![Tao Ma](/assets/img/avatar_default.png)
Ocfs2 breaks up xattr index tree leaves into 4k regions, called buckets. Attributes are stored within a given bucket, depending on hash value. After a discussion with Mark, we decided that the per-bucket index (xe_entry[]) would only exist in the 1st block of a bucket. Likewise, name/value pairs will not straddle more than one block. This allows the majority of operations to work directly on the buffer heads in a leaf block. This patch adds code to iterate the buckets in an EA. A new abstration of ocfs2_xattr_bucket is added. It records the bhs in this bucket and ocfs2_xattr_header. This keeps the code neat, improving readibility. Signed-off-by: Tao Ma <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
2173 lines
52 KiB
C
2173 lines
52 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* xattr.c
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*
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* Copyright (C) 2008 Oracle. All rights reserved.
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*
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* CREDITS:
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* Lots of code in this file is taken from ext3.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/capability.h>
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/highmem.h>
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#include <linux/pagemap.h>
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#include <linux/uio.h>
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#include <linux/sched.h>
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#include <linux/splice.h>
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#include <linux/mount.h>
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#include <linux/writeback.h>
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#include <linux/falloc.h>
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#define MLOG_MASK_PREFIX ML_XATTR
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#include <cluster/masklog.h>
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#include "ocfs2.h"
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#include "alloc.h"
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#include "dlmglue.h"
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#include "file.h"
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#include "symlink.h"
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#include "sysfile.h"
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#include "inode.h"
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#include "journal.h"
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#include "ocfs2_fs.h"
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#include "suballoc.h"
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#include "uptodate.h"
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#include "buffer_head_io.h"
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#include "super.h"
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#include "xattr.h"
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struct ocfs2_xattr_def_value_root {
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struct ocfs2_xattr_value_root xv;
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struct ocfs2_extent_rec er;
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};
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struct ocfs2_xattr_bucket {
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struct buffer_head *bhs[OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET];
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struct ocfs2_xattr_header *xh;
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};
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#define OCFS2_XATTR_ROOT_SIZE (sizeof(struct ocfs2_xattr_def_value_root))
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#define OCFS2_XATTR_INLINE_SIZE 80
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static struct ocfs2_xattr_def_value_root def_xv = {
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.xv.xr_list.l_count = cpu_to_le16(1),
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};
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struct xattr_handler *ocfs2_xattr_handlers[] = {
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&ocfs2_xattr_user_handler,
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&ocfs2_xattr_trusted_handler,
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NULL
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};
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static struct xattr_handler *ocfs2_xattr_handler_map[] = {
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[OCFS2_XATTR_INDEX_USER] = &ocfs2_xattr_user_handler,
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[OCFS2_XATTR_INDEX_TRUSTED] = &ocfs2_xattr_trusted_handler,
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};
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struct ocfs2_xattr_info {
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int name_index;
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const char *name;
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const void *value;
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size_t value_len;
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};
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struct ocfs2_xattr_search {
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struct buffer_head *inode_bh;
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/*
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* xattr_bh point to the block buffer head which has extended attribute
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* when extended attribute in inode, xattr_bh is equal to inode_bh.
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*/
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struct buffer_head *xattr_bh;
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struct ocfs2_xattr_header *header;
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void *base;
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void *end;
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struct ocfs2_xattr_entry *here;
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int not_found;
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};
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static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
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struct ocfs2_xattr_tree_root *xt,
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char *buffer,
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size_t buffer_size);
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static inline struct xattr_handler *ocfs2_xattr_handler(int name_index)
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{
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struct xattr_handler *handler = NULL;
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if (name_index > 0 && name_index < OCFS2_XATTR_MAX)
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handler = ocfs2_xattr_handler_map[name_index];
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return handler;
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}
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static inline u32 ocfs2_xattr_name_hash(struct inode *inode,
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char *prefix,
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int prefix_len,
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char *name,
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int name_len)
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{
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/* Get hash value of uuid from super block */
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u32 hash = OCFS2_SB(inode->i_sb)->uuid_hash;
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int i;
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/* hash extended attribute prefix */
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for (i = 0; i < prefix_len; i++) {
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hash = (hash << OCFS2_HASH_SHIFT) ^
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(hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
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*prefix++;
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}
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/* hash extended attribute name */
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for (i = 0; i < name_len; i++) {
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hash = (hash << OCFS2_HASH_SHIFT) ^
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(hash >> (8*sizeof(hash) - OCFS2_HASH_SHIFT)) ^
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*name++;
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}
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return hash;
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}
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/*
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* ocfs2_xattr_hash_entry()
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*
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* Compute the hash of an extended attribute.
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*/
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static void ocfs2_xattr_hash_entry(struct inode *inode,
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struct ocfs2_xattr_header *header,
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struct ocfs2_xattr_entry *entry)
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{
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u32 hash = 0;
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struct xattr_handler *handler =
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ocfs2_xattr_handler(ocfs2_xattr_get_type(entry));
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char *prefix = handler->prefix;
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char *name = (char *)header + le16_to_cpu(entry->xe_name_offset);
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int prefix_len = strlen(handler->prefix);
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hash = ocfs2_xattr_name_hash(inode, prefix, prefix_len, name,
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entry->xe_name_len);
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entry->xe_name_hash = cpu_to_le32(hash);
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return;
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}
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static int ocfs2_xattr_extend_allocation(struct inode *inode,
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u32 clusters_to_add,
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struct buffer_head *xattr_bh,
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struct ocfs2_xattr_value_root *xv)
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{
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int status = 0;
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int restart_func = 0;
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int credits = 0;
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handle_t *handle = NULL;
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struct ocfs2_alloc_context *data_ac = NULL;
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struct ocfs2_alloc_context *meta_ac = NULL;
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enum ocfs2_alloc_restarted why;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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struct ocfs2_extent_list *root_el = &xv->xr_list;
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u32 prev_clusters, logical_start = le32_to_cpu(xv->xr_clusters);
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mlog(0, "(clusters_to_add for xattr= %u)\n", clusters_to_add);
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restart_all:
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status = ocfs2_lock_allocators(inode, xattr_bh, root_el,
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clusters_to_add, 0, &data_ac,
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&meta_ac, OCFS2_XATTR_VALUE_EXTENT, xv);
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if (status) {
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mlog_errno(status);
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goto leave;
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}
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credits = ocfs2_calc_extend_credits(osb->sb, root_el, clusters_to_add);
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handle = ocfs2_start_trans(osb, credits);
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if (IS_ERR(handle)) {
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status = PTR_ERR(handle);
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handle = NULL;
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mlog_errno(status);
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goto leave;
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}
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restarted_transaction:
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status = ocfs2_journal_access(handle, inode, xattr_bh,
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OCFS2_JOURNAL_ACCESS_WRITE);
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if (status < 0) {
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mlog_errno(status);
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goto leave;
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}
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prev_clusters = le32_to_cpu(xv->xr_clusters);
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status = ocfs2_add_clusters_in_btree(osb,
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inode,
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&logical_start,
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clusters_to_add,
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0,
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xattr_bh,
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root_el,
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handle,
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data_ac,
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meta_ac,
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&why,
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OCFS2_XATTR_VALUE_EXTENT,
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xv);
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if ((status < 0) && (status != -EAGAIN)) {
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if (status != -ENOSPC)
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mlog_errno(status);
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goto leave;
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}
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status = ocfs2_journal_dirty(handle, xattr_bh);
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if (status < 0) {
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mlog_errno(status);
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goto leave;
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}
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clusters_to_add -= le32_to_cpu(xv->xr_clusters) - prev_clusters;
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if (why != RESTART_NONE && clusters_to_add) {
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if (why == RESTART_META) {
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mlog(0, "restarting function.\n");
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restart_func = 1;
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} else {
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BUG_ON(why != RESTART_TRANS);
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mlog(0, "restarting transaction.\n");
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/* TODO: This can be more intelligent. */
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credits = ocfs2_calc_extend_credits(osb->sb,
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root_el,
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clusters_to_add);
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status = ocfs2_extend_trans(handle, credits);
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if (status < 0) {
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/* handle still has to be committed at
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* this point. */
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status = -ENOMEM;
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mlog_errno(status);
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goto leave;
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}
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goto restarted_transaction;
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}
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}
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leave:
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if (handle) {
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ocfs2_commit_trans(osb, handle);
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handle = NULL;
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}
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if (data_ac) {
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ocfs2_free_alloc_context(data_ac);
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data_ac = NULL;
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}
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if (meta_ac) {
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ocfs2_free_alloc_context(meta_ac);
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meta_ac = NULL;
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}
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if ((!status) && restart_func) {
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restart_func = 0;
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goto restart_all;
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}
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return status;
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}
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static int __ocfs2_remove_xattr_range(struct inode *inode,
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struct buffer_head *root_bh,
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struct ocfs2_xattr_value_root *xv,
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u32 cpos, u32 phys_cpos, u32 len,
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struct ocfs2_cached_dealloc_ctxt *dealloc)
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{
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int ret;
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u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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struct inode *tl_inode = osb->osb_tl_inode;
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handle_t *handle;
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struct ocfs2_alloc_context *meta_ac = NULL;
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ret = ocfs2_lock_allocators(inode, root_bh, &xv->xr_list,
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0, 1, NULL, &meta_ac,
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OCFS2_XATTR_VALUE_EXTENT, xv);
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if (ret) {
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mlog_errno(ret);
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return ret;
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}
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mutex_lock(&tl_inode->i_mutex);
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if (ocfs2_truncate_log_needs_flush(osb)) {
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ret = __ocfs2_flush_truncate_log(osb);
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if (ret < 0) {
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mlog_errno(ret);
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goto out;
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}
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}
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handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
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if (IS_ERR(handle)) {
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ret = PTR_ERR(handle);
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mlog_errno(ret);
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goto out;
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}
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ret = ocfs2_journal_access(handle, inode, root_bh,
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OCFS2_JOURNAL_ACCESS_WRITE);
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if (ret) {
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mlog_errno(ret);
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goto out_commit;
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}
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ret = ocfs2_remove_extent(inode, root_bh, cpos, len, handle, meta_ac,
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dealloc, OCFS2_XATTR_VALUE_EXTENT, xv);
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if (ret) {
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mlog_errno(ret);
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goto out_commit;
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}
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le32_add_cpu(&xv->xr_clusters, -len);
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ret = ocfs2_journal_dirty(handle, root_bh);
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if (ret) {
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mlog_errno(ret);
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goto out_commit;
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}
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ret = ocfs2_truncate_log_append(osb, handle, phys_blkno, len);
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if (ret)
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mlog_errno(ret);
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out_commit:
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ocfs2_commit_trans(osb, handle);
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out:
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mutex_unlock(&tl_inode->i_mutex);
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if (meta_ac)
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ocfs2_free_alloc_context(meta_ac);
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return ret;
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}
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static int ocfs2_xattr_shrink_size(struct inode *inode,
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u32 old_clusters,
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u32 new_clusters,
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struct buffer_head *root_bh,
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struct ocfs2_xattr_value_root *xv)
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{
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int ret = 0;
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u32 trunc_len, cpos, phys_cpos, alloc_size;
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u64 block;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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struct ocfs2_cached_dealloc_ctxt dealloc;
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ocfs2_init_dealloc_ctxt(&dealloc);
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if (old_clusters <= new_clusters)
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return 0;
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cpos = new_clusters;
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trunc_len = old_clusters - new_clusters;
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while (trunc_len) {
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ret = ocfs2_xattr_get_clusters(inode, cpos, &phys_cpos,
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&alloc_size, &xv->xr_list);
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if (ret) {
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mlog_errno(ret);
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goto out;
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}
|
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|
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if (alloc_size > trunc_len)
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alloc_size = trunc_len;
|
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|
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ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos,
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phys_cpos, alloc_size,
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&dealloc);
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if (ret) {
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mlog_errno(ret);
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goto out;
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}
|
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|
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block = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
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ocfs2_remove_xattr_clusters_from_cache(inode, block,
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alloc_size);
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cpos += alloc_size;
|
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trunc_len -= alloc_size;
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}
|
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|
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out:
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ocfs2_schedule_truncate_log_flush(osb, 1);
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ocfs2_run_deallocs(osb, &dealloc);
|
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|
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return ret;
|
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}
|
|
|
|
static int ocfs2_xattr_value_truncate(struct inode *inode,
|
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struct buffer_head *root_bh,
|
|
struct ocfs2_xattr_value_root *xv,
|
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int len)
|
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{
|
|
int ret;
|
|
u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
|
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u32 old_clusters = le32_to_cpu(xv->xr_clusters);
|
|
|
|
if (new_clusters == old_clusters)
|
|
return 0;
|
|
|
|
if (new_clusters > old_clusters)
|
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ret = ocfs2_xattr_extend_allocation(inode,
|
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new_clusters - old_clusters,
|
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root_bh, xv);
|
|
else
|
|
ret = ocfs2_xattr_shrink_size(inode,
|
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old_clusters, new_clusters,
|
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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 (!(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_search *xs,
|
|
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_xattr_value_root *xv;
|
|
struct ocfs2_extent_list *el;
|
|
|
|
xv = (struct ocfs2_xattr_value_root *)
|
|
(xs->base + le16_to_cpu(xs->here->xe_name_offset) +
|
|
OCFS2_XATTR_SIZE(xs->here->xe_name_len));
|
|
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;
|
|
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 {
|
|
ret = ocfs2_xattr_get_value_outside(inode, xs,
|
|
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;
|
|
size_t size;
|
|
int ret = -ENODATA;
|
|
|
|
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;
|
|
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);
|
|
if (ret)
|
|
goto cleanup;
|
|
size = le64_to_cpu(xs->here->xe_value_size);
|
|
if (buffer) {
|
|
ret = -ERANGE;
|
|
if (size > buffer_size)
|
|
goto cleanup;
|
|
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 {
|
|
ret = ocfs2_xattr_get_value_outside(inode, xs,
|
|
buffer, size);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto cleanup;
|
|
}
|
|
}
|
|
}
|
|
ret = size;
|
|
cleanup:
|
|
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 (!(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 attribue in external blcok*/
|
|
ret = ocfs2_extend_trans(handle,
|
|
OCFS2_XATTR_BLOCK_UPDATE_CREDITS);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_commit;
|
|
}
|
|
ret = ocfs2_journal_access(handle, inode, xs->xattr_bh,
|
|
OCFS2_JOURNAL_ACCESS_WRITE);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out_commit;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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_xattr_free_block(handle_t *handle,
|
|
struct ocfs2_super *osb,
|
|
struct ocfs2_xattr_block *xb)
|
|
{
|
|
struct inode *xb_alloc_inode;
|
|
struct buffer_head *xb_alloc_bh = NULL;
|
|
u64 blk = le64_to_cpu(xb->xb_blkno);
|
|
u16 bit = le16_to_cpu(xb->xb_suballoc_bit);
|
|
u64 bg_blkno = ocfs2_which_suballoc_group(blk, bit);
|
|
int ret = 0;
|
|
|
|
xb_alloc_inode = ocfs2_get_system_file_inode(osb,
|
|
EXTENT_ALLOC_SYSTEM_INODE,
|
|
le16_to_cpu(xb->xb_suballoc_slot));
|
|
if (!xb_alloc_inode) {
|
|
ret = -ENOMEM;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
mutex_lock(&xb_alloc_inode->i_mutex);
|
|
|
|
ret = ocfs2_inode_lock(xb_alloc_inode, &xb_alloc_bh, 1);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_mutex;
|
|
}
|
|
ret = ocfs2_extend_trans(handle, OCFS2_SUBALLOC_FREE);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
goto out_unlock;
|
|
}
|
|
ret = ocfs2_free_suballoc_bits(handle, xb_alloc_inode, xb_alloc_bh,
|
|
bit, bg_blkno, 1);
|
|
if (ret < 0)
|
|
mlog_errno(ret);
|
|
out_unlock:
|
|
ocfs2_inode_unlock(xb_alloc_inode, 1);
|
|
brelse(xb_alloc_bh);
|
|
out_mutex:
|
|
mutex_unlock(&xb_alloc_inode->i_mutex);
|
|
iput(xb_alloc_inode);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int ocfs2_remove_value_outside(struct inode*inode,
|
|
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;
|
|
struct ocfs2_xattr_header *header;
|
|
int ret = 0;
|
|
|
|
xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
|
|
header = &(xb->xb_attrs.xb_header);
|
|
|
|
ret = ocfs2_remove_value_outside(inode, blk_bh, header);
|
|
|
|
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_xattr_block *xb;
|
|
struct buffer_head *blk_bh = NULL;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct ocfs2_inode_info *oi = OCFS2_I(inode);
|
|
struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data;
|
|
handle_t *handle;
|
|
int ret;
|
|
|
|
if (!(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_read_block(OCFS2_SB(inode->i_sb),
|
|
le64_to_cpu(di->i_xattr_loc),
|
|
&blk_bh, OCFS2_BH_CACHED, inode);
|
|
if (ret < 0) {
|
|
mlog_errno(ret);
|
|
return ret;
|
|
}
|
|
/*Verify the signature of xattr block*/
|
|
if (memcmp((void *)blk_bh->b_data, OCFS2_XATTR_BLOCK_SIGNATURE,
|
|
strlen(OCFS2_XATTR_BLOCK_SIGNATURE))) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
ret = ocfs2_xattr_block_remove(inode, blk_bh);
|
|
if (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;
|
|
}
|
|
|
|
if (di->i_xattr_loc) {
|
|
xb = (struct ocfs2_xattr_block *)blk_bh->b_data;
|
|
ocfs2_xattr_free_block(handle, osb, xb);
|
|
di->i_xattr_loc = cpu_to_le64(0);
|
|
}
|
|
|
|
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:
|
|
brelse(blk_bh);
|
|
|
|
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;
|
|
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;
|
|
xs->header = &((struct ocfs2_xattr_block *)blk_bh->b_data)->
|
|
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);
|
|
if (ret && ret != -ENODATA) {
|
|
xs->xattr_bh = NULL;
|
|
goto cleanup;
|
|
}
|
|
xs->not_found = ret;
|
|
return 0;
|
|
|
|
cleanup:
|
|
brelse(blk_bh);
|
|
|
|
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;
|
|
}
|
|
|
|
/* Set extended attribute into external block */
|
|
ret = ocfs2_xattr_set_entry(inode, xi, xs, OCFS2_HAS_XATTR_FL);
|
|
|
|
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;
|
|
|
|
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,
|
|
};
|
|
|
|
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);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* 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_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\n", blkno);
|
|
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;
|
|
}
|