1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright (c) 2018-2024 Oracle.  All Rights Reserved.
58 	struct xfs_mount	*mp = sc->mp;  in xrep_setup_symlink()
59 	unsigned long long	blocks;  in xrep_setup_symlink()  local
67 	 * If we're doing a repair, we reserve enough blocks to write out a  in xrep_setup_symlink()
68 	 * completely new symlink file, plus twice as many blocks as we would  in xrep_setup_symlink()
79 	blocks = xfs_symlink_blocks(sc->mp, XFS_SYMLINK_MAXLEN);  in xrep_setup_symlink()
80 	blocks += xfs_bmbt_calc_size(mp, blocks) * 2;  in xrep_setup_symlink()
81 	if (blocks > UINT_MAX)  in xrep_setup_symlink()
82 		return -EOPNOTSUPP;  in xrep_setup_symlink()
84 	*resblks += blocks;  in xrep_setup_symlink()
89  * Try to salvage the pathname from remote blocks.  Returns the number of bytes
97 	struct xfs_inode	*ip = sc->ip;  in xrep_symlink_salvage_remote()  local
99 	char			*target_buf = sc->buf;  in xrep_symlink_salvage_remote()
113 	len = min_t(loff_t, ip->i_disk_size, XFS_SYMLINK_MAXLEN);  in xrep_symlink_salvage_remote()
114 	fsblocks = xfs_symlink_blocks(sc->mp, len);  in xrep_symlink_salvage_remote()
115 	error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0);  in xrep_symlink_salvage_remote()
122 		d = XFS_FSB_TO_DADDR(sc->mp, mval[n].br_startblock);  in xrep_symlink_salvage_remote()
125 		error = xfs_trans_read_buf(sc->mp, sc->tp, sc->mp->m_ddev_targp,  in xrep_symlink_salvage_remote()
126 				d, XFS_FSB_TO_BB(sc->mp, mval[n].br_blockcount),  in xrep_symlink_salvage_remote()
130 		bp->b_ops = &xfs_symlink_buf_ops;  in xrep_symlink_salvage_remote()
133 		byte_cnt = XFS_FSB_TO_B(sc->mp, mval[n].br_blockcount);  in xrep_symlink_salvage_remote()
134 		byte_cnt = XFS_SYMLINK_BUF_SPACE(sc->mp, byte_cnt);  in xrep_symlink_salvage_remote()
143 		fa = bp->b_ops->verify_struct(bp);  in xrep_symlink_salvage_remote()
144 		dsl = bp->b_addr;  in xrep_symlink_salvage_remote()
145 		magic_ok = dsl->sl_magic == cpu_to_be32(XFS_SYMLINK_MAGIC);  in xrep_symlink_salvage_remote()
146 		hdr_ok = xfs_symlink_hdr_ok(ip->i_ino, offset, byte_cnt, bp);  in xrep_symlink_salvage_remote()
152 		len -= byte_cnt;  in xrep_symlink_salvage_remote()
166 	struct xfs_inode	*ip = sc->ip;  in xrep_symlink_salvage_inline()  local
167 	char			*target_buf = sc->buf;  in xrep_symlink_salvage_inline()
172 	ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);  in xrep_symlink_salvage_inline()
173 	if (!ifp->if_data)  in xrep_symlink_salvage_inline()
181 	old_target = ifp->if_data;  in xrep_symlink_salvage_inline()
182 	if (xfs_inode_has_sickness(sc->ip, XFS_SICK_INO_SYMLINK_ZAPPED) &&  in xrep_symlink_salvage_inline()
183 	    sc->ip->i_disk_size == 1 && old_target[0] == '?')  in xrep_symlink_salvage_inline()
186 	nr = min(XFS_SYMLINK_MAXLEN, xfs_inode_data_fork_size(ip));  in xrep_symlink_salvage_inline()
187 	strncpy(target_buf, ifp->if_data, nr);  in xrep_symlink_salvage_inline()
204 	char			*target_buf = sc->buf;  in xrep_symlink_salvage()
207 	BUILD_BUG_ON(sizeof(DUMMY_TARGET) - 1 <= NAME_MAX);  in xrep_symlink_salvage()
213 	if (!(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) {  in xrep_symlink_salvage()
214 		if (sc->ip->i_df.if_format == XFS_DINODE_FMT_LOCAL)  in xrep_symlink_salvage()
222 		 * NULL-terminate the buffer because the ondisk target does not  in xrep_symlink_salvage()
227 		if (strlen(target_buf) != sc->ip->i_disk_size)  in xrep_symlink_salvage()
236 		sc->sick_mask |= XFS_SICK_INO_SYMLINK_ZAPPED;  in xrep_symlink_salvage()
240 	trace_xrep_symlink_salvage_target(sc->ip, target_buf,  in xrep_symlink_salvage()
249 	struct xfs_inode	*ip,  in xrep_symlink_local_to_remote()  argument
254 	struct xfs_dsymlink_hdr	*dsl = bp->b_addr;  in xrep_symlink_local_to_remote()
256 	xfs_symlink_local_to_remote(tp, bp, ip, ifp, NULL);  in xrep_symlink_local_to_remote()
258 	if (!xfs_has_crc(sc->mp))  in xrep_symlink_local_to_remote()
261 	dsl->sl_owner = cpu_to_be64(sc->ip->i_ino);  in xrep_symlink_local_to_remote()
263 			  sizeof(struct xfs_dsymlink_hdr) + ifp->if_bytes - 1);  in xrep_symlink_local_to_remote()
286 		error = xfs_bmap_local_to_extents(sc->tp, sc->tempip, 1,  in xrep_symlink_swap_prep()
293 		xfs_trans_log_inode(sc->tp, sc->ip, 0);  in xrep_symlink_swap_prep()
295 		error = xfs_defer_finish(&sc->tp);  in xrep_symlink_swap_prep()
308 		ifp = xfs_ifork_ptr(sc->ip, XFS_DATA_FORK);  in xrep_symlink_swap_prep()
310 		ifp->if_format = XFS_DINODE_FMT_EXTENTS;  in xrep_symlink_swap_prep()
311 		ifp->if_nextents = 0;  in xrep_symlink_swap_prep()
312 		ifp->if_bytes = 0;  in xrep_symlink_swap_prep()
313 		ifp->if_data = NULL;  in xrep_symlink_swap_prep()
314 		ifp->if_height = 0;  in xrep_symlink_swap_prep()
316 		xfs_trans_log_inode(sc->tp, sc->ip,  in xrep_symlink_swap_prep()
328 	struct xrep_tempexch	*tx = sc->buf;  in xrep_symlink_swap()
332 	ip_local = sc->ip->i_df.if_format == XFS_DINODE_FMT_LOCAL;  in xrep_symlink_swap()
333 	temp_local = sc->tempip->i_df.if_format == XFS_DINODE_FMT_LOCAL;  in xrep_symlink_swap()
341 	    sc->tempip->i_disk_size <= xfs_inode_data_fork_size(sc->ip)) {  in xrep_symlink_swap()
346 	/* Otherwise, make sure both data forks are in block-mapping mode. */  in xrep_symlink_swap()
355  * Free all the remote blocks and reset the data fork.  The caller must join
363 	struct xfs_ifork	*ifp = xfs_ifork_ptr(sc->tempip, XFS_DATA_FORK);  in xrep_symlink_reset_fork()
368 		error = xrep_reap_ifork(sc, sc->tempip, XFS_DATA_FORK);  in xrep_symlink_reset_fork()
373 	trace_xrep_symlink_reset_fork(sc->tempip);  in xrep_symlink_reset_fork()
377 	return xfs_symlink_write_target(sc->tp, sc->tempip, sc->tempip->i_ino,  in xrep_symlink_reset_fork()
390 	char			*target_buf = sc->buf;  in xrep_symlink_rebuild()
396 	/* How many blocks do we need? */  in xrep_symlink_rebuild()
400 		return -EFSCORRUPTED;  in xrep_symlink_rebuild()
402 	trace_xrep_symlink_rebuild(sc->ip);  in xrep_symlink_rebuild()
416 	xfs_trans_ijoin(sc->tp, sc->tempip, 0);  in xrep_symlink_rebuild()
423 	fs_blocks = xfs_symlink_blocks(sc->mp, target_len);  in xrep_symlink_rebuild()
424 	resblks = xfs_symlink_space_res(sc->mp, target_len, fs_blocks);  in xrep_symlink_rebuild()
425 	error = xfs_trans_reserve_quota_nblks(sc->tp, sc->tempip, resblks, 0,  in xrep_symlink_rebuild()
431 	xfs_idestroy_fork(&sc->tempip->i_df);  in xrep_symlink_rebuild()
432 	sc->tempip->i_df.if_bytes = 0;  in xrep_symlink_rebuild()
433 	sc->tempip->i_df.if_format = XFS_DINODE_FMT_EXTENTS;  in xrep_symlink_rebuild()
436 	error = xfs_symlink_write_target(sc->tp, sc->tempip, sc->ip->i_ino,  in xrep_symlink_rebuild()
444 	 * re-lock the inodes.  in xrep_symlink_rebuild()
461 	tx = sc->buf;  in xrep_symlink_rebuild()
476 	 * Release the old symlink blocks and reset the data fork of the temp  in xrep_symlink_rebuild()
491 	if (!xfs_has_rmapbt(sc->mp))  in xrep_symlink()
492 		return -EOPNOTSUPP;  in xrep_symlink()
494 	if (!xfs_has_exchange_range(sc->mp))  in xrep_symlink()
495 		return -EOPNOTSUPP;  in xrep_symlink()
497 	ASSERT(sc->ilock_flags & XFS_ILOCK_EXCL);  in xrep_symlink()