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Diffstat (limited to 'fs/ocfs2/xattr.c')
-rw-r--r--fs/ocfs2/xattr.c79
1 files changed, 79 insertions, 0 deletions
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 2e273c2cb831..3cc8385f9738 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -84,6 +84,10 @@ struct ocfs2_xattr_set_ctxt {
84#define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ 84#define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \
85 - sizeof(struct ocfs2_xattr_header) \ 85 - sizeof(struct ocfs2_xattr_header) \
86 - sizeof(__u32)) 86 - sizeof(__u32))
87#define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \
88 - sizeof(struct ocfs2_xattr_block) \
89 - sizeof(struct ocfs2_xattr_header) \
90 - sizeof(__u32))
87 91
88static struct ocfs2_xattr_def_value_root def_xv = { 92static struct ocfs2_xattr_def_value_root def_xv = {
89 .xv.xr_list.l_count = cpu_to_le16(1), 93 .xv.xr_list.l_count = cpu_to_le16(1),
@@ -402,6 +406,81 @@ int ocfs2_calc_security_init(struct inode *dir,
402 return ret; 406 return ret;
403} 407}
404 408
409int ocfs2_calc_xattr_init(struct inode *dir,
410 struct buffer_head *dir_bh,
411 int mode,
412 struct ocfs2_security_xattr_info *si,
413 int *want_clusters,
414 int *xattr_credits,
415 struct ocfs2_alloc_context **xattr_ac)
416{
417 int ret = 0;
418 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
419 int s_size = 0;
420 int a_size = 0;
421 int acl_len = 0;
422
423 if (si->enable)
424 s_size = ocfs2_xattr_entry_real_size(strlen(si->name),
425 si->value_len);
426
427 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) {
428 acl_len = ocfs2_xattr_get_nolock(dir, dir_bh,
429 OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
430 "", NULL, 0);
431 if (acl_len > 0) {
432 a_size = ocfs2_xattr_entry_real_size(0, acl_len);
433 if (S_ISDIR(mode))
434 a_size <<= 1;
435 } else if (acl_len != 0 && acl_len != -ENODATA) {
436 mlog_errno(ret);
437 return ret;
438 }
439 }
440
441 if (!(s_size + a_size))
442 return ret;
443
444 /*
445 * The max space of security xattr taken inline is
446 * 256(name) + 80(value) + 16(entry) = 352 bytes,
447 * The max space of acl xattr taken inline is
448 * 80(value) + 16(entry) * 2(if directory) = 192 bytes,
449 * when blocksize = 512, may reserve one more cluser for
450 * xattr bucket, otherwise reserve one metadata block
451 * for them is ok.
452 */
453 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE ||
454 (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) {
455 ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac);
456 if (ret) {
457 mlog_errno(ret);
458 return ret;
459 }
460 *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS;
461 }
462
463 if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE &&
464 (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) {
465 *want_clusters += 1;
466 *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb);
467 }
468
469 /* reserve clusters for xattr value which will be set in B tree*/
470 if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE)
471 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
472 si->value_len);
473 if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL &&
474 acl_len > OCFS2_XATTR_INLINE_SIZE) {
475 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, acl_len);
476 if (S_ISDIR(mode))
477 *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb,
478 acl_len);
479 }
480
481 return ret;
482}
483
405static int ocfs2_xattr_extend_allocation(struct inode *inode, 484static int ocfs2_xattr_extend_allocation(struct inode *inode,
406 u32 clusters_to_add, 485 u32 clusters_to_add,
407 struct buffer_head *xattr_bh, 486 struct buffer_head *xattr_bh,