[mirror_ubuntu-artful-kernel.git] / fs / xfs / xfs_rename.c

/*
 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_format.h"
#include "xfs_log.h"
#include "xfs_trans.h"
#include "xfs_sb.h"
#include "xfs_ag.h"
#include "xfs_mount.h"
#include "xfs_da_btree.h"
#include "xfs_dir2_format.h"
#include "xfs_dir2.h"
#include "xfs_bmap_btree.h"
#include "xfs_dinode.h"
#include "xfs_inode.h"
#include "xfs_inode_item.h"
#include "xfs_bmap.h"
#include "xfs_bmap_util.h"
#include "xfs_error.h"
#include "xfs_quota.h"
#include "xfs_utils.h"
#include "xfs_trans_space.h"
#include "xfs_vnodeops.h"
#include "xfs_trace.h"


/*
 * Enter all inodes for a rename transaction into a sorted array.
 */
STATIC void
xfs_sort_for_rename(
	xfs_inode_t	*dp1,	/* in: old (source) directory inode */
	xfs_inode_t	*dp2,	/* in: new (target) directory inode */
	xfs_inode_t	*ip1,	/* in: inode of old entry */
	xfs_inode_t	*ip2,	/* in: inode of new entry, if it
				   already exists, NULL otherwise. */
	xfs_inode_t	**i_tab,/* out: array of inode returned, sorted */
	int		*num_inodes)  /* out: number of inodes in array */
{
	xfs_inode_t		*temp;
	int			i, j;

	/*
	 * i_tab contains a list of pointers to inodes.  We initialize
	 * the table here & we'll sort it.  We will then use it to
	 * order the acquisition of the inode locks.
	 *
	 * Note that the table may contain duplicates.  e.g., dp1 == dp2.
	 */
	i_tab[0] = dp1;
	i_tab[1] = dp2;
	i_tab[2] = ip1;
	if (ip2) {
		*num_inodes = 4;
		i_tab[3] = ip2;
	} else {
		*num_inodes = 3;
		i_tab[3] = NULL;
	}

	/*
	 * Sort the elements via bubble sort.  (Remember, there are at
	 * most 4 elements to sort, so this is adequate.)
	 */
	for (i = 0; i < *num_inodes; i++) {
		for (j = 1; j < *num_inodes; j++) {
			if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) {
				temp = i_tab[j];
				i_tab[j] = i_tab[j-1];
				i_tab[j-1] = temp;
			}
		}
	}
}

/*
 * xfs_rename
 */
int
xfs_rename(
	xfs_inode_t	*src_dp,
	struct xfs_name	*src_name,
	xfs_inode_t	*src_ip,
	xfs_inode_t	*target_dp,
	struct xfs_name	*target_name,
	xfs_inode_t	*target_ip)
{
	xfs_trans_t	*tp = NULL;
	xfs_mount_t	*mp = src_dp->i_mount;
	int		new_parent;		/* moving to a new dir */
	int		src_is_directory;	/* src_name is a directory */
	int		error;
	xfs_bmap_free_t free_list;
	xfs_fsblock_t   first_block;
	int		cancel_flags;
	int		committed;
	xfs_inode_t	*inodes[4];
	int		spaceres;
	int		num_inodes;

	trace_xfs_rename(src_dp, target_dp, src_name, target_name);

	new_parent = (src_dp != target_dp);
	src_is_directory = S_ISDIR(src_ip->i_d.di_mode);

	xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip,
				inodes, &num_inodes);

	xfs_bmap_init(&free_list, &first_block);
	tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME);
	cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
	spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len);
	error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0,
			XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
	if (error == ENOSPC) {
		spaceres = 0;
		error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0,
				XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
	}
	if (error) {
		xfs_trans_cancel(tp, 0);
		goto std_return;
	}

	/*
	 * Attach the dquots to the inodes
	 */
	error = xfs_qm_vop_rename_dqattach(inodes);
	if (error) {
		xfs_trans_cancel(tp, cancel_flags);
		goto std_return;
	}

	/*
	 * Lock all the participating inodes. Depending upon whether
	 * the target_name exists in the target directory, and
	 * whether the target directory is the same as the source
	 * directory, we can lock from 2 to 4 inodes.
	 */
	xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL);

	/*
	 * Join all the inodes to the transaction. From this point on,
	 * we can rely on either trans_commit or trans_cancel to unlock
	 * them.
	 */
	xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL);
	if (new_parent)
		xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL);
	xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL);
	if (target_ip)
		xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL);

	/*
	 * If we are using project inheritance, we only allow renames
	 * into our tree when the project IDs are the same; else the
	 * tree quota mechanism would be circumvented.
	 */
	if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
		     (xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) {
		error = XFS_ERROR(EXDEV);
		goto error_return;
	}

	/*
	 * Set up the target.
	 */
	if (target_ip == NULL) {
		/*
		 * If there's no space reservation, check the entry will
		 * fit before actually inserting it.
		 */
		error = xfs_dir_canenter(tp, target_dp, target_name, spaceres);
		if (error)
			goto error_return;
		/*
		 * If target does not exist and the rename crosses
		 * directories, adjust the target directory link count
		 * to account for the ".." reference from the new entry.
		 */
		error = xfs_dir_createname(tp, target_dp, target_name,
						src_ip->i_ino, &first_block,
						&free_list, spaceres);
		if (error == ENOSPC)
			goto error_return;
		if (error)
			goto abort_return;

		xfs_trans_ichgtime(tp, target_dp,
					XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);

		if (new_parent && src_is_directory) {
			error = xfs_bumplink(tp, target_dp);
			if (error)
				goto abort_return;
		}
	} else { /* target_ip != NULL */
		/*
		 * If target exists and it's a directory, check that both
		 * target and source are directories and that target can be
		 * destroyed, or that neither is a directory.
		 */
		if (S_ISDIR(target_ip->i_d.di_mode)) {
			/*
			 * Make sure target dir is empty.
			 */
			if (!(xfs_dir_isempty(target_ip)) ||
			    (target_ip->i_d.di_nlink > 2)) {
				error = XFS_ERROR(EEXIST);
				goto error_return;
			}
		}

		/*
		 * Link the source inode under the target name.
		 * If the source inode is a directory and we are moving
		 * it across directories, its ".." entry will be
		 * inconsistent until we replace that down below.
		 *
		 * In case there is already an entry with the same
		 * name at the destination directory, remove it first.
		 */
		error = xfs_dir_replace(tp, target_dp, target_name,
					src_ip->i_ino,
					&first_block, &free_list, spaceres);
		if (error)
			goto abort_return;

		xfs_trans_ichgtime(tp, target_dp,
					XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);

		/*
		 * Decrement the link count on the target since the target
		 * dir no longer points to it.
		 */
		error = xfs_droplink(tp, target_ip);
		if (error)
			goto abort_return;

		if (src_is_directory) {
			/*
			 * Drop the link from the old "." entry.
			 */
			error = xfs_droplink(tp, target_ip);
			if (error)
				goto abort_return;
		}
	} /* target_ip != NULL */

	/*
	 * Remove the source.
	 */
	if (new_parent && src_is_directory) {
		/*
		 * Rewrite the ".." entry to point to the new
		 * directory.
		 */
		error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot,
					target_dp->i_ino,
					&first_block, &free_list, spaceres);
		ASSERT(error != EEXIST);
		if (error)
			goto abort_return;
	}

	/*
	 * We always want to hit the ctime on the source inode.
	 *
	 * This isn't strictly required by the standards since the source
	 * inode isn't really being changed, but old unix file systems did
	 * it and some incremental backup programs won't work without it.
	 */
	xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG);
	xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE);

	/*
	 * Adjust the link count on src_dp.  This is necessary when
	 * renaming a directory, either within one parent when
	 * the target existed, or across two parent directories.
	 */
	if (src_is_directory && (new_parent || target_ip != NULL)) {

		/*
		 * Decrement link count on src_directory since the
		 * entry that's moved no longer points to it.
		 */
		error = xfs_droplink(tp, src_dp);
		if (error)
			goto abort_return;
	}

	error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino,
					&first_block, &free_list, spaceres);
	if (error)
		goto abort_return;

	xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
	xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
	if (new_parent)
		xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);

	/*
	 * If this is a synchronous mount, make sure that the
	 * rename transaction goes to disk before returning to
	 * the user.
	 */
	if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
		xfs_trans_set_sync(tp);
	}

	error = xfs_bmap_finish(&tp, &free_list, &committed);
	if (error) {
		xfs_bmap_cancel(&free_list);
		xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
				 XFS_TRANS_ABORT));
		goto std_return;
	}

	/*
	 * trans_commit will unlock src_ip, target_ip & decrement
	 * the vnode references.
	 */
	return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);

 abort_return:
	cancel_flags |= XFS_TRANS_ABORT;
 error_return:
	xfs_bmap_cancel(&free_list);
	xfs_trans_cancel(tp, cancel_flags);
 std_return:
	return error;
}
Commit	Line	Data
1da177e4	1	/*
7b718769 NS	2	* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
7b718769 NS	3	* All Rights Reserved.
1da177e4	4	*
7b718769 NS	5	* This program is free software; you can redistribute it and/or
7b718769 NS	6	* modify it under the terms of the GNU General Public License as
1da177e4 LT	7	* published by the Free Software Foundation.
1da177e4 LT	8	*
7b718769 NS	9	* This program is distributed in the hope that it would be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
1da177e4	13	*
7b718769 NS	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write the Free Software Foundation,
	16	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
1da177e4	17	*/
1da177e4	18	#include "xfs.h"
a844f451	19	#include "xfs_fs.h"
6ca1c906	20	#include "xfs_format.h"
1da177e4 LT	21	#include "xfs_log.h"
	22	#include "xfs_trans.h"
	23	#include "xfs_sb.h"
da353b0d	24	#include "xfs_ag.h"
1da177e4	25	#include "xfs_mount.h"
a844f451	26	#include "xfs_da_btree.h"
2b9ab5ab DC	27	#include "xfs_dir2_format.h"
2b9ab5ab DC	28	#include "xfs_dir2.h"
1da177e4	29	#include "xfs_bmap_btree.h"
1da177e4	30	#include "xfs_dinode.h"
1da177e4	31	#include "xfs_inode.h"
a844f451	32	#include "xfs_inode_item.h"
1da177e4	33	#include "xfs_bmap.h"
68988114	34	#include "xfs_bmap_util.h"
1da177e4 LT	35	#include "xfs_error.h"
1da177e4 LT	36	#include "xfs_quota.h"
1da177e4 LT	37	#include "xfs_utils.h"
1da177e4 LT	38	#include "xfs_trans_space.h"
a8272ce0	39	#include "xfs_vnodeops.h"
0b1b213f	40	#include "xfs_trace.h"
1da177e4 LT	41
1da177e4 LT	42
1da177e4	43	/*
cfa853e4	44	* Enter all inodes for a rename transaction into a sorted array.
1da177e4	45	*/
cfa853e4 CH	46	STATIC void
cfa853e4 CH	47	xfs_sort_for_rename(
556b8b16 BN	48	xfs_inode_t dp1, / in: old (source) directory inode */
	49	xfs_inode_t dp2, / in: new (target) directory inode */
	50	xfs_inode_t ip1, / in: inode of old entry */
cfa853e4	51	xfs_inode_t ip2, / in: inode of new entry, if it
1da177e4	52	already exists, NULL otherwise. */
556b8b16 BN	53	xfs_inode_t *i_tab,/ out: array of inode returned, sorted */
556b8b16 BN	54	int num_inodes) / out: number of inodes in array */
1da177e4	55	{
556b8b16	56	xfs_inode_t *temp;
1da177e4	57	int i, j;
1da177e4 LT	58
	59	/*
	60	* i_tab contains a list of pointers to inodes. We initialize
	61	* the table here & we'll sort it. We will then use it to
	62	* order the acquisition of the inode locks.
	63	*
	64	* Note that the table may contain duplicates. e.g., dp1 == dp2.
	65	*/
	66	i_tab[0] = dp1;
	67	i_tab[1] = dp2;
	68	i_tab[2] = ip1;
cfa853e4	69	if (ip2) {
1da177e4 LT	70	*num_inodes = 4;
1da177e4 LT	71	i_tab[3] = ip2;
cfa853e4 CH	72	} else {
	73	*num_inodes = 3;
	74	i_tab[3] = NULL;
1da177e4 LT	75	}
	76
	77	/*
	78	* Sort the elements via bubble sort. (Remember, there are at
	79	* most 4 elements to sort, so this is adequate.)
	80	*/
cfa853e4 CH	81	for (i = 0; i < *num_inodes; i++) {
cfa853e4 CH	82	for (j = 1; j < *num_inodes; j++) {
1da177e4 LT	83	if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) {
	84	temp = i_tab[j];
	85	i_tab[j] = i_tab[j-1];
	86	i_tab[j-1] = temp;
	87	}
	88	}
	89	}
1da177e4 LT	90	}
1da177e4 LT	91
1da177e4 LT	92	/*
	93	* xfs_rename
	94	*/
	95	int
	96	xfs_rename(
993386c1	97	xfs_inode_t *src_dp,
556b8b16 BN	98	struct xfs_name *src_name,
556b8b16 BN	99	xfs_inode_t *src_ip,
3937be5b	100	xfs_inode_t *target_dp,
cfa853e4 CH	101	struct xfs_name *target_name,
cfa853e4 CH	102	xfs_inode_t *target_ip)
1da177e4	103	{
cfa853e4	104	xfs_trans_t *tp = NULL;
993386c1	105	xfs_mount_t *mp = src_dp->i_mount;
1da177e4 LT	106	int new_parent; /* moving to a new dir */
	107	int src_is_directory; /* src_name is a directory */
	108	int error;
	109	xfs_bmap_free_t free_list;
	110	xfs_fsblock_t first_block;
	111	int cancel_flags;
	112	int committed;
	113	xfs_inode_t *inodes[4];
1da177e4	114	int spaceres;
1da177e4	115	int num_inodes;
1da177e4	116
cca28fb8	117	trace_xfs_rename(src_dp, target_dp, src_name, target_name);
1da177e4	118
cfa853e4	119	new_parent = (src_dp != target_dp);
abbede1b	120	src_is_directory = S_ISDIR(src_ip->i_d.di_mode);
1da177e4	121
cfa853e4 CH	122	xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip,
cfa853e4 CH	123	inodes, &num_inodes);
1da177e4	124
9d87c319	125	xfs_bmap_init(&free_list, &first_block);
1da177e4 LT	126	tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME);
1da177e4 LT	127	cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
556b8b16	128	spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len);
1da177e4 LT	129	error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0,
	130	XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
	131	if (error == ENOSPC) {
	132	spaceres = 0;
	133	error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0,
	134	XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
	135	}
	136	if (error) {
1da177e4	137	xfs_trans_cancel(tp, 0);
1ac74e01	138	goto std_return;
1da177e4 LT	139	}
	140
	141	/*
	142	* Attach the dquots to the inodes
	143	*/
7d095257 CH	144	error = xfs_qm_vop_rename_dqattach(inodes);
7d095257 CH	145	if (error) {
1da177e4	146	xfs_trans_cancel(tp, cancel_flags);
1ac74e01	147	goto std_return;
1da177e4 LT	148	}
	149
	150	/*
cfa853e4 CH	151	* Lock all the participating inodes. Depending upon whether
	152	* the target_name exists in the target directory, and
	153	* whether the target directory is the same as the source
	154	* directory, we can lock from 2 to 4 inodes.
	155	*/
	156	xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL);
	157
1da177e4 LT	158	/*
	159	* Join all the inodes to the transaction. From this point on,
	160	* we can rely on either trans_commit or trans_cancel to unlock
898621d5	161	* them.
1da177e4	162	*/
ddc3415a	163	xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL);
898621d5	164	if (new_parent)
ddc3415a CH	165	xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL);
ddc3415a CH	166	xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL);
898621d5	167	if (target_ip)
ddc3415a	168	xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL);
1da177e4	169
2175dd95 CH	170	/*
	171	* If we are using project inheritance, we only allow renames
	172	* into our tree when the project IDs are the same; else the
	173	* tree quota mechanism would be circumvented.
	174	*/
	175	if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
6743099c	176	(xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) {
2175dd95 CH	177	error = XFS_ERROR(EXDEV);
	178	goto error_return;
	179	}
	180
1da177e4 LT	181	/*
	182	* Set up the target.
	183	*/
	184	if (target_ip == NULL) {
	185	/*
	186	* If there's no space reservation, check the entry will
	187	* fit before actually inserting it.
	188	*/
556b8b16 BN	189	error = xfs_dir_canenter(tp, target_dp, target_name, spaceres);
556b8b16 BN	190	if (error)
1da177e4	191	goto error_return;
1da177e4 LT	192	/*
	193	* If target does not exist and the rename crosses
	194	* directories, adjust the target directory link count
	195	* to account for the ".." reference from the new entry.
	196	*/
f6c2d1fa	197	error = xfs_dir_createname(tp, target_dp, target_name,
556b8b16 BN	198	src_ip->i_ino, &first_block,
556b8b16 BN	199	&free_list, spaceres);
f6c2d1fa	200	if (error == ENOSPC)
1da177e4	201	goto error_return;
f6c2d1fa	202	if (error)
1da177e4	203	goto abort_return;
dcd79a14 DC	204
	205	xfs_trans_ichgtime(tp, target_dp,
	206	XFS_ICHGTIME_MOD \| XFS_ICHGTIME_CHG);
1da177e4 LT	207
	208	if (new_parent && src_is_directory) {
	209	error = xfs_bumplink(tp, target_dp);
f6c2d1fa	210	if (error)
1da177e4	211	goto abort_return;
1da177e4 LT	212	}
1da177e4 LT	213	} else { /* target_ip != NULL */
1da177e4 LT	214	/*
	215	* If target exists and it's a directory, check that both
	216	* target and source are directories and that target can be
	217	* destroyed, or that neither is a directory.
	218	*/
abbede1b	219	if (S_ISDIR(target_ip->i_d.di_mode)) {
1da177e4 LT	220	/*
	221	* Make sure target dir is empty.
	222	*/
f6c2d1fa	223	if (!(xfs_dir_isempty(target_ip)) \|\|
1da177e4 LT	224	(target_ip->i_d.di_nlink > 2)) {
1da177e4 LT	225	error = XFS_ERROR(EEXIST);
1da177e4 LT	226	goto error_return;
	227	}
	228	}
	229
	230	/*
	231	* Link the source inode under the target name.
	232	* If the source inode is a directory and we are moving
	233	* it across directories, its ".." entry will be
	234	* inconsistent until we replace that down below.
	235	*
	236	* In case there is already an entry with the same
	237	* name at the destination directory, remove it first.
	238	*/
f6c2d1fa	239	error = xfs_dir_replace(tp, target_dp, target_name,
556b8b16	240	src_ip->i_ino,
f6c2d1fa NS	241	&first_block, &free_list, spaceres);
f6c2d1fa NS	242	if (error)
1da177e4	243	goto abort_return;
dcd79a14 DC	244
	245	xfs_trans_ichgtime(tp, target_dp,
	246	XFS_ICHGTIME_MOD \| XFS_ICHGTIME_CHG);
1da177e4 LT	247
	248	/*
	249	* Decrement the link count on the target since the target
	250	* dir no longer points to it.
	251	*/
	252	error = xfs_droplink(tp, target_ip);
f6c2d1fa	253	if (error)
1da177e4	254	goto abort_return;
1da177e4 LT	255
	256	if (src_is_directory) {
	257	/*
	258	* Drop the link from the old "." entry.
	259	*/
	260	error = xfs_droplink(tp, target_ip);
f6c2d1fa	261	if (error)
1da177e4	262	goto abort_return;
1da177e4	263	}
1da177e4 LT	264	} /* target_ip != NULL */
	265
	266	/*
	267	* Remove the source.
	268	*/
	269	if (new_parent && src_is_directory) {
1da177e4 LT	270	/*
	271	* Rewrite the ".." entry to point to the new
	272	* directory.
	273	*/
556b8b16 BN	274	error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot,
556b8b16 BN	275	target_dp->i_ino,
f6c2d1fa	276	&first_block, &free_list, spaceres);
1da177e4	277	ASSERT(error != EEXIST);
f6c2d1fa	278	if (error)
1da177e4	279	goto abort_return;
1da177e4 LT	280	}
1da177e4 LT	281
8f8670bb CH	282	/*
	283	* We always want to hit the ctime on the source inode.
	284	*
	285	* This isn't strictly required by the standards since the source
	286	* inode isn't really being changed, but old unix file systems did
	287	* it and some incremental backup programs won't work without it.
	288	*/
dcd79a14	289	xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG);
05340d4a	290	xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE);
8f8670bb	291
1da177e4 LT	292	/*
	293	* Adjust the link count on src_dp. This is necessary when
	294	* renaming a directory, either within one parent when
	295	* the target existed, or across two parent directories.
	296	*/
	297	if (src_is_directory && (new_parent \|\| target_ip != NULL)) {
	298
	299	/*
	300	* Decrement link count on src_directory since the
	301	* entry that's moved no longer points to it.
	302	*/
	303	error = xfs_droplink(tp, src_dp);
f6c2d1fa	304	if (error)
1da177e4	305	goto abort_return;
1da177e4 LT	306	}
1da177e4 LT	307
556b8b16 BN	308	error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino,
556b8b16 BN	309	&first_block, &free_list, spaceres);
f6c2d1fa	310	if (error)
1da177e4	311	goto abort_return;
1da177e4	312
dcd79a14	313	xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD \| XFS_ICHGTIME_CHG);
1da177e4	314	xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
26c52951	315	if (new_parent)
1da177e4	316	xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);
1da177e4	317
1da177e4 LT	318	/*
	319	* If this is a synchronous mount, make sure that the
	320	* rename transaction goes to disk before returning to
	321	* the user.
	322	*/
	323	if (mp->m_flags & (XFS_MOUNT_WSYNC\|XFS_MOUNT_DIRSYNC)) {
	324	xfs_trans_set_sync(tp);
	325	}
	326
f7c99b6f	327	error = xfs_bmap_finish(&tp, &free_list, &committed);
1da177e4 LT	328	if (error) {
	329	xfs_bmap_cancel(&free_list);
	330	xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES \|
	331	XFS_TRANS_ABORT));
1da177e4 LT	332	goto std_return;
	333	}
	334
	335	/*
	336	* trans_commit will unlock src_ip, target_ip & decrement
	337	* the vnode references.
	338	*/
288699fe	339	return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
1da177e4 LT	340
	341	abort_return:
	342	cancel_flags \|= XFS_TRANS_ABORT;
1da177e4 LT	343	error_return:
	344	xfs_bmap_cancel(&free_list);
	345	xfs_trans_cancel(tp, cancel_flags);
288699fe CH	346	std_return:
288699fe CH	347	return error;
1da177e4	348	}