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authorshishir gowda <sgowda@redhat.com>2012-08-07 12:55:31 +0530
committerAnand Avati <avati@redhat.com>2012-08-13 23:24:04 -0700
commite404e9b81f18c0a36a5c67ebf041ac0a00ca2eb1 (patch)
treed0d1abbbfcd100814487cb1692487a6c98989c45 /xlators/storage/posix/src
parentcdf6ad3695b0842acc3d4aadc5ebb474f07e8913 (diff)
cluster/dht: Optimize readdirp calls in DHT
Bring in option which is supported by posix xlator to filter out directory's entries from being returned. DHT would now request non-first subvols to filter out directory entries. dht xlator-option readdir-optimize will enable this optimization Change-Id: I35224bc81c9657f54f952efac02790276c35ded5 BUG: 838199 Signed-off-by: shishir gowda <sgowda@redhat.com> Reviewed-on: http://review.gluster.com/3772 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'xlators/storage/posix/src')
-rw-r--r--xlators/storage/posix/src/posix.c34
1 files changed, 32 insertions, 2 deletions
diff --git a/xlators/storage/posix/src/posix.c b/xlators/storage/posix/src/posix.c
index e2f1bbd5f97..6d0f8caa339 100644
--- a/xlators/storage/posix/src/posix.c
+++ b/xlators/storage/posix/src/posix.c
@@ -3547,7 +3547,7 @@ posix_fentrylk (call_frame_t *frame, xlator_t *this,
int
posix_fill_readdir (fd_t *fd, DIR *dir, off_t off, size_t size,
- gf_dirent_t *entries)
+ gf_dirent_t *entries, xlator_t *this, int32_t skip_dirs)
{
off_t in_case = -1;
size_t filled = 0;
@@ -3557,6 +3557,18 @@ posix_fill_readdir (fd_t *fd, DIR *dir, off_t off, size_t size,
int32_t this_size = -1;
gf_dirent_t *this_entry = NULL;
uuid_t rootgfid = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
+ struct stat stbuf = {0,};
+ char *hpath = NULL;
+ int len = 0;
+ int ret = 0;
+
+ if (skip_dirs) {
+ len = posix_handle_path (this, fd->inode->gfid, NULL, NULL, 0);
+ hpath = alloca (len + 256); /* NAME_MAX */
+ posix_handle_path (this, fd->inode->gfid, NULL, hpath, len);
+ len = strlen (hpath);
+ hpath[len] = '/';
+ }
if (!off) {
rewinddir (dir);
@@ -3607,6 +3619,17 @@ posix_fill_readdir (fd_t *fd, DIR *dir, off_t off, size_t size,
continue;
}
+ if (skip_dirs) {
+ if (DT_ISDIR (entry->d_type)) {
+ continue;
+ } else if (hpath) {
+ strcpy (&hpath[len+1],entry->d_name);
+ ret = lstat (hpath, &stbuf);
+ if (!ret && S_ISDIR (stbuf.st_mode))
+ continue;
+ }
+ }
+
this_size = max (sizeof (gf_dirent_t),
sizeof (gfs3_dirplist))
+ strlen (entry->d_name) + 1;
@@ -3728,6 +3751,7 @@ posix_do_readdir (call_frame_t *frame, xlator_t *this,
int32_t op_ret = -1;
int32_t op_errno = 0;
gf_dirent_t entries;
+ int32_t skip_dirs = 0;
VALIDATE_OR_GOTO (frame, out);
@@ -3753,7 +3777,13 @@ posix_do_readdir (call_frame_t *frame, xlator_t *this,
goto out;
}
- count = posix_fill_readdir (fd, dir, off, size, &entries);
+ /* When READDIR_FILTER option is set to on, we can filter out
+ * directory's entry from the entry->list.
+ */
+ ret = dict_get_int32 (dict, GF_READDIR_SKIP_DIRS, &skip_dirs);
+
+ count = posix_fill_readdir (fd, dir, off, size, &entries, this,
+ skip_dirs);
/* pick ENOENT to indicate EOF */
op_errno = errno;