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ocfs2: split out ocfs2_prepare_orphan_dir() into locking and prep functions 

We do this because ocfs2_create_inode_in_orphan() wants to order locking of
the orphan dir with respect to locking of the inode allocator *before*
making any changes to the directory.

Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Mark Fasheh 2010-08-13 15:15:18 -07:00 committed by Tao Ma
parent e49e27674d
commit dd43bcde23
1 changed files with 93 additions and 37 deletions
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130
fs/ocfs2/namei.c
View File

@ -1871,61 +1871,117 @@ bail:
return status;
}
static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
struct inode **ret_orphan_dir,
struct buffer_head **ret_orphan_dir_bh)
{
struct inode *orphan_dir_inode;
struct buffer_head *orphan_dir_bh = NULL;
int ret = 0;
orphan_dir_inode = ocfs2_get_system_file_inode(osb,
ORPHAN_DIR_SYSTEM_INODE,
osb->slot_num);
if (!orphan_dir_inode) {
ret = -ENOENT;
mlog_errno(ret);
return ret;
}
mutex_lock(&orphan_dir_inode->i_mutex);
ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
if (ret < 0) {
mutex_unlock(&orphan_dir_inode->i_mutex);
iput(orphan_dir_inode);
mlog_errno(ret);
return ret;
}
*ret_orphan_dir = orphan_dir_inode;
*ret_orphan_dir_bh = orphan_dir_bh;
return 0;
}
static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
struct buffer_head *orphan_dir_bh,
u64 blkno,
char *name,
struct ocfs2_dir_lookup_result *lookup)
{
int ret;
struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
ret = ocfs2_blkno_stringify(blkno, name);
if (ret < 0) {
mlog_errno(ret);
return ret;
}
ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
orphan_dir_bh, name,
OCFS2_ORPHAN_NAMELEN, lookup);
if (ret < 0) {
mlog_errno(ret);
return ret;
}
return 0;
}
/**
* ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
* insertion of an orphan.
* @osb: ocfs2 file system
* @ret_orphan_dir: Orphan dir inode - returned locked!
* @blkno: Actual block number of the inode to be inserted into orphan dir.
* @lookup: dir lookup result, to be passed back into functions like
* ocfs2_orphan_add
*
* Returns zero on success and the ret_orphan_dir, name and lookup
* fields will be populated.
*
* Returns non-zero on failure.
*/
static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
struct inode **ret_orphan_dir,
u64 blkno,
char *name,
struct ocfs2_dir_lookup_result *lookup)
{
struct inode *orphan_dir_inode;
struct inode *orphan_dir_inode = NULL;
struct buffer_head *orphan_dir_bh = NULL;
int status = 0;
int ret = 0;
status = ocfs2_blkno_stringify(blkno, name);
if (status < 0) {
mlog_errno(status);
return status;
ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
&orphan_dir_bh);
if (ret < 0) {
mlog_errno(ret);
return ret;
}
orphan_dir_inode = ocfs2_get_system_file_inode(osb,
ORPHAN_DIR_SYSTEM_INODE,
osb->slot_num);
if (!orphan_dir_inode) {
status = -ENOENT;
mlog_errno(status);
return status;
}
mutex_lock(&orphan_dir_inode->i_mutex);
status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
if (status < 0) {
mlog_errno(status);
goto leave;
}
status = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
orphan_dir_bh, name,
OCFS2_ORPHAN_NAMELEN, lookup);
if (status < 0) {
ocfs2_inode_unlock(orphan_dir_inode, 1);
mlog_errno(status);
goto leave;
ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
blkno, name, lookup);
if (ret < 0) {
mlog_errno(ret);
goto out;
}
*ret_orphan_dir = orphan_dir_inode;
leave:
if (status) {
out:
brelse(orphan_dir_bh);
if (ret) {
ocfs2_inode_unlock(orphan_dir_inode, 1);
mutex_unlock(&orphan_dir_inode->i_mutex);
iput(orphan_dir_inode);
}
brelse(orphan_dir_bh);
mlog_exit(status);
return status;
mlog_exit(ret);
return ret;
}
static int ocfs2_orphan_add(struct ocfs2_super *osb,