rewriting stat-prefetch translator
- stat-prefetch aims to optimize operations like 'ls -l' where a readdir is immediately followed by stat calls on each of the directory entry read. More details on design can be found in doc/stat-prefetch-design.txt Signed-off-by: Anand V. Avati <avati@dev.gluster.com> BUG: 221 (stat prefetch implementation) URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=221
This commit is contained in:
Raghavendra G
Anand V. Avati
parent
314eb5fecf
commit
bcd092a21f
@ -67,6 +67,8 @@ AC_CONFIG_FILES([Makefile
|
||||
xlators/performance/symlink-cache/src/Makefile
|
||||
xlators/performance/quick-read/Makefile
|
||||
xlators/performance/quick-read/src/Makefile
|
||||
xlators/performance/stat-prefetch/Makefile
|
||||
xlators/performance/stat-prefetch/src/Makefile
|
||||
xlators/debug/Makefile
|
||||
xlators/debug/trace/Makefile
|
||||
xlators/debug/trace/src/Makefile
|
||||
|
||||
128
doc/stat-prefetch-design.txt
Normal file
128
doc/stat-prefetch-design.txt
Normal file
@ -0,0 +1,128 @@
|
||||
what is stat-prefetch?
|
||||
======================
|
||||
It is a translator which caches the dentries read in readdir. This dentry
|
||||
list is stored in the context of fd. Later when lookup happens on
|
||||
[parent-inode, basename (path)] combination, this list is searched for the
|
||||
basename. The dentry thus searched is used to fill up the stat corresponding
|
||||
to path being looked upon, thereby short-cutting lookup calls. This cache is
|
||||
preserved till closedir is called on the fd. The purpose of this translator
|
||||
is to optimize operations like 'ls -l', where a readdir is followed by
|
||||
lookup (stat) calls on each directory entry.
|
||||
|
||||
1. stat-prefetch harnesses the efficiency of short lookup calls
|
||||
(saves network roundtrip time for lookup calls from being accounted to
|
||||
the stat call).
|
||||
2. To maintain the correctness, it does lookup-behind - lookup is winded to
|
||||
underlying translators after it is unwound to upper translators.
|
||||
A lookup-behind is necessary as inode gets populated in server inode table
|
||||
only in lookup-cbk. Also various translators store their contexts in inode
|
||||
contexts during lookup calls.
|
||||
|
||||
fops to be implemented:
|
||||
======================
|
||||
* lookup
|
||||
Check the dentry cache stored in context of fds opened by the same process
|
||||
on parent inode for basename. If found unwind with cached stat, else wind
|
||||
the lookup call to underlying translators. We also store the stat path in
|
||||
context of inode if the path being looked upon happens to be directory.
|
||||
This stat will be used to fill postparent stat when lookup happens on any of
|
||||
the directory contents.
|
||||
|
||||
* readdir
|
||||
Cache the direntries returned in readdir_cbk in the context of fd. If the
|
||||
readdir is happening on non-expected offsets (means a seekdir/rewinddir
|
||||
has happened), cache has to be flushed.
|
||||
|
||||
* chmod/fchmod
|
||||
Delete the entry corresponding to basename from cache stored in context of
|
||||
fds opened on parent inode, since these calls change st_mode and ctime of
|
||||
stat.
|
||||
|
||||
* chown/fchown
|
||||
Delete the entry corresponding to basename from cache stored in context of
|
||||
fds opened on parent inode, since these calls change st_uid/st_gid and
|
||||
st_ctime of stat.
|
||||
|
||||
* truncate/ftruncate
|
||||
Delete the entry corresponding to basename from cache stored in context of
|
||||
fds opened on parent inode, since these calls change st_size/st_mtime of stat.
|
||||
|
||||
* utimens
|
||||
Delete the entry corresponding to basename from cache stored in context of
|
||||
fds opened on parent inode, since this call changes st_atime/st_mtime of stat.
|
||||
|
||||
* readlink
|
||||
Delete the entry corresponding to basename from cache stored in context of fds
|
||||
opened on parent inode, since this call changes st_atime of stat.
|
||||
|
||||
* unlink
|
||||
1. Delete the entry corresponding to basename from cache stored in context of
|
||||
fds opened on parent directory containing file being unlinked.
|
||||
2. Delete the entry corresponding to basename of parent directory from cache
|
||||
of its parent directory.
|
||||
|
||||
* rmdir
|
||||
1. Delete the entry corresponding to basename from cache stored in context of
|
||||
fds opened on parent inode.
|
||||
2. Remove the entire cache from all fds opened on inode corresponding to
|
||||
directory being removed.
|
||||
|
||||
* readv
|
||||
Delete the entry corresponding to basename from cache stored in context of fds
|
||||
opened on parent inode, since readv changes st_atime of file.
|
||||
|
||||
* writev
|
||||
Delete the entry corresponding to basename from cache stored in context of fds
|
||||
opened on parent inode, since writev can possibly change st_size and definitely
|
||||
changes st_mtime of file.
|
||||
|
||||
* fsync
|
||||
There is a confusion here as to whether fsync updates mtime/ctimes. Disk based
|
||||
filesystems (atleast ext2) just writes the times stored in inode to disk
|
||||
during fsync and not the time at which fsync is being done. But in glusterfs,
|
||||
a translator like write-behind actually sends writes during fsync which will
|
||||
change mtime/ctime. Hence stat-prefetch implements fsync to delete the entry
|
||||
corresponding to basename from cache stored in context of fds opened on parent
|
||||
inode.
|
||||
|
||||
* rename
|
||||
1. remove entry corresponding to oldname from cache stored in fd contexts of
|
||||
old parent directory.
|
||||
2. remove entry corresponding to new parent directory from cache stored in
|
||||
fd contexts of its parent directory.
|
||||
|
||||
* create/mknod/mkdir/symlink/link
|
||||
Delete entry corresponding to basename of directory in which these operations
|
||||
are happening, from cache stored in context of fds of parent directory. Note
|
||||
that the parent directory containing the cahce is of the directory in which
|
||||
these operations are happening.
|
||||
|
||||
* setxattr/removexattr
|
||||
Delete the entry corresponding to basename from cache stored in context of fds
|
||||
opened on parent inode, since setxattr changes st_ctime of file.
|
||||
|
||||
* setdents/getdents/checksum/xattrop/fxattrop
|
||||
These calls modify various times of stat structure, hence appropriate entries
|
||||
have to be removed from the cache. I am leaving these calls unimplemented in
|
||||
stat-prefetch for timebeing. Once we have a working translator, these five fops
|
||||
will be implemented.
|
||||
|
||||
callbacks to be implemented:
|
||||
=======================
|
||||
* releasedir
|
||||
Flush the stat-prefetch cache.
|
||||
|
||||
* forget
|
||||
Free the stat if the inode corresponds to a directory.
|
||||
|
||||
limitations:
|
||||
============
|
||||
* since a readdir does not return extended attributes of file, if need_xattr is
|
||||
set, short-cutting of lookup does not happen and lookup is passed to
|
||||
underlying translators.
|
||||
|
||||
* posix_readdir does not check whether the dentries are spanning across multiple
|
||||
mount points. Hence it is not transforming inode numbers in stat buffers if
|
||||
posix is configured to allow export directory spanning on multiple mountpoints.
|
||||
This is a bug which needs to be fixed. posix_readdir should treat dentries the
|
||||
same way as if lookup is happening on dentries.
|
||||
@ -1,3 +1,3 @@
|
||||
SUBDIRS = write-behind read-ahead io-threads io-cache symlink-cache quick-read
|
||||
SUBDIRS = write-behind read-ahead io-threads io-cache symlink-cache quick-read stat-prefetch
|
||||
|
||||
CLEANFILES =
|
||||
|
||||
@ -1,11 +1,14 @@
|
||||
xlator_PROGRAMS = stat-prefetch.so
|
||||
xlator_LTLIBRARIES = stat-prefetch.la
|
||||
xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/performance
|
||||
|
||||
stat_prefetch_so_SOURCES = stat-prefetch.c
|
||||
stat_prefetch_la_LDFLAGS = -module -avoidversion
|
||||
stat_prefetch_la_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
|
||||
stat_prefetch_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 =
|
||||
|
||||
|
||||
@ -1,508 +1,53 @@
|
||||
/*
|
||||
Copyright (c) 2006-2009 Z RESEARCH, Inc. <http://www.zresearch.com>
|
||||
This file is part of GlusterFS.
|
||||
Copyright (c) 2009-2010 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 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.
|
||||
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/>.
|
||||
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)
|
||||
init (xlator_t *this)
|
||||
{
|
||||
char *path = frame->local;
|
||||
pid_t pid = frame->root->pid;
|
||||
frame->local = NULL;
|
||||
int32_t ret = -1;
|
||||
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);
|
||||
goto out;
|
||||
}
|
||||
|
||||
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;
|
||||
ret = 0;
|
||||
out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
void
|
||||
fini (struct xlator *this)
|
||||
fini (xlator_t *this)
|
||||
{
|
||||
return;
|
||||
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 = {
|
||||
};
|
||||
|
||||
struct xlator_cbks cbks = {
|
||||
};
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
/*
|
||||
Copyright (c) 2006-2009 Z RESEARCH, Inc. <http://www.zresearch.com>
|
||||
Copyright (c) 2009-2010 Z RESEARCH, Inc. <http://www.zresearch.com>
|
||||
This file is part of GlusterFS.
|
||||
|
||||
GlusterFS is free software; you can redistribute it and/or modify
|
||||
@ -17,16 +17,16 @@
|
||||
<http://www.gnu.org/licenses/>.
|
||||
*/
|
||||
|
||||
#ifndef _STAT_PREFETCH_H_
|
||||
#define _STAT_PREFETCH_H_
|
||||
#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 "glusterfs.h"
|
||||
#include "dict.h"
|
||||
#include "xlator.h"
|
||||
|
||||
#endif /* _STAT_PREFETCH_H_ */
|
||||
#endif /* #ifndef _STAT_PREFETCH_H */
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user