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_block_check(struct inode *ip, struct buf *bp)
171 struct ext2fs_extattr_header *header;
174 header = (struct ext2fs_extattr_header *)bp->b_data;
176 error = ext2_extattr_check(EXT2_IFIRST(header),
177 bp->b_data + bp->b_bufsize);
181 return (ext2_extattr_blk_csum_verify(ip, bp));
185 ext2_extattr_inode_list(struct inode *ip, int attrnamespace,
186 struct uio *uio, size_t *size)
190 struct ext2fs_extattr_dinode_header *header;
191 struct ext2fs_extattr_entry *entry;
192 const char *attr_name;
198 if ((error = bread(ip->i_devvp,
199 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
200 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
205 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
206 ((char *)bp->b_data +
207 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
209 /* Check attributes magic value */
210 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
211 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
213 if (header->h_magic != EXTATTR_MAGIC) {
218 error = ext2_extattr_check(EXT2_IFIRST(header),
219 (char *)dinode + EXT2_INODE_SIZE(fs));
225 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
226 entry = EXT2_EXTATTR_NEXT(entry)) {
227 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
231 name_len = entry->e_name_len;
232 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
233 entry->e_name, &name_len);
240 *size += name_len + 1;
243 char *name = malloc(name_len + 1, M_TEMP, M_WAITOK);
245 memcpy(&name[1], attr_name, name_len);
246 error = uiomove(name, name_len + 1, uio);
259 ext2_extattr_block_list(struct inode *ip, int attrnamespace,
260 struct uio *uio, size_t *size)
264 struct ext2fs_extattr_header *header;
265 struct ext2fs_extattr_entry *entry;
266 const char *attr_name;
272 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
273 fs->e2fs_bsize, NOCRED, &bp);
279 /* Check attributes magic value */
280 header = EXT2_HDR(bp);
281 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
286 error = ext2_extattr_block_check(ip, bp);
292 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
293 entry = EXT2_EXTATTR_NEXT(entry)) {
294 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
298 name_len = entry->e_name_len;
299 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
300 entry->e_name, &name_len);
307 *size += name_len + 1;
310 char *name = malloc(name_len + 1, M_TEMP, M_WAITOK);
312 memcpy(&name[1], attr_name, name_len);
313 error = uiomove(name, name_len + 1, uio);
326 ext2_extattr_inode_get(struct inode *ip, int attrnamespace,
327 const char *name, struct uio *uio, size_t *size)
331 struct ext2fs_extattr_dinode_header *header;
332 struct ext2fs_extattr_entry *entry;
333 const char *attr_name;
339 if ((error = bread(ip->i_devvp,
340 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
341 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
346 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
347 ((char *)bp->b_data +
348 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
350 /* Check attributes magic value */
351 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
352 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
354 if (header->h_magic != EXTATTR_MAGIC) {
359 error = ext2_extattr_check(EXT2_IFIRST(header),
360 (char *)dinode + EXT2_INODE_SIZE(fs));
366 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
367 entry = EXT2_EXTATTR_NEXT(entry)) {
368 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
372 name_len = entry->e_name_len;
373 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
374 entry->e_name, &name_len);
380 if (strlen(name) == name_len &&
381 0 == strncmp(attr_name, name, name_len)) {
383 *size += entry->e_value_size;
386 error = uiomove(((char *)EXT2_IFIRST(header)) +
387 entry->e_value_offs, entry->e_value_size, uio);
400 ext2_extattr_block_get(struct inode *ip, int attrnamespace,
401 const char *name, struct uio *uio, size_t *size)
405 struct ext2fs_extattr_header *header;
406 struct ext2fs_extattr_entry *entry;
407 const char *attr_name;
413 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
414 fs->e2fs_bsize, NOCRED, &bp);
420 /* Check attributes magic value */
421 header = EXT2_HDR(bp);
422 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
427 error = ext2_extattr_block_check(ip, bp);
433 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
434 entry = EXT2_EXTATTR_NEXT(entry)) {
435 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
439 name_len = entry->e_name_len;
440 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
441 entry->e_name, &name_len);
447 if (strlen(name) == name_len &&
448 0 == strncmp(attr_name, name, name_len)) {
450 *size += entry->e_value_size;
453 error = uiomove(bp->b_data + entry->e_value_offs,
454 entry->e_value_size, uio);
467 ext2_extattr_delete_value(char *off,
468 struct ext2fs_extattr_entry *first_entry,
469 struct ext2fs_extattr_entry *entry, char *end)
472 struct ext2fs_extattr_entry *next;
474 min_offs = end - off;
476 while (!EXT2_IS_LAST_ENTRY(next)) {
477 if (min_offs > next->e_value_offs && next->e_value_offs > 0)
478 min_offs = next->e_value_offs;
480 next = EXT2_EXTATTR_NEXT(next);
483 if (entry->e_value_size == 0)
486 memmove(off + min_offs + EXT2_EXTATTR_SIZE(entry->e_value_size),
487 off + min_offs, entry->e_value_offs - min_offs);
489 /* Adjust all value offsets */
491 while (!EXT2_IS_LAST_ENTRY(next))
493 if (next->e_value_offs > 0 &&
494 next->e_value_offs < entry->e_value_offs)
495 next->e_value_offs +=
496 EXT2_EXTATTR_SIZE(entry->e_value_size);
498 next = EXT2_EXTATTR_NEXT(next);
501 min_offs += EXT2_EXTATTR_SIZE(entry->e_value_size);
507 ext2_extattr_delete_entry(char *off,
508 struct ext2fs_extattr_entry *first_entry,
509 struct ext2fs_extattr_entry *entry, char *end)
512 struct ext2fs_extattr_entry *next;
514 /* Clean entry value */
515 ext2_extattr_delete_value(off, first_entry, entry, end);
517 /* Clean the entry */
519 while (!EXT2_IS_LAST_ENTRY(next))
520 next = EXT2_EXTATTR_NEXT(next);
522 pad = (char*)next + sizeof(uint32_t);
524 memmove(entry, (char *)entry + EXT2_EXTATTR_LEN(entry->e_name_len),
525 pad - ((char *)entry + EXT2_EXTATTR_LEN(entry->e_name_len)));
529 ext2_extattr_inode_delete(struct inode *ip, int attrnamespace, const char *name)
533 struct ext2fs_extattr_dinode_header *header;
534 struct ext2fs_extattr_entry *entry;
535 const char *attr_name;
541 if ((error = bread(ip->i_devvp,
542 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
543 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
548 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
549 ((char *)bp->b_data +
550 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
552 /* Check attributes magic value */
553 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
554 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
556 if (header->h_magic != EXTATTR_MAGIC) {
561 error = ext2_extattr_check(EXT2_IFIRST(header),
562 (char *)dinode + EXT2_INODE_SIZE(fs));
568 /* If I am last entry, just make magic zero */
569 entry = EXT2_IFIRST(header);
570 if ((EXT2_IS_LAST_ENTRY(EXT2_EXTATTR_NEXT(entry))) &&
571 (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) ==
574 name_len = entry->e_name_len;
575 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
576 entry->e_name, &name_len);
582 if (strlen(name) == name_len &&
583 0 == strncmp(attr_name, name, name_len)) {
584 memset(header, 0, sizeof(struct ext2fs_extattr_dinode_header));
590 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
591 entry = EXT2_EXTATTR_NEXT(entry)) {
592 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
596 name_len = entry->e_name_len;
597 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
598 entry->e_name, &name_len);
604 if (strlen(name) == name_len &&
605 0 == strncmp(attr_name, name, name_len)) {
606 ext2_extattr_delete_entry((char *)EXT2_IFIRST(header),
607 EXT2_IFIRST(header), entry,
608 (char *)dinode + EXT2_INODE_SIZE(fs));
620 ext2_extattr_block_clone(struct inode *ip, struct buf **bpp)
625 struct ext2fs_extattr_header *header;
631 header = EXT2_HDR(sbp);
632 if (header->h_magic != EXTATTR_MAGIC || header->h_refcount == 1)
635 facl = ext2_alloc_meta(ip);
639 cbp = getblk(ip->i_devvp, fsbtodb(fs, facl), fs->e2fs_bsize, 0, 0, 0);
641 ext2_blkfree(ip, facl, fs->e2fs_bsize);
645 memcpy(cbp->b_data, sbp->b_data, fs->e2fs_bsize);
646 header->h_refcount--;
650 ext2_update(ip->i_vnode, 1);
652 header = EXT2_HDR(cbp);
653 header->h_refcount = 1;
661 ext2_extattr_block_delete(struct inode *ip, int attrnamespace, const char *name)
665 struct ext2fs_extattr_header *header;
666 struct ext2fs_extattr_entry *entry;
667 const char *attr_name;
673 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
674 fs->e2fs_bsize, NOCRED, &bp);
680 /* Check attributes magic value */
681 header = EXT2_HDR(bp);
682 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
687 error = ext2_extattr_block_check(ip, bp);
693 if (header->h_refcount > 1) {
694 error = ext2_extattr_block_clone(ip, &bp);
701 /* If I am last entry, clean me and free the block */
702 entry = EXT2_FIRST_ENTRY(bp);
703 if (EXT2_IS_LAST_ENTRY(EXT2_EXTATTR_NEXT(entry)) &&
704 (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) ==
707 name_len = entry->e_name_len;
708 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
709 entry->e_name, &name_len);
715 if (strlen(name) == name_len &&
716 0 == strncmp(attr_name, name, name_len)) {
717 ip->i_blocks -= btodb(fs->e2fs_bsize);
718 ext2_blkfree(ip, ip->i_facl, fs->e2fs_bsize);
720 error = ext2_update(ip->i_vnode, 1);
727 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
728 entry = EXT2_EXTATTR_NEXT(entry)) {
729 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
733 name_len = entry->e_name_len;
734 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
735 entry->e_name, &name_len);
741 if (strlen(name) == name_len &&
742 0 == strncmp(attr_name, name, name_len)) {
743 ext2_extattr_delete_entry(bp->b_data,
744 EXT2_FIRST_ENTRY(bp), entry,
745 bp->b_data + bp->b_bufsize);
756 static struct ext2fs_extattr_entry *
757 allocate_entry(const char *name, int attrnamespace, uint16_t offs,
758 uint32_t size, uint32_t hash)
760 const char *attr_name;
762 struct ext2fs_extattr_entry *entry;
764 attr_name = ext2_extattr_name_to_linux(attrnamespace, name);
765 name_len = strlen(attr_name);
767 entry = malloc(sizeof(struct ext2fs_extattr_entry) + name_len,
770 entry->e_name_len = name_len;
771 entry->e_name_index = ext2_extattr_attrnamespace_to_linux(attrnamespace, name);
772 entry->e_value_offs = offs;
773 entry->e_value_block = 0;
774 entry->e_value_size = size;
775 entry->e_hash = hash;
776 memcpy(entry->e_name, name, name_len);
782 free_entry(struct ext2fs_extattr_entry *entry)
789 ext2_extattr_get_size(struct ext2fs_extattr_entry *first_entry,
790 struct ext2fs_extattr_entry *exist_entry, int header_size,
791 int name_len, int new_size)
793 struct ext2fs_extattr_entry *entry;
797 size += sizeof(uint32_t);
799 if (NULL == exist_entry) {
800 size += EXT2_EXTATTR_LEN(name_len);
801 size += EXT2_EXTATTR_SIZE(new_size);
805 for (entry = first_entry; !EXT2_IS_LAST_ENTRY(entry);
806 entry = EXT2_EXTATTR_NEXT(entry)) {
807 if (entry != exist_entry)
808 size += EXT2_EXTATTR_LEN(entry->e_name_len) +
809 EXT2_EXTATTR_SIZE(entry->e_value_size);
811 size += EXT2_EXTATTR_LEN(entry->e_name_len) +
812 EXT2_EXTATTR_SIZE(new_size);
819 ext2_extattr_set_exist_entry(char *off,
820 struct ext2fs_extattr_entry *first_entry,
821 struct ext2fs_extattr_entry *entry,
822 char *end, struct uio *uio)
826 min_offs = ext2_extattr_delete_value(off, first_entry, entry, end);
828 entry->e_value_size = uio->uio_resid;
829 if (entry->e_value_size)
830 entry->e_value_offs = min_offs -
831 EXT2_EXTATTR_SIZE(uio->uio_resid);
833 entry->e_value_offs = 0;
835 uiomove(off + entry->e_value_offs, entry->e_value_size, uio);
838 static struct ext2fs_extattr_entry *
839 ext2_extattr_set_new_entry(char *off, struct ext2fs_extattr_entry *first_entry,
840 const char *name, int attrnamespace, char *end, struct uio *uio)
845 struct ext2fs_extattr_entry *entry;
846 struct ext2fs_extattr_entry *new_entry;
849 min_offs = end - off;
851 while (!EXT2_IS_LAST_ENTRY(entry)) {
852 if (min_offs > entry->e_value_offs && entry->e_value_offs > 0)
853 min_offs = entry->e_value_offs;
855 entry = EXT2_EXTATTR_NEXT(entry);
858 pad = (char*)entry + sizeof(uint32_t);
860 /* Find entry insert position */
861 name_len = strlen(name);
863 while (!EXT2_IS_LAST_ENTRY(entry)) {
864 if (!(attrnamespace - entry->e_name_index) &&
865 !(name_len - entry->e_name_len))
866 if (memcmp(name, entry->e_name, name_len) <= 0)
869 entry = EXT2_EXTATTR_NEXT(entry);
872 /* Create new entry and insert it */
873 new_entry = allocate_entry(name, attrnamespace, 0, uio->uio_resid, 0);
874 memmove((char *)entry + EXT2_EXTATTR_LEN(new_entry->e_name_len), entry,
877 memcpy(entry, new_entry, EXT2_EXTATTR_LEN(new_entry->e_name_len));
878 free_entry(new_entry);
881 if (new_entry->e_value_size > 0)
882 new_entry->e_value_offs = min_offs -
883 EXT2_EXTATTR_SIZE(new_entry->e_value_size);
885 uiomove(off + new_entry->e_value_offs, new_entry->e_value_size, uio);
891 ext2_extattr_inode_set(struct inode *ip, int attrnamespace,
892 const char *name, struct uio *uio)
896 struct ext2fs_extattr_dinode_header *header;
897 struct ext2fs_extattr_entry *entry;
898 const char *attr_name;
900 size_t size = 0, max_size;
905 if ((error = bread(ip->i_devvp,
906 fsbtodb(fs, ino_to_fsba(fs, ip->i_number)),
907 (int)fs->e2fs_bsize, NOCRED, &bp)) != 0) {
912 struct ext2fs_dinode *dinode = (struct ext2fs_dinode *)
913 ((char *)bp->b_data +
914 EXT2_INODE_SIZE(fs) * ino_to_fsbo(fs, ip->i_number));
916 /* Check attributes magic value */
917 header = (struct ext2fs_extattr_dinode_header *)((char *)dinode +
918 E2FS_REV0_INODE_SIZE + dinode->e2di_extra_isize);
920 if (header->h_magic != EXTATTR_MAGIC) {
925 error = ext2_extattr_check(EXT2_IFIRST(header), (char *)dinode +
926 EXT2_INODE_SIZE(fs));
932 /* Find if entry exist */
933 for (entry = EXT2_IFIRST(header); !EXT2_IS_LAST_ENTRY(entry);
934 entry = EXT2_EXTATTR_NEXT(entry)) {
935 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
939 name_len = entry->e_name_len;
940 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
941 entry->e_name, &name_len);
947 if (strlen(name) == name_len &&
948 0 == strncmp(attr_name, name, name_len))
952 max_size = EXT2_INODE_SIZE(fs) - E2FS_REV0_INODE_SIZE -
953 dinode->e2di_extra_isize;
955 if (!EXT2_IS_LAST_ENTRY(entry)) {
956 size = ext2_extattr_get_size(EXT2_IFIRST(header), entry,
957 sizeof(struct ext2fs_extattr_dinode_header),
958 entry->e_name_len, uio->uio_resid);
959 if (size > max_size) {
964 ext2_extattr_set_exist_entry((char *)EXT2_IFIRST(header),
965 EXT2_IFIRST(header), entry, (char *)header + max_size, uio);
967 /* Ensure that the same entry does not exist in the block */
969 error = ext2_extattr_block_get(ip, attrnamespace, name,
971 if (error != ENOATTR || size > 0) {
980 size = ext2_extattr_get_size(EXT2_IFIRST(header), NULL,
981 sizeof(struct ext2fs_extattr_dinode_header),
982 entry->e_name_len, uio->uio_resid);
983 if (size > max_size) {
988 ext2_extattr_set_new_entry((char *)EXT2_IFIRST(header),
989 EXT2_IFIRST(header), name, attrnamespace,
990 (char *)header + max_size, uio);
997 ext2_extattr_hash_entry(struct ext2fs_extattr_header *header,
998 struct ext2fs_extattr_entry *entry)
1001 char *name = entry->e_name;
1004 for (n=0; n < entry->e_name_len; n++) {
1005 hash = (hash << EXT2_EXTATTR_NAME_HASH_SHIFT) ^
1006 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_NAME_HASH_SHIFT)) ^
1010 if (entry->e_value_block == 0 && entry->e_value_size != 0) {
1011 uint32_t *value = (uint32_t *)((char *)header + entry->e_value_offs);
1012 for (n = (entry->e_value_size +
1013 EXT2_EXTATTR_ROUND) >> EXT2_EXTATTR_PAD_BITS; n; n--) {
1014 hash = (hash << EXT2_EXTATTR_VALUE_HASH_SHIFT) ^
1015 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_VALUE_HASH_SHIFT)) ^
1020 entry->e_hash = hash;
1024 ext2_extattr_rehash(struct ext2fs_extattr_header *header,
1025 struct ext2fs_extattr_entry *entry)
1027 struct ext2fs_extattr_entry *here;
1030 ext2_extattr_hash_entry(header, entry);
1032 here = EXT2_ENTRY(header+1);
1033 while (!EXT2_IS_LAST_ENTRY(here)) {
1034 if (!here->e_hash) {
1035 /* Block is not shared if an entry's hash value == 0 */
1040 hash = (hash << EXT2_EXTATTR_BLOCK_HASH_SHIFT) ^
1041 (hash >> (8*sizeof(hash) - EXT2_EXTATTR_BLOCK_HASH_SHIFT)) ^
1044 here = EXT2_EXTATTR_NEXT(here);
1047 header->h_hash = hash;
1051 ext2_extattr_block_set(struct inode *ip, int attrnamespace,
1052 const char *name, struct uio *uio)
1054 struct m_ext2fs *fs;
1056 struct ext2fs_extattr_header *header;
1057 struct ext2fs_extattr_entry *entry;
1058 const char *attr_name;
1066 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
1067 fs->e2fs_bsize, NOCRED, &bp);
1073 /* Check attributes magic value */
1074 header = EXT2_HDR(bp);
1075 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
1080 error = ext2_extattr_block_check(ip, bp);
1086 if (header->h_refcount > 1) {
1087 error = ext2_extattr_block_clone(ip, &bp);
1093 header = EXT2_HDR(bp);
1096 /* Find if entry exist */
1097 for (entry = EXT2_FIRST_ENTRY(bp); !EXT2_IS_LAST_ENTRY(entry);
1098 entry = EXT2_EXTATTR_NEXT(entry)) {
1099 if (ext2_extattr_attrnamespace_to_bsd(entry->e_name_index) !=
1103 name_len = entry->e_name_len;
1104 attr_name = ext2_extattr_name_to_bsd(entry->e_name_index,
1105 entry->e_name, &name_len);
1111 if (strlen(name) == name_len &&
1112 0 == strncmp(attr_name, name, name_len))
1116 if (!EXT2_IS_LAST_ENTRY(entry)) {
1117 size = ext2_extattr_get_size(EXT2_FIRST_ENTRY(bp), entry,
1118 sizeof(struct ext2fs_extattr_header),
1119 entry->e_name_len, uio->uio_resid);
1120 if (size > bp->b_bufsize) {
1125 ext2_extattr_set_exist_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1126 entry, bp->b_data + bp->b_bufsize, uio);
1128 size = ext2_extattr_get_size(EXT2_FIRST_ENTRY(bp), NULL,
1129 sizeof(struct ext2fs_extattr_header),
1130 strlen(name), uio->uio_resid);
1131 if (size > bp->b_bufsize) {
1136 entry = ext2_extattr_set_new_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1137 name, attrnamespace, bp->b_data + bp->b_bufsize, uio);
1139 /* Clean the same entry in the inode */
1140 error = ext2_extattr_inode_delete(ip, attrnamespace, name);
1141 if (error && error != ENOATTR) {
1147 ext2_extattr_rehash(header, entry);
1148 ext2_extattr_blk_csum_set(ip, bp);
1150 return (bwrite(bp));
1153 size = ext2_extattr_get_size(NULL, NULL,
1154 sizeof(struct ext2fs_extattr_header),
1155 strlen(ext2_extattr_name_to_linux(attrnamespace, name)), uio->uio_resid);
1156 if (size > fs->e2fs_bsize)
1159 /* Allocate block, fill EA header and insert entry */
1160 ip->i_facl = ext2_alloc_meta(ip);
1161 if (0 == ip->i_facl)
1164 ip->i_blocks += btodb(fs->e2fs_bsize);
1165 ext2_update(ip->i_vnode, 1);
1167 bp = getblk(ip->i_devvp, fsbtodb(fs, ip->i_facl), fs->e2fs_bsize, 0, 0, 0);
1169 ext2_blkfree(ip, ip->i_facl, fs->e2fs_bsize);
1170 ip->i_blocks -= btodb(fs->e2fs_bsize);
1172 ext2_update(ip->i_vnode, 1);
1176 header = EXT2_HDR(bp);
1177 header->h_magic = EXTATTR_MAGIC;
1178 header->h_refcount = 1;
1179 header->h_blocks = 1;
1181 memset(header->h_reserved, 0, sizeof(header->h_reserved));
1182 memcpy(bp->b_data, header, sizeof(struct ext2fs_extattr_header));
1183 memset(EXT2_FIRST_ENTRY(bp), 0, sizeof(uint32_t));
1185 entry = ext2_extattr_set_new_entry(bp->b_data, EXT2_FIRST_ENTRY(bp),
1186 name, attrnamespace, bp->b_data + bp->b_bufsize, uio);
1188 /* Clean the same entry in the inode */
1189 error = ext2_extattr_inode_delete(ip, attrnamespace, name);
1190 if (error && error != ENOATTR) {
1195 ext2_extattr_rehash(header, entry);
1196 ext2_extattr_blk_csum_set(ip, bp);
1198 return (bwrite(bp));
1201 int ext2_extattr_free(struct inode *ip)
1203 struct m_ext2fs *fs;
1205 struct ext2fs_extattr_header *header;
1213 error = bread(ip->i_devvp, fsbtodb(fs, ip->i_facl),
1214 fs->e2fs_bsize, NOCRED, &bp);
1220 /* Check attributes magic value */
1221 header = EXT2_HDR(bp);
1222 if (header->h_magic != EXTATTR_MAGIC || header->h_blocks != 1) {
1227 error = ext2_extattr_check(EXT2_FIRST_ENTRY(bp),
1228 bp->b_data + bp->b_bufsize);
1234 if (header->h_refcount > 1) {
1235 header->h_refcount--;
1238 ext2_blkfree(ip, ip->i_facl, ip->i_e2fs->e2fs_bsize);
1242 ip->i_blocks -= btodb(ip->i_e2fs->e2fs_bsize);
1244 ext2_update(ip->i_vnode, 1);