2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2017, Fedor Uporov
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/types.h>
34 #include <sys/kernel.h>
35 #include <sys/malloc.h>
36 #include <sys/vnode.h>
39 #include <sys/endian.h>
41 #include <sys/extattr.h>
44 #include <fs/ext2fs/fs.h>
45 #include <fs/ext2fs/ext2fs.h>
46 #include <fs/ext2fs/inode.h>
47 #include <fs/ext2fs/ext2_dinode.h>
48 #include <fs/ext2fs/ext2_mount.h>
49 #include <fs/ext2fs/ext2_extattr.h>
50 #include <fs/ext2fs/ext2_extern.h>
52 SDT_PROVIDER_DECLARE(ext2fs);
55 * arg0: verbosity. Higher numbers give more verbose messages
56 * arg1: Textual message
58 SDT_PROBE_DEFINE2(ext2fs, , trace, extattr, "int", "char*");
61 ext2_extattr_attrnamespace_to_bsd(int attrnamespace)
64 switch (attrnamespace) {
65 case EXT4_XATTR_INDEX_SYSTEM:
66 return (EXTATTR_NAMESPACE_SYSTEM);
68 case EXT4_XATTR_INDEX_USER:
69 return (EXTATTR_NAMESPACE_USER);
71 case EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT:
72 return (POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE);
74 case EXT4_XATTR_INDEX_POSIX_ACL_ACCESS:
75 return (POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE);
78 return (EXTATTR_NAMESPACE_EMPTY);
82 ext2_extattr_name_to_bsd(int attrnamespace, const char *name, int* name_len)
85 if (attrnamespace == EXT4_XATTR_INDEX_SYSTEM)
87 else if (attrnamespace == EXT4_XATTR_INDEX_USER)
89 else if (attrnamespace == EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT) {
90 *name_len = strlen(POSIX1E_ACL_DEFAULT_EXTATTR_NAME);
91 return (POSIX1E_ACL_DEFAULT_EXTATTR_NAME);
92 } else if (attrnamespace == EXT4_XATTR_INDEX_POSIX_ACL_ACCESS) {
93 *name_len = strlen(POSIX1E_ACL_ACCESS_EXTATTR_NAME);
94 return (POSIX1E_ACL_ACCESS_EXTATTR_NAME);
98 * XXX: Not all linux namespaces are mapped to bsd for now,
99 * return NULL, which will be converted to ENOTSUP on upper layer.
101 SDT_PROBE2(ext2fs, , trace, extattr, 1,
102 "can not convert ext2fs name to bsd namespace");
108 ext2_extattr_attrnamespace_to_linux(int attrnamespace, const char *name)
111 if (attrnamespace == POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE &&
112 !strcmp(name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME))
113 return (EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT);
115 if (attrnamespace == POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE &&
116 !strcmp(name, POSIX1E_ACL_ACCESS_EXTATTR_NAME))
117 return (EXT4_XATTR_INDEX_POSIX_ACL_ACCESS);
119 switch (attrnamespace) {
120 case EXTATTR_NAMESPACE_SYSTEM:
121 return (EXT4_XATTR_INDEX_SYSTEM);
123 case EXTATTR_NAMESPACE_USER:
124 return (EXT4_XATTR_INDEX_USER);
128 * In this case namespace conversion should be unique,
129 * so this point is unreachable.
135 ext2_extattr_name_to_linux(int attrnamespace, const char *name)
138 if (attrnamespace == POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE ||
139 attrnamespace == POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE)
146 ext2_extattr_valid_attrname(int attrnamespace, const char *attrname)
148 if (attrnamespace == EXTATTR_NAMESPACE_EMPTY)
151 if (strlen(attrname) == 0)
154 if (strlen(attrname) + 1 > EXT2_EXTATTR_NAMELEN_MAX)
155 return (ENAMETOOLONG);
161 ext2_extattr_check(struct ext2fs_extattr_entry *entry, char *end)
163 struct ext2fs_extattr_entry *next;
165 while (!EXT2_IS_LAST_ENTRY(entry)) {
166 next = EXT2_EXTATTR_NEXT(entry);
167 if ((char *)next >= end)
177 ext2_extattr_block_check(struct inode *ip, struct buf *bp)
179 struct ext2fs_extattr_header *header;
182 header = (struct ext2fs_extattr_header *)bp->b_data;
184 error = ext2_extattr_check(EXT2_IFIRST(header),
185 bp->b_data + bp->b_bufsize);
189 return (ext2_extattr_blk_csum_verify(ip, bp));
193 ext2_extattr_inode_list(struct inode *ip, int attrnamespace,
194 struct uio *uio, size_t *size)
198 struct ext2fs_extattr_dinode_header *header;
199 struct ext2fs_extattr_entry *entry;
200 const char *attr_name;
206 if ((error = bread(ip->i_devvp,
207 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
208 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
213 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
214 ((char *)bp->b_data +
215 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
217 /* Check attributes magic value */
218 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
219 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
221 if (header->h_magic != EXTATTR_MAGIC) {
226 error = ext2_extattr_check(EXT2_IFIRST(header),
227 (char *)dinode + EXT2_INODE_SIZE(fs));
233 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
234 entry = EXT2_EXTATTR_NEXT(entry)) {
235 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
239 name_len = entry->e_name_len;
240 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
241 entry->e_name, &name_len);
248 *size += name_len + 1;
251 char *name = malloc(name_len + 1, M_TEMP, M_WAITOK);
253 memcpy(&name[1], attr_name, name_len);
254 error = uiomove(name, name_len + 1, uio);
267 ext2_extattr_block_list(struct inode *ip, int attrnamespace,
268 struct uio *uio, size_t *size)
272 struct ext2fs_extattr_header *header;
273 struct ext2fs_extattr_entry *entry;
274 const char *attr_name;
280 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
281 fs->e2fs_bsize, NOCRED, &bp);
287 /* Check attributes magic value */
288 header = EXT2_HDR(bp);
289 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
294 error = ext2_extattr_block_check(ip, bp);
300 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
301 entry = EXT2_EXTATTR_NEXT(entry)) {
302 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
306 name_len = entry->e_name_len;
307 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
308 entry->e_name, &name_len);
315 *size += name_len + 1;
318 char *name = malloc(name_len + 1, M_TEMP, M_WAITOK);
320 memcpy(&name[1], attr_name, name_len);
321 error = uiomove(name, name_len + 1, uio);
334 ext2_extattr_inode_get(struct inode *ip, int attrnamespace,
335 const char *name, struct uio *uio, size_t *size)
339 struct ext2fs_extattr_dinode_header *header;
340 struct ext2fs_extattr_entry *entry;
341 const char *attr_name;
347 if ((error = bread(ip->i_devvp,
348 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
349 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
354 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
355 ((char *)bp->b_data +
356 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
358 /* Check attributes magic value */
359 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
360 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
362 if (header->h_magic != EXTATTR_MAGIC) {
367 error = ext2_extattr_check(EXT2_IFIRST(header),
368 (char *)dinode + EXT2_INODE_SIZE(fs));
374 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
375 entry = EXT2_EXTATTR_NEXT(entry)) {
376 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
380 name_len = entry->e_name_len;
381 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
382 entry->e_name, &name_len);
388 if (strlen(name) == name_len &&
389 0 == strncmp(attr_name, name, name_len)) {
391 *size += entry->e_value_size;
394 error = uiomove(((char *)EXT2_IFIRST(header)) +
395 entry->e_value_offs, entry->e_value_size, uio);
408 ext2_extattr_block_get(struct inode *ip, int attrnamespace,
409 const char *name, struct uio *uio, size_t *size)
413 struct ext2fs_extattr_header *header;
414 struct ext2fs_extattr_entry *entry;
415 const char *attr_name;
421 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
422 fs->e2fs_bsize, NOCRED, &bp);
428 /* Check attributes magic value */
429 header = EXT2_HDR(bp);
430 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
435 error = ext2_extattr_block_check(ip, bp);
441 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
442 entry = EXT2_EXTATTR_NEXT(entry)) {
443 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
447 name_len = entry->e_name_len;
448 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
449 entry->e_name, &name_len);
455 if (strlen(name) == name_len &&
456 0 == strncmp(attr_name, name, name_len)) {
458 *size += entry->e_value_size;
461 error = uiomove(bp->b_data + entry->e_value_offs,
462 entry->e_value_size, uio);
475 ext2_extattr_delete_value(char *off,
476 struct ext2fs_extattr_entry *first_entry,
477 struct ext2fs_extattr_entry *entry, char *end)
480 struct ext2fs_extattr_entry *next;
482 min_offs = end - off;
484 while (!EXT2_IS_LAST_ENTRY(next)) {
485 if (min_offs > next->e_value_offs && next->e_value_offs > 0)
486 min_offs = next->e_value_offs;
488 next = EXT2_EXTATTR_NEXT(next);
491 if (entry->e_value_size == 0)
494 memmove(off + min_offs + EXT2_EXTATTR_SIZE(entry->e_value_size),
495 off + min_offs, entry->e_value_offs - min_offs);
497 /* Adjust all value offsets */
499 while (!EXT2_IS_LAST_ENTRY(next))
501 if (next->e_value_offs > 0 &&
502 next->e_value_offs < entry->e_value_offs)
503 next->e_value_offs +=
504 EXT2_EXTATTR_SIZE(entry->e_value_size);
506 next = EXT2_EXTATTR_NEXT(next);
509 min_offs += EXT2_EXTATTR_SIZE(entry->e_value_size);
515 ext2_extattr_delete_entry(char *off,
516 struct ext2fs_extattr_entry *first_entry,
517 struct ext2fs_extattr_entry *entry, char *end)
520 struct ext2fs_extattr_entry *next;
522 /* Clean entry value */
523 ext2_extattr_delete_value(off, first_entry, entry, end);
525 /* Clean the entry */
527 while (!EXT2_IS_LAST_ENTRY(next))
528 next = EXT2_EXTATTR_NEXT(next);
530 pad = (char*)next + sizeof(uint32_t);
532 memmove(entry, (char *)entry + EXT2_EXTATTR_LEN(entry->e_name_len),
533 pad - ((char *)entry + EXT2_EXTATTR_LEN(entry->e_name_len)));
537 ext2_extattr_inode_delete(struct inode *ip, int attrnamespace, const char *name)
541 struct ext2fs_extattr_dinode_header *header;
542 struct ext2fs_extattr_entry *entry;
543 const char *attr_name;
549 if ((error = bread(ip->i_devvp,
550 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
551 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
556 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
557 ((char *)bp->b_data +
558 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
560 /* Check attributes magic value */
561 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
562 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
564 if (header->h_magic != EXTATTR_MAGIC) {
569 error = ext2_extattr_check(EXT2_IFIRST(header),
570 (char *)dinode + EXT2_INODE_SIZE(fs));
576 /* If I am last entry, just make magic zero */
577 entry = EXT2_IFIRST(header);
578 if ((EXT2_IS_LAST_ENTRY(EXT2_EXTATTR_NEXT(entry))) &&
579 (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) ==
582 name_len = entry->e_name_len;
583 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
584 entry->e_name, &name_len);
590 if (strlen(name) == name_len &&
591 0 == strncmp(attr_name, name, name_len)) {
592 memset(header, 0, sizeof(struct ext2fs_extattr_dinode_header));
598 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
599 entry = EXT2_EXTATTR_NEXT(entry)) {
600 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
604 name_len = entry->e_name_len;
605 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
606 entry->e_name, &name_len);
612 if (strlen(name) == name_len &&
613 0 == strncmp(attr_name, name, name_len)) {
614 ext2_extattr_delete_entry((char *)EXT2_IFIRST(header),
615 EXT2_IFIRST(header), entry,
616 (char *)dinode + EXT2_INODE_SIZE(fs));
628 ext2_extattr_block_clone(struct inode *ip, struct buf **bpp)
633 struct ext2fs_extattr_header *header;
639 header = EXT2_HDR(sbp);
640 if (header->h_magic != EXTATTR_MAGIC || header->h_refcount == 1)
643 facl = ext2_alloc_meta(ip);
647 cbp = getblk(ip->i_devvp, fsbtodb(fs, facl), fs->e2fs_bsize, 0, 0, 0);
649 ext2_blkfree(ip, facl, fs->e2fs_bsize);
653 memcpy(cbp->b_data, sbp->b_data, fs->e2fs_bsize);
654 header->h_refcount--;
658 ext2_update(ip->i_vnode, 1);
660 header = EXT2_HDR(cbp);
661 header->h_refcount = 1;
669 ext2_extattr_block_delete(struct inode *ip, int attrnamespace, const char *name)
673 struct ext2fs_extattr_header *header;
674 struct ext2fs_extattr_entry *entry;
675 const char *attr_name;
681 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
682 fs->e2fs_bsize, NOCRED, &bp);
688 /* Check attributes magic value */
689 header = EXT2_HDR(bp);
690 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
695 error = ext2_extattr_block_check(ip, bp);
701 if (header->h_refcount > 1) {
702 error = ext2_extattr_block_clone(ip, &bp);
709 /* If I am last entry, clean me and free the block */
710 entry = EXT2_FIRST_ENTRY(bp);
711 if (EXT2_IS_LAST_ENTRY(EXT2_EXTATTR_NEXT(entry)) &&
712 (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) ==
715 name_len = entry->e_name_len;
716 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
717 entry->e_name, &name_len);
723 if (strlen(name) == name_len &&
724 0 == strncmp(attr_name, name, name_len)) {
725 ip->i_blocks -= btodb(fs->e2fs_bsize);
726 ext2_blkfree(ip, ip->i_facl, fs->e2fs_bsize);
728 error = ext2_update(ip->i_vnode, 1);
735 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
736 entry = EXT2_EXTATTR_NEXT(entry)) {
737 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
741 name_len = entry->e_name_len;
742 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
743 entry->e_name, &name_len);
749 if (strlen(name) == name_len &&
750 0 == strncmp(attr_name, name, name_len)) {
751 ext2_extattr_delete_entry(bp->b_data,
752 EXT2_FIRST_ENTRY(bp), entry,
753 bp->b_data + bp->b_bufsize);
764 static struct ext2fs_extattr_entry *
765 allocate_entry(const char *name, int attrnamespace, uint16_t offs,
766 uint32_t size, uint32_t hash)
768 const char *attr_name;
770 struct ext2fs_extattr_entry *entry;
772 attr_name = ext2_extattr_name_to_linux(attrnamespace, name);
773 name_len = strlen(attr_name);
775 entry = malloc(sizeof(struct ext2fs_extattr_entry) + name_len,
778 entry->e_name_len = name_len;
779 entry->e_name_index = ext2_extattr_attrnamespace_to_linux(attrnamespace, name);
780 entry->e_value_offs = offs;
781 entry->e_value_block = 0;
782 entry->e_value_size = size;
783 entry->e_hash = hash;
784 memcpy(entry->e_name, name, name_len);
790 free_entry(struct ext2fs_extattr_entry *entry)
797 ext2_extattr_get_size(struct ext2fs_extattr_entry *first_entry,
798 struct ext2fs_extattr_entry *exist_entry, int header_size,
799 int name_len, int new_size)
801 struct ext2fs_extattr_entry *entry;
805 size += sizeof(uint32_t);
807 if (NULL == exist_entry) {
808 size += EXT2_EXTATTR_LEN(name_len);
809 size += EXT2_EXTATTR_SIZE(new_size);
813 for (entry = first_entry; !EXT2_IS_LAST_ENTRY(entry);
814 entry = EXT2_EXTATTR_NEXT(entry)) {
815 if (entry != exist_entry)
816 size += EXT2_EXTATTR_LEN(entry->e_name_len) +
817 EXT2_EXTATTR_SIZE(entry->e_value_size);
819 size += EXT2_EXTATTR_LEN(entry->e_name_len) +
820 EXT2_EXTATTR_SIZE(new_size);
827 ext2_extattr_set_exist_entry(char *off,
828 struct ext2fs_extattr_entry *first_entry,
829 struct ext2fs_extattr_entry *entry,
830 char *end, struct uio *uio)
834 min_offs = ext2_extattr_delete_value(off, first_entry, entry, end);
836 entry->e_value_size = uio->uio_resid;
837 if (entry->e_value_size)
838 entry->e_value_offs = min_offs -
839 EXT2_EXTATTR_SIZE(uio->uio_resid);
841 entry->e_value_offs = 0;
843 uiomove(off + entry->e_value_offs, entry->e_value_size, uio);
846 static struct ext2fs_extattr_entry *
847 ext2_extattr_set_new_entry(char *off, struct ext2fs_extattr_entry *first_entry,
848 const char *name, int attrnamespace, char *end, struct uio *uio)
853 struct ext2fs_extattr_entry *entry;
854 struct ext2fs_extattr_entry *new_entry;
857 min_offs = end - off;
859 while (!EXT2_IS_LAST_ENTRY(entry)) {
860 if (min_offs > entry->e_value_offs && entry->e_value_offs > 0)
861 min_offs = entry->e_value_offs;
863 entry = EXT2_EXTATTR_NEXT(entry);
866 pad = (char*)entry + sizeof(uint32_t);
868 /* Find entry insert position */
869 name_len = strlen(name);
871 while (!EXT2_IS_LAST_ENTRY(entry)) {
872 if (!(attrnamespace - entry->e_name_index) &&
873 !(name_len - entry->e_name_len))
874 if (memcmp(name, entry->e_name, name_len) <= 0)
877 entry = EXT2_EXTATTR_NEXT(entry);
880 /* Create new entry and insert it */
881 new_entry = allocate_entry(name, attrnamespace, 0, uio->uio_resid, 0);
882 memmove((char *)entry + EXT2_EXTATTR_LEN(new_entry->e_name_len), entry,
885 memcpy(entry, new_entry, EXT2_EXTATTR_LEN(new_entry->e_name_len));
886 free_entry(new_entry);
889 if (new_entry->e_value_size > 0)
890 new_entry->e_value_offs = min_offs -
891 EXT2_EXTATTR_SIZE(new_entry->e_value_size);
893 uiomove(off + new_entry->e_value_offs, new_entry->e_value_size, uio);
899 ext2_extattr_inode_set(struct inode *ip, int attrnamespace,
900 const char *name, struct uio *uio)
904 struct ext2fs_extattr_dinode_header *header;
905 struct ext2fs_extattr_entry *entry;
906 const char *attr_name;
908 size_t size = 0, max_size;
913 if ((error = bread(ip->i_devvp,
914 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
915 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
920 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
921 ((char *)bp->b_data +
922 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
924 /* Check attributes magic value */
925 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
926 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
928 if (header->h_magic != EXTATTR_MAGIC) {
933 error = ext2_extattr_check(EXT2_IFIRST(header), (char *)dinode +
934 EXT2_INODE_SIZE(fs));
940 /* Find if entry exist */
941 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
942 entry = EXT2_EXTATTR_NEXT(entry)) {
943 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
947 name_len = entry->e_name_len;
948 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
949 entry->e_name, &name_len);
955 if (strlen(name) == name_len &&
956 0 == strncmp(attr_name, name, name_len))
960 max_size = EXT2_INODE_SIZE(fs) - E2FS_REV0_INODE_SIZE -
961 dinode->e2di_extra_isize;
963 if (!EXT2_IS_LAST_ENTRY(entry)) {
964 size = ext2_extattr_get_size(EXT2_IFIRST(header), entry,
965 sizeof(struct ext2fs_extattr_dinode_header),
966 entry->e_name_len, uio->uio_resid);
967 if (size > max_size) {
972 ext2_extattr_set_exist_entry((char *)EXT2_IFIRST(header),
973 EXT2_IFIRST(header), entry, (char *)header + max_size, uio);
975 /* Ensure that the same entry does not exist in the block */
977 error = ext2_extattr_block_get(ip, attrnamespace, name,
979 if (error != ENOATTR || size > 0) {
988 size = ext2_extattr_get_size(EXT2_IFIRST(header), NULL,
989 sizeof(struct ext2fs_extattr_dinode_header),
990 entry->e_name_len, uio->uio_resid);
991 if (size > max_size) {
996 ext2_extattr_set_new_entry((char *)EXT2_IFIRST(header),
997 EXT2_IFIRST(header), name, attrnamespace,
998 (char *)header + max_size, uio);
1001 return (bwrite(bp));
1005 ext2_extattr_hash_entry(struct ext2fs_extattr_header *header,
1006 struct ext2fs_extattr_entry *entry)
1009 char *name = entry->e_name;
1012 for (n=0; n < entry->e_name_len; n++) {
1013 hash = (hash << EXT2_EXTATTR_NAME_HASH_SHIFT) ^
1014 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_NAME_HASH_SHIFT)) ^
1018 if (entry->e_value_block == 0 && entry->e_value_size != 0) {
1019 uint32_t *value = (uint32_t *)((char *)header + entry->e_value_offs);
1020 for (n = (entry->e_value_size +
1021 EXT2_EXTATTR_ROUND) >> EXT2_EXTATTR_PAD_BITS; n; n--) {
1022 hash = (hash << EXT2_EXTATTR_VALUE_HASH_SHIFT) ^
1023 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_VALUE_HASH_SHIFT)) ^
1028 entry->e_hash = hash;
1032 ext2_extattr_rehash(struct ext2fs_extattr_header *header,
1033 struct ext2fs_extattr_entry *entry)
1035 struct ext2fs_extattr_entry *here;
1038 ext2_extattr_hash_entry(header, entry);
1040 here = EXT2_ENTRY(header+1);
1041 while (!EXT2_IS_LAST_ENTRY(here)) {
1042 if (!here->e_hash) {
1043 /* Block is not shared if an entry's hash value == 0 */
1048 hash = (hash << EXT2_EXTATTR_BLOCK_HASH_SHIFT) ^
1049 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_BLOCK_HASH_SHIFT)) ^
1052 here = EXT2_EXTATTR_NEXT(here);
1055 header->h_hash = hash;
1059 ext2_extattr_block_set(struct inode *ip, int attrnamespace,
1060 const char *name, struct uio *uio)
1062 struct m_ext2fs *fs;
1064 struct ext2fs_extattr_header *header;
1065 struct ext2fs_extattr_entry *entry;
1066 const char *attr_name;
1074 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
1075 fs->e2fs_bsize, NOCRED, &bp);
1081 /* Check attributes magic value */
1082 header = EXT2_HDR(bp);
1083 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
1088 error = ext2_extattr_block_check(ip, bp);
1094 if (header->h_refcount > 1) {
1095 error = ext2_extattr_block_clone(ip, &bp);
1101 header = EXT2_HDR(bp);
1104 /* Find if entry exist */
1105 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
1106 entry = EXT2_EXTATTR_NEXT(entry)) {
1107 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
1111 name_len = entry->e_name_len;
1112 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
1113 entry->e_name, &name_len);
1119 if (strlen(name) == name_len &&
1120 0 == strncmp(attr_name, name, name_len))
1124 if (!EXT2_IS_LAST_ENTRY(entry)) {
1125 size = ext2_extattr_get_size(EXT2_FIRST_ENTRY(bp), entry,
1126 sizeof(struct ext2fs_extattr_header),
1127 entry->e_name_len, uio->uio_resid);
1128 if (size > bp->b_bufsize) {
1133 ext2_extattr_set_exist_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1134 entry, bp->b_data + bp->b_bufsize, uio);
1136 size = ext2_extattr_get_size(EXT2_FIRST_ENTRY(bp), NULL,
1137 sizeof(struct ext2fs_extattr_header),
1138 strlen(name), uio->uio_resid);
1139 if (size > bp->b_bufsize) {
1144 entry = ext2_extattr_set_new_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1145 name, attrnamespace, bp->b_data + bp->b_bufsize, uio);
1147 /* Clean the same entry in the inode */
1148 error = ext2_extattr_inode_delete(ip, attrnamespace, name);
1149 if (error && error != ENOATTR) {
1155 ext2_extattr_rehash(header, entry);
1156 ext2_extattr_blk_csum_set(ip, bp);
1158 return (bwrite(bp));
1161 size = ext2_extattr_get_size(NULL, NULL,
1162 sizeof(struct ext2fs_extattr_header),
1163 strlen(ext2_extattr_name_to_linux(attrnamespace, name)), uio->uio_resid);
1164 if (size > fs->e2fs_bsize)
1167 /* Allocate block, fill EA header and insert entry */
1168 ip->i_facl = ext2_alloc_meta(ip);
1169 if (0 == ip->i_facl)
1172 ip->i_blocks += btodb(fs->e2fs_bsize);
1173 ext2_update(ip->i_vnode, 1);
1175 bp = getblk(ip->i_devvp, fsbtodb(fs, ip->i_facl), fs->e2fs_bsize, 0, 0, 0);
1177 ext2_blkfree(ip, ip->i_facl, fs->e2fs_bsize);
1178 ip->i_blocks -= btodb(fs->e2fs_bsize);
1180 ext2_update(ip->i_vnode, 1);
1184 header = EXT2_HDR(bp);
1185 header->h_magic = EXTATTR_MAGIC;
1186 header->h_refcount = 1;
1187 header->h_blocks = 1;
1189 memset(header->h_reserved, 0, sizeof(header->h_reserved));
1190 memcpy(bp->b_data, header, sizeof(struct ext2fs_extattr_header));
1191 memset(EXT2_FIRST_ENTRY(bp), 0, sizeof(uint32_t));
1193 entry = ext2_extattr_set_new_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1194 name, attrnamespace, bp->b_data + bp->b_bufsize, uio);
1196 /* Clean the same entry in the inode */
1197 error = ext2_extattr_inode_delete(ip, attrnamespace, name);
1198 if (error && error != ENOATTR) {
1203 ext2_extattr_rehash(header, entry);
1204 ext2_extattr_blk_csum_set(ip, bp);
1206 return (bwrite(bp));
1209 int ext2_extattr_free(struct inode *ip)
1211 struct m_ext2fs *fs;
1213 struct ext2fs_extattr_header *header;
1221 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
1222 fs->e2fs_bsize, NOCRED, &bp);
1228 /* Check attributes magic value */
1229 header = EXT2_HDR(bp);
1230 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
1235 error = ext2_extattr_check(EXT2_FIRST_ENTRY(bp),
1236 bp->b_data + bp->b_bufsize);
1242 if (header->h_refcount > 1) {
1243 header->h_refcount--;
1246 ext2_blkfree(ip, ip->i_facl, ip->i_e2fs->e2fs_bsize);
1250 ip->i_blocks -= btodb(ip->i_e2fs->e2fs_bsize);
1252 ext2_update(ip->i_vnode, 1);