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>
43 #include <fs/ext2fs/fs.h>
44 #include <fs/ext2fs/ext2fs.h>
45 #include <fs/ext2fs/inode.h>
46 #include <fs/ext2fs/ext2_dinode.h>
47 #include <fs/ext2fs/ext2_mount.h>
48 #include <fs/ext2fs/ext2_extattr.h>
49 #include <fs/ext2fs/ext2_extern.h>
52 ext2_extattr_attrnamespace_to_bsd(int attrnamespace)
55 switch (attrnamespace) {
56 case EXT4_XATTR_INDEX_SYSTEM:
57 return (EXTATTR_NAMESPACE_SYSTEM);
59 case EXT4_XATTR_INDEX_USER:
60 return (EXTATTR_NAMESPACE_USER);
62 case EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT:
63 return (POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE);
65 case EXT4_XATTR_INDEX_POSIX_ACL_ACCESS:
66 return (POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE);
69 return (EXTATTR_NAMESPACE_EMPTY);
73 ext2_extattr_name_to_bsd(int attrnamespace, const char *name, int* name_len)
76 if (attrnamespace == EXT4_XATTR_INDEX_SYSTEM)
78 else if (attrnamespace == EXT4_XATTR_INDEX_USER)
80 else if (attrnamespace == EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT) {
81 *name_len = strlen(POSIX1E_ACL_DEFAULT_EXTATTR_NAME);
82 return (POSIX1E_ACL_DEFAULT_EXTATTR_NAME);
83 } else if (attrnamespace == EXT4_XATTR_INDEX_POSIX_ACL_ACCESS) {
84 *name_len = strlen(POSIX1E_ACL_ACCESS_EXTATTR_NAME);
85 return (POSIX1E_ACL_ACCESS_EXTATTR_NAME);
89 * XXX: Not all linux namespaces are mapped to bsd for now,
90 * return NULL, which will be converted to ENOTSUP on upper layer.
93 printf("can not convert ext2fs name to bsd: namespace=%d\n", attrnamespace);
100 ext2_extattr_attrnamespace_to_linux(int attrnamespace, const char *name)
103 if (attrnamespace == POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE &&
104 !strcmp(name, POSIX1E_ACL_DEFAULT_EXTATTR_NAME))
105 return (EXT4_XATTR_INDEX_POSIX_ACL_DEFAULT);
107 if (attrnamespace == POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE &&
108 !strcmp(name, POSIX1E_ACL_ACCESS_EXTATTR_NAME))
109 return (EXT4_XATTR_INDEX_POSIX_ACL_ACCESS);
111 switch (attrnamespace) {
112 case EXTATTR_NAMESPACE_SYSTEM:
113 return (EXT4_XATTR_INDEX_SYSTEM);
115 case EXTATTR_NAMESPACE_USER:
116 return (EXT4_XATTR_INDEX_USER);
120 * In this case namespace conversion should be unique,
121 * so this point is unreachable.
127 ext2_extattr_name_to_linux(int attrnamespace, const char *name)
130 if (attrnamespace == POSIX1E_ACL_DEFAULT_EXTATTR_NAMESPACE ||
131 attrnamespace == POSIX1E_ACL_ACCESS_EXTATTR_NAMESPACE)
138 ext2_extattr_valid_attrname(int attrnamespace, const char *attrname)
140 if (attrnamespace == EXTATTR_NAMESPACE_EMPTY)
143 if (strlen(attrname) == 0)
146 if (strlen(attrname) + 1 > EXT2_EXTATTR_NAMELEN_MAX)
147 return (ENAMETOOLONG);
153 ext2_extattr_check(struct ext2fs_extattr_entry *entry, char *end)
155 struct ext2fs_extattr_entry *next;
157 while (!EXT2_IS_LAST_ENTRY(entry)) {
158 next = EXT2_EXTATTR_NEXT(entry);
159 if ((char *)next >= end)
169 ext2_extattr_inode_list(struct inode *ip, int attrnamespace,
170 struct uio *uio, size_t *size)
174 struct ext2fs_extattr_dinode_header *header;
175 struct ext2fs_extattr_entry *entry;
176 const char *attr_name;
182 if ((error = bread(ip->i_devvp,
183 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
184 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
189 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
190 ((char *)bp->b_data +
191 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
193 /* Check attributes magic value */
194 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
195 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
197 if (header->h_magic != EXTATTR_MAGIC) {
202 error = ext2_extattr_check(EXT2_IFIRST(header),
203 (char *)dinode + EXT2_INODE_SIZE(fs));
209 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
210 entry = EXT2_EXTATTR_NEXT(entry)) {
211 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
215 name_len = entry->e_name_len;
216 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
217 entry->e_name, &name_len);
224 *size += name_len + 1;
226 char *name = malloc(name_len + 1, M_TEMP, M_WAITOK);
228 memcpy(&name[1], attr_name, name_len);
229 error = uiomove(name, name_len + 1, uio);
242 ext2_extattr_block_list(struct inode *ip, int attrnamespace,
243 struct uio *uio, size_t *size)
247 struct ext2fs_extattr_header *header;
248 struct ext2fs_extattr_entry *entry;
249 const char *attr_name;
255 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
256 fs->e2fs_bsize, NOCRED, &bp);
262 /* Check attributes magic value */
263 header = EXT2_HDR(bp);
264 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
269 error = ext2_extattr_check(EXT2_FIRST_ENTRY(bp), bp->b_data + bp->b_bufsize);
275 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
276 entry = EXT2_EXTATTR_NEXT(entry)) {
277 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
281 name_len = entry->e_name_len;
282 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
283 entry->e_name, &name_len);
290 *size += name_len + 1;
292 char *name = malloc(name_len + 1, M_TEMP, M_WAITOK);
294 memcpy(&name[1], attr_name, name_len);
295 error = uiomove(name, name_len + 1, uio);
308 ext2_extattr_inode_get(struct inode *ip, int attrnamespace,
309 const char *name, struct uio *uio, size_t *size)
313 struct ext2fs_extattr_dinode_header *header;
314 struct ext2fs_extattr_entry *entry;
315 const char *attr_name;
321 if ((error = bread(ip->i_devvp,
322 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
323 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
328 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
329 ((char *)bp->b_data +
330 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
332 /* Check attributes magic value */
333 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
334 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
336 if (header->h_magic != EXTATTR_MAGIC) {
341 error = ext2_extattr_check(EXT2_IFIRST(header),
342 (char *)dinode + EXT2_INODE_SIZE(fs));
348 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
349 entry = EXT2_EXTATTR_NEXT(entry)) {
350 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
354 name_len = entry->e_name_len;
355 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
356 entry->e_name, &name_len);
362 if (strlen(name) == name_len &&
363 0 == strncmp(attr_name, name, name_len)) {
365 *size += entry->e_value_size;
367 error = uiomove(((char *)EXT2_IFIRST(header)) +
368 entry->e_value_offs, entry->e_value_size, uio);
382 ext2_extattr_block_get(struct inode *ip, int attrnamespace,
383 const char *name, struct uio *uio, size_t *size)
387 struct ext2fs_extattr_header *header;
388 struct ext2fs_extattr_entry *entry;
389 const char *attr_name;
395 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
396 fs->e2fs_bsize, NOCRED, &bp);
402 /* Check attributes magic value */
403 header = EXT2_HDR(bp);
404 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
409 error = ext2_extattr_check(EXT2_FIRST_ENTRY(bp), bp->b_data + bp->b_bufsize);
415 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
416 entry = EXT2_EXTATTR_NEXT(entry)) {
417 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
421 name_len = entry->e_name_len;
422 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
423 entry->e_name, &name_len);
429 if (strlen(name) == name_len &&
430 0 == strncmp(attr_name, name, name_len)) {
432 *size += entry->e_value_size;
434 error = uiomove(bp->b_data + entry->e_value_offs,
435 entry->e_value_size, uio);
449 ext2_extattr_delete_value(char *off,
450 struct ext2fs_extattr_entry *first_entry,
451 struct ext2fs_extattr_entry *entry, char *end)
454 struct ext2fs_extattr_entry *next;
456 min_offs = end - off;
458 while (!EXT2_IS_LAST_ENTRY(next)) {
459 if (min_offs > next->e_value_offs && next->e_value_offs > 0)
460 min_offs = next->e_value_offs;
462 next = EXT2_EXTATTR_NEXT(next);
465 if (entry->e_value_size == 0)
468 memmove(off + min_offs + EXT2_EXTATTR_SIZE(entry->e_value_size),
469 off + min_offs, entry->e_value_offs - min_offs);
471 /* Adjust all value offsets */
473 while (!EXT2_IS_LAST_ENTRY(next))
475 if (next->e_value_offs > 0 &&
476 next->e_value_offs < entry->e_value_offs)
477 next->e_value_offs +=
478 EXT2_EXTATTR_SIZE(entry->e_value_size);
480 next = EXT2_EXTATTR_NEXT(next);
483 min_offs += EXT2_EXTATTR_SIZE(entry->e_value_size);
489 ext2_extattr_delete_entry(char *off,
490 struct ext2fs_extattr_entry *first_entry,
491 struct ext2fs_extattr_entry *entry, char *end)
494 struct ext2fs_extattr_entry *next;
496 /* Clean entry value */
497 ext2_extattr_delete_value(off, first_entry, entry, end);
499 /* Clean the entry */
501 while (!EXT2_IS_LAST_ENTRY(next))
502 next = EXT2_EXTATTR_NEXT(next);
504 pad = (char*)next + sizeof(uint32_t);
506 memmove(entry, (char *)entry + EXT2_EXTATTR_LEN(entry->e_name_len),
507 pad - ((char *)entry + EXT2_EXTATTR_LEN(entry->e_name_len)));
511 ext2_extattr_inode_delete(struct inode *ip, int attrnamespace, const char *name)
515 struct ext2fs_extattr_dinode_header *header;
516 struct ext2fs_extattr_entry *entry;
517 const char *attr_name;
523 if ((error = bread(ip->i_devvp,
524 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
525 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
530 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
531 ((char *)bp->b_data +
532 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
534 /* Check attributes magic value */
535 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
536 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
538 if (header->h_magic != EXTATTR_MAGIC) {
543 error = ext2_extattr_check(EXT2_IFIRST(header),
544 (char *)dinode + EXT2_INODE_SIZE(fs));
550 /* If I am last entry, just make magic zero */
551 entry = EXT2_IFIRST(header);
552 if ((EXT2_IS_LAST_ENTRY(EXT2_EXTATTR_NEXT(entry))) &&
553 (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) ==
556 name_len = entry->e_name_len;
557 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
558 entry->e_name, &name_len);
564 if (strlen(name) == name_len &&
565 0 == strncmp(attr_name, name, name_len)) {
566 memset(header, 0, sizeof(struct ext2fs_extattr_dinode_header));
572 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
573 entry = EXT2_EXTATTR_NEXT(entry)) {
574 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
578 name_len = entry->e_name_len;
579 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
580 entry->e_name, &name_len);
586 if (strlen(name) == name_len &&
587 0 == strncmp(attr_name, name, name_len)) {
588 ext2_extattr_delete_entry((char *)EXT2_IFIRST(header),
589 EXT2_IFIRST(header), entry,
590 (char *)dinode + EXT2_INODE_SIZE(fs));
602 ext2_extattr_block_clone(struct inode *ip, struct buf **bpp)
607 struct ext2fs_extattr_header *header;
613 header = EXT2_HDR(sbp);
614 if (header->h_magic != EXTATTR_MAGIC || header->h_refcount == 1)
617 facl = ext2_alloc_meta(ip);
621 cbp = getblk(ip->i_devvp, fsbtodb(fs, facl), fs->e2fs_bsize, 0, 0, 0);
623 ext2_blkfree(ip, facl, fs->e2fs_bsize);
627 memcpy(cbp->b_data, sbp->b_data, fs->e2fs_bsize);
628 header->h_refcount--;
632 ext2_update(ip->i_vnode, 1);
634 header = EXT2_HDR(cbp);
635 header->h_refcount = 1;
643 ext2_extattr_block_delete(struct inode *ip, int attrnamespace, const char *name)
647 struct ext2fs_extattr_header *header;
648 struct ext2fs_extattr_entry *entry;
649 const char *attr_name;
655 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
656 fs->e2fs_bsize, NOCRED, &bp);
662 /* Check attributes magic value */
663 header = EXT2_HDR(bp);
664 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
669 error = ext2_extattr_check(EXT2_FIRST_ENTRY(bp), bp->b_data + bp->b_bufsize);
675 if (header->h_refcount > 1) {
676 error = ext2_extattr_block_clone(ip, &bp);
683 /* If I am last entry, clean me and free the block */
684 entry = EXT2_FIRST_ENTRY(bp);
685 if (EXT2_IS_LAST_ENTRY(EXT2_EXTATTR_NEXT(entry)) &&
686 (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) ==
689 name_len = entry->e_name_len;
690 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
691 entry->e_name, &name_len);
697 if (strlen(name) == name_len &&
698 0 == strncmp(attr_name, name, name_len)) {
699 ip->i_blocks -= btodb(fs->e2fs_bsize);
700 ext2_blkfree(ip, ip->i_facl, fs->e2fs_bsize);
702 error = ext2_update(ip->i_vnode, 1);
709 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
710 entry = EXT2_EXTATTR_NEXT(entry)) {
711 if (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 ext2_extattr_delete_entry(bp->b_data,
726 EXT2_FIRST_ENTRY(bp), entry,
727 bp->b_data + bp->b_bufsize);
738 static struct ext2fs_extattr_entry *
739 allocate_entry(const char *name, int attrnamespace, uint16_t offs,
740 uint32_t size, uint32_t hash)
742 const char *attr_name;
744 struct ext2fs_extattr_entry *entry;
746 attr_name = ext2_extattr_name_to_linux(attrnamespace, name);
747 name_len = strlen(attr_name);
749 entry = malloc(sizeof(struct ext2fs_extattr_entry) + name_len,
752 entry->e_name_len = name_len;
753 entry->e_name_index = ext2_extattr_attrnamespace_to_linux(attrnamespace, name);
754 entry->e_value_offs = offs;
755 entry->e_value_block = 0;
756 entry->e_value_size = size;
757 entry->e_hash = hash;
758 memcpy(entry->e_name, name, name_len);
764 free_entry(struct ext2fs_extattr_entry *entry)
771 ext2_extattr_get_size(struct ext2fs_extattr_entry *first_entry,
772 struct ext2fs_extattr_entry *exist_entry, int header_size,
773 int name_len, int new_size)
775 struct ext2fs_extattr_entry *entry;
779 size += sizeof(uint32_t);
781 if (NULL == exist_entry) {
782 size += EXT2_EXTATTR_LEN(name_len);
783 size += EXT2_EXTATTR_SIZE(new_size);
787 for (entry = first_entry; !EXT2_IS_LAST_ENTRY(entry);
788 entry = EXT2_EXTATTR_NEXT(entry)) {
789 if (entry != exist_entry)
790 size += EXT2_EXTATTR_LEN(entry->e_name_len) +
791 EXT2_EXTATTR_SIZE(entry->e_value_size);
793 size += EXT2_EXTATTR_LEN(entry->e_name_len) +
794 EXT2_EXTATTR_SIZE(new_size);
801 ext2_extattr_set_exist_entry(char *off,
802 struct ext2fs_extattr_entry *first_entry,
803 struct ext2fs_extattr_entry *entry,
804 char *end, struct uio *uio)
808 min_offs = ext2_extattr_delete_value(off, first_entry, entry, end);
810 entry->e_value_size = uio->uio_resid;
811 if (entry->e_value_size)
812 entry->e_value_offs = min_offs -
813 EXT2_EXTATTR_SIZE(uio->uio_resid);
815 entry->e_value_offs = 0;
817 uiomove(off + entry->e_value_offs, entry->e_value_size, uio);
820 static struct ext2fs_extattr_entry *
821 ext2_extattr_set_new_entry(char *off, struct ext2fs_extattr_entry *first_entry,
822 const char *name, int attrnamespace, char *end, struct uio *uio)
827 struct ext2fs_extattr_entry *entry;
828 struct ext2fs_extattr_entry *new_entry;
831 min_offs = end - off;
833 while (!EXT2_IS_LAST_ENTRY(entry)) {
834 if (min_offs > entry->e_value_offs && entry->e_value_offs > 0)
835 min_offs = entry->e_value_offs;
837 entry = EXT2_EXTATTR_NEXT(entry);
840 pad = (char*)entry + sizeof(uint32_t);
842 /* Find entry insert position */
843 name_len = strlen(name);
845 while (!EXT2_IS_LAST_ENTRY(entry)) {
846 if (!(attrnamespace - entry->e_name_index) &&
847 !(name_len - entry->e_name_len))
848 if (memcmp(name, entry->e_name, name_len) <= 0)
851 entry = EXT2_EXTATTR_NEXT(entry);
854 /* Create new entry and insert it */
855 new_entry = allocate_entry(name, attrnamespace, 0, uio->uio_resid, 0);
856 memmove((char *)entry + EXT2_EXTATTR_LEN(new_entry->e_name_len), entry,
859 memcpy(entry, new_entry, EXT2_EXTATTR_LEN(new_entry->e_name_len));
860 free_entry(new_entry);
863 if (new_entry->e_value_size > 0)
864 new_entry->e_value_offs = min_offs -
865 EXT2_EXTATTR_SIZE(new_entry->e_value_size);
867 uiomove(off + new_entry->e_value_offs, new_entry->e_value_size, uio);
873 ext2_extattr_inode_set(struct inode *ip, int attrnamespace,
874 const char *name, struct uio *uio)
878 struct ext2fs_extattr_dinode_header *header;
879 struct ext2fs_extattr_entry *entry;
880 const char *attr_name;
882 size_t size = 0, max_size;
887 if ((error = bread(ip->i_devvp,
888 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
889 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
894 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
895 ((char *)bp->b_data +
896 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
898 /* Check attributes magic value */
899 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
900 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
902 if (header->h_magic != EXTATTR_MAGIC) {
907 error = ext2_extattr_check(EXT2_IFIRST(header), (char *)dinode +
908 EXT2_INODE_SIZE(fs));
914 /* Find if entry exist */
915 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
916 entry = EXT2_EXTATTR_NEXT(entry)) {
917 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
921 name_len = entry->e_name_len;
922 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
923 entry->e_name, &name_len);
929 if (strlen(name) == name_len &&
930 0 == strncmp(attr_name, name, name_len))
934 max_size = EXT2_INODE_SIZE(fs) - E2FS_REV0_INODE_SIZE -
935 dinode->e2di_extra_isize;
937 if (!EXT2_IS_LAST_ENTRY(entry)) {
938 size = ext2_extattr_get_size(EXT2_IFIRST(header), entry,
939 sizeof(struct ext2fs_extattr_dinode_header),
940 entry->e_name_len, uio->uio_resid);
941 if (size > max_size) {
946 ext2_extattr_set_exist_entry((char *)EXT2_IFIRST(header),
947 EXT2_IFIRST(header), entry, (char *)header + max_size, uio);
949 /* Ensure that the same entry does not exist in the block */
951 error = ext2_extattr_block_get(ip, attrnamespace, name,
953 if (error != ENOATTR || size > 0) {
962 size = ext2_extattr_get_size(EXT2_IFIRST(header), NULL,
963 sizeof(struct ext2fs_extattr_dinode_header),
964 entry->e_name_len, uio->uio_resid);
965 if (size > max_size) {
970 ext2_extattr_set_new_entry((char *)EXT2_IFIRST(header),
971 EXT2_IFIRST(header), name, attrnamespace,
972 (char *)header + max_size, uio);
979 ext2_extattr_hash_entry(struct ext2fs_extattr_header *header,
980 struct ext2fs_extattr_entry *entry)
983 char *name = entry->e_name;
986 for (n=0; n < entry->e_name_len; n++) {
987 hash = (hash << EXT2_EXTATTR_NAME_HASH_SHIFT) ^
988 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_NAME_HASH_SHIFT)) ^
992 if (entry->e_value_block == 0 && entry->e_value_size != 0) {
993 uint32_t *value = (uint32_t *)((char *)header + entry->e_value_offs);
994 for (n = (entry->e_value_size +
995 EXT2_EXTATTR_ROUND) >> EXT2_EXTATTR_PAD_BITS; n; n--) {
996 hash = (hash << EXT2_EXTATTR_VALUE_HASH_SHIFT) ^
997 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_VALUE_HASH_SHIFT)) ^
1002 entry->e_hash = hash;
1006 ext2_extattr_rehash(struct ext2fs_extattr_header *header,
1007 struct ext2fs_extattr_entry *entry)
1009 struct ext2fs_extattr_entry *here;
1012 ext2_extattr_hash_entry(header, entry);
1014 here = EXT2_ENTRY(header+1);
1015 while (!EXT2_IS_LAST_ENTRY(here)) {
1016 if (!here->e_hash) {
1017 /* Block is not shared if an entry's hash value == 0 */
1022 hash = (hash << EXT2_EXTATTR_BLOCK_HASH_SHIFT) ^
1023 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_BLOCK_HASH_SHIFT)) ^
1026 here = EXT2_EXTATTR_NEXT(here);
1029 header->h_hash = hash;
1033 ext2_extattr_block_set(struct inode *ip, int attrnamespace,
1034 const char *name, struct uio *uio)
1036 struct m_ext2fs *fs;
1038 struct ext2fs_extattr_header *header;
1039 struct ext2fs_extattr_entry *entry;
1040 const char *attr_name;
1048 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
1049 fs->e2fs_bsize, NOCRED, &bp);
1055 /* Check attributes magic value */
1056 header = EXT2_HDR(bp);
1057 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
1062 error = ext2_extattr_check(EXT2_FIRST_ENTRY(bp),
1063 bp->b_data + bp->b_bufsize);
1069 if (header->h_refcount > 1) {
1070 error = ext2_extattr_block_clone(ip, &bp);
1076 header = EXT2_HDR(bp);
1079 /* Find if entry exist */
1080 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
1081 entry = EXT2_EXTATTR_NEXT(entry)) {
1082 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
1086 name_len = entry->e_name_len;
1087 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
1088 entry->e_name, &name_len);
1094 if (strlen(name) == name_len &&
1095 0 == strncmp(attr_name, name, name_len))
1099 if (!EXT2_IS_LAST_ENTRY(entry)) {
1100 size = ext2_extattr_get_size(EXT2_FIRST_ENTRY(bp), entry,
1101 sizeof(struct ext2fs_extattr_header),
1102 entry->e_name_len, uio->uio_resid);
1103 if (size > bp->b_bufsize) {
1108 ext2_extattr_set_exist_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1109 entry, bp->b_data + bp->b_bufsize, uio);
1111 size = ext2_extattr_get_size(EXT2_FIRST_ENTRY(bp), NULL,
1112 sizeof(struct ext2fs_extattr_header),
1113 strlen(name), uio->uio_resid);
1114 if (size > bp->b_bufsize) {
1119 entry = ext2_extattr_set_new_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1120 name, attrnamespace, bp->b_data + bp->b_bufsize, uio);
1122 /* Clean the same entry in the inode */
1123 error = ext2_extattr_inode_delete(ip, attrnamespace, name);
1124 if (error && error != ENOATTR) {
1130 ext2_extattr_rehash(header, entry);
1132 return (bwrite(bp));
1135 size = ext2_extattr_get_size(NULL, NULL,
1136 sizeof(struct ext2fs_extattr_header),
1137 strlen(ext2_extattr_name_to_linux(attrnamespace, name)), uio->uio_resid);
1138 if (size > fs->e2fs_bsize)
1141 /* Allocate block, fill EA header and insert entry */
1142 ip->i_facl = ext2_alloc_meta(ip);
1143 if (0 == ip->i_facl)
1146 ip->i_blocks += btodb(fs->e2fs_bsize);
1147 ext2_update(ip->i_vnode, 1);
1149 bp = getblk(ip->i_devvp, fsbtodb(fs, ip->i_facl), fs->e2fs_bsize, 0, 0, 0);
1151 ext2_blkfree(ip, ip->i_facl, fs->e2fs_bsize);
1152 ip->i_blocks -= btodb(fs->e2fs_bsize);
1154 ext2_update(ip->i_vnode, 1);
1158 header = EXT2_HDR(bp);
1159 header->h_magic = EXTATTR_MAGIC;
1160 header->h_refcount = 1;
1161 header->h_blocks = 1;
1163 memset(header->h_reserved, 0, sizeof(header->h_reserved));
1164 memcpy(bp->b_data, header, sizeof(struct ext2fs_extattr_header));
1165 memset(EXT2_FIRST_ENTRY(bp), 0, sizeof(uint32_t));
1167 entry = ext2_extattr_set_new_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1168 name, attrnamespace, bp->b_data + bp->b_bufsize, uio);
1170 /* Clean the same entry in the inode */
1171 error = ext2_extattr_inode_delete(ip, attrnamespace, name);
1172 if (error && error != ENOATTR) {
1177 ext2_extattr_rehash(header, entry);
1179 return (bwrite(bp));
1182 int ext2_extattr_free(struct inode *ip)
1184 struct m_ext2fs *fs;
1186 struct ext2fs_extattr_header *header;
1194 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
1195 fs->e2fs_bsize, NOCRED, &bp);
1201 /* Check attributes magic value */
1202 header = EXT2_HDR(bp);
1203 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
1208 error = ext2_extattr_check(EXT2_FIRST_ENTRY(bp), bp->b_data + bp->b_bufsize);
1214 if (header->h_refcount > 1) {
1215 header->h_refcount--;
1218 ext2_blkfree(ip, ip->i_facl, ip->i_e2fs->e2fs_bsize);
1222 ip->i_blocks -= btodb(ip->i_e2fs->e2fs_bsize);
1224 ext2_update(ip->i_vnode, 1);