[people/ms/linux.git] / fs / xfs / xfs_attr_inactive.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
 * Copyright (c) 2013 Red Hat, Inc.
 * All Rights Reserved.
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_bit.h"
#include "xfs_mount.h"
#include "xfs_da_format.h"
#include "xfs_da_btree.h"
#include "xfs_inode.h"
#include "xfs_attr.h"
#include "xfs_attr_remote.h"
#include "xfs_trans.h"
#include "xfs_bmap.h"
#include "xfs_attr_leaf.h"
#include "xfs_quota.h"
#include "xfs_dir2.h"
#include "xfs_error.h"

/*
 * Invalidate any incore buffers associated with this remote attribute value
 * extent.   We never log remote attribute value buffers, which means that they
 * won't be attached to a transaction and are therefore safe to mark stale.
 * The actual bunmapi will be taken care of later.
 */
STATIC int
xfs_attr3_rmt_stale(
	struct xfs_inode	*dp,
	xfs_dablk_t		blkno,
	int			blkcnt)
{
	struct xfs_bmbt_irec	map;
	int			nmap;
	int			error;

	/*
	 * Roll through the "value", invalidating the attribute value's
	 * blocks.
	 */
	while (blkcnt > 0) {
		/*
		 * Try to remember where we decided to put the value.
		 */
		nmap = 1;
		error = xfs_bmapi_read(dp, (xfs_fileoff_t)blkno, blkcnt,
				       &map, &nmap, XFS_BMAPI_ATTRFORK);
		if (error)
			return error;
		if (XFS_IS_CORRUPT(dp->i_mount, nmap != 1))
			return -EFSCORRUPTED;

		/*
		 * Mark any incore buffers for the remote value as stale.  We
		 * never log remote attr value buffers, so the buffer should be
		 * easy to kill.
		 */
		error = xfs_attr_rmtval_stale(dp, &map, 0);
		if (error)
			return error;

		blkno += map.br_blockcount;
		blkcnt -= map.br_blockcount;
	}

	return 0;
}

/*
 * Invalidate all of the "remote" value regions pointed to by a particular
 * leaf block.
 * Note that we must release the lock on the buffer so that we are not
 * caught holding something that the logging code wants to flush to disk.
 */
STATIC int
xfs_attr3_leaf_inactive(
	struct xfs_trans		**trans,
	struct xfs_inode		*dp,
	struct xfs_buf			*bp)
{
	struct xfs_attr3_icleaf_hdr	ichdr;
	struct xfs_mount		*mp = bp->b_mount;
	struct xfs_attr_leafblock	*leaf = bp->b_addr;
	struct xfs_attr_leaf_entry	*entry;
	struct xfs_attr_leaf_name_remote *name_rmt;
	int				error = 0;
	int				i;

	xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf);

	/*
	 * Find the remote value extents for this leaf and invalidate their
	 * incore buffers.
	 */
	entry = xfs_attr3_leaf_entryp(leaf);
	for (i = 0; i < ichdr.count; entry++, i++) {
		int		blkcnt;

		if (!entry->nameidx || (entry->flags & XFS_ATTR_LOCAL))
			continue;

		name_rmt = xfs_attr3_leaf_name_remote(leaf, i);
		if (!name_rmt->valueblk)
			continue;

		blkcnt = xfs_attr3_rmt_blocks(dp->i_mount,
				be32_to_cpu(name_rmt->valuelen));
		error = xfs_attr3_rmt_stale(dp,
				be32_to_cpu(name_rmt->valueblk), blkcnt);
		if (error)
			goto err;
	}

	xfs_trans_brelse(*trans, bp);
err:
	return error;
}

/*
 * Recurse (gasp!) through the attribute nodes until we find leaves.
 * We're doing a depth-first traversal in order to invalidate everything.
 */
STATIC int
xfs_attr3_node_inactive(
	struct xfs_trans	**trans,
	struct xfs_inode	*dp,
	struct xfs_buf		*bp,
	int			level)
{
	struct xfs_mount	*mp = dp->i_mount;
	struct xfs_da_blkinfo	*info;
	xfs_dablk_t		child_fsb;
	xfs_daddr_t		parent_blkno, child_blkno;
	struct xfs_buf		*child_bp;
	struct xfs_da3_icnode_hdr ichdr;
	int			error, i;

	/*
	 * Since this code is recursive (gasp!) we must protect ourselves.
	 */
	if (level > XFS_DA_NODE_MAXDEPTH) {
		xfs_buf_mark_corrupt(bp);
		xfs_trans_brelse(*trans, bp);	/* no locks for later trans */
		return -EFSCORRUPTED;
	}

	xfs_da3_node_hdr_from_disk(dp->i_mount, &ichdr, bp->b_addr);
	parent_blkno = xfs_buf_daddr(bp);
	if (!ichdr.count) {
		xfs_trans_brelse(*trans, bp);
		return 0;
	}
	child_fsb = be32_to_cpu(ichdr.btree[0].before);
	xfs_trans_brelse(*trans, bp);	/* no locks for later trans */
	bp = NULL;

	/*
	 * If this is the node level just above the leaves, simply loop
	 * over the leaves removing all of them.  If this is higher up
	 * in the tree, recurse downward.
	 */
	for (i = 0; i < ichdr.count; i++) {
		/*
		 * Read the subsidiary block to see what we have to work with.
		 * Don't do this in a transaction.  This is a depth-first
		 * traversal of the tree so we may deal with many blocks
		 * before we come back to this one.
		 */
		error = xfs_da3_node_read(*trans, dp, child_fsb, &child_bp,
					  XFS_ATTR_FORK);
		if (error)
			return error;

		/* save for re-read later */
		child_blkno = xfs_buf_daddr(child_bp);

		/*
		 * Invalidate the subtree, however we have to.
		 */
		info = child_bp->b_addr;
		switch (info->magic) {
		case cpu_to_be16(XFS_DA_NODE_MAGIC):
		case cpu_to_be16(XFS_DA3_NODE_MAGIC):
			error = xfs_attr3_node_inactive(trans, dp, child_bp,
							level + 1);
			break;
		case cpu_to_be16(XFS_ATTR_LEAF_MAGIC):
		case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC):
			error = xfs_attr3_leaf_inactive(trans, dp, child_bp);
			break;
		default:
			xfs_buf_mark_corrupt(child_bp);
			xfs_trans_brelse(*trans, child_bp);
			error = -EFSCORRUPTED;
			break;
		}
		if (error)
			return error;

		/*
		 * Remove the subsidiary block from the cache and from the log.
		 */
		error = xfs_trans_get_buf(*trans, mp->m_ddev_targp,
				child_blkno,
				XFS_FSB_TO_BB(mp, mp->m_attr_geo->fsbcount), 0,
				&child_bp);
		if (error)
			return error;
		xfs_trans_binval(*trans, child_bp);
		child_bp = NULL;

		/*
		 * If we're not done, re-read the parent to get the next
		 * child block number.
		 */
		if (i + 1 < ichdr.count) {
			struct xfs_da3_icnode_hdr phdr;

			error = xfs_da3_node_read_mapped(*trans, dp,
					parent_blkno, &bp, XFS_ATTR_FORK);
			if (error)
				return error;
			xfs_da3_node_hdr_from_disk(dp->i_mount, &phdr,
						  bp->b_addr);
			child_fsb = be32_to_cpu(phdr.btree[i + 1].before);
			xfs_trans_brelse(*trans, bp);
			bp = NULL;
		}
		/*
		 * Atomically commit the whole invalidate stuff.
		 */
		error = xfs_trans_roll_inode(trans, dp);
		if (error)
			return  error;
	}

	return 0;
}

/*
 * Indiscriminately delete the entire attribute fork
 *
 * Recurse (gasp!) through the attribute nodes until we find leaves.
 * We're doing a depth-first traversal in order to invalidate everything.
 */
static int
xfs_attr3_root_inactive(
	struct xfs_trans	**trans,
	struct xfs_inode	*dp)
{
	struct xfs_mount	*mp = dp->i_mount;
	struct xfs_da_blkinfo	*info;
	struct xfs_buf		*bp;
	xfs_daddr_t		blkno;
	int			error;

	/*
	 * Read block 0 to see what we have to work with.
	 * We only get here if we have extents, since we remove
	 * the extents in reverse order the extent containing
	 * block 0 must still be there.
	 */
	error = xfs_da3_node_read(*trans, dp, 0, &bp, XFS_ATTR_FORK);
	if (error)
		return error;
	blkno = xfs_buf_daddr(bp);

	/*
	 * Invalidate the tree, even if the "tree" is only a single leaf block.
	 * This is a depth-first traversal!
	 */
	info = bp->b_addr;
	switch (info->magic) {
	case cpu_to_be16(XFS_DA_NODE_MAGIC):
	case cpu_to_be16(XFS_DA3_NODE_MAGIC):
		error = xfs_attr3_node_inactive(trans, dp, bp, 1);
		break;
	case cpu_to_be16(XFS_ATTR_LEAF_MAGIC):
	case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC):
		error = xfs_attr3_leaf_inactive(trans, dp, bp);
		break;
	default:
		error = -EFSCORRUPTED;
		xfs_buf_mark_corrupt(bp);
		xfs_trans_brelse(*trans, bp);
		break;
	}
	if (error)
		return error;

	/*
	 * Invalidate the incore copy of the root block.
	 */
	error = xfs_trans_get_buf(*trans, mp->m_ddev_targp, blkno,
			XFS_FSB_TO_BB(mp, mp->m_attr_geo->fsbcount), 0, &bp);
	if (error)
		return error;
	error = bp->b_error;
	if (error) {
		xfs_trans_brelse(*trans, bp);
		return error;
	}
	xfs_trans_binval(*trans, bp);	/* remove from cache */
	/*
	 * Commit the invalidate and start the next transaction.
	 */
	error = xfs_trans_roll_inode(trans, dp);

	return error;
}

/*
 * xfs_attr_inactive kills all traces of an attribute fork on an inode. It
 * removes both the on-disk and in-memory inode fork. Note that this also has to
 * handle the condition of inodes without attributes but with an attribute fork
 * configured, so we can't use xfs_inode_hasattr() here.
 *
 * The in-memory attribute fork is removed even on error.
 */
int
xfs_attr_inactive(
	struct xfs_inode	*dp)
{
	struct xfs_trans	*trans;
	struct xfs_mount	*mp;
	int			lock_mode = XFS_ILOCK_SHARED;
	int			error = 0;

	mp = dp->i_mount;
	ASSERT(! XFS_NOT_DQATTACHED(mp, dp));

	xfs_ilock(dp, lock_mode);
	if (!xfs_inode_has_attr_fork(dp))
		goto out_destroy_fork;
	xfs_iunlock(dp, lock_mode);

	lock_mode = 0;

	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_attrinval, 0, 0, 0, &trans);
	if (error)
		goto out_destroy_fork;

	lock_mode = XFS_ILOCK_EXCL;
	xfs_ilock(dp, lock_mode);

	if (!xfs_inode_has_attr_fork(dp))
		goto out_cancel;

	/*
	 * No need to make quota reservations here. We expect to release some
	 * blocks, not allocate, in the common case.
	 */
	xfs_trans_ijoin(trans, dp, 0);

	/*
	 * Invalidate and truncate the attribute fork extents. Make sure the
	 * fork actually has xattr blocks as otherwise the invalidation has no
	 * blocks to read and returns an error. In this case, just do the fork
	 * removal below.
	 */
	if (dp->i_af.if_nextents > 0) {
		error = xfs_attr3_root_inactive(&trans, dp);
		if (error)
			goto out_cancel;

		error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0);
		if (error)
			goto out_cancel;
	}

	/* Reset the attribute fork - this also destroys the in-core fork */
	xfs_attr_fork_remove(dp, trans);

	error = xfs_trans_commit(trans);
	xfs_iunlock(dp, lock_mode);
	return error;

out_cancel:
	xfs_trans_cancel(trans);
out_destroy_fork:
	/* kill the in-core attr fork before we drop the inode lock */
	xfs_ifork_zap_attr(dp);
	if (lock_mode)
		xfs_iunlock(dp, lock_mode);
	return error;
}
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
fde2227c DC	2	/*
	3	* Copyright (c) 2000-2005 Silicon Graphics, Inc.
	4	* Copyright (c) 2013 Red Hat, Inc.
	5	* All Rights Reserved.
fde2227c DC	6	*/
	7	#include "xfs.h"
	8	#include "xfs_fs.h"
70a9883c	9	#include "xfs_shared.h"
239880ef DC	10	#include "xfs_format.h"
	11	#include "xfs_log_format.h"
	12	#include "xfs_trans_resv.h"
fde2227c	13	#include "xfs_bit.h"
fde2227c	14	#include "xfs_mount.h"
57062787	15	#include "xfs_da_format.h"
fde2227c	16	#include "xfs_da_btree.h"
a4fbe6ab	17	#include "xfs_inode.h"
2b74b03c	18	#include "xfs_attr.h"
fde2227c	19	#include "xfs_attr_remote.h"
239880ef	20	#include "xfs_trans.h"
fde2227c	21	#include "xfs_bmap.h"
fde2227c	22	#include "xfs_attr_leaf.h"
fde2227c	23	#include "xfs_quota.h"
4bceb18f	24	#include "xfs_dir2.h"
a5155b87	25	#include "xfs_error.h"
fde2227c DC	26
fde2227c DC	27	/*
e8db2aaf DW	28	* Invalidate any incore buffers associated with this remote attribute value
	29	* extent. We never log remote attribute value buffers, which means that they
	30	* won't be attached to a transaction and are therefore safe to mark stale.
	31	* The actual bunmapi will be taken care of later.
fde2227c DC	32	*/
fde2227c DC	33	STATIC int
e8db2aaf	34	xfs_attr3_rmt_stale(
fde2227c DC	35	struct xfs_inode *dp,
	36	xfs_dablk_t blkno,
	37	int blkcnt)
	38	{
	39	struct xfs_bmbt_irec map;
fde2227c DC	40	int nmap;
	41	int error;
	42
	43	/*
	44	* Roll through the "value", invalidating the attribute value's
	45	* blocks.
	46	*/
0bb9d159	47	while (blkcnt > 0) {
fde2227c DC	48	/*
	49	* Try to remember where we decided to put the value.
	50	*/
	51	nmap = 1;
0bb9d159	52	error = xfs_bmapi_read(dp, (xfs_fileoff_t)blkno, blkcnt,
fde2227c	53	&map, &nmap, XFS_BMAPI_ATTRFORK);
e8db2aaf	54	if (error)
d99831ff	55	return error;
e8db2aaf DW	56	if (XFS_IS_CORRUPT(dp->i_mount, nmap != 1))
e8db2aaf DW	57	return -EFSCORRUPTED;
fde2227c DC	58
fde2227c DC	59	/*
e8db2aaf DW	60	* Mark any incore buffers for the remote value as stale. We
	61	* never log remote attr value buffers, so the buffer should be
	62	* easy to kill.
fde2227c	63	*/
e8db2aaf DW	64	error = xfs_attr_rmtval_stale(dp, &map, 0);
	65	if (error)
	66	return error;
fde2227c	67
0bb9d159 DW	68	blkno += map.br_blockcount;
0bb9d159 DW	69	blkcnt -= map.br_blockcount;
fde2227c DC	70	}
fde2227c DC	71
d99831ff	72	return 0;
fde2227c DC	73	}
	74
	75	/*
	76	* Invalidate all of the "remote" value regions pointed to by a particular
	77	* leaf block.
	78	* Note that we must release the lock on the buffer so that we are not
	79	* caught holding something that the logging code wants to flush to disk.
	80	*/
	81	STATIC int
	82	xfs_attr3_leaf_inactive(
0bb9d159 DW	83	struct xfs_trans **trans,
	84	struct xfs_inode *dp,
	85	struct xfs_buf *bp)
fde2227c	86	{
0bb9d159 DW	87	struct xfs_attr3_icleaf_hdr ichdr;
	88	struct xfs_mount *mp = bp->b_mount;
	89	struct xfs_attr_leafblock *leaf = bp->b_addr;
	90	struct xfs_attr_leaf_entry *entry;
fde2227c	91	struct xfs_attr_leaf_name_remote *name_rmt;
54027a49	92	int error = 0;
0bb9d159	93	int i;
fde2227c	94
2f661241	95	xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf);
fde2227c DC	96
fde2227c DC	97	/*
0bb9d159 DW	98	* Find the remote value extents for this leaf and invalidate their
0bb9d159 DW	99	* incore buffers.
fde2227c	100	*/
fde2227c DC	101	entry = xfs_attr3_leaf_entryp(leaf);
fde2227c DC	102	for (i = 0; i < ichdr.count; entry++, i++) {
0bb9d159	103	int blkcnt;
fde2227c	104
0bb9d159 DW	105	if (!entry->nameidx \|\| (entry->flags & XFS_ATTR_LOCAL))
0bb9d159 DW	106	continue;
fde2227c	107
0bb9d159 DW	108	name_rmt = xfs_attr3_leaf_name_remote(leaf, i);
	109	if (!name_rmt->valueblk)
	110	continue;
fde2227c	111
0bb9d159 DW	112	blkcnt = xfs_attr3_rmt_blocks(dp->i_mount,
	113	be32_to_cpu(name_rmt->valuelen));
	114	error = xfs_attr3_rmt_stale(dp,
	115	be32_to_cpu(name_rmt->valueblk), blkcnt);
	116	if (error)
	117	goto err;
fde2227c DC	118	}
fde2227c DC	119
0bb9d159 DW	120	xfs_trans_brelse(*trans, bp);
0bb9d159 DW	121	err:
fde2227c DC	122	return error;
	123	}
	124
	125	/*
	126	* Recurse (gasp!) through the attribute nodes until we find leaves.
	127	* We're doing a depth-first traversal in order to invalidate everything.
	128	*/
	129	STATIC int
	130	xfs_attr3_node_inactive(
51908ca7 CH	131	struct xfs_trans **trans,
	132	struct xfs_inode *dp,
	133	struct xfs_buf *bp,
	134	int level)
fde2227c	135	{
2911edb6	136	struct xfs_mount *mp = dp->i_mount;
51908ca7 CH	137	struct xfs_da_blkinfo *info;
	138	xfs_dablk_t child_fsb;
	139	xfs_daddr_t parent_blkno, child_blkno;
	140	struct xfs_buf *child_bp;
fde2227c	141	struct xfs_da3_icnode_hdr ichdr;
51908ca7	142	int error, i;
fde2227c DC	143
	144	/*
	145	* Since this code is recursive (gasp!) we must protect ourselves.
	146	*/
	147	if (level > XFS_DA_NODE_MAXDEPTH) {
8d57c216	148	xfs_buf_mark_corrupt(bp);
496b9bcd	149	xfs_trans_brelse(trans, bp); / no locks for later trans */
c2414ad6	150	return -EFSCORRUPTED;
fde2227c DC	151	}
fde2227c DC	152
51908ca7	153	xfs_da3_node_hdr_from_disk(dp->i_mount, &ichdr, bp->b_addr);
9343ee76	154	parent_blkno = xfs_buf_daddr(bp);
fde2227c DC	155	if (!ichdr.count) {
	156	xfs_trans_brelse(*trans, bp);
	157	return 0;
	158	}
51908ca7	159	child_fsb = be32_to_cpu(ichdr.btree[0].before);
fde2227c	160	xfs_trans_brelse(trans, bp); / no locks for later trans */
95ff0363	161	bp = NULL;
fde2227c DC	162
	163	/*
	164	* If this is the node level just above the leaves, simply loop
	165	* over the leaves removing all of them. If this is higher up
	166	* in the tree, recurse downward.
	167	*/
	168	for (i = 0; i < ichdr.count; i++) {
	169	/*
	170	* Read the subsidiary block to see what we have to work with.
	171	* Don't do this in a transaction. This is a depth-first
	172	* traversal of the tree so we may deal with many blocks
	173	* before we come back to this one.
	174	*/
02c57f0a	175	error = xfs_da3_node_read(*trans, dp, child_fsb, &child_bp,
a53efbd5	176	XFS_ATTR_FORK);
fde2227c	177	if (error)
d99831ff	178	return error;
fde2227c	179
a53efbd5	180	/* save for re-read later */
04fcad80	181	child_blkno = xfs_buf_daddr(child_bp);
fde2227c	182
a53efbd5 BF	183	/*
	184	* Invalidate the subtree, however we have to.
	185	*/
	186	info = child_bp->b_addr;
	187	switch (info->magic) {
	188	case cpu_to_be16(XFS_DA_NODE_MAGIC):
	189	case cpu_to_be16(XFS_DA3_NODE_MAGIC):
	190	error = xfs_attr3_node_inactive(trans, dp, child_bp,
	191	level + 1);
	192	break;
	193	case cpu_to_be16(XFS_ATTR_LEAF_MAGIC):
	194	case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC):
	195	error = xfs_attr3_leaf_inactive(trans, dp, child_bp);
	196	break;
	197	default:
8d57c216	198	xfs_buf_mark_corrupt(child_bp);
a53efbd5	199	xfs_trans_brelse(*trans, child_bp);
a5155b87	200	error = -EFSCORRUPTED;
a53efbd5	201	break;
fde2227c	202	}
a53efbd5 BF	203	if (error)
	204	return error;
	205
	206	/*
	207	* Remove the subsidiary block from the cache and from the log.
	208	*/
ce92464c	209	error = xfs_trans_get_buf(*trans, mp->m_ddev_targp,
2911edb6	210	child_blkno,
ce92464c DW	211	XFS_FSB_TO_BB(mp, mp->m_attr_geo->fsbcount), 0,
	212	&child_bp);
	213	if (error)
	214	return error;
a53efbd5	215	xfs_trans_binval(*trans, child_bp);
95ff0363	216	child_bp = NULL;
fde2227c DC	217
	218	/*
	219	* If we're not done, re-read the parent to get the next
	220	* child block number.
	221	*/
	222	if (i + 1 < ichdr.count) {
51908ca7 CH	223	struct xfs_da3_icnode_hdr phdr;
51908ca7 CH	224
02c57f0a CH	225	error = xfs_da3_node_read_mapped(*trans, dp,
02c57f0a CH	226	parent_blkno, &bp, XFS_ATTR_FORK);
fde2227c DC	227	if (error)
fde2227c DC	228	return error;
51908ca7 CH	229	xfs_da3_node_hdr_from_disk(dp->i_mount, &phdr,
	230	bp->b_addr);
	231	child_fsb = be32_to_cpu(phdr.btree[i + 1].before);
fde2227c	232	xfs_trans_brelse(*trans, bp);
95ff0363	233	bp = NULL;
fde2227c DC	234	}
	235	/*
	236	* Atomically commit the whole invalidate stuff.
	237	*/
411350df	238	error = xfs_trans_roll_inode(trans, dp);
fde2227c DC	239	if (error)
	240	return error;
	241	}
	242
	243	return 0;
	244	}
	245
	246	/*
	247	* Indiscriminately delete the entire attribute fork
	248	*
	249	* Recurse (gasp!) through the attribute nodes until we find leaves.
	250	* We're doing a depth-first traversal in order to invalidate everything.
	251	*/
0d5a75e9	252	static int
fde2227c DC	253	xfs_attr3_root_inactive(
	254	struct xfs_trans **trans,
	255	struct xfs_inode *dp)
	256	{
2911edb6	257	struct xfs_mount *mp = dp->i_mount;
fde2227c DC	258	struct xfs_da_blkinfo *info;
	259	struct xfs_buf *bp;
	260	xfs_daddr_t blkno;
	261	int error;
	262
	263	/*
	264	* Read block 0 to see what we have to work with.
	265	* We only get here if we have extents, since we remove
	266	* the extents in reverse order the extent containing
	267	* block 0 must still be there.
	268	*/
02c57f0a	269	error = xfs_da3_node_read(*trans, dp, 0, &bp, XFS_ATTR_FORK);
fde2227c DC	270	if (error)
fde2227c DC	271	return error;
9343ee76	272	blkno = xfs_buf_daddr(bp);
fde2227c DC	273
	274	/*
	275	* Invalidate the tree, even if the "tree" is only a single leaf block.
	276	* This is a depth-first traversal!
	277	*/
	278	info = bp->b_addr;
	279	switch (info->magic) {
	280	case cpu_to_be16(XFS_DA_NODE_MAGIC):
	281	case cpu_to_be16(XFS_DA3_NODE_MAGIC):
	282	error = xfs_attr3_node_inactive(trans, dp, bp, 1);
	283	break;
	284	case cpu_to_be16(XFS_ATTR_LEAF_MAGIC):
	285	case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC):
	286	error = xfs_attr3_leaf_inactive(trans, dp, bp);
	287	break;
	288	default:
c2414ad6	289	error = -EFSCORRUPTED;
8d57c216	290	xfs_buf_mark_corrupt(bp);
fde2227c DC	291	xfs_trans_brelse(*trans, bp);
	292	break;
	293	}
	294	if (error)
	295	return error;
	296
	297	/*
	298	* Invalidate the incore copy of the root block.
	299	*/
ce92464c DW	300	error = xfs_trans_get_buf(*trans, mp->m_ddev_targp, blkno,
	301	XFS_FSB_TO_BB(mp, mp->m_attr_geo->fsbcount), 0, &bp);
	302	if (error)
	303	return error;
2911edb6 CH	304	error = bp->b_error;
	305	if (error) {
	306	xfs_trans_brelse(*trans, bp);
fde2227c	307	return error;
2911edb6	308	}
fde2227c DC	309	xfs_trans_binval(trans, bp); / remove from cache */
	310	/*
	311	* Commit the invalidate and start the next transaction.
	312	*/
411350df	313	error = xfs_trans_roll_inode(trans, dp);
fde2227c DC	314
	315	return error;
	316	}
	317
6dfe5a04 DC	318	/*
	319	* xfs_attr_inactive kills all traces of an attribute fork on an inode. It
	320	* removes both the on-disk and in-memory inode fork. Note that this also has to
	321	* handle the condition of inodes without attributes but with an attribute fork
	322	* configured, so we can't use xfs_inode_hasattr() here.
	323	*
	324	* The in-memory attribute fork is removed even on error.
	325	*/
fde2227c	326	int
6dfe5a04 DC	327	xfs_attr_inactive(
6dfe5a04 DC	328	struct xfs_inode *dp)
fde2227c	329	{
6dfe5a04 DC	330	struct xfs_trans *trans;
6dfe5a04 DC	331	struct xfs_mount *mp;
6dfe5a04 DC	332	int lock_mode = XFS_ILOCK_SHARED;
6dfe5a04 DC	333	int error = 0;
fde2227c DC	334
	335	mp = dp->i_mount;
	336	ASSERT(! XFS_NOT_DQATTACHED(mp, dp));
	337
6dfe5a04	338	xfs_ilock(dp, lock_mode);
932b42c6	339	if (!xfs_inode_has_attr_fork(dp))
6dfe5a04 DC	340	goto out_destroy_fork;
6dfe5a04 DC	341	xfs_iunlock(dp, lock_mode);
fde2227c	342
6dfe5a04	343	lock_mode = 0;
253f4911 CH	344
253f4911 CH	345	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_attrinval, 0, 0, 0, &trans);
6dfe5a04	346	if (error)
253f4911	347	goto out_destroy_fork;
6dfe5a04 DC	348
6dfe5a04 DC	349	lock_mode = XFS_ILOCK_EXCL;
6dfe5a04 DC	350	xfs_ilock(dp, lock_mode);
6dfe5a04 DC	351
932b42c6	352	if (!xfs_inode_has_attr_fork(dp))
6dfe5a04	353	goto out_cancel;
fde2227c DC	354
	355	/*
	356	* No need to make quota reservations here. We expect to release some
	357	* blocks, not allocate, in the common case.
	358	*/
	359	xfs_trans_ijoin(trans, dp, 0);
	360
f66bf042 BF	361	/*
f66bf042 BF	362	* Invalidate and truncate the attribute fork extents. Make sure the
e45d7cb2	363	* fork actually has xattr blocks as otherwise the invalidation has no
f66bf042 BF	364	* blocks to read and returns an error. In this case, just do the fork
	365	* removal below.
	366	*/
e45d7cb2	367	if (dp->i_af.if_nextents > 0) {
6dfe5a04 DC	368	error = xfs_attr3_root_inactive(&trans, dp);
	369	if (error)
	370	goto out_cancel;
	371
	372	error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0);
	373	if (error)
	374	goto out_cancel;
fde2227c	375	}
fde2227c	376
6dfe5a04 DC	377	/* Reset the attribute fork - this also destroys the in-core fork */
6dfe5a04 DC	378	xfs_attr_fork_remove(dp, trans);
fde2227c	379
70393313	380	error = xfs_trans_commit(trans);
6dfe5a04	381	xfs_iunlock(dp, lock_mode);
d99831ff	382	return error;
fde2227c	383
6dfe5a04	384	out_cancel:
4906e215	385	xfs_trans_cancel(trans);
6dfe5a04 DC	386	out_destroy_fork:
6dfe5a04 DC	387	/* kill the in-core attr fork before we drop the inode lock */
e45d7cb2	388	xfs_ifork_zap_attr(dp);
6dfe5a04 DC	389	if (lock_mode)
6dfe5a04 DC	390	xfs_iunlock(dp, lock_mode);
d99831ff	391	return error;
fde2227c	392	}