X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Focfs2%2Fxattr.c;h=5efcf4e85d7cf68870d14c8f3bfed11efca4b952;hb=2b656c1d6fc5ba7791a360766780a212faed5705;hp=acccdfabd2d6b569efef771391f594e2765c3a5a;hpb=589dc2602f2a1b7fa5e59b90f548af189f128d77;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c index acccdfa..5efcf4e 100644 --- a/fs/ocfs2/xattr.c +++ b/fs/ocfs2/xattr.c @@ -3,25 +3,20 @@ * * xattr.c * - * Copyright (C) 2008 Oracle. All rights reserved. + * Copyright (C) 2004, 2008 Oracle. All rights reserved. * * CREDITS: - * Lots of code in this file is taken from ext3. + * Lots of code in this file is copy from linux/fs/ext3/xattr.c. + * Copyright (C) 2001-2003 Andreas Gruenbacher, * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. + * License version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. - * - * You should have received a copy of the GNU General Public - * License along with this program; if not, write to the - * Free Software Foundation, Inc., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. */ #include @@ -36,6 +31,11 @@ #include #include #include +#include +#include +#include +#include +#include #define MLOG_MASK_PREFIX ML_XATTR #include @@ -62,12 +62,32 @@ struct ocfs2_xattr_def_value_root { }; struct ocfs2_xattr_bucket { - struct buffer_head *bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; - struct ocfs2_xattr_header *xh; + /* The inode these xattrs are associated with */ + struct inode *bu_inode; + + /* The actual buffers that make up the bucket */ + struct buffer_head *bu_bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; + + /* How many blocks make up one bucket for this filesystem */ + int bu_blocks; +}; + +struct ocfs2_xattr_set_ctxt { + handle_t *handle; + struct ocfs2_alloc_context *meta_ac; + struct ocfs2_alloc_context *data_ac; + struct ocfs2_cached_dealloc_ctxt dealloc; }; #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) #define OCFS2_XATTR_INLINE_SIZE 80 +#define OCFS2_XATTR_FREE_IN_IBODY (OCFS2_MIN_XATTR_INLINE_SIZE \ + - sizeof(struct ocfs2_xattr_header) \ + - sizeof(__u32)) +#define OCFS2_XATTR_FREE_IN_BLOCK(ptr) ((ptr)->i_sb->s_blocksize \ + - sizeof(struct ocfs2_xattr_block) \ + - sizeof(struct ocfs2_xattr_header) \ + - sizeof(__u32)) static struct ocfs2_xattr_def_value_root def_xv = { .xv.xr_list.l_count = cpu_to_le16(1), @@ -75,13 +95,25 @@ static struct ocfs2_xattr_def_value_root def_xv = { struct xattr_handler *ocfs2_xattr_handlers[] = { &ocfs2_xattr_user_handler, +#ifdef CONFIG_OCFS2_FS_POSIX_ACL + &ocfs2_xattr_acl_access_handler, + &ocfs2_xattr_acl_default_handler, +#endif &ocfs2_xattr_trusted_handler, + &ocfs2_xattr_security_handler, NULL }; -static struct xattr_handler *ocfs2_xattr_handler_map[] = { +static struct xattr_handler *ocfs2_xattr_handler_map[OCFS2_XATTR_MAX] = { [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, +#ifdef CONFIG_OCFS2_FS_POSIX_ACL + [OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS] + = &ocfs2_xattr_acl_access_handler, + [OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT] + = &ocfs2_xattr_acl_default_handler, +#endif [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, + [OCFS2_XATTR_INDEX_SECURITY] = &ocfs2_xattr_security_handler, }; struct ocfs2_xattr_info { @@ -99,7 +131,7 @@ struct ocfs2_xattr_search { */ struct buffer_head *xattr_bh; struct ocfs2_xattr_header *header; - struct ocfs2_xattr_bucket bucket; + struct ocfs2_xattr_bucket *bucket; void *base; void *end; struct ocfs2_xattr_entry *here; @@ -112,6 +144,10 @@ static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, int *block_off, int *new_offset); +static int ocfs2_xattr_block_find(struct inode *inode, + int name_index, + const char *name, + struct ocfs2_xattr_search *xs); static int ocfs2_xattr_index_block_find(struct inode *inode, struct buffer_head *root_bh, int name_index, @@ -123,32 +159,235 @@ static int ocfs2_xattr_tree_list_index_block(struct inode *inode, char *buffer, size_t buffer_size); -static inline struct xattr_handler *ocfs2_xattr_handler(int name_index) +static int ocfs2_xattr_create_index_block(struct inode *inode, + struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt); + +static int ocfs2_xattr_set_entry_index_block(struct inode *inode, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt); + +static int ocfs2_delete_xattr_index_block(struct inode *inode, + struct buffer_head *xb_bh); + +static inline u16 ocfs2_xattr_buckets_per_cluster(struct ocfs2_super *osb) +{ + return (1 << osb->s_clustersize_bits) / OCFS2_XATTR_BUCKET_SIZE; +} + +static inline u16 ocfs2_blocks_per_xattr_bucket(struct super_block *sb) +{ + return OCFS2_XATTR_BUCKET_SIZE / (1 << sb->s_blocksize_bits); +} + +static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb) +{ + u16 len = sb->s_blocksize - + offsetof(struct ocfs2_xattr_header, xh_entries); + + return len / sizeof(struct ocfs2_xattr_entry); +} + +#define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr) +#define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data) +#define bucket_xh(_b) ((struct ocfs2_xattr_header *)bucket_block((_b), 0)) + +static struct ocfs2_xattr_bucket *ocfs2_xattr_bucket_new(struct inode *inode) +{ + struct ocfs2_xattr_bucket *bucket; + int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); + + BUG_ON(blks > OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET); + + bucket = kzalloc(sizeof(struct ocfs2_xattr_bucket), GFP_NOFS); + if (bucket) { + bucket->bu_inode = inode; + bucket->bu_blocks = blks; + } + + return bucket; +} + +static void ocfs2_xattr_bucket_relse(struct ocfs2_xattr_bucket *bucket) +{ + int i; + + for (i = 0; i < bucket->bu_blocks; i++) { + brelse(bucket->bu_bhs[i]); + bucket->bu_bhs[i] = NULL; + } +} + +static void ocfs2_xattr_bucket_free(struct ocfs2_xattr_bucket *bucket) +{ + if (bucket) { + ocfs2_xattr_bucket_relse(bucket); + bucket->bu_inode = NULL; + kfree(bucket); + } +} + +/* + * A bucket that has never been written to disk doesn't need to be + * read. We just need the buffer_heads. Don't call this for + * buckets that are already on disk. ocfs2_read_xattr_bucket() initializes + * them fully. + */ +static int ocfs2_init_xattr_bucket(struct ocfs2_xattr_bucket *bucket, + u64 xb_blkno) +{ + int i, rc = 0; + + for (i = 0; i < bucket->bu_blocks; i++) { + bucket->bu_bhs[i] = sb_getblk(bucket->bu_inode->i_sb, + xb_blkno + i); + if (!bucket->bu_bhs[i]) { + rc = -EIO; + mlog_errno(rc); + break; + } + + if (!ocfs2_buffer_uptodate(bucket->bu_inode, + bucket->bu_bhs[i])) + ocfs2_set_new_buffer_uptodate(bucket->bu_inode, + bucket->bu_bhs[i]); + } + + if (rc) + ocfs2_xattr_bucket_relse(bucket); + return rc; +} + +/* Read the xattr bucket at xb_blkno */ +static int ocfs2_read_xattr_bucket(struct ocfs2_xattr_bucket *bucket, + u64 xb_blkno) +{ + int rc; + + rc = ocfs2_read_blocks(bucket->bu_inode, xb_blkno, + bucket->bu_blocks, bucket->bu_bhs, 0, + NULL); + if (rc) + ocfs2_xattr_bucket_relse(bucket); + return rc; +} + +static int ocfs2_xattr_bucket_journal_access(handle_t *handle, + struct ocfs2_xattr_bucket *bucket, + int type) +{ + int i, rc = 0; + + for (i = 0; i < bucket->bu_blocks; i++) { + rc = ocfs2_journal_access(handle, bucket->bu_inode, + bucket->bu_bhs[i], type); + if (rc) { + mlog_errno(rc); + break; + } + } + + return rc; +} + +static void ocfs2_xattr_bucket_journal_dirty(handle_t *handle, + struct ocfs2_xattr_bucket *bucket) +{ + int i; + + for (i = 0; i < bucket->bu_blocks; i++) + ocfs2_journal_dirty(handle, bucket->bu_bhs[i]); +} + +static void ocfs2_xattr_bucket_copy_data(struct ocfs2_xattr_bucket *dest, + struct ocfs2_xattr_bucket *src) +{ + int i; + int blocksize = src->bu_inode->i_sb->s_blocksize; + + BUG_ON(dest->bu_blocks != src->bu_blocks); + BUG_ON(dest->bu_inode != src->bu_inode); + + for (i = 0; i < src->bu_blocks; i++) { + memcpy(bucket_block(dest, i), bucket_block(src, i), + blocksize); + } +} + +static int ocfs2_validate_xattr_block(struct super_block *sb, + struct buffer_head *bh) +{ + struct ocfs2_xattr_block *xb = + (struct ocfs2_xattr_block *)bh->b_data; + + mlog(0, "Validating xattr block %llu\n", + (unsigned long long)bh->b_blocknr); + + if (!OCFS2_IS_VALID_XATTR_BLOCK(xb)) { + ocfs2_error(sb, + "Extended attribute block #%llu has bad " + "signature %.*s", + (unsigned long long)bh->b_blocknr, 7, + xb->xb_signature); + return -EINVAL; + } + + if (le64_to_cpu(xb->xb_blkno) != bh->b_blocknr) { + ocfs2_error(sb, + "Extended attribute block #%llu has an " + "invalid xb_blkno of %llu", + (unsigned long long)bh->b_blocknr, + (unsigned long long)le64_to_cpu(xb->xb_blkno)); + return -EINVAL; + } + + if (le32_to_cpu(xb->xb_fs_generation) != OCFS2_SB(sb)->fs_generation) { + ocfs2_error(sb, + "Extended attribute block #%llu has an invalid " + "xb_fs_generation of #%u", + (unsigned long long)bh->b_blocknr, + le32_to_cpu(xb->xb_fs_generation)); + return -EINVAL; + } + + return 0; +} + +static int ocfs2_read_xattr_block(struct inode *inode, u64 xb_blkno, + struct buffer_head **bh) +{ + int rc; + struct buffer_head *tmp = *bh; + + rc = ocfs2_read_block(inode, xb_blkno, &tmp, + ocfs2_validate_xattr_block); + + /* If ocfs2_read_block() got us a new bh, pass it up. */ + if (!rc && !*bh) + *bh = tmp; + + return rc; +} + +static inline const char *ocfs2_xattr_prefix(int name_index) { struct xattr_handler *handler = NULL; if (name_index > 0 && name_index < OCFS2_XATTR_MAX) handler = ocfs2_xattr_handler_map[name_index]; - return handler; + return handler ? handler->prefix : NULL; } -static inline u32 ocfs2_xattr_name_hash(struct inode *inode, - char *prefix, - int prefix_len, - char *name, - int name_len) +static u32 ocfs2_xattr_name_hash(struct inode *inode, + const char *name, + int name_len) { /* Get hash value of uuid from super block */ u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash; int i; - /* hash extended attribute prefix */ - for (i = 0; i < prefix_len; i++) { - hash = (hash << OCFS2_HASH_SHIFT) ^ - (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ - *prefix++; - } /* hash extended attribute name */ for (i = 0; i < name_len; i++) { hash = (hash << OCFS2_HASH_SHIFT) ^ @@ -169,57 +408,152 @@ static void ocfs2_xattr_hash_entry(struct inode *inode, struct ocfs2_xattr_entry *entry) { u32 hash = 0; - struct xattr_handler *handler = - ocfs2_xattr_handler(ocfs2_xattr_get_type(entry)); - char *prefix = handler->prefix; char *name = (char *)header + le16_to_cpu(entry->xe_name_offset); - int prefix_len = strlen(handler->prefix); - hash = ocfs2_xattr_name_hash(inode, prefix, prefix_len, name, - entry->xe_name_len); + hash = ocfs2_xattr_name_hash(inode, name, entry->xe_name_len); entry->xe_name_hash = cpu_to_le32(hash); return; } +static int ocfs2_xattr_entry_real_size(int name_len, size_t value_len) +{ + int size = 0; + + if (value_len <= OCFS2_XATTR_INLINE_SIZE) + size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(value_len); + else + size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; + size += sizeof(struct ocfs2_xattr_entry); + + return size; +} + +int ocfs2_calc_security_init(struct inode *dir, + struct ocfs2_security_xattr_info *si, + int *want_clusters, + int *xattr_credits, + struct ocfs2_alloc_context **xattr_ac) +{ + int ret = 0; + struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); + int s_size = ocfs2_xattr_entry_real_size(strlen(si->name), + si->value_len); + + /* + * The max space of security xattr taken inline is + * 256(name) + 80(value) + 16(entry) = 352 bytes, + * So reserve one metadata block for it is ok. + */ + if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || + s_size > OCFS2_XATTR_FREE_IN_IBODY) { + ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); + if (ret) { + mlog_errno(ret); + return ret; + } + *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; + } + + /* reserve clusters for xattr value which will be set in B tree*/ + if (si->value_len > OCFS2_XATTR_INLINE_SIZE) + *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, + si->value_len); + return ret; +} + +int ocfs2_calc_xattr_init(struct inode *dir, + struct buffer_head *dir_bh, + int mode, + struct ocfs2_security_xattr_info *si, + int *want_clusters, + int *xattr_credits, + struct ocfs2_alloc_context **xattr_ac) +{ + int ret = 0; + struct ocfs2_super *osb = OCFS2_SB(dir->i_sb); + int s_size = 0; + int a_size = 0; + int acl_len = 0; + + if (si->enable) + s_size = ocfs2_xattr_entry_real_size(strlen(si->name), + si->value_len); + + if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL) { + acl_len = ocfs2_xattr_get_nolock(dir, dir_bh, + OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT, + "", NULL, 0); + if (acl_len > 0) { + a_size = ocfs2_xattr_entry_real_size(0, acl_len); + if (S_ISDIR(mode)) + a_size <<= 1; + } else if (acl_len != 0 && acl_len != -ENODATA) { + mlog_errno(ret); + return ret; + } + } + + if (!(s_size + a_size)) + return ret; + + /* + * The max space of security xattr taken inline is + * 256(name) + 80(value) + 16(entry) = 352 bytes, + * The max space of acl xattr taken inline is + * 80(value) + 16(entry) * 2(if directory) = 192 bytes, + * when blocksize = 512, may reserve one more cluser for + * xattr bucket, otherwise reserve one metadata block + * for them is ok. + */ + if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE || + (s_size + a_size) > OCFS2_XATTR_FREE_IN_IBODY) { + ret = ocfs2_reserve_new_metadata_blocks(osb, 1, xattr_ac); + if (ret) { + mlog_errno(ret); + return ret; + } + *xattr_credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; + } + + if (dir->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE && + (s_size + a_size) > OCFS2_XATTR_FREE_IN_BLOCK(dir)) { + *want_clusters += 1; + *xattr_credits += ocfs2_blocks_per_xattr_bucket(dir->i_sb); + } + + /* reserve clusters for xattr value which will be set in B tree*/ + if (si->enable && si->value_len > OCFS2_XATTR_INLINE_SIZE) + *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, + si->value_len); + if (osb->s_mount_opt & OCFS2_MOUNT_POSIX_ACL && + acl_len > OCFS2_XATTR_INLINE_SIZE) { + *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, acl_len); + if (S_ISDIR(mode)) + *want_clusters += ocfs2_clusters_for_bytes(dir->i_sb, + acl_len); + } + + return ret; +} + static int ocfs2_xattr_extend_allocation(struct inode *inode, u32 clusters_to_add, struct buffer_head *xattr_bh, - struct ocfs2_xattr_value_root *xv) + struct ocfs2_xattr_value_root *xv, + struct ocfs2_xattr_set_ctxt *ctxt) { int status = 0; - int restart_func = 0; - int credits = 0; - handle_t *handle = NULL; - struct ocfs2_alloc_context *data_ac = NULL; - struct ocfs2_alloc_context *meta_ac = NULL; + handle_t *handle = ctxt->handle; enum ocfs2_alloc_restarted why; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - struct ocfs2_extent_list *root_el = &xv->xr_list; u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters); + struct ocfs2_extent_tree et; mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add); -restart_all: - - status = ocfs2_lock_allocators(inode, xattr_bh, root_el, - clusters_to_add, 0, &data_ac, - &meta_ac, OCFS2_XATTR_VALUE_EXTENT, xv); - if (status) { - mlog_errno(status); - goto leave; - } - - credits = ocfs2_calc_extend_credits(osb->sb, root_el, clusters_to_add); - handle = ocfs2_start_trans(osb, credits); - if (IS_ERR(handle)) { - status = PTR_ERR(handle); - handle = NULL; - mlog_errno(status); - goto leave; - } + ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv); -restarted_transaction: status = ocfs2_journal_access(handle, inode, xattr_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (status < 0) { @@ -233,17 +567,13 @@ restarted_transaction: &logical_start, clusters_to_add, 0, - xattr_bh, - root_el, + &et, handle, - data_ac, - meta_ac, - &why, - OCFS2_XATTR_VALUE_EXTENT, - xv); - if ((status < 0) && (status != -EAGAIN)) { - if (status != -ENOSPC) - mlog_errno(status); + ctxt->data_ac, + ctxt->meta_ac, + &why); + if (status < 0) { + mlog_errno(status); goto leave; } @@ -255,47 +585,13 @@ restarted_transaction: clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters; - if (why != RESTART_NONE && clusters_to_add) { - if (why == RESTART_META) { - mlog(0, "restarting function.\n"); - restart_func = 1; - } else { - BUG_ON(why != RESTART_TRANS); - - mlog(0, "restarting transaction.\n"); - /* TODO: This can be more intelligent. */ - credits = ocfs2_calc_extend_credits(osb->sb, - root_el, - clusters_to_add); - status = ocfs2_extend_trans(handle, credits); - if (status < 0) { - /* handle still has to be committed at - * this point. */ - status = -ENOMEM; - mlog_errno(status); - goto leave; - } - goto restarted_transaction; - } - } + /* + * We should have already allocated enough space before the transaction, + * so no need to restart. + */ + BUG_ON(why != RESTART_NONE || clusters_to_add); leave: - if (handle) { - ocfs2_commit_trans(osb, handle); - handle = NULL; - } - if (data_ac) { - ocfs2_free_alloc_context(data_ac); - data_ac = NULL; - } - if (meta_ac) { - ocfs2_free_alloc_context(meta_ac); - meta_ac = NULL; - } - if ((!status) && restart_func) { - restart_func = 0; - goto restart_all; - } return status; } @@ -304,52 +600,27 @@ static int __ocfs2_remove_xattr_range(struct inode *inode, struct buffer_head *root_bh, struct ocfs2_xattr_value_root *xv, u32 cpos, u32 phys_cpos, u32 len, - struct ocfs2_cached_dealloc_ctxt *dealloc) + struct ocfs2_xattr_set_ctxt *ctxt) { int ret; u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - struct inode *tl_inode = osb->osb_tl_inode; - handle_t *handle; - struct ocfs2_alloc_context *meta_ac = NULL; - - ret = ocfs2_lock_allocators(inode, root_bh, &xv->xr_list, - 0, 1, NULL, &meta_ac, - OCFS2_XATTR_VALUE_EXTENT, xv); - if (ret) { - mlog_errno(ret); - return ret; - } - - mutex_lock(&tl_inode->i_mutex); - - if (ocfs2_truncate_log_needs_flush(osb)) { - ret = __ocfs2_flush_truncate_log(osb); - if (ret < 0) { - mlog_errno(ret); - goto out; - } - } + handle_t *handle = ctxt->handle; + struct ocfs2_extent_tree et; - handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - mlog_errno(ret); - goto out; - } + ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv); ret = ocfs2_journal_access(handle, inode, root_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } - ret = ocfs2_remove_extent(inode, root_bh, cpos, len, handle, meta_ac, - dealloc, OCFS2_XATTR_VALUE_EXTENT, xv); + ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac, + &ctxt->dealloc); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } le32_add_cpu(&xv->xr_clusters, -len); @@ -357,21 +628,14 @@ static int __ocfs2_remove_xattr_range(struct inode *inode, ret = ocfs2_journal_dirty(handle, root_bh); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } - ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len); + ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len); if (ret) mlog_errno(ret); -out_commit: - ocfs2_commit_trans(osb, handle); out: - mutex_unlock(&tl_inode->i_mutex); - - if (meta_ac) - ocfs2_free_alloc_context(meta_ac); - return ret; } @@ -379,15 +643,12 @@ static int ocfs2_xattr_shrink_size(struct inode *inode, u32 old_clusters, u32 new_clusters, struct buffer_head *root_bh, - struct ocfs2_xattr_value_root *xv) + struct ocfs2_xattr_value_root *xv, + struct ocfs2_xattr_set_ctxt *ctxt) { int ret = 0; u32 trunc_len, cpos, phys_cpos, alloc_size; u64 block; - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); - struct ocfs2_cached_dealloc_ctxt dealloc; - - ocfs2_init_dealloc_ctxt(&dealloc); if (old_clusters <= new_clusters) return 0; @@ -407,7 +668,7 @@ static int ocfs2_xattr_shrink_size(struct inode *inode, ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos, phys_cpos, alloc_size, - &dealloc); + ctxt); if (ret) { mlog_errno(ret); goto out; @@ -421,16 +682,14 @@ static int ocfs2_xattr_shrink_size(struct inode *inode, } out: - ocfs2_schedule_truncate_log_flush(osb, 1); - ocfs2_run_deallocs(osb, &dealloc); - return ret; } static int ocfs2_xattr_value_truncate(struct inode *inode, struct buffer_head *root_bh, struct ocfs2_xattr_value_root *xv, - int len) + int len, + struct ocfs2_xattr_set_ctxt *ctxt) { int ret; u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); @@ -442,42 +701,65 @@ static int ocfs2_xattr_value_truncate(struct inode *inode, if (new_clusters > old_clusters) ret = ocfs2_xattr_extend_allocation(inode, new_clusters - old_clusters, - root_bh, xv); + root_bh, xv, ctxt); else ret = ocfs2_xattr_shrink_size(inode, old_clusters, new_clusters, - root_bh, xv); + root_bh, xv, ctxt); return ret; } +static int ocfs2_xattr_list_entry(char *buffer, size_t size, + size_t *result, const char *prefix, + const char *name, int name_len) +{ + char *p = buffer + *result; + int prefix_len = strlen(prefix); + int total_len = prefix_len + name_len + 1; + + *result += total_len; + + /* we are just looking for how big our buffer needs to be */ + if (!size) + return 0; + + if (*result > size) + return -ERANGE; + + memcpy(p, prefix, prefix_len); + memcpy(p + prefix_len, name, name_len); + p[prefix_len + name_len] = '\0'; + + return 0; +} + static int ocfs2_xattr_list_entries(struct inode *inode, struct ocfs2_xattr_header *header, char *buffer, size_t buffer_size) { - size_t rest = buffer_size; - int i; + size_t result = 0; + int i, type, ret; + const char *prefix, *name; for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) { struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; - struct xattr_handler *handler = - ocfs2_xattr_handler(ocfs2_xattr_get_type(entry)); - - if (handler) { - size_t size = handler->list(inode, buffer, rest, - ((char *)header + - le16_to_cpu(entry->xe_name_offset)), - entry->xe_name_len); - if (buffer) { - if (size > rest) - return -ERANGE; - buffer += size; - } - rest -= size; + type = ocfs2_xattr_get_type(entry); + prefix = ocfs2_xattr_prefix(type); + + if (prefix) { + name = (const char *)header + + le16_to_cpu(entry->xe_name_offset); + + ret = ocfs2_xattr_list_entry(buffer, buffer_size, + &result, prefix, name, + entry->xe_name_len); + if (ret) + return ret; } } - return buffer_size - rest; + return result; } static int ocfs2_xattr_ibody_list(struct inode *inode, @@ -513,22 +795,14 @@ static int ocfs2_xattr_block_list(struct inode *inode, if (!di->i_xattr_loc) return ret; - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), - le64_to_cpu(di->i_xattr_loc), - &blk_bh, OCFS2_BH_CACHED, inode); + ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), + &blk_bh); if (ret < 0) { mlog_errno(ret); return ret; } - /*Verify the signature of xattr block*/ - if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, - strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { - ret = -EFAULT; - goto cleanup; - } xb = (struct ocfs2_xattr_block *)blk_bh->b_data; - if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { struct ocfs2_xattr_header *header = &xb->xb_attrs.xb_header; ret = ocfs2_xattr_list_entries(inode, header, @@ -538,7 +812,7 @@ static int ocfs2_xattr_block_list(struct inode *inode, ret = ocfs2_xattr_tree_list_index_block(inode, xt, buffer, buffer_size); } -cleanup: + brelse(blk_bh); return ret; @@ -553,6 +827,9 @@ ssize_t ocfs2_listxattr(struct dentry *dentry, struct ocfs2_dinode *di = NULL; struct ocfs2_inode_info *oi = OCFS2_I(dentry->d_inode); + if (!ocfs2_supports_xattr(OCFS2_SB(dentry->d_sb))) + return -EOPNOTSUPP; + if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) return ret; @@ -645,8 +922,7 @@ static int ocfs2_xattr_get_value_outside(struct inode *inode, blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); /* Copy ocfs2_xattr_value */ for (i = 0; i < num_clusters * bpc; i++, blkno++) { - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno, - &bh, OCFS2_BH_CACHED, inode); + ret = ocfs2_read_block(inode, blkno, &bh, NULL); if (ret) { mlog_errno(ret); goto out; @@ -725,49 +1001,30 @@ static int ocfs2_xattr_block_get(struct inode *inode, size_t buffer_size, struct ocfs2_xattr_search *xs) { - struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; - struct buffer_head *blk_bh = NULL; struct ocfs2_xattr_block *xb; struct ocfs2_xattr_value_root *xv; size_t size; int ret = -ENODATA, name_offset, name_len, block_off, i; - if (!di->i_xattr_loc) - return ret; - - memset(&xs->bucket, 0, sizeof(xs->bucket)); - - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), - le64_to_cpu(di->i_xattr_loc), - &blk_bh, OCFS2_BH_CACHED, inode); - if (ret < 0) { + xs->bucket = ocfs2_xattr_bucket_new(inode); + if (!xs->bucket) { + ret = -ENOMEM; mlog_errno(ret); - return ret; + goto cleanup; } - /*Verify the signature of xattr block*/ - if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, - strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { - ret = -EFAULT; + + ret = ocfs2_xattr_block_find(inode, name_index, name, xs); + if (ret) { + mlog_errno(ret); goto cleanup; } - xs->xattr_bh = blk_bh; - xb = (struct ocfs2_xattr_block *)blk_bh->b_data; + if (xs->not_found) { + ret = -ENODATA; + goto cleanup; + } - if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { - xs->header = &xb->xb_attrs.xb_header; - xs->base = (void *)xs->header; - xs->end = (void *)(blk_bh->b_data) + blk_bh->b_size; - xs->here = xs->header->xh_entries; - - ret = ocfs2_xattr_find_entry(name_index, name, xs); - } else - ret = ocfs2_xattr_index_block_find(inode, blk_bh, - name_index, - name, xs); - - if (ret) - goto cleanup; + xb = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; size = le64_to_cpu(xs->here->xe_value_size); if (buffer) { ret = -ERANGE; @@ -780,11 +1037,11 @@ static int ocfs2_xattr_block_get(struct inode *inode, if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { ret = ocfs2_xattr_bucket_get_name_value(inode, - xs->bucket.xh, + bucket_xh(xs->bucket), i, &block_off, &name_offset); - xs->base = xs->bucket.bhs[block_off]->b_data; + xs->base = bucket_block(xs->bucket, block_off); } if (ocfs2_xattr_is_local(xs->here)) { memcpy(buffer, (void *)xs->base + @@ -802,28 +1059,22 @@ static int ocfs2_xattr_block_get(struct inode *inode, } ret = size; cleanup: - for (i = 0; i < OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET; i++) - brelse(xs->bucket.bhs[i]); - memset(&xs->bucket, 0, sizeof(xs->bucket)); + ocfs2_xattr_bucket_free(xs->bucket); - brelse(blk_bh); + brelse(xs->xattr_bh); + xs->xattr_bh = NULL; return ret; } -/* ocfs2_xattr_get() - * - * Copy an extended attribute into the buffer provided. - * Buffer is NULL to compute the size of buffer required. - */ -int ocfs2_xattr_get(struct inode *inode, - int name_index, - const char *name, - void *buffer, - size_t buffer_size) +int ocfs2_xattr_get_nolock(struct inode *inode, + struct buffer_head *di_bh, + int name_index, + const char *name, + void *buffer, + size_t buffer_size) { int ret; struct ocfs2_dinode *di = NULL; - struct buffer_head *di_bh = NULL; struct ocfs2_inode_info *oi = OCFS2_I(inode); struct ocfs2_xattr_search xis = { .not_found = -ENODATA, @@ -832,24 +1083,48 @@ int ocfs2_xattr_get(struct inode *inode, .not_found = -ENODATA, }; + if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) + return -EOPNOTSUPP; + if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) ret = -ENODATA; - ret = ocfs2_inode_lock(inode, &di_bh, 0); - if (ret < 0) { - mlog_errno(ret); - return ret; - } xis.inode_bh = xbs.inode_bh = di_bh; di = (struct ocfs2_dinode *)di_bh->b_data; down_read(&oi->ip_xattr_sem); ret = ocfs2_xattr_ibody_get(inode, name_index, name, buffer, buffer_size, &xis); - if (ret == -ENODATA) + if (ret == -ENODATA && di->i_xattr_loc) ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, buffer_size, &xbs); up_read(&oi->ip_xattr_sem); + + return ret; +} + +/* ocfs2_xattr_get() + * + * Copy an extended attribute into the buffer provided. + * Buffer is NULL to compute the size of buffer required. + */ +static int ocfs2_xattr_get(struct inode *inode, + int name_index, + const char *name, + void *buffer, + size_t buffer_size) +{ + int ret; + struct buffer_head *di_bh = NULL; + + ret = ocfs2_inode_lock(inode, &di_bh, 0); + if (ret < 0) { + mlog_errno(ret); + return ret; + } + ret = ocfs2_xattr_get_nolock(inode, di_bh, name_index, + name, buffer, buffer_size); + ocfs2_inode_unlock(inode, 0); brelse(di_bh); @@ -858,6 +1133,7 @@ int ocfs2_xattr_get(struct inode *inode, } static int __ocfs2_xattr_set_value_outside(struct inode *inode, + handle_t *handle, struct ocfs2_xattr_value_root *xv, const void *value, int value_len) @@ -869,14 +1145,17 @@ static int __ocfs2_xattr_set_value_outside(struct inode *inode, u32 clusters = ocfs2_clusters_for_bytes(inode->i_sb, value_len); u64 blkno; struct buffer_head *bh = NULL; - handle_t *handle; BUG_ON(clusters > le32_to_cpu(xv->xr_clusters)); + /* + * In __ocfs2_xattr_set_value_outside has already been dirtied, + * so we don't need to worry about whether ocfs2_extend_trans + * will create a new transactio for us or not. + */ credits = clusters * bpc; - handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), credits); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); + ret = ocfs2_extend_trans(handle, credits); + if (ret) { mlog_errno(ret); goto out; } @@ -886,17 +1165,16 @@ static int __ocfs2_xattr_set_value_outside(struct inode *inode, &num_clusters, &xv->xr_list); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cluster); for (i = 0; i < num_clusters * bpc; i++, blkno++) { - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno, - &bh, OCFS2_BH_CACHED, inode); + ret = ocfs2_read_block(inode, blkno, &bh, NULL); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } ret = ocfs2_journal_access(handle, @@ -905,7 +1183,7 @@ static int __ocfs2_xattr_set_value_outside(struct inode *inode, OCFS2_JOURNAL_ACCESS_WRITE); if (ret < 0) { mlog_errno(ret); - goto out_commit; + goto out; } cp_len = value_len > blocksize ? blocksize : value_len; @@ -919,7 +1197,7 @@ static int __ocfs2_xattr_set_value_outside(struct inode *inode, ret = ocfs2_journal_dirty(handle, bh); if (ret < 0) { mlog_errno(ret); - goto out_commit; + goto out; } brelse(bh); bh = NULL; @@ -933,8 +1211,6 @@ static int __ocfs2_xattr_set_value_outside(struct inode *inode, } cpos += num_clusters; } -out_commit: - ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); out: brelse(bh); @@ -942,28 +1218,21 @@ out: } static int ocfs2_xattr_cleanup(struct inode *inode, + handle_t *handle, struct ocfs2_xattr_info *xi, struct ocfs2_xattr_search *xs, size_t offs) { - handle_t *handle = NULL; int ret = 0; size_t name_len = strlen(xi->name); void *val = xs->base + offs; size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; - handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), - OCFS2_XATTR_BLOCK_UPDATE_CREDITS); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - mlog_errno(ret); - goto out; - } ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } /* Decrease xattr count */ le16_add_cpu(&xs->header->xh_count, -1); @@ -974,32 +1243,23 @@ static int ocfs2_xattr_cleanup(struct inode *inode, ret = ocfs2_journal_dirty(handle, xs->xattr_bh); if (ret < 0) mlog_errno(ret); -out_commit: - ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); out: return ret; } static int ocfs2_xattr_update_entry(struct inode *inode, + handle_t *handle, struct ocfs2_xattr_info *xi, struct ocfs2_xattr_search *xs, size_t offs) { - handle_t *handle = NULL; - int ret = 0; + int ret; - handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), - OCFS2_XATTR_BLOCK_UPDATE_CREDITS); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - mlog_errno(ret); - goto out; - } ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } xs->here->xe_name_offset = cpu_to_le16(offs); @@ -1013,8 +1273,6 @@ static int ocfs2_xattr_update_entry(struct inode *inode, ret = ocfs2_journal_dirty(handle, xs->xattr_bh); if (ret < 0) mlog_errno(ret); -out_commit: - ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); out: return ret; } @@ -1027,6 +1285,7 @@ out: static int ocfs2_xattr_set_value_outside(struct inode *inode, struct ocfs2_xattr_info *xi, struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt, size_t offs) { size_t name_len = strlen(xi->name); @@ -1046,18 +1305,18 @@ static int ocfs2_xattr_set_value_outside(struct inode *inode, xv->xr_list.l_next_free_rec = 0; ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, - xi->value_len); + xi->value_len, ctxt); if (ret < 0) { mlog_errno(ret); return ret; } - ret = __ocfs2_xattr_set_value_outside(inode, xv, xi->value, - xi->value_len); + ret = ocfs2_xattr_update_entry(inode, ctxt->handle, xi, xs, offs); if (ret < 0) { mlog_errno(ret); return ret; } - ret = ocfs2_xattr_update_entry(inode, xi, xs, offs); + ret = __ocfs2_xattr_set_value_outside(inode, ctxt->handle, xv, + xi->value, xi->value_len); if (ret < 0) mlog_errno(ret); @@ -1177,6 +1436,7 @@ static void ocfs2_xattr_set_entry_local(struct inode *inode, static int ocfs2_xattr_set_entry(struct inode *inode, struct ocfs2_xattr_info *xi, struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt, int flag) { struct ocfs2_xattr_entry *last; @@ -1184,7 +1444,7 @@ static int ocfs2_xattr_set_entry(struct inode *inode, struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; size_t min_offs = xs->end - xs->base, name_len = strlen(xi->name); size_t size_l = 0; - handle_t *handle = NULL; + handle_t *handle = ctxt->handle; int free, i, ret; struct ocfs2_xattr_info xi_l = { .name_index = xi->name_index, @@ -1205,7 +1465,7 @@ static int ocfs2_xattr_set_entry(struct inode *inode, free = min_offs - ((void *)last - xs->base) - sizeof(__u32); if (free < 0) - return -EFAULT; + return -EIO; if (!xs->not_found) { size_t size = 0; @@ -1247,7 +1507,7 @@ static int ocfs2_xattr_set_entry(struct inode *inode, if (ocfs2_xattr_is_local(xs->here) && size == size_l) { /* Replace existing local xattr with tree root */ ret = ocfs2_xattr_set_value_outside(inode, xi, xs, - offs); + ctxt, offs); if (ret < 0) mlog_errno(ret); goto out; @@ -1266,25 +1526,28 @@ static int ocfs2_xattr_set_entry(struct inode *inode, ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, - xi->value_len); + xi->value_len, + ctxt); if (ret < 0) { mlog_errno(ret); goto out; } - ret = __ocfs2_xattr_set_value_outside(inode, - xv, - xi->value, - xi->value_len); + ret = ocfs2_xattr_update_entry(inode, + handle, + xi, + xs, + offs); if (ret < 0) { mlog_errno(ret); goto out; } - ret = ocfs2_xattr_update_entry(inode, - xi, - xs, - offs); + ret = __ocfs2_xattr_set_value_outside(inode, + handle, + xv, + xi->value, + xi->value_len); if (ret < 0) mlog_errno(ret); goto out; @@ -1294,43 +1557,29 @@ static int ocfs2_xattr_set_entry(struct inode *inode, * just trucate old value to zero. */ ret = ocfs2_xattr_value_truncate(inode, - xs->xattr_bh, - xv, - 0); + xs->xattr_bh, + xv, + 0, + ctxt); if (ret < 0) mlog_errno(ret); } } } - handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), - OCFS2_INODE_UPDATE_CREDITS); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - mlog_errno(ret); - goto out; - } - ret = ocfs2_journal_access(handle, inode, xs->inode_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } if (!(flag & OCFS2_INLINE_XATTR_FL)) { - /*set extended attribue in external blcok*/ - ret = ocfs2_extend_trans(handle, - OCFS2_XATTR_BLOCK_UPDATE_CREDITS); - if (ret) { - mlog_errno(ret); - goto out_commit; - } ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, OCFS2_JOURNAL_ACCESS_WRITE); if (ret) { mlog_errno(ret); - goto out_commit; + goto out; } } @@ -1344,7 +1593,7 @@ static int ocfs2_xattr_set_entry(struct inode *inode, ret = ocfs2_journal_dirty(handle, xs->xattr_bh); if (ret < 0) { mlog_errno(ret); - goto out_commit; + goto out; } } @@ -1381,16 +1630,13 @@ static int ocfs2_xattr_set_entry(struct inode *inode, if (ret < 0) mlog_errno(ret); -out_commit: - ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); - if (!ret && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { /* * Set value outside in B tree. * This is the second step for value size > INLINE_SIZE. */ size_t offs = le16_to_cpu(xs->here->xe_name_offset); - ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs); + ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, offs); if (ret < 0) { int ret2; @@ -1399,59 +1645,14 @@ out_commit: * If set value outside failed, we have to clean * the junk tree root we have already set in local. */ - ret2 = ocfs2_xattr_cleanup(inode, xi, xs, offs); + ret2 = ocfs2_xattr_cleanup(inode, ctxt->handle, + xi, xs, offs); if (ret2 < 0) mlog_errno(ret2); } } out: return ret; - -} - -static int ocfs2_xattr_free_block(handle_t *handle, - struct ocfs2_super *osb, - struct ocfs2_xattr_block *xb) -{ - struct inode *xb_alloc_inode; - struct buffer_head *xb_alloc_bh = NULL; - u64 blk = le64_to_cpu(xb->xb_blkno); - u16 bit = le16_to_cpu(xb->xb_suballoc_bit); - u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit); - int ret = 0; - - xb_alloc_inode = ocfs2_get_system_file_inode(osb, - EXTENT_ALLOC_SYSTEM_INODE, - le16_to_cpu(xb->xb_suballoc_slot)); - if (!xb_alloc_inode) { - ret = -ENOMEM; - mlog_errno(ret); - goto out; - } - mutex_lock(&xb_alloc_inode->i_mutex); - - ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); - if (ret < 0) { - mlog_errno(ret); - goto out_mutex; - } - ret = ocfs2_extend_trans(handle, OCFS2_SUBALLOC_FREE); - if (ret < 0) { - mlog_errno(ret); - goto out_unlock; - } - ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, - bit, bg_blkno, 1); - if (ret < 0) - mlog_errno(ret); -out_unlock: - ocfs2_inode_unlock(xb_alloc_inode, 1); - brelse(xb_alloc_bh); -out_mutex: - mutex_unlock(&xb_alloc_inode->i_mutex); - iput(xb_alloc_inode); -out: - return ret; } static int ocfs2_remove_value_outside(struct inode*inode, @@ -1459,6 +1660,18 @@ static int ocfs2_remove_value_outside(struct inode*inode, struct ocfs2_xattr_header *header) { int ret = 0, i; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; + + ocfs2_init_dealloc_ctxt(&ctxt.dealloc); + + ctxt.handle = ocfs2_start_trans(osb, + ocfs2_remove_extent_credits(osb->sb)); + if (IS_ERR(ctxt.handle)) { + ret = PTR_ERR(ctxt.handle); + mlog_errno(ret); + goto out; + } for (i = 0; i < le16_to_cpu(header->xh_count); i++) { struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; @@ -1471,14 +1684,19 @@ static int ocfs2_remove_value_outside(struct inode*inode, le16_to_cpu(entry->xe_name_offset); xv = (struct ocfs2_xattr_value_root *) (val + OCFS2_XATTR_SIZE(entry->xe_name_len)); - ret = ocfs2_xattr_value_truncate(inode, bh, xv, 0); + ret = ocfs2_xattr_value_truncate(inode, bh, xv, + 0, &ctxt); if (ret < 0) { mlog_errno(ret); - return ret; + break; } } } + ocfs2_commit_trans(osb, ctxt.handle); + ocfs2_schedule_truncate_log_flush(osb, 1); + ocfs2_run_deallocs(osb, &ctxt.dealloc); +out: return ret; } @@ -1503,14 +1721,85 @@ static int ocfs2_xattr_block_remove(struct inode *inode, struct buffer_head *blk_bh) { struct ocfs2_xattr_block *xb; - struct ocfs2_xattr_header *header; int ret = 0; xb = (struct ocfs2_xattr_block *)blk_bh->b_data; - header = &(xb->xb_attrs.xb_header); + if (!(le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED)) { + struct ocfs2_xattr_header *header = &(xb->xb_attrs.xb_header); + ret = ocfs2_remove_value_outside(inode, blk_bh, header); + } else + ret = ocfs2_delete_xattr_index_block(inode, blk_bh); + + return ret; +} + +static int ocfs2_xattr_free_block(struct inode *inode, + u64 block) +{ + struct inode *xb_alloc_inode; + struct buffer_head *xb_alloc_bh = NULL; + struct buffer_head *blk_bh = NULL; + struct ocfs2_xattr_block *xb; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + handle_t *handle; + int ret = 0; + u64 blk, bg_blkno; + u16 bit; + + ret = ocfs2_read_xattr_block(inode, block, &blk_bh); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_xattr_block_remove(inode, blk_bh); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + + xb = (struct ocfs2_xattr_block *)blk_bh->b_data; + blk = le64_to_cpu(xb->xb_blkno); + bit = le16_to_cpu(xb->xb_suballoc_bit); + bg_blkno = ocfs2_which_suballoc_group(blk, bit); + + xb_alloc_inode = ocfs2_get_system_file_inode(osb, + EXTENT_ALLOC_SYSTEM_INODE, + le16_to_cpu(xb->xb_suballoc_slot)); + if (!xb_alloc_inode) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + mutex_lock(&xb_alloc_inode->i_mutex); + + ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1); + if (ret < 0) { + mlog_errno(ret); + goto out_mutex; + } + + handle = ocfs2_start_trans(osb, OCFS2_SUBALLOC_FREE); + if (IS_ERR(handle)) { + ret = PTR_ERR(handle); + mlog_errno(ret); + goto out_unlock; + } - ret = ocfs2_remove_value_outside(inode, blk_bh, header); + ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh, + bit, bg_blkno, 1); + if (ret < 0) + mlog_errno(ret); + ocfs2_commit_trans(osb, handle); +out_unlock: + ocfs2_inode_unlock(xb_alloc_inode, 1); + brelse(xb_alloc_bh); +out_mutex: + mutex_unlock(&xb_alloc_inode->i_mutex); + iput(xb_alloc_inode); +out: + brelse(blk_bh); return ret; } @@ -1521,14 +1810,14 @@ static int ocfs2_xattr_block_remove(struct inode *inode, */ int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) { - struct ocfs2_xattr_block *xb; - struct buffer_head *blk_bh = NULL; - struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); struct ocfs2_inode_info *oi = OCFS2_I(inode); struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; handle_t *handle; int ret; + if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) + return 0; + if (!(oi->ip_dyn_features & OCFS2_HAS_XATTR_FL)) return 0; @@ -1539,22 +1828,10 @@ int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) goto out; } } - if (di->i_xattr_loc) { - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), - le64_to_cpu(di->i_xattr_loc), - &blk_bh, OCFS2_BH_CACHED, inode); - if (ret < 0) { - mlog_errno(ret); - return ret; - } - /*Verify the signature of xattr block*/ - if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, - strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { - ret = -EFAULT; - goto out; - } - ret = ocfs2_xattr_block_remove(inode, blk_bh); + if (di->i_xattr_loc) { + ret = ocfs2_xattr_free_block(inode, + le64_to_cpu(di->i_xattr_loc)); if (ret < 0) { mlog_errno(ret); goto out; @@ -1575,11 +1852,7 @@ int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) goto out_commit; } - if (di->i_xattr_loc) { - xb = (struct ocfs2_xattr_block *)blk_bh->b_data; - ocfs2_xattr_free_block(handle, osb, xb); - di->i_xattr_loc = cpu_to_le64(0); - } + di->i_xattr_loc = 0; spin_lock(&oi->ip_lock); oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); @@ -1592,8 +1865,6 @@ int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) out_commit: ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); out: - brelse(blk_bh); - return ret; } @@ -1682,7 +1953,8 @@ static int ocfs2_xattr_ibody_find(struct inode *inode, */ static int ocfs2_xattr_ibody_set(struct inode *inode, struct ocfs2_xattr_info *xi, - struct ocfs2_xattr_search *xs) + struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt) { struct ocfs2_inode_info *oi = OCFS2_I(inode); struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; @@ -1699,7 +1971,7 @@ static int ocfs2_xattr_ibody_set(struct inode *inode, } } - ret = ocfs2_xattr_set_entry(inode, xi, xs, + ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); out: up_write(&oi->ip_alloc_sem); @@ -1726,19 +1998,12 @@ static int ocfs2_xattr_block_find(struct inode *inode, if (!di->i_xattr_loc) return ret; - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), - le64_to_cpu(di->i_xattr_loc), - &blk_bh, OCFS2_BH_CACHED, inode); + ret = ocfs2_read_xattr_block(inode, le64_to_cpu(di->i_xattr_loc), + &blk_bh); if (ret < 0) { mlog_errno(ret); return ret; } - /*Verify the signature of xattr block*/ - if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE, - strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) { - ret = -EFAULT; - goto cleanup; - } xs->xattr_bh = blk_bh; xb = (struct ocfs2_xattr_block *)blk_bh->b_data; @@ -1775,13 +2040,13 @@ cleanup: */ static int ocfs2_xattr_block_set(struct inode *inode, struct ocfs2_xattr_info *xi, - struct ocfs2_xattr_search *xs) + struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt) { struct buffer_head *new_bh = NULL; struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; - struct ocfs2_alloc_context *meta_ac = NULL; - handle_t *handle = NULL; + handle_t *handle = ctxt->handle; struct ocfs2_xattr_block *xblk = NULL; u16 suballoc_bit_start; u32 num_got; @@ -1789,35 +2054,19 @@ static int ocfs2_xattr_block_set(struct inode *inode, int ret; if (!xs->xattr_bh) { - /* - * Alloc one external block for extended attribute - * outside of inode. - */ - ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac); + ret = ocfs2_journal_access(handle, inode, xs->inode_bh, + OCFS2_JOURNAL_ACCESS_CREATE); if (ret < 0) { mlog_errno(ret); - goto out; - } - handle = ocfs2_start_trans(osb, - OCFS2_XATTR_BLOCK_CREATE_CREDITS); - if (IS_ERR(handle)) { - ret = PTR_ERR(handle); - mlog_errno(ret); - goto out; - } - ret = ocfs2_journal_access(handle, inode, xs->inode_bh, - OCFS2_JOURNAL_ACCESS_CREATE); - if (ret < 0) { - mlog_errno(ret); - goto out_commit; + goto end; } - ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, + ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1, &suballoc_bit_start, &num_got, &first_blkno); if (ret < 0) { mlog_errno(ret); - goto out_commit; + goto end; } new_bh = sb_getblk(inode->i_sb, first_blkno); @@ -1827,7 +2076,7 @@ static int ocfs2_xattr_block_set(struct inode *inode, OCFS2_JOURNAL_ACCESS_CREATE); if (ret < 0) { mlog_errno(ret); - goto out_commit; + goto end; } /* Initialize ocfs2_xattr_block */ @@ -1845,27 +2094,508 @@ static int ocfs2_xattr_block_set(struct inode *inode, xs->end = (void *)xblk + inode->i_sb->s_blocksize; xs->here = xs->header->xh_entries; - ret = ocfs2_journal_dirty(handle, new_bh); if (ret < 0) { mlog_errno(ret); - goto out_commit; + goto end; } di->i_xattr_loc = cpu_to_le64(first_blkno); - ret = ocfs2_journal_dirty(handle, xs->inode_bh); - if (ret < 0) + ocfs2_journal_dirty(handle, xs->inode_bh); + } else + xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; + + if (!(le16_to_cpu(xblk->xb_flags) & OCFS2_XATTR_INDEXED)) { + /* Set extended attribute into external block */ + ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt, + OCFS2_HAS_XATTR_FL); + if (!ret || ret != -ENOSPC) + goto end; + + ret = ocfs2_xattr_create_index_block(inode, xs, ctxt); + if (ret) + goto end; + } + + ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt); + +end: + + return ret; +} + +/* Check whether the new xattr can be inserted into the inode. */ +static int ocfs2_xattr_can_be_in_inode(struct inode *inode, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xs) +{ + u64 value_size; + struct ocfs2_xattr_entry *last; + int free, i; + size_t min_offs = xs->end - xs->base; + + if (!xs->header) + return 0; + + last = xs->header->xh_entries; + + for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { + size_t offs = le16_to_cpu(last->xe_name_offset); + if (offs < min_offs) + min_offs = offs; + last += 1; + } + + free = min_offs - ((void *)last - xs->base) - sizeof(__u32); + if (free < 0) + return 0; + + BUG_ON(!xs->not_found); + + if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) + value_size = OCFS2_XATTR_ROOT_SIZE; + else + value_size = OCFS2_XATTR_SIZE(xi->value_len); + + if (free >= sizeof(struct ocfs2_xattr_entry) + + OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size) + return 1; + + return 0; +} + +static int ocfs2_calc_xattr_set_need(struct inode *inode, + struct ocfs2_dinode *di, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xis, + struct ocfs2_xattr_search *xbs, + int *clusters_need, + int *meta_need, + int *credits_need) +{ + int ret = 0, old_in_xb = 0; + int clusters_add = 0, meta_add = 0, credits = 0; + struct buffer_head *bh = NULL; + struct ocfs2_xattr_block *xb = NULL; + struct ocfs2_xattr_entry *xe = NULL; + struct ocfs2_xattr_value_root *xv = NULL; + char *base = NULL; + int name_offset, name_len = 0; + u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, + xi->value_len); + u64 value_size; + + if (xis->not_found && xbs->not_found) { + credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); + + if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { + clusters_add += new_clusters; + credits += ocfs2_calc_extend_credits(inode->i_sb, + &def_xv.xv.xr_list, + new_clusters); + } + + goto meta_guess; + } + + if (!xis->not_found) { + xe = xis->here; + name_offset = le16_to_cpu(xe->xe_name_offset); + name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); + base = xis->base; + credits += OCFS2_INODE_UPDATE_CREDITS; + } else { + int i, block_off = 0; + xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; + xe = xbs->here; + name_offset = le16_to_cpu(xe->xe_name_offset); + name_len = OCFS2_XATTR_SIZE(xe->xe_name_len); + i = xbs->here - xbs->header->xh_entries; + old_in_xb = 1; + + if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { + ret = ocfs2_xattr_bucket_get_name_value(inode, + bucket_xh(xbs->bucket), + i, &block_off, + &name_offset); + base = bucket_block(xbs->bucket, block_off); + credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); + } else { + base = xbs->base; + credits += OCFS2_XATTR_BLOCK_UPDATE_CREDITS; + } + } + + /* + * delete a xattr doesn't need metadata and cluster allocation. + * so just calculate the credits and return. + * + * The credits for removing the value tree will be extended + * by ocfs2_remove_extent itself. + */ + if (!xi->value) { + if (!ocfs2_xattr_is_local(xe)) + credits += ocfs2_remove_extent_credits(inode->i_sb); + + goto out; + } + + /* do cluster allocation guess first. */ + value_size = le64_to_cpu(xe->xe_value_size); + + if (old_in_xb) { + /* + * In xattr set, we always try to set the xe in inode first, + * so if it can be inserted into inode successfully, the old + * one will be removed from the xattr block, and this xattr + * will be inserted into inode as a new xattr in inode. + */ + if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) { + clusters_add += new_clusters; + credits += ocfs2_remove_extent_credits(inode->i_sb) + + OCFS2_INODE_UPDATE_CREDITS; + if (!ocfs2_xattr_is_local(xe)) + credits += ocfs2_calc_extend_credits( + inode->i_sb, + &def_xv.xv.xr_list, + new_clusters); + goto out; + } + } + + if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { + /* the new values will be stored outside. */ + u32 old_clusters = 0; + + if (!ocfs2_xattr_is_local(xe)) { + old_clusters = ocfs2_clusters_for_bytes(inode->i_sb, + value_size); + xv = (struct ocfs2_xattr_value_root *) + (base + name_offset + name_len); + value_size = OCFS2_XATTR_ROOT_SIZE; + } else + xv = &def_xv.xv; + + if (old_clusters >= new_clusters) { + credits += ocfs2_remove_extent_credits(inode->i_sb); + goto out; + } else { + meta_add += ocfs2_extend_meta_needed(&xv->xr_list); + clusters_add += new_clusters - old_clusters; + credits += ocfs2_calc_extend_credits(inode->i_sb, + &xv->xr_list, + new_clusters - + old_clusters); + if (value_size >= OCFS2_XATTR_ROOT_SIZE) + goto out; + } + } else { + /* + * Now the new value will be stored inside. So if the new + * value is smaller than the size of value root or the old + * value, we don't need any allocation, otherwise we have + * to guess metadata allocation. + */ + if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) || + (!ocfs2_xattr_is_local(xe) && + OCFS2_XATTR_ROOT_SIZE >= xi->value_len)) + goto out; + } + +meta_guess: + /* calculate metadata allocation. */ + if (di->i_xattr_loc) { + if (!xbs->xattr_bh) { + ret = ocfs2_read_xattr_block(inode, + le64_to_cpu(di->i_xattr_loc), + &bh); + if (ret) { + mlog_errno(ret); + goto out; + } + + xb = (struct ocfs2_xattr_block *)bh->b_data; + } else + xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data; + + if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { + struct ocfs2_extent_list *el = + &xb->xb_attrs.xb_root.xt_list; + meta_add += ocfs2_extend_meta_needed(el); + credits += ocfs2_calc_extend_credits(inode->i_sb, + el, 1); + } + + /* + * This cluster will be used either for new bucket or for + * new xattr block. + * If the cluster size is the same as the bucket size, one + * more is needed since we may need to extend the bucket + * also. + */ + clusters_add += 1; + credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); + if (OCFS2_XATTR_BUCKET_SIZE == + OCFS2_SB(inode->i_sb)->s_clustersize) { + credits += ocfs2_blocks_per_xattr_bucket(inode->i_sb); + clusters_add += 1; + } + } else { + meta_add += 1; + credits += OCFS2_XATTR_BLOCK_CREATE_CREDITS; + } +out: + if (clusters_need) + *clusters_need = clusters_add; + if (meta_need) + *meta_need = meta_add; + if (credits_need) + *credits_need = credits; + brelse(bh); + return ret; +} + +static int ocfs2_init_xattr_set_ctxt(struct inode *inode, + struct ocfs2_dinode *di, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xis, + struct ocfs2_xattr_search *xbs, + struct ocfs2_xattr_set_ctxt *ctxt, + int *credits) +{ + int clusters_add, meta_add, ret; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt)); + + ocfs2_init_dealloc_ctxt(&ctxt->dealloc); + + ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs, + &clusters_add, &meta_add, credits); + if (ret) { + mlog_errno(ret); + return ret; + } + + mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d, " + "credits = %d\n", xi->name, meta_add, clusters_add, *credits); + + if (meta_add) { + ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add, + &ctxt->meta_ac); + if (ret) { mlog_errno(ret); -out_commit: - ocfs2_commit_trans(osb, handle); + goto out; + } + } + + if (clusters_add) { + ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac); + if (ret) + mlog_errno(ret); + } out: - if (meta_ac) - ocfs2_free_alloc_context(meta_ac); - if (ret < 0) - return ret; + if (ret) { + if (ctxt->meta_ac) { + ocfs2_free_alloc_context(ctxt->meta_ac); + ctxt->meta_ac = NULL; + } + + /* + * We cannot have an error and a non null ctxt->data_ac. + */ + } + + return ret; +} + +static int __ocfs2_xattr_set_handle(struct inode *inode, + struct ocfs2_dinode *di, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xis, + struct ocfs2_xattr_search *xbs, + struct ocfs2_xattr_set_ctxt *ctxt) +{ + int ret = 0, credits, old_found; + + if (!xi->value) { + /* Remove existing extended attribute */ + if (!xis->not_found) + ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); + else if (!xbs->not_found) + ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); + } else { + /* We always try to set extended attribute into inode first*/ + ret = ocfs2_xattr_ibody_set(inode, xi, xis, ctxt); + if (!ret && !xbs->not_found) { + /* + * If succeed and that extended attribute existing in + * external block, then we will remove it. + */ + xi->value = NULL; + xi->value_len = 0; + + old_found = xis->not_found; + xis->not_found = -ENODATA; + ret = ocfs2_calc_xattr_set_need(inode, + di, + xi, + xis, + xbs, + NULL, + NULL, + &credits); + xis->not_found = old_found; + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_extend_trans(ctxt->handle, credits + + ctxt->handle->h_buffer_credits); + if (ret) { + mlog_errno(ret); + goto out; + } + ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); + } else if (ret == -ENOSPC) { + if (di->i_xattr_loc && !xbs->xattr_bh) { + ret = ocfs2_xattr_block_find(inode, + xi->name_index, + xi->name, xbs); + if (ret) + goto out; + + old_found = xis->not_found; + xis->not_found = -ENODATA; + ret = ocfs2_calc_xattr_set_need(inode, + di, + xi, + xis, + xbs, + NULL, + NULL, + &credits); + xis->not_found = old_found; + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_extend_trans(ctxt->handle, credits + + ctxt->handle->h_buffer_credits); + if (ret) { + mlog_errno(ret); + goto out; + } + } + /* + * If no space in inode, we will set extended attribute + * into external block. + */ + ret = ocfs2_xattr_block_set(inode, xi, xbs, ctxt); + if (ret) + goto out; + if (!xis->not_found) { + /* + * If succeed and that extended attribute + * existing in inode, we will remove it. + */ + xi->value = NULL; + xi->value_len = 0; + xbs->not_found = -ENODATA; + ret = ocfs2_calc_xattr_set_need(inode, + di, + xi, + xis, + xbs, + NULL, + NULL, + &credits); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_extend_trans(ctxt->handle, credits + + ctxt->handle->h_buffer_credits); + if (ret) { + mlog_errno(ret); + goto out; + } + ret = ocfs2_xattr_ibody_set(inode, xi, + xis, ctxt); + } + } + } + +out: + return ret; +} + +/* + * This function only called duing creating inode + * for init security/acl xattrs of the new inode. + * The xattrs could be put into ibody or extent block, + * xattr bucket would not be use in this case. + * transanction credits also be reserved in here. + */ +int ocfs2_xattr_set_handle(handle_t *handle, + struct inode *inode, + struct buffer_head *di_bh, + int name_index, + const char *name, + const void *value, + size_t value_len, + int flags, + struct ocfs2_alloc_context *meta_ac, + struct ocfs2_alloc_context *data_ac) +{ + struct ocfs2_dinode *di; + int ret; + + struct ocfs2_xattr_info xi = { + .name_index = name_index, + .name = name, + .value = value, + .value_len = value_len, + }; + + struct ocfs2_xattr_search xis = { + .not_found = -ENODATA, + }; + + struct ocfs2_xattr_search xbs = { + .not_found = -ENODATA, + }; + + struct ocfs2_xattr_set_ctxt ctxt = { + .handle = handle, + .meta_ac = meta_ac, + .data_ac = data_ac, + }; + + if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) + return -EOPNOTSUPP; + + xis.inode_bh = xbs.inode_bh = di_bh; + di = (struct ocfs2_dinode *)di_bh->b_data; + + down_write(&OCFS2_I(inode)->ip_xattr_sem); + + ret = ocfs2_xattr_ibody_find(inode, name_index, name, &xis); + if (ret) + goto cleanup; + if (xis.not_found) { + ret = ocfs2_xattr_block_find(inode, name_index, name, &xbs); + if (ret) + goto cleanup; } - /* Set extended attribute into external block */ - ret = ocfs2_xattr_set_entry(inode, xi, xs, OCFS2_HAS_XATTR_FL); + ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); + +cleanup: + up_write(&OCFS2_I(inode)->ip_xattr_sem); + brelse(xbs.xattr_bh); return ret; } @@ -1886,7 +2616,10 @@ int ocfs2_xattr_set(struct inode *inode, { struct buffer_head *di_bh = NULL; struct ocfs2_dinode *di; - int ret; + int ret, credits; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct inode *tl_inode = osb->osb_tl_inode; + struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, }; struct ocfs2_xattr_info xi = { .name_index = name_index, @@ -1903,10 +2636,23 @@ int ocfs2_xattr_set(struct inode *inode, .not_found = -ENODATA, }; + if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) + return -EOPNOTSUPP; + + /* + * Only xbs will be used on indexed trees. xis doesn't need a + * bucket. + */ + xbs.bucket = ocfs2_xattr_bucket_new(inode); + if (!xbs.bucket) { + mlog_errno(-ENOMEM); + return -ENOMEM; + } + ret = ocfs2_inode_lock(inode, &di_bh, 1); if (ret < 0) { mlog_errno(ret); - return ret; + goto cleanup_nolock; } xis.inode_bh = xbs.inode_bh = di_bh; di = (struct ocfs2_dinode *)di_bh->b_data; @@ -1938,69 +2684,55 @@ int ocfs2_xattr_set(struct inode *inode, goto cleanup; } - if (!value) { - /* Remove existing extended attribute */ - if (!xis.not_found) - ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); - else if (!xbs.not_found) - ret = ocfs2_xattr_block_set(inode, &xi, &xbs); - } else { - /* We always try to set extended attribute into inode first*/ - ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); - if (!ret && !xbs.not_found) { - /* - * If succeed and that extended attribute existing in - * external block, then we will remove it. - */ - xi.value = NULL; - xi.value_len = 0; - ret = ocfs2_xattr_block_set(inode, &xi, &xbs); - } else if (ret == -ENOSPC) { - if (di->i_xattr_loc && !xbs.xattr_bh) { - ret = ocfs2_xattr_block_find(inode, name_index, - name, &xbs); - if (ret) - goto cleanup; - } - /* - * If no space in inode, we will set extended attribute - * into external block. - */ - ret = ocfs2_xattr_block_set(inode, &xi, &xbs); - if (ret) - goto cleanup; - if (!xis.not_found) { - /* - * If succeed and that extended attribute - * existing in inode, we will remove it. - */ - xi.value = NULL; - xi.value_len = 0; - ret = ocfs2_xattr_ibody_set(inode, &xi, &xis); - } + + mutex_lock(&tl_inode->i_mutex); + + if (ocfs2_truncate_log_needs_flush(osb)) { + ret = __ocfs2_flush_truncate_log(osb); + if (ret < 0) { + mutex_unlock(&tl_inode->i_mutex); + mlog_errno(ret); + goto cleanup; } } + mutex_unlock(&tl_inode->i_mutex); + + ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, + &xbs, &ctxt, &credits); + if (ret) { + mlog_errno(ret); + goto cleanup; + } + + ctxt.handle = ocfs2_start_trans(osb, credits); + if (IS_ERR(ctxt.handle)) { + ret = PTR_ERR(ctxt.handle); + mlog_errno(ret); + goto cleanup; + } + + ret = __ocfs2_xattr_set_handle(inode, di, &xi, &xis, &xbs, &ctxt); + + ocfs2_commit_trans(osb, ctxt.handle); + + if (ctxt.data_ac) + ocfs2_free_alloc_context(ctxt.data_ac); + if (ctxt.meta_ac) + ocfs2_free_alloc_context(ctxt.meta_ac); + if (ocfs2_dealloc_has_cluster(&ctxt.dealloc)) + ocfs2_schedule_truncate_log_flush(osb, 1); + ocfs2_run_deallocs(osb, &ctxt.dealloc); cleanup: up_write(&OCFS2_I(inode)->ip_xattr_sem); ocfs2_inode_unlock(inode, 1); +cleanup_nolock: brelse(di_bh); brelse(xbs.xattr_bh); + ocfs2_xattr_bucket_free(xbs.bucket); return ret; } -static inline u32 ocfs2_xattr_hash_by_name(struct inode *inode, - int name_index, - const char *suffix_name) -{ - struct xattr_handler *handler = ocfs2_xattr_handler(name_index); - char *prefix = handler->prefix; - int prefix_len = strlen(handler->prefix); - - return ocfs2_xattr_name_hash(inode, prefix, prefix_len, - (char *)suffix_name, strlen(suffix_name)); -} - /* * Find the xattr extent rec which may contains name_hash. * e_cpos will be the first name hash of the xattr rec. @@ -2071,7 +2803,7 @@ typedef int (xattr_bucket_func)(struct inode *inode, void *para); static int ocfs2_find_xe_in_bucket(struct inode *inode, - struct buffer_head *header_bh, + struct ocfs2_xattr_bucket *bucket, int name_index, const char *name, u32 name_hash, @@ -2079,11 +2811,9 @@ static int ocfs2_find_xe_in_bucket(struct inode *inode, int *found) { int i, ret = 0, cmp = 1, block_off, new_offset; - struct ocfs2_xattr_header *xh = - (struct ocfs2_xattr_header *)header_bh->b_data; + struct ocfs2_xattr_header *xh = bucket_xh(bucket); size_t name_len = strlen(name); struct ocfs2_xattr_entry *xe = NULL; - struct buffer_head *name_bh = NULL; char *xe_name; /* @@ -2114,20 +2844,9 @@ static int ocfs2_find_xe_in_bucket(struct inode *inode, break; } - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), - header_bh->b_blocknr + block_off, - &name_bh, OCFS2_BH_CACHED, inode); - if (ret) { - mlog_errno(ret); - break; - } - xe_name = name_bh->b_data + new_offset; - - cmp = memcmp(name, xe_name, name_len); - brelse(name_bh); - name_bh = NULL; - if (cmp == 0) { + xe_name = bucket_block(bucket, block_off) + new_offset; + if (!memcmp(name, xe_name, name_len)) { *xe_index = i; *found = 1; ret = 0; @@ -2157,41 +2876,42 @@ static int ocfs2_xattr_bucket_find(struct inode *inode, struct ocfs2_xattr_search *xs) { int ret, found = 0; - struct buffer_head *bh = NULL; - struct buffer_head *lower_bh = NULL; struct ocfs2_xattr_header *xh = NULL; struct ocfs2_xattr_entry *xe = NULL; u16 index = 0; u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); int low_bucket = 0, bucket, high_bucket; + struct ocfs2_xattr_bucket *search; u32 last_hash; - u64 blkno; + u64 blkno, lower_blkno = 0; + + search = ocfs2_xattr_bucket_new(inode); + if (!search) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, - &bh, OCFS2_BH_CACHED, inode); + ret = ocfs2_read_xattr_bucket(search, p_blkno); if (ret) { mlog_errno(ret); goto out; } - xh = (struct ocfs2_xattr_header *)bh->b_data; + xh = bucket_xh(search); high_bucket = le16_to_cpu(xh->xh_num_buckets) - 1; - while (low_bucket <= high_bucket) { - brelse(bh); - bh = NULL; - bucket = (low_bucket + high_bucket) / 2; + ocfs2_xattr_bucket_relse(search); + bucket = (low_bucket + high_bucket) / 2; blkno = p_blkno + bucket * blk_per_bucket; - - ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno, - &bh, OCFS2_BH_CACHED, inode); + ret = ocfs2_read_xattr_bucket(search, blkno); if (ret) { mlog_errno(ret); goto out; } - xh = (struct ocfs2_xattr_header *)bh->b_data; + xh = bucket_xh(search); xe = &xh->xh_entries[0]; if (name_hash < le32_to_cpu(xe->xe_name_hash)) { high_bucket = bucket - 1; @@ -2200,15 +2920,16 @@ static int ocfs2_xattr_bucket_find(struct inode *inode, /* * Check whether the hash of the last entry in our - * bucket is larger than the search one. + * bucket is larger than the search one. for an empty + * bucket, the last one is also the first one. */ - xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; + if (xh->xh_count) + xe = &xh->xh_entries[le16_to_cpu(xh->xh_count) - 1]; + last_hash = le32_to_cpu(xe->xe_name_hash); - /* record lower_bh which may be the insert place. */ - brelse(lower_bh); - lower_bh = bh; - bh = NULL; + /* record lower_blkno which may be the insert place. */ + lower_blkno = blkno; if (name_hash > le32_to_cpu(xe->xe_name_hash)) { low_bucket = bucket + 1; @@ -2216,7 +2937,7 @@ static int ocfs2_xattr_bucket_find(struct inode *inode, } /* the searched xattr should reside in this bucket if exists. */ - ret = ocfs2_find_xe_in_bucket(inode, lower_bh, + ret = ocfs2_find_xe_in_bucket(inode, search, name_index, name, name_hash, &index, &found); if (ret) { @@ -2231,47 +2952,29 @@ static int ocfs2_xattr_bucket_find(struct inode *inode, * When the xattr's hash value is in the gap of 2 buckets, we will * always set it to the previous bucket. */ - if (!lower_bh) { - /* - * We can't find any bucket whose first name_hash is less - * than the find name_hash. - */ - BUG_ON(bh->b_blocknr != p_blkno); - lower_bh = bh; - bh = NULL; + if (!lower_blkno) + lower_blkno = p_blkno; + + /* This should be in cache - we just read it during the search */ + ret = ocfs2_read_xattr_bucket(xs->bucket, lower_blkno); + if (ret) { + mlog_errno(ret); + goto out; } - xs->bucket.bhs[0] = lower_bh; - xs->bucket.xh = (struct ocfs2_xattr_header *) - xs->bucket.bhs[0]->b_data; - lower_bh = NULL; - xs->header = xs->bucket.xh; - xs->base = xs->bucket.bhs[0]->b_data; + xs->header = bucket_xh(xs->bucket); + xs->base = bucket_block(xs->bucket, 0); xs->end = xs->base + inode->i_sb->s_blocksize; if (found) { - /* - * If we have found the xattr enty, read all the blocks in - * this bucket. - */ - ret = ocfs2_read_blocks(OCFS2_SB(inode->i_sb), - xs->bucket.bhs[0]->b_blocknr + 1, - blk_per_bucket - 1, &xs->bucket.bhs[1], - OCFS2_BH_CACHED, inode); - if (ret) { - mlog_errno(ret); - goto out; - } - xs->here = &xs->header->xh_entries[index]; mlog(0, "find xattr %s in bucket %llu, entry = %u\n", name, - (unsigned long long)xs->bucket.bhs[0]->b_blocknr, index); + (unsigned long long)bucket_blkno(xs->bucket), index); } else ret = -ENODATA; out: - brelse(bh); - brelse(lower_bh); + ocfs2_xattr_bucket_free(search); return ret; } @@ -2288,7 +2991,7 @@ static int ocfs2_xattr_index_block_find(struct inode *inode, struct ocfs2_extent_list *el = &xb_root->xt_list; u64 p_blkno = 0; u32 first_hash, num_clusters = 0; - u32 name_hash = ocfs2_xattr_hash_by_name(inode, name_index, name); + u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); if (le16_to_cpu(el->l_next_free_rec) == 0) return -ENODATA; @@ -2306,7 +3009,8 @@ static int ocfs2_xattr_index_block_find(struct inode *inode, BUG_ON(p_blkno == 0 || num_clusters == 0 || first_hash > name_hash); mlog(0, "find xattr extent rec %u clusters from %llu, the first hash " - "in the rec is %u\n", num_clusters, p_blkno, first_hash); + "in the rec is %u\n", num_clusters, (unsigned long long)p_blkno, + first_hash); ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, p_blkno, first_hash, num_clusters, xs); @@ -2321,58 +3025,57 @@ static int ocfs2_iterate_xattr_buckets(struct inode *inode, xattr_bucket_func *func, void *para) { - int i, j, ret = 0; - int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); + int i, ret = 0; u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); u32 num_buckets = clusters * bpc; - struct ocfs2_xattr_bucket bucket; + struct ocfs2_xattr_bucket *bucket; - memset(&bucket, 0, sizeof(bucket)); + bucket = ocfs2_xattr_bucket_new(inode); + if (!bucket) { + mlog_errno(-ENOMEM); + return -ENOMEM; + } mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", - clusters, blkno); + clusters, (unsigned long long)blkno); - for (i = 0; i < num_buckets; i++, blkno += blk_per_bucket) { - ret = ocfs2_read_blocks(OCFS2_SB(inode->i_sb), - blkno, blk_per_bucket, - bucket.bhs, OCFS2_BH_CACHED, inode); + for (i = 0; i < num_buckets; i++, blkno += bucket->bu_blocks) { + ret = ocfs2_read_xattr_bucket(bucket, blkno); if (ret) { mlog_errno(ret); - goto out; + break; } - bucket.xh = (struct ocfs2_xattr_header *)bucket.bhs[0]->b_data; /* * The real bucket num in this series of blocks is stored * in the 1st bucket. */ if (i == 0) - num_buckets = le16_to_cpu(bucket.xh->xh_num_buckets); + num_buckets = le16_to_cpu(bucket_xh(bucket)->xh_num_buckets); - mlog(0, "iterating xattr bucket %llu\n", blkno); + mlog(0, "iterating xattr bucket %llu, first hash %u\n", + (unsigned long long)blkno, + le32_to_cpu(bucket_xh(bucket)->xh_entries[0].xe_name_hash)); if (func) { - ret = func(inode, &bucket, para); - if (ret) { + ret = func(inode, bucket, para); + if (ret) mlog_errno(ret); - break; - } + /* Fall through to bucket_relse() */ } - for (j = 0; j < blk_per_bucket; j++) - brelse(bucket.bhs[j]); - memset(&bucket, 0, sizeof(bucket)); + ocfs2_xattr_bucket_relse(bucket); + if (ret) + break; } -out: - for (j = 0; j < blk_per_bucket; j++) - brelse(bucket.bhs[j]); - + ocfs2_xattr_bucket_free(bucket); return ret; } struct ocfs2_xattr_tree_list { char *buffer; size_t buffer_size; + size_t result; }; static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, @@ -2398,34 +3101,34 @@ static int ocfs2_list_xattr_bucket(struct inode *inode, struct ocfs2_xattr_bucket *bucket, void *para) { - int ret = 0; + int ret = 0, type; struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; - size_t size; int i, block_off, new_offset; + const char *prefix, *name; - for (i = 0 ; i < le16_to_cpu(bucket->xh->xh_count); i++) { - struct ocfs2_xattr_entry *entry = &bucket->xh->xh_entries[i]; - struct xattr_handler *handler = - ocfs2_xattr_handler(ocfs2_xattr_get_type(entry)); + for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) { + struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i]; + type = ocfs2_xattr_get_type(entry); + prefix = ocfs2_xattr_prefix(type); - if (handler) { + if (prefix) { ret = ocfs2_xattr_bucket_get_name_value(inode, - bucket->xh, + bucket_xh(bucket), i, &block_off, &new_offset); if (ret) break; - size = handler->list(inode, xl->buffer, xl->buffer_size, - bucket->bhs[block_off]->b_data + - new_offset, - entry->xe_name_len); - if (xl->buffer) { - if (size > xl->buffer_size) - return -ERANGE; - xl->buffer += size; - } - xl->buffer_size -= size; + + name = (const char *)bucket_block(bucket, block_off) + + new_offset; + ret = ocfs2_xattr_list_entry(xl->buffer, + xl->buffer_size, + &xl->result, + prefix, name, + entry->xe_name_len); + if (ret) + break; } } @@ -2444,6 +3147,7 @@ static int ocfs2_xattr_tree_list_index_block(struct inode *inode, struct ocfs2_xattr_tree_list xl = { .buffer = buffer, .buffer_size = buffer_size, + .result = 0, }; if (le16_to_cpu(el->l_next_free_rec) == 0) @@ -2471,7 +3175,2217 @@ static int ocfs2_xattr_tree_list_index_block(struct inode *inode, name_hash = e_cpos - 1; } - ret = buffer_size - xl.buffer_size; + ret = xl.result; +out: + return ret; +} + +static int cmp_xe(const void *a, const void *b) +{ + const struct ocfs2_xattr_entry *l = a, *r = b; + u32 l_hash = le32_to_cpu(l->xe_name_hash); + u32 r_hash = le32_to_cpu(r->xe_name_hash); + + if (l_hash > r_hash) + return 1; + if (l_hash < r_hash) + return -1; + return 0; +} + +static void swap_xe(void *a, void *b, int size) +{ + struct ocfs2_xattr_entry *l = a, *r = b, tmp; + + tmp = *l; + memcpy(l, r, sizeof(struct ocfs2_xattr_entry)); + memcpy(r, &tmp, sizeof(struct ocfs2_xattr_entry)); +} + +/* + * When the ocfs2_xattr_block is filled up, new bucket will be created + * and all the xattr entries will be moved to the new bucket. + * The header goes at the start of the bucket, and the names+values are + * filled from the end. This is why *target starts as the last buffer. + * Note: we need to sort the entries since they are not saved in order + * in the ocfs2_xattr_block. + */ +static void ocfs2_cp_xattr_block_to_bucket(struct inode *inode, + struct buffer_head *xb_bh, + struct ocfs2_xattr_bucket *bucket) +{ + int i, blocksize = inode->i_sb->s_blocksize; + int blks = ocfs2_blocks_per_xattr_bucket(inode->i_sb); + u16 offset, size, off_change; + struct ocfs2_xattr_entry *xe; + struct ocfs2_xattr_block *xb = + (struct ocfs2_xattr_block *)xb_bh->b_data; + struct ocfs2_xattr_header *xb_xh = &xb->xb_attrs.xb_header; + struct ocfs2_xattr_header *xh = bucket_xh(bucket); + u16 count = le16_to_cpu(xb_xh->xh_count); + char *src = xb_bh->b_data; + char *target = bucket_block(bucket, blks - 1); + + mlog(0, "cp xattr from block %llu to bucket %llu\n", + (unsigned long long)xb_bh->b_blocknr, + (unsigned long long)bucket_blkno(bucket)); + + for (i = 0; i < blks; i++) + memset(bucket_block(bucket, i), 0, blocksize); + + /* + * Since the xe_name_offset is based on ocfs2_xattr_header, + * there is a offset change corresponding to the change of + * ocfs2_xattr_header's position. + */ + off_change = offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); + xe = &xb_xh->xh_entries[count - 1]; + offset = le16_to_cpu(xe->xe_name_offset) + off_change; + size = blocksize - offset; + + /* copy all the names and values. */ + memcpy(target + offset, src + offset, size); + + /* Init new header now. */ + xh->xh_count = xb_xh->xh_count; + xh->xh_num_buckets = cpu_to_le16(1); + xh->xh_name_value_len = cpu_to_le16(size); + xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE - size); + + /* copy all the entries. */ + target = bucket_block(bucket, 0); + offset = offsetof(struct ocfs2_xattr_header, xh_entries); + size = count * sizeof(struct ocfs2_xattr_entry); + memcpy(target + offset, (char *)xb_xh + offset, size); + + /* Change the xe offset for all the xe because of the move. */ + off_change = OCFS2_XATTR_BUCKET_SIZE - blocksize + + offsetof(struct ocfs2_xattr_block, xb_attrs.xb_header); + for (i = 0; i < count; i++) + le16_add_cpu(&xh->xh_entries[i].xe_name_offset, off_change); + + mlog(0, "copy entry: start = %u, size = %u, offset_change = %u\n", + offset, size, off_change); + + sort(target + offset, count, sizeof(struct ocfs2_xattr_entry), + cmp_xe, swap_xe); +} + +/* + * After we move xattr from block to index btree, we have to + * update ocfs2_xattr_search to the new xe and base. + * + * When the entry is in xattr block, xattr_bh indicates the storage place. + * While if the entry is in index b-tree, "bucket" indicates the + * real place of the xattr. + */ +static void ocfs2_xattr_update_xattr_search(struct inode *inode, + struct ocfs2_xattr_search *xs, + struct buffer_head *old_bh) +{ + char *buf = old_bh->b_data; + struct ocfs2_xattr_block *old_xb = (struct ocfs2_xattr_block *)buf; + struct ocfs2_xattr_header *old_xh = &old_xb->xb_attrs.xb_header; + int i; + + xs->header = bucket_xh(xs->bucket); + xs->base = bucket_block(xs->bucket, 0); + xs->end = xs->base + inode->i_sb->s_blocksize; + + if (xs->not_found) + return; + + i = xs->here - old_xh->xh_entries; + xs->here = &xs->header->xh_entries[i]; +} + +static int ocfs2_xattr_create_index_block(struct inode *inode, + struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt) +{ + int ret; + u32 bit_off, len; + u64 blkno; + handle_t *handle = ctxt->handle; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_inode_info *oi = OCFS2_I(inode); + struct buffer_head *xb_bh = xs->xattr_bh; + struct ocfs2_xattr_block *xb = + (struct ocfs2_xattr_block *)xb_bh->b_data; + struct ocfs2_xattr_tree_root *xr; + u16 xb_flags = le16_to_cpu(xb->xb_flags); + + mlog(0, "create xattr index block for %llu\n", + (unsigned long long)xb_bh->b_blocknr); + + BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); + BUG_ON(!xs->bucket); + + /* + * XXX: + * We can use this lock for now, and maybe move to a dedicated mutex + * if performance becomes a problem later. + */ + down_write(&oi->ip_alloc_sem); + + ret = ocfs2_journal_access(handle, inode, xb_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, + 1, 1, &bit_off, &len); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* + * The bucket may spread in many blocks, and + * we will only touch the 1st block and the last block + * in the whole bucket(one for entry and one for data). + */ + blkno = ocfs2_clusters_to_blocks(inode->i_sb, bit_off); + + mlog(0, "allocate 1 cluster from %llu to xattr block\n", + (unsigned long long)blkno); + + ret = ocfs2_init_xattr_bucket(xs->bucket, blkno); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, + OCFS2_JOURNAL_ACCESS_CREATE); + if (ret) { + mlog_errno(ret); + goto out; + } + + ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xs->bucket); + ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); + + ocfs2_xattr_update_xattr_search(inode, xs, xb_bh); + + /* Change from ocfs2_xattr_header to ocfs2_xattr_tree_root */ + memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - + offsetof(struct ocfs2_xattr_block, xb_attrs)); + + xr = &xb->xb_attrs.xb_root; + xr->xt_clusters = cpu_to_le32(1); + xr->xt_last_eb_blk = 0; + xr->xt_list.l_tree_depth = 0; + xr->xt_list.l_count = cpu_to_le16(ocfs2_xattr_recs_per_xb(inode->i_sb)); + xr->xt_list.l_next_free_rec = cpu_to_le16(1); + + xr->xt_list.l_recs[0].e_cpos = 0; + xr->xt_list.l_recs[0].e_blkno = cpu_to_le64(blkno); + xr->xt_list.l_recs[0].e_leaf_clusters = cpu_to_le16(1); + + xb->xb_flags = cpu_to_le16(xb_flags | OCFS2_XATTR_INDEXED); + + ocfs2_journal_dirty(handle, xb_bh); + +out: + up_write(&oi->ip_alloc_sem); + + return ret; +} + +static int cmp_xe_offset(const void *a, const void *b) +{ + const struct ocfs2_xattr_entry *l = a, *r = b; + u32 l_name_offset = le16_to_cpu(l->xe_name_offset); + u32 r_name_offset = le16_to_cpu(r->xe_name_offset); + + if (l_name_offset < r_name_offset) + return 1; + if (l_name_offset > r_name_offset) + return -1; + return 0; +} + +/* + * defrag a xattr bucket if we find that the bucket has some + * holes beteen name/value pairs. + * We will move all the name/value pairs to the end of the bucket + * so that we can spare some space for insertion. + */ +static int ocfs2_defrag_xattr_bucket(struct inode *inode, + handle_t *handle, + struct ocfs2_xattr_bucket *bucket) +{ + int ret, i; + size_t end, offset, len, value_len; + struct ocfs2_xattr_header *xh; + char *entries, *buf, *bucket_buf = NULL; + u64 blkno = bucket_blkno(bucket); + u16 xh_free_start; + size_t blocksize = inode->i_sb->s_blocksize; + struct ocfs2_xattr_entry *xe; + + /* + * In order to make the operation more efficient and generic, + * we copy all the blocks into a contiguous memory and do the + * defragment there, so if anything is error, we will not touch + * the real block. + */ + bucket_buf = kmalloc(OCFS2_XATTR_BUCKET_SIZE, GFP_NOFS); + if (!bucket_buf) { + ret = -EIO; + goto out; + } + + buf = bucket_buf; + for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) + memcpy(buf, bucket_block(bucket, i), blocksize); + + ret = ocfs2_xattr_bucket_journal_access(handle, bucket, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + + xh = (struct ocfs2_xattr_header *)bucket_buf; + entries = (char *)xh->xh_entries; + xh_free_start = le16_to_cpu(xh->xh_free_start); + + mlog(0, "adjust xattr bucket in %llu, count = %u, " + "xh_free_start = %u, xh_name_value_len = %u.\n", + (unsigned long long)blkno, le16_to_cpu(xh->xh_count), + xh_free_start, le16_to_cpu(xh->xh_name_value_len)); + + /* + * sort all the entries by their offset. + * the largest will be the first, so that we can + * move them to the end one by one. + */ + sort(entries, le16_to_cpu(xh->xh_count), + sizeof(struct ocfs2_xattr_entry), + cmp_xe_offset, swap_xe); + + /* Move all name/values to the end of the bucket. */ + xe = xh->xh_entries; + end = OCFS2_XATTR_BUCKET_SIZE; + for (i = 0; i < le16_to_cpu(xh->xh_count); i++, xe++) { + offset = le16_to_cpu(xe->xe_name_offset); + if (ocfs2_xattr_is_local(xe)) + value_len = OCFS2_XATTR_SIZE( + le64_to_cpu(xe->xe_value_size)); + else + value_len = OCFS2_XATTR_ROOT_SIZE; + len = OCFS2_XATTR_SIZE(xe->xe_name_len) + value_len; + + /* + * We must make sure that the name/value pair + * exist in the same block. So adjust end to + * the previous block end if needed. + */ + if (((end - len) / blocksize != + (end - 1) / blocksize)) + end = end - end % blocksize; + + if (end > offset + len) { + memmove(bucket_buf + end - len, + bucket_buf + offset, len); + xe->xe_name_offset = cpu_to_le16(end - len); + } + + mlog_bug_on_msg(end < offset + len, "Defrag check failed for " + "bucket %llu\n", (unsigned long long)blkno); + + end -= len; + } + + mlog_bug_on_msg(xh_free_start > end, "Defrag check failed for " + "bucket %llu\n", (unsigned long long)blkno); + + if (xh_free_start == end) + goto out; + + memset(bucket_buf + xh_free_start, 0, end - xh_free_start); + xh->xh_free_start = cpu_to_le16(end); + + /* sort the entries by their name_hash. */ + sort(entries, le16_to_cpu(xh->xh_count), + sizeof(struct ocfs2_xattr_entry), + cmp_xe, swap_xe); + + buf = bucket_buf; + for (i = 0; i < bucket->bu_blocks; i++, buf += blocksize) + memcpy(bucket_block(bucket, i), buf, blocksize); + ocfs2_xattr_bucket_journal_dirty(handle, bucket); + out: + kfree(bucket_buf); return ret; } + +/* + * Move half nums of the xattr bucket in the previous cluster to this new + * cluster. We only touch the last cluster of the previous extend record. + * + * first_bh is the first buffer_head of a series of bucket in the same + * extent rec and header_bh is the header of one bucket in this cluster. + * They will be updated if we move the data header_bh contains to the new + * cluster. first_hash will be set as the 1st xe's name_hash of the new cluster. + */ +static int ocfs2_mv_xattr_bucket_cross_cluster(struct inode *inode, + handle_t *handle, + struct buffer_head **first_bh, + struct buffer_head **header_bh, + u64 new_blkno, + u64 prev_blkno, + u32 num_clusters, + u32 *first_hash) +{ + int i, ret, credits; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); + int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); + int blocksize = inode->i_sb->s_blocksize; + struct buffer_head *old_bh, *new_bh, *prev_bh, *new_first_bh = NULL; + struct ocfs2_xattr_header *new_xh; + struct ocfs2_xattr_header *xh = + (struct ocfs2_xattr_header *)((*first_bh)->b_data); + + BUG_ON(le16_to_cpu(xh->xh_num_buckets) < num_buckets); + BUG_ON(OCFS2_XATTR_BUCKET_SIZE == osb->s_clustersize); + + prev_bh = *first_bh; + get_bh(prev_bh); + xh = (struct ocfs2_xattr_header *)prev_bh->b_data; + + prev_blkno += (num_clusters - 1) * bpc + bpc / 2; + + mlog(0, "move half of xattrs in cluster %llu to %llu\n", + (unsigned long long)prev_blkno, (unsigned long long)new_blkno); + + /* + * We need to update the 1st half of the new cluster and + * 1 more for the update of the 1st bucket of the previous + * extent record. + */ + credits = bpc / 2 + 1 + handle->h_buffer_credits; + ret = ocfs2_extend_trans(handle, credits); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_journal_access(handle, inode, prev_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + for (i = 0; i < bpc / 2; i++, prev_blkno++, new_blkno++) { + old_bh = new_bh = NULL; + new_bh = sb_getblk(inode->i_sb, new_blkno); + if (!new_bh) { + ret = -EIO; + mlog_errno(ret); + goto out; + } + + ocfs2_set_new_buffer_uptodate(inode, new_bh); + + ret = ocfs2_journal_access(handle, inode, new_bh, + OCFS2_JOURNAL_ACCESS_CREATE); + if (ret < 0) { + mlog_errno(ret); + brelse(new_bh); + goto out; + } + + ret = ocfs2_read_block(inode, prev_blkno, &old_bh, NULL); + if (ret < 0) { + mlog_errno(ret); + brelse(new_bh); + goto out; + } + + memcpy(new_bh->b_data, old_bh->b_data, blocksize); + + if (i == 0) { + new_xh = (struct ocfs2_xattr_header *)new_bh->b_data; + new_xh->xh_num_buckets = cpu_to_le16(num_buckets / 2); + + if (first_hash) + *first_hash = le32_to_cpu( + new_xh->xh_entries[0].xe_name_hash); + new_first_bh = new_bh; + get_bh(new_first_bh); + } + + ocfs2_journal_dirty(handle, new_bh); + + if (*header_bh == old_bh) { + brelse(*header_bh); + *header_bh = new_bh; + get_bh(*header_bh); + + brelse(*first_bh); + *first_bh = new_first_bh; + get_bh(*first_bh); + } + brelse(new_bh); + brelse(old_bh); + } + + le16_add_cpu(&xh->xh_num_buckets, -(num_buckets / 2)); + + ocfs2_journal_dirty(handle, prev_bh); +out: + brelse(prev_bh); + brelse(new_first_bh); + return ret; +} + +/* + * Find the suitable pos when we divide a bucket into 2. + * We have to make sure the xattrs with the same hash value exist + * in the same bucket. + * + * If this ocfs2_xattr_header covers more than one hash value, find a + * place where the hash value changes. Try to find the most even split. + * The most common case is that all entries have different hash values, + * and the first check we make will find a place to split. + */ +static int ocfs2_xattr_find_divide_pos(struct ocfs2_xattr_header *xh) +{ + struct ocfs2_xattr_entry *entries = xh->xh_entries; + int count = le16_to_cpu(xh->xh_count); + int delta, middle = count / 2; + + /* + * We start at the middle. Each step gets farther away in both + * directions. We therefore hit the change in hash value + * nearest to the middle. Note that this loop does not execute for + * count < 2. + */ + for (delta = 0; delta < middle; delta++) { + /* Let's check delta earlier than middle */ + if (cmp_xe(&entries[middle - delta - 1], + &entries[middle - delta])) + return middle - delta; + + /* For even counts, don't walk off the end */ + if ((middle + delta + 1) == count) + continue; + + /* Now try delta past middle */ + if (cmp_xe(&entries[middle + delta], + &entries[middle + delta + 1])) + return middle + delta + 1; + } + + /* Every entry had the same hash */ + return count; +} + +/* + * Move some xattrs in old bucket(blk) to new bucket(new_blk). + * first_hash will record the 1st hash of the new bucket. + * + * Normally half of the xattrs will be moved. But we have to make + * sure that the xattrs with the same hash value are stored in the + * same bucket. If all the xattrs in this bucket have the same hash + * value, the new bucket will be initialized as an empty one and the + * first_hash will be initialized as (hash_value+1). + */ +static int ocfs2_divide_xattr_bucket(struct inode *inode, + handle_t *handle, + u64 blk, + u64 new_blk, + u32 *first_hash, + int new_bucket_head) +{ + int ret, i; + int count, start, len, name_value_len = 0, xe_len, name_offset = 0; + struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; + struct ocfs2_xattr_header *xh; + struct ocfs2_xattr_entry *xe; + int blocksize = inode->i_sb->s_blocksize; + + mlog(0, "move some of xattrs from bucket %llu to %llu\n", + (unsigned long long)blk, (unsigned long long)new_blk); + + s_bucket = ocfs2_xattr_bucket_new(inode); + t_bucket = ocfs2_xattr_bucket_new(inode); + if (!s_bucket || !t_bucket) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + + ret = ocfs2_read_xattr_bucket(s_bucket, blk); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_xattr_bucket_journal_access(handle, s_bucket, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* + * Even if !new_bucket_head, we're overwriting t_bucket. Thus, + * there's no need to read it. + */ + ret = ocfs2_init_xattr_bucket(t_bucket, new_blk); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* + * Hey, if we're overwriting t_bucket, what difference does + * ACCESS_CREATE vs ACCESS_WRITE make? See the comment in the + * same part of ocfs2_cp_xattr_bucket(). + */ + ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, + new_bucket_head ? + OCFS2_JOURNAL_ACCESS_CREATE : + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + xh = bucket_xh(s_bucket); + count = le16_to_cpu(xh->xh_count); + start = ocfs2_xattr_find_divide_pos(xh); + + if (start == count) { + xe = &xh->xh_entries[start-1]; + + /* + * initialized a new empty bucket here. + * The hash value is set as one larger than + * that of the last entry in the previous bucket. + */ + for (i = 0; i < t_bucket->bu_blocks; i++) + memset(bucket_block(t_bucket, i), 0, blocksize); + + xh = bucket_xh(t_bucket); + xh->xh_free_start = cpu_to_le16(blocksize); + xh->xh_entries[0].xe_name_hash = xe->xe_name_hash; + le32_add_cpu(&xh->xh_entries[0].xe_name_hash, 1); + + goto set_num_buckets; + } + + /* copy the whole bucket to the new first. */ + ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); + + /* update the new bucket. */ + xh = bucket_xh(t_bucket); + + /* + * Calculate the total name/value len and xh_free_start for + * the old bucket first. + */ + name_offset = OCFS2_XATTR_BUCKET_SIZE; + name_value_len = 0; + for (i = 0; i < start; i++) { + xe = &xh->xh_entries[i]; + xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); + if (ocfs2_xattr_is_local(xe)) + xe_len += + OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); + else + xe_len += OCFS2_XATTR_ROOT_SIZE; + name_value_len += xe_len; + if (le16_to_cpu(xe->xe_name_offset) < name_offset) + name_offset = le16_to_cpu(xe->xe_name_offset); + } + + /* + * Now begin the modification to the new bucket. + * + * In the new bucket, We just move the xattr entry to the beginning + * and don't touch the name/value. So there will be some holes in the + * bucket, and they will be removed when ocfs2_defrag_xattr_bucket is + * called. + */ + xe = &xh->xh_entries[start]; + len = sizeof(struct ocfs2_xattr_entry) * (count - start); + mlog(0, "mv xattr entry len %d from %d to %d\n", len, + (int)((char *)xe - (char *)xh), + (int)((char *)xh->xh_entries - (char *)xh)); + memmove((char *)xh->xh_entries, (char *)xe, len); + xe = &xh->xh_entries[count - start]; + len = sizeof(struct ocfs2_xattr_entry) * start; + memset((char *)xe, 0, len); + + le16_add_cpu(&xh->xh_count, -start); + le16_add_cpu(&xh->xh_name_value_len, -name_value_len); + + /* Calculate xh_free_start for the new bucket. */ + xh->xh_free_start = cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); + for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { + xe = &xh->xh_entries[i]; + xe_len = OCFS2_XATTR_SIZE(xe->xe_name_len); + if (ocfs2_xattr_is_local(xe)) + xe_len += + OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); + else + xe_len += OCFS2_XATTR_ROOT_SIZE; + if (le16_to_cpu(xe->xe_name_offset) < + le16_to_cpu(xh->xh_free_start)) + xh->xh_free_start = xe->xe_name_offset; + } + +set_num_buckets: + /* set xh->xh_num_buckets for the new xh. */ + if (new_bucket_head) + xh->xh_num_buckets = cpu_to_le16(1); + else + xh->xh_num_buckets = 0; + + ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); + + /* store the first_hash of the new bucket. */ + if (first_hash) + *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); + + /* + * Now only update the 1st block of the old bucket. If we + * just added a new empty bucket, there is no need to modify + * it. + */ + if (start == count) + goto out; + + xh = bucket_xh(s_bucket); + memset(&xh->xh_entries[start], 0, + sizeof(struct ocfs2_xattr_entry) * (count - start)); + xh->xh_count = cpu_to_le16(start); + xh->xh_free_start = cpu_to_le16(name_offset); + xh->xh_name_value_len = cpu_to_le16(name_value_len); + + ocfs2_xattr_bucket_journal_dirty(handle, s_bucket); + +out: + ocfs2_xattr_bucket_free(s_bucket); + ocfs2_xattr_bucket_free(t_bucket); + + return ret; +} + +/* + * Copy xattr from one bucket to another bucket. + * + * The caller must make sure that the journal transaction + * has enough space for journaling. + */ +static int ocfs2_cp_xattr_bucket(struct inode *inode, + handle_t *handle, + u64 s_blkno, + u64 t_blkno, + int t_is_new) +{ + int ret; + struct ocfs2_xattr_bucket *s_bucket = NULL, *t_bucket = NULL; + + BUG_ON(s_blkno == t_blkno); + + mlog(0, "cp bucket %llu to %llu, target is %d\n", + (unsigned long long)s_blkno, (unsigned long long)t_blkno, + t_is_new); + + s_bucket = ocfs2_xattr_bucket_new(inode); + t_bucket = ocfs2_xattr_bucket_new(inode); + if (!s_bucket || !t_bucket) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + + ret = ocfs2_read_xattr_bucket(s_bucket, s_blkno); + if (ret) + goto out; + + /* + * Even if !t_is_new, we're overwriting t_bucket. Thus, + * there's no need to read it. + */ + ret = ocfs2_init_xattr_bucket(t_bucket, t_blkno); + if (ret) + goto out; + + /* + * Hey, if we're overwriting t_bucket, what difference does + * ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new + * cluster to fill, we came here from ocfs2_cp_xattr_cluster(), and + * it is really new - ACCESS_CREATE is required. But we also + * might have moved data out of t_bucket before extending back + * into it. ocfs2_add_new_xattr_bucket() can do this - its call + * to ocfs2_add_new_xattr_cluster() may have created a new extent + * and copied out the end of the old extent. Then it re-extends + * the old extent back to create space for new xattrs. That's + * how we get here, and the bucket isn't really new. + */ + ret = ocfs2_xattr_bucket_journal_access(handle, t_bucket, + t_is_new ? + OCFS2_JOURNAL_ACCESS_CREATE : + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) + goto out; + + ocfs2_xattr_bucket_copy_data(t_bucket, s_bucket); + ocfs2_xattr_bucket_journal_dirty(handle, t_bucket); + +out: + ocfs2_xattr_bucket_free(t_bucket); + ocfs2_xattr_bucket_free(s_bucket); + + return ret; +} + +/* + * src_blk points to the last cluster of an existing extent. to_blk + * points to a newly allocated extent. We copy the cluster over to the + * new extent, initializing its xh_num_buckets. The old extent's + * xh_num_buckets shrinks by the same amount. + */ +static int ocfs2_cp_xattr_cluster(struct inode *inode, + handle_t *handle, + struct buffer_head *first_bh, + u64 src_blk, + u64 to_blk, + u32 *first_hash) +{ + int i, ret, credits; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); + int blks_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); + int num_buckets = ocfs2_xattr_buckets_per_cluster(osb); + struct ocfs2_xattr_bucket *old_first, *new_first; + + mlog(0, "cp xattrs from cluster %llu to %llu\n", + (unsigned long long)src_blk, (unsigned long long)to_blk); + + /* The first bucket of the original extent */ + old_first = ocfs2_xattr_bucket_new(inode); + /* The first bucket of the new extent */ + new_first = ocfs2_xattr_bucket_new(inode); + if (!old_first || !new_first) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + + ret = ocfs2_read_xattr_bucket(old_first, first_bh->b_blocknr); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* + * We need to update the first bucket of the old extent and the + * entire first cluster of the new extent. + */ + credits = blks_per_bucket + bpc + handle->h_buffer_credits; + ret = ocfs2_extend_trans(handle, credits); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_xattr_bucket_journal_access(handle, old_first, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + for (i = 0; i < num_buckets; i++) { + ret = ocfs2_cp_xattr_bucket(inode, handle, + src_blk + (i * blks_per_bucket), + to_blk + (i * blks_per_bucket), + 1); + if (ret) { + mlog_errno(ret); + goto out; + } + } + + /* + * Get the new bucket ready before we dirty anything + * (This actually shouldn't fail, because we already dirtied + * it once in ocfs2_cp_xattr_bucket()). + */ + ret = ocfs2_read_xattr_bucket(new_first, to_blk); + if (ret) { + mlog_errno(ret); + goto out; + } + ret = ocfs2_xattr_bucket_journal_access(handle, new_first, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* Now update the headers */ + le16_add_cpu(&bucket_xh(old_first)->xh_num_buckets, -num_buckets); + ocfs2_xattr_bucket_journal_dirty(handle, old_first); + + bucket_xh(new_first)->xh_num_buckets = cpu_to_le16(num_buckets); + ocfs2_xattr_bucket_journal_dirty(handle, new_first); + + if (first_hash) + *first_hash = le32_to_cpu(bucket_xh(new_first)->xh_entries[0].xe_name_hash); + +out: + ocfs2_xattr_bucket_free(new_first); + ocfs2_xattr_bucket_free(old_first); + return ret; +} + +/* + * Move some xattrs in this cluster to the new cluster. + * This function should only be called when bucket size == cluster size. + * Otherwise ocfs2_mv_xattr_bucket_cross_cluster should be used instead. + */ +static int ocfs2_divide_xattr_cluster(struct inode *inode, + handle_t *handle, + u64 prev_blk, + u64 new_blk, + u32 *first_hash) +{ + u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); + int ret, credits = 2 * blk_per_bucket + handle->h_buffer_credits; + + BUG_ON(OCFS2_XATTR_BUCKET_SIZE < OCFS2_SB(inode->i_sb)->s_clustersize); + + ret = ocfs2_extend_trans(handle, credits); + if (ret) { + mlog_errno(ret); + return ret; + } + + /* Move half of the xattr in start_blk to the next bucket. */ + return ocfs2_divide_xattr_bucket(inode, handle, prev_blk, + new_blk, first_hash, 1); +} + +/* + * Move some xattrs from the old cluster to the new one since they are not + * contiguous in ocfs2 xattr tree. + * + * new_blk starts a new separate cluster, and we will move some xattrs from + * prev_blk to it. v_start will be set as the first name hash value in this + * new cluster so that it can be used as e_cpos during tree insertion and + * don't collide with our original b-tree operations. first_bh and header_bh + * will also be updated since they will be used in ocfs2_extend_xattr_bucket + * to extend the insert bucket. + * + * The problem is how much xattr should we move to the new one and when should + * we update first_bh and header_bh? + * 1. If cluster size > bucket size, that means the previous cluster has more + * than 1 bucket, so just move half nums of bucket into the new cluster and + * update the first_bh and header_bh if the insert bucket has been moved + * to the new cluster. + * 2. If cluster_size == bucket_size: + * a) If the previous extent rec has more than one cluster and the insert + * place isn't in the last cluster, copy the entire last cluster to the + * new one. This time, we don't need to upate the first_bh and header_bh + * since they will not be moved into the new cluster. + * b) Otherwise, move the bottom half of the xattrs in the last cluster into + * the new one. And we set the extend flag to zero if the insert place is + * moved into the new allocated cluster since no extend is needed. + */ +static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode, + handle_t *handle, + struct buffer_head **first_bh, + struct buffer_head **header_bh, + u64 new_blk, + u64 prev_blk, + u32 prev_clusters, + u32 *v_start, + int *extend) +{ + int ret = 0; + int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); + + mlog(0, "adjust xattrs from cluster %llu len %u to %llu\n", + (unsigned long long)prev_blk, prev_clusters, + (unsigned long long)new_blk); + + if (ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)) > 1) + ret = ocfs2_mv_xattr_bucket_cross_cluster(inode, + handle, + first_bh, + header_bh, + new_blk, + prev_blk, + prev_clusters, + v_start); + else { + u64 last_blk = prev_blk + bpc * (prev_clusters - 1); + + if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk) + ret = ocfs2_cp_xattr_cluster(inode, handle, *first_bh, + last_blk, new_blk, + v_start); + else { + ret = ocfs2_divide_xattr_cluster(inode, handle, + last_blk, new_blk, + v_start); + + if ((*header_bh)->b_blocknr == last_blk && extend) + *extend = 0; + } + } + + return ret; +} + +/* + * Add a new cluster for xattr storage. + * + * If the new cluster is contiguous with the previous one, it will be + * appended to the same extent record, and num_clusters will be updated. + * If not, we will insert a new extent for it and move some xattrs in + * the last cluster into the new allocated one. + * We also need to limit the maximum size of a btree leaf, otherwise we'll + * lose the benefits of hashing because we'll have to search large leaves. + * So now the maximum size is OCFS2_MAX_XATTR_TREE_LEAF_SIZE(or clustersize, + * if it's bigger). + * + * first_bh is the first block of the previous extent rec and header_bh + * indicates the bucket we will insert the new xattrs. They will be updated + * when the header_bh is moved into the new cluster. + */ +static int ocfs2_add_new_xattr_cluster(struct inode *inode, + struct buffer_head *root_bh, + struct buffer_head **first_bh, + struct buffer_head **header_bh, + u32 *num_clusters, + u32 prev_cpos, + u64 prev_blkno, + int *extend, + struct ocfs2_xattr_set_ctxt *ctxt) +{ + int ret; + u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); + u32 prev_clusters = *num_clusters; + u32 clusters_to_add = 1, bit_off, num_bits, v_start = 0; + u64 block; + handle_t *handle = ctxt->handle; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_extent_tree et; + + mlog(0, "Add new xattr cluster for %llu, previous xattr hash = %u, " + "previous xattr blkno = %llu\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno, + prev_cpos, (unsigned long long)prev_blkno); + + ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); + + ret = ocfs2_journal_access(handle, inode, root_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret < 0) { + mlog_errno(ret); + goto leave; + } + + ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1, + clusters_to_add, &bit_off, &num_bits); + if (ret < 0) { + if (ret != -ENOSPC) + mlog_errno(ret); + goto leave; + } + + BUG_ON(num_bits > clusters_to_add); + + block = ocfs2_clusters_to_blocks(osb->sb, bit_off); + mlog(0, "Allocating %u clusters at block %u for xattr in inode %llu\n", + num_bits, bit_off, (unsigned long long)OCFS2_I(inode)->ip_blkno); + + if (prev_blkno + prev_clusters * bpc == block && + (prev_clusters + num_bits) << osb->s_clustersize_bits <= + OCFS2_MAX_XATTR_TREE_LEAF_SIZE) { + /* + * If this cluster is contiguous with the old one and + * adding this new cluster, we don't surpass the limit of + * OCFS2_MAX_XATTR_TREE_LEAF_SIZE, cool. We will let it be + * initialized and used like other buckets in the previous + * cluster. + * So add it as a contiguous one. The caller will handle + * its init process. + */ + v_start = prev_cpos + prev_clusters; + *num_clusters = prev_clusters + num_bits; + mlog(0, "Add contiguous %u clusters to previous extent rec.\n", + num_bits); + } else { + ret = ocfs2_adjust_xattr_cross_cluster(inode, + handle, + first_bh, + header_bh, + block, + prev_blkno, + prev_clusters, + &v_start, + extend); + if (ret) { + mlog_errno(ret); + goto leave; + } + } + + mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", + num_bits, (unsigned long long)block, v_start); + ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, + num_bits, 0, ctxt->meta_ac); + if (ret < 0) { + mlog_errno(ret); + goto leave; + } + + ret = ocfs2_journal_dirty(handle, root_bh); + if (ret < 0) + mlog_errno(ret); + +leave: + return ret; +} + +/* + * We are given an extent. 'first' is the bucket at the very front of + * the extent. The extent has space for an additional bucket past + * bucket_xh(first)->xh_num_buckets. 'target_blkno' is the block number + * of the target bucket. We wish to shift every bucket past the target + * down one, filling in that additional space. When we get back to the + * target, we split the target between itself and the now-empty bucket + * at target+1 (aka, target_blkno + blks_per_bucket). + */ +static int ocfs2_extend_xattr_bucket(struct inode *inode, + handle_t *handle, + struct ocfs2_xattr_bucket *first, + u64 target_blk, + u32 num_clusters) +{ + int ret, credits; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); + u64 end_blk; + u16 new_bucket = le16_to_cpu(bucket_xh(first)->xh_num_buckets); + + mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " + "from %llu, len = %u\n", (unsigned long long)target_blk, + (unsigned long long)bucket_blkno(first), num_clusters); + + /* The extent must have room for an additional bucket */ + BUG_ON(new_bucket >= + (num_clusters * ocfs2_xattr_buckets_per_cluster(osb))); + + /* end_blk points to the last existing bucket */ + end_blk = bucket_blkno(first) + ((new_bucket - 1) * blk_per_bucket); + + /* + * end_blk is the start of the last existing bucket. + * Thus, (end_blk - target_blk) covers the target bucket and + * every bucket after it up to, but not including, the last + * existing bucket. Then we add the last existing bucket, the + * new bucket, and the first bucket (3 * blk_per_bucket). + */ + credits = (end_blk - target_blk) + (3 * blk_per_bucket) + + handle->h_buffer_credits; + ret = ocfs2_extend_trans(handle, credits); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_xattr_bucket_journal_access(handle, first, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + while (end_blk != target_blk) { + ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, + end_blk + blk_per_bucket, 0); + if (ret) + goto out; + end_blk -= blk_per_bucket; + } + + /* Move half of the xattr in target_blkno to the next bucket. */ + ret = ocfs2_divide_xattr_bucket(inode, handle, target_blk, + target_blk + blk_per_bucket, NULL, 0); + + le16_add_cpu(&bucket_xh(first)->xh_num_buckets, 1); + ocfs2_xattr_bucket_journal_dirty(handle, first); + +out: + return ret; +} + +/* + * Add new xattr bucket in an extent record and adjust the buckets accordingly. + * xb_bh is the ocfs2_xattr_block. + * We will move all the buckets starting from header_bh to the next place. As + * for this one, half num of its xattrs will be moved to the next one. + * + * We will allocate a new cluster if current cluster is full and adjust + * header_bh and first_bh if the insert place is moved to the new cluster. + */ +static int ocfs2_add_new_xattr_bucket(struct inode *inode, + struct buffer_head *xb_bh, + struct buffer_head *header_bh, + struct ocfs2_xattr_set_ctxt *ctxt) +{ + struct ocfs2_xattr_header *first_xh = NULL; + struct buffer_head *first_bh = NULL; + struct ocfs2_xattr_block *xb = + (struct ocfs2_xattr_block *)xb_bh->b_data; + struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; + struct ocfs2_extent_list *el = &xb_root->xt_list; + struct ocfs2_xattr_header *xh = + (struct ocfs2_xattr_header *)header_bh->b_data; + u32 name_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); + struct super_block *sb = inode->i_sb; + struct ocfs2_super *osb = OCFS2_SB(sb); + int ret, num_buckets, extend = 1; + u64 p_blkno; + u32 e_cpos, num_clusters; + /* The bucket at the front of the extent */ + struct ocfs2_xattr_bucket *first; + + mlog(0, "Add new xattr bucket starting form %llu\n", + (unsigned long long)header_bh->b_blocknr); + + first = ocfs2_xattr_bucket_new(inode); + if (!first) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + + /* + * Add refrence for header_bh here because it may be + * changed in ocfs2_add_new_xattr_cluster and we need + * to free it in the end. + */ + get_bh(header_bh); + + ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &e_cpos, + &num_clusters, el); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_read_block(inode, p_blkno, &first_bh, NULL); + if (ret) { + mlog_errno(ret); + goto out; + } + + num_buckets = ocfs2_xattr_buckets_per_cluster(osb) * num_clusters; + first_xh = (struct ocfs2_xattr_header *)first_bh->b_data; + + if (num_buckets == le16_to_cpu(first_xh->xh_num_buckets)) { + ret = ocfs2_add_new_xattr_cluster(inode, + xb_bh, + &first_bh, + &header_bh, + &num_clusters, + e_cpos, + p_blkno, + &extend, + ctxt); + if (ret) { + mlog_errno(ret); + goto out; + } + } + + if (extend) { + /* These bucket reads should be cached */ + ret = ocfs2_read_xattr_bucket(first, first_bh->b_blocknr); + if (ret) { + mlog_errno(ret); + goto out; + } + ret = ocfs2_extend_xattr_bucket(inode, + ctxt->handle, + first, header_bh->b_blocknr, + num_clusters); + if (ret) + mlog_errno(ret); + } + +out: + brelse(first_bh); + brelse(header_bh); + ocfs2_xattr_bucket_free(first); + return ret; +} + +static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode, + struct ocfs2_xattr_bucket *bucket, + int offs) +{ + int block_off = offs >> inode->i_sb->s_blocksize_bits; + + offs = offs % inode->i_sb->s_blocksize; + return bucket_block(bucket, block_off) + offs; +} + +/* + * Handle the normal xattr set, including replace, delete and new. + * + * Note: "local" indicates the real data's locality. So we can't + * just its bucket locality by its length. + */ +static void ocfs2_xattr_set_entry_normal(struct inode *inode, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xs, + u32 name_hash, + int local) +{ + struct ocfs2_xattr_entry *last, *xe; + int name_len = strlen(xi->name); + struct ocfs2_xattr_header *xh = xs->header; + u16 count = le16_to_cpu(xh->xh_count), start; + size_t blocksize = inode->i_sb->s_blocksize; + char *val; + size_t offs, size, new_size; + + last = &xh->xh_entries[count]; + if (!xs->not_found) { + xe = xs->here; + offs = le16_to_cpu(xe->xe_name_offset); + if (ocfs2_xattr_is_local(xe)) + size = OCFS2_XATTR_SIZE(name_len) + + OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); + else + size = OCFS2_XATTR_SIZE(name_len) + + OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); + + /* + * If the new value will be stored outside, xi->value has been + * initalized as an empty ocfs2_xattr_value_root, and the same + * goes with xi->value_len, so we can set new_size safely here. + * See ocfs2_xattr_set_in_bucket. + */ + new_size = OCFS2_XATTR_SIZE(name_len) + + OCFS2_XATTR_SIZE(xi->value_len); + + le16_add_cpu(&xh->xh_name_value_len, -size); + if (xi->value) { + if (new_size > size) + goto set_new_name_value; + + /* Now replace the old value with new one. */ + if (local) + xe->xe_value_size = cpu_to_le64(xi->value_len); + else + xe->xe_value_size = 0; + + val = ocfs2_xattr_bucket_get_val(inode, + xs->bucket, offs); + memset(val + OCFS2_XATTR_SIZE(name_len), 0, + size - OCFS2_XATTR_SIZE(name_len)); + if (OCFS2_XATTR_SIZE(xi->value_len) > 0) + memcpy(val + OCFS2_XATTR_SIZE(name_len), + xi->value, xi->value_len); + + le16_add_cpu(&xh->xh_name_value_len, new_size); + ocfs2_xattr_set_local(xe, local); + return; + } else { + /* + * Remove the old entry if there is more than one. + * We don't remove the last entry so that we can + * use it to indicate the hash value of the empty + * bucket. + */ + last -= 1; + le16_add_cpu(&xh->xh_count, -1); + if (xh->xh_count) { + memmove(xe, xe + 1, + (void *)last - (void *)xe); + memset(last, 0, + sizeof(struct ocfs2_xattr_entry)); + } else + xh->xh_free_start = + cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE); + + return; + } + } else { + /* find a new entry for insert. */ + int low = 0, high = count - 1, tmp; + struct ocfs2_xattr_entry *tmp_xe; + + while (low <= high && count) { + tmp = (low + high) / 2; + tmp_xe = &xh->xh_entries[tmp]; + + if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash)) + low = tmp + 1; + else if (name_hash < + le32_to_cpu(tmp_xe->xe_name_hash)) + high = tmp - 1; + else { + low = tmp; + break; + } + } + + xe = &xh->xh_entries[low]; + if (low != count) + memmove(xe + 1, xe, (void *)last - (void *)xe); + + le16_add_cpu(&xh->xh_count, 1); + memset(xe, 0, sizeof(struct ocfs2_xattr_entry)); + xe->xe_name_hash = cpu_to_le32(name_hash); + xe->xe_name_len = name_len; + ocfs2_xattr_set_type(xe, xi->name_index); + } + +set_new_name_value: + /* Insert the new name+value. */ + size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_SIZE(xi->value_len); + + /* + * We must make sure that the name/value pair + * exists in the same block. + */ + offs = le16_to_cpu(xh->xh_free_start); + start = offs - size; + + if (start >> inode->i_sb->s_blocksize_bits != + (offs - 1) >> inode->i_sb->s_blocksize_bits) { + offs = offs - offs % blocksize; + xh->xh_free_start = cpu_to_le16(offs); + } + + val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size); + xe->xe_name_offset = cpu_to_le16(offs - size); + + memset(val, 0, size); + memcpy(val, xi->name, name_len); + memcpy(val + OCFS2_XATTR_SIZE(name_len), xi->value, xi->value_len); + + xe->xe_value_size = cpu_to_le64(xi->value_len); + ocfs2_xattr_set_local(xe, local); + xs->here = xe; + le16_add_cpu(&xh->xh_free_start, -size); + le16_add_cpu(&xh->xh_name_value_len, size); + + return; +} + +/* + * Set the xattr entry in the specified bucket. + * The bucket is indicated by xs->bucket and it should have the enough + * space for the xattr insertion. + */ +static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode, + handle_t *handle, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xs, + u32 name_hash, + int local) +{ + int ret; + u64 blkno; + + mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", + (unsigned long)xi->value_len, xi->name_index, + (unsigned long long)bucket_blkno(xs->bucket)); + + if (!xs->bucket->bu_bhs[1]) { + blkno = bucket_blkno(xs->bucket); + ocfs2_xattr_bucket_relse(xs->bucket); + ret = ocfs2_read_xattr_bucket(xs->bucket, blkno); + if (ret) { + mlog_errno(ret); + goto out; + } + } + + ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + + ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); + ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); + +out: + return ret; +} + +/* + * Truncate the specified xe_off entry in xattr bucket. + * bucket is indicated by header_bh and len is the new length. + * Both the ocfs2_xattr_value_root and the entry will be updated here. + * + * Copy the new updated xe and xe_value_root to new_xe and new_xv if needed. + */ +static int ocfs2_xattr_bucket_value_truncate(struct inode *inode, + struct ocfs2_xattr_bucket *bucket, + int xe_off, + int len, + struct ocfs2_xattr_set_ctxt *ctxt) +{ + int ret, offset; + u64 value_blk; + struct buffer_head *value_bh = NULL; + struct ocfs2_xattr_value_root *xv; + struct ocfs2_xattr_entry *xe; + struct ocfs2_xattr_header *xh = bucket_xh(bucket); + size_t blocksize = inode->i_sb->s_blocksize; + + xe = &xh->xh_entries[xe_off]; + + BUG_ON(!xe || ocfs2_xattr_is_local(xe)); + + offset = le16_to_cpu(xe->xe_name_offset) + + OCFS2_XATTR_SIZE(xe->xe_name_len); + + value_blk = offset / blocksize; + + /* We don't allow ocfs2_xattr_value to be stored in different block. */ + BUG_ON(value_blk != (offset + OCFS2_XATTR_ROOT_SIZE - 1) / blocksize); + + value_bh = bucket->bu_bhs[value_blk]; + BUG_ON(!value_bh); + + xv = (struct ocfs2_xattr_value_root *) + (value_bh->b_data + offset % blocksize); + + ret = ocfs2_xattr_bucket_journal_access(ctxt->handle, bucket, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out; + } + + /* + * From here on out we have to dirty the bucket. The generic + * value calls only modify one of the bucket's bhs, but we need + * to send the bucket at once. So if they error, they *could* have + * modified something. We have to assume they did, and dirty + * the whole bucket. This leaves us in a consistent state. + */ + mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", + xe_off, (unsigned long long)bucket_blkno(bucket), len); + ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len, ctxt); + if (ret) { + mlog_errno(ret); + goto out_dirty; + } + + xe->xe_value_size = cpu_to_le64(len); + +out_dirty: + ocfs2_xattr_bucket_journal_dirty(ctxt->handle, bucket); + +out: + return ret; +} + +static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, + struct ocfs2_xattr_search *xs, + int len, + struct ocfs2_xattr_set_ctxt *ctxt) +{ + int ret, offset; + struct ocfs2_xattr_entry *xe = xs->here; + struct ocfs2_xattr_header *xh = (struct ocfs2_xattr_header *)xs->base; + + BUG_ON(!xs->bucket->bu_bhs[0] || !xe || ocfs2_xattr_is_local(xe)); + + offset = xe - xh->xh_entries; + ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket, + offset, len, ctxt); + if (ret) + mlog_errno(ret); + + return ret; +} + +static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, + handle_t *handle, + struct ocfs2_xattr_search *xs, + char *val, + int value_len) +{ + int offset; + struct ocfs2_xattr_value_root *xv; + struct ocfs2_xattr_entry *xe = xs->here; + + BUG_ON(!xs->base || !xe || ocfs2_xattr_is_local(xe)); + + offset = le16_to_cpu(xe->xe_name_offset) + + OCFS2_XATTR_SIZE(xe->xe_name_len); + + xv = (struct ocfs2_xattr_value_root *)(xs->base + offset); + + return __ocfs2_xattr_set_value_outside(inode, handle, + xv, val, value_len); +} + +static int ocfs2_rm_xattr_cluster(struct inode *inode, + struct buffer_head *root_bh, + u64 blkno, + u32 cpos, + u32 len) +{ + int ret; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct inode *tl_inode = osb->osb_tl_inode; + handle_t *handle; + struct ocfs2_xattr_block *xb = + (struct ocfs2_xattr_block *)root_bh->b_data; + struct ocfs2_alloc_context *meta_ac = NULL; + struct ocfs2_cached_dealloc_ctxt dealloc; + struct ocfs2_extent_tree et; + + ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); + + ocfs2_init_dealloc_ctxt(&dealloc); + + mlog(0, "rm xattr extent rec at %u len = %u, start from %llu\n", + cpos, len, (unsigned long long)blkno); + + ocfs2_remove_xattr_clusters_from_cache(inode, blkno, len); + + ret = ocfs2_lock_allocators(inode, &et, 0, 1, NULL, &meta_ac); + if (ret) { + mlog_errno(ret); + return ret; + } + + mutex_lock(&tl_inode->i_mutex); + + if (ocfs2_truncate_log_needs_flush(osb)) { + ret = __ocfs2_flush_truncate_log(osb); + if (ret < 0) { + mlog_errno(ret); + goto out; + } + } + + handle = ocfs2_start_trans(osb, ocfs2_remove_extent_credits(osb->sb)); + if (IS_ERR(handle)) { + ret = -ENOMEM; + mlog_errno(ret); + goto out; + } + + ret = ocfs2_journal_access(handle, inode, root_bh, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac, + &dealloc); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, -len); + + ret = ocfs2_journal_dirty(handle, root_bh); + if (ret) { + mlog_errno(ret); + goto out_commit; + } + + ret = ocfs2_truncate_log_append(osb, handle, blkno, len); + if (ret) + mlog_errno(ret); + +out_commit: + ocfs2_commit_trans(osb, handle); +out: + ocfs2_schedule_truncate_log_flush(osb, 1); + + mutex_unlock(&tl_inode->i_mutex); + + if (meta_ac) + ocfs2_free_alloc_context(meta_ac); + + ocfs2_run_deallocs(osb, &dealloc); + + return ret; +} + +static void ocfs2_xattr_bucket_remove_xs(struct inode *inode, + handle_t *handle, + struct ocfs2_xattr_search *xs) +{ + struct ocfs2_xattr_header *xh = bucket_xh(xs->bucket); + struct ocfs2_xattr_entry *last = &xh->xh_entries[ + le16_to_cpu(xh->xh_count) - 1]; + int ret = 0; + + ret = ocfs2_xattr_bucket_journal_access(handle, xs->bucket, + OCFS2_JOURNAL_ACCESS_WRITE); + if (ret) { + mlog_errno(ret); + return; + } + + /* Remove the old entry. */ + memmove(xs->here, xs->here + 1, + (void *)last - (void *)xs->here); + memset(last, 0, sizeof(struct ocfs2_xattr_entry)); + le16_add_cpu(&xh->xh_count, -1); + + ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket); +} + +/* + * Set the xattr name/value in the bucket specified in xs. + * + * As the new value in xi may be stored in the bucket or in an outside cluster, + * we divide the whole process into 3 steps: + * 1. insert name/value in the bucket(ocfs2_xattr_set_entry_in_bucket) + * 2. truncate of the outside cluster(ocfs2_xattr_bucket_value_truncate_xs) + * 3. Set the value to the outside cluster(ocfs2_xattr_bucket_set_value_outside) + * 4. If the clusters for the new outside value can't be allocated, we need + * to free the xattr we allocated in set. + */ +static int ocfs2_xattr_set_in_bucket(struct inode *inode, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt) +{ + int ret, local = 1; + size_t value_len; + char *val = (char *)xi->value; + struct ocfs2_xattr_entry *xe = xs->here; + u32 name_hash = ocfs2_xattr_name_hash(inode, xi->name, + strlen(xi->name)); + + if (!xs->not_found && !ocfs2_xattr_is_local(xe)) { + /* + * We need to truncate the xattr storage first. + * + * If both the old and new value are stored to + * outside block, we only need to truncate + * the storage and then set the value outside. + * + * If the new value should be stored within block, + * we should free all the outside block first and + * the modification to the xattr block will be done + * by following steps. + */ + if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) + value_len = xi->value_len; + else + value_len = 0; + + ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, + value_len, + ctxt); + if (ret) + goto out; + + if (value_len) + goto set_value_outside; + } + + value_len = xi->value_len; + /* So we have to handle the inside block change now. */ + if (value_len > OCFS2_XATTR_INLINE_SIZE) { + /* + * If the new value will be stored outside of block, + * initalize a new empty value root and insert it first. + */ + local = 0; + xi->value = &def_xv; + xi->value_len = OCFS2_XATTR_ROOT_SIZE; + } + + ret = ocfs2_xattr_set_entry_in_bucket(inode, ctxt->handle, xi, xs, + name_hash, local); + if (ret) { + mlog_errno(ret); + goto out; + } + + if (value_len <= OCFS2_XATTR_INLINE_SIZE) + goto out; + + /* allocate the space now for the outside block storage. */ + ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs, + value_len, ctxt); + if (ret) { + mlog_errno(ret); + + if (xs->not_found) { + /* + * We can't allocate enough clusters for outside + * storage and we have allocated xattr already, + * so need to remove it. + */ + ocfs2_xattr_bucket_remove_xs(inode, ctxt->handle, xs); + } + goto out; + } + +set_value_outside: + ret = ocfs2_xattr_bucket_set_value_outside(inode, ctxt->handle, + xs, val, value_len); +out: + return ret; +} + +/* + * check whether the xattr bucket is filled up with the same hash value. + * If we want to insert the xattr with the same hash, return -ENOSPC. + * If we want to insert a xattr with different hash value, go ahead + * and ocfs2_divide_xattr_bucket will handle this. + */ +static int ocfs2_check_xattr_bucket_collision(struct inode *inode, + struct ocfs2_xattr_bucket *bucket, + const char *name) +{ + struct ocfs2_xattr_header *xh = bucket_xh(bucket); + u32 name_hash = ocfs2_xattr_name_hash(inode, name, strlen(name)); + + if (name_hash != le32_to_cpu(xh->xh_entries[0].xe_name_hash)) + return 0; + + if (xh->xh_entries[le16_to_cpu(xh->xh_count) - 1].xe_name_hash == + xh->xh_entries[0].xe_name_hash) { + mlog(ML_ERROR, "Too much hash collision in xattr bucket %llu, " + "hash = %u\n", + (unsigned long long)bucket_blkno(bucket), + le32_to_cpu(xh->xh_entries[0].xe_name_hash)); + return -ENOSPC; + } + + return 0; +} + +static int ocfs2_xattr_set_entry_index_block(struct inode *inode, + struct ocfs2_xattr_info *xi, + struct ocfs2_xattr_search *xs, + struct ocfs2_xattr_set_ctxt *ctxt) +{ + struct ocfs2_xattr_header *xh; + struct ocfs2_xattr_entry *xe; + u16 count, header_size, xh_free_start; + int free, max_free, need, old; + size_t value_size = 0, name_len = strlen(xi->name); + size_t blocksize = inode->i_sb->s_blocksize; + int ret, allocation = 0; + + mlog_entry("Set xattr %s in xattr index block\n", xi->name); + +try_again: + xh = xs->header; + count = le16_to_cpu(xh->xh_count); + xh_free_start = le16_to_cpu(xh->xh_free_start); + header_size = sizeof(struct ocfs2_xattr_header) + + count * sizeof(struct ocfs2_xattr_entry); + max_free = OCFS2_XATTR_BUCKET_SIZE - + le16_to_cpu(xh->xh_name_value_len) - header_size; + + mlog_bug_on_msg(header_size > blocksize, "bucket %llu has header size " + "of %u which exceed block size\n", + (unsigned long long)bucket_blkno(xs->bucket), + header_size); + + if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) + value_size = OCFS2_XATTR_ROOT_SIZE; + else if (xi->value) + value_size = OCFS2_XATTR_SIZE(xi->value_len); + + if (xs->not_found) + need = sizeof(struct ocfs2_xattr_entry) + + OCFS2_XATTR_SIZE(name_len) + value_size; + else { + need = value_size + OCFS2_XATTR_SIZE(name_len); + + /* + * We only replace the old value if the new length is smaller + * than the old one. Otherwise we will allocate new space in the + * bucket to store it. + */ + xe = xs->here; + if (ocfs2_xattr_is_local(xe)) + old = OCFS2_XATTR_SIZE(le64_to_cpu(xe->xe_value_size)); + else + old = OCFS2_XATTR_SIZE(OCFS2_XATTR_ROOT_SIZE); + + if (old >= value_size) + need = 0; + } + + free = xh_free_start - header_size; + /* + * We need to make sure the new name/value pair + * can exist in the same block. + */ + if (xh_free_start % blocksize < need) + free -= xh_free_start % blocksize; + + mlog(0, "xs->not_found = %d, in xattr bucket %llu: free = %d, " + "need = %d, max_free = %d, xh_free_start = %u, xh_name_value_len =" + " %u\n", xs->not_found, + (unsigned long long)bucket_blkno(xs->bucket), + free, need, max_free, le16_to_cpu(xh->xh_free_start), + le16_to_cpu(xh->xh_name_value_len)); + + if (free < need || + (xs->not_found && + count == ocfs2_xattr_max_xe_in_bucket(inode->i_sb))) { + if (need <= max_free && + count < ocfs2_xattr_max_xe_in_bucket(inode->i_sb)) { + /* + * We can create the space by defragment. Since only the + * name/value will be moved, the xe shouldn't be changed + * in xs. + */ + ret = ocfs2_defrag_xattr_bucket(inode, ctxt->handle, + xs->bucket); + if (ret) { + mlog_errno(ret); + goto out; + } + + xh_free_start = le16_to_cpu(xh->xh_free_start); + free = xh_free_start - header_size; + if (xh_free_start % blocksize < need) + free -= xh_free_start % blocksize; + + if (free >= need) + goto xattr_set; + + mlog(0, "Can't get enough space for xattr insert by " + "defragment. Need %u bytes, but we have %d, so " + "allocate new bucket for it.\n", need, free); + } + + /* + * We have to add new buckets or clusters and one + * allocation should leave us enough space for insert. + */ + BUG_ON(allocation); + + /* + * We do not allow for overlapping ranges between buckets. And + * the maximum number of collisions we will allow for then is + * one bucket's worth, so check it here whether we need to + * add a new bucket for the insert. + */ + ret = ocfs2_check_xattr_bucket_collision(inode, + xs->bucket, + xi->name); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_add_new_xattr_bucket(inode, + xs->xattr_bh, + xs->bucket->bu_bhs[0], + ctxt); + if (ret) { + mlog_errno(ret); + goto out; + } + + ocfs2_xattr_bucket_relse(xs->bucket); + + ret = ocfs2_xattr_index_block_find(inode, xs->xattr_bh, + xi->name_index, + xi->name, xs); + if (ret && ret != -ENODATA) + goto out; + xs->not_found = ret; + allocation = 1; + goto try_again; + } + +xattr_set: + ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt); +out: + mlog_exit(ret); + return ret; +} + +static int ocfs2_delete_xattr_in_bucket(struct inode *inode, + struct ocfs2_xattr_bucket *bucket, + void *para) +{ + int ret = 0; + struct ocfs2_xattr_header *xh = bucket_xh(bucket); + u16 i; + struct ocfs2_xattr_entry *xe; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,}; + int credits = ocfs2_remove_extent_credits(osb->sb) + + ocfs2_blocks_per_xattr_bucket(inode->i_sb); + + + ocfs2_init_dealloc_ctxt(&ctxt.dealloc); + + for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { + xe = &xh->xh_entries[i]; + if (ocfs2_xattr_is_local(xe)) + continue; + + ctxt.handle = ocfs2_start_trans(osb, credits); + if (IS_ERR(ctxt.handle)) { + ret = PTR_ERR(ctxt.handle); + mlog_errno(ret); + break; + } + + ret = ocfs2_xattr_bucket_value_truncate(inode, bucket, + i, 0, &ctxt); + + ocfs2_commit_trans(osb, ctxt.handle); + if (ret) { + mlog_errno(ret); + break; + } + } + + ocfs2_schedule_truncate_log_flush(osb, 1); + ocfs2_run_deallocs(osb, &ctxt.dealloc); + return ret; +} + +static int ocfs2_delete_xattr_index_block(struct inode *inode, + struct buffer_head *xb_bh) +{ + struct ocfs2_xattr_block *xb = + (struct ocfs2_xattr_block *)xb_bh->b_data; + struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; + int ret = 0; + u32 name_hash = UINT_MAX, e_cpos, num_clusters; + u64 p_blkno; + + if (le16_to_cpu(el->l_next_free_rec) == 0) + return 0; + + while (name_hash > 0) { + ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, + &e_cpos, &num_clusters, el); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_iterate_xattr_buckets(inode, p_blkno, num_clusters, + ocfs2_delete_xattr_in_bucket, + NULL); + if (ret) { + mlog_errno(ret); + goto out; + } + + ret = ocfs2_rm_xattr_cluster(inode, xb_bh, + p_blkno, e_cpos, num_clusters); + if (ret) { + mlog_errno(ret); + break; + } + + if (e_cpos == 0) + break; + + name_hash = e_cpos - 1; + } + +out: + return ret; +} + +/* + * 'security' attributes support + */ +static size_t ocfs2_xattr_security_list(struct inode *inode, char *list, + size_t list_size, const char *name, + size_t name_len) +{ + const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN; + const size_t total_len = prefix_len + name_len + 1; + + if (list && total_len <= list_size) { + memcpy(list, XATTR_SECURITY_PREFIX, prefix_len); + memcpy(list + prefix_len, name, name_len); + list[prefix_len + name_len] = '\0'; + } + return total_len; +} + +static int ocfs2_xattr_security_get(struct inode *inode, const char *name, + void *buffer, size_t size) +{ + if (strcmp(name, "") == 0) + return -EINVAL; + return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_SECURITY, name, + buffer, size); +} + +static int ocfs2_xattr_security_set(struct inode *inode, const char *name, + const void *value, size_t size, int flags) +{ + if (strcmp(name, "") == 0) + return -EINVAL; + + return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, name, value, + size, flags); +} + +int ocfs2_init_security_get(struct inode *inode, + struct inode *dir, + struct ocfs2_security_xattr_info *si) +{ + return security_inode_init_security(inode, dir, &si->name, &si->value, + &si->value_len); +} + +int ocfs2_init_security_set(handle_t *handle, + struct inode *inode, + struct buffer_head *di_bh, + struct ocfs2_security_xattr_info *si, + struct ocfs2_alloc_context *xattr_ac, + struct ocfs2_alloc_context *data_ac) +{ + return ocfs2_xattr_set_handle(handle, inode, di_bh, + OCFS2_XATTR_INDEX_SECURITY, + si->name, si->value, si->value_len, 0, + xattr_ac, data_ac); +} + +struct xattr_handler ocfs2_xattr_security_handler = { + .prefix = XATTR_SECURITY_PREFIX, + .list = ocfs2_xattr_security_list, + .get = ocfs2_xattr_security_get, + .set = ocfs2_xattr_security_set, +}; + +/* + * 'trusted' attributes support + */ +static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list, + size_t list_size, const char *name, + size_t name_len) +{ + const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN; + const size_t total_len = prefix_len + name_len + 1; + + if (list && total_len <= list_size) { + memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len); + memcpy(list + prefix_len, name, name_len); + list[prefix_len + name_len] = '\0'; + } + return total_len; +} + +static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name, + void *buffer, size_t size) +{ + if (strcmp(name, "") == 0) + return -EINVAL; + return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name, + buffer, size); +} + +static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name, + const void *value, size_t size, int flags) +{ + if (strcmp(name, "") == 0) + return -EINVAL; + + return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value, + size, flags); +} + +struct xattr_handler ocfs2_xattr_trusted_handler = { + .prefix = XATTR_TRUSTED_PREFIX, + .list = ocfs2_xattr_trusted_list, + .get = ocfs2_xattr_trusted_get, + .set = ocfs2_xattr_trusted_set, +}; + +/* + * 'user' attributes support + */ +static size_t ocfs2_xattr_user_list(struct inode *inode, char *list, + size_t list_size, const char *name, + size_t name_len) +{ + const size_t prefix_len = XATTR_USER_PREFIX_LEN; + const size_t total_len = prefix_len + name_len + 1; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) + return 0; + + if (list && total_len <= list_size) { + memcpy(list, XATTR_USER_PREFIX, prefix_len); + memcpy(list + prefix_len, name, name_len); + list[prefix_len + name_len] = '\0'; + } + return total_len; +} + +static int ocfs2_xattr_user_get(struct inode *inode, const char *name, + void *buffer, size_t size) +{ + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + if (strcmp(name, "") == 0) + return -EINVAL; + if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) + return -EOPNOTSUPP; + return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name, + buffer, size); +} + +static int ocfs2_xattr_user_set(struct inode *inode, const char *name, + const void *value, size_t size, int flags) +{ + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + if (strcmp(name, "") == 0) + return -EINVAL; + if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR) + return -EOPNOTSUPP; + + return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value, + size, flags); +} + +struct xattr_handler ocfs2_xattr_user_handler = { + .prefix = XATTR_USER_PREFIX, + .list = ocfs2_xattr_user_list, + .get = ocfs2_xattr_user_get, + .set = ocfs2_xattr_user_set, +};