1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (c) 2000-2006 Silicon Graphics, Inc.
4  * Copyright (c) 2012-2013 Red Hat, Inc.
33 	struct xfs_inode	*ip,  in xfs_readlink()  argument
36 	struct xfs_mount	*mp = ip->i_mount;  in xfs_readlink()
40 	trace_xfs_readlink(ip);  in xfs_readlink()
43 		return -EIO;  in xfs_readlink()
44 	if (xfs_ifork_zapped(ip, XFS_DATA_FORK))  in xfs_readlink()
45 		return -EIO;  in xfs_readlink()
47 	xfs_ilock(ip, XFS_ILOCK_SHARED);  in xfs_readlink()
49 	pathlen = ip->i_disk_size;  in xfs_readlink()
55 			 __func__, (unsigned long long) ip->i_ino,  in xfs_readlink()
61 	if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) {  in xfs_readlink()
63 		 * The VFS crashes on a NULL pointer, so return -EFSCORRUPTED  in xfs_readlink()
66 		if (XFS_IS_CORRUPT(ip->i_mount, !ip->i_df.if_data))  in xfs_readlink()
69 		memcpy(link, ip->i_df.if_data, pathlen + 1);  in xfs_readlink()
72 		error = xfs_symlink_remote_read(ip, link);  in xfs_readlink()
75 	xfs_iunlock(ip, XFS_ILOCK_SHARED);  in xfs_readlink()
78 	xfs_iunlock(ip, XFS_ILOCK_SHARED);  in xfs_readlink()
79 	xfs_inode_mark_sick(ip, XFS_SICK_INO_SYMLINK);  in xfs_readlink()
80 	return -EFSCORRUPTED;  in xfs_readlink()
92 	struct xfs_mount	*mp = dp->i_mount;  in xfs_symlink()
118 		return -EIO;  in xfs_symlink()
125 		return -ENAMETOOLONG;  in xfs_symlink()
137 	 * blocks.  Otherwise, we need to reserve the blocks.  in xfs_symlink()
143 	resblks = xfs_symlink_space_res(mp, link_name->len, fs_blocks);  in xfs_symlink()
149 	error = xfs_trans_alloc_icreate(mp, &M_RES(mp)->tr_symlink, udqp, gdqp,  in xfs_symlink()
160 	if (dp->i_diflags & XFS_DIFLAG_NOSYMLINKS) {  in xfs_symlink()
161 		error = -EPERM;  in xfs_symlink()
170 		error = xfs_icreate(tp, ino, &args, &du.ip);  in xfs_symlink()
186 	xfs_qm_vop_create_dqattach(tp, du.ip, udqp, gdqp, pdqp);  in xfs_symlink()
188 	resblks -= XFS_IALLOC_SPACE_RES(mp);  in xfs_symlink()
189 	error = xfs_symlink_write_target(tp, du.ip, du.ip->i_ino, target_path,  in xfs_symlink()
193 	resblks -= fs_blocks;  in xfs_symlink()
194 	i_size_write(VFS_I(du.ip), du.ip->i_disk_size);  in xfs_symlink()
219 	*ipp = du.ip;  in xfs_symlink()
220 	xfs_iunlock(du.ip, XFS_ILOCK_EXCL);  in xfs_symlink()
233 	if (du.ip) {  in xfs_symlink()
234 		xfs_iunlock(du.ip, XFS_ILOCK_EXCL);  in xfs_symlink()
235 		xfs_finish_inode_setup(du.ip);  in xfs_symlink()
236 		xfs_irele(du.ip);  in xfs_symlink()
251  * Free a symlink that has blocks associated with it.
257  * but allows us to catch corrupt zero-length symlinks in the verifiers.
261 	struct xfs_inode	*ip)  in xfs_inactive_symlink_rmt()  argument
263 	struct xfs_mount	*mp = ip->i_mount;  in xfs_inactive_symlink_rmt()
267 	ASSERT(!xfs_need_iread_extents(&ip->i_df));  in xfs_inactive_symlink_rmt()
270 	 * blocks allocated to it.  Free the  in xfs_inactive_symlink_rmt()
271 	 * blocks here.  We know that we've got  in xfs_inactive_symlink_rmt()
275 	ASSERT(ip->i_df.if_nextents > 0 && ip->i_df.if_nextents <= 2);  in xfs_inactive_symlink_rmt()
277 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp);  in xfs_inactive_symlink_rmt()
281 	xfs_ilock(ip, XFS_ILOCK_EXCL);  in xfs_inactive_symlink_rmt()
282 	xfs_trans_ijoin(tp, ip, 0);  in xfs_inactive_symlink_rmt()
290 	ip->i_disk_size = 0;  in xfs_inactive_symlink_rmt()
291 	VFS_I(ip)->i_mode = (VFS_I(ip)->i_mode & ~S_IFMT) | S_IFREG;  in xfs_inactive_symlink_rmt()
292 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);  in xfs_inactive_symlink_rmt()
294 	error = xfs_symlink_remote_truncate(tp, ip);  in xfs_inactive_symlink_rmt()
307 	if (ip->i_df.if_bytes)  in xfs_inactive_symlink_rmt()
308 		xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);  in xfs_inactive_symlink_rmt()
309 	ASSERT(ip->i_df.if_bytes == 0);  in xfs_inactive_symlink_rmt()
311 	xfs_iunlock(ip, XFS_ILOCK_EXCL);  in xfs_inactive_symlink_rmt()
317 	xfs_iunlock(ip, XFS_ILOCK_EXCL);  in xfs_inactive_symlink_rmt()
322  * xfs_inactive_symlink - free a symlink
326 	struct xfs_inode	*ip)  in xfs_inactive_symlink()  argument
328 	struct xfs_mount	*mp = ip->i_mount;  in xfs_inactive_symlink()
331 	trace_xfs_inactive_symlink(ip);  in xfs_inactive_symlink()
334 		return -EIO;  in xfs_inactive_symlink()
336 	xfs_ilock(ip, XFS_ILOCK_EXCL);  in xfs_inactive_symlink()
337 	pathlen = (int)ip->i_disk_size;  in xfs_inactive_symlink()
342 			 __func__, (unsigned long long)ip->i_ino, pathlen);  in xfs_inactive_symlink()
343 		xfs_iunlock(ip, XFS_ILOCK_EXCL);  in xfs_inactive_symlink()
345 		xfs_inode_mark_sick(ip, XFS_SICK_INO_SYMLINK);  in xfs_inactive_symlink()
346 		return -EFSCORRUPTED;  in xfs_inactive_symlink()
353 	if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) {  in xfs_inactive_symlink()
354 		xfs_iunlock(ip, XFS_ILOCK_EXCL);  in xfs_inactive_symlink()
358 	xfs_iunlock(ip, XFS_ILOCK_EXCL);  in xfs_inactive_symlink()
361 	return xfs_inactive_symlink_rmt(ip);  in xfs_inactive_symlink()