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ocfs2: Provide convenience function for ino lookup

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A couple paths which needed to just match a parent dir + name pair to an
inode number were a bit messy because they had to deal with
ocfs2_find_files_on_disk() which returns a larger number of values. Provide
a convenience function, ocfs2_lookup_ino_from_name() which internalizes all
the extra accounting.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Reviewed-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Mark Fasheh 2007-09-11 15:22:06 -07:00
parent 0bfbbf62a8
commit be94d11704
5 changed files with 25 additions and 21 deletions
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17
fs/ocfs2/dir.c
View file

@ -628,6 +628,23 @@ int ocfs2_find_files_on_disk(const char *name,
return status;
}
/*
* Convenience function for callers which just want the block number
* mapped to a name and don't require the full dirent info, etc.
*/
int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
int namelen, u64 *blkno)
{
int ret;
struct buffer_head *bh = NULL;
struct ocfs2_dir_entry *dirent = NULL;
ret = ocfs2_find_files_on_disk(name, namelen, blkno, dir, &bh, &dirent);
brelse(bh);
return ret;
}
/* Check for a name within a directory.
*
* Return 0 if the name does not exist

2
fs/ocfs2/dir.h
View file

@ -61,6 +61,8 @@ int ocfs2_find_files_on_disk(const char *name,
struct inode *inode,
struct buffer_head **dirent_bh,
struct ocfs2_dir_entry **dirent);
int ocfs2_lookup_ino_from_name(struct inode *dir, const char *name,
int namelen, u64 *blkno);
int ocfs2_readdir(struct file *filp, void *dirent, filldir_t filldir);
int ocfs2_dir_foreach(struct inode *inode, loff_t *f_pos, void *priv,
filldir_t filldir);

8
fs/ocfs2/export.c
View file

@ -88,8 +88,6 @@ static struct dentry *ocfs2_get_parent(struct dentry *child)
struct dentry *parent;
struct inode *inode;
struct inode *dir = child->d_inode;
struct buffer_head *dirent_bh = NULL;
struct ocfs2_dir_entry *dirent;
mlog_entry("(0x%p, '%.*s')\n", child,
child->d_name.len, child->d_name.name);
@ -105,8 +103,7 @@ static struct dentry *ocfs2_get_parent(struct dentry *child)
goto bail;
}
status = ocfs2_find_files_on_disk("..", 2, &blkno, dir, &dirent_bh,
&dirent);
status = ocfs2_lookup_ino_from_name(dir, "..", 2, &blkno);
if (status < 0) {
parent = ERR_PTR(-ENOENT);
goto bail_unlock;
@ -131,9 +128,6 @@ static struct dentry *ocfs2_get_parent(struct dentry *child)
bail_unlock:
ocfs2_meta_unlock(dir, 0);
if (dirent_bh)
brelse(dirent_bh);
bail:
mlog_exit_ptr(parent);

9
fs/ocfs2/namei.c
View file

@ -101,10 +101,8 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
{
int status;
u64 blkno;
struct buffer_head *dirent_bh = NULL;
struct inode *inode = NULL;
struct dentry *ret;
struct ocfs2_dir_entry *dirent;
struct ocfs2_inode_info *oi;
mlog_entry("(0x%p, 0x%p, '%.*s')\n", dir, dentry,
@ -126,9 +124,8 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
goto bail;
}
status = ocfs2_find_files_on_disk(dentry->d_name.name,
dentry->d_name.len, &blkno,
dir, &dirent_bh, &dirent);
status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
dentry->d_name.len, &blkno);
if (status < 0)
goto bail_add;
@ -183,8 +180,6 @@ static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
ocfs2_meta_unlock(dir, 0);
bail:
if (dirent_bh)
brelse(dirent_bh);
mlog_exit_ptr(ret);

10
fs/ocfs2/sysfile.c
View file

@ -100,17 +100,14 @@ static struct inode * _ocfs2_get_system_file_inode(struct ocfs2_super *osb,
char namebuf[40];
struct inode *inode = NULL;
u64 blkno;
struct buffer_head *dirent_bh = NULL;
struct ocfs2_dir_entry *de = NULL;
int status = 0;
ocfs2_sprintf_system_inode_name(namebuf,
sizeof(namebuf),
type, slot);
status = ocfs2_find_files_on_disk(namebuf, strlen(namebuf),
&blkno, osb->sys_root_inode,
&dirent_bh, &de);
status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, namebuf,
strlen(namebuf), &blkno);
if (status < 0) {
goto bail;
}
@ -122,8 +119,7 @@ static struct inode * _ocfs2_get_system_file_inode(struct ocfs2_super *osb,
goto bail;
}
bail:
if (dirent_bh)
brelse(dirent_bh);
return inode;
}