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jfs: clean up jfs_rename and fix out of order unlock

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The end of jfs_rename(), which is also used by the error paths,
included a call to IWRITE_UNLOCK(new_ip) after labels out1, out2
and out3. If we come in through these labels, IWRITE_LOCK() has not
been called yet.

In moving that call to the correct spot, I also moved some
exceptional truncate code earlier as well, since the early error
paths don't need to deal with it, and I renamed out4: to out_tx: so
a future patch by Jan Kara doesn't need to deal with renumbering or
confusing out-of-order labels.

Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
This commit is contained in:
Dave Kleikamp 2015-07-15 12:52:47 -05:00
parent f7f31adf07
commit 2645695571
1 changed files with 13 additions and 14 deletions
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27
fs/jfs/namei.c
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@ -1161,7 +1161,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rc = dtModify(tid, new_dir, &new_dname, &ino,
old_ip->i_ino, JFS_RENAME);
if (rc)
goto out4;
goto out_tx;
drop_nlink(new_ip);
if (S_ISDIR(new_ip->i_mode)) {
drop_nlink(new_ip);
@ -1186,7 +1186,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if ((new_size = commitZeroLink(tid, new_ip)) < 0) {
txAbort(tid, 1); /* Marks FS Dirty */
rc = new_size;
goto out4;
goto out_tx;
}
tblk = tid_to_tblock(tid);
tblk->xflag |= COMMIT_DELETE;
@ -1204,7 +1204,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (rc) {
jfs_err("jfs_rename didn't expect dtSearch to fail "
"w/rc = %d", rc);
goto out4;
goto out_tx;
}
ino = old_ip->i_ino;
@ -1212,7 +1212,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (rc) {
if (rc == -EIO)
jfs_err("jfs_rename: dtInsert returned -EIO");
goto out4;
goto out_tx;
}
if (S_ISDIR(old_ip->i_mode))
inc_nlink(new_dir);
@ -1227,7 +1227,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
jfs_err("jfs_rename did not expect dtDelete to return rc = %d",
rc);
txAbort(tid, 1); /* Marks Filesystem dirty */
goto out4;
goto out_tx;
}
if (S_ISDIR(old_ip->i_mode)) {
drop_nlink(old_dir);
@ -1286,7 +1286,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
rc = txCommit(tid, ipcount, iplist, commit_flag);
out4:
out_tx:
txEnd(tid);
if (new_ip)
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
@ -1309,13 +1309,6 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
}
if (new_ip && (new_ip->i_nlink == 0))
set_cflag(COMMIT_Nolink, new_ip);
out3:
free_UCSname(&new_dname);
out2:
free_UCSname(&old_dname);
out1:
if (new_ip && !S_ISDIR(new_ip->i_mode))
IWRITE_UNLOCK(new_ip);
/*
* Truncating the directory index table is not guaranteed. It
* may need to be done iteratively
@ -1326,7 +1319,13 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
clear_cflag(COMMIT_Stale, old_dir);
}
if (new_ip && !S_ISDIR(new_ip->i_mode))
IWRITE_UNLOCK(new_ip);
out3:
free_UCSname(&new_dname);
out2:
free_UCSname(&old_dname);
out1:
jfs_info("jfs_rename: returning %d", rc);
return rc;
}