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-rw-r--r--xlators/performance/read-ahead/src/read-ahead.c890
1 files changed, 890 insertions, 0 deletions
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 000000000..0060e00fd
--- /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} },
+};