2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "xfs_types.h"
25 #include "xfs_trans.h"
28 #include "xfs_mount.h"
29 #include "xfs_da_btree.h"
30 #include "xfs_bmap_btree.h"
31 #include "xfs_attr_sf.h"
32 #include "xfs_dinode.h"
33 #include "xfs_inode.h"
34 #include "xfs_alloc.h"
35 #include "xfs_inode_item.h"
38 #include "xfs_attr_leaf.h"
39 #include "xfs_error.h"
40 #include "xfs_quota.h"
41 #include "xfs_trans_space.h"
43 #include "xfs_vnodeops.h"
44 #include "xfs_trace.h"
49 * Provide the external interfaces to manage attribute lists.
52 /*========================================================================
53 * Function prototypes for the kernel.
54 *========================================================================*/
57 * Internal routines when attribute list fits inside the inode.
59 STATIC int xfs_attr_shortform_addname(xfs_da_args_t *args);
62 * Internal routines when attribute list is one block.
64 STATIC int xfs_attr_leaf_get(xfs_da_args_t *args);
65 STATIC int xfs_attr_leaf_addname(xfs_da_args_t *args);
66 STATIC int xfs_attr_leaf_removename(xfs_da_args_t *args);
67 STATIC int xfs_attr_leaf_list(xfs_attr_list_context_t *context);
70 * Internal routines when attribute list is more than one block.
72 STATIC int xfs_attr_node_get(xfs_da_args_t *args);
73 STATIC int xfs_attr_node_addname(xfs_da_args_t *args);
74 STATIC int xfs_attr_node_removename(xfs_da_args_t *args);
75 STATIC int xfs_attr_node_list(xfs_attr_list_context_t *context);
76 STATIC int xfs_attr_fillstate(xfs_da_state_t *state);
77 STATIC int xfs_attr_refillstate(xfs_da_state_t *state);
80 * Routines to manipulate out-of-line attribute values.
82 STATIC int xfs_attr_rmtval_set(xfs_da_args_t *args);
83 STATIC int xfs_attr_rmtval_remove(xfs_da_args_t *args);
85 #define ATTR_RMTVALUE_MAPSIZE 1 /* # of map entries at once */
88 xfs_attr_name_to_xname(
89 struct xfs_name *xname,
90 const unsigned char *aname)
95 xname->len = strlen((char *)aname);
96 if (xname->len >= MAXNAMELEN)
97 return EFAULT; /* match IRIX behaviour */
104 struct xfs_inode *ip)
106 if (!XFS_IFORK_Q(ip) ||
107 (ip->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS &&
108 ip->i_d.di_anextents == 0))
113 /*========================================================================
114 * Overall external interface routines.
115 *========================================================================*/
119 struct xfs_inode *ip,
120 struct xfs_name *name,
121 unsigned char *value,
128 if (!xfs_inode_hasattr(ip))
132 * Fill in the arg structure for this request.
134 memset((char *)&args, 0, sizeof(args));
135 args.name = name->name;
136 args.namelen = name->len;
138 args.valuelen = *valuelenp;
140 args.hashval = xfs_da_hashname(args.name, args.namelen);
142 args.whichfork = XFS_ATTR_FORK;
145 * Decide on what work routines to call based on the inode size.
147 if (ip->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
148 error = xfs_attr_shortform_getvalue(&args);
149 } else if (xfs_bmap_one_block(ip, XFS_ATTR_FORK)) {
150 error = xfs_attr_leaf_get(&args);
152 error = xfs_attr_node_get(&args);
156 * Return the number of bytes in the value to the caller.
158 *valuelenp = args.valuelen;
168 const unsigned char *name,
169 unsigned char *value,
174 struct xfs_name xname;
176 XFS_STATS_INC(xs_attr_get);
178 if (XFS_FORCED_SHUTDOWN(ip->i_mount))
181 error = xfs_attr_name_to_xname(&xname, name);
185 xfs_ilock(ip, XFS_ILOCK_SHARED);
186 error = xfs_attr_get_int(ip, &xname, value, valuelenp, flags);
187 xfs_iunlock(ip, XFS_ILOCK_SHARED);
192 * Calculate how many blocks we need for the new attribute,
196 struct xfs_inode *ip,
201 struct xfs_mount *mp = ip->i_mount;
206 * Determine space new attribute will use, and if it would be
207 * "local" or "remote" (note: local != inline).
209 size = xfs_attr_leaf_newentsize(namelen, valuelen,
210 mp->m_sb.sb_blocksize, local);
212 nblks = XFS_DAENTER_SPACE_RES(mp, XFS_ATTR_FORK);
214 if (size > (mp->m_sb.sb_blocksize >> 1)) {
215 /* Double split possible */
220 * Out of line attribute, cannot double split, but
221 * make room for the attribute value itself.
223 uint dblocks = XFS_B_TO_FSB(mp, valuelen);
225 nblks += XFS_NEXTENTADD_SPACE_RES(mp, dblocks, XFS_ATTR_FORK);
233 struct xfs_inode *dp,
234 struct xfs_name *name,
235 unsigned char *value,
240 xfs_fsblock_t firstblock;
241 xfs_bmap_free_t flist;
242 int error, err2, committed;
243 xfs_mount_t *mp = dp->i_mount;
244 int rsvd = (flags & ATTR_ROOT) != 0;
248 * Attach the dquots to the inode.
250 error = xfs_qm_dqattach(dp, 0);
255 * If the inode doesn't have an attribute fork, add one.
256 * (inode must not be locked when we call this routine)
258 if (XFS_IFORK_Q(dp) == 0) {
259 int sf_size = sizeof(xfs_attr_sf_hdr_t) +
260 XFS_ATTR_SF_ENTSIZE_BYNAME(name->len, valuelen);
262 if ((error = xfs_bmap_add_attrfork(dp, sf_size, rsvd)))
267 * Fill in the arg structure for this request.
269 memset((char *)&args, 0, sizeof(args));
270 args.name = name->name;
271 args.namelen = name->len;
273 args.valuelen = valuelen;
275 args.hashval = xfs_da_hashname(args.name, args.namelen);
277 args.firstblock = &firstblock;
279 args.whichfork = XFS_ATTR_FORK;
280 args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
282 /* Size is now blocks for attribute data */
283 args.total = xfs_attr_calc_size(dp, name->len, valuelen, &local);
286 * Start our first transaction of the day.
288 * All future transactions during this code must be "chained" off
289 * this one via the trans_dup() call. All transactions will contain
290 * the inode, and the inode will always be marked with trans_ihold().
291 * Since the inode will be locked in all transactions, we must log
292 * the inode in every transaction to let it float upward through
295 args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_SET);
298 * Root fork attributes can use reserved data blocks for this
299 * operation if necessary
303 args.trans->t_flags |= XFS_TRANS_RESERVE;
305 if ((error = xfs_trans_reserve(args.trans, args.total,
306 XFS_ATTRSET_LOG_RES(mp, args.total), 0,
307 XFS_TRANS_PERM_LOG_RES, XFS_ATTRSET_LOG_COUNT))) {
308 xfs_trans_cancel(args.trans, 0);
311 xfs_ilock(dp, XFS_ILOCK_EXCL);
313 error = xfs_trans_reserve_quota_nblks(args.trans, dp, args.total, 0,
314 rsvd ? XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
315 XFS_QMOPT_RES_REGBLKS);
317 xfs_iunlock(dp, XFS_ILOCK_EXCL);
318 xfs_trans_cancel(args.trans, XFS_TRANS_RELEASE_LOG_RES);
322 xfs_trans_ijoin(args.trans, dp, 0);
325 * If the attribute list is non-existent or a shortform list,
326 * upgrade it to a single-leaf-block attribute list.
328 if ((dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) ||
329 ((dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS) &&
330 (dp->i_d.di_anextents == 0))) {
333 * Build initial attribute list (if required).
335 if (dp->i_d.di_aformat == XFS_DINODE_FMT_EXTENTS)
336 xfs_attr_shortform_create(&args);
339 * Try to add the attr to the attribute list in
342 error = xfs_attr_shortform_addname(&args);
343 if (error != ENOSPC) {
345 * Commit the shortform mods, and we're done.
346 * NOTE: this is also the error path (EEXIST, etc).
348 ASSERT(args.trans != NULL);
351 * If this is a synchronous mount, make sure that
352 * the transaction goes to disk before returning
355 if (mp->m_flags & XFS_MOUNT_WSYNC) {
356 xfs_trans_set_sync(args.trans);
359 if (!error && (flags & ATTR_KERNOTIME) == 0) {
360 xfs_trans_ichgtime(args.trans, dp,
363 err2 = xfs_trans_commit(args.trans,
364 XFS_TRANS_RELEASE_LOG_RES);
365 xfs_iunlock(dp, XFS_ILOCK_EXCL);
367 return(error == 0 ? err2 : error);
371 * It won't fit in the shortform, transform to a leaf block.
372 * GROT: another possible req'mt for a double-split btree op.
374 xfs_bmap_init(args.flist, args.firstblock);
375 error = xfs_attr_shortform_to_leaf(&args);
377 error = xfs_bmap_finish(&args.trans, args.flist,
383 xfs_bmap_cancel(&flist);
388 * bmap_finish() may have committed the last trans and started
389 * a new one. We need the inode to be in all transactions.
392 xfs_trans_ijoin(args.trans, dp, 0);
395 * Commit the leaf transformation. We'll need another (linked)
396 * transaction to add the new attribute to the leaf.
399 error = xfs_trans_roll(&args.trans, dp);
405 if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
406 error = xfs_attr_leaf_addname(&args);
408 error = xfs_attr_node_addname(&args);
415 * If this is a synchronous mount, make sure that the
416 * transaction goes to disk before returning to the user.
418 if (mp->m_flags & XFS_MOUNT_WSYNC) {
419 xfs_trans_set_sync(args.trans);
422 if ((flags & ATTR_KERNOTIME) == 0)
423 xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG);
426 * Commit the last in the sequence of transactions.
428 xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE);
429 error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES);
430 xfs_iunlock(dp, XFS_ILOCK_EXCL);
436 xfs_trans_cancel(args.trans,
437 XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
438 xfs_iunlock(dp, XFS_ILOCK_EXCL);
445 const unsigned char *name,
446 unsigned char *value,
451 struct xfs_name xname;
453 XFS_STATS_INC(xs_attr_set);
455 if (XFS_FORCED_SHUTDOWN(dp->i_mount))
458 error = xfs_attr_name_to_xname(&xname, name);
462 return xfs_attr_set_int(dp, &xname, value, valuelen, flags);
466 * Generic handler routine to remove a name from an attribute list.
467 * Transitions attribute list from Btree to shortform as necessary.
470 xfs_attr_remove_int(xfs_inode_t *dp, struct xfs_name *name, int flags)
473 xfs_fsblock_t firstblock;
474 xfs_bmap_free_t flist;
476 xfs_mount_t *mp = dp->i_mount;
479 * Fill in the arg structure for this request.
481 memset((char *)&args, 0, sizeof(args));
482 args.name = name->name;
483 args.namelen = name->len;
485 args.hashval = xfs_da_hashname(args.name, args.namelen);
487 args.firstblock = &firstblock;
490 args.whichfork = XFS_ATTR_FORK;
493 * we have no control over the attribute names that userspace passes us
494 * to remove, so we have to allow the name lookup prior to attribute
497 args.op_flags = XFS_DA_OP_OKNOENT;
500 * Attach the dquots to the inode.
502 error = xfs_qm_dqattach(dp, 0);
507 * Start our first transaction of the day.
509 * All future transactions during this code must be "chained" off
510 * this one via the trans_dup() call. All transactions will contain
511 * the inode, and the inode will always be marked with trans_ihold().
512 * Since the inode will be locked in all transactions, we must log
513 * the inode in every transaction to let it float upward through
516 args.trans = xfs_trans_alloc(mp, XFS_TRANS_ATTR_RM);
519 * Root fork attributes can use reserved data blocks for this
520 * operation if necessary
523 if (flags & ATTR_ROOT)
524 args.trans->t_flags |= XFS_TRANS_RESERVE;
526 if ((error = xfs_trans_reserve(args.trans,
527 XFS_ATTRRM_SPACE_RES(mp),
528 XFS_ATTRRM_LOG_RES(mp),
529 0, XFS_TRANS_PERM_LOG_RES,
530 XFS_ATTRRM_LOG_COUNT))) {
531 xfs_trans_cancel(args.trans, 0);
535 xfs_ilock(dp, XFS_ILOCK_EXCL);
537 * No need to make quota reservations here. We expect to release some
538 * blocks not allocate in the common case.
540 xfs_trans_ijoin(args.trans, dp, 0);
543 * Decide on what work routines to call based on the inode size.
545 if (!xfs_inode_hasattr(dp)) {
546 error = XFS_ERROR(ENOATTR);
549 if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
550 ASSERT(dp->i_afp->if_flags & XFS_IFINLINE);
551 error = xfs_attr_shortform_remove(&args);
555 } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
556 error = xfs_attr_leaf_removename(&args);
558 error = xfs_attr_node_removename(&args);
565 * If this is a synchronous mount, make sure that the
566 * transaction goes to disk before returning to the user.
568 if (mp->m_flags & XFS_MOUNT_WSYNC) {
569 xfs_trans_set_sync(args.trans);
572 if ((flags & ATTR_KERNOTIME) == 0)
573 xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG);
576 * Commit the last in the sequence of transactions.
578 xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE);
579 error = xfs_trans_commit(args.trans, XFS_TRANS_RELEASE_LOG_RES);
580 xfs_iunlock(dp, XFS_ILOCK_EXCL);
586 xfs_trans_cancel(args.trans,
587 XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
588 xfs_iunlock(dp, XFS_ILOCK_EXCL);
595 const unsigned char *name,
599 struct xfs_name xname;
601 XFS_STATS_INC(xs_attr_remove);
603 if (XFS_FORCED_SHUTDOWN(dp->i_mount))
606 error = xfs_attr_name_to_xname(&xname, name);
610 xfs_ilock(dp, XFS_ILOCK_SHARED);
611 if (!xfs_inode_hasattr(dp)) {
612 xfs_iunlock(dp, XFS_ILOCK_SHARED);
613 return XFS_ERROR(ENOATTR);
615 xfs_iunlock(dp, XFS_ILOCK_SHARED);
617 return xfs_attr_remove_int(dp, &xname, flags);
621 xfs_attr_list_int(xfs_attr_list_context_t *context)
624 xfs_inode_t *dp = context->dp;
626 XFS_STATS_INC(xs_attr_list);
628 if (XFS_FORCED_SHUTDOWN(dp->i_mount))
631 xfs_ilock(dp, XFS_ILOCK_SHARED);
634 * Decide on what work routines to call based on the inode size.
636 if (!xfs_inode_hasattr(dp)) {
638 } else if (dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
639 error = xfs_attr_shortform_list(context);
640 } else if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
641 error = xfs_attr_leaf_list(context);
643 error = xfs_attr_node_list(context);
646 xfs_iunlock(dp, XFS_ILOCK_SHARED);
651 #define ATTR_ENTBASESIZE /* minimum bytes used by an attr */ \
652 (((struct attrlist_ent *) 0)->a_name - (char *) 0)
653 #define ATTR_ENTSIZE(namelen) /* actual bytes used by an attr */ \
654 ((ATTR_ENTBASESIZE + (namelen) + 1 + sizeof(u_int32_t)-1) \
655 & ~(sizeof(u_int32_t)-1))
658 * Format an attribute and copy it out to the user's buffer.
659 * Take care to check values and protect against them changing later,
660 * we may be reading them directly out of a user buffer.
664 xfs_attr_put_listent(
665 xfs_attr_list_context_t *context,
670 unsigned char *value)
672 struct attrlist *alist = (struct attrlist *)context->alist;
676 ASSERT(!(context->flags & ATTR_KERNOVAL));
677 ASSERT(context->count >= 0);
678 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
679 ASSERT(context->firstu >= sizeof(*alist));
680 ASSERT(context->firstu <= context->bufsize);
683 * Only list entries in the right namespace.
685 if (((context->flags & ATTR_SECURE) == 0) !=
686 ((flags & XFS_ATTR_SECURE) == 0))
688 if (((context->flags & ATTR_ROOT) == 0) !=
689 ((flags & XFS_ATTR_ROOT) == 0))
692 arraytop = sizeof(*alist) +
693 context->count * sizeof(alist->al_offset[0]);
694 context->firstu -= ATTR_ENTSIZE(namelen);
695 if (context->firstu < arraytop) {
696 trace_xfs_attr_list_full(context);
698 context->seen_enough = 1;
702 aep = (attrlist_ent_t *)&context->alist[context->firstu];
703 aep->a_valuelen = valuelen;
704 memcpy(aep->a_name, name, namelen);
705 aep->a_name[namelen] = 0;
706 alist->al_offset[context->count++] = context->firstu;
707 alist->al_count = context->count;
708 trace_xfs_attr_list_add(context);
713 * Generate a list of extended attribute names and optionally
714 * also value lengths. Positive return value follows the XFS
715 * convention of being an error, zero or negative return code
716 * is the length of the buffer returned (negated), indicating
725 attrlist_cursor_kern_t *cursor)
727 xfs_attr_list_context_t context;
728 struct attrlist *alist;
732 * Validate the cursor.
734 if (cursor->pad1 || cursor->pad2)
735 return(XFS_ERROR(EINVAL));
736 if ((cursor->initted == 0) &&
737 (cursor->hashval || cursor->blkno || cursor->offset))
738 return XFS_ERROR(EINVAL);
741 * Check for a properly aligned buffer.
743 if (((long)buffer) & (sizeof(int)-1))
744 return XFS_ERROR(EFAULT);
745 if (flags & ATTR_KERNOVAL)
749 * Initialize the output buffer.
751 memset(&context, 0, sizeof(context));
753 context.cursor = cursor;
755 context.flags = flags;
756 context.alist = buffer;
757 context.bufsize = (bufsize & ~(sizeof(int)-1)); /* align */
758 context.firstu = context.bufsize;
759 context.put_listent = xfs_attr_put_listent;
761 alist = (struct attrlist *)context.alist;
764 alist->al_offset[0] = context.bufsize;
766 error = xfs_attr_list_int(&context);
772 xfs_attr_inactive(xfs_inode_t *dp)
779 ASSERT(! XFS_NOT_DQATTACHED(mp, dp));
781 xfs_ilock(dp, XFS_ILOCK_SHARED);
782 if (!xfs_inode_hasattr(dp) ||
783 dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
784 xfs_iunlock(dp, XFS_ILOCK_SHARED);
787 xfs_iunlock(dp, XFS_ILOCK_SHARED);
790 * Start our first transaction of the day.
792 * All future transactions during this code must be "chained" off
793 * this one via the trans_dup() call. All transactions will contain
794 * the inode, and the inode will always be marked with trans_ihold().
795 * Since the inode will be locked in all transactions, we must log
796 * the inode in every transaction to let it float upward through
799 trans = xfs_trans_alloc(mp, XFS_TRANS_ATTRINVAL);
800 if ((error = xfs_trans_reserve(trans, 0, XFS_ATTRINVAL_LOG_RES(mp), 0,
801 XFS_TRANS_PERM_LOG_RES,
802 XFS_ATTRINVAL_LOG_COUNT))) {
803 xfs_trans_cancel(trans, 0);
806 xfs_ilock(dp, XFS_ILOCK_EXCL);
809 * No need to make quota reservations here. We expect to release some
810 * blocks, not allocate, in the common case.
812 xfs_trans_ijoin(trans, dp, 0);
815 * Decide on what work routines to call based on the inode size.
817 if (!xfs_inode_hasattr(dp) ||
818 dp->i_d.di_aformat == XFS_DINODE_FMT_LOCAL) {
822 error = xfs_attr_root_inactive(&trans, dp);
826 error = xfs_itruncate_extents(&trans, dp, XFS_ATTR_FORK, 0);
830 error = xfs_trans_commit(trans, XFS_TRANS_RELEASE_LOG_RES);
831 xfs_iunlock(dp, XFS_ILOCK_EXCL);
836 xfs_trans_cancel(trans, XFS_TRANS_RELEASE_LOG_RES|XFS_TRANS_ABORT);
837 xfs_iunlock(dp, XFS_ILOCK_EXCL);
843 /*========================================================================
844 * External routines when attribute list is inside the inode
845 *========================================================================*/
848 * Add a name to the shortform attribute list structure
849 * This is the external routine.
852 xfs_attr_shortform_addname(xfs_da_args_t *args)
854 int newsize, forkoff, retval;
856 trace_xfs_attr_sf_addname(args);
858 retval = xfs_attr_shortform_lookup(args);
859 if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
861 } else if (retval == EEXIST) {
862 if (args->flags & ATTR_CREATE)
864 retval = xfs_attr_shortform_remove(args);
868 if (args->namelen >= XFS_ATTR_SF_ENTSIZE_MAX ||
869 args->valuelen >= XFS_ATTR_SF_ENTSIZE_MAX)
870 return(XFS_ERROR(ENOSPC));
872 newsize = XFS_ATTR_SF_TOTSIZE(args->dp);
873 newsize += XFS_ATTR_SF_ENTSIZE_BYNAME(args->namelen, args->valuelen);
875 forkoff = xfs_attr_shortform_bytesfit(args->dp, newsize);
877 return(XFS_ERROR(ENOSPC));
879 xfs_attr_shortform_add(args, forkoff);
884 /*========================================================================
885 * External routines when attribute list is one block
886 *========================================================================*/
889 * Add a name to the leaf attribute list structure
891 * This leaf block cannot have a "remote" value, we only call this routine
892 * if bmap_one_block() says there is only one block (ie: no remote blks).
895 xfs_attr_leaf_addname(xfs_da_args_t *args)
899 int retval, error, committed, forkoff;
901 trace_xfs_attr_leaf_addname(args);
904 * Read the (only) block in the attribute list in.
908 error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
915 * Look up the given attribute in the leaf block. Figure out if
916 * the given flags produce an error or call for an atomic rename.
918 retval = xfs_attr_leaf_lookup_int(bp, args);
919 if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
920 xfs_da_brelse(args->trans, bp);
922 } else if (retval == EEXIST) {
923 if (args->flags & ATTR_CREATE) { /* pure create op */
924 xfs_da_brelse(args->trans, bp);
928 trace_xfs_attr_leaf_replace(args);
930 args->op_flags |= XFS_DA_OP_RENAME; /* an atomic rename */
931 args->blkno2 = args->blkno; /* set 2nd entry info*/
932 args->index2 = args->index;
933 args->rmtblkno2 = args->rmtblkno;
934 args->rmtblkcnt2 = args->rmtblkcnt;
938 * Add the attribute to the leaf block, transitioning to a Btree
941 retval = xfs_attr_leaf_add(bp, args);
943 if (retval == ENOSPC) {
945 * Promote the attribute list to the Btree format, then
946 * Commit that transaction so that the node_addname() call
947 * can manage its own transactions.
949 xfs_bmap_init(args->flist, args->firstblock);
950 error = xfs_attr_leaf_to_node(args);
952 error = xfs_bmap_finish(&args->trans, args->flist,
958 xfs_bmap_cancel(args->flist);
963 * bmap_finish() may have committed the last trans and started
964 * a new one. We need the inode to be in all transactions.
967 xfs_trans_ijoin(args->trans, dp, 0);
970 * Commit the current trans (including the inode) and start
973 error = xfs_trans_roll(&args->trans, dp);
978 * Fob the whole rest of the problem off on the Btree code.
980 error = xfs_attr_node_addname(args);
985 * Commit the transaction that added the attr name so that
986 * later routines can manage their own transactions.
988 error = xfs_trans_roll(&args->trans, dp);
993 * If there was an out-of-line value, allocate the blocks we
994 * identified for its storage and copy the value. This is done
995 * after we create the attribute so that we don't overflow the
996 * maximum size of a transaction and/or hit a deadlock.
998 if (args->rmtblkno > 0) {
999 error = xfs_attr_rmtval_set(args);
1005 * If this is an atomic rename operation, we must "flip" the
1006 * incomplete flags on the "new" and "old" attribute/value pairs
1007 * so that one disappears and one appears atomically. Then we
1008 * must remove the "old" attribute/value pair.
1010 if (args->op_flags & XFS_DA_OP_RENAME) {
1012 * In a separate transaction, set the incomplete flag on the
1013 * "old" attr and clear the incomplete flag on the "new" attr.
1015 error = xfs_attr_leaf_flipflags(args);
1020 * Dismantle the "old" attribute/value pair by removing
1021 * a "remote" value (if it exists).
1023 args->index = args->index2;
1024 args->blkno = args->blkno2;
1025 args->rmtblkno = args->rmtblkno2;
1026 args->rmtblkcnt = args->rmtblkcnt2;
1027 if (args->rmtblkno) {
1028 error = xfs_attr_rmtval_remove(args);
1034 * Read in the block containing the "old" attr, then
1035 * remove the "old" attr from that block (neat, huh!)
1037 error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1,
1038 &bp, XFS_ATTR_FORK);
1042 (void)xfs_attr_leaf_remove(bp, args);
1045 * If the result is small enough, shrink it all into the inode.
1047 if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
1048 xfs_bmap_init(args->flist, args->firstblock);
1049 error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
1050 /* bp is gone due to xfs_da_shrink_inode */
1052 error = xfs_bmap_finish(&args->trans,
1059 xfs_bmap_cancel(args->flist);
1064 * bmap_finish() may have committed the last trans
1065 * and started a new one. We need the inode to be
1066 * in all transactions.
1069 xfs_trans_ijoin(args->trans, dp, 0);
1071 xfs_da_buf_done(bp);
1074 * Commit the remove and start the next trans in series.
1076 error = xfs_trans_roll(&args->trans, dp);
1078 } else if (args->rmtblkno > 0) {
1080 * Added a "remote" value, just clear the incomplete flag.
1082 error = xfs_attr_leaf_clearflag(args);
1088 * Remove a name from the leaf attribute list structure
1090 * This leaf block cannot have a "remote" value, we only call this routine
1091 * if bmap_one_block() says there is only one block (ie: no remote blks).
1094 xfs_attr_leaf_removename(xfs_da_args_t *args)
1098 int error, committed, forkoff;
1100 trace_xfs_attr_leaf_removename(args);
1103 * Remove the attribute.
1107 error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
1114 error = xfs_attr_leaf_lookup_int(bp, args);
1115 if (error == ENOATTR) {
1116 xfs_da_brelse(args->trans, bp);
1120 (void)xfs_attr_leaf_remove(bp, args);
1123 * If the result is small enough, shrink it all into the inode.
1125 if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
1126 xfs_bmap_init(args->flist, args->firstblock);
1127 error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
1128 /* bp is gone due to xfs_da_shrink_inode */
1130 error = xfs_bmap_finish(&args->trans, args->flist,
1136 xfs_bmap_cancel(args->flist);
1141 * bmap_finish() may have committed the last trans and started
1142 * a new one. We need the inode to be in all transactions.
1145 xfs_trans_ijoin(args->trans, dp, 0);
1147 xfs_da_buf_done(bp);
1152 * Look up a name in a leaf attribute list structure.
1154 * This leaf block cannot have a "remote" value, we only call this routine
1155 * if bmap_one_block() says there is only one block (ie: no remote blks).
1158 xfs_attr_leaf_get(xfs_da_args_t *args)
1164 error = xfs_da_read_buf(args->trans, args->dp, args->blkno, -1, &bp,
1170 error = xfs_attr_leaf_lookup_int(bp, args);
1171 if (error != EEXIST) {
1172 xfs_da_brelse(args->trans, bp);
1175 error = xfs_attr_leaf_getvalue(bp, args);
1176 xfs_da_brelse(args->trans, bp);
1177 if (!error && (args->rmtblkno > 0) && !(args->flags & ATTR_KERNOVAL)) {
1178 error = xfs_attr_rmtval_get(args);
1184 * Copy out attribute entries for attr_list(), for leaf attribute lists.
1187 xfs_attr_leaf_list(xfs_attr_list_context_t *context)
1189 xfs_attr_leafblock_t *leaf;
1193 context->cursor->blkno = 0;
1194 error = xfs_da_read_buf(NULL, context->dp, 0, -1, &bp, XFS_ATTR_FORK);
1196 return XFS_ERROR(error);
1199 if (unlikely(leaf->hdr.info.magic != cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) {
1200 XFS_CORRUPTION_ERROR("xfs_attr_leaf_list", XFS_ERRLEVEL_LOW,
1201 context->dp->i_mount, leaf);
1202 xfs_da_brelse(NULL, bp);
1203 return XFS_ERROR(EFSCORRUPTED);
1206 error = xfs_attr_leaf_list_int(bp, context);
1207 xfs_da_brelse(NULL, bp);
1208 return XFS_ERROR(error);
1212 /*========================================================================
1213 * External routines when attribute list size > XFS_LBSIZE(mp).
1214 *========================================================================*/
1217 * Add a name to a Btree-format attribute list.
1219 * This will involve walking down the Btree, and may involve splitting
1220 * leaf nodes and even splitting intermediate nodes up to and including
1221 * the root node (a special case of an intermediate node).
1223 * "Remote" attribute values confuse the issue and atomic rename operations
1224 * add a whole extra layer of confusion on top of that.
1227 xfs_attr_node_addname(xfs_da_args_t *args)
1229 xfs_da_state_t *state;
1230 xfs_da_state_blk_t *blk;
1233 int committed, retval, error;
1235 trace_xfs_attr_node_addname(args);
1238 * Fill in bucket of arguments/results/context to carry around.
1243 state = xfs_da_state_alloc();
1246 state->blocksize = state->mp->m_sb.sb_blocksize;
1247 state->node_ents = state->mp->m_attr_node_ents;
1250 * Search to see if name already exists, and get back a pointer
1251 * to where it should go.
1253 error = xfs_da_node_lookup_int(state, &retval);
1256 blk = &state->path.blk[ state->path.active-1 ];
1257 ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
1258 if ((args->flags & ATTR_REPLACE) && (retval == ENOATTR)) {
1260 } else if (retval == EEXIST) {
1261 if (args->flags & ATTR_CREATE)
1264 trace_xfs_attr_node_replace(args);
1266 args->op_flags |= XFS_DA_OP_RENAME; /* atomic rename op */
1267 args->blkno2 = args->blkno; /* set 2nd entry info*/
1268 args->index2 = args->index;
1269 args->rmtblkno2 = args->rmtblkno;
1270 args->rmtblkcnt2 = args->rmtblkcnt;
1272 args->rmtblkcnt = 0;
1275 retval = xfs_attr_leaf_add(blk->bp, state->args);
1276 if (retval == ENOSPC) {
1277 if (state->path.active == 1) {
1279 * Its really a single leaf node, but it had
1280 * out-of-line values so it looked like it *might*
1281 * have been a b-tree.
1283 xfs_da_state_free(state);
1284 xfs_bmap_init(args->flist, args->firstblock);
1285 error = xfs_attr_leaf_to_node(args);
1287 error = xfs_bmap_finish(&args->trans,
1294 xfs_bmap_cancel(args->flist);
1299 * bmap_finish() may have committed the last trans
1300 * and started a new one. We need the inode to be
1301 * in all transactions.
1304 xfs_trans_ijoin(args->trans, dp, 0);
1307 * Commit the node conversion and start the next
1308 * trans in the chain.
1310 error = xfs_trans_roll(&args->trans, dp);
1318 * Split as many Btree elements as required.
1319 * This code tracks the new and old attr's location
1320 * in the index/blkno/rmtblkno/rmtblkcnt fields and
1321 * in the index2/blkno2/rmtblkno2/rmtblkcnt2 fields.
1323 xfs_bmap_init(args->flist, args->firstblock);
1324 error = xfs_da_split(state);
1326 error = xfs_bmap_finish(&args->trans, args->flist,
1332 xfs_bmap_cancel(args->flist);
1337 * bmap_finish() may have committed the last trans and started
1338 * a new one. We need the inode to be in all transactions.
1341 xfs_trans_ijoin(args->trans, dp, 0);
1344 * Addition succeeded, update Btree hashvals.
1346 xfs_da_fixhashpath(state, &state->path);
1350 * Kill the state structure, we're done with it and need to
1351 * allow the buffers to come back later.
1353 xfs_da_state_free(state);
1357 * Commit the leaf addition or btree split and start the next
1358 * trans in the chain.
1360 error = xfs_trans_roll(&args->trans, dp);
1365 * If there was an out-of-line value, allocate the blocks we
1366 * identified for its storage and copy the value. This is done
1367 * after we create the attribute so that we don't overflow the
1368 * maximum size of a transaction and/or hit a deadlock.
1370 if (args->rmtblkno > 0) {
1371 error = xfs_attr_rmtval_set(args);
1377 * If this is an atomic rename operation, we must "flip" the
1378 * incomplete flags on the "new" and "old" attribute/value pairs
1379 * so that one disappears and one appears atomically. Then we
1380 * must remove the "old" attribute/value pair.
1382 if (args->op_flags & XFS_DA_OP_RENAME) {
1384 * In a separate transaction, set the incomplete flag on the
1385 * "old" attr and clear the incomplete flag on the "new" attr.
1387 error = xfs_attr_leaf_flipflags(args);
1392 * Dismantle the "old" attribute/value pair by removing
1393 * a "remote" value (if it exists).
1395 args->index = args->index2;
1396 args->blkno = args->blkno2;
1397 args->rmtblkno = args->rmtblkno2;
1398 args->rmtblkcnt = args->rmtblkcnt2;
1399 if (args->rmtblkno) {
1400 error = xfs_attr_rmtval_remove(args);
1406 * Re-find the "old" attribute entry after any split ops.
1407 * The INCOMPLETE flag means that we will find the "old"
1408 * attr, not the "new" one.
1410 args->flags |= XFS_ATTR_INCOMPLETE;
1411 state = xfs_da_state_alloc();
1414 state->blocksize = state->mp->m_sb.sb_blocksize;
1415 state->node_ents = state->mp->m_attr_node_ents;
1417 error = xfs_da_node_lookup_int(state, &retval);
1422 * Remove the name and update the hashvals in the tree.
1424 blk = &state->path.blk[ state->path.active-1 ];
1425 ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
1426 error = xfs_attr_leaf_remove(blk->bp, args);
1427 xfs_da_fixhashpath(state, &state->path);
1430 * Check to see if the tree needs to be collapsed.
1432 if (retval && (state->path.active > 1)) {
1433 xfs_bmap_init(args->flist, args->firstblock);
1434 error = xfs_da_join(state);
1436 error = xfs_bmap_finish(&args->trans,
1443 xfs_bmap_cancel(args->flist);
1448 * bmap_finish() may have committed the last trans
1449 * and started a new one. We need the inode to be
1450 * in all transactions.
1453 xfs_trans_ijoin(args->trans, dp, 0);
1457 * Commit and start the next trans in the chain.
1459 error = xfs_trans_roll(&args->trans, dp);
1463 } else if (args->rmtblkno > 0) {
1465 * Added a "remote" value, just clear the incomplete flag.
1467 error = xfs_attr_leaf_clearflag(args);
1475 xfs_da_state_free(state);
1482 * Remove a name from a B-tree attribute list.
1484 * This will involve walking down the Btree, and may involve joining
1485 * leaf nodes and even joining intermediate nodes up to and including
1486 * the root node (a special case of an intermediate node).
1489 xfs_attr_node_removename(xfs_da_args_t *args)
1491 xfs_da_state_t *state;
1492 xfs_da_state_blk_t *blk;
1495 int retval, error, committed, forkoff;
1497 trace_xfs_attr_node_removename(args);
1500 * Tie a string around our finger to remind us where we are.
1503 state = xfs_da_state_alloc();
1505 state->mp = dp->i_mount;
1506 state->blocksize = state->mp->m_sb.sb_blocksize;
1507 state->node_ents = state->mp->m_attr_node_ents;
1510 * Search to see if name exists, and get back a pointer to it.
1512 error = xfs_da_node_lookup_int(state, &retval);
1513 if (error || (retval != EEXIST)) {
1520 * If there is an out-of-line value, de-allocate the blocks.
1521 * This is done before we remove the attribute so that we don't
1522 * overflow the maximum size of a transaction and/or hit a deadlock.
1524 blk = &state->path.blk[ state->path.active-1 ];
1525 ASSERT(blk->bp != NULL);
1526 ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
1527 if (args->rmtblkno > 0) {
1529 * Fill in disk block numbers in the state structure
1530 * so that we can get the buffers back after we commit
1531 * several transactions in the following calls.
1533 error = xfs_attr_fillstate(state);
1538 * Mark the attribute as INCOMPLETE, then bunmapi() the
1541 error = xfs_attr_leaf_setflag(args);
1544 error = xfs_attr_rmtval_remove(args);
1549 * Refill the state structure with buffers, the prior calls
1550 * released our buffers.
1552 error = xfs_attr_refillstate(state);
1558 * Remove the name and update the hashvals in the tree.
1560 blk = &state->path.blk[ state->path.active-1 ];
1561 ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
1562 retval = xfs_attr_leaf_remove(blk->bp, args);
1563 xfs_da_fixhashpath(state, &state->path);
1566 * Check to see if the tree needs to be collapsed.
1568 if (retval && (state->path.active > 1)) {
1569 xfs_bmap_init(args->flist, args->firstblock);
1570 error = xfs_da_join(state);
1572 error = xfs_bmap_finish(&args->trans, args->flist,
1578 xfs_bmap_cancel(args->flist);
1583 * bmap_finish() may have committed the last trans and started
1584 * a new one. We need the inode to be in all transactions.
1587 xfs_trans_ijoin(args->trans, dp, 0);
1590 * Commit the Btree join operation and start a new trans.
1592 error = xfs_trans_roll(&args->trans, dp);
1598 * If the result is small enough, push it all into the inode.
1600 if (xfs_bmap_one_block(dp, XFS_ATTR_FORK)) {
1602 * Have to get rid of the copy of this dabuf in the state.
1604 ASSERT(state->path.active == 1);
1605 ASSERT(state->path.blk[0].bp);
1606 xfs_da_buf_done(state->path.blk[0].bp);
1607 state->path.blk[0].bp = NULL;
1609 error = xfs_da_read_buf(args->trans, args->dp, 0, -1, &bp,
1613 ASSERT((((xfs_attr_leafblock_t *)bp->data)->hdr.info.magic) ==
1614 cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
1616 if ((forkoff = xfs_attr_shortform_allfit(bp, dp))) {
1617 xfs_bmap_init(args->flist, args->firstblock);
1618 error = xfs_attr_leaf_to_shortform(bp, args, forkoff);
1619 /* bp is gone due to xfs_da_shrink_inode */
1621 error = xfs_bmap_finish(&args->trans,
1628 xfs_bmap_cancel(args->flist);
1633 * bmap_finish() may have committed the last trans
1634 * and started a new one. We need the inode to be
1635 * in all transactions.
1638 xfs_trans_ijoin(args->trans, dp, 0);
1640 xfs_da_brelse(args->trans, bp);
1645 xfs_da_state_free(state);
1650 * Fill in the disk block numbers in the state structure for the buffers
1651 * that are attached to the state structure.
1652 * This is done so that we can quickly reattach ourselves to those buffers
1653 * after some set of transaction commits have released these buffers.
1656 xfs_attr_fillstate(xfs_da_state_t *state)
1658 xfs_da_state_path_t *path;
1659 xfs_da_state_blk_t *blk;
1663 * Roll down the "path" in the state structure, storing the on-disk
1664 * block number for those buffers in the "path".
1666 path = &state->path;
1667 ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
1668 for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
1670 blk->disk_blkno = xfs_da_blkno(blk->bp);
1671 xfs_da_buf_done(blk->bp);
1674 blk->disk_blkno = 0;
1679 * Roll down the "altpath" in the state structure, storing the on-disk
1680 * block number for those buffers in the "altpath".
1682 path = &state->altpath;
1683 ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
1684 for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
1686 blk->disk_blkno = xfs_da_blkno(blk->bp);
1687 xfs_da_buf_done(blk->bp);
1690 blk->disk_blkno = 0;
1698 * Reattach the buffers to the state structure based on the disk block
1699 * numbers stored in the state structure.
1700 * This is done after some set of transaction commits have released those
1701 * buffers from our grip.
1704 xfs_attr_refillstate(xfs_da_state_t *state)
1706 xfs_da_state_path_t *path;
1707 xfs_da_state_blk_t *blk;
1711 * Roll down the "path" in the state structure, storing the on-disk
1712 * block number for those buffers in the "path".
1714 path = &state->path;
1715 ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
1716 for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
1717 if (blk->disk_blkno) {
1718 error = xfs_da_read_buf(state->args->trans,
1720 blk->blkno, blk->disk_blkno,
1721 &blk->bp, XFS_ATTR_FORK);
1730 * Roll down the "altpath" in the state structure, storing the on-disk
1731 * block number for those buffers in the "altpath".
1733 path = &state->altpath;
1734 ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
1735 for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
1736 if (blk->disk_blkno) {
1737 error = xfs_da_read_buf(state->args->trans,
1739 blk->blkno, blk->disk_blkno,
1740 &blk->bp, XFS_ATTR_FORK);
1752 * Look up a filename in a node attribute list.
1754 * This routine gets called for any attribute fork that has more than one
1755 * block, ie: both true Btree attr lists and for single-leaf-blocks with
1756 * "remote" values taking up more blocks.
1759 xfs_attr_node_get(xfs_da_args_t *args)
1761 xfs_da_state_t *state;
1762 xfs_da_state_blk_t *blk;
1766 state = xfs_da_state_alloc();
1768 state->mp = args->dp->i_mount;
1769 state->blocksize = state->mp->m_sb.sb_blocksize;
1770 state->node_ents = state->mp->m_attr_node_ents;
1773 * Search to see if name exists, and get back a pointer to it.
1775 error = xfs_da_node_lookup_int(state, &retval);
1778 } else if (retval == EEXIST) {
1779 blk = &state->path.blk[ state->path.active-1 ];
1780 ASSERT(blk->bp != NULL);
1781 ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC);
1784 * Get the value, local or "remote"
1786 retval = xfs_attr_leaf_getvalue(blk->bp, args);
1787 if (!retval && (args->rmtblkno > 0)
1788 && !(args->flags & ATTR_KERNOVAL)) {
1789 retval = xfs_attr_rmtval_get(args);
1794 * If not in a transaction, we have to release all the buffers.
1796 for (i = 0; i < state->path.active; i++) {
1797 xfs_da_brelse(args->trans, state->path.blk[i].bp);
1798 state->path.blk[i].bp = NULL;
1801 xfs_da_state_free(state);
1805 STATIC int /* error */
1806 xfs_attr_node_list(xfs_attr_list_context_t *context)
1808 attrlist_cursor_kern_t *cursor;
1809 xfs_attr_leafblock_t *leaf;
1810 xfs_da_intnode_t *node;
1811 xfs_da_node_entry_t *btree;
1815 cursor = context->cursor;
1816 cursor->initted = 1;
1819 * Do all sorts of validation on the passed-in cursor structure.
1820 * If anything is amiss, ignore the cursor and look up the hashval
1821 * starting from the btree root.
1824 if (cursor->blkno > 0) {
1825 error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1,
1826 &bp, XFS_ATTR_FORK);
1827 if ((error != 0) && (error != EFSCORRUPTED))
1831 switch (be16_to_cpu(node->hdr.info.magic)) {
1832 case XFS_DA_NODE_MAGIC:
1833 trace_xfs_attr_list_wrong_blk(context);
1834 xfs_da_brelse(NULL, bp);
1837 case XFS_ATTR_LEAF_MAGIC:
1839 if (cursor->hashval > be32_to_cpu(leaf->entries[
1840 be16_to_cpu(leaf->hdr.count)-1].hashval)) {
1841 trace_xfs_attr_list_wrong_blk(context);
1842 xfs_da_brelse(NULL, bp);
1844 } else if (cursor->hashval <=
1845 be32_to_cpu(leaf->entries[0].hashval)) {
1846 trace_xfs_attr_list_wrong_blk(context);
1847 xfs_da_brelse(NULL, bp);
1852 trace_xfs_attr_list_wrong_blk(context);
1853 xfs_da_brelse(NULL, bp);
1860 * We did not find what we expected given the cursor's contents,
1861 * so we start from the top and work down based on the hash value.
1862 * Note that start of node block is same as start of leaf block.
1867 error = xfs_da_read_buf(NULL, context->dp,
1868 cursor->blkno, -1, &bp,
1872 if (unlikely(bp == NULL)) {
1873 XFS_ERROR_REPORT("xfs_attr_node_list(2)",
1875 context->dp->i_mount);
1876 return(XFS_ERROR(EFSCORRUPTED));
1879 if (node->hdr.info.magic ==
1880 cpu_to_be16(XFS_ATTR_LEAF_MAGIC))
1882 if (unlikely(node->hdr.info.magic !=
1883 cpu_to_be16(XFS_DA_NODE_MAGIC))) {
1884 XFS_CORRUPTION_ERROR("xfs_attr_node_list(3)",
1886 context->dp->i_mount,
1888 xfs_da_brelse(NULL, bp);
1889 return(XFS_ERROR(EFSCORRUPTED));
1891 btree = node->btree;
1892 for (i = 0; i < be16_to_cpu(node->hdr.count);
1895 <= be32_to_cpu(btree->hashval)) {
1896 cursor->blkno = be32_to_cpu(btree->before);
1897 trace_xfs_attr_list_node_descend(context,
1902 if (i == be16_to_cpu(node->hdr.count)) {
1903 xfs_da_brelse(NULL, bp);
1906 xfs_da_brelse(NULL, bp);
1912 * Roll upward through the blocks, processing each leaf block in
1913 * order. As long as there is space in the result buffer, keep
1914 * adding the information.
1918 if (unlikely(leaf->hdr.info.magic !=
1919 cpu_to_be16(XFS_ATTR_LEAF_MAGIC))) {
1920 XFS_CORRUPTION_ERROR("xfs_attr_node_list(4)",
1922 context->dp->i_mount, leaf);
1923 xfs_da_brelse(NULL, bp);
1924 return(XFS_ERROR(EFSCORRUPTED));
1926 error = xfs_attr_leaf_list_int(bp, context);
1928 xfs_da_brelse(NULL, bp);
1931 if (context->seen_enough || leaf->hdr.info.forw == 0)
1933 cursor->blkno = be32_to_cpu(leaf->hdr.info.forw);
1934 xfs_da_brelse(NULL, bp);
1935 error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1,
1936 &bp, XFS_ATTR_FORK);
1939 if (unlikely((bp == NULL))) {
1940 XFS_ERROR_REPORT("xfs_attr_node_list(5)",
1942 context->dp->i_mount);
1943 return(XFS_ERROR(EFSCORRUPTED));
1946 xfs_da_brelse(NULL, bp);
1951 /*========================================================================
1952 * External routines for manipulating out-of-line attribute values.
1953 *========================================================================*/
1956 * Read the value associated with an attribute from the out-of-line buffer
1957 * that we stored it in.
1960 xfs_attr_rmtval_get(xfs_da_args_t *args)
1962 xfs_bmbt_irec_t map[ATTR_RMTVALUE_MAPSIZE];
1967 int nmap, error, tmp, valuelen, blkcnt, i;
1970 ASSERT(!(args->flags & ATTR_KERNOVAL));
1972 mp = args->dp->i_mount;
1974 valuelen = args->valuelen;
1975 lblkno = args->rmtblkno;
1976 while (valuelen > 0) {
1977 nmap = ATTR_RMTVALUE_MAPSIZE;
1978 error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno,
1979 args->rmtblkcnt, map, &nmap,
1980 XFS_BMAPI_ATTRFORK);
1985 for (i = 0; (i < nmap) && (valuelen > 0); i++) {
1986 ASSERT((map[i].br_startblock != DELAYSTARTBLOCK) &&
1987 (map[i].br_startblock != HOLESTARTBLOCK));
1988 dblkno = XFS_FSB_TO_DADDR(mp, map[i].br_startblock);
1989 blkcnt = XFS_FSB_TO_BB(mp, map[i].br_blockcount);
1990 error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp,
1991 dblkno, blkcnt, 0, &bp);
1995 tmp = min_t(int, valuelen, BBTOB(bp->b_length));
1996 xfs_buf_iomove(bp, 0, tmp, dst, XBRW_READ);
2001 lblkno += map[i].br_blockcount;
2004 ASSERT(valuelen == 0);
2009 * Write the value associated with an attribute into the out-of-line buffer
2010 * that we have defined for it.
2013 xfs_attr_rmtval_set(xfs_da_args_t *args)
2016 xfs_fileoff_t lfileoff;
2018 xfs_bmbt_irec_t map;
2023 int blkcnt, valuelen, nmap, error, tmp, committed;
2030 * Find a "hole" in the attribute address space large enough for
2031 * us to drop the new attribute's value into.
2033 blkcnt = XFS_B_TO_FSB(mp, args->valuelen);
2035 error = xfs_bmap_first_unused(args->trans, args->dp, blkcnt, &lfileoff,
2040 args->rmtblkno = lblkno = (xfs_dablk_t)lfileoff;
2041 args->rmtblkcnt = blkcnt;
2044 * Roll through the "value", allocating blocks on disk as required.
2046 while (blkcnt > 0) {
2048 * Allocate a single extent, up to the size of the value.
2050 xfs_bmap_init(args->flist, args->firstblock);
2052 error = xfs_bmapi_write(args->trans, dp, (xfs_fileoff_t)lblkno,
2054 XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA,
2055 args->firstblock, args->total, &map, &nmap,
2058 error = xfs_bmap_finish(&args->trans, args->flist,
2064 xfs_bmap_cancel(args->flist);
2069 * bmap_finish() may have committed the last trans and started
2070 * a new one. We need the inode to be in all transactions.
2073 xfs_trans_ijoin(args->trans, dp, 0);
2076 ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
2077 (map.br_startblock != HOLESTARTBLOCK));
2078 lblkno += map.br_blockcount;
2079 blkcnt -= map.br_blockcount;
2082 * Start the next trans in the chain.
2084 error = xfs_trans_roll(&args->trans, dp);
2090 * Roll through the "value", copying the attribute value to the
2091 * already-allocated blocks. Blocks are written synchronously
2092 * so that we can know they are all on disk before we turn off
2093 * the INCOMPLETE flag.
2095 lblkno = args->rmtblkno;
2096 valuelen = args->valuelen;
2097 while (valuelen > 0) {
2101 * Try to remember where we decided to put the value.
2103 xfs_bmap_init(args->flist, args->firstblock);
2105 error = xfs_bmapi_read(dp, (xfs_fileoff_t)lblkno,
2106 args->rmtblkcnt, &map, &nmap,
2107 XFS_BMAPI_ATTRFORK);
2111 ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
2112 (map.br_startblock != HOLESTARTBLOCK));
2114 dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
2115 blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
2117 bp = xfs_buf_get(mp->m_ddev_targp, dblkno, blkcnt, 0);
2121 buflen = BBTOB(bp->b_length);
2122 tmp = min_t(int, valuelen, buflen);
2123 xfs_buf_iomove(bp, 0, tmp, src, XBRW_WRITE);
2125 xfs_buf_zero(bp, tmp, buflen - tmp);
2127 error = xfs_bwrite(bp); /* GROT: NOTE: synchronous write */
2134 lblkno += map.br_blockcount;
2136 ASSERT(valuelen == 0);
2141 * Remove the value associated with an attribute by deleting the
2142 * out-of-line buffer that it is stored on.
2145 xfs_attr_rmtval_remove(xfs_da_args_t *args)
2148 xfs_bmbt_irec_t map;
2152 int valuelen, blkcnt, nmap, error, done, committed;
2154 mp = args->dp->i_mount;
2157 * Roll through the "value", invalidating the attribute value's
2160 lblkno = args->rmtblkno;
2161 valuelen = args->rmtblkcnt;
2162 while (valuelen > 0) {
2164 * Try to remember where we decided to put the value.
2167 error = xfs_bmapi_read(args->dp, (xfs_fileoff_t)lblkno,
2168 args->rmtblkcnt, &map, &nmap,
2169 XFS_BMAPI_ATTRFORK);
2173 ASSERT((map.br_startblock != DELAYSTARTBLOCK) &&
2174 (map.br_startblock != HOLESTARTBLOCK));
2176 dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
2177 blkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
2180 * If the "remote" value is in the cache, remove it.
2182 bp = xfs_incore(mp->m_ddev_targp, dblkno, blkcnt, XBF_TRYLOCK);
2189 valuelen -= map.br_blockcount;
2191 lblkno += map.br_blockcount;
2195 * Keep de-allocating extents until the remote-value region is gone.
2197 lblkno = args->rmtblkno;
2198 blkcnt = args->rmtblkcnt;
2201 xfs_bmap_init(args->flist, args->firstblock);
2202 error = xfs_bunmapi(args->trans, args->dp, lblkno, blkcnt,
2203 XFS_BMAPI_ATTRFORK | XFS_BMAPI_METADATA,
2204 1, args->firstblock, args->flist,
2207 error = xfs_bmap_finish(&args->trans, args->flist,
2213 xfs_bmap_cancel(args->flist);
2218 * bmap_finish() may have committed the last trans and started
2219 * a new one. We need the inode to be in all transactions.
2222 xfs_trans_ijoin(args->trans, args->dp, 0);
2225 * Close out trans and start the next one in the chain.
2227 error = xfs_trans_roll(&args->trans, args->dp);