call_frame_t *frame = NULL; + + for (trav = waitq; trav; trav = next) { + next = trav->next; + + frame = trav->data; + ioc_frame_return (frame); + free (trav); + } +} + + +int +ioc_fault_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct iovec *vector, + int32_t count, + struct stat *stbuf) +{ + ioc_local_t *local = frame->local; + off_t offset = local->pending_offset; + ioc_inode_t *ioc_inode = local->inode; + ioc_table_t *table = ioc_inode->table; + ioc_page_t *page = NULL; + off_t trav_offset = 0; + size_t payload_size = 0; + int32_t destroy_size = 0; + size_t page_size = 0; + ioc_waitq_t *waitq = NULL; + + trav_offset = offset; + payload_size = op_ret; + + ioc_inode_lock (ioc_inode); + { + if (op_ret == -1 || + (op_ret >= 0 && + !ioc_cache_still_valid(ioc_inode, stbuf))) { + gf_log (ioc_inode->table->xl->name, GF_LOG_DEBUG, + "cache for inode(%p) is invalid. flushing " + "all pages", ioc_inode); + destroy_size = __ioc_inode_flush (ioc_inode); + } + + if (op_ret >= 0) + ioc_inode->mtime = stbuf->st_mtime; + + gettimeofday (&ioc_inode->tv, NULL); + + if (op_ret < 0) { + /* error, readv returned -1 */ + page = ioc_page_get (ioc_inode, offset); + if (page) + waitq = ioc_page_error (page, op_ret, + op_errno); + } else { + gf_log (ioc_inode->table->xl->name, GF_LOG_DEBUG, + "op_ret = %d", op_ret); + page = ioc_page_get (ioc_inode, offset); + if (!page) { + /* page was flushed */ + /* some serious bug ? */ + gf_log (this->name, GF_LOG_DEBUG, + "wasted copy: %"PRId64"[+%"PRId64"] " + "ioc_inode=%p", offset, + table->page_size, ioc_inode); + } else { + if (page->vector) { + dict_unref (page->ref); + free (page->vector); + page->vector = NULL; + } + + /* keep a copy of the page for our cache */ + page->vector = iov_dup (vector, count); + page->count = count; + if (frame->root->rsp_refs) { + dict_ref (frame->root->rsp_refs); + page->ref = frame->root->rsp_refs; + } else { + /* TODO: we have got a response to + * our request and no data */ + gf_log (this->name, GF_LOG_CRITICAL, + "frame>root>rsp_refs is null"); + } /* if(frame->root->rsp_refs) */ + + /* page->size should indicate exactly how + * much the readv call to the child + * translator returned. earlier op_ret + * from child translator was used, which + * gave rise to a bug where reads from + * io-cached volume were resulting in 0 + * byte replies */ + page_size = iov_length(vector, count); + + page->size = page_size; + + if (page->waitq) { + /* wake up all the frames waiting on + * this page, including + * the frame which triggered fault */ + waitq = ioc_page_wakeup (page); + } /* if(page->waitq) */ + } /* if(!page)...else */ + } /* if(op_ret < 0)...else */ + } /* ioc_inode locked region end */ + ioc_inode_unlock (ioc_inode); + + ioc_waitq_return (waitq); + + if (page_size) { + ioc_table_lock (table); + { + table->cache_used += page_size; + } + ioc_table_unlock (table); + } + + if (destroy_size) { + ioc_table_lock (table); + { + table->cache_used -= destroy_size; + } + ioc_table_unlock (table); + } + + if (ioc_need_prune (ioc_inode->table)) { + ioc_prune (ioc_inode->table); + } + + gf_log (this->name, GF_LOG_DEBUG, "fault frame %p returned", frame); + pthread_mutex_destroy (&local->local_lock); + + fd_unref (local->fd); + + STACK_DESTROY (frame->root); + return 0; +} + +/* + * ioc_page_fault - + * + * @ioc_inode: + * @frame: + * @fd: + * @offset: + * + */ +void +ioc_page_fault (ioc_inode_t *ioc_inode, + call_frame_t *frame, + fd_t *fd, + off_t offset) +{ + ioc_table_t *table = ioc_inode->table; + call_frame_t *fault_frame = copy_frame (frame); + ioc_local_t *fault_local = CALLOC (1, sizeof (ioc_local_t)); + ERR_ABORT (fault_local); + + /* NOTE: copy_frame() means, the frame the fop whose fd_ref we + * are using till now won't be valid till we get reply from server. + * we unref this fd, in fault_cbk */ + fault_local->fd = fd_ref (fd); + + fault_frame->local = fault_local; + pthread_mutex_init (&fault_local->local_lock, NULL); + + INIT_LIST_HEAD (&fault_local->fill_list); + fault_local->pending_offset = offset; + fault_local->pending_size = table->page_size; + fault_local->inode = ioc_inode; + + gf_log (frame->this->name, GF_LOG_DEBUG, + "stack winding page fault for offset = %"PRId64" with " + "frame %p", offset, fault_frame); + + STACK_WIND (fault_frame, ioc_fault_cbk, + FIRST_CHILD(fault_frame->this), + FIRST_CHILD(fault_frame->this)->fops->readv, + fd, table->page_size, offset); + return; +} + +void +ioc_frame_fill (ioc_page_t *page, + call_frame_t *frame, + off_t offset, + size_t size) +{ + ioc_local_t *local = frame->local; + ioc_fill_t *fill = NULL; + off_t src_offset = 0; + off_t dst_offset = 0; + ssize_t copy_size = 0; + ioc_inode_t *ioc_inode = page->inode; + + gf_log (frame->this->name, GF_LOG_DEBUG, + "frame (%p) offset = %"PRId64" && size = %"GF_PRI_SIZET" " + "&& page->size = %"GF_PRI_SIZET" && wait_count = %d", + frame, offset, size, page->size, local->wait_count); + + /* immediately move this page to the end of the page_lru list */ + list_move_tail (&page->page_lru, &ioc_inode->page_lru); + /* fill local->pending_size bytes from local->pending_offset */ + if (local->op_ret != -1 && page->size) { + if (offset > page->offset) + /* offset is offset in file, convert it to offset in + * page */ + src_offset = offset - page->offset; + /*FIXME: since offset is the offset within page is the + * else case valid? */ + else + /* local->pending_offset is in previous page. do not + * fill until we have filled all previous pages */ + dst_offset = page->offset - offset; + + /* we have to copy from offset to either end of this page + * or till the requested size */ + copy_size = min (page->size - src_offset, + size - dst_offset); + + if (copy_size < 0) { + /* if page contains fewer bytes and the required offset + is beyond the page size in the page */ + copy_size = src_offset = 0; + } + + gf_log (page->inode->table->xl->name, GF_LOG_DEBUG, + "copy_size = %"GF_PRI_SIZET" && src_offset = " + "%"PRId64" && dst_offset = %"PRId64"", + copy_size, src_offset, dst_offset); + + { + ioc_fill_t *new = CALLOC (1, sizeof (*new)); + ERR_ABORT (new); + new->offset = page->offset; + new->size = copy_size; + new->refs = dict_ref (page->ref); + new->count = iov_subset (page->vector, + page->count, + src_offset, + src_offset + copy_size, + NULL); + new->vector = CALLOC (new->count, + sizeof (struct iovec)); + ERR_ABORT (new->vector); + new->count = iov_subset (page->vector, + page->count, + src_offset, + src_offset + copy_size, + new->vector); + + + + /* add the ioc_fill to fill_list for this frame */ + if (list_empty (&local->fill_list)) { + /* if list is empty, then this is the first + * time we are filling frame, add the + * ioc_fill_t to the end of list */ + list_add_tail (&new->list, &local->fill_list); + } else { + int8_t found = 0; + /* list is not empty, we need to look for + * where this offset fits in list */ + list_for_each_entry (fill, &local->fill_list, + list) { + if (fill->offset > new->offset) { + found = 1; + break; + } + } + + if (found) { + found = 0; + list_add_tail (&new->list, + &fill->list); + } else { + list_add_tail (&new->list, + &local->fill_list); + } + } + } + local->op_ret += copy_size; + } +} + +/* + * ioc_frame_unwind - frame unwinds only from here + * + * @frame: call frame to unwind + * + * to be used only by ioc_frame_return(), when a frame has + * finished waiting on all pages, required + * + */ +static void +ioc_frame_unwind (call_frame_t *frame) +{ + ioc_local_t *local = frame->local; + ioc_fill_t *fill = NULL, *next = NULL; + int32_t count = 0; + struct iovec *vector = NULL; + int32_t copied = 0; + dict_t *refs = NULL; + struct stat stbuf = {0,}; + int32_t op_ret = 0; + + // ioc_local_lock (local); + refs = get_new_dict (); + + frame->local = NULL; + + if (list_empty (&local->fill_list)) { + gf_log (frame->this->name, GF_LOG_DEBUG, + "frame(%p) has 0 entries in local->fill_list " + "(offset = %"PRId64" && size = %"GF_PRI_SIZET")", + frame, local->offset, local->size); + } + + list_for_each_entry (fill, &local->fill_list, list) { + count += fill->count; + } + + vector = CALLOC (count, sizeof (*vector)); + ERR_ABORT (vector); + + list_for_each_entry_safe (fill, next, &local->fill_list, list) { + memcpy (((char *)vector) + copied, + fill->vector, + fill->count * sizeof (*vector)); + + copied += (fill->count * sizeof (*vector)); + + dict_copy (fill->refs, refs); + + list_del (&fill->list); + dict_unref (fill->refs); + free (fill->vector); + free (fill); + } + + frame->root->rsp_refs = dict_ref (refs); + + op_ret = iov_length (vector, count); + gf_log (frame->this->name, GF_LOG_DEBUG, + "frame(%p) unwinding with op_ret=%d", frame, op_ret); + + // ioc_local_unlock (local); + + STACK_UNWIND (frame, + op_ret, + local->op_errno, + vector, + count, + &stbuf); + + dict_unref (refs); + + pthread_mutex_destroy (&local->local_lock); + free (local); + free (vector); + + return; +} + +/* + * ioc_frame_return - + * @frame: + * + * to be called only when a frame is waiting on an in-transit page + */ +void +ioc_frame_return (call_frame_t *frame) +{ + ioc_local_t *local = frame->local; + int32_t wait_count; + assert (local->wait_count > 0); + + ioc_local_lock (local); + { + wait_count = --local->wait_count; + } + ioc_local_unlock (local); + + if (!wait_count) { + ioc_frame_unwind (frame); + } + + return; +} + +/* + * ioc_page_wakeup - + * @page: + * + * to be called only when a frame is waiting on an in-transit page + */ +ioc_waitq_t * +ioc_page_wakeup (ioc_page_t *page) +{ + ioc_waitq_t *waitq = NULL, *trav = NULL; + call_frame_t *frame = NULL; + + waitq = page->waitq; + page->waitq = NULL; + + trav = waitq; + page->ready = 1; + + gf_log (page->inode->table->xl->name, GF_LOG_DEBUG, + "page is %p && waitq = %p", page, waitq); + + for (trav = waitq; trav; trav = trav->next) { + frame = trav->data; + ioc_frame_fill (page, frame, trav->pending_offset, + trav->pending_size); + } + + return waitq; +} + + +/* + * ioc_page_error - + * @page: + * @op_ret: + * @op_errno: + * + */ +ioc_waitq_t * +ioc_page_error (ioc_page_t *page, + int32_t op_ret, + int32_t op_errno) +{ + ioc_waitq_t *waitq = NULL, *trav = NULL; + call_frame_t *frame = NULL; + int64_t ret = 0; + ioc_table_t *table = NULL; + ioc_local_t *local = NULL; + + waitq = page->waitq; + page->waitq = NULL; + + gf_log (page->inode->table->xl->name, GF_LOG_DEBUG, + "page error for page = %p & waitq = %p", page, waitq); + + for (trav = waitq; trav; trav = trav->next) { + + frame = trav->data; + + local = frame->local; + ioc_local_lock (local); + { + if (local->op_ret != -1) { + local->op_ret = op_ret; + local->op_errno = op_errno; + } + } + ioc_local_unlock (local); + } + + table = page->inode->table; + ret = ioc_page_destroy (page); + + if (ret != -1) { + table->cache_used -= ret; + } + + return waitq; +} diff --git a/xlators/performance/io-threads/Makefile.am b/xlators/performance/io-threads/Makefile.am new file mode 100644 index 00000000000..d471a3f9243 --- /dev/null +++ b/xlators/performance/io-threads/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = src + +CLEANFILES = diff --git a/xlators/performance/io-threads/src/Makefile.am b/xlators/performance/io-threads/src/Makefile.am new file mode 100644 index 00000000000..38dea3eb7fc --- /dev/null +++ b/xlators/performance/io-threads/src/Makefile.am @@ -0,0 +1,14 @@ +xlator_LTLIBRARIES = io-threads.la +xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance + +io_threads_la_LDFLAGS = -module -avoidversion + +io_threads_la_SOURCES = io-threads.c +io_threads_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la + +noinst_HEADERS = io-threads.h + +AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\ + -I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS) + +CLEANFILES = diff --git a/xlators/performance/io-threads/src/io-threads.c b/xlators/performance/io-threads/src/io-threads.c new file mode 100644 index 00000000000..5acdd627da4 --- /dev/null +++ b/xlators/performance/io-threads/src/io-threads.c @@ -0,0 +1,1254 @@ +/* + Copyright (c) 2006, 2007, 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "call-stub.h" +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "io-threads.h" + +static void +iot_queue (iot_worker_t *worker, + call_stub_t *stub); + +static call_stub_t * +iot_dequeue (iot_worker_t *worker); + +static iot_worker_t * +iot_schedule (iot_conf_t *conf, + iot_file_t *file, + ino_t ino) +{ + int32_t cnt = (ino % conf->thread_count); + iot_worker_t *trav = conf->workers.next; + + for (; cnt; cnt--) + trav = trav->next; + + if (file) + file->worker = trav; + trav->fd_count++; + return trav; +} + +int32_t +iot_open_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd) +{ + iot_conf_t *conf = this->private; + + if (op_ret >= 0) { + iot_file_t *file = CALLOC (1, sizeof (*file)); + ERR_ABORT (file); + + iot_schedule (conf, file, fd->inode->ino); + file->fd = fd; + + fd_ctx_set (fd, this, (uint64_t)(long)file); + + pthread_mutex_lock (&conf->files_lock); + file->next = &conf->files; + file->prev = file->next->prev; + file->next->prev = file; + file->prev->next = file; + pthread_mutex_unlock (&conf->files_lock); + } + STACK_UNWIND (frame, op_ret, op_errno, fd); + return 0; +} + +int32_t +iot_open (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags, + fd_t *fd) +{ + STACK_WIND (frame, + iot_open_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->open, + loc, + flags, + fd); + return 0; +} + + +int32_t +iot_create_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd, + inode_t *inode, + struct stat *stbuf) +{ + iot_conf_t *conf = this->private; + + if (op_ret >= 0) { + iot_file_t *file = CALLOC (1, sizeof (*file)); + ERR_ABORT (file); + + iot_schedule (conf, file, fd->inode->ino); + file->fd = fd; + + fd_ctx_set (fd, this, (uint64_t)(long)file); + + pthread_mutex_lock (&conf->files_lock); + file->next = &conf->files; + file->prev = file->next->prev; + file->next->prev = file; + file->prev->next = file; + pthread_mutex_unlock (&conf->files_lock); + } + STACK_UNWIND (frame, op_ret, op_errno, fd, inode, stbuf); + return 0; +} + +int32_t +iot_create (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags, + mode_t mode, + fd_t *fd) +{ + STACK_WIND (frame, + iot_create_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->create, + loc, + flags, + mode, + fd); + return 0; +} + + + +int32_t +iot_readv_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct iovec *vector, + int32_t count, + struct stat *stbuf) +{ + iot_local_t *local = frame->local; + + local->frame_size = 0; //iov_length (vector, count); + + STACK_UNWIND (frame, op_ret, op_errno, vector, count, stbuf); + + return 0; +} + +static int32_t +iot_readv_wrapper (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + size_t size, + off_t offset) +{ + STACK_WIND (frame, + iot_readv_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readv, + fd, + size, + offset); + return 0; +} + +int32_t +iot_readv (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + size_t size, + off_t offset) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_file_t *file = NULL; + iot_worker_t *worker = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, + "fd context is NULL, returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (iot_file_t *)(long)tmp_file; + worker = file->worker; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + frame->local = local; + + stub = fop_readv_stub (frame, + iot_readv_wrapper, + fd, + size, + offset); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, + "cannot get readv call stub"); + STACK_UNWIND (frame, -1, ENOMEM, NULL, 0); + return 0; + } + + iot_queue (worker, stub); + + return 0; +} + +int32_t +iot_flush_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + +static int32_t +iot_flush_wrapper (call_frame_t *frame, + xlator_t *this, + fd_t *fd) +{ + STACK_WIND (frame, + iot_flush_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->flush, + fd); + return 0; +} + +int32_t +iot_flush (call_frame_t *frame, + xlator_t *this, + fd_t *fd) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_file_t *file = NULL; + iot_worker_t *worker = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, + "fd context is NULL, returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (iot_file_t *)(long)tmp_file; + worker = file->worker; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + + frame->local = local; + + stub = fop_flush_stub (frame, + iot_flush_wrapper, + fd); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get flush_cbk call stub"); + STACK_UNWIND (frame, -1, ENOMEM); + return 0; + } + iot_queue (worker, stub); + + return 0; +} + +int32_t +iot_fsync_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + +static int32_t +iot_fsync_wrapper (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t datasync) +{ + STACK_WIND (frame, + iot_fsync_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->fsync, + fd, + datasync); + return 0; +} + +int32_t +iot_fsync (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t datasync) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_file_t *file = NULL; + iot_worker_t *worker = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, + "fd context is NULL, returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (iot_file_t *)(long)tmp_file; + worker = file->worker; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + + frame->local = local; + + stub = fop_fsync_stub (frame, + iot_fsync_wrapper, + fd, + datasync); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fsync_cbk call stub"); + STACK_UNWIND (frame, -1, ENOMEM); + return 0; + } + iot_queue (worker, stub); + + return 0; +} + +int32_t +iot_writev_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *stbuf) +{ + iot_local_t *local = frame->local; + + local->frame_size = 0; /* hehe, caught me! */ + + STACK_UNWIND (frame, op_ret, op_errno, stbuf); + return 0; +} + +static int32_t +iot_writev_wrapper (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + struct iovec *vector, + int32_t count, + off_t offset) +{ + STACK_WIND (frame, + iot_writev_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->writev, + fd, + vector, + count, + offset); + return 0; +} + +int32_t +iot_writev (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + struct iovec *vector, + int32_t count, + off_t offset) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_file_t *file = NULL; + iot_worker_t *worker = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, + "fd context is NULL, returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (iot_file_t *)(long)tmp_file; + worker = file->worker; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + + if (frame->root->req_refs) + local->frame_size = dict_serialized_length (frame->root->req_refs); + else + local->frame_size = iov_length (vector, count); + frame->local = local; + + stub = fop_writev_stub (frame, iot_writev_wrapper, + fd, vector, count, offset); + + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get writev call stub"); + STACK_UNWIND (frame, -1, ENOMEM); + return 0; + } + + iot_queue (worker, stub); + + return 0; +} + + +int32_t +iot_lk_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct flock *flock) +{ + STACK_UNWIND (frame, op_ret, op_errno, flock); + return 0; +} + + +static int32_t +iot_lk_wrapper (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t cmd, + struct flock *flock) +{ + STACK_WIND (frame, + iot_lk_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->lk, + fd, + cmd, + flock); + return 0; +} + + +int32_t +iot_lk (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t cmd, + struct flock *flock) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_file_t *file = NULL; + iot_worker_t *worker = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, + "fd context is NULL, returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (iot_file_t *)(long)tmp_file; + worker = file->worker; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + frame->local = local; + + stub = fop_lk_stub (frame, iot_lk_wrapper, + fd, cmd, flock); + + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fop_lk call stub"); + STACK_UNWIND (frame, -1, ENOMEM, NULL); + return 0; + } + + iot_queue (worker, stub); + + return 0; +} + + +int32_t +iot_stat_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + + +static int32_t +iot_stat_wrapper (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + STACK_WIND (frame, + iot_stat_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->stat, + loc); + return 0; +} + +int32_t +iot_stat (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_worker_t *worker = NULL; + iot_conf_t *conf; + fd_t *fd = NULL; + + conf = this->private; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + frame->local = local; + + fd = fd_lookup (loc->inode, frame->root->pid); + + if (fd == NULL) { + STACK_WIND(frame, + iot_stat_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->stat, + loc); + return 0; + } + + fd_unref (fd); + + worker = iot_schedule (conf, NULL, loc->inode->ino); + + stub = fop_stat_stub (frame, + iot_stat_wrapper, + loc); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fop_stat call stub"); + STACK_UNWIND (frame, -1, ENOMEM, NULL); + return 0; + } + iot_queue (worker, stub); + + return 0; +} + + +int32_t +iot_fstat_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +static int32_t +iot_fstat_wrapper (call_frame_t *frame, + xlator_t *this, + fd_t *fd) +{ + STACK_WIND (frame, + iot_fstat_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fstat, + fd); + return 0; +} + +int32_t +iot_fstat (call_frame_t *frame, + xlator_t *this, + fd_t *fd) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_file_t *file = NULL; + iot_worker_t *worker = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, + "fd context is NULL, returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (iot_file_t *)(long)tmp_file; + worker = file->worker; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + frame->local = local; + stub = fop_fstat_stub (frame, + iot_fstat_wrapper, + fd); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fop_fstat call stub"); + STACK_UNWIND (frame, -1, ENOMEM, NULL); + return 0; + } + + iot_queue (worker, stub); + + return 0; +} + +int32_t +iot_truncate_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +static int32_t +iot_truncate_wrapper (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + off_t offset) +{ + STACK_WIND (frame, + iot_truncate_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->truncate, + loc, + offset); + return 0; +} + +int32_t +iot_truncate (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + off_t offset) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_worker_t *worker = NULL; + iot_conf_t *conf; + fd_t *fd = NULL; + + conf = this->private; + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + frame->local = local; + + fd = fd_lookup (loc->inode, frame->root->pid); + + if (fd == NULL) { + STACK_WIND(frame, + iot_truncate_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->truncate, + loc, + offset); + return 0; + } + + fd_unref (fd); + + worker = iot_schedule (conf, NULL, loc->inode->ino); + + stub = fop_truncate_stub (frame, + iot_truncate_wrapper, + loc, + offset); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fop_stat call stub"); + STACK_UNWIND (frame, -1, ENOMEM, NULL); + return 0; + } + iot_queue (worker, stub); + + return 0; +} + +int32_t +iot_ftruncate_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +static int32_t +iot_ftruncate_wrapper (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + off_t offset) +{ + STACK_WIND (frame, + iot_ftruncate_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->ftruncate, + fd, + offset); + return 0; +} + +int32_t +iot_ftruncate (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + off_t offset) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_file_t *file = NULL; + iot_worker_t *worker = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, + "fd context is NULL, returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (iot_file_t *)(long)tmp_file; + worker = file->worker; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + frame->local = local; + + stub = fop_ftruncate_stub (frame, + iot_ftruncate_wrapper, + fd, + offset); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fop_ftruncate call stub"); + STACK_UNWIND (frame, -1, ENOMEM, NULL); + return 0; + } + iot_queue (worker, stub); + + return 0; +} + +int32_t +iot_utimens_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +static int32_t +iot_utimens_wrapper (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + struct timespec tv[2]) +{ + STACK_WIND (frame, + iot_utimens_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->utimens, + loc, + tv); + + return 0; +} + +int32_t +iot_utimens (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + struct timespec tv[2]) +{ + call_stub_t *stub; + iot_local_t *local = NULL; + iot_worker_t *worker = NULL; + iot_conf_t *conf; + fd_t *fd = NULL; + + conf = this->private; + + local = CALLOC (1, sizeof (*local)); + ERR_ABORT (local); + frame->local = local; + + fd = fd_lookup (loc->inode, frame->root->pid); + + if (fd == NULL) { + STACK_WIND(frame, + iot_utimens_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->utimens, + loc, + tv); + return 0; + } + + fd_unref (fd); + + worker = iot_schedule (conf, NULL, loc->inode->ino); + + stub = fop_utimens_stub (frame, + iot_utimens_wrapper, + loc, + tv); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fop_utimens call stub"); + STACK_UNWIND (frame, -1, ENOMEM, NULL); + return 0; + } + iot_queue (worker, stub); + + return 0; +} + + +int32_t +iot_checksum_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + uint8_t *file_checksum, + uint8_t *dir_checksum) +{ + STACK_UNWIND (frame, op_ret, op_errno, file_checksum, dir_checksum); + return 0; +} + +static int32_t +iot_checksum_wrapper (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags) +{ + STACK_WIND (frame, + iot_checksum_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->checksum, + loc, + flags); + + return 0; +} + +int32_t +iot_checksum (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags) +{ + call_stub_t *stub = NULL; + iot_local_t *local = NULL; + iot_worker_t *worker = NULL; + iot_conf_t *conf = NULL; + + conf = this->private; + + local = CALLOC (1, sizeof (*local)); + frame->local = local; + + worker = iot_schedule (conf, NULL, conf->misc_thread_index++); + + stub = fop_checksum_stub (frame, + iot_checksum_wrapper, + loc, + flags); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fop_checksum call stub"); + STACK_UNWIND (frame, -1, ENOMEM, NULL, NULL); + return 0; + } + iot_queue (worker, stub); + + return 0; +} + + +int32_t +iot_unlink_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + +static int32_t +iot_unlink_wrapper (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + STACK_WIND (frame, + iot_unlink_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->unlink, + loc); + + return 0; +} + +int32_t +iot_unlink (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + call_stub_t *stub = NULL; + iot_local_t *local = NULL; + iot_worker_t *worker = NULL; + iot_conf_t *conf = NULL; + + conf = this->private; + + local = CALLOC (1, sizeof (*local)); + frame->local = local; + + worker = iot_schedule (conf, NULL, conf->misc_thread_index++); + + stub = fop_unlink_stub (frame, iot_unlink_wrapper, loc); + if (!stub) { + gf_log (this->name, GF_LOG_ERROR, "cannot get fop_unlink call stub"); + STACK_UNWIND (frame, -1, ENOMEM); + return 0; + } + iot_queue (worker, stub); + + return 0; +} + +int32_t +iot_release (xlator_t *this, + fd_t *fd) +{ + iot_file_t *file = NULL; + iot_conf_t *conf = NULL; + uint64_t tmp_file = 0; + int ret = 0; + + conf = this->private; + ret = fd_ctx_del (fd, this, &tmp_file); + if (ret) + return 0; + + file = (iot_file_t *)(long)tmp_file; + + pthread_mutex_lock (&conf->files_lock); + { + (file->prev)->next = file->next; + (file->next)->prev = file->prev; + } + pthread_mutex_unlock (&conf->files_lock); + + FREE (file); + return 0; +} + + +static void +iot_queue (iot_worker_t *worker, + call_stub_t *stub) +{ + iot_queue_t *queue; + iot_conf_t *conf = worker->conf; + iot_local_t *local = stub->frame->local; + size_t frame_size = local->frame_size; + + queue = CALLOC (1, sizeof (*queue)); + ERR_ABORT (queue); + queue->stub = stub; + + pthread_mutex_lock (&conf->lock); + + /* + while (worker->queue_size >= worker->queue_limit) + pthread_cond_wait (&worker->q_cond, &worker->lock); + */ + if (conf->cache_size) { + while (frame_size && (conf->current_size >= conf->cache_size)) + pthread_cond_wait (&conf->q_cond, &conf->lock); + } + + queue->next = &worker->queue; + queue->prev = worker->queue.prev; + + queue->next->prev = queue; + queue->prev->next = queue; + + /* dq_cond */ + worker->queue_size++; + worker->q++; + + conf->current_size += local->frame_size; + + pthread_cond_broadcast (&worker->dq_cond); + + pthread_mutex_unlock (&conf->lock); +} + +static call_stub_t * +iot_dequeue (iot_worker_t *worker) +{ + call_stub_t *stub = NULL; + iot_queue_t *queue = NULL; + iot_conf_t *conf = worker->conf; + iot_local_t *local = NULL; + + + pthread_mutex_lock (&conf->lock); + + while (!worker->queue_size) + /* + pthread_cond_wait (&worker->dq_cond, &worker->lock); + */ + pthread_cond_wait (&worker->dq_cond, &conf->lock); + + queue = worker->queue.next; + + queue->next->prev = queue->prev; + queue->prev->next = queue->next; + + stub = queue->stub; + local = stub->frame->local; + + worker->queue_size--; + worker->dq++; + + /* q_cond */ + conf->current_size -= local->frame_size; + + pthread_cond_broadcast (&conf->q_cond); + + pthread_mutex_unlock (&conf->lock); + + FREE (queue); + + return stub; +} + +static void * +iot_worker (void *arg) +{ + iot_worker_t *worker = arg; + + while (1) { + call_stub_t *stub; + + stub = iot_dequeue (worker); + call_resume (stub); + } +} + +#if 0 +static void * +iot_reply (void *arg) +{ + iot_worker_t *reply = arg; + + while (1) { + call_stub_t *stub; + + stub = iot_dequeue (reply); + FREE (stub->frame->local); + stub->frame->local = NULL; + call_resume (stub); + } +} +#endif + +static void +workers_init (iot_conf_t *conf) +{ + int i; + + conf->workers.next = &conf->workers; + conf->workers.prev = &conf->workers; + + for (i=0; i<conf->thread_count; i++) { + + iot_worker_t *worker = CALLOC (1, sizeof (*worker)); + ERR_ABORT (worker); + + worker->next = &conf->workers; + worker->prev = conf->workers.prev; + worker->next->prev = worker; + worker->prev->next = worker; + + worker->queue.next = &worker->queue; + worker->queue.prev = &worker->queue; + + /* + pthread_mutex_init (&worker->lock, NULL); + pthread_cond_init (&worker->q_cond, NULL); + */ + pthread_cond_init (&worker->dq_cond, NULL); + + /* + worker->queue_limit = conf->queue_limit; + */ + + worker->conf = conf; + + pthread_create (&worker->thread, NULL, iot_worker, worker); + } +} + +int32_t +init (xlator_t *this) +{ + iot_conf_t *conf; + dict_t *options = this->options; + + if (!this->children || this->children->next) { + gf_log ("io-threads", + GF_LOG_ERROR, + "FATAL: iot not configured with exactly one child"); + return -1; + } + + if (!this->parents) { + gf_log (this->name, GF_LOG_WARNING, + "dangling volume. check volfile "); + } + + conf = (void *) CALLOC (1, sizeof (*conf)); + ERR_ABORT (conf); + + conf->thread_count = 1; + + if (dict_get (options, "thread-count")) { + conf->thread_count = data_to_int32 (dict_get (options, + "thread-count")); + gf_log ("io-threads", + GF_LOG_DEBUG, + "Using conf->thread_count = %d", + conf->thread_count); + } + + pthread_mutex_init (&conf->lock, NULL); + pthread_cond_init (&conf->q_cond, NULL); + + conf->files.next = &conf->files; + conf->files.prev = &conf->files; + pthread_mutex_init (&conf->files_lock, NULL); + + workers_init (conf); + + this->private = conf; + return 0; +} + +void +fini (xlator_t *this) +{ + iot_conf_t *conf = this->private; + + FREE (conf); + + this->private = NULL; + return; +} + +struct xlator_fops fops = { + .open = iot_open, + .create = iot_create, + .readv = iot_readv, + .writev = iot_writev, + .flush = iot_flush, + .fsync = iot_fsync, + .lk = iot_lk, + .stat = iot_stat, + .fstat = iot_fstat, + .truncate = iot_truncate, + .ftruncate = iot_ftruncate, + .utimens = iot_utimens, + .checksum = iot_checksum, + .unlink = iot_unlink, +}; + +struct xlator_mops mops = { +}; + +struct xlator_cbks cbks = { + .release = iot_release, +}; + +struct volume_options options[] = { + { .key = {"thread-count"}, + .type = GF_OPTION_TYPE_INT, + .min = 1, + .max = 32 + }, + { .key = {NULL} }, +}; diff --git a/xlators/performance/io-threads/src/io-threads.h b/xlators/performance/io-threads/src/io-threads.h new file mode 100644 index 00000000000..6595d3e277b --- /dev/null +++ b/xlators/performance/io-threads/src/io-threads.h @@ -0,0 +1,99 @@ +/* + Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef __IOT_H +#define __IOT_H + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + + +#include "compat-errno.h" +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "common-utils.h" + +#define min(a,b) ((a)<(b)?(a):(b)) +#define max(a,b) ((a)>(b)?(a):(b)) + +struct iot_conf; +struct iot_worker; +struct iot_queue; +struct iot_local; +struct iot_file; + +struct iot_local { + struct iot_file *file; + size_t frame_size; +}; + +struct iot_queue { + struct iot_queue *next, *prev; + call_stub_t *stub; +}; + +struct iot_worker { + struct iot_worker *next, *prev; + struct iot_queue queue; + struct iot_conf *conf; + int64_t q,dq; + pthread_cond_t dq_cond; + /* + pthread_cond_t q_cond; + pthread_mutex_t lock; + */ + int32_t fd_count; + int32_t queue_size; + /* + int32_t queue_limit; + */ + pthread_t thread; +}; + +struct iot_file { + struct iot_file *next, *prev; /* all open files via this xlator */ + struct iot_worker *worker; + fd_t *fd; + int32_t pending_ops; +}; + +struct iot_conf { + int32_t thread_count; + int32_t misc_thread_index; /* Used to schedule the miscellaneous calls like checksum */ + struct iot_worker workers; + struct iot_file files; + pthread_mutex_t files_lock; + + uint64_t cache_size; + off_t current_size; + pthread_cond_t q_cond; + pthread_mutex_t lock; +}; + +typedef struct iot_file iot_file_t; +typedef struct iot_conf iot_conf_t; +typedef struct iot_local iot_local_t; +typedef struct iot_worker iot_worker_t; +typedef struct iot_queue iot_queue_t; + +#endif /* __IOT_H */ diff --git a/xlators/performance/read-ahead/Makefile.am b/xlators/performance/read-ahead/Makefile.am new file mode 100644 index 00000000000..d471a3f9243 --- /dev/null +++ b/xlators/performance/read-ahead/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = src + +CLEANFILES = diff --git a/xlators/performance/read-ahead/src/Makefile.am b/xlators/performance/read-ahead/src/Makefile.am new file mode 100644 index 00000000000..7bb90228227 --- /dev/null +++ b/xlators/performance/read-ahead/src/Makefile.am @@ -0,0 +1,14 @@ +xlator_LTLIBRARIES = read-ahead.la +xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance + +read_ahead_la_LDFLAGS = -module -avoidversion + +read_ahead_la_SOURCES = read-ahead.c page.c +read_ahead_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la + +noinst_HEADERS = read-ahead.h + +AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\ + -I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS) + +CLEANFILES = diff --git a/xlators/performance/read-ahead/src/page.c b/xlators/performance/read-ahead/src/page.c new file mode 100644 index 00000000000..3b8d4d2093e --- /dev/null +++ b/xlators/performance/read-ahead/src/page.c @@ -0,0 +1,487 @@ +/* + Copyright (c) 2006, 2007, 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "read-ahead.h" +#include <assert.h> + + +ra_page_t * +ra_page_get (ra_file_t *file, + off_t offset) +{ + ra_page_t *page = NULL; + off_t rounded_offset = 0; + + page = file->pages.next; + rounded_offset = floor (offset, file->page_size); + + while (page != &file->pages && page->offset < rounded_offset) + page = page->next; + + if (page == &file->pages || page->offset != rounded_offset) + page = NULL; + + return page; +} + + +ra_page_t * +ra_page_create (ra_file_t *file, off_t offset) +{ + ra_page_t *page = NULL; + off_t rounded_offset = 0; + ra_page_t *newpage = NULL; + + page = file->pages.next; + rounded_offset = floor (offset, file->page_size); + + while (page != &file->pages && page->offset < rounded_offset) + page = page->next; + + if (page == &file->pages || page->offset != rounded_offset) { + newpage = CALLOC (1, sizeof (*newpage)); + if (!newpage) + return NULL; + + newpage->offset = rounded_offset; + newpage->prev = page->prev; + newpage->next = page; + newpage->file = file; + page->prev->next = newpage; + page->prev = newpage; + + page = newpage; + } + + return page; +} + + +void +ra_wait_on_page (ra_page_t *page, call_frame_t *frame) +{ + ra_waitq_t *waitq = NULL; + ra_local_t *local = NULL; + + + local = frame->local; + waitq = CALLOC (1, sizeof (*waitq)); + if (!waitq) { + gf_log (frame->this->name, GF_LOG_ERROR, + "out of memory :("); + return; + } + + waitq->data = frame; + waitq->next = page->waitq; + page->waitq = waitq; + + ra_local_lock (local); + { + local->wait_count++; + } + ra_local_unlock (local); +} + + +void +ra_waitq_return (ra_waitq_t *waitq) +{ + ra_waitq_t *trav = NULL; + ra_waitq_t *next = NULL; + call_frame_t *frame = NULL; + + for (trav = waitq; trav; trav = next) { + next = trav->next; + + frame = trav->data; + ra_frame_return (frame); + free (trav); + } +} + + +int +ra_fault_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iovec *vector, + int32_t count, struct stat *stbuf) +{ + ra_local_t *local = NULL; + off_t pending_offset = 0; + ra_file_t *file = NULL; + ra_page_t *page = NULL; + off_t trav_offset = 0; + size_t payload_size = 0; + ra_waitq_t *waitq = NULL; + fd_t *fd = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + local = frame->local; + fd = local->fd; + + ret = fd_ctx_get (fd, this, &tmp_file); + + file = (ra_file_t *)(long)tmp_file; + pending_offset = local->pending_offset; + trav_offset = pending_offset; + payload_size = op_ret; + + ra_file_lock (file); + { + if (op_ret >= 0) + file->stbuf = *stbuf; + + if (op_ret < 0) { + page = ra_page_get (file, pending_offset); + if (page) + waitq = ra_page_error (page, op_ret, op_errno); + goto unlock; + } + + page = ra_page_get (file, pending_offset); + if (!page) { + gf_log (this->name, GF_LOG_DEBUG, + "wasted copy: %"PRId64"[+%"PRId64"] file=%p", + pending_offset, file->page_size, file); + goto unlock; + } + + if (page->vector) { + dict_unref (page->ref); + free (page->vector); + } + + page->vector = iov_dup (vector, count); + page->count = count; + page->ref = dict_ref (frame->root->rsp_refs); + page->ready = 1; + + page->size = iov_length (vector, count); + + waitq = ra_page_wakeup (page); + } +unlock: + ra_file_unlock (file); + + ra_waitq_return (waitq); + + fd_unref (local->fd); + + free (frame->local); + frame->local = NULL; + + STACK_DESTROY (frame->root); + return 0; +} + + +void +ra_page_fault (ra_file_t *file, + call_frame_t *frame, + off_t offset) +{ + call_frame_t *fault_frame = NULL; + ra_local_t *fault_local = NULL; + + fault_frame = copy_frame (frame); + fault_local = CALLOC (1, sizeof (ra_local_t)); + + fault_frame->local = fault_local; + fault_local->pending_offset = offset; + fault_local->pending_size = file->page_size; + + fault_local->fd = fd_ref (file->fd); + + STACK_WIND (fault_frame, ra_fault_cbk, + FIRST_CHILD (fault_frame->this), + FIRST_CHILD (fault_frame->this)->fops->readv, + file->fd, file->page_size, offset); + return; +} + +void +ra_frame_fill (ra_page_t *page, call_frame_t *frame) +{ + ra_local_t *local = NULL; + ra_fill_t *fill = NULL; + off_t src_offset = 0; + off_t dst_offset = 0; + ssize_t copy_size = 0; + ra_fill_t *new = NULL; + + + local = frame->local; + fill = &local->fill; + + if (local->op_ret != -1 && page->size) { + if (local->offset > page->offset) + src_offset = local->offset - page->offset; + else + dst_offset = page->offset - local->offset; + + copy_size = min (page->size - src_offset, + local->size - dst_offset); + + if (copy_size < 0) { + /* if page contains fewer bytes and the required offset + is beyond the page size in the page */ + copy_size = src_offset = 0; + } + + fill = fill->next; + while (fill != &local->fill) { + if (fill->offset > page->offset) { + break; + } + fill = fill->next; + } + + new = CALLOC (1, sizeof (*new)); + + new->offset = page->offset; + new->size = copy_size; + new->refs = dict_ref (page->ref); + new->count = iov_subset (page->vector, page->count, + src_offset, src_offset+copy_size, + NULL); + new->vector = CALLOC (new->count, sizeof (struct iovec)); + + new->count = iov_subset (page->vector, page->count, + src_offset, src_offset+copy_size, + new->vector); + + new->next = fill; + new->prev = new->next->prev; + new->next->prev = new; + new->prev->next = new; + + local->op_ret += copy_size; + } +} + + +void +ra_frame_unwind (call_frame_t *frame) +{ + ra_local_t *local = NULL; + ra_fill_t *fill = NULL; + int32_t count = 0; + struct iovec *vector; + int32_t copied = 0; + dict_t *refs = NULL; + ra_fill_t *next = NULL; + fd_t *fd = NULL; + ra_file_t *file = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + local = frame->local; + fill = local->fill.next; + + refs = get_new_dict (); + + frame->local = NULL; + + while (fill != &local->fill) { + count += fill->count; + fill = fill->next; + } + + vector = CALLOC (count, sizeof (*vector)); + + fill = local->fill.next; + + while (fill != &local->fill) { + next = fill->next; + + memcpy (((char *)vector) + copied, fill->vector, + fill->count * sizeof (*vector)); + + copied += (fill->count * sizeof (*vector)); + dict_copy (fill->refs, refs); + + fill->next->prev = fill->prev; + fill->prev->next = fill->prev; + + dict_unref (fill->refs); + free (fill->vector); + free (fill); + + fill = next; + } + + frame->root->rsp_refs = dict_ref (refs); + + fd = local->fd; + ret = fd_ctx_get (fd, frame->this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + STACK_UNWIND (frame, local->op_ret, local->op_errno, + vector, count, &file->stbuf); + + dict_unref (refs); + pthread_mutex_destroy (&local->local_lock); + free (local); + free (vector); + + return; +} + +/* + * ra_frame_return - + * @frame: + * + */ +void +ra_frame_return (call_frame_t *frame) +{ + ra_local_t *local = NULL; + int32_t wait_count = 0; + + local = frame->local; + assert (local->wait_count > 0); + + ra_local_lock (local); + { + wait_count = --local->wait_count; + } + ra_local_unlock (local); + + if (!wait_count) + ra_frame_unwind (frame); + + return; +} + +/* + * ra_page_wakeup - + * @page: + * + */ +ra_waitq_t * +ra_page_wakeup (ra_page_t *page) +{ + ra_waitq_t *waitq = NULL, *trav = NULL; + call_frame_t *frame; + + waitq = page->waitq; + page->waitq = NULL; + + trav = waitq; + for (trav = waitq; trav; trav = trav->next) { + frame = trav->data; + ra_frame_fill (page, frame); + } + + return waitq; +} + +/* + * ra_page_purge - + * @page: + * + */ +void +ra_page_purge (ra_page_t *page) +{ + page->prev->next = page->next; + page->next->prev = page->prev; + + if (page->ref) { + dict_unref (page->ref); + } + free (page->vector); + free (page); +} + +/* + * ra_page_error - + * @page: + * @op_ret: + * @op_errno: + * + */ +ra_waitq_t * +ra_page_error (ra_page_t *page, int32_t op_ret, int32_t op_errno) +{ + + ra_waitq_t *waitq = NULL; + ra_waitq_t *trav = NULL; + call_frame_t *frame = NULL; + ra_local_t *local = NULL; + + waitq = page->waitq; + page->waitq = NULL; + + trav = waitq; + for (trav = waitq; trav; trav = trav->next) { + frame = trav->data; + + local = frame->local; + if (local->op_ret != -1) { + local->op_ret = op_ret; + local->op_errno = op_errno; + } + } + + ra_page_purge (page); + + return waitq; +} + +/* + * ra_file_destroy - + * @file: + * + */ +void +ra_file_destroy (ra_file_t *file) +{ + ra_conf_t *conf = NULL; + ra_page_t *trav = NULL; + + conf = file->conf; + + ra_conf_lock (conf); + { + file->prev->next = file->next; + file->next->prev = file->prev; + } + ra_conf_unlock (conf); + + trav = file->pages.next; + while (trav != &file->pages) { + ra_page_error (trav, -1, EINVAL); + trav = file->pages.next; + } + + pthread_mutex_destroy (&file->file_lock); + free (file); +} + diff --git a/xlators/performance/read-ahead/src/read-ahead.c b/xlators/performance/read-ahead/src/read-ahead.c new file mode 100644 index 00000000000..0060e00fd41 --- /dev/null +++ b/xlators/performance/read-ahead/src/read-ahead.c @@ -0,0 +1,890 @@ +/* + Copyright (c) 2006, 2007, 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +/* + TODO: + - handle O_DIRECT + - maintain offset, flush on lseek + - ensure efficient memory managment in case of random seek +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "read-ahead.h" +#include <assert.h> +#include <sys/time.h> + + +static void +read_ahead (call_frame_t *frame, + ra_file_t *file); + + +int +ra_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, fd_t *fd) +{ + ra_conf_t *conf = NULL; + ra_file_t *file = NULL; + int ret = 0; + + conf = this->private; + + if (op_ret == -1) { + goto unwind; + } + + file = CALLOC (1, sizeof (*file)); + if (!file) { + gf_log (this->name, GF_LOG_ERROR, + "out of memory :("); + goto unwind; + } + + ret = fd_ctx_set (fd, this, (uint64_t)(long)file); + + /* If mandatory locking has been enabled on this file, + we disable caching on it */ + + if ((fd->inode->st_mode & S_ISGID) && !(fd->inode->st_mode & S_IXGRP)) + file->disabled = 1; + + /* If O_DIRECT open, we disable caching on it */ + + if ((fd->flags & O_DIRECT) || (fd->flags & O_WRONLY)) + file->disabled = 1; + + file->offset = (unsigned long long) 0; + file->conf = conf; + file->pages.next = &file->pages; + file->pages.prev = &file->pages; + file->pages.offset = (unsigned long long) 0; + file->pages.file = file; + + ra_conf_lock (conf); + { + file->next = conf->files.next; + conf->files.next = file; + file->next->prev = file; + file->prev = &conf->files; + } + ra_conf_unlock (conf); + + file->fd = fd; + file->page_count = conf->page_count; + file->page_size = conf->page_size; + pthread_mutex_init (&file->file_lock, NULL); + + if (!file->disabled) { + file->page_count = 1; + } + +unwind: + STACK_UNWIND (frame, op_ret, op_errno, fd); + + return 0; +} + + +int +ra_create_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, + fd_t *fd, inode_t *inode, struct stat *buf) +{ + ra_conf_t *conf = NULL; + ra_file_t *file = NULL; + int ret = 0; + + conf = this->private; + + if (op_ret == -1) { + goto unwind; + } + + file = CALLOC (1, sizeof (*file)); + if (!file) { + gf_log (this->name, GF_LOG_ERROR, + "out of memory :("); + goto unwind; + } + + ret = fd_ctx_set (fd, this, (uint64_t)(long)file); + + /* If mandatory locking has been enabled on this file, + we disable caching on it */ + + if ((fd->inode->st_mode & S_ISGID) && !(fd->inode->st_mode & S_IXGRP)) + file->disabled = 1; + + /* If O_DIRECT open, we disable caching on it */ + + if ((fd->flags & O_DIRECT) || (fd->flags & O_WRONLY)) + file->disabled = 1; + + file->offset = (unsigned long long) 0; + //file->size = fd->inode->buf.st_size; + file->conf = conf; + file->pages.next = &file->pages; + file->pages.prev = &file->pages; + file->pages.offset = (unsigned long long) 0; + file->pages.file = file; + + ra_conf_lock (conf); + { + file->next = conf->files.next; + conf->files.next = file; + file->next->prev = file; + file->prev = &conf->files; + } + ra_conf_unlock (conf); + + file->fd = fd; + file->page_count = conf->page_count; + file->page_size = conf->page_size; + pthread_mutex_init (&file->file_lock, NULL); + +unwind: + STACK_UNWIND (frame, op_ret, op_errno, fd, inode, buf); + + return 0; +} + + +int +ra_open (call_frame_t *frame, xlator_t *this, + loc_t *loc, int32_t flags, fd_t *fd) +{ + STACK_WIND (frame, ra_open_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->open, + loc, flags, fd); + + return 0; +} + +int +ra_create (call_frame_t *frame, xlator_t *this, + loc_t *loc, int32_t flags, mode_t mode, fd_t *fd) +{ + STACK_WIND (frame, ra_create_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->create, + loc, flags, mode, fd); + + return 0; +} + +/* free cache pages between offset and offset+size, + does not touch pages with frames waiting on it +*/ + +static void +flush_region (call_frame_t *frame, + ra_file_t *file, + off_t offset, + off_t size) +{ + ra_page_t *trav = NULL; + ra_page_t *next = NULL; + + + ra_file_lock (file); + { + trav = file->pages.next; + while (trav != &file->pages + && trav->offset < (offset + size)) { + + next = trav->next; + if (trav->offset >= offset && !trav->waitq) { + ra_page_purge (trav); + } + trav = next; + } + } + ra_file_unlock (file); +} + + + +int +ra_release (xlator_t *this, + fd_t *fd) +{ + uint64_t tmp_file = 0; + int ret = 0; + + ret = fd_ctx_del (fd, this, &tmp_file); + + if (!ret) { + ra_file_destroy ((ra_file_t *)(long)tmp_file); + } + + return 0; +} + + +void +read_ahead (call_frame_t *frame, ra_file_t *file) +{ + off_t ra_offset = 0; + size_t ra_size = 0; + off_t trav_offset = 0; + ra_page_t *trav = NULL; + off_t cap = 0; + char fault = 0; + + if (!file->page_count) + return; + + ra_size = file->page_size * file->page_count; + ra_offset = floor (file->offset, file->page_size); + cap = file->size ? file->size : file->offset + ra_size; + + while (ra_offset < min (file->offset + ra_size, cap)) { + + ra_file_lock (file); + { + trav = ra_page_get (file, ra_offset); + } + ra_file_unlock (file); + + if (!trav) + break; + + ra_offset += file->page_size; + } + + if (trav) + /* comfortable enough */ + return; + + trav_offset = ra_offset; + + trav = file->pages.next; + cap = file->size ? file->size : ra_offset + ra_size; + + while (trav_offset < min(ra_offset + ra_size, cap)) { + fault = 0; + ra_file_lock (file); + { + trav = ra_page_get (file, trav_offset); + if (!trav) { + fault = 1; + trav = ra_page_create (file, trav_offset); + if (trav) + trav->dirty = 1; + } + } + ra_file_unlock (file); + + if (!trav) { + /* OUT OF MEMORY */ + break; + } + + if (fault) { + gf_log (frame->this->name, GF_LOG_DEBUG, + "RA at offset=%"PRId64, trav_offset); + ra_page_fault (file, frame, trav_offset); + } + trav_offset += file->page_size; + } + + return; +} + + +int +ra_need_atime_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct iovec *vector, + int32_t count, struct stat *stbuf) +{ + STACK_DESTROY (frame->root); + return 0; +} + + +static void +dispatch_requests (call_frame_t *frame, + ra_file_t *file) +{ + ra_local_t *local = NULL; + ra_conf_t *conf = NULL; + off_t rounded_offset = 0; + off_t rounded_end = 0; + off_t trav_offset = 0; + ra_page_t *trav = NULL; + call_frame_t *ra_frame = NULL; + char need_atime_update = 1; + char fault = 0; + + + local = frame->local; + conf = file->conf; + + rounded_offset = floor (local->offset, file->page_size); + rounded_end = roof (local->offset + local->size, file->page_size); + + trav_offset = rounded_offset; + trav = file->pages.next; + + while (trav_offset < rounded_end) { + fault = 0; + + ra_file_lock (file); + { + trav = ra_page_get (file, trav_offset); + if (!trav) { + trav = ra_page_create (file, trav_offset); + fault = 1; + need_atime_update = 0; + } + + if (!trav) + goto unlock; + + if (trav->ready) { + gf_log (frame->this->name, GF_LOG_DEBUG, + "HIT at offset=%"PRId64".", + trav_offset); + ra_frame_fill (trav, frame); + } else { + gf_log (frame->this->name, GF_LOG_DEBUG, + "IN-TRANSIT at offset=%"PRId64".", + trav_offset); + ra_wait_on_page (trav, frame); + need_atime_update = 0; + } + } + unlock: + ra_file_unlock (file); + + if (fault) { + gf_log (frame->this->name, GF_LOG_DEBUG, + "MISS at offset=%"PRId64".", + trav_offset); + ra_page_fault (file, frame, trav_offset); + } + + trav_offset += file->page_size; + } + + if (need_atime_update && conf->force_atime_update) { + /* TODO: use untimens() since readv() can confuse underlying + io-cache and others */ + ra_frame = copy_frame (frame); + STACK_WIND (ra_frame, ra_need_atime_cbk, + FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->readv, + file->fd, 1, 1); + } + + return ; +} + + +int +ra_readv_disabled_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, + struct iovec *vector, int32_t count, struct stat *stbuf) +{ + STACK_UNWIND (frame, op_ret, op_errno, vector, count, stbuf); + + return 0; +} + + +int +ra_readv (call_frame_t *frame, xlator_t *this, + fd_t *fd, size_t size, off_t offset) +{ + ra_file_t *file = NULL; + ra_local_t *local = NULL; + ra_conf_t *conf = NULL; + int op_errno = 0; + int ret = 0; + char expected_offset = 1; + uint64_t tmp_file = 0; + + conf = this->private; + + gf_log (this->name, GF_LOG_DEBUG, + "NEW REQ at offset=%"PRId64" for size=%"GF_PRI_SIZET"", + offset, size); + + ret = fd_ctx_get (fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + if (file->offset != offset) { + gf_log (this->name, GF_LOG_DEBUG, + "unexpected offset (%"PRId64" != %"PRId64") resetting", + file->offset, offset); + + expected_offset = file->expected = file->page_count = 0; + } else { + gf_log (this->name, GF_LOG_DEBUG, + "expected offset (%"PRId64") when page_count=%d", + offset, file->page_count); + + if (file->expected < (conf->page_size * conf->page_count)) { + file->expected += size; + file->page_count = min ((file->expected / file->page_size), + conf->page_count); + } + } + + if (!expected_offset) { + flush_region (frame, file, 0, file->pages.prev->offset + 1); + } + + if (file->disabled) { + STACK_WIND (frame, ra_readv_disabled_cbk, + FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->readv, + file->fd, size, offset); + return 0; + } + + local = (void *) CALLOC (1, sizeof (*local)); + if (!local) { + gf_log (this->name, GF_LOG_ERROR, + "out of memory :("); + op_errno = ENOMEM; + goto unwind; + } + + local->fd = fd; + local->offset = offset; + local->size = size; + local->wait_count = 1; + + local->fill.next = &local->fill; + local->fill.prev = &local->fill; + + pthread_mutex_init (&local->local_lock, NULL); + + frame->local = local; + + dispatch_requests (frame, file); + + flush_region (frame, file, 0, floor (offset, file->page_size)); + + read_ahead (frame, file); + + ra_frame_return (frame); + + file->offset = offset + size; + + return 0; + +unwind: + STACK_UNWIND (frame, -1, op_errno, NULL, 0, NULL); + + return 0; +} + + +int +ra_flush_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + + +int +ra_flush (call_frame_t *frame, xlator_t *this, fd_t *fd) +{ + ra_file_t *file = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + ret = fd_ctx_get (fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + if (file) { + flush_region (frame, file, 0, file->pages.prev->offset+1); + } + + STACK_WIND (frame, ra_flush_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->flush, + fd); + return 0; +} + + +int +ra_fsync (call_frame_t *frame, xlator_t *this, fd_t *fd, + int32_t datasync) +{ + ra_file_t *file = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + ret = fd_ctx_get (fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + if (file) { + flush_region (frame, file, 0, file->pages.prev->offset+1); + } + + STACK_WIND (frame, ra_flush_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->fsync, + fd, datasync); + return 0; +} + + +int +ra_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct stat *stbuf) +{ + fd_t *fd = NULL; + ra_file_t *file = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + fd = frame->local; + + ret = fd_ctx_get (fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + if (file) { + flush_region (frame, file, 0, file->pages.prev->offset+1); + } + + frame->local = NULL; + STACK_UNWIND (frame, op_ret, op_errno, stbuf); + return 0; +} + + +int +ra_writev (call_frame_t *frame, xlator_t *this, fd_t *fd, + struct iovec *vector, int32_t count, off_t offset) +{ + ra_file_t *file = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + ret = fd_ctx_get (fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + if (file) { + flush_region (frame, file, 0, file->pages.prev->offset+1); + + /* reset the read-ahead counters too */ + file->expected = file->page_count = 0; + } + + frame->local = fd; + + STACK_WIND (frame, ra_writev_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->writev, + fd, vector, count, offset); + + return 0; +} + + +int +ra_attr_cbk (call_frame_t *frame, void *cookie, xlator_t *this, + int32_t op_ret, int32_t op_errno, struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + + +int +ra_truncate (call_frame_t *frame, xlator_t *this, + loc_t *loc, off_t offset) +{ + ra_file_t *file = NULL; + fd_t *iter_fd = NULL; + inode_t *inode = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + inode = loc->inode; + + LOCK (&inode->lock); + { + list_for_each_entry (iter_fd, &inode->fd_list, inode_list) { + ret = fd_ctx_get (iter_fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + if (!file) + continue; + flush_region (frame, file, 0, + file->pages.prev->offset + 1); + } + } + UNLOCK (&inode->lock); + + STACK_WIND (frame, ra_attr_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->truncate, + loc, offset); + return 0; +} + + +int +ra_fstat (call_frame_t *frame, xlator_t *this, + fd_t *fd) +{ + ra_file_t *file = NULL; + fd_t *iter_fd = NULL; + inode_t *inode = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + inode = fd->inode; + + LOCK (&inode->lock); + { + list_for_each_entry (iter_fd, &inode->fd_list, inode_list) { + ret = fd_ctx_get (iter_fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + if (!file) + continue; + flush_region (frame, file, 0, + file->pages.prev->offset + 1); + } + } + UNLOCK (&inode->lock); + + STACK_WIND (frame, ra_attr_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->fstat, + fd); + return 0; +} + + +int +ra_fchown (call_frame_t *frame, xlator_t *this, + fd_t *fd, uid_t uid, gid_t gid) +{ + ra_file_t *file = NULL; + fd_t *iter_fd = NULL; + inode_t *inode = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + inode = fd->inode; + + LOCK (&inode->lock); + { + list_for_each_entry (iter_fd, &inode->fd_list, inode_list) { + ret = fd_ctx_get (iter_fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + + if (!file) + continue; + flush_region (frame, file, 0, + file->pages.prev->offset + 1); + } + } + UNLOCK (&inode->lock); + + STACK_WIND (frame, ra_attr_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->fchown, + fd, uid, gid); + return 0; +} + + +int +ra_ftruncate (call_frame_t *frame, xlator_t *this, + fd_t *fd, off_t offset) +{ + ra_file_t *file = NULL; + fd_t *iter_fd = NULL; + inode_t *inode = NULL; + int ret = 0; + uint64_t tmp_file = 0; + + inode = fd->inode; + + LOCK (&inode->lock); + { + list_for_each_entry (iter_fd, &inode->fd_list, inode_list) { + ret = fd_ctx_get (iter_fd, this, &tmp_file); + file = (ra_file_t *)(long)tmp_file; + if (!file) + continue; + flush_region (frame, file, 0, + file->pages.prev->offset + 1); + } + } + UNLOCK (&inode->lock); + + STACK_WIND (frame, ra_attr_cbk, + FIRST_CHILD (this), + FIRST_CHILD (this)->fops->ftruncate, + fd, offset); + return 0; +} + + +int +init (xlator_t *this) +{ + ra_conf_t *conf; + dict_t *options = this->options; + char *page_size_string = NULL; + char *page_count_string = NULL; + + if (!this->children || this->children->next) { + gf_log (this->name, GF_LOG_ERROR, + "FATAL: read-ahead not configured with exactly one child"); + return -1; + } + + if (!this->parents) { + gf_log (this->name, GF_LOG_WARNING, + "dangling volume. check volfile "); + } + + conf = (void *) CALLOC (1, sizeof (*conf)); + ERR_ABORT (conf); + conf->page_size = 256 * 1024; + conf->page_count = 2; + + if (dict_get (options, "page-size")) + page_size_string = data_to_str (dict_get (options, + "page-size")); + if (page_size_string) + { + if (gf_string2bytesize (page_size_string, &conf->page_size) != 0) + { + gf_log ("read-ahead", + GF_LOG_ERROR, + "invalid number format \"%s\" of \"option page-size\"", + page_size_string); + return -1; + } + + gf_log (this->name, GF_LOG_DEBUG, "Using conf->page_size = %"PRIu64"", + conf->page_size); + } + + if (dict_get (options, "page-count")) + page_count_string = data_to_str (dict_get (options, + "page-count")); + if (page_count_string) + { + if (gf_string2uint_base10 (page_count_string, &conf->page_count) != 0) + { + gf_log ("read-ahead", + GF_LOG_ERROR, + "invalid number format \"%s\" of \"option page-count\"", + page_count_string); + return -1; + } + gf_log (this->name, GF_LOG_DEBUG, "Using conf->page_count = %u", + conf->page_count); + } + + if (dict_get (options, "force-atime-update")) { + char *force_atime_update_str = data_to_str (dict_get (options, + "force-atime-update")); + if (gf_string2boolean (force_atime_update_str, &conf->force_atime_update) == -1) { + gf_log (this->name, GF_LOG_ERROR, + "'force-atime-update' takes only boolean options"); + return -1; + } + if (conf->force_atime_update) + gf_log (this->name, GF_LOG_DEBUG, "Forcing atime updates on cache hit"); + } + + conf->files.next = &conf->files; + conf->files.prev = &conf->files; + + pthread_mutex_init (&conf->conf_lock, NULL); + this->private = conf; + return 0; +} + +void +fini (xlator_t *this) +{ + ra_conf_t *conf = this->private; + + pthread_mutex_destroy (&conf->conf_lock); + FREE (conf); + + this->private = NULL; + return; +} + +struct xlator_fops fops = { + .open = ra_open, + .create = ra_create, + .readv = ra_readv, + .writev = ra_writev, + .flush = ra_flush, + .fsync = ra_fsync, + .truncate = ra_truncate, + .ftruncate = ra_ftruncate, + .fstat = ra_fstat, + .fchown = ra_fchown, +}; + +struct xlator_mops mops = { +}; + +struct xlator_cbks cbks = { + .release = ra_release, +}; + +struct volume_options options[] = { + { .key = {"force-atime-update"}, + .type = GF_OPTION_TYPE_BOOL + }, + { .key = {"page-size"}, + .type = GF_OPTION_TYPE_SIZET, + .min = 64 * GF_UNIT_KB, + .max = 2 * GF_UNIT_MB + }, + { .key = {"page-count"}, + .type = GF_OPTION_TYPE_INT, + .min = 1, + .max = 16 + }, + { .key = {NULL} }, +}; diff --git a/xlators/performance/read-ahead/src/read-ahead.h b/xlators/performance/read-ahead/src/read-ahead.h new file mode 100644 index 00000000000..d624ca8abc8 --- /dev/null +++ b/xlators/performance/read-ahead/src/read-ahead.h @@ -0,0 +1,194 @@ +/* + Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef __READ_AHEAD_H +#define __READ_AHEAD_H + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + + +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "common-utils.h" + +struct ra_conf; +struct ra_local; +struct ra_page; +struct ra_file; +struct ra_waitq; + + +struct ra_waitq { + struct ra_waitq *next; + void *data; +}; + + +struct ra_fill { + struct ra_fill *next; + struct ra_fill *prev; + off_t offset; + size_t size; + struct iovec *vector; + int32_t count; + dict_t *refs; +}; + + +struct ra_local { + mode_t mode; + struct ra_fill fill; + off_t offset; + size_t size; + int32_t op_ret; + int32_t op_errno; + off_t pending_offset; + size_t pending_size; + fd_t *fd; + int32_t wait_count; + pthread_mutex_t local_lock; +}; + + +struct ra_page { + struct ra_page *next; + struct ra_page *prev; + struct ra_file *file; + char dirty; + char ready; + struct iovec *vector; + int32_t count; + off_t offset; + size_t size; + struct ra_waitq *waitq; + dict_t *ref; +}; + + +struct ra_file { + struct ra_file *next; + struct ra_file *prev; + struct ra_conf *conf; + fd_t *fd; + int disabled; + size_t expected; + struct ra_page pages; + off_t offset; + size_t size; + int32_t refcount; + pthread_mutex_t file_lock; + struct stat stbuf; + uint64_t page_size; + uint32_t page_count; +}; + + +struct ra_conf { + uint64_t page_size; + uint32_t page_count; + void *cache_block; + struct ra_file files; + gf_boolean_t force_atime_update; + pthread_mutex_t conf_lock; +}; + + +typedef struct ra_conf ra_conf_t; +typedef struct ra_local ra_local_t; +typedef struct ra_page ra_page_t; +typedef struct ra_file ra_file_t; +typedef struct ra_waitq ra_waitq_t; +typedef struct ra_fill ra_fill_t; + +ra_page_t * +ra_page_get (ra_file_t *file, + off_t offset); +ra_page_t * +ra_page_create (ra_file_t *file, + off_t offset); +void +ra_page_fault (ra_file_t *file, + call_frame_t *frame, + off_t offset); +void +ra_wait_on_page (ra_page_t *page, + call_frame_t *frame); +ra_waitq_t * +ra_page_wakeup (ra_page_t *page); + +void +ra_page_flush (ra_page_t *page); + +ra_waitq_t * +ra_page_error (ra_page_t *page, + int32_t op_ret, + int32_t op_errno); +void +ra_page_purge (ra_page_t *page); + +void +ra_frame_return (call_frame_t *frame); +void +ra_frame_fill (ra_page_t *page, + call_frame_t *frame); + +void +ra_file_destroy (ra_file_t *file); + +static inline void +ra_file_lock (ra_file_t *file) +{ + pthread_mutex_lock (&file->file_lock); +} + +static inline void +ra_file_unlock (ra_file_t *file) +{ + pthread_mutex_unlock (&file->file_lock); +} + +static inline void +ra_conf_lock (ra_conf_t *conf) +{ + pthread_mutex_lock (&conf->conf_lock); +} + +static inline void +ra_conf_unlock (ra_conf_t *conf) +{ + pthread_mutex_unlock (&conf->conf_lock); +} +static inline void +ra_local_lock (ra_local_t *local) +{ + pthread_mutex_lock (&local->local_lock); +} + +static inline void +ra_local_unlock (ra_local_t *local) +{ + pthread_mutex_unlock (&local->local_lock); +} + +#endif /* __READ_AHEAD_H */ diff --git a/xlators/performance/stat-prefetch/Makefile.am b/xlators/performance/stat-prefetch/Makefile.am new file mode 100644 index 00000000000..af437a64d6d --- /dev/null +++ b/xlators/performance/stat-prefetch/Makefile.am @@ -0,0 +1 @@ +SUBDIRS = src diff --git a/xlators/performance/stat-prefetch/src/Makefile.am b/xlators/performance/stat-prefetch/src/Makefile.am new file mode 100644 index 00000000000..e52f2df48fd --- /dev/null +++ b/xlators/performance/stat-prefetch/src/Makefile.am @@ -0,0 +1,11 @@ +xlator_PROGRAMS = stat-prefetch.so +xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance + +stat_prefetch_so_SOURCES = stat-prefetch.c +noinst_HEADERS = stat-prefetch.h + +AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall \ + -I$(top_srcdir)/libglusterfs/src -shared -nostartfiles + +CLEANFILES = + diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.c b/xlators/performance/stat-prefetch/src/stat-prefetch.c new file mode 100644 index 00000000000..f2a78f676f9 --- /dev/null +++ b/xlators/performance/stat-prefetch/src/stat-prefetch.c @@ -0,0 +1,508 @@ +/* + Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "glusterfs.h" +#include "stat-prefetch.h" +#include "dict.h" +#include "xlator.h" +#include <sys/time.h> + +struct sp_cache { + struct sp_cache *next; + struct sp_cache *prev; + pid_t pid; + long long tv_time; + char *dirname; + dir_entry_t entries; + int32_t count; + pthread_mutex_t lock; +}; + +static void +stat_prefetch_cache_flush (struct sp_cache *cache, int32_t force) +{ + struct sp_cache *trav; + struct timeval tv; + long long tv_time; + + gettimeofday (&tv, NULL); + tv_time = (tv.tv_usec + (tv.tv_sec * 1000000)); + + pthread_mutex_lock (&cache->lock); + + trav = cache->next; + while (trav != cache) { + struct sp_cache *next = trav->next; + { + if (tv_time > trav->tv_time || force) { + gf_log ("stat-prefetch", + GF_LOG_DEBUG, + "flush on: %s", + trav->dirname); + dir_entry_t *entries; + + trav->prev->next = trav->next; + trav->next->prev = trav->prev; + + entries = trav->entries.next; + + while (entries) { + dir_entry_t *nextentry = entries->next; + { + free (entries->name); + free (entries); + } + entries = nextentry; + } + free (trav->dirname); + free (trav); + } + } + trav = next; + } + + pthread_mutex_unlock (&cache->lock); +} + +static int32_t +stat_prefetch_cache_fill (struct sp_cache *cache, + pid_t pid, + char *dirname, + dir_entry_t *entries) +{ + struct sp_cache *trav; + struct timeval tv; + + pthread_mutex_unlock (&cache->lock); + trav = cache->next; + while (trav != cache) { + // if (trav->pid == pid && !strcmp (trav->dirname, dirname)) { + if (!strcmp (trav->dirname, dirname)) { + break; + } + trav = trav->next; + } + + if (trav == cache) { + trav = CALLOC (1, sizeof (*trav)); + ERR_ABORT (trav); + trav->pid = pid; + trav->dirname = dirname; + + trav->prev = cache->prev; + trav->next = cache; + trav->next->prev = trav; + trav->prev->next = trav; + } else { + free (dirname); + } + + while (trav->entries.next) { + dir_entry_t *tmp = trav->entries.next; + + trav->entries.next = trav->entries.next->next; + free (tmp->name); + free (tmp); + } + trav->entries.next = entries->next; + entries->next = NULL; + + gettimeofday (&tv, NULL); + trav->tv_time = (tv.tv_usec + (tv.tv_sec * 1000000)) + cache->tv_time; + + pthread_mutex_unlock (&cache->lock); + return 0; +} + +static int32_t +stat_prefetch_cache_lookup (struct sp_cache *cache, + pid_t pid, + const char *path, + struct stat *buf) +{ + struct sp_cache *trav; + char *dirname = strdup (path); + char *filename = strrchr (dirname, '/'); + dir_entry_t *entries; + dir_entry_t *prev = NULL; + + *filename = '\0'; + filename ++; + + pthread_mutex_lock (&cache->lock); + trav = cache->next; + while (trav != cache) { + // if ((trav->pid == pid) && !strcmp (dirname, trav->dirname)) + if (!strcmp (dirname, trav->dirname)) + break; + trav = trav->next; + } + if (trav == cache) { + free (dirname); + pthread_mutex_unlock (&cache->lock); + return -1; + } + + entries = trav->entries.next; + prev = &trav->entries; + while (entries) { + if (!strcmp (entries->name, filename)) + break; + prev = entries; + entries = entries->next; + } + if (!entries) { + free (dirname); + pthread_mutex_unlock (&cache->lock); + return -1; + } + + *buf = entries->buf; + prev->next = entries->next; + free (entries->name); + free (entries); + free (dirname); + + pthread_mutex_unlock (&cache->lock); + + return 0; +} + + +int32_t +stat_prefetch_readdir_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + dir_entry_t *entries, + int32_t count) +{ + char *path = frame->local; + pid_t pid = frame->root->pid; + frame->local = NULL; + + STACK_UNWIND (frame, op_ret, op_errno, entries, count); + + if (op_ret == 0) + stat_prefetch_cache_fill (this->private, + pid, + path, + entries); + else + free (path); + + return 0; +} + +int32_t +stat_prefetch_readdir (call_frame_t *frame, + xlator_t *this, + const char *path) +{ + stat_prefetch_cache_flush (this->private, 0); + + frame->local = strdup (path); + STACK_WIND (frame, + stat_prefetch_readdir_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readdir, + path); + return 0; +} + + +int32_t +stat_prefetch_getattr_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +int32_t +stat_prefetch_getattr (call_frame_t *frame, + struct xlator *this, + const char *path) +{ + struct stat buf; + pid_t pid = frame->root->pid; + stat_prefetch_cache_flush (this->private, 0); + + if (stat_prefetch_cache_lookup (this->private, + pid, + path, + &buf) == 0) { + STACK_UNWIND (frame, 0, 0, &buf); + return 0; + } + + STACK_WIND (frame, + stat_prefetch_getattr_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->getattr, + path); + + return 0; +} + + +int32_t +stat_prefetch_unlink_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + +int32_t +stat_prefetch_unlink (call_frame_t *frame, + struct xlator *this, + const char *path) +{ + stat_prefetch_cache_flush (this->private, 1); + + STACK_WIND (frame, + stat_prefetch_unlink_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->unlink, + path); + + return 0; +} + + +int32_t +stat_prefetch_chmod_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +int32_t +stat_prefetch_chmod (call_frame_t *frame, + struct xlator *this, + const char *path, + mode_t mode) +{ + stat_prefetch_cache_flush (this->private, 1); + + STACK_WIND (frame, + stat_prefetch_chmod_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->chmod, + path, + mode); + + return 0; +} + + +int32_t +stat_prefetch_chown_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +int32_t +stat_prefetch_chown (call_frame_t *frame, + struct xlator *this, + const char *path, + uid_t uid, + gid_t gid) +{ + stat_prefetch_cache_flush (this->private, 1); + + STACK_WIND (frame, + stat_prefetch_chown_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->chown, + path, + uid, + gid); + + return 0; +} + + +int32_t +stat_prefetch_utimes_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +int32_t +stat_prefetch_utimes (call_frame_t *frame, + struct xlator *this, + const char *path, + struct timespec *tvp) +{ + stat_prefetch_cache_flush (this->private, 1); + + STACK_WIND (frame, + stat_prefetch_utimes_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->utimes, + path, + tvp); + + return 0; +} + + +int32_t +stat_prefetch_truncate_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + +int32_t +stat_prefetch_truncate (call_frame_t *frame, + struct xlator *this, + const char *path, + off_t offset) +{ + stat_prefetch_cache_flush (this->private, 1); + + STACK_WIND (frame, + stat_prefetch_truncate_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->truncate, + path, + offset); + + return 0; +} + + +int32_t +stat_prefetch_rename_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + +int32_t +stat_prefetch_rename (call_frame_t *frame, + struct xlator *this, + const char *oldpath, + const char *newpath) +{ + stat_prefetch_cache_flush (this->private, 1); + + STACK_WIND (frame, + stat_prefetch_rename_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->rename, + oldpath, + newpath); + + return 0; +} + +int32_t +init (struct xlator *this) +{ + struct sp_cache *cache; + dict_t *options = this->options; + + if (!this->children || this->children->next) { + gf_log ("stat-prefetch", + GF_LOG_ERROR, + "FATAL: translator %s does not have exactly one child node", + this->name); + return -1; + } + + cache = (void *) CALLOC (1, sizeof (*cache)); + ERR_ABORT (cache); + cache->next = cache->prev = cache; + + cache->tv_time = 1 * 1000000; + + if (dict_get (options, "cache-seconds")) { + cache->tv_time = (data_to_int64 (dict_get (options, "cache-seconds")) * + 1000000); + } + + pthread_mutex_init (&cache->lock, NULL); + + this->private = cache; + return 0; +} + +void +fini (struct xlator *this) +{ + return; +} + + +struct xlator_fops fops = { + .getattr = stat_prefetch_getattr, + .readdir = stat_prefetch_readdir, + .unlink = stat_prefetch_unlink, + .chmod = stat_prefetch_chmod, + .chown = stat_prefetch_chown, + .rename = stat_prefetch_rename, + .utimes = stat_prefetch_utimes, + .truncate = stat_prefetch_truncate, +}; + +struct xlator_mops mops = { +}; diff --git a/xlators/performance/stat-prefetch/src/stat-prefetch.h b/xlators/performance/stat-prefetch/src/stat-prefetch.h new file mode 100644 index 00000000000..7d9645a2a81 --- /dev/null +++ b/xlators/performance/stat-prefetch/src/stat-prefetch.h @@ -0,0 +1,32 @@ +/* + Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +#ifndef _STAT_PREFETCH_H_ +#define _STAT_PREFETCH_H_ + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include <stdio.h> +#include <sys/time.h> +#include "xlator.h" + +#endif /* _STAT_PREFETCH_H_ */ diff --git a/xlators/performance/symlink-cache/Makefile.am b/xlators/performance/symlink-cache/Makefile.am new file mode 100644 index 00000000000..d471a3f9243 --- /dev/null +++ b/xlators/performance/symlink-cache/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = src + +CLEANFILES = diff --git a/xlators/performance/symlink-cache/src/Makefile.am b/xlators/performance/symlink-cache/src/Makefile.am new file mode 100644 index 00000000000..b8b257c186c --- /dev/null +++ b/xlators/performance/symlink-cache/src/Makefile.am @@ -0,0 +1,12 @@ +xlator_LTLIBRARIES = symlink-cache.la +xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance + +symlink_cache_la_LDFLAGS = -module -avoidversion + +symlink_cache_la_SOURCES = symlink-cache.c +symlink_cache_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la + +AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\ + -I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS) + +CLEANFILES = diff --git a/xlators/performance/symlink-cache/src/symlink-cache.c b/xlators/performance/symlink-cache/src/symlink-cache.c new file mode 100644 index 00000000000..fc207a6272e --- /dev/null +++ b/xlators/performance/symlink-cache/src/symlink-cache.c @@ -0,0 +1,399 @@ +/* + Copyright (c) 2008 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "list.h" +#include "compat.h" +#include "compat-errno.h" +#include "common-utils.h" + +struct symlink_cache { + time_t ctime; + char *readlink; +}; + + +static int +symlink_inode_ctx_get (inode_t *inode, xlator_t *this, void **ctx) +{ + int ret = 0; + uint64_t tmp_ctx = 0; + ret = inode_ctx_get (inode, this, &tmp_ctx); + if (-1 == ret) + gf_log (this->name, GF_LOG_ERROR, "dict get failed"); + else + *ctx = (void *)(long)tmp_ctx; + + return 0; +} + + +static int +symlink_inode_ctx_set (inode_t *inode, xlator_t *this, void *ctx) +{ + int ret = 0; + ret = inode_ctx_put (inode, this, (uint64_t)(long) ctx); + if (-1 == ret) + gf_log (this->name, GF_LOG_ERROR, "dict set failed"); + + return 0; +} + + +int +sc_cache_update (xlator_t *this, inode_t *inode, const char *link) +{ + struct symlink_cache *sc = NULL; + + symlink_inode_ctx_get (inode, this, VOID(&sc)); + if (!sc) + return 0; + + if (!sc->readlink) { + gf_log (this->name, GF_LOG_DEBUG, + "updating cache: %s", link); + + sc->readlink = strdup (link); + } else { + gf_log (this->name, GF_LOG_DEBUG, + "not updating existing cache: %s with %s", + sc->readlink, link); + } + + return 0; +} + + +int +sc_cache_set (xlator_t *this, inode_t *inode, struct stat *buf, + const char *link) +{ + struct symlink_cache *sc = NULL; + int ret = -1; + int need_set = 0; + + + symlink_inode_ctx_get (inode, this, VOID(&sc)); + if (!sc) { + need_set = 1; + sc = CALLOC (1, sizeof (*sc)); + if (!sc) { + gf_log (this->name, GF_LOG_ERROR, + "out of memory :("); + goto err; + } + } + + if (sc->readlink) { + gf_log (this->name, GF_LOG_DEBUG, + "replacing old cache: %s with new cache: %s", + sc->readlink, link); + FREE (sc->readlink); + sc->readlink = NULL; + } + + if (link) { + sc->readlink = strdup (link); + if (!sc->readlink) { + gf_log (this->name, GF_LOG_ERROR, + "out of memory :("); + goto err; + } + } + + sc->ctime = buf->st_ctime; + + gf_log (this->name, GF_LOG_DEBUG, + "setting symlink cache: %s", link); + + if (need_set) { + ret = symlink_inode_ctx_set (inode, this, sc); + + if (ret < 0) { + gf_log (this->name, GF_LOG_ERROR, + "could not set inode context (%s)", + strerror (-ret)); + goto err; + } + } + + return 0; +err: + + if (sc) { + if (sc->readlink) + FREE (sc->readlink); + sc->readlink = NULL; + FREE (sc); + } + + return -1; +} + + +int +sc_cache_flush (xlator_t *this, inode_t *inode) +{ + struct symlink_cache *sc = NULL; + + symlink_inode_ctx_get (inode, this, VOID(&sc)); + if (!sc) + return 0; + + if (sc->readlink) { + gf_log (this->name, GF_LOG_DEBUG, + "flushing cache: %s", sc->readlink); + + FREE (sc->readlink); + sc->readlink = NULL; + } + + FREE (sc); + + return 0; +} + + +int +sc_cache_validate (xlator_t *this, inode_t *inode, struct stat *buf) +{ + struct symlink_cache *sc = NULL; + uint64_t tmp_sc = 0; + + if (!S_ISLNK (buf->st_mode)) { + sc_cache_flush (this, inode); + return 0; + } + + symlink_inode_ctx_get (inode, this, VOID(&sc)); + + if (!sc) { + sc_cache_set (this, inode, buf, NULL); + inode_ctx_get (inode, this, &tmp_sc); + + if (!sc) { + gf_log (this->name, GF_LOG_ERROR, + "out of memory :("); + return 0; + } + sc = (struct symlink_cache *)(long)tmp_sc; + } + + if (sc->ctime == buf->st_ctime) + return 0; + + /* STALE */ + if (sc->readlink) { + gf_log (this->name, GF_LOG_DEBUG, + "flushing cache: %s", sc->readlink); + + FREE (sc->readlink); + sc->readlink = NULL; + } + + sc->ctime = buf->st_ctime; + + return 0; +} + + + +int +sc_cache_get (xlator_t *this, inode_t *inode, char **link) +{ + struct symlink_cache *sc = NULL; + + symlink_inode_ctx_get (inode, this, VOID(&sc)); + + if (!sc) + return 0; + + if (link && sc->readlink) + *link = strdup (sc->readlink); + return 0; +} + + +int +sc_readlink_cbk (call_frame_t *frame, void *cookie, + xlator_t *this, int op_ret, int op_errno, + const char *link) +{ + if (op_ret > 0) + sc_cache_update (this, frame->local, link); + + inode_unref (frame->local); + frame->local = NULL; + + STACK_UNWIND (frame, op_ret, op_errno, link); + return 0; +} + + +int +sc_readlink (call_frame_t *frame, xlator_t *this, + loc_t *loc, size_t size) +{ + char *link = NULL; + + sc_cache_get (this, loc->inode, &link); + + if (link) { + /* cache hit */ + gf_log (this->name, GF_LOG_DEBUG, + "cache hit %s -> %s", + loc->path, link); + STACK_UNWIND (frame, strlen (link) + 1, 0, link); + FREE (link); + return 0; + } + + frame->local = inode_ref (loc->inode); + + STACK_WIND (frame, sc_readlink_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readlink, + loc, size); + + return 0; +} + + +int +sc_symlink_cbk (call_frame_t *frame, void *cookie, + xlator_t *this, int op_ret, int op_errno, + inode_t *inode, struct stat *buf) +{ + if (op_ret == 0) { + if (frame->local) { + sc_cache_set (this, inode, buf, frame->local); + } + } + + STACK_UNWIND (frame, op_ret, op_errno, inode, buf); + return 0; +} + + +int +sc_symlink (call_frame_t *frame, xlator_t *this, + const char *dst, loc_t *src) +{ + frame->local = strdup (dst); + + STACK_WIND (frame, sc_symlink_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->symlink, + dst, src); + + return 0; +} + + +int +sc_lookup_cbk (call_frame_t *frame, void *cookie, + xlator_t *this, int op_ret, int op_errno, + inode_t *inode, struct stat *buf, dict_t *xattr) +{ + if (op_ret == 0) + sc_cache_validate (this, inode, buf); + else + sc_cache_flush (this, inode); + + STACK_UNWIND (frame, op_ret, op_errno, inode, buf, xattr); + return 0; +} + + +int +sc_lookup (call_frame_t *frame, xlator_t *this, + loc_t *loc, dict_t *xattr_req) +{ + STACK_WIND (frame, sc_lookup_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->lookup, + loc, xattr_req); + + return 0; +} + + +int +sc_forget (xlator_t *this, + inode_t *inode) +{ + sc_cache_flush (this, inode); + + return 0; +} + + +int32_t +init (xlator_t *this) +{ + + if (!this->children || this->children->next) + { + gf_log (this->name, GF_LOG_ERROR, + "FATAL: volume (%s) not configured with exactly one " + "child", this->name); + return -1; + } + + if (!this->parents) { + gf_log (this->name, GF_LOG_WARNING, + "dangling volume. check volfile "); + } + + return 0; +} + + +void +fini (xlator_t *this) +{ + return; +} + + +struct xlator_fops fops = { + .lookup = sc_lookup, + .symlink = sc_symlink, + .readlink = sc_readlink, +}; + +struct xlator_mops mops = { +}; + +struct xlator_cbks cbks = { + .forget = sc_forget, +}; + +struct volume_options options[] = { + { .key = {NULL} }, +}; diff --git a/xlators/performance/write-behind/Makefile.am b/xlators/performance/write-behind/Makefile.am new file mode 100644 index 00000000000..d471a3f9243 --- /dev/null +++ b/xlators/performance/write-behind/Makefile.am @@ -0,0 +1,3 @@ +SUBDIRS = src + +CLEANFILES = diff --git a/xlators/performance/write-behind/src/Makefile.am b/xlators/performance/write-behind/src/Makefile.am new file mode 100644 index 00000000000..f800abad50d --- /dev/null +++ b/xlators/performance/write-behind/src/Makefile.am @@ -0,0 +1,12 @@ +xlator_LTLIBRARIES = write-behind.la +xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance + +write_behind_la_LDFLAGS = -module -avoidversion + +write_behind_la_SOURCES = write-behind.c +write_behind_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la + +AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS)\ + -I$(top_srcdir)/libglusterfs/src -shared -nostartfiles $(GF_CFLAGS) + +CLEANFILES = diff --git a/xlators/performance/write-behind/src/write-behind.c b/xlators/performance/write-behind/src/write-behind.c new file mode 100644 index 00000000000..04a447d49e9 --- /dev/null +++ b/xlators/performance/write-behind/src/write-behind.c @@ -0,0 +1,1444 @@ +/* + Copyright (c) 2006, 2007, 2008, 2009 Z RESEARCH, Inc. <http://www.zresearch.com> + This file is part of GlusterFS. + + GlusterFS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3 of the License, + or (at your option) any later version. + + GlusterFS is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see + <http://www.gnu.org/licenses/>. +*/ + +/*TODO: check for non null wb_file_data before getting wb_file */ + + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#include "glusterfs.h" +#include "logging.h" +#include "dict.h" +#include "xlator.h" +#include "list.h" +#include "compat.h" +#include "compat-errno.h" +#include "common-utils.h" + +#define MAX_VECTOR_COUNT 8 + +typedef struct list_head list_head_t; +struct wb_conf; +struct wb_page; +struct wb_file; + + +struct wb_conf { + uint64_t aggregate_size; + uint64_t window_size; + uint64_t disable_till; + gf_boolean_t enable_O_SYNC; + gf_boolean_t flush_behind; +}; + + +typedef struct wb_local { + list_head_t winds; + struct wb_file *file; + list_head_t unwind_frames; + int op_ret; + int op_errno; + call_frame_t *frame; +} wb_local_t; + + +typedef struct write_request { + call_frame_t *frame; + off_t offset; + /* int32_t op_ret; + int32_t op_errno; */ + struct iovec *vector; + int32_t count; + dict_t *refs; + char write_behind; + char stack_wound; + char got_reply; + list_head_t list; + list_head_t winds; + /* list_head_t unwinds;*/ +} wb_write_request_t; + + +struct wb_file { + int disabled; + uint64_t disable_till; + off_t offset; + size_t window_size; + int32_t refcount; + int32_t op_ret; + int32_t op_errno; + list_head_t request; + fd_t *fd; + gf_lock_t lock; + xlator_t *this; +}; + + +typedef struct wb_conf wb_conf_t; +typedef struct wb_page wb_page_t; +typedef struct wb_file wb_file_t; + + +int32_t +wb_process_queue (call_frame_t *frame, wb_file_t *file, char flush_all); + +int32_t +wb_sync (call_frame_t *frame, wb_file_t *file, list_head_t *winds); + +int32_t +wb_sync_all (call_frame_t *frame, wb_file_t *file); + +int32_t +__wb_mark_winds (list_head_t *list, list_head_t *winds, size_t aggregate_size); + + +wb_file_t * +wb_file_create (xlator_t *this, + fd_t *fd) +{ + wb_file_t *file = NULL; + wb_conf_t *conf = this->private; + + file = CALLOC (1, sizeof (*file)); + INIT_LIST_HEAD (&file->request); + + /* fd_ref() not required, file should never decide the existance of + * an fd */ + file->fd= fd; + file->disable_till = conf->disable_till; + file->this = this; + file->refcount = 1; + + fd_ctx_set (fd, this, (uint64_t)(long)file); + + return file; +} + +void +wb_file_destroy (wb_file_t *file) +{ + int32_t refcount = 0; + + LOCK (&file->lock); + { + refcount = --file->refcount; + } + UNLOCK (&file->lock); + + if (!refcount){ + LOCK_DESTROY (&file->lock); + FREE (file); + } + + return; +} + + +int32_t +wb_sync_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *stbuf) +{ + wb_local_t *local = NULL; + list_head_t *winds = NULL; + wb_file_t *file = NULL; + wb_write_request_t *request = NULL, *dummy = NULL; + + local = frame->local; + winds = &local->winds; + file = local->file; + + LOCK (&file->lock); + { + list_for_each_entry_safe (request, dummy, winds, winds) { + request->got_reply = 1; + if (!request->write_behind && (op_ret == -1)) { + wb_local_t *per_request_local = request->frame->local; + per_request_local->op_ret = op_ret; + per_request_local->op_errno = op_errno; + } + + /* + request->op_ret = op_ret; + request->op_errno = op_errno; + */ + } + } + UNLOCK (&file->lock); + + if (op_ret == -1) + { + file->op_ret = op_ret; + file->op_errno = op_errno; + } + + wb_process_queue (frame, file, 0); + + /* safe place to do fd_unref */ + fd_unref (file->fd); + + STACK_DESTROY (frame->root); + + return 0; +} + +int32_t +wb_sync_all (call_frame_t *frame, wb_file_t *file) +{ + list_head_t winds; + int32_t bytes = 0; + + INIT_LIST_HEAD (&winds); + + LOCK (&file->lock); + { + bytes = __wb_mark_winds (&file->request, &winds, 0); + } + UNLOCK (&file->lock); + + wb_sync (frame, file, &winds); + + return bytes; +} + + +int32_t +wb_sync (call_frame_t *frame, wb_file_t *file, list_head_t *winds) +{ + wb_write_request_t *dummy = NULL, *request = NULL, *first_request = NULL, *next = NULL; + size_t total_count = 0, count = 0; + size_t copied = 0; + call_frame_t *sync_frame = NULL; + dict_t *refs = NULL; + wb_local_t *local = NULL; + struct iovec *vector = NULL; + int32_t bytes = 0; + size_t bytecount = 0; + + list_for_each_entry (request, winds, winds) + { + total_count += request->count; + bytes += iov_length (request->vector, request->count); + } + + if (!total_count) { + return 0; + } + + list_for_each_entry_safe (request, dummy, winds, winds) { + if (!vector) { + vector = MALLOC (VECTORSIZE (MAX_VECTOR_COUNT)); + refs = get_new_dict (); + + local = CALLOC (1, sizeof (*local)); + INIT_LIST_HEAD (&local->winds); + + first_request = request; + } + + count += request->count; + bytecount = VECTORSIZE (request->count); + memcpy (((char *)vector)+copied, + request->vector, + bytecount); + copied += bytecount; + + if (request->refs) { + dict_copy (request->refs, refs); + } + + next = NULL; + if (request->winds.next != winds) { + next = list_entry (request->winds.next, struct write_request, winds); + } + + list_del_init (&request->winds); + list_add_tail (&request->winds, &local->winds); + + if (!next || ((count + next->count) > MAX_VECTOR_COUNT)) { + sync_frame = copy_frame (frame); + sync_frame->local = local; + local->file = file; + sync_frame->root->req_refs = dict_ref (refs); + fd_ref (file->fd); + STACK_WIND (sync_frame, + wb_sync_cbk, + FIRST_CHILD(sync_frame->this), + FIRST_CHILD(sync_frame->this)->fops->writev, + file->fd, vector, + count, first_request->offset); + + dict_unref (refs); + FREE (vector); + first_request = NULL; + refs = NULL; + vector = NULL; + copied = count = 0; + } + } + + return bytes; +} + + +int32_t +wb_stat_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + wb_local_t *local = NULL; + + local = frame->local; + + if (local->file) + fd_unref (local->file->fd); + + STACK_UNWIND (frame, op_ret, op_errno, buf); + + return 0; +} + + +int32_t +wb_stat (call_frame_t *frame, + xlator_t *this, + loc_t *loc) +{ + wb_file_t *file = NULL; + fd_t *iter_fd = NULL; + wb_local_t *local = NULL; + uint64_t tmp_file = 0; + + if (loc->inode) + { + iter_fd = fd_lookup (loc->inode, frame->root->pid); + if (iter_fd) { + if (!fd_ctx_get (iter_fd, this, &tmp_file)) { + file = (wb_file_t *)(long)tmp_file; + } else { + fd_unref (iter_fd); + } + } + if (file) { + wb_sync_all (frame, file); + } + } + + local = CALLOC (1, sizeof (*local)); + local->file = file; + + frame->local = local; + + STACK_WIND (frame, wb_stat_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->stat, + loc); + return 0; +} + + +int32_t +wb_fstat (call_frame_t *frame, + xlator_t *this, + fd_t *fd) +{ + wb_file_t *file = NULL; + wb_local_t *local = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, "returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD, NULL); + return 0; + } + + file = (wb_file_t *)(long)tmp_file; + if (file) { + fd_ref (file->fd); + wb_sync_all (frame, file); + } + + local = CALLOC (1, sizeof (*local)); + local->file = file; + + frame->local = local; + + STACK_WIND (frame, + wb_stat_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fstat, + fd); + return 0; +} + + +int32_t +wb_truncate_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + wb_local_t *local = NULL; + + local = frame->local; + if (local->file) + fd_unref (local->file->fd); + + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + + +int32_t +wb_truncate (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + off_t offset) +{ + wb_file_t *file = NULL; + fd_t *iter_fd = NULL; + wb_local_t *local = NULL; + uint64_t tmp_file = 0; + + if (loc->inode) + { + iter_fd = fd_lookup (loc->inode, frame->root->pid); + if (iter_fd) { + if (!fd_ctx_get (iter_fd, this, &tmp_file)){ + file = (wb_file_t *)(long)tmp_file; + } else { + fd_unref (iter_fd); + } + } + + if (file) + { + wb_sync_all (frame, file); + } + } + + local = CALLOC (1, sizeof (*local)); + local->file = file; + + frame->local = local; + + STACK_WIND (frame, + wb_truncate_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->truncate, + loc, + offset); + return 0; +} + + +int32_t +wb_ftruncate (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + off_t offset) +{ + wb_file_t *file = NULL; + wb_local_t *local = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, "returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD, NULL); + return 0; + } + + file = (wb_file_t *)(long)tmp_file; + if (file) + wb_sync_all (frame, file); + + local = CALLOC (1, sizeof (*local)); + local->file = file; + + if (file) + fd_ref (file->fd); + + frame->local = local; + + STACK_WIND (frame, + wb_truncate_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->ftruncate, + fd, + offset); + return 0; +} + + +int32_t +wb_utimens_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *buf) +{ + wb_local_t *local = NULL; + + local = frame->local; + if (local->file) + fd_unref (local->file->fd); + + STACK_UNWIND (frame, op_ret, op_errno, buf); + return 0; +} + + +int32_t +wb_utimens (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + struct timespec tv[2]) +{ + wb_file_t *file = NULL; + fd_t *iter_fd = NULL; + wb_local_t *local = NULL; + uint64_t tmp_file = 0; + + if (loc->inode) { + iter_fd = fd_lookup (loc->inode, frame->root->pid); + if (iter_fd) { + if (!fd_ctx_get (iter_fd, this, &tmp_file)) { + file = (wb_file_t *)(long)tmp_file; + } else { + fd_unref (iter_fd); + } + } + + if (file) + wb_sync_all (frame, file); + } + + local = CALLOC (1, sizeof (*local)); + local->file = file; + + frame->local = local; + + STACK_WIND (frame, + wb_utimens_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->utimens, + loc, + tv); + return 0; +} + +int32_t +wb_open_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd) +{ + int32_t flags = 0; + wb_file_t *file = NULL; + wb_conf_t *conf = this->private; + + if (op_ret != -1) + { + file = wb_file_create (this, fd); + + /* If mandatory locking has been enabled on this file, + we disable caching on it */ + + if ((fd->inode->st_mode & S_ISGID) && !(fd->inode->st_mode & S_IXGRP)) + file->disabled = 1; + + /* If O_DIRECT then, we disable chaching */ + if (frame->local) + { + flags = *((int32_t *)frame->local); + if (((flags & O_DIRECT) == O_DIRECT) || + ((flags & O_RDONLY) == O_RDONLY) || + (((flags & O_SYNC) == O_SYNC) && + conf->enable_O_SYNC == _gf_true)) { + file->disabled = 1; + } + } + + LOCK_INIT (&file->lock); + } + + STACK_UNWIND (frame, op_ret, op_errno, fd); + return 0; +} + + +int32_t +wb_open (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags, + fd_t *fd) +{ + frame->local = CALLOC (1, sizeof(int32_t)); + *((int32_t *)frame->local) = flags; + + STACK_WIND (frame, + wb_open_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->open, + loc, flags, fd); + return 0; +} + + +int32_t +wb_create_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + fd_t *fd, + inode_t *inode, + struct stat *buf) +{ + wb_file_t *file = NULL; + + if (op_ret != -1) + { + file = wb_file_create (this, fd); + /* + * If mandatory locking has been enabled on this file, + * we disable caching on it + */ + if ((fd->inode->st_mode & S_ISGID) && + !(fd->inode->st_mode & S_IXGRP)) + { + file->disabled = 1; + } + + LOCK_INIT (&file->lock); + } + + STACK_UNWIND (frame, op_ret, op_errno, fd, inode, buf); + return 0; +} + + +int32_t +wb_create (call_frame_t *frame, + xlator_t *this, + loc_t *loc, + int32_t flags, + mode_t mode, + fd_t *fd) +{ + STACK_WIND (frame, + wb_create_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->create, + loc, flags, mode, fd); + return 0; +} + + +int32_t +__wb_cleanup_queue (wb_file_t *file) +{ + wb_write_request_t *request = NULL, *dummy = NULL; + int32_t bytes = 0; + + list_for_each_entry_safe (request, dummy, &file->request, list) + { + if (request->got_reply && request->write_behind) + { + bytes += iov_length (request->vector, request->count); + list_del_init (&request->list); + + FREE (request->vector); + dict_unref (request->refs); + + FREE (request); + } + } + + return bytes; +} + + +int32_t +__wb_mark_wind_all (list_head_t *list, list_head_t *winds) +{ + wb_write_request_t *request = NULL; + size_t size = 0; + + list_for_each_entry (request, list, list) + { + if (!request->stack_wound) + { + size += iov_length (request->vector, request->count); + request->stack_wound = 1; + list_add_tail (&request->winds, winds); + } + } + + return size; +} + + +size_t +__wb_get_aggregate_size (list_head_t *list) +{ + wb_write_request_t *request = NULL; + size_t size = 0; + + list_for_each_entry (request, list, list) + { + if (!request->stack_wound) + { + size += iov_length (request->vector, request->count); + } + } + + return size; +} + +uint32_t +__wb_get_incomplete_writes (list_head_t *list) +{ + wb_write_request_t *request = NULL; + uint32_t count = 0; + + list_for_each_entry (request, list, list) + { + if (request->stack_wound && !request->got_reply) + { + count++; + } + } + + return count; +} + +int32_t +__wb_mark_winds (list_head_t *list, list_head_t *winds, size_t aggregate_conf) +{ + size_t aggregate_current = 0; + uint32_t incomplete_writes = 0; + + incomplete_writes = __wb_get_incomplete_writes (list); + + aggregate_current = __wb_get_aggregate_size (list); + + if ((incomplete_writes == 0) || (aggregate_current >= aggregate_conf)) + { + __wb_mark_wind_all (list, winds); + } + + return aggregate_current; +} + + +size_t +__wb_get_window_size (list_head_t *list) +{ + wb_write_request_t *request = NULL; + size_t size = 0; + + list_for_each_entry (request, list, list) + { + if (request->write_behind && !request->got_reply) + { + size += iov_length (request->vector, request->count); + } + } + + return size; +} + + +size_t +__wb_mark_unwind_till (list_head_t *list, list_head_t *unwinds, size_t size) +{ + size_t written_behind = 0; + wb_write_request_t *request = NULL; + + list_for_each_entry (request, list, list) + { + if (written_behind <= size) + { + if (!request->write_behind) + { + wb_local_t *local = request->frame->local; + written_behind += iov_length (request->vector, request->count); + request->write_behind = 1; + list_add_tail (&local->unwind_frames, unwinds); + } + } + else + { + break; + } + } + + return written_behind; +} + + +int32_t +__wb_mark_unwinds (list_head_t *list, list_head_t *unwinds, size_t window_conf) +{ + size_t window_current = 0; + + window_current = __wb_get_window_size (list); + if (window_current <= window_conf) + { + window_current += __wb_mark_unwind_till (list, unwinds, + window_conf - window_current); + } + + return window_current; +} + + +int32_t +wb_stack_unwind (list_head_t *unwinds) +{ + struct stat buf = {0,}; + wb_local_t *local = NULL, *dummy = NULL; + + list_for_each_entry_safe (local, dummy, unwinds, unwind_frames) + { + list_del_init (&local->unwind_frames); + STACK_UNWIND (local->frame, local->op_ret, local->op_errno, &buf); + } + + return 0; +} + + +int32_t +wb_do_ops (call_frame_t *frame, wb_file_t *file, list_head_t *winds, list_head_t *unwinds) +{ + /* copy the frame before calling wb_stack_unwind, since this request containing current frame might get unwound */ + /* call_frame_t *sync_frame = copy_frame (frame); */ + + wb_stack_unwind (unwinds); + wb_sync (frame, file, winds); + + return 0; +} + + +int32_t +wb_process_queue (call_frame_t *frame, wb_file_t *file, char flush_all) +{ + list_head_t winds, unwinds; + size_t size = 0; + wb_conf_t *conf = file->this->private; + + INIT_LIST_HEAD (&winds); + INIT_LIST_HEAD (&unwinds); + + if (!file) + { + return -1; + } + + size = flush_all ? 0 : conf->aggregate_size; + LOCK (&file->lock); + { + __wb_cleanup_queue (file); + __wb_mark_winds (&file->request, &winds, size); + __wb_mark_unwinds (&file->request, &unwinds, conf->window_size); + } + UNLOCK (&file->lock); + + wb_do_ops (frame, file, &winds, &unwinds); + return 0; +} + + +wb_write_request_t * +wb_enqueue (wb_file_t *file, + call_frame_t *frame, + struct iovec *vector, + int32_t count, + off_t offset) +{ + wb_write_request_t *request = NULL; + wb_local_t *local = CALLOC (1, sizeof (*local)); + + request = CALLOC (1, sizeof (*request)); + + INIT_LIST_HEAD (&request->list); + INIT_LIST_HEAD (&request->winds); + + request->frame = frame; + request->vector = iov_dup (vector, count); + request->count = count; + request->offset = offset; + request->refs = dict_ref (frame->root->req_refs); + + frame->local = local; + local->frame = frame; + local->op_ret = iov_length (vector, count); + local->op_errno = 0; + INIT_LIST_HEAD (&local->unwind_frames); + + LOCK (&file->lock); + { + list_add_tail (&request->list, &file->request); + file->offset = offset + iov_length (vector, count); + } + UNLOCK (&file->lock); + + return request; +} + + +int32_t +wb_writev_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct stat *stbuf) +{ + STACK_UNWIND (frame, op_ret, op_errno, stbuf); + return 0; +} + + +int32_t +wb_writev (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + struct iovec *vector, + int32_t count, + off_t offset) +{ + wb_file_t *file = NULL; + char offset_expected = 1, wb_disabled = 0; + call_frame_t *process_frame = NULL; + size_t size = 0; + uint64_t tmp_file = 0; + + if (vector != NULL) + size = iov_length (vector, count); + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, "returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD, NULL); + return 0; + } + + file = (wb_file_t *)(long)tmp_file; + if (!file) { + gf_log (this->name, GF_LOG_ERROR, + "wb_file not found for fd %p", fd); + STACK_UNWIND (frame, -1, EBADFD, NULL); + return 0; + } + + LOCK (&file->lock); + { + if (file->disabled || file->disable_till) { + if (size > file->disable_till) { + file->disable_till = 0; + } else { + file->disable_till -= size; + } + wb_disabled = 1; + } + + if (file->offset != offset) + offset_expected = 0; + } + UNLOCK (&file->lock); + + if (wb_disabled) { + STACK_WIND (frame, + wb_writev_cbk, + FIRST_CHILD (frame->this), + FIRST_CHILD (frame->this)->fops->writev, + file->fd, + vector, + count, + offset); + return 0; + } + + process_frame = copy_frame (frame); + + if (!offset_expected) + wb_process_queue (process_frame, file, 1); + + wb_enqueue (file, frame, vector, count, offset); + wb_process_queue (process_frame, file, 0); + + STACK_DESTROY (process_frame->root); + + return 0; +} + + +int32_t +wb_readv_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno, + struct iovec *vector, + int32_t count, + struct stat *stbuf) +{ + wb_local_t *local = NULL; + + local = frame->local; + + STACK_UNWIND (frame, op_ret, op_errno, vector, count, stbuf); + return 0; +} + + +int32_t +wb_readv (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + size_t size, + off_t offset) +{ + wb_file_t *file = NULL; + wb_local_t *local = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, "returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD, NULL); + return 0; + } + + file = (wb_file_t *)(long)tmp_file; + if (file) + wb_sync_all (frame, file); + + local = CALLOC (1, sizeof (*local)); + local->file = file; + + frame->local = local; + + STACK_WIND (frame, + wb_readv_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->readv, + fd, size, offset); + + return 0; +} + + +int32_t +wb_ffr_bg_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + wb_local_t *local = NULL; + wb_file_t *file = NULL; + + local = frame->local; + file = local->file; + + if (file) { + fd_unref (file->fd); + } + + if (file->op_ret == -1) + { + op_ret = file->op_ret; + op_errno = file->op_errno; + + file->op_ret = 0; + } + + STACK_DESTROY (frame->root); + return 0; +} + + +int32_t +wb_ffr_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + wb_local_t *local = NULL; + wb_file_t *file = NULL; + + local = frame->local; + file = local->file; + if (file) { + /* corresponds to the fd_ref() done during wb_file_create() */ + fd_unref (file->fd); + } + + if (file->op_ret == -1) + { + op_ret = file->op_ret; + op_errno = file->op_errno; + + file->op_ret = 0; + } + + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + + +int32_t +wb_flush (call_frame_t *frame, + xlator_t *this, + fd_t *fd) +{ + wb_conf_t *conf = NULL; + wb_file_t *file = NULL; + call_frame_t *flush_frame = NULL; + wb_local_t *local = NULL; + uint64_t tmp_file = 0; + + conf = this->private; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, "returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (wb_file_t *)(long)tmp_file; + + local = CALLOC (1, sizeof (*local)); + local->file = file; + if (file) + fd_ref (file->fd); + + if (&file->request != file->request.next) { + gf_log (this->name, GF_LOG_DEBUG, + "request queue is not empty, it has to be synced"); + } + + if (conf->flush_behind && + (!file->disabled) && (file->disable_till == 0)) { + flush_frame = copy_frame (frame); + STACK_UNWIND (frame, file->op_ret, + file->op_errno); // liar! liar! :O + + flush_frame->local = local; + wb_sync_all (flush_frame, file); + + STACK_WIND (flush_frame, + wb_ffr_bg_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->flush, + fd); + } else { + wb_sync_all (frame, file); + + frame->local = local; + STACK_WIND (frame, + wb_ffr_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->flush, + fd); + } + + return 0; +} + + +int32_t +wb_fsync_cbk (call_frame_t *frame, + void *cookie, + xlator_t *this, + int32_t op_ret, + int32_t op_errno) +{ + wb_local_t *local = NULL; + wb_file_t *file = NULL; + + local = frame->local; + file = local->file; + + if (file->op_ret == -1) + { + op_ret = file->op_ret; + op_errno = file->op_errno; + + file->op_ret = 0; + } + + STACK_UNWIND (frame, op_ret, op_errno); + return 0; +} + +int32_t +wb_fsync (call_frame_t *frame, + xlator_t *this, + fd_t *fd, + int32_t datasync) +{ + wb_file_t *file = NULL; + wb_local_t *local = NULL; + uint64_t tmp_file = 0; + + if (fd_ctx_get (fd, this, &tmp_file)) { + gf_log (this->name, GF_LOG_ERROR, "returning EBADFD"); + STACK_UNWIND (frame, -1, EBADFD); + return 0; + } + + file = (wb_file_t *)(long)tmp_file; + if (file) + wb_sync_all (frame, file); + + local = CALLOC (1, sizeof (*local)); + local->file = file; + + frame->local = local; + + STACK_WIND (frame, + wb_fsync_cbk, + FIRST_CHILD(this), + FIRST_CHILD(this)->fops->fsync, + fd, datasync); + return 0; +} + + +int32_t +wb_release (xlator_t *this, + fd_t *fd) +{ + uint64_t file = 0; + + fd_ctx_get (fd, this, &file); + wb_file_destroy ((wb_file_t *)(long)file); + + return 0; +} + + +int32_t +init (xlator_t *this) +{ + dict_t *options = NULL; + wb_conf_t *conf = NULL; + char *aggregate_size_string = NULL; + char *window_size_string = NULL; + char *flush_behind_string = NULL; + char *disable_till_string = NULL; + char *enable_O_SYNC_string = NULL; + int32_t ret = -1; + + if ((this->children == NULL) + || this->children->next) { + gf_log (this->name, GF_LOG_ERROR, + "FATAL: write-behind (%s) not configured with exactly one child", + this->name); + return -1; + } + + if (this->parents == NULL) { + gf_log (this->name, GF_LOG_WARNING, + "dangling volume. check volfile"); + } + + options = this->options; + + conf = CALLOC (1, sizeof (*conf)); + + conf->enable_O_SYNC = _gf_false; + ret = dict_get_str (options, "enable-O_SYNC", + &enable_O_SYNC_string); + if (ret == 0) { + ret = gf_string2boolean (enable_O_SYNC_string, + &conf->enable_O_SYNC); + if (ret == -1) { + gf_log (this->name, GF_LOG_ERROR, + "'enable-O_SYNC' takes only boolean arguments"); + return -1; + } + } + + /* configure 'options aggregate-size <size>' */ + conf->aggregate_size = 0; + ret = dict_get_str (options, "block-size", + &aggregate_size_string); + if (ret == 0) { + ret = gf_string2bytesize (aggregate_size_string, + &conf->aggregate_size); + if (ret != 0) { + gf_log (this->name, GF_LOG_ERROR, + "invalid number format \"%s\" of \"option aggregate-size\"", + aggregate_size_string); + return -1; + } + } + + gf_log (this->name, GF_LOG_DEBUG, + "using aggregate-size = %"PRIu64"", + conf->aggregate_size); + + conf->disable_till = 1; + ret = dict_get_str (options, "disable-for-first-nbytes", + &disable_till_string); + if (ret == 0) { + ret = gf_string2bytesize (disable_till_string, + &conf->disable_till); + if (ret != 0) { + gf_log (this->name, GF_LOG_ERROR, + "invalid number format \"%s\" of \"option disable-for-first-nbytes\"", + disable_till_string); + return -1; + } + } + + gf_log (this->name, GF_LOG_DEBUG, + "disabling write-behind for first %"PRIu64" bytes", + conf->disable_till); + + /* configure 'option window-size <size>' */ + conf->window_size = 0; + ret = dict_get_str (options, "cache-size", + &window_size_string); + if (ret == 0) { + ret = gf_string2bytesize (window_size_string, + &conf->window_size); + if (ret != 0) { + gf_log (this->name, GF_LOG_ERROR, + "invalid number format \"%s\" of \"option window-size\"", + window_size_string); + FREE (conf); + return -1; + } + } + + if (!conf->window_size && conf->aggregate_size) { + gf_log (this->name, GF_LOG_WARNING, + "setting window-size to be equal to aggregate-size(%"PRIu64")", + conf->aggregate_size); + conf->window_size = conf->aggregate_size; + } + + if (conf->window_size < conf->aggregate_size) { + gf_log (this->name, GF_LOG_ERROR, + "aggregate-size(%"PRIu64") cannot be more than window-size" + "(%"PRIu64")", conf->window_size, conf->aggregate_size); + FREE (conf); + return -1; + } + + /* configure 'option flush-behind <on/off>' */ + conf->flush_behind = 0; + ret = dict_get_str (options, "flush-behind", + &flush_behind_string); + if (ret == 0) { + ret = gf_string2boolean (flush_behind_string, + &conf->flush_behind); + if (ret == -1) { + gf_log (this->name, GF_LOG_ERROR, + "'flush-behind' takes only boolean arguments"); + return -1; + } + + if (conf->flush_behind) { + gf_log (this->name, GF_LOG_DEBUG, + "enabling flush-behind"); + } + } + this->private = conf; + return 0; +} + + +void +fini (xlator_t *this) +{ + wb_conf_t *conf = this->private; + + FREE (conf); + return; +} + + +struct xlator_fops fops = { + .writev = wb_writev, + .open = wb_open, + .create = wb_create, + .readv = wb_readv, + .flush = wb_flush, + .fsync = wb_fsync, + .stat = wb_stat, + .fstat = wb_fstat, + .truncate = wb_truncate, + .ftruncate = wb_ftruncate, + .utimens = wb_utimens, +}; + +struct xlator_mops mops = { +}; + +struct xlator_cbks cbks = { + .release = wb_release +}; + +struct volume_options options[] = { + { .key = {"flush-behind"}, + .type = GF_OPTION_TYPE_BOOL + }, + { .key = {"block-size", "aggregate-size"}, + .type = GF_OPTION_TYPE_SIZET, + .min = 128 * GF_UNIT_KB, + .max = 4 * GF_UNIT_MB + }, + { .key = {"cache-size", "window-size"}, + .type = GF_OPTION_TYPE_SIZET, + .min = 512 * GF_UNIT_KB, + .max = 1 * GF_UNIT_GB + }, + { .key = {"disable-for-first-nbytes"}, + .type = GF_OPTION_TYPE_SIZET, + .min = 1, + .max = 1 * GF_UNIT_MB, + }, + { .key = {"enable-O_SYNC"}, + .type = GF_OPTION_TYPE_BOOL, + }, + { .key = {NULL} }, +}; 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