[linux-block.git] / fs / xfs / xfs_symlink.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
 * Copyright (c) 2012-2013 Red Hat, Inc.
 * All rights reserved.
 */
#include "xfs.h"
#include "xfs_shared.h"
#include "xfs_fs.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_dir2.h"
#include "xfs_inode.h"
#include "xfs_bmap.h"
#include "xfs_bmap_btree.h"
#include "xfs_quota.h"
#include "xfs_symlink.h"
#include "xfs_trans_space.h"
#include "xfs_trace.h"
#include "xfs_trans.h"
#include "xfs_ialloc.h"
#include "xfs_error.h"
#include "xfs_health.h"
#include "xfs_symlink_remote.h"
#include "xfs_parent.h"
#include "xfs_defer.h"

int
xfs_readlink(
	struct xfs_inode	*ip,
	char			*link)
{
	struct xfs_mount	*mp = ip->i_mount;
	xfs_fsize_t		pathlen;
	int			error;

	trace_xfs_readlink(ip);

	if (xfs_is_shutdown(mp))
		return -EIO;
	if (xfs_ifork_zapped(ip, XFS_DATA_FORK))
		return -EIO;

	xfs_ilock(ip, XFS_ILOCK_SHARED);

	pathlen = ip->i_disk_size;
	if (!pathlen)
		goto out_corrupt;

	if (pathlen < 0 || pathlen > XFS_SYMLINK_MAXLEN) {
		xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)",
			 __func__, (unsigned long long) ip->i_ino,
			 (long long) pathlen);
		ASSERT(0);
		goto out_corrupt;
	}

	if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
		/*
		 * The VFS crashes on a NULL pointer, so return -EFSCORRUPTED
		 * if if_data is junk.
		 */
		if (XFS_IS_CORRUPT(ip->i_mount, !ip->i_df.if_data))
			goto out_corrupt;

		memcpy(link, ip->i_df.if_data, pathlen + 1);
		error = 0;
	} else {
		error = xfs_symlink_remote_read(ip, link);
	}

	xfs_iunlock(ip, XFS_ILOCK_SHARED);
	return error;
 out_corrupt:
	xfs_iunlock(ip, XFS_ILOCK_SHARED);
	xfs_inode_mark_sick(ip, XFS_SICK_INO_SYMLINK);
	return -EFSCORRUPTED;
}

int
xfs_symlink(
	struct mnt_idmap	*idmap,
	struct xfs_inode	*dp,
	struct xfs_name		*link_name,
	const char		*target_path,
	umode_t			mode,
	struct xfs_inode	**ipp)
{
	struct xfs_mount	*mp = dp->i_mount;
	struct xfs_icreate_args	args = {
		.idmap		= idmap,
		.pip		= dp,
		.mode		= S_IFLNK | (mode & ~S_IFMT),
	};
	struct xfs_dir_update	du = {
		.dp		= dp,
		.name		= link_name,
	};
	struct xfs_trans	*tp = NULL;
	int			error = 0;
	int			pathlen;
	bool                    unlock_dp_on_error = false;
	xfs_filblks_t		fs_blocks;
	struct xfs_dquot	*udqp;
	struct xfs_dquot	*gdqp;
	struct xfs_dquot	*pdqp;
	uint			resblks;
	xfs_ino_t		ino;

	*ipp = NULL;

	trace_xfs_symlink(dp, link_name);

	if (xfs_is_shutdown(mp))
		return -EIO;

	/*
	 * Check component lengths of the target path name.
	 */
	pathlen = strlen(target_path);
	if (pathlen >= XFS_SYMLINK_MAXLEN)      /* total string too long */
		return -ENAMETOOLONG;
	ASSERT(pathlen > 0);

	/* Make sure that we have allocated dquot(s) on disk. */
	error = xfs_icreate_dqalloc(&args, &udqp, &gdqp, &pdqp);
	if (error)
		return error;

	/*
	 * The symlink will fit into the inode data fork?
	 * If there are no parent pointers, then there wont't be any attributes.
	 * So we get the whole variable part, and do not need to reserve extra
	 * blocks.  Otherwise, we need to reserve the blocks.
	 */
	if (pathlen <= XFS_LITINO(mp) && !xfs_has_parent(mp))
		fs_blocks = 0;
	else
		fs_blocks = xfs_symlink_blocks(mp, pathlen);
	resblks = xfs_symlink_space_res(mp, link_name->len, fs_blocks);

	error = xfs_parent_start(mp, &du.ppargs);
	if (error)
		goto out_release_dquots;

	error = xfs_trans_alloc_icreate(mp, &M_RES(mp)->tr_symlink, udqp, gdqp,
			pdqp, resblks, &tp);
	if (error)
		goto out_parent;

	xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
	unlock_dp_on_error = true;

	/*
	 * Check whether the directory allows new symlinks or not.
	 */
	if (dp->i_diflags & XFS_DIFLAG_NOSYMLINKS) {
		error = -EPERM;
		goto out_trans_cancel;
	}

	/*
	 * Allocate an inode for the symlink.
	 */
	error = xfs_dialloc(&tp, &args, &ino);
	if (!error)
		error = xfs_icreate(tp, ino, &args, &du.ip);
	if (error)
		goto out_trans_cancel;

	/*
	 * Now we join the directory inode to the transaction.  We do not do it
	 * earlier because xfs_dir_ialloc might commit the previous transaction
	 * (and release all the locks).  An error from here on will result in
	 * the transaction cancel unlocking dp so don't do it explicitly in the
	 * error path.
	 */
	xfs_trans_ijoin(tp, dp, 0);

	/*
	 * Also attach the dquot(s) to it, if applicable.
	 */
	xfs_qm_vop_create_dqattach(tp, du.ip, udqp, gdqp, pdqp);

	resblks -= XFS_IALLOC_SPACE_RES(mp);
	error = xfs_symlink_write_target(tp, du.ip, du.ip->i_ino, target_path,
			pathlen, fs_blocks, resblks);
	if (error)
		goto out_trans_cancel;
	resblks -= fs_blocks;
	i_size_write(VFS_I(du.ip), du.ip->i_disk_size);

	/*
	 * Create the directory entry for the symlink.
	 */
	error = xfs_dir_create_child(tp, resblks, &du);
	if (error)
		goto out_trans_cancel;

	/*
	 * If this is a synchronous mount, make sure that the
	 * symlink transaction goes to disk before returning to
	 * the user.
	 */
	if (xfs_has_wsync(mp) || xfs_has_dirsync(mp))
		xfs_trans_set_sync(tp);

	error = xfs_trans_commit(tp);
	if (error)
		goto out_release_inode;

	xfs_qm_dqrele(udqp);
	xfs_qm_dqrele(gdqp);
	xfs_qm_dqrele(pdqp);

	*ipp = du.ip;
	xfs_iunlock(du.ip, XFS_ILOCK_EXCL);
	xfs_iunlock(dp, XFS_ILOCK_EXCL);
	xfs_parent_finish(mp, du.ppargs);
	return 0;

out_trans_cancel:
	xfs_trans_cancel(tp);
out_release_inode:
	/*
	 * Wait until after the current transaction is aborted to finish the
	 * setup of the inode and release the inode.  This prevents recursive
	 * transactions and deadlocks from xfs_inactive.
	 */
	if (du.ip) {
		xfs_iunlock(du.ip, XFS_ILOCK_EXCL);
		xfs_finish_inode_setup(du.ip);
		xfs_irele(du.ip);
	}
out_parent:
	xfs_parent_finish(mp, du.ppargs);
out_release_dquots:
	xfs_qm_dqrele(udqp);
	xfs_qm_dqrele(gdqp);
	xfs_qm_dqrele(pdqp);

	if (unlock_dp_on_error)
		xfs_iunlock(dp, XFS_ILOCK_EXCL);
	return error;
}

/*
 * Free a symlink that has blocks associated with it.
 *
 * Note: zero length symlinks are not allowed to exist. When we set the size to
 * zero, also change it to a regular file so that it does not get written to
 * disk as a zero length symlink. The inode is on the unlinked list already, so
 * userspace cannot find this inode anymore, so this change is not user visible
 * but allows us to catch corrupt zero-length symlinks in the verifiers.
 */
STATIC int
xfs_inactive_symlink_rmt(
	struct xfs_inode	*ip)
{
	struct xfs_mount	*mp = ip->i_mount;
	struct xfs_trans	*tp;
	int			error;

	ASSERT(!xfs_need_iread_extents(&ip->i_df));
	/*
	 * We're freeing a symlink that has some
	 * blocks allocated to it.  Free the
	 * blocks here.  We know that we've got
	 * either 1 or 2 extents and that we can
	 * free them all in one bunmapi call.
	 */
	ASSERT(ip->i_df.if_nextents > 0 && ip->i_df.if_nextents <= 2);

	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
	if (error)
		return error;

	xfs_ilock(ip, XFS_ILOCK_EXCL);
	xfs_trans_ijoin(tp, ip, 0);

	/*
	 * Lock the inode, fix the size, turn it into a regular file and join it
	 * to the transaction.  Hold it so in the normal path, we still have it
	 * locked for the second transaction.  In the error paths we need it
	 * held so the cancel won't rele it, see below.
	 */
	ip->i_disk_size = 0;
	VFS_I(ip)->i_mode = (VFS_I(ip)->i_mode & ~S_IFMT) | S_IFREG;
	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);

	error = xfs_symlink_remote_truncate(tp, ip);
	if (error)
		goto error_trans_cancel;

	error = xfs_trans_commit(tp);
	if (error) {
		ASSERT(xfs_is_shutdown(mp));
		goto error_unlock;
	}

	/*
	 * Remove the memory for extent descriptions (just bookkeeping).
	 */
	if (ip->i_df.if_bytes)
		xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
	ASSERT(ip->i_df.if_bytes == 0);

	xfs_iunlock(ip, XFS_ILOCK_EXCL);
	return 0;

error_trans_cancel:
	xfs_trans_cancel(tp);
error_unlock:
	xfs_iunlock(ip, XFS_ILOCK_EXCL);
	return error;
}

/*
 * xfs_inactive_symlink - free a symlink
 */
int
xfs_inactive_symlink(
	struct xfs_inode	*ip)
{
	struct xfs_mount	*mp = ip->i_mount;
	int			pathlen;

	trace_xfs_inactive_symlink(ip);

	if (xfs_is_shutdown(mp))
		return -EIO;

	xfs_ilock(ip, XFS_ILOCK_EXCL);
	pathlen = (int)ip->i_disk_size;
	ASSERT(pathlen);

	if (pathlen <= 0 || pathlen > XFS_SYMLINK_MAXLEN) {
		xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)",
			 __func__, (unsigned long long)ip->i_ino, pathlen);
		xfs_iunlock(ip, XFS_ILOCK_EXCL);
		ASSERT(0);
		xfs_inode_mark_sick(ip, XFS_SICK_INO_SYMLINK);
		return -EFSCORRUPTED;
	}

	/*
	 * Inline fork state gets removed by xfs_difree() so we have nothing to
	 * do here in that case.
	 */
	if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
		xfs_iunlock(ip, XFS_ILOCK_EXCL);
		return 0;
	}

	xfs_iunlock(ip, XFS_ILOCK_EXCL);

	/* remove the remote symlink */
	return xfs_inactive_symlink_rmt(ip);
}
Commit	Line	Data
	1	// SPDX-License-Identifier: GPL-2.0
	2	/*
	3	* Copyright (c) 2000-2006 Silicon Graphics, Inc.
	4	* Copyright (c) 2012-2013 Red Hat, Inc.
	5	* All rights reserved.
	6	*/
	7	#include "xfs.h"
	8	#include "xfs_shared.h"
	9	#include "xfs_fs.h"
	10	#include "xfs_format.h"
	11	#include "xfs_log_format.h"
	12	#include "xfs_trans_resv.h"
	13	#include "xfs_bit.h"
	14	#include "xfs_mount.h"
	15	#include "xfs_dir2.h"
	16	#include "xfs_inode.h"
	17	#include "xfs_bmap.h"
	18	#include "xfs_bmap_btree.h"
	19	#include "xfs_quota.h"
	20	#include "xfs_symlink.h"
	21	#include "xfs_trans_space.h"
	22	#include "xfs_trace.h"
	23	#include "xfs_trans.h"
	24	#include "xfs_ialloc.h"
	25	#include "xfs_error.h"
	26	#include "xfs_health.h"
	27	#include "xfs_symlink_remote.h"
	28	#include "xfs_parent.h"
	29	#include "xfs_defer.h"
	30
	31	int
	32	xfs_readlink(
	33	struct xfs_inode *ip,
	34	char *link)
	35	{
	36	struct xfs_mount *mp = ip->i_mount;
	37	xfs_fsize_t pathlen;
	38	int error;
	39
	40	trace_xfs_readlink(ip);
	41
	42	if (xfs_is_shutdown(mp))
	43	return -EIO;
	44	if (xfs_ifork_zapped(ip, XFS_DATA_FORK))
	45	return -EIO;
	46
	47	xfs_ilock(ip, XFS_ILOCK_SHARED);
	48
	49	pathlen = ip->i_disk_size;
	50	if (!pathlen)
	51	goto out_corrupt;
	52
	53	if (pathlen < 0 \|\| pathlen > XFS_SYMLINK_MAXLEN) {
	54	xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)",
	55	__func__, (unsigned long long) ip->i_ino,
	56	(long long) pathlen);
	57	ASSERT(0);
	58	goto out_corrupt;
	59	}
	60
	61	if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
	62	/*
	63	* The VFS crashes on a NULL pointer, so return -EFSCORRUPTED
	64	* if if_data is junk.
	65	*/
	66	if (XFS_IS_CORRUPT(ip->i_mount, !ip->i_df.if_data))
	67	goto out_corrupt;
	68
	69	memcpy(link, ip->i_df.if_data, pathlen + 1);
	70	error = 0;
	71	} else {
	72	error = xfs_symlink_remote_read(ip, link);
	73	}
	74
	75	xfs_iunlock(ip, XFS_ILOCK_SHARED);
	76	return error;
	77	out_corrupt:
	78	xfs_iunlock(ip, XFS_ILOCK_SHARED);
	79	xfs_inode_mark_sick(ip, XFS_SICK_INO_SYMLINK);
	80	return -EFSCORRUPTED;
	81	}
	82
	83	int
	84	xfs_symlink(
	85	struct mnt_idmap *idmap,
	86	struct xfs_inode *dp,
	87	struct xfs_name *link_name,
	88	const char *target_path,
	89	umode_t mode,
	90	struct xfs_inode **ipp)
	91	{
	92	struct xfs_mount *mp = dp->i_mount;
	93	struct xfs_icreate_args args = {
	94	.idmap = idmap,
	95	.pip = dp,
	96	.mode = S_IFLNK \| (mode & ~S_IFMT),
	97	};
	98	struct xfs_dir_update du = {
	99	.dp = dp,
	100	.name = link_name,
	101	};
	102	struct xfs_trans *tp = NULL;
	103	int error = 0;
	104	int pathlen;
	105	bool unlock_dp_on_error = false;
	106	xfs_filblks_t fs_blocks;
	107	struct xfs_dquot *udqp;
	108	struct xfs_dquot *gdqp;
	109	struct xfs_dquot *pdqp;
	110	uint resblks;
	111	xfs_ino_t ino;
	112
	113	*ipp = NULL;
	114
	115	trace_xfs_symlink(dp, link_name);
	116
	117	if (xfs_is_shutdown(mp))
	118	return -EIO;
	119
	120	/*
	121	* Check component lengths of the target path name.
	122	*/
	123	pathlen = strlen(target_path);
	124	if (pathlen >= XFS_SYMLINK_MAXLEN) /* total string too long */
	125	return -ENAMETOOLONG;
	126	ASSERT(pathlen > 0);
	127
	128	/* Make sure that we have allocated dquot(s) on disk. */
	129	error = xfs_icreate_dqalloc(&args, &udqp, &gdqp, &pdqp);
	130	if (error)
	131	return error;
	132
	133	/*
	134	* The symlink will fit into the inode data fork?
	135	* If there are no parent pointers, then there wont't be any attributes.
	136	* So we get the whole variable part, and do not need to reserve extra
	137	* blocks. Otherwise, we need to reserve the blocks.
	138	*/
	139	if (pathlen <= XFS_LITINO(mp) && !xfs_has_parent(mp))
	140	fs_blocks = 0;
	141	else
	142	fs_blocks = xfs_symlink_blocks(mp, pathlen);
	143	resblks = xfs_symlink_space_res(mp, link_name->len, fs_blocks);
	144
	145	error = xfs_parent_start(mp, &du.ppargs);
	146	if (error)
	147	goto out_release_dquots;
	148
	149	error = xfs_trans_alloc_icreate(mp, &M_RES(mp)->tr_symlink, udqp, gdqp,
	150	pdqp, resblks, &tp);
	151	if (error)
	152	goto out_parent;
	153
	154	xfs_ilock(dp, XFS_ILOCK_EXCL \| XFS_ILOCK_PARENT);
	155	unlock_dp_on_error = true;
	156
	157	/*
	158	* Check whether the directory allows new symlinks or not.
	159	*/
	160	if (dp->i_diflags & XFS_DIFLAG_NOSYMLINKS) {
	161	error = -EPERM;
	162	goto out_trans_cancel;
	163	}
	164
	165	/*
	166	* Allocate an inode for the symlink.
	167	*/
	168	error = xfs_dialloc(&tp, &args, &ino);
	169	if (!error)
	170	error = xfs_icreate(tp, ino, &args, &du.ip);
	171	if (error)
	172	goto out_trans_cancel;
	173
	174	/*
	175	* Now we join the directory inode to the transaction. We do not do it
	176	* earlier because xfs_dir_ialloc might commit the previous transaction
	177	* (and release all the locks). An error from here on will result in
	178	* the transaction cancel unlocking dp so don't do it explicitly in the
	179	* error path.
	180	*/
	181	xfs_trans_ijoin(tp, dp, 0);
	182
	183	/*
	184	* Also attach the dquot(s) to it, if applicable.
	185	*/
	186	xfs_qm_vop_create_dqattach(tp, du.ip, udqp, gdqp, pdqp);
	187
	188	resblks -= XFS_IALLOC_SPACE_RES(mp);
	189	error = xfs_symlink_write_target(tp, du.ip, du.ip->i_ino, target_path,
	190	pathlen, fs_blocks, resblks);
	191	if (error)
	192	goto out_trans_cancel;
	193	resblks -= fs_blocks;
	194	i_size_write(VFS_I(du.ip), du.ip->i_disk_size);
	195
	196	/*
	197	* Create the directory entry for the symlink.
	198	*/
	199	error = xfs_dir_create_child(tp, resblks, &du);
	200	if (error)
	201	goto out_trans_cancel;
	202
	203	/*
	204	* If this is a synchronous mount, make sure that the
	205	* symlink transaction goes to disk before returning to
	206	* the user.
	207	*/
	208	if (xfs_has_wsync(mp) \|\| xfs_has_dirsync(mp))
	209	xfs_trans_set_sync(tp);
	210
	211	error = xfs_trans_commit(tp);
	212	if (error)
	213	goto out_release_inode;
	214
	215	xfs_qm_dqrele(udqp);
	216	xfs_qm_dqrele(gdqp);
	217	xfs_qm_dqrele(pdqp);
	218
	219	*ipp = du.ip;
	220	xfs_iunlock(du.ip, XFS_ILOCK_EXCL);
	221	xfs_iunlock(dp, XFS_ILOCK_EXCL);
	222	xfs_parent_finish(mp, du.ppargs);
	223	return 0;
	224
	225	out_trans_cancel:
	226	xfs_trans_cancel(tp);
	227	out_release_inode:
	228	/*
	229	* Wait until after the current transaction is aborted to finish the
	230	* setup of the inode and release the inode. This prevents recursive
	231	* transactions and deadlocks from xfs_inactive.
	232	*/
	233	if (du.ip) {
	234	xfs_iunlock(du.ip, XFS_ILOCK_EXCL);
	235	xfs_finish_inode_setup(du.ip);
	236	xfs_irele(du.ip);
	237	}
	238	out_parent:
	239	xfs_parent_finish(mp, du.ppargs);
	240	out_release_dquots:
	241	xfs_qm_dqrele(udqp);
	242	xfs_qm_dqrele(gdqp);
	243	xfs_qm_dqrele(pdqp);
	244
	245	if (unlock_dp_on_error)
	246	xfs_iunlock(dp, XFS_ILOCK_EXCL);
	247	return error;
	248	}
	249
	250	/*
	251	* Free a symlink that has blocks associated with it.
	252	*
	253	* Note: zero length symlinks are not allowed to exist. When we set the size to
	254	* zero, also change it to a regular file so that it does not get written to
	255	* disk as a zero length symlink. The inode is on the unlinked list already, so
	256	* userspace cannot find this inode anymore, so this change is not user visible
	257	* but allows us to catch corrupt zero-length symlinks in the verifiers.
	258	*/
	259	STATIC int
	260	xfs_inactive_symlink_rmt(
	261	struct xfs_inode *ip)
	262	{
	263	struct xfs_mount *mp = ip->i_mount;
	264	struct xfs_trans *tp;
	265	int error;
	266
	267	ASSERT(!xfs_need_iread_extents(&ip->i_df));
	268	/*
	269	* We're freeing a symlink that has some
	270	* blocks allocated to it. Free the
	271	* blocks here. We know that we've got
	272	* either 1 or 2 extents and that we can
	273	* free them all in one bunmapi call.
	274	*/
	275	ASSERT(ip->i_df.if_nextents > 0 && ip->i_df.if_nextents <= 2);
	276
	277	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);
	278	if (error)
	279	return error;
	280
	281	xfs_ilock(ip, XFS_ILOCK_EXCL);
	282	xfs_trans_ijoin(tp, ip, 0);
	283
	284	/*
	285	* Lock the inode, fix the size, turn it into a regular file and join it
	286	* to the transaction. Hold it so in the normal path, we still have it
	287	* locked for the second transaction. In the error paths we need it
	288	* held so the cancel won't rele it, see below.
	289	*/
	290	ip->i_disk_size = 0;
	291	VFS_I(ip)->i_mode = (VFS_I(ip)->i_mode & ~S_IFMT) \| S_IFREG;
	292	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
	293
	294	error = xfs_symlink_remote_truncate(tp, ip);
	295	if (error)
	296	goto error_trans_cancel;
	297
	298	error = xfs_trans_commit(tp);
	299	if (error) {
	300	ASSERT(xfs_is_shutdown(mp));
	301	goto error_unlock;
	302	}
	303
	304	/*
	305	* Remove the memory for extent descriptions (just bookkeeping).
	306	*/
	307	if (ip->i_df.if_bytes)
	308	xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
	309	ASSERT(ip->i_df.if_bytes == 0);
	310
	311	xfs_iunlock(ip, XFS_ILOCK_EXCL);
	312	return 0;
	313
	314	error_trans_cancel:
	315	xfs_trans_cancel(tp);
	316	error_unlock:
	317	xfs_iunlock(ip, XFS_ILOCK_EXCL);
	318	return error;
	319	}
	320
	321	/*
	322	* xfs_inactive_symlink - free a symlink
	323	*/
	324	int
	325	xfs_inactive_symlink(
	326	struct xfs_inode *ip)
	327	{
	328	struct xfs_mount *mp = ip->i_mount;
	329	int pathlen;
	330
	331	trace_xfs_inactive_symlink(ip);
	332
	333	if (xfs_is_shutdown(mp))
	334	return -EIO;
	335
	336	xfs_ilock(ip, XFS_ILOCK_EXCL);
	337	pathlen = (int)ip->i_disk_size;
	338	ASSERT(pathlen);
	339
	340	if (pathlen <= 0 \|\| pathlen > XFS_SYMLINK_MAXLEN) {
	341	xfs_alert(mp, "%s: inode (0x%llx) bad symlink length (%d)",
	342	__func__, (unsigned long long)ip->i_ino, pathlen);
	343	xfs_iunlock(ip, XFS_ILOCK_EXCL);
	344	ASSERT(0);
	345	xfs_inode_mark_sick(ip, XFS_SICK_INO_SYMLINK);
	346	return -EFSCORRUPTED;
	347	}
	348
	349	/*
	350	* Inline fork state gets removed by xfs_difree() so we have nothing to
	351	* do here in that case.
	352	*/
	353	if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
	354	xfs_iunlock(ip, XFS_ILOCK_EXCL);
	355	return 0;
	356	}
	357
	358	xfs_iunlock(ip, XFS_ILOCK_EXCL);
	359
	360	/* remove the remote symlink */
	361	return xfs_inactive_symlink_rmt(ip);
	362	}