diff options
Diffstat (limited to 'xlators/performance/io-cache')
| -rw-r--r-- | xlators/performance/io-cache/Makefile.am | 3 | ||||
| -rw-r--r-- | xlators/performance/io-cache/src/Makefile.am | 14 | ||||
| -rw-r--r-- | xlators/performance/io-cache/src/io-cache.c | 1478 | ||||
| -rw-r--r-- | xlators/performance/io-cache/src/io-cache.h | 330 | ||||
| -rw-r--r-- | xlators/performance/io-cache/src/ioc-inode.c | 201 | ||||
| -rw-r--r-- | xlators/performance/io-cache/src/page.c | 778 |
6 files changed, 2804 insertions, 0 deletions
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; +} |