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authorJeff Mahoney <jeffm@suse.com>2009-03-30 14:02:40 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-30 12:16:38 -0700
commita41f1a4715f26f7bc4d047d0bc7710145c8e69c7 (patch)
tree8b5d94368e774ec490619593300e8b3f4b7c5cb1 /fs/reiserfs/dir.c
parent0ab2621ebd9a28bf7a524ecd50d492a10579dfcc (diff)
downloadlinux-a41f1a4715f26f7bc4d047d0bc7710145c8e69c7.tar.bz2
reiserfs: use generic readdir for operations across all xattrs
The current reiserfs xattr implementation open codes reiserfs_readdir and frees the path before calling the filldir function. Typically, the filldir function is something that modifies the file system, such as a chown or an inode deletion that also require reading of an inode associated with each direntry. Since the file system is modified, the path retained becomes invalid for the next run. In addition, it runs backwards in attempt to minimize activity. This is clearly suboptimal from a code cleanliness perspective as well as performance-wise. This patch implements a generic reiserfs_for_each_xattr that uses the generic readdir and a specific filldir routine that simply populates an array of dentries and then performs a specific operation on them. When all files have been operated on, it then calls the operation on the directory itself. The result is a noticable code reduction and better performance. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/reiserfs/dir.c')
-rw-r--r--fs/reiserfs/dir.c28
1 files changed, 15 insertions, 13 deletions
diff --git a/fs/reiserfs/dir.c b/fs/reiserfs/dir.c
index e6b03d2020c1..67a80d7e59e2 100644
--- a/fs/reiserfs/dir.c
+++ b/fs/reiserfs/dir.c
@@ -41,10 +41,10 @@ static int reiserfs_dir_fsync(struct file *filp, struct dentry *dentry,
#define store_ih(where,what) copy_item_head (where, what)
-//
-static int reiserfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+int reiserfs_readdir_dentry(struct dentry *dentry, void *dirent,
+ filldir_t filldir, loff_t *pos)
{
- struct inode *inode = filp->f_path.dentry->d_inode;
+ struct inode *inode = dentry->d_inode;
struct cpu_key pos_key; /* key of current position in the directory (key of directory entry) */
INITIALIZE_PATH(path_to_entry);
struct buffer_head *bh;
@@ -64,13 +64,9 @@ static int reiserfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
/* form key for search the next directory entry using f_pos field of
file structure */
- make_cpu_key(&pos_key, inode,
- (filp->f_pos) ? (filp->f_pos) : DOT_OFFSET, TYPE_DIRENTRY,
- 3);
+ make_cpu_key(&pos_key, inode, *pos ?: DOT_OFFSET, TYPE_DIRENTRY, 3);
next_pos = cpu_key_k_offset(&pos_key);
- /* reiserfs_warning (inode->i_sb, "reiserfs_readdir 1: f_pos = %Ld", filp->f_pos); */
-
path_to_entry.reada = PATH_READA;
while (1) {
research:
@@ -144,7 +140,7 @@ static int reiserfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
/* Ignore the .reiserfs_priv entry */
if (reiserfs_xattrs(inode->i_sb) &&
!old_format_only(inode->i_sb) &&
- filp->f_path.dentry == inode->i_sb->s_root &&
+ dentry == inode->i_sb->s_root &&
REISERFS_SB(inode->i_sb)->priv_root &&
REISERFS_SB(inode->i_sb)->priv_root->d_inode
&& deh_objectid(deh) ==
@@ -156,7 +152,7 @@ static int reiserfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
}
d_off = deh_offset(deh);
- filp->f_pos = d_off;
+ *pos = d_off;
d_ino = deh_objectid(deh);
if (d_reclen <= 32) {
local_buf = small_buf;
@@ -223,15 +219,21 @@ static int reiserfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
} /* while */
- end:
- filp->f_pos = next_pos;
+end:
+ *pos = next_pos;
pathrelse(&path_to_entry);
reiserfs_check_path(&path_to_entry);
- out:
+out:
reiserfs_write_unlock(inode->i_sb);
return ret;
}
+static int reiserfs_readdir(struct file *file, void *dirent, filldir_t filldir)
+{
+ struct dentry *dentry = file->f_path.dentry;
+ return reiserfs_readdir_dentry(dentry, dirent, filldir, &file->f_pos);
+}
+
/* compose directory item containing "." and ".." entries (entries are
not aligned to 4 byte boundary) */
/* the last four params are LE */