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Diffstat (limited to 'fs/ocfs2/namei.c')
-rw-r--r--fs/ocfs2/namei.c43
1 files changed, 35 insertions, 8 deletions
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index b931e04e3388..914c121ec890 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -94,6 +94,14 @@ static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
struct inode *inode,
const char *symname);
+static int ocfs2_double_lock(struct ocfs2_super *osb,
+ struct buffer_head **bh1,
+ struct inode *inode1,
+ struct buffer_head **bh2,
+ struct inode *inode2,
+ int rename);
+
+static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
/* An orphan dir name is an 8 byte value, printed as a hex string */
#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
@@ -678,8 +686,10 @@ static int ocfs2_link(struct dentry *old_dentry,
{
handle_t *handle;
struct inode *inode = old_dentry->d_inode;
+ struct inode *old_dir = old_dentry->d_parent->d_inode;
int err;
struct buffer_head *fe_bh = NULL;
+ struct buffer_head *old_dir_bh = NULL;
struct buffer_head *parent_fe_bh = NULL;
struct ocfs2_dinode *fe = NULL;
struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
@@ -696,19 +706,33 @@ static int ocfs2_link(struct dentry *old_dentry,
dquot_initialize(dir);
- err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
+ err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
+ &parent_fe_bh, dir, 0);
if (err < 0) {
if (err != -ENOENT)
mlog_errno(err);
return err;
}
+ /* make sure both dirs have bhs
+ * get an extra ref on old_dir_bh if old==new */
+ if (!parent_fe_bh) {
+ if (old_dir_bh) {
+ parent_fe_bh = old_dir_bh;
+ get_bh(parent_fe_bh);
+ } else {
+ mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
+ err = -EIO;
+ goto out;
+ }
+ }
+
if (!dir->i_nlink) {
err = -ENOENT;
goto out;
}
- err = ocfs2_lookup_ino_from_name(dir, old_dentry->d_name.name,
+ err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
old_dentry->d_name.len, &old_de_ino);
if (err) {
err = -ENOENT;
@@ -801,10 +825,11 @@ out_unlock_inode:
ocfs2_inode_unlock(inode, 1);
out:
- ocfs2_inode_unlock(dir, 1);
+ ocfs2_double_unlock(old_dir, dir);
brelse(fe_bh);
brelse(parent_fe_bh);
+ brelse(old_dir_bh);
ocfs2_free_dir_lookup_result(&lookup);
@@ -1072,14 +1097,15 @@ static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
}
/*
- * The only place this should be used is rename!
+ * The only place this should be used is rename and link!
* if they have the same id, then the 1st one is the only one locked.
*/
static int ocfs2_double_lock(struct ocfs2_super *osb,
struct buffer_head **bh1,
struct inode *inode1,
struct buffer_head **bh2,
- struct inode *inode2)
+ struct inode *inode2,
+ int rename)
{
int status;
int inode1_is_ancestor, inode2_is_ancestor;
@@ -1127,7 +1153,7 @@ static int ocfs2_double_lock(struct ocfs2_super *osb,
}
/* lock id2 */
status = ocfs2_inode_lock_nested(inode2, bh2, 1,
- OI_LS_RENAME1);
+ rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
if (status < 0) {
if (status != -ENOENT)
mlog_errno(status);
@@ -1136,7 +1162,8 @@ static int ocfs2_double_lock(struct ocfs2_super *osb,
}
/* lock id1 */
- status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
+ status = ocfs2_inode_lock_nested(inode1, bh1, 1,
+ rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
if (status < 0) {
/*
* An error return must mean that no cluster locks
@@ -1252,7 +1279,7 @@ static int ocfs2_rename(struct inode *old_dir,
/* if old and new are the same, this'll just do one lock. */
status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
- &new_dir_bh, new_dir);
+ &new_dir_bh, new_dir, 1);
if (status < 0) {
mlog_errno(status);
goto bail;

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