| /* -*- mode: c; c-basic-offset: 8; -*- |
| * vim: noexpandtab sw=8 ts=8 sts=0: |
| * |
| * xattr.c |
| * |
| * Copyright (C) 2008 Oracle. All rights reserved. |
| * |
| * CREDITS: |
| * Lots of code in this file is taken from ext3. |
| * |
| * 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. |
| * |
| * 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 <linux/capability.h> |
| #include <linux/fs.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/highmem.h> |
| #include <linux/pagemap.h> |
| #include <linux/uio.h> |
| #include <linux/sched.h> |
| #include <linux/splice.h> |
| #include <linux/mount.h> |
| #include <linux/writeback.h> |
| #include <linux/falloc.h> |
| #include <linux/sort.h> |
| |
| #define MLOG_MASK_PREFIX ML_XATTR |
| #include <cluster/masklog.h> |
| |
| #include "ocfs2.h" |
| #include "alloc.h" |
| #include "dlmglue.h" |
| #include "file.h" |
| #include "symlink.h" |
| #include "sysfile.h" |
| #include "inode.h" |
| #include "journal.h" |
| #include "ocfs2_fs.h" |
| #include "suballoc.h" |
| #include "uptodate.h" |
| #include "buffer_head_io.h" |
| #include "super.h" |
| #include "xattr.h" |
| |
| |
| struct ocfs2_xattr_def_value_root { |
| struct ocfs2_xattr_value_root xv; |
| struct ocfs2_extent_rec er; |
| }; |
| |
| struct ocfs2_xattr_bucket { |
| struct buffer_head *bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET]; |
| struct ocfs2_xattr_header *xh; |
| }; |
| |
| #define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root)) |
| #define OCFS2_XATTR_INLINE_SIZE 80 |
| |
| static struct ocfs2_xattr_def_value_root def_xv = { |
| .xv.xr_list.l_count = cpu_to_le16(1), |
| }; |
| |
| struct xattr_handler *ocfs2_xattr_handlers[] = { |
| &ocfs2_xattr_user_handler, |
| &ocfs2_xattr_trusted_handler, |
| NULL |
| }; |
| |
| static struct xattr_handler *ocfs2_xattr_handler_map[] = { |
| [OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler, |
| [OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler, |
| }; |
| |
| struct ocfs2_xattr_info { |
| int name_index; |
| const char *name; |
| const void *value; |
| size_t value_len; |
| }; |
| |
| struct ocfs2_xattr_search { |
| struct buffer_head *inode_bh; |
| /* |
| * xattr_bh point to the block buffer head which has extended attribute |
| * when extended attribute in inode, xattr_bh is equal to inode_bh. |
| */ |
| struct buffer_head *xattr_bh; |
| struct ocfs2_xattr_header *header; |
| struct ocfs2_xattr_bucket bucket; |
| void *base; |
| void *end; |
| struct ocfs2_xattr_entry *here; |
| int not_found; |
| }; |
| |
| static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
| struct ocfs2_xattr_header *xh, |
| int index, |
| int *block_off, |
| int *new_offset); |
| |
| static int ocfs2_xattr_index_block_find(struct inode *inode, |
| struct buffer_head *root_bh, |
| int name_index, |
| const char *name, |
| struct ocfs2_xattr_search *xs); |
| |
| static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
| struct ocfs2_xattr_tree_root *xt, |
| char *buffer, |
| size_t buffer_size); |
| |
| static int ocfs2_xattr_create_index_block(struct inode *inode, |
| struct ocfs2_xattr_search *xs); |
| |
| static int ocfs2_xattr_set_entry_index_block(struct inode *inode, |
| struct ocfs2_xattr_info *xi, |
| struct ocfs2_xattr_search *xs); |
| |
| static int ocfs2_delete_xattr_index_block(struct inode *inode, |
| struct buffer_head *xb_bh); |
| |
| static inline struct xattr_handler *ocfs2_xattr_handler(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; |
| } |
| |
| static u32 ocfs2_xattr_name_hash(struct inode *inode, |
| char *prefix, |
| int prefix_len, |
| 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) ^ |
| (hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^ |
| *name++; |
| } |
| |
| return hash; |
| } |
| |
| /* |
| * ocfs2_xattr_hash_entry() |
| * |
| * Compute the hash of an extended attribute. |
| */ |
| static void ocfs2_xattr_hash_entry(struct inode *inode, |
| struct ocfs2_xattr_header *header, |
| 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); |
| entry->xe_name_hash = cpu_to_le32(hash); |
| |
| return; |
| } |
| |
| static int ocfs2_xattr_extend_allocation(struct inode *inode, |
| u32 clusters_to_add, |
| struct buffer_head *xattr_bh, |
| struct ocfs2_xattr_value_root *xv) |
| { |
| 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; |
| enum ocfs2_alloc_restarted why; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| 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); |
| |
| ocfs2_init_xattr_value_extent_tree(&et, inode, xattr_bh, xv); |
| |
| restart_all: |
| |
| status = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
| &data_ac, &meta_ac); |
| if (status) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| credits = ocfs2_calc_extend_credits(osb->sb, et.et_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; |
| } |
| |
| restarted_transaction: |
| status = ocfs2_journal_access(handle, inode, xattr_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| prev_clusters = le32_to_cpu(xv->xr_clusters); |
| status = ocfs2_add_clusters_in_btree(osb, |
| inode, |
| &logical_start, |
| clusters_to_add, |
| 0, |
| &et, |
| handle, |
| data_ac, |
| meta_ac, |
| &why); |
| if ((status < 0) && (status != -EAGAIN)) { |
| if (status != -ENOSPC) |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| status = ocfs2_journal_dirty(handle, xattr_bh); |
| if (status < 0) { |
| mlog_errno(status); |
| goto leave; |
| } |
| |
| 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, |
| et.et_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; |
| } |
| } |
| |
| 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; |
| } |
| |
| 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) |
| { |
| 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; |
| struct ocfs2_extent_tree et; |
| |
| ocfs2_init_xattr_value_extent_tree(&et, inode, root_bh, xv); |
| |
| 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); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| 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(&xv->xr_clusters, -len); |
| |
| ret = ocfs2_journal_dirty(handle, root_bh); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| ret = ocfs2_truncate_log_append(osb, handle, 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; |
| } |
| |
| 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) |
| { |
| 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; |
| |
| cpos = new_clusters; |
| trunc_len = old_clusters - new_clusters; |
| while (trunc_len) { |
| ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos, |
| &alloc_size, &xv->xr_list); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| if (alloc_size > trunc_len) |
| alloc_size = trunc_len; |
| |
| ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos, |
| phys_cpos, alloc_size, |
| &dealloc); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); |
| ocfs2_remove_xattr_clusters_from_cache(inode, block, |
| alloc_size); |
| cpos += alloc_size; |
| trunc_len -= alloc_size; |
| } |
| |
| 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 ret; |
| u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len); |
| u32 old_clusters = le32_to_cpu(xv->xr_clusters); |
| |
| if (new_clusters == old_clusters) |
| return 0; |
| |
| if (new_clusters > old_clusters) |
| ret = ocfs2_xattr_extend_allocation(inode, |
| new_clusters - old_clusters, |
| root_bh, xv); |
| else |
| ret = ocfs2_xattr_shrink_size(inode, |
| old_clusters, new_clusters, |
| root_bh, xv); |
| |
| return ret; |
| } |
| |
| 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; |
| |
| 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; |
| } |
| } |
| |
| return buffer_size - rest; |
| } |
| |
| static int ocfs2_xattr_ibody_list(struct inode *inode, |
| struct ocfs2_dinode *di, |
| char *buffer, |
| size_t buffer_size) |
| { |
| struct ocfs2_xattr_header *header = NULL; |
| struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| int ret = 0; |
| |
| if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) |
| return ret; |
| |
| header = (struct ocfs2_xattr_header *) |
| ((void *)di + inode->i_sb->s_blocksize - |
| le16_to_cpu(di->i_xattr_inline_size)); |
| |
| ret = ocfs2_xattr_list_entries(inode, header, buffer, buffer_size); |
| |
| return ret; |
| } |
| |
| static int ocfs2_xattr_block_list(struct inode *inode, |
| struct ocfs2_dinode *di, |
| char *buffer, |
| size_t buffer_size) |
| { |
| struct buffer_head *blk_bh = NULL; |
| struct ocfs2_xattr_block *xb; |
| int ret = 0; |
| |
| 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); |
| 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, |
| buffer, buffer_size); |
| } else { |
| struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root; |
| ret = ocfs2_xattr_tree_list_index_block(inode, xt, |
| buffer, buffer_size); |
| } |
| cleanup: |
| brelse(blk_bh); |
| |
| return ret; |
| } |
| |
| ssize_t ocfs2_listxattr(struct dentry *dentry, |
| char *buffer, |
| size_t size) |
| { |
| int ret = 0, i_ret = 0, b_ret = 0; |
| struct buffer_head *di_bh = NULL; |
| 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; |
| |
| ret = ocfs2_inode_lock(dentry->d_inode, &di_bh, 0); |
| if (ret < 0) { |
| mlog_errno(ret); |
| return ret; |
| } |
| |
| di = (struct ocfs2_dinode *)di_bh->b_data; |
| |
| down_read(&oi->ip_xattr_sem); |
| i_ret = ocfs2_xattr_ibody_list(dentry->d_inode, di, buffer, size); |
| if (i_ret < 0) |
| b_ret = 0; |
| else { |
| if (buffer) { |
| buffer += i_ret; |
| size -= i_ret; |
| } |
| b_ret = ocfs2_xattr_block_list(dentry->d_inode, di, |
| buffer, size); |
| if (b_ret < 0) |
| i_ret = 0; |
| } |
| up_read(&oi->ip_xattr_sem); |
| ocfs2_inode_unlock(dentry->d_inode, 0); |
| |
| brelse(di_bh); |
| |
| return i_ret + b_ret; |
| } |
| |
| static int ocfs2_xattr_find_entry(int name_index, |
| const char *name, |
| struct ocfs2_xattr_search *xs) |
| { |
| struct ocfs2_xattr_entry *entry; |
| size_t name_len; |
| int i, cmp = 1; |
| |
| if (name == NULL) |
| return -EINVAL; |
| |
| name_len = strlen(name); |
| entry = xs->here; |
| for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) { |
| cmp = name_index - ocfs2_xattr_get_type(entry); |
| if (!cmp) |
| cmp = name_len - entry->xe_name_len; |
| if (!cmp) |
| cmp = memcmp(name, (xs->base + |
| le16_to_cpu(entry->xe_name_offset)), |
| name_len); |
| if (cmp == 0) |
| break; |
| entry += 1; |
| } |
| xs->here = entry; |
| |
| return cmp ? -ENODATA : 0; |
| } |
| |
| static int ocfs2_xattr_get_value_outside(struct inode *inode, |
| struct ocfs2_xattr_value_root *xv, |
| void *buffer, |
| size_t len) |
| { |
| u32 cpos, p_cluster, num_clusters, bpc, clusters; |
| u64 blkno; |
| int i, ret = 0; |
| size_t cplen, blocksize; |
| struct buffer_head *bh = NULL; |
| struct ocfs2_extent_list *el; |
| |
| el = &xv->xr_list; |
| clusters = le32_to_cpu(xv->xr_clusters); |
| bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
| blocksize = inode->i_sb->s_blocksize; |
| |
| cpos = 0; |
| while (cpos < clusters) { |
| ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, |
| &num_clusters, el); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| 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); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| cplen = len >= blocksize ? blocksize : len; |
| memcpy(buffer, bh->b_data, cplen); |
| len -= cplen; |
| buffer += cplen; |
| |
| brelse(bh); |
| bh = NULL; |
| if (len == 0) |
| break; |
| } |
| cpos += num_clusters; |
| } |
| out: |
| return ret; |
| } |
| |
| static int ocfs2_xattr_ibody_get(struct inode *inode, |
| int name_index, |
| const char *name, |
| void *buffer, |
| size_t buffer_size, |
| struct ocfs2_xattr_search *xs) |
| { |
| struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; |
| struct ocfs2_xattr_value_root *xv; |
| size_t size; |
| int ret = 0; |
| |
| if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) |
| return -ENODATA; |
| |
| xs->end = (void *)di + inode->i_sb->s_blocksize; |
| xs->header = (struct ocfs2_xattr_header *) |
| (xs->end - le16_to_cpu(di->i_xattr_inline_size)); |
| xs->base = (void *)xs->header; |
| xs->here = xs->header->xh_entries; |
| |
| ret = ocfs2_xattr_find_entry(name_index, name, xs); |
| if (ret) |
| return ret; |
| size = le64_to_cpu(xs->here->xe_value_size); |
| if (buffer) { |
| if (size > buffer_size) |
| return -ERANGE; |
| if (ocfs2_xattr_is_local(xs->here)) { |
| memcpy(buffer, (void *)xs->base + |
| le16_to_cpu(xs->here->xe_name_offset) + |
| OCFS2_XATTR_SIZE(xs->here->xe_name_len), size); |
| } else { |
| xv = (struct ocfs2_xattr_value_root *) |
| (xs->base + le16_to_cpu( |
| xs->here->xe_name_offset) + |
| OCFS2_XATTR_SIZE(xs->here->xe_name_len)); |
| ret = ocfs2_xattr_get_value_outside(inode, xv, |
| buffer, size); |
| if (ret < 0) { |
| mlog_errno(ret); |
| return ret; |
| } |
| } |
| } |
| |
| return size; |
| } |
| |
| static int ocfs2_xattr_block_get(struct inode *inode, |
| int name_index, |
| const char *name, |
| void *buffer, |
| 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) { |
| 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; |
| |
| 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; |
| size = le64_to_cpu(xs->here->xe_value_size); |
| if (buffer) { |
| ret = -ERANGE; |
| if (size > buffer_size) |
| goto cleanup; |
| |
| name_offset = le16_to_cpu(xs->here->xe_name_offset); |
| name_len = OCFS2_XATTR_SIZE(xs->here->xe_name_len); |
| i = xs->here - xs->header->xh_entries; |
| |
| if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) { |
| ret = ocfs2_xattr_bucket_get_name_value(inode, |
| xs->bucket.xh, |
| i, |
| &block_off, |
| &name_offset); |
| xs->base = xs->bucket.bhs[block_off]->b_data; |
| } |
| if (ocfs2_xattr_is_local(xs->here)) { |
| memcpy(buffer, (void *)xs->base + |
| name_offset + name_len, size); |
| } else { |
| xv = (struct ocfs2_xattr_value_root *) |
| (xs->base + name_offset + name_len); |
| ret = ocfs2_xattr_get_value_outside(inode, xv, |
| buffer, size); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto cleanup; |
| } |
| } |
| } |
| 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)); |
| |
| brelse(blk_bh); |
| 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 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, |
| }; |
| struct ocfs2_xattr_search xbs = { |
| .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) |
| ret = ocfs2_xattr_block_get(inode, name_index, name, buffer, |
| buffer_size, &xbs); |
| up_read(&oi->ip_xattr_sem); |
| ocfs2_inode_unlock(inode, 0); |
| |
| brelse(di_bh); |
| |
| return ret; |
| } |
| |
| static int __ocfs2_xattr_set_value_outside(struct inode *inode, |
| struct ocfs2_xattr_value_root *xv, |
| const void *value, |
| int value_len) |
| { |
| int ret = 0, i, cp_len, credits; |
| u16 blocksize = inode->i_sb->s_blocksize; |
| u32 p_cluster, num_clusters; |
| u32 cpos = 0, bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1); |
| 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)); |
| |
| credits = clusters * bpc; |
| handle = ocfs2_start_trans(OCFS2_SB(inode->i_sb), credits); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| while (cpos < clusters) { |
| ret = ocfs2_xattr_get_clusters(inode, cpos, &p_cluster, |
| &num_clusters, &xv->xr_list); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| 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); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| ret = ocfs2_journal_access(handle, |
| inode, |
| bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| cp_len = value_len > blocksize ? blocksize : value_len; |
| memcpy(bh->b_data, value, cp_len); |
| value_len -= cp_len; |
| value += cp_len; |
| if (cp_len < blocksize) |
| memset(bh->b_data + cp_len, 0, |
| blocksize - cp_len); |
| |
| ret = ocfs2_journal_dirty(handle, bh); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| brelse(bh); |
| bh = NULL; |
| |
| /* |
| * XXX: do we need to empty all the following |
| * blocks in this cluster? |
| */ |
| if (!value_len) |
| break; |
| } |
| cpos += num_clusters; |
| } |
| out_commit: |
| ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| out: |
| brelse(bh); |
| |
| return ret; |
| } |
| |
| static int ocfs2_xattr_cleanup(struct inode *inode, |
| 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; |
| } |
| /* Decrease xattr count */ |
| le16_add_cpu(&xs->header->xh_count, -1); |
| /* Remove the xattr entry and tree root which has already be set*/ |
| memset((void *)xs->here, 0, sizeof(struct ocfs2_xattr_entry)); |
| memset(val, 0, size); |
| |
| 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, |
| struct ocfs2_xattr_info *xi, |
| struct ocfs2_xattr_search *xs, |
| size_t offs) |
| { |
| handle_t *handle = NULL; |
| int ret = 0; |
| |
| 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; |
| } |
| |
| xs->here->xe_name_offset = cpu_to_le16(offs); |
| xs->here->xe_value_size = cpu_to_le64(xi->value_len); |
| if (xi->value_len <= OCFS2_XATTR_INLINE_SIZE) |
| ocfs2_xattr_set_local(xs->here, 1); |
| else |
| ocfs2_xattr_set_local(xs->here, 0); |
| ocfs2_xattr_hash_entry(inode, xs->header, xs->here); |
| |
| 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; |
| } |
| |
| /* |
| * ocfs2_xattr_set_value_outside() |
| * |
| * Set large size value in B tree. |
| */ |
| static int ocfs2_xattr_set_value_outside(struct inode *inode, |
| struct ocfs2_xattr_info *xi, |
| struct ocfs2_xattr_search *xs, |
| size_t offs) |
| { |
| size_t name_len = strlen(xi->name); |
| void *val = xs->base + offs; |
| struct ocfs2_xattr_value_root *xv = NULL; |
| size_t size = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; |
| int ret = 0; |
| |
| memset(val, 0, size); |
| memcpy(val, xi->name, name_len); |
| xv = (struct ocfs2_xattr_value_root *) |
| (val + OCFS2_XATTR_SIZE(name_len)); |
| xv->xr_clusters = 0; |
| xv->xr_last_eb_blk = 0; |
| xv->xr_list.l_tree_depth = 0; |
| xv->xr_list.l_count = cpu_to_le16(1); |
| xv->xr_list.l_next_free_rec = 0; |
| |
| ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv, |
| xi->value_len); |
| if (ret < 0) { |
| mlog_errno(ret); |
| return ret; |
| } |
| ret = __ocfs2_xattr_set_value_outside(inode, xv, xi->value, |
| xi->value_len); |
| if (ret < 0) { |
| mlog_errno(ret); |
| return ret; |
| } |
| ret = ocfs2_xattr_update_entry(inode, xi, xs, offs); |
| if (ret < 0) |
| mlog_errno(ret); |
| |
| return ret; |
| } |
| |
| /* |
| * ocfs2_xattr_set_entry_local() |
| * |
| * Set, replace or remove extended attribute in local. |
| */ |
| static void ocfs2_xattr_set_entry_local(struct inode *inode, |
| struct ocfs2_xattr_info *xi, |
| struct ocfs2_xattr_search *xs, |
| struct ocfs2_xattr_entry *last, |
| size_t min_offs) |
| { |
| size_t name_len = strlen(xi->name); |
| int i; |
| |
| if (xi->value && xs->not_found) { |
| /* Insert the new xattr entry. */ |
| le16_add_cpu(&xs->header->xh_count, 1); |
| ocfs2_xattr_set_type(last, xi->name_index); |
| ocfs2_xattr_set_local(last, 1); |
| last->xe_name_len = name_len; |
| } else { |
| void *first_val; |
| void *val; |
| size_t offs, size; |
| |
| first_val = xs->base + min_offs; |
| offs = le16_to_cpu(xs->here->xe_name_offset); |
| val = xs->base + offs; |
| |
| if (le64_to_cpu(xs->here->xe_value_size) > |
| OCFS2_XATTR_INLINE_SIZE) |
| size = OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_ROOT_SIZE; |
| else |
| size = OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); |
| |
| if (xi->value && size == OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_SIZE(xi->value_len)) { |
| /* The old and the new value have the |
| same size. Just replace the value. */ |
| ocfs2_xattr_set_local(xs->here, 1); |
| xs->here->xe_value_size = cpu_to_le64(xi->value_len); |
| /* Clear value bytes. */ |
| memset(val + OCFS2_XATTR_SIZE(name_len), |
| 0, |
| OCFS2_XATTR_SIZE(xi->value_len)); |
| memcpy(val + OCFS2_XATTR_SIZE(name_len), |
| xi->value, |
| xi->value_len); |
| return; |
| } |
| /* Remove the old name+value. */ |
| memmove(first_val + size, first_val, val - first_val); |
| memset(first_val, 0, size); |
| xs->here->xe_name_hash = 0; |
| xs->here->xe_name_offset = 0; |
| ocfs2_xattr_set_local(xs->here, 1); |
| xs->here->xe_value_size = 0; |
| |
| min_offs += size; |
| |
| /* Adjust all value offsets. */ |
| last = xs->header->xh_entries; |
| for (i = 0 ; i < le16_to_cpu(xs->header->xh_count); i++) { |
| size_t o = le16_to_cpu(last->xe_name_offset); |
| |
| if (o < offs) |
| last->xe_name_offset = cpu_to_le16(o + size); |
| last += 1; |
| } |
| |
| if (!xi->value) { |
| /* Remove the old entry. */ |
| last -= 1; |
| memmove(xs->here, xs->here + 1, |
| (void *)last - (void *)xs->here); |
| memset(last, 0, sizeof(struct ocfs2_xattr_entry)); |
| le16_add_cpu(&xs->header->xh_count, -1); |
| } |
| } |
| if (xi->value) { |
| /* Insert the new name+value. */ |
| size_t size = OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_SIZE(xi->value_len); |
| void *val = xs->base + min_offs - size; |
| |
| xs->here->xe_name_offset = cpu_to_le16(min_offs - size); |
| memset(val, 0, size); |
| memcpy(val, xi->name, name_len); |
| memcpy(val + OCFS2_XATTR_SIZE(name_len), |
| xi->value, |
| xi->value_len); |
| xs->here->xe_value_size = cpu_to_le64(xi->value_len); |
| ocfs2_xattr_set_local(xs->here, 1); |
| ocfs2_xattr_hash_entry(inode, xs->header, xs->here); |
| } |
| |
| return; |
| } |
| |
| /* |
| * ocfs2_xattr_set_entry() |
| * |
| * Set extended attribute entry into inode or block. |
| * |
| * If extended attribute value size > OCFS2_XATTR_INLINE_SIZE, |
| * We first insert tree root(ocfs2_xattr_value_root) with set_entry_local(), |
| * then set value in B tree with set_value_outside(). |
| */ |
| static int ocfs2_xattr_set_entry(struct inode *inode, |
| struct ocfs2_xattr_info *xi, |
| struct ocfs2_xattr_search *xs, |
| int flag) |
| { |
| struct ocfs2_xattr_entry *last; |
| struct ocfs2_inode_info *oi = OCFS2_I(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; |
| int free, i, ret; |
| struct ocfs2_xattr_info xi_l = { |
| .name_index = xi->name_index, |
| .name = xi->name, |
| .value = xi->value, |
| .value_len = xi->value_len, |
| }; |
| |
| /* Compute min_offs, last and free space. */ |
| 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 -EFAULT; |
| |
| if (!xs->not_found) { |
| size_t size = 0; |
| if (ocfs2_xattr_is_local(xs->here)) |
| size = OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); |
| else |
| size = OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_ROOT_SIZE; |
| free += (size + sizeof(struct ocfs2_xattr_entry)); |
| } |
| /* Check free space in inode or block */ |
| if (xi->value && xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
| if (free < sizeof(struct ocfs2_xattr_entry) + |
| OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_ROOT_SIZE) { |
| ret = -ENOSPC; |
| goto out; |
| } |
| size_l = OCFS2_XATTR_SIZE(name_len) + OCFS2_XATTR_ROOT_SIZE; |
| xi_l.value = (void *)&def_xv; |
| xi_l.value_len = OCFS2_XATTR_ROOT_SIZE; |
| } else if (xi->value) { |
| if (free < sizeof(struct ocfs2_xattr_entry) + |
| OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_SIZE(xi->value_len)) { |
| ret = -ENOSPC; |
| goto out; |
| } |
| } |
| |
| if (!xs->not_found) { |
| /* For existing extended attribute */ |
| size_t size = OCFS2_XATTR_SIZE(name_len) + |
| OCFS2_XATTR_SIZE(le64_to_cpu(xs->here->xe_value_size)); |
| size_t offs = le16_to_cpu(xs->here->xe_name_offset); |
| void *val = xs->base + offs; |
| |
| 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); |
| if (ret < 0) |
| mlog_errno(ret); |
| goto out; |
| } else if (!ocfs2_xattr_is_local(xs->here)) { |
| /* For existing xattr which has value outside */ |
| struct ocfs2_xattr_value_root *xv = NULL; |
| xv = (struct ocfs2_xattr_value_root *)(val + |
| OCFS2_XATTR_SIZE(name_len)); |
| |
| if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) { |
| /* |
| * If new value need set outside also, |
| * first truncate old value to new value, |
| * then set new value with set_value_outside(). |
| */ |
| ret = ocfs2_xattr_value_truncate(inode, |
| xs->xattr_bh, |
| xv, |
| xi->value_len); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = __ocfs2_xattr_set_value_outside(inode, |
| xv, |
| xi->value, |
| xi->value_len); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = ocfs2_xattr_update_entry(inode, |
| xi, |
| xs, |
| offs); |
| if (ret < 0) |
| mlog_errno(ret); |
| goto out; |
| } else { |
| /* |
| * If new value need set in local, |
| * just trucate old value to zero. |
| */ |
| ret = ocfs2_xattr_value_truncate(inode, |
| xs->xattr_bh, |
| xv, |
| 0); |
| 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; |
| } |
| |
| if (!(flag & OCFS2_INLINE_XATTR_FL)) { |
| /* set extended attribute in external block. */ |
| ret = ocfs2_extend_trans(handle, |
| OCFS2_INODE_UPDATE_CREDITS + |
| 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; |
| } |
| } |
| |
| /* |
| * Set value in local, include set tree root in local. |
| * This is the first step for value size >INLINE_SIZE. |
| */ |
| ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs); |
| |
| if (!(flag & OCFS2_INLINE_XATTR_FL)) { |
| ret = ocfs2_journal_dirty(handle, xs->xattr_bh); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| } |
| |
| if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) && |
| (flag & OCFS2_INLINE_XATTR_FL)) { |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| unsigned int xattrsize = osb->s_xattr_inline_size; |
| |
| /* |
| * Adjust extent record count or inline data size |
| * to reserve space for extended attribute. |
| */ |
| if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| struct ocfs2_inline_data *idata = &di->id2.i_data; |
| le16_add_cpu(&idata->id_count, -xattrsize); |
| } else if (!(ocfs2_inode_is_fast_symlink(inode))) { |
| struct ocfs2_extent_list *el = &di->id2.i_list; |
| le16_add_cpu(&el->l_count, -(xattrsize / |
| sizeof(struct ocfs2_extent_rec))); |
| } |
| di->i_xattr_inline_size = cpu_to_le16(xattrsize); |
| } |
| /* Update xattr flag */ |
| spin_lock(&oi->ip_lock); |
| oi->ip_dyn_features |= flag; |
| di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); |
| spin_unlock(&oi->ip_lock); |
| /* Update inode ctime */ |
| inode->i_ctime = CURRENT_TIME; |
| di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
| di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); |
| |
| ret = ocfs2_journal_dirty(handle, xs->inode_bh); |
| 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); |
| if (ret < 0) { |
| int ret2; |
| |
| mlog_errno(ret); |
| /* |
| * 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); |
| if (ret2 < 0) |
| mlog_errno(ret2); |
| } |
| } |
| out: |
| return ret; |
| |
| } |
| |
| static int ocfs2_remove_value_outside(struct inode*inode, |
| struct buffer_head *bh, |
| struct ocfs2_xattr_header *header) |
| { |
| int ret = 0, i; |
| |
| for (i = 0; i < le16_to_cpu(header->xh_count); i++) { |
| struct ocfs2_xattr_entry *entry = &header->xh_entries[i]; |
| |
| if (!ocfs2_xattr_is_local(entry)) { |
| struct ocfs2_xattr_value_root *xv; |
| void *val; |
| |
| val = (void *)header + |
| 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); |
| if (ret < 0) { |
| mlog_errno(ret); |
| return ret; |
| } |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int ocfs2_xattr_ibody_remove(struct inode *inode, |
| struct buffer_head *di_bh) |
| { |
| |
| struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; |
| struct ocfs2_xattr_header *header; |
| int ret; |
| |
| header = (struct ocfs2_xattr_header *) |
| ((void *)di + inode->i_sb->s_blocksize - |
| le16_to_cpu(di->i_xattr_inline_size)); |
| |
| ret = ocfs2_remove_value_outside(inode, di_bh, header); |
| |
| return ret; |
| } |
| |
| static int ocfs2_xattr_block_remove(struct inode *inode, |
| struct buffer_head *blk_bh) |
| { |
| struct ocfs2_xattr_block *xb; |
| int ret = 0; |
| |
| 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_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_block(osb, block, &blk_bh, |
| OCFS2_BH_CACHED, inode); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| /*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 (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_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; |
| } |
| |
| /* |
| * ocfs2_xattr_remove() |
| * |
| * Free extended attribute resources associated with this inode. |
| */ |
| int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh) |
| { |
| 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; |
| |
| if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
| ret = ocfs2_xattr_ibody_remove(inode, di_bh); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out; |
| } |
| } |
| |
| 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; |
| } |
| } |
| |
| 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, di_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| di->i_xattr_loc = 0; |
| |
| spin_lock(&oi->ip_lock); |
| oi->ip_dyn_features &= ~(OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL); |
| di->i_dyn_features = cpu_to_le16(oi->ip_dyn_features); |
| spin_unlock(&oi->ip_lock); |
| |
| ret = ocfs2_journal_dirty(handle, di_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_has_space_inline(struct inode *inode, |
| struct ocfs2_dinode *di) |
| { |
| struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| unsigned int xattrsize = OCFS2_SB(inode->i_sb)->s_xattr_inline_size; |
| int free; |
| |
| if (xattrsize < OCFS2_MIN_XATTR_INLINE_SIZE) |
| return 0; |
| |
| if (oi->ip_dyn_features & OCFS2_INLINE_DATA_FL) { |
| struct ocfs2_inline_data *idata = &di->id2.i_data; |
| free = le16_to_cpu(idata->id_count) - le64_to_cpu(di->i_size); |
| } else if (ocfs2_inode_is_fast_symlink(inode)) { |
| free = ocfs2_fast_symlink_chars(inode->i_sb) - |
| le64_to_cpu(di->i_size); |
| } else { |
| struct ocfs2_extent_list *el = &di->id2.i_list; |
| free = (le16_to_cpu(el->l_count) - |
| le16_to_cpu(el->l_next_free_rec)) * |
| sizeof(struct ocfs2_extent_rec); |
| } |
| if (free >= xattrsize) |
| return 1; |
| |
| return 0; |
| } |
| |
| /* |
| * ocfs2_xattr_ibody_find() |
| * |
| * Find extended attribute in inode block and |
| * fill search info into struct ocfs2_xattr_search. |
| */ |
| static int ocfs2_xattr_ibody_find(struct inode *inode, |
| int name_index, |
| const char *name, |
| struct ocfs2_xattr_search *xs) |
| { |
| struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; |
| int ret; |
| int has_space = 0; |
| |
| if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) |
| return 0; |
| |
| if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
| down_read(&oi->ip_alloc_sem); |
| has_space = ocfs2_xattr_has_space_inline(inode, di); |
| up_read(&oi->ip_alloc_sem); |
| if (!has_space) |
| return 0; |
| } |
| |
| xs->xattr_bh = xs->inode_bh; |
| xs->end = (void *)di + inode->i_sb->s_blocksize; |
| if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) |
| xs->header = (struct ocfs2_xattr_header *) |
| (xs->end - le16_to_cpu(di->i_xattr_inline_size)); |
| else |
| xs->header = (struct ocfs2_xattr_header *) |
| (xs->end - OCFS2_SB(inode->i_sb)->s_xattr_inline_size); |
| xs->base = (void *)xs->header; |
| xs->here = xs->header->xh_entries; |
| |
| /* Find the named attribute. */ |
| if (oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL) { |
| ret = ocfs2_xattr_find_entry(name_index, name, xs); |
| if (ret && ret != -ENODATA) |
| return ret; |
| xs->not_found = ret; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * ocfs2_xattr_ibody_set() |
| * |
| * Set, replace or remove an extended attribute into inode block. |
| * |
| */ |
| static int ocfs2_xattr_ibody_set(struct inode *inode, |
| struct ocfs2_xattr_info *xi, |
| struct ocfs2_xattr_search *xs) |
| { |
| struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data; |
| int ret; |
| |
| if (inode->i_sb->s_blocksize == OCFS2_MIN_BLOCKSIZE) |
| return -ENOSPC; |
| |
| down_write(&oi->ip_alloc_sem); |
| if (!(oi->ip_dyn_features & OCFS2_INLINE_XATTR_FL)) { |
| if (!ocfs2_xattr_has_space_inline(inode, di)) { |
| ret = -ENOSPC; |
| goto out; |
| } |
| } |
| |
| ret = ocfs2_xattr_set_entry(inode, xi, xs, |
| (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL)); |
| out: |
| up_write(&oi->ip_alloc_sem); |
| |
| return ret; |
| } |
| |
| /* |
| * ocfs2_xattr_block_find() |
| * |
| * Find extended attribute in external block and |
| * fill search info into struct ocfs2_xattr_search. |
| */ |
| static int ocfs2_xattr_block_find(struct inode *inode, |
| int name_index, |
| const char *name, |
| 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; |
| int ret = 0; |
| |
| 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); |
| 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; |
| |
| 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 && ret != -ENODATA) { |
| xs->xattr_bh = NULL; |
| goto cleanup; |
| } |
| xs->not_found = ret; |
| return 0; |
| cleanup: |
| brelse(blk_bh); |
| |
| return ret; |
| } |
| |
| /* |
| * When all the xattrs are deleted from index btree, the ocfs2_xattr_tree |
| * will be erased and ocfs2_xattr_block will have its ocfs2_xattr_header |
| * re-initialized. |
| */ |
| static int ocfs2_restore_xattr_block(struct inode *inode, |
| struct ocfs2_xattr_search *xs) |
| { |
| int ret; |
| handle_t *handle; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| struct ocfs2_xattr_block *xb = |
| (struct ocfs2_xattr_block *)xs->xattr_bh->b_data; |
| struct ocfs2_extent_list *el = &xb->xb_attrs.xb_root.xt_list; |
| u16 xb_flags = le16_to_cpu(xb->xb_flags); |
| |
| BUG_ON(!(xb_flags & OCFS2_XATTR_INDEXED) || |
| le16_to_cpu(el->l_next_free_rec) != 0); |
| |
| handle = ocfs2_start_trans(osb, OCFS2_XATTR_BLOCK_UPDATE_CREDITS); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| handle = NULL; |
| goto out; |
| } |
| |
| ret = ocfs2_journal_access(handle, inode, xs->xattr_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| memset(&xb->xb_attrs, 0, inode->i_sb->s_blocksize - |
| offsetof(struct ocfs2_xattr_block, xb_attrs)); |
| |
| xb->xb_flags = cpu_to_le16(xb_flags & ~OCFS2_XATTR_INDEXED); |
| |
| ocfs2_journal_dirty(handle, xs->xattr_bh); |
| |
| out_commit: |
| ocfs2_commit_trans(osb, handle); |
| out: |
| return ret; |
| } |
| |
| /* |
| * ocfs2_xattr_block_set() |
| * |
| * Set, replace or remove an extended attribute into external block. |
| * |
| */ |
| static int ocfs2_xattr_block_set(struct inode *inode, |
| struct ocfs2_xattr_info *xi, |
| struct ocfs2_xattr_search *xs) |
| { |
| 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; |
| struct ocfs2_xattr_block *xblk = NULL; |
| u16 suballoc_bit_start; |
| u32 num_got; |
| u64 first_blkno; |
| 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); |
| 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; |
| } |
| |
| ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1, |
| &suballoc_bit_start, &num_got, |
| &first_blkno); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| new_bh = sb_getblk(inode->i_sb, first_blkno); |
| 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); |
| goto out_commit; |
| } |
| |
| /* Initialize ocfs2_xattr_block */ |
| xs->xattr_bh = new_bh; |
| xblk = (struct ocfs2_xattr_block *)new_bh->b_data; |
| memset(xblk, 0, inode->i_sb->s_blocksize); |
| strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE); |
| xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num); |
| xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start); |
| xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation); |
| xblk->xb_blkno = cpu_to_le64(first_blkno); |
| |
| xs->header = &xblk->xb_attrs.xb_header; |
| xs->base = (void *)xs->header; |
| 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; |
| } |
| di->i_xattr_loc = cpu_to_le64(first_blkno); |
| ret = ocfs2_journal_dirty(handle, xs->inode_bh); |
| if (ret < 0) |
| mlog_errno(ret); |
| out_commit: |
| ocfs2_commit_trans(osb, handle); |
| out: |
| if (meta_ac) |
| ocfs2_free_alloc_context(meta_ac); |
| if (ret < 0) |
| return ret; |
| } 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, OCFS2_HAS_XATTR_FL); |
| if (!ret || ret != -ENOSPC) |
| goto end; |
| |
| ret = ocfs2_xattr_create_index_block(inode, xs); |
| if (ret) |
| goto end; |
| } |
| |
| ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs); |
| if (!ret && xblk->xb_attrs.xb_root.xt_list.l_next_free_rec == 0) |
| ret = ocfs2_restore_xattr_block(inode, xs); |
| |
| end: |
| |
| return ret; |
| } |
| |
| /* |
| * ocfs2_xattr_set() |
| * |
| * Set, replace or remove an extended attribute for this inode. |
| * value is NULL to remove an existing extended attribute, else either |
| * create or replace an extended attribute. |
| */ |
| int ocfs2_xattr_set(struct inode *inode, |
| int name_index, |
| const char *name, |
| const void *value, |
| size_t value_len, |
| int flags) |
| { |
| struct buffer_head *di_bh = NULL; |
| struct ocfs2_dinode *di; |
| int ret; |
| u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| |
| 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, |
| }; |
| |
| if (!ocfs2_supports_xattr(OCFS2_SB(inode->i_sb))) |
| return -EOPNOTSUPP; |
| |
| ret = ocfs2_inode_lock(inode, &di_bh, 1); |
| 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_write(&OCFS2_I(inode)->ip_xattr_sem); |
| /* |
| * Scan inode and external block to find the same name |
| * extended attribute and collect search infomation. |
| */ |
| 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; |
| } |
| |
| if (xis.not_found && xbs.not_found) { |
| ret = -ENODATA; |
| if (flags & XATTR_REPLACE) |
| goto cleanup; |
| ret = 0; |
| if (!value) |
| goto cleanup; |
| } else { |
| ret = -EEXIST; |
| if (flags & XATTR_CREATE) |
| 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); |
| } |
| } |
| } |
| cleanup: |
| up_write(&OCFS2_I(inode)->ip_xattr_sem); |
| ocfs2_inode_unlock(inode, 1); |
| brelse(di_bh); |
| brelse(xbs.xattr_bh); |
| for (i = 0; i < blk_per_bucket; i++) |
| brelse(xbs.bucket.bhs[i]); |
| |
| 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. |
| * el must be the ocfs2_xattr_header.xb_attrs.xb_root.xt_list. |
| */ |
| static int ocfs2_xattr_get_rec(struct inode *inode, |
| u32 name_hash, |
| u64 *p_blkno, |
| u32 *e_cpos, |
| u32 *num_clusters, |
| struct ocfs2_extent_list *el) |
| { |
| int ret = 0, i; |
| struct buffer_head *eb_bh = NULL; |
| struct ocfs2_extent_block *eb; |
| struct ocfs2_extent_rec *rec = NULL; |
| u64 e_blkno = 0; |
| |
| if (el->l_tree_depth) { |
| ret = ocfs2_find_leaf(inode, el, name_hash, &eb_bh); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| eb = (struct ocfs2_extent_block *) eb_bh->b_data; |
| el = &eb->h_list; |
| |
| if (el->l_tree_depth) { |
| ocfs2_error(inode->i_sb, |
| "Inode %lu has non zero tree depth in " |
| "xattr tree block %llu\n", inode->i_ino, |
| (unsigned long long)eb_bh->b_blocknr); |
| ret = -EROFS; |
| goto out; |
| } |
| } |
| |
| for (i = le16_to_cpu(el->l_next_free_rec) - 1; i >= 0; i--) { |
| rec = &el->l_recs[i]; |
| |
| if (le32_to_cpu(rec->e_cpos) <= name_hash) { |
| e_blkno = le64_to_cpu(rec->e_blkno); |
| break; |
| } |
| } |
| |
| if (!e_blkno) { |
| ocfs2_error(inode->i_sb, "Inode %lu has bad extent " |
| "record (%u, %u, 0) in xattr", inode->i_ino, |
| le32_to_cpu(rec->e_cpos), |
| ocfs2_rec_clusters(el, rec)); |
| ret = -EROFS; |
| goto out; |
| } |
| |
| *p_blkno = le64_to_cpu(rec->e_blkno); |
| *num_clusters = le16_to_cpu(rec->e_leaf_clusters); |
| if (e_cpos) |
| *e_cpos = le32_to_cpu(rec->e_cpos); |
| out: |
| brelse(eb_bh); |
| return ret; |
| } |
| |
| typedef int (xattr_bucket_func)(struct inode *inode, |
| struct ocfs2_xattr_bucket *bucket, |
| void *para); |
| |
| static int ocfs2_find_xe_in_bucket(struct inode *inode, |
| struct buffer_head *header_bh, |
| int name_index, |
| const char *name, |
| u32 name_hash, |
| u16 *xe_index, |
| 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; |
| size_t name_len = strlen(name); |
| struct ocfs2_xattr_entry *xe = NULL; |
| struct buffer_head *name_bh = NULL; |
| char *xe_name; |
| |
| /* |
| * We don't use binary search in the bucket because there |
| * may be multiple entries with the same name hash. |
| */ |
| for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
| xe = &xh->xh_entries[i]; |
| |
| if (name_hash > le32_to_cpu(xe->xe_name_hash)) |
| continue; |
| else if (name_hash < le32_to_cpu(xe->xe_name_hash)) |
| break; |
| |
| cmp = name_index - ocfs2_xattr_get_type(xe); |
| if (!cmp) |
| cmp = name_len - xe->xe_name_len; |
| if (cmp) |
| continue; |
| |
| ret = ocfs2_xattr_bucket_get_name_value(inode, |
| xh, |
| i, |
| &block_off, |
| &new_offset); |
| if (ret) { |
| mlog_errno(ret); |
| 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_index = i; |
| *found = 1; |
| ret = 0; |
| break; |
| } |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Find the specified xattr entry in a series of buckets. |
| * This series start from p_blkno and last for num_clusters. |
| * The ocfs2_xattr_header.xh_num_buckets of the first bucket contains |
| * the num of the valid buckets. |
| * |
| * Return the buffer_head this xattr should reside in. And if the xattr's |
| * hash is in the gap of 2 buckets, return the lower bucket. |
| */ |
| static int ocfs2_xattr_bucket_find(struct inode *inode, |
| int name_index, |
| const char *name, |
| u32 name_hash, |
| u64 p_blkno, |
| u32 first_hash, |
| u32 num_clusters, |
| 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; |
| u32 last_hash; |
| u64 blkno; |
| |
| ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, |
| &bh, OCFS2_BH_CACHED, inode); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| xh = (struct ocfs2_xattr_header *)bh->b_data; |
| 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; |
| |
| blkno = p_blkno + bucket * blk_per_bucket; |
| |
| ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), blkno, |
| &bh, OCFS2_BH_CACHED, inode); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| xh = (struct ocfs2_xattr_header *)bh->b_data; |
| xe = &xh->xh_entries[0]; |
| if (name_hash < le32_to_cpu(xe->xe_name_hash)) { |
| high_bucket = bucket - 1; |
| continue; |
| } |
| |
| /* |
| * Check whether the hash of the last entry in our |
| * bucket is larger than the search one. for an empty |
| * bucket, the last one is also the first one. |
| */ |
| 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; |
| |
| if (name_hash > le32_to_cpu(xe->xe_name_hash)) { |
| low_bucket = bucket + 1; |
| continue; |
| } |
| |
| /* the searched xattr should reside in this bucket if exists. */ |
| ret = ocfs2_find_xe_in_bucket(inode, lower_bh, |
| name_index, name, name_hash, |
| &index, &found); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| break; |
| } |
| |
| /* |
| * Record the bucket we have found. |
| * 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; |
| } |
| 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->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); |
| } else |
| ret = -ENODATA; |
| |
| out: |
| brelse(bh); |
| brelse(lower_bh); |
| return ret; |
| } |
| |
| static int ocfs2_xattr_index_block_find(struct inode *inode, |
| struct buffer_head *root_bh, |
| int name_index, |
| const char *name, |
| struct ocfs2_xattr_search *xs) |
| { |
| int ret; |
| struct ocfs2_xattr_block *xb = |
| (struct ocfs2_xattr_block *)root_bh->b_data; |
| struct ocfs2_xattr_tree_root *xb_root = &xb->xb_attrs.xb_root; |
| 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); |
| |
| if (le16_to_cpu(el->l_next_free_rec) == 0) |
| return -ENODATA; |
| |
| mlog(0, "find xattr %s, hash = %u, index = %d in xattr tree\n", |
| name, name_hash, name_index); |
| |
| ret = ocfs2_xattr_get_rec(inode, name_hash, &p_blkno, &first_hash, |
| &num_clusters, el); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| 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); |
| |
| ret = ocfs2_xattr_bucket_find(inode, name_index, name, name_hash, |
| p_blkno, first_hash, num_clusters, xs); |
| |
| out: |
| return ret; |
| } |
| |
| static int ocfs2_iterate_xattr_buckets(struct inode *inode, |
| u64 blkno, |
| u32 clusters, |
| xattr_bucket_func *func, |
| void *para) |
| { |
| int i, j, ret = 0; |
| int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| u32 bpc = ocfs2_xattr_buckets_per_cluster(OCFS2_SB(inode->i_sb)); |
| u32 num_buckets = clusters * bpc; |
| struct ocfs2_xattr_bucket bucket; |
| |
| memset(&bucket, 0, sizeof(bucket)); |
| |
| mlog(0, "iterating xattr buckets in %u clusters starting from %llu\n", |
| clusters, 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); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| 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); |
| |
| mlog(0, "iterating xattr bucket %llu, first hash %u\n", blkno, |
| le32_to_cpu(bucket.xh->xh_entries[0].xe_name_hash)); |
| if (func) { |
| ret = func(inode, &bucket, para); |
| if (ret) { |
| mlog_errno(ret); |
| break; |
| } |
| } |
| |
| for (j = 0; j < blk_per_bucket; j++) |
| brelse(bucket.bhs[j]); |
| memset(&bucket, 0, sizeof(bucket)); |
| } |
| |
| out: |
| for (j = 0; j < blk_per_bucket; j++) |
| brelse(bucket.bhs[j]); |
| |
| return ret; |
| } |
| |
| struct ocfs2_xattr_tree_list { |
| char *buffer; |
| size_t buffer_size; |
| }; |
| |
| static int ocfs2_xattr_bucket_get_name_value(struct inode *inode, |
| struct ocfs2_xattr_header *xh, |
| int index, |
| int *block_off, |
| int *new_offset) |
| { |
| u16 name_offset; |
| |
| if (index < 0 || index >= le16_to_cpu(xh->xh_count)) |
| return -EINVAL; |
| |
| name_offset = le16_to_cpu(xh->xh_entries[index].xe_name_offset); |
| |
| *block_off = name_offset >> inode->i_sb->s_blocksize_bits; |
| *new_offset = name_offset % inode->i_sb->s_blocksize; |
| |
| return 0; |
| } |
| |
| static int ocfs2_list_xattr_bucket(struct inode *inode, |
| struct ocfs2_xattr_bucket *bucket, |
| void *para) |
| { |
| int ret = 0; |
| struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para; |
| size_t size; |
| int i, block_off, new_offset; |
| |
| 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)); |
| |
| if (handler) { |
| ret = ocfs2_xattr_bucket_get_name_value(inode, |
| bucket->xh, |
| 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; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int ocfs2_xattr_tree_list_index_block(struct inode *inode, |
| struct ocfs2_xattr_tree_root *xt, |
| char *buffer, |
| size_t buffer_size) |
| { |
| struct ocfs2_extent_list *el = &xt->xt_list; |
| int ret = 0; |
| u32 name_hash = UINT_MAX, e_cpos = 0, num_clusters = 0; |
| u64 p_blkno = 0; |
| struct ocfs2_xattr_tree_list xl = { |
| .buffer = buffer, |
| .buffer_size = buffer_size, |
| }; |
| |
| 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_list_xattr_bucket, |
| &xl); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| if (e_cpos == 0) |
| break; |
| |
| name_hash = e_cpos - 1; |
| } |
| |
| ret = buffer_size - xl.buffer_size; |
| 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. |
| * 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 buffer_head *xh_bh, |
| struct buffer_head *data_bh) |
| { |
| int i, blocksize = inode->i_sb->s_blocksize; |
| 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 = |
| (struct ocfs2_xattr_header *)xh_bh->b_data; |
| u16 count = le16_to_cpu(xb_xh->xh_count); |
| char *target = xh_bh->b_data, *src = xb_bh->b_data; |
| |
| mlog(0, "cp xattr from block %llu to bucket %llu\n", |
| (unsigned long long)xb_bh->b_blocknr, |
| (unsigned long long)xh_bh->b_blocknr); |
| |
| memset(xh_bh->b_data, 0, blocksize); |
| if (data_bh) |
| memset(data_bh->b_data, 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. */ |
| if (data_bh) |
| target = data_bh->b_data; |
| 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 = xh_bh->b_data; |
| 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 int ocfs2_xattr_update_xattr_search(struct inode *inode, |
| struct ocfs2_xattr_search *xs, |
| struct buffer_head *old_bh, |
| struct buffer_head *new_bh) |
| { |
| int ret = 0; |
| 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, blocksize = inode->i_sb->s_blocksize; |
| u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| |
| xs->bucket.bhs[0] = new_bh; |
| get_bh(new_bh); |
| xs->bucket.xh = (struct ocfs2_xattr_header *)xs->bucket.bhs[0]->b_data; |
| xs->header = xs->bucket.xh; |
| |
| xs->base = new_bh->b_data; |
| xs->end = xs->base + inode->i_sb->s_blocksize; |
| |
| if (!xs->not_found) { |
| if (OCFS2_XATTR_BUCKET_SIZE != blocksize) { |
| 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); |
| return ret; |
| } |
| |
| i = xs->here - old_xh->xh_entries; |
| xs->here = &xs->header->xh_entries[i]; |
| } |
| } |
| |
| return ret; |
| } |
| |
| static int ocfs2_xattr_create_index_block(struct inode *inode, |
| struct ocfs2_xattr_search *xs) |
| { |
| int ret, credits = OCFS2_SUBALLOC_ALLOC; |
| u32 bit_off, len; |
| u64 blkno; |
| handle_t *handle; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| struct ocfs2_inode_info *oi = OCFS2_I(inode); |
| struct ocfs2_alloc_context *data_ac; |
| struct buffer_head *xh_bh = NULL, *data_bh = NULL; |
| 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); |
| u16 bpb = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| |
| mlog(0, "create xattr index block for %llu\n", |
| (unsigned long long)xb_bh->b_blocknr); |
| |
| BUG_ON(xb_flags & OCFS2_XATTR_INDEXED); |
| |
| ret = ocfs2_reserve_clusters(osb, 1, &data_ac); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| /* |
| * 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); |
| |
| /* |
| * 3 more credits, one for xattr block update, one for the 1st block |
| * of the new xattr bucket and one for the value/data. |
| */ |
| credits += 3; |
| handle = ocfs2_start_trans(osb, credits); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| mlog_errno(ret); |
| goto out_sem; |
| } |
| |
| ret = ocfs2_journal_access(handle, inode, xb_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| ret = ocfs2_claim_clusters(osb, handle, data_ac, 1, &bit_off, &len); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| /* |
| * 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", blkno); |
| |
| xh_bh = sb_getblk(inode->i_sb, blkno); |
| if (!xh_bh) { |
| ret = -EIO; |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| ocfs2_set_new_buffer_uptodate(inode, xh_bh); |
| |
| ret = ocfs2_journal_access(handle, inode, xh_bh, |
| OCFS2_JOURNAL_ACCESS_CREATE); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| if (bpb > 1) { |
| data_bh = sb_getblk(inode->i_sb, blkno + bpb - 1); |
| if (!data_bh) { |
| ret = -EIO; |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| ocfs2_set_new_buffer_uptodate(inode, data_bh); |
| |
| ret = ocfs2_journal_access(handle, inode, data_bh, |
| OCFS2_JOURNAL_ACCESS_CREATE); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| } |
| |
| ocfs2_cp_xattr_block_to_bucket(inode, xb_bh, xh_bh, data_bh); |
| |
| ocfs2_journal_dirty(handle, xh_bh); |
| if (data_bh) |
| ocfs2_journal_dirty(handle, data_bh); |
| |
| ocfs2_xattr_update_xattr_search(inode, xs, xb_bh, xh_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); |
| |
| ret = ocfs2_journal_dirty(handle, xb_bh); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| out_commit: |
| ocfs2_commit_trans(osb, handle); |
| |
| out_sem: |
| up_write(&oi->ip_alloc_sem); |
| |
| out: |
| if (data_ac) |
| ocfs2_free_alloc_context(data_ac); |
| |
| brelse(xh_bh); |
| brelse(data_bh); |
| |
| 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, |
| 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->bhs[0]->b_blocknr; |
| u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| u16 xh_free_start; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| size_t blocksize = inode->i_sb->s_blocksize; |
| handle_t *handle; |
| struct buffer_head **bhs; |
| struct ocfs2_xattr_entry *xe; |
| |
| bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, |
| GFP_NOFS); |
| if (!bhs) |
| return -ENOMEM; |
| |
| ret = ocfs2_read_blocks(osb, blkno, blk_per_bucket, bhs, |
| OCFS2_BH_CACHED, inode); |
| if (ret) |
| goto out; |
| |
| /* |
| * 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 < blk_per_bucket; i++, buf += blocksize) |
| memcpy(buf, bhs[i]->b_data, blocksize); |
| |
| handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), blk_per_bucket); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| for (i = 0; i < blk_per_bucket; i++) { |
| ret = ocfs2_journal_access(handle, inode, bhs[i], |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto commit; |
| } |
| } |
| |
| 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", |
| 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 commit; |
| |
| 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 < blk_per_bucket; i++, buf += blocksize) { |
| memcpy(bhs[i]->b_data, buf, blocksize); |
| ocfs2_journal_dirty(handle, bhs[i]); |
| } |
| |
| commit: |
| ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| out: |
| |
| if (bhs) { |
| for (i = 0; i < blk_per_bucket; i++) |
| brelse(bhs[i]); |
| } |
| kfree(bhs); |
| |
| 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", |
| prev_blkno, 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; |
| 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(osb, prev_blkno, |
| &old_bh, OCFS2_BH_CACHED, inode); |
| 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; |
| } |
| |
| static int ocfs2_read_xattr_bucket(struct inode *inode, |
| u64 blkno, |
| struct buffer_head **bhs, |
| int new) |
| { |
| int ret = 0; |
| u16 i, blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| |
| if (!new) |
| return ocfs2_read_blocks(OCFS2_SB(inode->i_sb), blkno, |
| blk_per_bucket, bhs, |
| OCFS2_BH_CACHED, inode); |
| |
| for (i = 0; i < blk_per_bucket; i++) { |
| bhs[i] = sb_getblk(inode->i_sb, blkno + i); |
| if (bhs[i] == NULL) { |
| ret = -EIO; |
| mlog_errno(ret); |
| break; |
| } |
| ocfs2_set_new_buffer_uptodate(inode, bhs[i]); |
| } |
| |
| return ret; |
| } |
| |
| /* |
| * Move half num of the xattrs in old bucket(blk) to new bucket(new_blk). |
| * first_hash will record the 1st hash of the new bucket. |
| */ |
| static int ocfs2_half_xattr_bucket(struct inode *inode, |
| handle_t *handle, |
| u64 blk, |
| u64 new_blk, |
| u32 *first_hash, |
| int new_bucket_head) |
| { |
| int ret, i; |
| u16 count, start, len, name_value_len, xe_len, name_offset; |
| u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| struct buffer_head **s_bhs, **t_bhs = NULL; |
| struct ocfs2_xattr_header *xh; |
| struct ocfs2_xattr_entry *xe; |
| int blocksize = inode->i_sb->s_blocksize; |
| |
| mlog(0, "move half of xattrs from bucket %llu to %llu\n", |
| blk, new_blk); |
| |
| s_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS); |
| if (!s_bhs) |
| return -ENOMEM; |
| |
| ret = ocfs2_read_xattr_bucket(inode, blk, s_bhs, 0); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = ocfs2_journal_access(handle, inode, s_bhs[0], |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| t_bhs = kcalloc(blk_per_bucket, sizeof(struct buffer_head *), GFP_NOFS); |
| if (!t_bhs) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = ocfs2_read_xattr_bucket(inode, new_blk, t_bhs, new_bucket_head); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| for (i = 0; i < blk_per_bucket; i++) { |
| ret = ocfs2_journal_access(handle, inode, t_bhs[i], |
| OCFS2_JOURNAL_ACCESS_CREATE); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| } |
| |
| /* copy the whole bucket to the new first. */ |
| for (i = 0; i < blk_per_bucket; i++) |
| memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize); |
| |
| /* update the new bucket. */ |
| xh = (struct ocfs2_xattr_header *)t_bhs[0]->b_data; |
| count = le16_to_cpu(xh->xh_count); |
| start = count / 2; |
| |
| /* |
| * 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 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; |
| |
| for (i = 0; i < blk_per_bucket; i++) { |
| ocfs2_journal_dirty(handle, t_bhs[i]); |
| if (ret) |
| mlog_errno(ret); |
| } |
| |
| /* 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. |
| * Please note that the entry has been sorted already above. |
| */ |
| xh = (struct ocfs2_xattr_header *)s_bhs[0]->b_data; |
| 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_journal_dirty(handle, s_bhs[0]); |
| if (ret) |
| mlog_errno(ret); |
| |
| out: |
| if (s_bhs) { |
| for (i = 0; i < blk_per_bucket; i++) |
| brelse(s_bhs[i]); |
| } |
| kfree(s_bhs); |
| |
| if (t_bhs) { |
| for (i = 0; i < blk_per_bucket; i++) |
| brelse(t_bhs[i]); |
| } |
| kfree(t_bhs); |
| |
| 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, i; |
| int blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| int blocksize = inode->i_sb->s_blocksize; |
| struct buffer_head **s_bhs, **t_bhs = NULL; |
| |
| BUG_ON(s_blkno == t_blkno); |
| |
| mlog(0, "cp bucket %llu to %llu, target is %d\n", |
| s_blkno, t_blkno, t_is_new); |
| |
| s_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, |
| GFP_NOFS); |
| if (!s_bhs) |
| return -ENOMEM; |
| |
| ret = ocfs2_read_xattr_bucket(inode, s_blkno, s_bhs, 0); |
| if (ret) |
| goto out; |
| |
| t_bhs = kzalloc(sizeof(struct buffer_head *) * blk_per_bucket, |
| GFP_NOFS); |
| if (!t_bhs) { |
| ret = -ENOMEM; |
| goto out; |
| } |
| |
| ret = ocfs2_read_xattr_bucket(inode, t_blkno, t_bhs, t_is_new); |
| if (ret) |
| goto out; |
| |
| for (i = 0; i < blk_per_bucket; i++) { |
| ret = ocfs2_journal_access(handle, inode, t_bhs[i], |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret) |
| goto out; |
| } |
| |
| for (i = 0; i < blk_per_bucket; i++) { |
| memcpy(t_bhs[i]->b_data, s_bhs[i]->b_data, blocksize); |
| ocfs2_journal_dirty(handle, t_bhs[i]); |
| } |
| |
| out: |
| if (s_bhs) { |
| for (i = 0; i < blk_per_bucket; i++) |
| brelse(s_bhs[i]); |
| } |
| kfree(s_bhs); |
| |
| if (t_bhs) { |
| for (i = 0; i < blk_per_bucket; i++) |
| brelse(t_bhs[i]); |
| } |
| kfree(t_bhs); |
| |
| return ret; |
| } |
| |
| /* |
| * Copy one xattr cluster from src_blk to to_blk. |
| * The to_blk will become the first bucket header of the cluster, so its |
| * xh_num_buckets will be initialized as the bucket num in the cluster. |
| */ |
| 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 num_buckets = ocfs2_xattr_buckets_per_cluster(osb); |
| struct buffer_head *bh = NULL; |
| struct ocfs2_xattr_header *xh; |
| u64 to_blk_start = to_blk; |
| |
| mlog(0, "cp xattrs from cluster %llu to %llu\n", src_blk, to_blk); |
| |
| /* |
| * We need to update the new cluster and 1 more for the update of |
| * the 1st bucket of the previous extent rec. |
| */ |
| credits = bpc + 1; |
| ret = ocfs2_extend_trans(handle, credits); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = ocfs2_journal_access(handle, inode, first_bh, |
| 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, to_blk, 1); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| src_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| to_blk += ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| } |
| |
| /* update the old bucket header. */ |
| xh = (struct ocfs2_xattr_header *)first_bh->b_data; |
| le16_add_cpu(&xh->xh_num_buckets, -num_buckets); |
| |
| ocfs2_journal_dirty(handle, first_bh); |
| |
| /* update the new bucket header. */ |
| ret = ocfs2_read_block(osb, to_blk_start, &bh, OCFS2_BH_CACHED, inode); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = ocfs2_journal_access(handle, inode, bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| xh = (struct ocfs2_xattr_header *)bh->b_data; |
| xh->xh_num_buckets = cpu_to_le16(num_buckets); |
| |
| ocfs2_journal_dirty(handle, bh); |
| |
| if (first_hash) |
| *first_hash = le32_to_cpu(xh->xh_entries[0].xe_name_hash); |
| out: |
| brelse(bh); |
| return ret; |
| } |
| |
| /* |
| * Move half of the 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_half_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; |
| |
| 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_half_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", |
| prev_blk, prev_clusters, 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_half_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) |
| { |
| int ret, credits; |
| 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 = NULL; |
| struct ocfs2_alloc_context *data_ac = NULL; |
| struct ocfs2_alloc_context *meta_ac = NULL; |
| 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, prev_blkno); |
| |
| ocfs2_init_xattr_tree_extent_tree(&et, inode, root_bh); |
| |
| ret = ocfs2_lock_allocators(inode, &et, clusters_to_add, 0, |
| &data_ac, &meta_ac); |
| if (ret) { |
| mlog_errno(ret); |
| goto leave; |
| } |
| |
| credits = ocfs2_calc_extend_credits(osb->sb, et.et_root_el, |
| clusters_to_add); |
| handle = ocfs2_start_trans(osb, credits); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(ret); |
| goto leave; |
| } |
| |
| 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, 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; |
| } |
| } |
| |
| if (handle->h_buffer_credits < credits) { |
| /* |
| * The journal has been restarted before, and don't |
| * have enough space for the insertion, so extend it |
| * here. |
| */ |
| ret = ocfs2_extend_trans(handle, credits); |
| if (ret) { |
| mlog_errno(ret); |
| goto leave; |
| } |
| } |
| mlog(0, "Insert %u clusters at block %llu for xattr at %u\n", |
| num_bits, block, v_start); |
| ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block, |
| num_bits, 0, meta_ac); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto leave; |
| } |
| |
| ret = ocfs2_journal_dirty(handle, root_bh); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto leave; |
| } |
| |
| leave: |
| if (handle) |
| ocfs2_commit_trans(osb, handle); |
| if (data_ac) |
| ocfs2_free_alloc_context(data_ac); |
| if (meta_ac) |
| ocfs2_free_alloc_context(meta_ac); |
| |
| return ret; |
| } |
| |
| /* |
| * Extend a new xattr bucket and move xattrs to the end one by one until |
| * We meet with start_bh. Only move half of the xattrs to the bucket after it. |
| */ |
| static int ocfs2_extend_xattr_bucket(struct inode *inode, |
| struct buffer_head *first_bh, |
| struct buffer_head *start_bh, |
| 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 start_blk = start_bh->b_blocknr, end_blk; |
| u32 num_buckets = num_clusters * ocfs2_xattr_buckets_per_cluster(osb); |
| handle_t *handle; |
| struct ocfs2_xattr_header *first_xh = |
| (struct ocfs2_xattr_header *)first_bh->b_data; |
| u16 bucket = le16_to_cpu(first_xh->xh_num_buckets); |
| |
| mlog(0, "extend xattr bucket in %llu, xattr extend rec starting " |
| "from %llu, len = %u\n", start_blk, |
| (unsigned long long)first_bh->b_blocknr, num_clusters); |
| |
| BUG_ON(bucket >= num_buckets); |
| |
| end_blk = first_bh->b_blocknr + (bucket - 1) * blk_per_bucket; |
| |
| /* |
| * We will touch all the buckets after the start_bh(include it). |
| * Add one more bucket and modify the first_bh. |
| */ |
| credits = end_blk - start_blk + 2 * blk_per_bucket + 1; |
| handle = ocfs2_start_trans(osb, credits); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = ocfs2_journal_access(handle, inode, first_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret) { |
| mlog_errno(ret); |
| goto commit; |
| } |
| |
| while (end_blk != start_blk) { |
| ret = ocfs2_cp_xattr_bucket(inode, handle, end_blk, |
| end_blk + blk_per_bucket, 0); |
| if (ret) |
| goto commit; |
| end_blk -= blk_per_bucket; |
| } |
| |
| /* Move half of the xattr in start_blk to the next bucket. */ |
| ret = ocfs2_half_xattr_bucket(inode, handle, start_blk, |
| start_blk + blk_per_bucket, NULL, 0); |
| |
| le16_add_cpu(&first_xh->xh_num_buckets, 1); |
| ocfs2_journal_dirty(handle, first_bh); |
| |
| commit: |
| ocfs2_commit_trans(osb, handle); |
| 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_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; |
| |
| mlog(0, "Add new xattr bucket starting form %llu\n", |
| (unsigned long long)header_bh->b_blocknr); |
| |
| /* |
| * 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(osb, p_blkno, |
| &first_bh, OCFS2_BH_CACHED, inode); |
| 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); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| } |
| |
| if (extend) |
| ret = ocfs2_extend_xattr_bucket(inode, |
| first_bh, |
| header_bh, |
| num_clusters); |
| if (ret) |
| mlog_errno(ret); |
| out: |
| brelse(first_bh); |
| brelse(header_bh); |
| 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->bhs[block_off]->b_data + 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; |
| } |
| |
| static int ocfs2_xattr_bucket_handle_journal(struct inode *inode, |
| handle_t *handle, |
| struct ocfs2_xattr_search *xs, |
| struct buffer_head **bhs, |
| u16 bh_num) |
| { |
| int ret = 0, off, block_off; |
| struct ocfs2_xattr_entry *xe = xs->here; |
| |
| /* |
| * First calculate all the blocks we should journal_access |
| * and journal_dirty. The first block should always be touched. |
| */ |
| ret = ocfs2_journal_dirty(handle, bhs[0]); |
| if (ret) |
| mlog_errno(ret); |
| |
| /* calc the data. */ |
| off = le16_to_cpu(xe->xe_name_offset); |
| block_off = off >> inode->i_sb->s_blocksize_bits; |
| ret = ocfs2_journal_dirty(handle, bhs[block_off]); |
| if (ret) |
| mlog_errno(ret); |
| |
| return ret; |
| } |
| |
| /* |
| * 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, |
| struct ocfs2_xattr_info *xi, |
| struct ocfs2_xattr_search *xs, |
| u32 name_hash, |
| int local) |
| { |
| int i, ret; |
| handle_t *handle = NULL; |
| u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| |
| mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n", |
| (unsigned long)xi->value_len, xi->name_index, |
| (unsigned long long)xs->bucket.bhs[0]->b_blocknr); |
| |
| if (!xs->bucket.bhs[1]) { |
| ret = ocfs2_read_blocks(osb, |
| 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; |
| } |
| } |
| |
| handle = ocfs2_start_trans(osb, blk_per_bucket); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| handle = NULL; |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| for (i = 0; i < blk_per_bucket; i++) { |
| ret = ocfs2_journal_access(handle, inode, xs->bucket.bhs[i], |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out; |
| } |
| } |
| |
| ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local); |
| |
| /*Only dirty the blocks we have touched in set xattr. */ |
| ret = ocfs2_xattr_bucket_handle_journal(inode, handle, xs, |
| xs->bucket.bhs, blk_per_bucket); |
| if (ret) |
| mlog_errno(ret); |
| out: |
| ocfs2_commit_trans(osb, handle); |
| |
| return ret; |
| } |
| |
| static int ocfs2_xattr_value_update_size(struct inode *inode, |
| struct buffer_head *xe_bh, |
| struct ocfs2_xattr_entry *xe, |
| u64 new_size) |
| { |
| int ret; |
| struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
| handle_t *handle = NULL; |
| |
| handle = ocfs2_start_trans(osb, 1); |
| if (handle == NULL) { |
| ret = -ENOMEM; |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = ocfs2_journal_access(handle, inode, xe_bh, |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| xe->xe_value_size = cpu_to_le64(new_size); |
| |
| ret = ocfs2_journal_dirty(handle, xe_bh); |
| if (ret < 0) |
| mlog_errno(ret); |
| |
| out_commit: |
| ocfs2_commit_trans(osb, handle); |
| 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 buffer_head *header_bh, |
| int xe_off, |
| int len) |
| { |
| 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 = |
| (struct ocfs2_xattr_header *)header_bh->b_data; |
| 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_blk += header_bh->b_blocknr; |
| |
| ret = ocfs2_read_block(OCFS2_SB(inode->i_sb), value_blk, |
| &value_bh, OCFS2_BH_CACHED, inode); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| xv = (struct ocfs2_xattr_value_root *) |
| (value_bh->b_data + offset % blocksize); |
| |
| mlog(0, "truncate %u in xattr bucket %llu to %d bytes.\n", |
| xe_off, (unsigned long long)header_bh->b_blocknr, len); |
| ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = ocfs2_xattr_value_update_size(inode, header_bh, xe, len); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| out: |
| brelse(value_bh); |
| return ret; |
| } |
| |
| static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode, |
| struct ocfs2_xattr_search *xs, |
| int len) |
| { |
| 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.bhs[0] || !xe || ocfs2_xattr_is_local(xe)); |
| |
| offset = xe - xh->xh_entries; |
| ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket.bhs[0], |
| offset, len); |
| if (ret) |
| mlog_errno(ret); |
| |
| return ret; |
| } |
| |
| static int ocfs2_xattr_bucket_set_value_outside(struct inode *inode, |
| 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, 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); |
| if (handle == NULL) { |
| 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, |
| struct ocfs2_xattr_search *xs) |
| { |
| handle_t *handle = NULL; |
| struct ocfs2_xattr_header *xh = xs->bucket.xh; |
| struct ocfs2_xattr_entry *last = &xh->xh_entries[ |
| le16_to_cpu(xh->xh_count) - 1]; |
| int ret = 0; |
| |
| handle = ocfs2_start_trans((OCFS2_SB(inode->i_sb)), 1); |
| if (IS_ERR(handle)) { |
| ret = PTR_ERR(handle); |
| mlog_errno(ret); |
| return; |
| } |
| |
| ret = ocfs2_journal_access(handle, inode, xs->bucket.bhs[0], |
| OCFS2_JOURNAL_ACCESS_WRITE); |
| if (ret) { |
| mlog_errno(ret); |
| goto out_commit; |
| } |
| |
| /* 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); |
| |
| ret = ocfs2_journal_dirty(handle, xs->bucket.bhs[0]); |
| if (ret < 0) |
| mlog_errno(ret); |
| out_commit: |
| ocfs2_commit_trans(OCFS2_SB(inode->i_sb), handle); |
| } |
| |
| /* |
| * 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) |
| { |
| 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_hash_by_name(inode, |
| xi->name_index, 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); |
| 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, 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); |
| 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, xs); |
| } |
| goto out; |
| } |
| |
| set_value_outside: |
| ret = ocfs2_xattr_bucket_set_value_outside(inode, xs, val, value_len); |
| out: |
| return ret; |
| } |
| |
| /* check whether the xattr bucket is filled up with the same hash value. */ |
| static int ocfs2_check_xattr_bucket_collision(struct inode *inode, |
| struct ocfs2_xattr_bucket *bucket) |
| { |
| struct ocfs2_xattr_header *xh = bucket->xh; |
| |
| 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->bhs[0]->b_blocknr, |
| 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_header *xh; |
| struct ocfs2_xattr_entry *xe; |
| u16 count, header_size, xh_free_start; |
| int i, 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; |
| u16 blk_per_bucket = ocfs2_blocks_per_xattr_bucket(inode->i_sb); |
| |
| 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)xs->bucket.bhs[0]->b_blocknr, |
| 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)xs->bucket.bhs[0]->b_blocknr, |
| free, need, max_free, le16_to_cpu(xh->xh_free_start), |
| le16_to_cpu(xh->xh_name_value_len)); |
| |
| if (free < need || 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, &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); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| ret = ocfs2_add_new_xattr_bucket(inode, |
| xs->xattr_bh, |
| xs->bucket.bhs[0]); |
| if (ret) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| for (i = 0; i < blk_per_bucket; i++) |
| brelse(xs->bucket.bhs[i]); |
| |
| memset(&xs->bucket, 0, sizeof(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); |
| 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; |
| u16 i; |
| struct ocfs2_xattr_entry *xe; |
| |
| for (i = 0; i < le16_to_cpu(xh->xh_count); i++) { |
| xe = &xh->xh_entries[i]; |
| if (ocfs2_xattr_is_local(xe)) |
| continue; |
| |
| ret = ocfs2_xattr_bucket_value_truncate(inode, |
| bucket->bhs[0], |
| i, 0); |
| if (ret) { |
| mlog_errno(ret); |
| break; |
| } |
| } |
| |
| 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; |
| } |