1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright (c) 2018-2024 Oracle.  All Rights Reserved.
59 	struct xfs_mount	*mp = sc->mp;  in xrep_setup_symlink()
60 	unsigned long long	blocks;  in xrep_setup_symlink()  local
68 	 * If we're doing a repair, we reserve enough blocks to write out a  in xrep_setup_symlink()
69 	 * completely new symlink file, plus twice as many blocks as we would  in xrep_setup_symlink()
80 	blocks = xfs_symlink_blocks(sc->mp, XFS_SYMLINK_MAXLEN);  in xrep_setup_symlink()
81 	blocks += xfs_bmbt_calc_size(mp, blocks) * 2;  in xrep_setup_symlink()
82 	if (blocks > UINT_MAX)  in xrep_setup_symlink()
83 		return -EOPNOTSUPP;  in xrep_setup_symlink()
85 	*resblks += blocks;  in xrep_setup_symlink()
90  * Try to salvage the pathname from remote blocks.  Returns the number of bytes
98 	struct xfs_inode	*ip = sc->ip;  in xrep_symlink_salvage_remote()  local
100 	char			*target_buf = sc->buf;  in xrep_symlink_salvage_remote()
114 	len = min_t(loff_t, ip->i_disk_size, XFS_SYMLINK_MAXLEN);  in xrep_symlink_salvage_remote()
115 	fsblocks = xfs_symlink_blocks(sc->mp, len);  in xrep_symlink_salvage_remote()
116 	error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0);  in xrep_symlink_salvage_remote()
123 		d = XFS_FSB_TO_DADDR(sc->mp, mval[n].br_startblock);  in xrep_symlink_salvage_remote()
126 		error = xfs_trans_read_buf(sc->mp, sc->tp, sc->mp->m_ddev_targp,  in xrep_symlink_salvage_remote()
127 				d, XFS_FSB_TO_BB(sc->mp, mval[n].br_blockcount),  in xrep_symlink_salvage_remote()
131 		bp->b_ops = &xfs_symlink_buf_ops;  in xrep_symlink_salvage_remote()
134 		byte_cnt = XFS_FSB_TO_B(sc->mp, mval[n].br_blockcount);  in xrep_symlink_salvage_remote()
135 		byte_cnt = XFS_SYMLINK_BUF_SPACE(sc->mp, byte_cnt);  in xrep_symlink_salvage_remote()
144 		fa = bp->b_ops->verify_struct(bp);  in xrep_symlink_salvage_remote()
145 		dsl = bp->b_addr;  in xrep_symlink_salvage_remote()
146 		magic_ok = dsl->sl_magic == cpu_to_be32(XFS_SYMLINK_MAGIC);  in xrep_symlink_salvage_remote()
147 		hdr_ok = xfs_symlink_hdr_ok(ip->i_ino, offset, byte_cnt, bp);  in xrep_symlink_salvage_remote()
153 		len -= byte_cnt;  in xrep_symlink_salvage_remote()
167 	struct xfs_inode	*ip = sc->ip;  in xrep_symlink_salvage_inline()  local
168 	char			*target_buf = sc->buf;  in xrep_symlink_salvage_inline()
173 	ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);  in xrep_symlink_salvage_inline()
174 	if (!ifp->if_data)  in xrep_symlink_salvage_inline()
182 	old_target = ifp->if_data;  in xrep_symlink_salvage_inline()
183 	if (xfs_inode_has_sickness(sc->ip, XFS_SICK_INO_SYMLINK_ZAPPED) &&  in xrep_symlink_salvage_inline()
184 	    sc->ip->i_disk_size == 1 && old_target[0] == '?')  in xrep_symlink_salvage_inline()
187 	nr = min(XFS_SYMLINK_MAXLEN, xfs_inode_data_fork_size(ip));  in xrep_symlink_salvage_inline()
188 	strncpy(target_buf, ifp->if_data, nr);  in xrep_symlink_salvage_inline()
205 	char			*target_buf = sc->buf;  in xrep_symlink_salvage()
208 	BUILD_BUG_ON(sizeof(DUMMY_TARGET) - 1 <= NAME_MAX);  in xrep_symlink_salvage()
214 	if (!(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) {  in xrep_symlink_salvage()
215 		if (sc->ip->i_df.if_format == XFS_DINODE_FMT_LOCAL)  in xrep_symlink_salvage()
223 		 * NULL-terminate the buffer because the ondisk target does not  in xrep_symlink_salvage()
228 		if (strlen(target_buf) != sc->ip->i_disk_size)  in xrep_symlink_salvage()
241 	trace_xrep_symlink_salvage_target(sc->ip, target_buf,  in xrep_symlink_salvage()
250 	struct xfs_inode	*ip,  in xrep_symlink_local_to_remote()  argument
255 	struct xfs_dsymlink_hdr	*dsl = bp->b_addr;  in xrep_symlink_local_to_remote()
257 	xfs_symlink_local_to_remote(tp, bp, ip, ifp, NULL);  in xrep_symlink_local_to_remote()
259 	if (!xfs_has_crc(sc->mp))  in xrep_symlink_local_to_remote()
262 	dsl->sl_owner = cpu_to_be64(sc->ip->i_ino);  in xrep_symlink_local_to_remote()
264 			  sizeof(struct xfs_dsymlink_hdr) + ifp->if_bytes - 1);  in xrep_symlink_local_to_remote()
287 		error = xfs_bmap_local_to_extents(sc->tp, sc->tempip, 1,  in xrep_symlink_swap_prep()
294 		xfs_trans_log_inode(sc->tp, sc->ip, 0);  in xrep_symlink_swap_prep()
296 		error = xfs_defer_finish(&sc->tp);  in xrep_symlink_swap_prep()
309 		ifp = xfs_ifork_ptr(sc->ip, XFS_DATA_FORK);  in xrep_symlink_swap_prep()
311 		ifp->if_format = XFS_DINODE_FMT_EXTENTS;  in xrep_symlink_swap_prep()
312 		ifp->if_nextents = 0;  in xrep_symlink_swap_prep()
313 		ifp->if_bytes = 0;  in xrep_symlink_swap_prep()
314 		ifp->if_data = NULL;  in xrep_symlink_swap_prep()
315 		ifp->if_height = 0;  in xrep_symlink_swap_prep()
317 		xfs_trans_log_inode(sc->tp, sc->ip,  in xrep_symlink_swap_prep()
329 	struct xrep_tempexch	*tx = sc->buf;  in xrep_symlink_swap()
333 	ip_local = sc->ip->i_df.if_format == XFS_DINODE_FMT_LOCAL;  in xrep_symlink_swap()
334 	temp_local = sc->tempip->i_df.if_format == XFS_DINODE_FMT_LOCAL;  in xrep_symlink_swap()
342 	    sc->tempip->i_disk_size <= xfs_inode_data_fork_size(sc->ip)) {  in xrep_symlink_swap()
347 	/* Otherwise, make sure both data forks are in block-mapping mode. */  in xrep_symlink_swap()
356  * Free all the remote blocks and reset the data fork.  The caller must join
364 	struct xfs_ifork	*ifp = xfs_ifork_ptr(sc->tempip, XFS_DATA_FORK);  in xrep_symlink_reset_fork()
369 		error = xrep_reap_ifork(sc, sc->tempip, XFS_DATA_FORK);  in xrep_symlink_reset_fork()
374 	trace_xrep_symlink_reset_fork(sc->tempip);  in xrep_symlink_reset_fork()
378 	return xfs_symlink_write_target(sc->tp, sc->tempip, sc->tempip->i_ino,  in xrep_symlink_reset_fork()
391 	char			*target_buf = sc->buf;  in xrep_symlink_rebuild()
397 	/* How many blocks do we need? */  in xrep_symlink_rebuild()
401 		return -EFSCORRUPTED;  in xrep_symlink_rebuild()
403 	trace_xrep_symlink_rebuild(sc->ip);  in xrep_symlink_rebuild()
417 	xfs_trans_ijoin(sc->tp, sc->tempip, 0);  in xrep_symlink_rebuild()
424 	fs_blocks = xfs_symlink_blocks(sc->mp, target_len);  in xrep_symlink_rebuild()
425 	resblks = xfs_symlink_space_res(sc->mp, target_len, fs_blocks);  in xrep_symlink_rebuild()
426 	error = xfs_trans_reserve_quota_nblks(sc->tp, sc->tempip, resblks, 0,  in xrep_symlink_rebuild()
432 	xfs_idestroy_fork(&sc->tempip->i_df);  in xrep_symlink_rebuild()
433 	sc->tempip->i_df.if_bytes = 0;  in xrep_symlink_rebuild()
434 	sc->tempip->i_df.if_format = XFS_DINODE_FMT_EXTENTS;  in xrep_symlink_rebuild()
437 	error = xfs_symlink_write_target(sc->tp, sc->tempip, sc->ip->i_ino,  in xrep_symlink_rebuild()
445 	 * re-lock the inodes.  in xrep_symlink_rebuild()
462 	tx = sc->buf;  in xrep_symlink_rebuild()
477 	 * Release the old symlink blocks and reset the data fork of the temp  in xrep_symlink_rebuild()
492 	if (!xfs_has_rmapbt(sc->mp))  in xrep_symlink()
493 		return -EOPNOTSUPP;  in xrep_symlink()
495 	if (!xfs_has_exchange_range(sc->mp))  in xrep_symlink()
496 		return -EOPNOTSUPP;  in xrep_symlink()
498 	ASSERT(sc->ilock_flags & XFS_ILOCK_EXCL);  in xrep_symlink()