1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (c) 2000-2006 Silicon Graphics, Inc.
34 		(ip->i_diflags & XFS_DIFLAG_PREALLOC);  in xfs_flags2diflags()
50 	if (S_ISDIR(VFS_I(ip)->i_mode)) {  in xfs_flags2diflags()
59 	} else if (S_ISREG(VFS_I(ip)->i_mode)) {  in xfs_flags2diflags()
75 		(ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |  in xfs_flags2diflags2()
93 	if (ip->i_diflags & XFS_DIFLAG_ANY) {  in xfs_ip2xflags()
94 		if (ip->i_diflags & XFS_DIFLAG_REALTIME)  in xfs_ip2xflags()
96 		if (ip->i_diflags & XFS_DIFLAG_PREALLOC)  in xfs_ip2xflags()
98 		if (ip->i_diflags & XFS_DIFLAG_IMMUTABLE)  in xfs_ip2xflags()
100 		if (ip->i_diflags & XFS_DIFLAG_APPEND)  in xfs_ip2xflags()
102 		if (ip->i_diflags & XFS_DIFLAG_SYNC)  in xfs_ip2xflags()
104 		if (ip->i_diflags & XFS_DIFLAG_NOATIME)  in xfs_ip2xflags()
106 		if (ip->i_diflags & XFS_DIFLAG_NODUMP)  in xfs_ip2xflags()
108 		if (ip->i_diflags & XFS_DIFLAG_RTINHERIT)  in xfs_ip2xflags()
110 		if (ip->i_diflags & XFS_DIFLAG_PROJINHERIT)  in xfs_ip2xflags()
112 		if (ip->i_diflags & XFS_DIFLAG_NOSYMLINKS)  in xfs_ip2xflags()
114 		if (ip->i_diflags & XFS_DIFLAG_EXTSIZE)  in xfs_ip2xflags()
116 		if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT)  in xfs_ip2xflags()
118 		if (ip->i_diflags & XFS_DIFLAG_NODEFRAG)  in xfs_ip2xflags()
120 		if (ip->i_diflags & XFS_DIFLAG_FILESTREAM)  in xfs_ip2xflags()
124 	if (ip->i_diflags2 & XFS_DIFLAG2_ANY) {  in xfs_ip2xflags()
125 		if (ip->i_diflags2 & XFS_DIFLAG2_DAX)  in xfs_ip2xflags()
127 		if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)  in xfs_ip2xflags()
139 	if (dp->i_diflags & XFS_DIFLAG_PROJINHERIT)  in xfs_get_initial_prid()
140 		return dp->i_projid;  in xfs_get_initial_prid()
154 	umode_t			mode = VFS_I(ip)->i_mode;  in xfs_inode_inherit_flags()
157 		if (pip->i_diflags & XFS_DIFLAG_RTINHERIT)  in xfs_inode_inherit_flags()
159 		if (pip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {  in xfs_inode_inherit_flags()
161 			ip->i_extsize = pip->i_extsize;  in xfs_inode_inherit_flags()
163 		if (pip->i_diflags & XFS_DIFLAG_PROJINHERIT)  in xfs_inode_inherit_flags()
166 		if ((pip->i_diflags & XFS_DIFLAG_RTINHERIT) &&  in xfs_inode_inherit_flags()
167 		    xfs_has_realtime(ip->i_mount))  in xfs_inode_inherit_flags()
169 		if (pip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {  in xfs_inode_inherit_flags()
171 			ip->i_extsize = pip->i_extsize;  in xfs_inode_inherit_flags()
174 	if ((pip->i_diflags & XFS_DIFLAG_NOATIME) &&  in xfs_inode_inherit_flags()
177 	if ((pip->i_diflags & XFS_DIFLAG_NODUMP) &&  in xfs_inode_inherit_flags()
180 	if ((pip->i_diflags & XFS_DIFLAG_SYNC) &&  in xfs_inode_inherit_flags()
183 	if ((pip->i_diflags & XFS_DIFLAG_NOSYMLINKS) &&  in xfs_inode_inherit_flags()
186 	if ((pip->i_diflags & XFS_DIFLAG_NODEFRAG) &&  in xfs_inode_inherit_flags()
189 	if (pip->i_diflags & XFS_DIFLAG_FILESTREAM)  in xfs_inode_inherit_flags()
192 	ip->i_diflags |= di_flags;  in xfs_inode_inherit_flags()
204 	failaddr = xfs_inode_validate_extsize(ip->i_mount, ip->i_extsize,  in xfs_inode_inherit_flags()
205 			VFS_I(ip)->i_mode, ip->i_diflags);  in xfs_inode_inherit_flags()
207 		ip->i_diflags &= ~(XFS_DIFLAG_EXTSIZE |  in xfs_inode_inherit_flags()
209 		ip->i_extsize = 0;  in xfs_inode_inherit_flags()
221 	if (pip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) {  in xfs_inode_inherit_flags2()
222 		ip->i_diflags2 |= XFS_DIFLAG2_COWEXTSIZE;  in xfs_inode_inherit_flags2()
223 		ip->i_cowextsize = pip->i_cowextsize;  in xfs_inode_inherit_flags2()
225 	if (pip->i_diflags2 & XFS_DIFLAG2_DAX)  in xfs_inode_inherit_flags2()
226 		ip->i_diflags2 |= XFS_DIFLAG2_DAX;  in xfs_inode_inherit_flags2()
229 	failaddr = xfs_inode_validate_cowextsize(ip->i_mount, ip->i_cowextsize,  in xfs_inode_inherit_flags2()
230 			VFS_I(ip)->i_mode, ip->i_diflags, ip->i_diflags2);  in xfs_inode_inherit_flags2()
232 		ip->i_diflags2 &= ~XFS_DIFLAG2_COWEXTSIZE;  in xfs_inode_inherit_flags2()
233 		ip->i_cowextsize = 0;  in xfs_inode_inherit_flags2()
253 	if (args->flags & XFS_ICREATE_INIT_XATTRS)  in xfs_icreate_want_attrfork()
256 	if (!(args->flags & XFS_ICREATE_UNLINKABLE) && xfs_has_parent(mp))  in xfs_icreate_want_attrfork()
265 	struct xfs_trans	*tp,  in xfs_inode_init()  argument
269 	struct xfs_inode	*pip = args->pip;  in xfs_inode_init()
271 	struct xfs_mount	*mp = tp->t_mountp;  in xfs_inode_init()
277 	if (args->flags & XFS_ICREATE_TMPFILE)  in xfs_inode_init()
279 	else if (S_ISDIR(args->mode))  in xfs_inode_init()
283 	inode->i_rdev = args->rdev;  in xfs_inode_init()
285 	if (!args->idmap || pip == NULL) {  in xfs_inode_init()
287 		inode->i_uid = GLOBAL_ROOT_UID;  in xfs_inode_init()
288 		inode->i_gid = GLOBAL_ROOT_GID;  in xfs_inode_init()
289 		ip->i_projid = 0;  in xfs_inode_init()
290 		inode->i_mode = args->mode;  in xfs_inode_init()
293 		if (dir && !(dir->i_mode & S_ISGID) && xfs_has_grpid(mp)) {  in xfs_inode_init()
294 			inode_fsuid_set(inode, args->idmap);  in xfs_inode_init()
295 			inode->i_gid = dir->i_gid;  in xfs_inode_init()
296 			inode->i_mode = args->mode;  in xfs_inode_init()
298 			inode_init_owner(args->idmap, inode, dir, args->mode);  in xfs_inode_init()
307 		if (irix_sgid_inherit && (inode->i_mode & S_ISGID) &&  in xfs_inode_init()
308 		    !vfsgid_in_group_p(i_gid_into_vfsgid(args->idmap, inode)))  in xfs_inode_init()
309 			inode->i_mode &= ~S_ISGID;  in xfs_inode_init()
311 		ip->i_projid = xfs_get_initial_prid(pip);  in xfs_inode_init()
314 	ip->i_disk_size = 0;  in xfs_inode_init()
315 	ip->i_df.if_nextents = 0;  in xfs_inode_init()
316 	ASSERT(ip->i_nblocks == 0);  in xfs_inode_init()
318 	ip->i_extsize = 0;  in xfs_inode_init()
319 	ip->i_diflags = 0;  in xfs_inode_init()
323 		ip->i_cowextsize = 0;  in xfs_inode_init()
327 	xfs_trans_ichgtime(tp, ip, times);  in xfs_inode_init()
330 	switch (args->mode & S_IFMT) {  in xfs_inode_init()
335 		ip->i_df.if_format = XFS_DINODE_FMT_DEV;  in xfs_inode_init()
340 		if (pip && (pip->i_diflags & XFS_DIFLAG_ANY))  in xfs_inode_init()
342 		if (pip && (pip->i_diflags2 & XFS_DIFLAG2_ANY))  in xfs_inode_init()
346 		ip->i_df.if_format = XFS_DINODE_FMT_EXTENTS;  in xfs_inode_init()
347 		ip->i_df.if_bytes = 0;  in xfs_inode_init()
348 		ip->i_df.if_data = NULL;  in xfs_inode_init()
355 		ip->i_forkoff = xfs_default_attroffset(ip) >> 3;  in xfs_inode_init()
359 			spin_lock(&mp->m_sb_lock);  in xfs_inode_init()
361 			spin_unlock(&mp->m_sb_lock);  in xfs_inode_init()
362 			xfs_log_sb(tp);  in xfs_inode_init()
366 	xfs_trans_log_inode(tp, ip, flags);  in xfs_inode_init()
370  * In-Core Unlinked List Lookups
375  * file descriptor but not linked from anywhere in the on-disk directory tree
377  * maintains links to these inodes so that on-disk metadata are consistent.
379  * XFS implements a per-AG on-disk hash table of unlinked inodes.  The AGI
382  * singly-linked list causes scaling problems in the iunlink remove function
386  * Hence we keep an in-memory double linked list to link each inode on an
403  * Update the prev pointer of the next agino.  Returns -ENOLINK if the inode
420 		return -ENOLINK;  in xfs_iunlink_update_backref()
422 	ip->i_prev_unlinked = prev_agino;  in xfs_iunlink_update_backref()
432 	struct xfs_trans	*tp,  in xfs_iunlink_update_bucket()  argument
438 	struct xfs_agi		*agi = agibp->b_addr;  in xfs_iunlink_update_bucket()
444 	old_value = be32_to_cpu(agi->agi_unlinked[bucket_index]);  in xfs_iunlink_update_bucket()
445 	trace_xfs_iunlink_update_bucket(tp->t_mountp, pag->pag_agno, bucket_index,  in xfs_iunlink_update_bucket()
456 		return -EFSCORRUPTED;  in xfs_iunlink_update_bucket()
459 	agi->agi_unlinked[bucket_index] = cpu_to_be32(new_agino);  in xfs_iunlink_update_bucket()
462 	xfs_trans_log_buf(tp, agibp, offset, offset + sizeof(xfs_agino_t) - 1);  in xfs_iunlink_update_bucket()
468 	struct xfs_trans	*tp,  in xfs_iunlink_insert_inode()  argument
473 	struct xfs_mount	*mp = tp->t_mountp;  in xfs_iunlink_insert_inode()
474 	struct xfs_agi		*agi = agibp->b_addr;  in xfs_iunlink_insert_inode()
476 	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, ip->i_ino);  in xfs_iunlink_insert_inode()
485 	next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]);  in xfs_iunlink_insert_inode()
490 		return -EFSCORRUPTED;  in xfs_iunlink_insert_inode()
498 	if (error == -ENOLINK)  in xfs_iunlink_insert_inode()
499 		error = xfs_iunlink_reload_next(tp, agibp, agino, next_agino);  in xfs_iunlink_insert_inode()
508 		error = xfs_iunlink_log_inode(tp, ip, pag, next_agino);  in xfs_iunlink_insert_inode()
511 		ip->i_next_unlinked = next_agino;  in xfs_iunlink_insert_inode()
515 	ip->i_prev_unlinked = NULLAGINO;  in xfs_iunlink_insert_inode()
516 	return xfs_iunlink_update_bucket(tp, pag, agibp, bucket_index, agino);  in xfs_iunlink_insert_inode()
520  * This is called when the inode's link count has gone to 0 or we are creating
523  * We place the on-disk inode on a list in the AGI.  It will be pulled from this
528 	struct xfs_trans	*tp,  in xfs_iunlink()  argument
531 	struct xfs_mount	*mp = tp->t_mountp;  in xfs_iunlink()
536 	ASSERT(VFS_I(ip)->i_nlink == 0);  in xfs_iunlink()
537 	ASSERT(VFS_I(ip)->i_mode != 0);  in xfs_iunlink()
540 	pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));  in xfs_iunlink()
543 	error = xfs_read_agi(pag, tp, 0, &agibp);  in xfs_iunlink()
547 	error = xfs_iunlink_insert_inode(tp, pag, agibp, ip);  in xfs_iunlink()
555 	struct xfs_trans	*tp,  in xfs_iunlink_remove_inode()  argument
560 	struct xfs_mount	*mp = tp->t_mountp;  in xfs_iunlink_remove_inode()
561 	struct xfs_agi		*agi = agibp->b_addr;  in xfs_iunlink_remove_inode()
562 	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, ip->i_ino);  in xfs_iunlink_remove_inode()
573 	head_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]);  in xfs_iunlink_remove_inode()
578 		return -EFSCORRUPTED;  in xfs_iunlink_remove_inode()
586 	error = xfs_iunlink_log_inode(tp, ip, pag, NULLAGINO);  in xfs_iunlink_remove_inode()
594 	error = xfs_iunlink_update_backref(pag, ip->i_prev_unlinked,  in xfs_iunlink_remove_inode()
595 			ip->i_next_unlinked);  in xfs_iunlink_remove_inode()
596 	if (error == -ENOLINK)  in xfs_iunlink_remove_inode()
597 		error = xfs_iunlink_reload_next(tp, agibp, ip->i_prev_unlinked,  in xfs_iunlink_remove_inode()
598 				ip->i_next_unlinked);  in xfs_iunlink_remove_inode()
605 		prev_ip = xfs_iunlink_lookup(pag, ip->i_prev_unlinked);  in xfs_iunlink_remove_inode()
608 			return -EFSCORRUPTED;  in xfs_iunlink_remove_inode()
611 		error = xfs_iunlink_log_inode(tp, prev_ip, pag,  in xfs_iunlink_remove_inode()
612 				ip->i_next_unlinked);  in xfs_iunlink_remove_inode()
613 		prev_ip->i_next_unlinked = ip->i_next_unlinked;  in xfs_iunlink_remove_inode()
616 		error = xfs_iunlink_update_bucket(tp, pag, agibp, bucket_index,  in xfs_iunlink_remove_inode()
617 				ip->i_next_unlinked);  in xfs_iunlink_remove_inode()
620 	ip->i_next_unlinked = NULLAGINO;  in xfs_iunlink_remove_inode()
621 	ip->i_prev_unlinked = 0;  in xfs_iunlink_remove_inode()
626  * Pull the on-disk inode from the AGI unlinked list.
630 	struct xfs_trans	*tp,  in xfs_iunlink_remove()  argument
640 	error = xfs_read_agi(pag, tp, 0, &agibp);  in xfs_iunlink_remove()
644 	return xfs_iunlink_remove_inode(tp, pag, agibp, ip);  in xfs_iunlink_remove()
648  * Decrement the link count on an inode & log the change.  If this causes the
649  * link count to go to zero, move the inode to AGI unlinked list so that it can
654 	struct xfs_trans	*tp,  in xfs_droplink()  argument
659 	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);  in xfs_droplink()
661 	if (inode->i_nlink == 0) {  in xfs_droplink()
662 		xfs_info_ratelimited(tp->t_mountp,  in xfs_droplink()
663  "Inode 0x%llx link count dropped below zero.  Pinning link count.",  in xfs_droplink()
664 				ip->i_ino);  in xfs_droplink()
667 	if (inode->i_nlink != XFS_NLINK_PINNED)  in xfs_droplink()
670 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);  in xfs_droplink()
672 	if (inode->i_nlink)  in xfs_droplink()
675 	return xfs_iunlink(tp, ip);  in xfs_droplink()
679  * Increment the link count on an inode & log the change.
683 	struct xfs_trans	*tp,  in xfs_bumplink()  argument
688 	xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);  in xfs_bumplink()
690 	if (inode->i_nlink == XFS_NLINK_PINNED - 1)  in xfs_bumplink()
691 		xfs_info_ratelimited(tp->t_mountp,  in xfs_bumplink()
692  "Inode 0x%llx link count exceeded maximum.  Pinning link count.",  in xfs_bumplink()
693 				ip->i_ino);  in xfs_bumplink()
694 	if (inode->i_nlink != XFS_NLINK_PINNED)  in xfs_bumplink()
697 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);  in xfs_bumplink()
703 	struct xfs_trans	*tp,  in xfs_inode_uninit()  argument
708 	struct xfs_mount	*mp = ip->i_mount;  in xfs_inode_uninit()
714 	 * makes the AGI lock -> unlinked list modification order the same as  in xfs_inode_uninit()
717 	error = xfs_difree(tp, pag, ip->i_ino, xic);  in xfs_inode_uninit()
721 	error = xfs_iunlink_remove(tp, pag, ip);  in xfs_inode_uninit()
726 	 * Free any local-format data sitting around before we reset the  in xfs_inode_uninit()
730 	if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) {  in xfs_inode_uninit()
731 		kfree(ip->i_df.if_data);  in xfs_inode_uninit()
732 		ip->i_df.if_data = NULL;  in xfs_inode_uninit()
733 		ip->i_df.if_bytes = 0;  in xfs_inode_uninit()
736 	VFS_I(ip)->i_mode = 0;		/* mark incore inode as free */  in xfs_inode_uninit()
737 	ip->i_diflags = 0;  in xfs_inode_uninit()
738 	ip->i_diflags2 = mp->m_ino_geo.new_diflags2;  in xfs_inode_uninit()
739 	ip->i_forkoff = 0;		/* mark the attr fork not in use */  in xfs_inode_uninit()
740 	ip->i_df.if_format = XFS_DINODE_FMT_EXTENTS;  in xfs_inode_uninit()
746 	VFS_I(ip)->i_generation++;  in xfs_inode_uninit()
747 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);  in xfs_inode_uninit()