]> pilppa.com Git - linux-2.6-omap-h63xx.git/commitdiff
ocfs2/xattr: Reserve meta/data at the beginning of ocfs2_xattr_set.
authorTao Ma <tao.ma@oracle.com>
Wed, 12 Nov 2008 00:27:00 +0000 (08:27 +0800)
committerMark Fasheh <mfasheh@suse.com>
Mon, 5 Jan 2009 16:34:19 +0000 (08:34 -0800)
In ocfs2 xattr set, we reserve metadata and clusters in any place
they are needed. It is time-consuming and ineffective, so this
patch try to reserve metadata and clusters at the beginning of
ocfs2_xattr_set.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
fs/ocfs2/alloc.h
fs/ocfs2/xattr.c

index c301cf225f0b309f359cf2f783e554f62f7c48aa..3eb735eedae69081248e473ef7eff54bbf63379c 100644 (file)
@@ -176,6 +176,10 @@ static inline void ocfs2_init_dealloc_ctxt(struct ocfs2_cached_dealloc_ctxt *c)
 }
 int ocfs2_cache_cluster_dealloc(struct ocfs2_cached_dealloc_ctxt *ctxt,
                                u64 blkno, unsigned int bit);
+static inline int ocfs2_dealloc_has_cluster(struct ocfs2_cached_dealloc_ctxt *c)
+{
+       return c->c_global_allocator != NULL;
+}
 int ocfs2_run_deallocs(struct ocfs2_super *osb,
                       struct ocfs2_cached_dealloc_ctxt *ctxt);
 
index f1da381a44f6f4105a368bc962a2c8d25c9facef..4fd201a54c7257dc967eccc837bdc2b58ee75e4f 100644 (file)
@@ -71,6 +71,12 @@ struct ocfs2_xattr_bucket {
        int bu_blocks;
 };
 
+struct ocfs2_xattr_set_ctxt {
+       struct ocfs2_alloc_context *meta_ac;
+       struct ocfs2_alloc_context *data_ac;
+       struct ocfs2_cached_dealloc_ctxt dealloc;
+};
+
 #define OCFS2_XATTR_ROOT_SIZE  (sizeof(struct ocfs2_xattr_def_value_root))
 #define OCFS2_XATTR_INLINE_SIZE        80
 
@@ -133,11 +139,13 @@ static int ocfs2_xattr_tree_list_index_block(struct inode *inode,
                                        size_t buffer_size);
 
 static int ocfs2_xattr_create_index_block(struct inode *inode,
-                                         struct ocfs2_xattr_search *xs);
+                                         struct ocfs2_xattr_search *xs,
+                                         struct ocfs2_xattr_set_ctxt *ctxt);
 
 static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
                                             struct ocfs2_xattr_info *xi,
-                                            struct ocfs2_xattr_search *xs);
+                                            struct ocfs2_xattr_search *xs,
+                                            struct ocfs2_xattr_set_ctxt *ctxt);
 
 static int ocfs2_delete_xattr_index_block(struct inode *inode,
                                          struct buffer_head *xb_bh);
@@ -334,14 +342,13 @@ static void ocfs2_xattr_hash_entry(struct inode *inode,
 static int ocfs2_xattr_extend_allocation(struct inode *inode,
                                         u32 clusters_to_add,
                                         struct buffer_head *xattr_bh,
-                                        struct ocfs2_xattr_value_root *xv)
+                                        struct ocfs2_xattr_value_root *xv,
+                                        struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int status = 0;
        int restart_func = 0;
        int credits = 0;
        handle_t *handle = NULL;
-       struct ocfs2_alloc_context *data_ac = NULL;
-       struct ocfs2_alloc_context *meta_ac = NULL;
        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);
@@ -353,13 +360,6 @@ static int ocfs2_xattr_extend_allocation(struct inode *inode,
 
 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);
@@ -386,8 +386,8 @@ restarted_transaction:
                                             0,
                                             &et,
                                             handle,
-                                            data_ac,
-                                            meta_ac,
+                                            ctxt->data_ac,
+                                            ctxt->meta_ac,
                                             &why);
        if ((status < 0) && (status != -EAGAIN)) {
                if (status != -ENOSPC)
@@ -432,14 +432,6 @@ leave:
                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;
@@ -452,23 +444,16 @@ static int __ocfs2_remove_xattr_range(struct inode *inode,
                                      struct buffer_head *root_bh,
                                      struct ocfs2_xattr_value_root *xv,
                                      u32 cpos, u32 phys_cpos, u32 len,
-                                     struct ocfs2_cached_dealloc_ctxt *dealloc)
+                                     struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int ret;
        u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos);
        struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
        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;
-       }
-
        handle = ocfs2_start_trans(osb, OCFS2_REMOVE_EXTENT_CREDITS);
        if (IS_ERR(handle)) {
                ret = PTR_ERR(handle);
@@ -483,8 +468,8 @@ static int __ocfs2_remove_xattr_range(struct inode *inode,
                goto out_commit;
        }
 
-       ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, meta_ac,
-                                 dealloc);
+       ret = ocfs2_remove_extent(inode, &et, cpos, len, handle, ctxt->meta_ac,
+                                 &ctxt->dealloc);
        if (ret) {
                mlog_errno(ret);
                goto out_commit;
@@ -498,17 +483,13 @@ static int __ocfs2_remove_xattr_range(struct inode *inode,
                goto out_commit;
        }
 
-       ret = ocfs2_cache_cluster_dealloc(dealloc, phys_blkno, len);
+       ret = ocfs2_cache_cluster_dealloc(&ctxt->dealloc, phys_blkno, len);
        if (ret)
                mlog_errno(ret);
 
 out_commit:
        ocfs2_commit_trans(osb, handle);
 out:
-
-       if (meta_ac)
-               ocfs2_free_alloc_context(meta_ac);
-
        return ret;
 }
 
@@ -516,15 +497,12 @@ static int ocfs2_xattr_shrink_size(struct inode *inode,
                                   u32 old_clusters,
                                   u32 new_clusters,
                                   struct buffer_head *root_bh,
-                                  struct ocfs2_xattr_value_root *xv)
+                                  struct ocfs2_xattr_value_root *xv,
+                                  struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int ret = 0;
        u32 trunc_len, cpos, phys_cpos, alloc_size;
        u64 block;
-       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
-       struct ocfs2_cached_dealloc_ctxt dealloc;
-
-       ocfs2_init_dealloc_ctxt(&dealloc);
 
        if (old_clusters <= new_clusters)
                return 0;
@@ -544,7 +522,7 @@ static int ocfs2_xattr_shrink_size(struct inode *inode,
 
                ret = __ocfs2_remove_xattr_range(inode, root_bh, xv, cpos,
                                                 phys_cpos, alloc_size,
-                                                &dealloc);
+                                                ctxt);
                if (ret) {
                        mlog_errno(ret);
                        goto out;
@@ -558,16 +536,14 @@ static int ocfs2_xattr_shrink_size(struct inode *inode,
        }
 
 out:
-       ocfs2_schedule_truncate_log_flush(osb, 1);
-       ocfs2_run_deallocs(osb, &dealloc);
-
        return ret;
 }
 
 static int ocfs2_xattr_value_truncate(struct inode *inode,
                                      struct buffer_head *root_bh,
                                      struct ocfs2_xattr_value_root *xv,
-                                     int len)
+                                     int len,
+                                     struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int ret;
        u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb, len);
@@ -579,11 +555,11 @@ static int ocfs2_xattr_value_truncate(struct inode *inode,
        if (new_clusters > old_clusters)
                ret = ocfs2_xattr_extend_allocation(inode,
                                                    new_clusters - old_clusters,
-                                                   root_bh, xv);
+                                                   root_bh, xv, ctxt);
        else
                ret = ocfs2_xattr_shrink_size(inode,
                                              old_clusters, new_clusters,
-                                             root_bh, xv);
+                                             root_bh, xv, ctxt);
 
        return ret;
 }
@@ -1167,6 +1143,7 @@ out:
 static int ocfs2_xattr_set_value_outside(struct inode *inode,
                                         struct ocfs2_xattr_info *xi,
                                         struct ocfs2_xattr_search *xs,
+                                        struct ocfs2_xattr_set_ctxt *ctxt,
                                         size_t offs)
 {
        size_t name_len = strlen(xi->name);
@@ -1186,7 +1163,7 @@ static int ocfs2_xattr_set_value_outside(struct inode *inode,
        xv->xr_list.l_next_free_rec = 0;
 
        ret = ocfs2_xattr_value_truncate(inode, xs->xattr_bh, xv,
-                                        xi->value_len);
+                                        xi->value_len, ctxt);
        if (ret < 0) {
                mlog_errno(ret);
                return ret;
@@ -1317,6 +1294,7 @@ static void ocfs2_xattr_set_entry_local(struct inode *inode,
 static int ocfs2_xattr_set_entry(struct inode *inode,
                                 struct ocfs2_xattr_info *xi,
                                 struct ocfs2_xattr_search *xs,
+                                struct ocfs2_xattr_set_ctxt *ctxt,
                                 int flag)
 {
        struct ocfs2_xattr_entry *last;
@@ -1387,7 +1365,7 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
                if (ocfs2_xattr_is_local(xs->here) && size == size_l) {
                        /* Replace existing local xattr with tree root */
                        ret = ocfs2_xattr_set_value_outside(inode, xi, xs,
-                                                           offs);
+                                                           ctxt, offs);
                        if (ret < 0)
                                mlog_errno(ret);
                        goto out;
@@ -1406,7 +1384,8 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
                                ret = ocfs2_xattr_value_truncate(inode,
                                                                 xs->xattr_bh,
                                                                 xv,
-                                                                xi->value_len);
+                                                                xi->value_len,
+                                                                ctxt);
                                if (ret < 0) {
                                        mlog_errno(ret);
                                        goto out;
@@ -1436,7 +1415,8 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
                                 ret = ocfs2_xattr_value_truncate(inode,
                                                                 xs->xattr_bh,
                                                                 xv,
-                                                                0);
+                                                                0,
+                                                                ctxt);
                                if (ret < 0)
                                        mlog_errno(ret);
                        }
@@ -1531,7 +1511,7 @@ out_commit:
                 * This is the second step for value size > INLINE_SIZE.
                 */
                size_t offs = le16_to_cpu(xs->here->xe_name_offset);
-               ret = ocfs2_xattr_set_value_outside(inode, xi, xs, offs);
+               ret = ocfs2_xattr_set_value_outside(inode, xi, xs, ctxt, offs);
                if (ret < 0) {
                        int ret2;
 
@@ -1555,6 +1535,10 @@ static int ocfs2_remove_value_outside(struct inode*inode,
                                      struct ocfs2_xattr_header *header)
 {
        int ret = 0, i;
+       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+       struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
+
+       ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
 
        for (i = 0; i < le16_to_cpu(header->xh_count); i++) {
                struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
@@ -1567,14 +1551,17 @@ static int ocfs2_remove_value_outside(struct inode*inode,
                                le16_to_cpu(entry->xe_name_offset);
                        xv = (struct ocfs2_xattr_value_root *)
                                (val + OCFS2_XATTR_SIZE(entry->xe_name_len));
-                       ret = ocfs2_xattr_value_truncate(inode, bh, xv, 0);
+                       ret = ocfs2_xattr_value_truncate(inode, bh, xv,
+                                                        0, &ctxt);
                        if (ret < 0) {
                                mlog_errno(ret);
-                               return ret;
+                               break;
                        }
                }
        }
 
+       ocfs2_schedule_truncate_log_flush(osb, 1);
+       ocfs2_run_deallocs(osb, &ctxt.dealloc);
        return ret;
 }
 
@@ -1836,7 +1823,8 @@ static int ocfs2_xattr_ibody_find(struct inode *inode,
  */
 static int ocfs2_xattr_ibody_set(struct inode *inode,
                                 struct ocfs2_xattr_info *xi,
-                                struct ocfs2_xattr_search *xs)
+                                struct ocfs2_xattr_search *xs,
+                                struct ocfs2_xattr_set_ctxt *ctxt)
 {
        struct ocfs2_inode_info *oi = OCFS2_I(inode);
        struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
@@ -1853,7 +1841,7 @@ static int ocfs2_xattr_ibody_set(struct inode *inode,
                }
        }
 
-       ret = ocfs2_xattr_set_entry(inode, xi, xs,
+       ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
                                (OCFS2_INLINE_XATTR_FL | OCFS2_HAS_XATTR_FL));
 out:
        up_write(&oi->ip_alloc_sem);
@@ -1926,12 +1914,12 @@ cleanup:
  */
 static int ocfs2_xattr_block_set(struct inode *inode,
                                 struct ocfs2_xattr_info *xi,
-                                struct ocfs2_xattr_search *xs)
+                                struct ocfs2_xattr_search *xs,
+                                struct ocfs2_xattr_set_ctxt *ctxt)
 {
        struct buffer_head *new_bh = NULL;
        struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
        struct ocfs2_dinode *di =  (struct ocfs2_dinode *)xs->inode_bh->b_data;
-       struct ocfs2_alloc_context *meta_ac = NULL;
        handle_t *handle = NULL;
        struct ocfs2_xattr_block *xblk = NULL;
        u16 suballoc_bit_start;
@@ -1940,15 +1928,6 @@ static int ocfs2_xattr_block_set(struct inode *inode,
        int ret;
 
        if (!xs->xattr_bh) {
-               /*
-                * Alloc one external block for extended attribute
-                * outside of inode.
-                */
-               ret = ocfs2_reserve_new_metadata_blocks(osb, 1, &meta_ac);
-               if (ret < 0) {
-                       mlog_errno(ret);
-                       goto out;
-               }
                handle = ocfs2_start_trans(osb,
                                           OCFS2_XATTR_BLOCK_CREATE_CREDITS);
                if (IS_ERR(handle)) {
@@ -1963,7 +1942,7 @@ static int ocfs2_xattr_block_set(struct inode *inode,
                        goto out_commit;
                }
 
-               ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1,
+               ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1,
                                           &suballoc_bit_start, &num_got,
                                           &first_blkno);
                if (ret < 0) {
@@ -1996,7 +1975,6 @@ static int ocfs2_xattr_block_set(struct inode *inode,
                xs->end = (void *)xblk + inode->i_sb->s_blocksize;
                xs->here = xs->header->xh_entries;
 
-
                ret = ocfs2_journal_dirty(handle, new_bh);
                if (ret < 0) {
                        mlog_errno(ret);
@@ -2009,8 +1987,6 @@ static int ocfs2_xattr_block_set(struct inode *inode,
 out_commit:
                ocfs2_commit_trans(osb, handle);
 out:
-               if (meta_ac)
-                       ocfs2_free_alloc_context(meta_ac);
                if (ret < 0)
                        return ret;
        } else
@@ -2018,22 +1994,266 @@ out:
 
        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);
+               ret = ocfs2_xattr_set_entry(inode, xi, xs, ctxt,
+                                           OCFS2_HAS_XATTR_FL);
                if (!ret || ret != -ENOSPC)
                        goto end;
 
-               ret = ocfs2_xattr_create_index_block(inode, xs);
+               ret = ocfs2_xattr_create_index_block(inode, xs, ctxt);
                if (ret)
                        goto end;
        }
 
-       ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs);
+       ret = ocfs2_xattr_set_entry_index_block(inode, xi, xs, ctxt);
 
 end:
 
        return ret;
 }
 
+/* Check whether the new xattr can be inserted into the inode. */
+static int ocfs2_xattr_can_be_in_inode(struct inode *inode,
+                                      struct ocfs2_xattr_info *xi,
+                                      struct ocfs2_xattr_search *xs)
+{
+       u64 value_size;
+       struct ocfs2_xattr_entry *last;
+       int free, i;
+       size_t min_offs = xs->end - xs->base;
+
+       if (!xs->header)
+               return 0;
+
+       last = xs->header->xh_entries;
+
+       for (i = 0; i < le16_to_cpu(xs->header->xh_count); i++) {
+               size_t offs = le16_to_cpu(last->xe_name_offset);
+               if (offs < min_offs)
+                       min_offs = offs;
+               last += 1;
+       }
+
+       free = min_offs - ((void *)last - xs->base) - sizeof(__u32);
+       if (free < 0)
+               return 0;
+
+       BUG_ON(!xs->not_found);
+
+       if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
+               value_size = OCFS2_XATTR_ROOT_SIZE;
+       else
+               value_size = OCFS2_XATTR_SIZE(xi->value_len);
+
+       if (free >= sizeof(struct ocfs2_xattr_entry) +
+                  OCFS2_XATTR_SIZE(strlen(xi->name)) + value_size)
+               return 1;
+
+       return 0;
+}
+
+static int ocfs2_calc_xattr_set_need(struct inode *inode,
+                                    struct ocfs2_dinode *di,
+                                    struct ocfs2_xattr_info *xi,
+                                    struct ocfs2_xattr_search *xis,
+                                    struct ocfs2_xattr_search *xbs,
+                                    int *clusters_need,
+                                    int *meta_need)
+{
+       int ret = 0, old_in_xb = 0;
+       int clusters_add = 0, meta_add = 0;
+       struct buffer_head *bh = NULL;
+       struct ocfs2_xattr_block *xb = NULL;
+       struct ocfs2_xattr_entry *xe = NULL;
+       struct ocfs2_xattr_value_root *xv = NULL;
+       char *base = NULL;
+       int name_offset, name_len = 0;
+       u32 new_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
+                                                   xi->value_len);
+       u64 value_size;
+
+       /*
+        * delete a xattr doesn't need metadata and cluster allocation.
+        * so return.
+        */
+       if (!xi->value)
+               goto out;
+
+       if (xis->not_found && xbs->not_found) {
+               if (xi->value_len > OCFS2_XATTR_INLINE_SIZE)
+                       clusters_add += new_clusters;
+
+               goto meta_guess;
+       }
+
+       if (!xis->not_found) {
+               xe = xis->here;
+               name_offset = le16_to_cpu(xe->xe_name_offset);
+               name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
+               base = xis->base;
+       } else {
+               int i, block_off;
+               xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
+               xe = xbs->here;
+               name_offset = le16_to_cpu(xe->xe_name_offset);
+               name_len = OCFS2_XATTR_SIZE(xe->xe_name_len);
+               i = xbs->here - xbs->header->xh_entries;
+               old_in_xb = 1;
+
+               if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
+                       ret = ocfs2_xattr_bucket_get_name_value(inode,
+                                                       bucket_xh(xbs->bucket),
+                                                       i, &block_off,
+                                                       &name_offset);
+                       base = bucket_block(xbs->bucket, block_off);
+               } else
+                       base = xbs->base;
+       }
+
+       /* do cluster allocation guess first. */
+       value_size = le64_to_cpu(xe->xe_value_size);
+
+       if (old_in_xb) {
+               /*
+                * In xattr set, we always try to set the xe in inode first,
+                * so if it can be inserted into inode successfully, the old
+                * one will be removed from the xattr block, and this xattr
+                * will be inserted into inode as a new xattr in inode.
+                */
+               if (ocfs2_xattr_can_be_in_inode(inode, xi, xis)) {
+                       clusters_add += new_clusters;
+                       goto out;
+               }
+       }
+
+       if (xi->value_len > OCFS2_XATTR_INLINE_SIZE) {
+               /* the new values will be stored outside. */
+               u32 old_clusters = 0;
+
+               if (!ocfs2_xattr_is_local(xe)) {
+                       old_clusters =  ocfs2_clusters_for_bytes(inode->i_sb,
+                                                                value_size);
+                       xv = (struct ocfs2_xattr_value_root *)
+                            (base + name_offset + name_len);
+               } else
+                       xv = &def_xv.xv;
+
+               if (old_clusters >= new_clusters)
+                       goto out;
+               else {
+                       meta_add += ocfs2_extend_meta_needed(&xv->xr_list);
+                       clusters_add += new_clusters - old_clusters;
+                       goto out;
+               }
+       } else {
+               /*
+                * Now the new value will be stored inside. So if the new
+                * value is smaller than the size of value root or the old
+                * value, we don't need any allocation, otherwise we have
+                * to guess metadata allocation.
+                */
+               if ((ocfs2_xattr_is_local(xe) && value_size >= xi->value_len) ||
+                   (!ocfs2_xattr_is_local(xe) &&
+                    OCFS2_XATTR_ROOT_SIZE >= xi->value_len))
+                       goto out;
+       }
+
+meta_guess:
+       /* calculate metadata allocation. */
+       if (di->i_xattr_loc) {
+               if (!xbs->xattr_bh) {
+                       ret = ocfs2_read_block(inode,
+                                              le64_to_cpu(di->i_xattr_loc),
+                                              &bh);
+                       if (ret) {
+                               mlog_errno(ret);
+                               goto out;
+                       }
+
+                       xb = (struct ocfs2_xattr_block *)bh->b_data;
+               } else
+                       xb = (struct ocfs2_xattr_block *)xbs->xattr_bh->b_data;
+
+               if (le16_to_cpu(xb->xb_flags) & OCFS2_XATTR_INDEXED) {
+                       struct ocfs2_extent_list *el =
+                                &xb->xb_attrs.xb_root.xt_list;
+                       meta_add += ocfs2_extend_meta_needed(el);
+               }
+
+               /*
+                * This cluster will be used either for new bucket or for
+                * new xattr block.
+                * If the cluster size is the same as the bucket size, one
+                * more is needed since we may need to extend the bucket
+                * also.
+                */
+               clusters_add += 1;
+               if (OCFS2_XATTR_BUCKET_SIZE ==
+                       OCFS2_SB(inode->i_sb)->s_clustersize)
+                       clusters_add += 1;
+       } else
+               meta_add += 1;
+out:
+       if (clusters_need)
+               *clusters_need = clusters_add;
+       if (meta_need)
+               *meta_need = meta_add;
+       brelse(bh);
+       return ret;
+}
+
+static int ocfs2_init_xattr_set_ctxt(struct inode *inode,
+                                    struct ocfs2_dinode *di,
+                                    struct ocfs2_xattr_info *xi,
+                                    struct ocfs2_xattr_search *xis,
+                                    struct ocfs2_xattr_search *xbs,
+                                    struct ocfs2_xattr_set_ctxt *ctxt)
+{
+       int clusters_add, meta_add, ret;
+       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+
+       memset(ctxt, 0, sizeof(struct ocfs2_xattr_set_ctxt));
+
+       ocfs2_init_dealloc_ctxt(&ctxt->dealloc);
+
+       ret = ocfs2_calc_xattr_set_need(inode, di, xi, xis, xbs,
+                                       &clusters_add, &meta_add);
+       if (ret) {
+               mlog_errno(ret);
+               return ret;
+       }
+
+       mlog(0, "Set xattr %s, reserve meta blocks = %d, clusters = %d\n",
+            xi->name, meta_add, clusters_add);
+
+       if (meta_add) {
+               ret = ocfs2_reserve_new_metadata_blocks(osb, meta_add,
+                                                       &ctxt->meta_ac);
+               if (ret) {
+                       mlog_errno(ret);
+                       goto out;
+               }
+       }
+
+       if (clusters_add) {
+               ret = ocfs2_reserve_clusters(osb, clusters_add, &ctxt->data_ac);
+               if (ret)
+                       mlog_errno(ret);
+       }
+out:
+       if (ret) {
+               if (ctxt->meta_ac) {
+                       ocfs2_free_alloc_context(ctxt->meta_ac);
+                       ctxt->meta_ac = NULL;
+               }
+
+               /*
+                * We cannot have an error and a non null ctxt->data_ac.
+                */
+       }
+
+       return ret;
+}
+
 /*
  * ocfs2_xattr_set()
  *
@@ -2051,6 +2271,8 @@ int ocfs2_xattr_set(struct inode *inode,
        struct buffer_head *di_bh = NULL;
        struct ocfs2_dinode *di;
        int ret;
+       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+       struct ocfs2_xattr_set_ctxt ctxt = { NULL, NULL, };
 
        struct ocfs2_xattr_info xi = {
                .name_index = name_index,
@@ -2115,15 +2337,21 @@ int ocfs2_xattr_set(struct inode *inode,
                        goto cleanup;
        }
 
+       ret = ocfs2_init_xattr_set_ctxt(inode, di, &xi, &xis, &xbs, &ctxt);
+       if (ret) {
+               mlog_errno(ret);
+               goto cleanup;
+       }
+
        if (!value) {
                /* Remove existing extended attribute */
                if (!xis.not_found)
-                       ret = ocfs2_xattr_ibody_set(inode, &xi, &xis);
+                       ret = ocfs2_xattr_ibody_set(inode, &xi, &xis, &ctxt);
                else if (!xbs.not_found)
-                       ret = ocfs2_xattr_block_set(inode, &xi, &xbs);
+                       ret = ocfs2_xattr_block_set(inode, &xi, &xbs, &ctxt);
        } else {
                /* We always try to set extended attribute into inode first*/
-               ret = ocfs2_xattr_ibody_set(inode, &xi, &xis);
+               ret = ocfs2_xattr_ibody_set(inode, &xi, &xis, &ctxt);
                if (!ret && !xbs.not_found) {
                        /*
                         * If succeed and that extended attribute existing in
@@ -2131,7 +2359,7 @@ int ocfs2_xattr_set(struct inode *inode,
                         */
                        xi.value = NULL;
                        xi.value_len = 0;
-                       ret = ocfs2_xattr_block_set(inode, &xi, &xbs);
+                       ret = ocfs2_xattr_block_set(inode, &xi, &xbs, &ctxt);
                } else if (ret == -ENOSPC) {
                        if (di->i_xattr_loc && !xbs.xattr_bh) {
                                ret = ocfs2_xattr_block_find(inode, name_index,
@@ -2143,9 +2371,9 @@ int ocfs2_xattr_set(struct inode *inode,
                         * If no space in inode, we will set extended attribute
                         * into external block.
                         */
-                       ret = ocfs2_xattr_block_set(inode, &xi, &xbs);
+                       ret = ocfs2_xattr_block_set(inode, &xi, &xbs, &ctxt);
                        if (ret)
-                               goto cleanup;
+                               goto free;
                        if (!xis.not_found) {
                                /*
                                 * If succeed and that extended attribute
@@ -2153,10 +2381,19 @@ int ocfs2_xattr_set(struct inode *inode,
                                 */
                                xi.value = NULL;
                                xi.value_len = 0;
-                               ret = ocfs2_xattr_ibody_set(inode, &xi, &xis);
+                               ret = ocfs2_xattr_ibody_set(inode, &xi,
+                                                           &xis, &ctxt);
                        }
                }
        }
+free:
+       if (ctxt.data_ac)
+               ocfs2_free_alloc_context(ctxt.data_ac);
+       if (ctxt.meta_ac)
+               ocfs2_free_alloc_context(ctxt.meta_ac);
+       if (ocfs2_dealloc_has_cluster(&ctxt.dealloc))
+               ocfs2_schedule_truncate_log_flush(osb, 1);
+       ocfs2_run_deallocs(osb, &ctxt.dealloc);
 cleanup:
        up_write(&OCFS2_I(inode)->ip_xattr_sem);
        ocfs2_inode_unlock(inode, 1);
@@ -2734,7 +2971,8 @@ static void ocfs2_xattr_update_xattr_search(struct inode *inode,
 }
 
 static int ocfs2_xattr_create_index_block(struct inode *inode,
-                                         struct ocfs2_xattr_search *xs)
+                                         struct ocfs2_xattr_search *xs,
+                                         struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int ret, credits = OCFS2_SUBALLOC_ALLOC;
        u32 bit_off, len;
@@ -2742,7 +2980,6 @@ static int ocfs2_xattr_create_index_block(struct inode *inode,
        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 *xb_bh = xs->xattr_bh;
        struct ocfs2_xattr_block *xb =
                        (struct ocfs2_xattr_block *)xb_bh->b_data;
@@ -2755,12 +2992,6 @@ static int ocfs2_xattr_create_index_block(struct inode *inode,
        BUG_ON(xb_flags & OCFS2_XATTR_INDEXED);
        BUG_ON(!xs->bucket);
 
-       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
@@ -2787,7 +3018,8 @@ static int ocfs2_xattr_create_index_block(struct inode *inode,
                goto out_commit;
        }
 
-       ret = ocfs2_claim_clusters(osb, handle, data_ac, 1, &bit_off, &len);
+       ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac,
+                                    1, 1, &bit_off, &len);
        if (ret) {
                mlog_errno(ret);
                goto out_commit;
@@ -2850,10 +3082,6 @@ out_commit:
 out_sem:
        up_write(&oi->ip_alloc_sem);
 
-out:
-       if (data_ac)
-               ocfs2_free_alloc_context(data_ac);
-
        return ret;
 }
 
@@ -3614,7 +3842,8 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
                                       u32 *num_clusters,
                                       u32 prev_cpos,
                                       u64 prev_blkno,
-                                      int *extend)
+                                      int *extend,
+                                      struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int ret, credits;
        u16 bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
@@ -3622,8 +3851,6 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
        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;
 
@@ -3634,13 +3861,6 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
 
        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);
@@ -3658,7 +3878,7 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
                goto leave;
        }
 
-       ret = __ocfs2_claim_clusters(osb, handle, data_ac, 1,
+       ret = __ocfs2_claim_clusters(osb, handle, ctxt->data_ac, 1,
                                     clusters_to_add, &bit_off, &num_bits);
        if (ret < 0) {
                if (ret != -ENOSPC)
@@ -3719,7 +3939,7 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
        mlog(0, "Insert %u clusters at block %llu for xattr at %u\n",
             num_bits, (unsigned long long)block, v_start);
        ret = ocfs2_insert_extent(osb, handle, inode, &et, v_start, block,
-                                 num_bits, 0, meta_ac);
+                                 num_bits, 0, ctxt->meta_ac);
        if (ret < 0) {
                mlog_errno(ret);
                goto leave;
@@ -3734,10 +3954,6 @@ static int ocfs2_add_new_xattr_cluster(struct inode *inode,
 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;
 }
@@ -3821,7 +4037,8 @@ out:
  */
 static int ocfs2_add_new_xattr_bucket(struct inode *inode,
                                      struct buffer_head *xb_bh,
-                                     struct buffer_head *header_bh)
+                                     struct buffer_head *header_bh,
+                                     struct ocfs2_xattr_set_ctxt *ctxt)
 {
        struct ocfs2_xattr_header *first_xh = NULL;
        struct buffer_head *first_bh = NULL;
@@ -3872,7 +4089,8 @@ static int ocfs2_add_new_xattr_bucket(struct inode *inode,
                                                  &num_clusters,
                                                  e_cpos,
                                                  p_blkno,
-                                                 &extend);
+                                                 &extend,
+                                                 ctxt);
                if (ret) {
                        mlog_errno(ret);
                        goto out;
@@ -4147,7 +4365,8 @@ out:
 static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
                                             struct buffer_head *header_bh,
                                             int xe_off,
-                                            int len)
+                                            int len,
+                                            struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int ret, offset;
        u64 value_blk;
@@ -4182,7 +4401,7 @@ static int ocfs2_xattr_bucket_value_truncate(struct inode *inode,
 
        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);
+       ret = ocfs2_xattr_value_truncate(inode, value_bh, xv, len, ctxt);
        if (ret) {
                mlog_errno(ret);
                goto out;
@@ -4200,8 +4419,9 @@ out:
 }
 
 static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
-                                               struct ocfs2_xattr_search *xs,
-                                               int len)
+                                       struct ocfs2_xattr_search *xs,
+                                       int len,
+                                       struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int ret, offset;
        struct ocfs2_xattr_entry *xe = xs->here;
@@ -4211,7 +4431,7 @@ static int ocfs2_xattr_bucket_value_truncate_xs(struct inode *inode,
 
        offset = xe - xh->xh_entries;
        ret = ocfs2_xattr_bucket_value_truncate(inode, xs->bucket->bu_bhs[0],
-                                               offset, len);
+                                               offset, len, ctxt);
        if (ret)
                mlog_errno(ret);
 
@@ -4375,7 +4595,8 @@ out_commit:
  */
 static int ocfs2_xattr_set_in_bucket(struct inode *inode,
                                     struct ocfs2_xattr_info *xi,
-                                    struct ocfs2_xattr_search *xs)
+                                    struct ocfs2_xattr_search *xs,
+                                    struct ocfs2_xattr_set_ctxt *ctxt)
 {
        int ret, local = 1;
        size_t value_len;
@@ -4403,7 +4624,8 @@ static int ocfs2_xattr_set_in_bucket(struct inode *inode,
                        value_len = 0;
 
                ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
-                                                          value_len);
+                                                          value_len,
+                                                          ctxt);
                if (ret)
                        goto out;
 
@@ -4434,7 +4656,7 @@ static int ocfs2_xattr_set_in_bucket(struct inode *inode,
 
        /* allocate the space now for the outside block storage. */
        ret = ocfs2_xattr_bucket_value_truncate_xs(inode, xs,
-                                                  value_len);
+                                                  value_len, ctxt);
        if (ret) {
                mlog_errno(ret);
 
@@ -4485,7 +4707,8 @@ static int ocfs2_check_xattr_bucket_collision(struct inode *inode,
 
 static int ocfs2_xattr_set_entry_index_block(struct inode *inode,
                                             struct ocfs2_xattr_info *xi,
-                                            struct ocfs2_xattr_search *xs)
+                                            struct ocfs2_xattr_search *xs,
+                                            struct ocfs2_xattr_set_ctxt *ctxt)
 {
        struct ocfs2_xattr_header *xh;
        struct ocfs2_xattr_entry *xe;
@@ -4603,7 +4826,8 @@ try_again:
 
                ret = ocfs2_add_new_xattr_bucket(inode,
                                                 xs->xattr_bh,
-                                                xs->bucket->bu_bhs[0]);
+                                                xs->bucket->bu_bhs[0],
+                                                ctxt);
                if (ret) {
                        mlog_errno(ret);
                        goto out;
@@ -4622,7 +4846,7 @@ try_again:
        }
 
 xattr_set:
-       ret = ocfs2_xattr_set_in_bucket(inode, xi, xs);
+       ret = ocfs2_xattr_set_in_bucket(inode, xi, xs, ctxt);
 out:
        mlog_exit(ret);
        return ret;
@@ -4636,6 +4860,10 @@ static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
        struct ocfs2_xattr_header *xh = bucket_xh(bucket);
        u16 i;
        struct ocfs2_xattr_entry *xe;
+       struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
+       struct ocfs2_xattr_set_ctxt ctxt = {NULL, NULL,};
+
+       ocfs2_init_dealloc_ctxt(&ctxt.dealloc);
 
        for (i = 0; i < le16_to_cpu(xh->xh_count); i++) {
                xe = &xh->xh_entries[i];
@@ -4644,13 +4872,16 @@ static int ocfs2_delete_xattr_in_bucket(struct inode *inode,
 
                ret = ocfs2_xattr_bucket_value_truncate(inode,
                                                        bucket->bu_bhs[0],
-                                                       i, 0);
+                                                       i, 0, &ctxt);
                if (ret) {
                        mlog_errno(ret);
                        break;
                }
        }
 
+       ocfs2_schedule_truncate_log_flush(osb, 1);
+       ocfs2_run_deallocs(osb, &ctxt.dealloc);
+
        return ret;
 }