ocfs2: Set the xattr name+value pair in one place

We create two new functions on ocfs2_xa_loc, ocfs2_xa_prepare_entry()
and ocfs2_xa_store_inline_value().

ocfs2_xa_prepare_entry() makes sure that the xl_entry field of
ocfs2_xa_loc is ready to receive an xattr.  The entry will point to an
appropriately sized name+value region in storage.  If an existing entry
can be reused, it will be.  If no entry already exists, it will be
allocated.  If there isn't space to allocate it, -ENOSPC will be
returned.

ocfs2_xa_store_inline_value() stores the data that goes into the 'value'
part of the name+value pair.  For values that don't fit directly, this
stores the value tree root.

A number of operations are added to ocfs2_xa_loc_operations to support
these functions.  This reflects the disparate behaviors of xattr blocks
and buckets.

With these functions, the overlapping ocfs2_xattr_set_entry_local() and
ocfs2_xattr_set_entry_normal() can be replaced with a single call
scheme.

Signed-off-by: Joel Becker <joel.becker@oracle.com>

1 files changed, 411 insertions, 223 deletions

diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 064ec6d6c23c..4bf6ec849e19 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -147,11 +147,31 @@ struct ocfs2_xa_loc_operations {
          */
         void *(*xlo_offset_pointer)(struct ocfs2_xa_loc *loc, int offset);
 
+        /* Can we reuse the existing entry for the new value? */
+        int (*xlo_can_reuse)(struct ocfs2_xa_loc *loc,
+                             struct ocfs2_xattr_info *xi);
+
+        /* How much space is needed for the new value? */
+        int (*xlo_check_space)(struct ocfs2_xa_loc *loc,
+                               struct ocfs2_xattr_info *xi);
+
+        /*
+         * Return the offset of the first name+value pair.  This is
+         * the start of our downward-filling free space.
+         */
+        int (*xlo_get_free_start)(struct ocfs2_xa_loc *loc);
+
         /*
          * Remove the name+value at this location.  Do whatever is
          * appropriate with the remaining name+value pairs.
          */
         void (*xlo_wipe_namevalue)(struct ocfs2_xa_loc *loc);
+
+        /* Fill xl_entry with a new entry */
+        void (*xlo_add_entry)(struct ocfs2_xa_loc *loc, u32 name_hash);
+
+        /* Add name+value storage to an entry */
+        void (*xlo_add_namevalue)(struct ocfs2_xa_loc *loc, int size);
 };
 
 /*
@@ -1493,6 +1513,33 @@ static int ocfs2_xattr_set_value_outside(struct inode *inode,
         return ret;
 }
 
+static int ocfs2_xa_check_space_helper(int needed_space, int free_start,
+                                       int num_entries)
+{
+        int free_space;
+
+        if (!needed_space)
+                return 0;
+
+        free_space = free_start -
+                sizeof(struct ocfs2_xattr_header) -
+                (num_entries * sizeof(struct ocfs2_xattr_entry)) -
+                OCFS2_XATTR_HEADER_GAP;
+        if (free_space < 0)
+                return -EIO;
+        if (free_space < needed_space)
+                return -ENOSPC;
+
+        return 0;
+}
+
+/* Give a pointer into the storage for the given offset */
+static void *ocfs2_xa_offset_pointer(struct ocfs2_xa_loc *loc, int offset)
+{
+        BUG_ON(offset >= loc->xl_size);
+        return loc->xl_ops->xlo_offset_pointer(loc, offset);
+}
+
 /*
  * Wipe the name+value pair and allow the storage to reclaim it.  This
  * must be followed by either removal of the entry or a call to
@@ -1503,13 +1550,117 @@ static void ocfs2_xa_wipe_namevalue(struct ocfs2_xa_loc *loc)
         loc->xl_ops->xlo_wipe_namevalue(loc);
 }
 
+/*
+ * Find lowest offset to a name+value pair.  This is the start of our
+ * downward-growing free space.
+ */
+static int ocfs2_xa_get_free_start(struct ocfs2_xa_loc *loc)
+{
+        return loc->xl_ops->xlo_get_free_start(loc);
+}
+
+/* Can we reuse loc->xl_entry for xi? */
+static int ocfs2_xa_can_reuse_entry(struct ocfs2_xa_loc *loc,
+                                    struct ocfs2_xattr_info *xi)
+{
+        return loc->xl_ops->xlo_can_reuse(loc, xi);
+}
+
+/* How much free space is needed to set the new value */
+static int ocfs2_xa_check_space(struct ocfs2_xa_loc *loc,
+                                struct ocfs2_xattr_info *xi)
+{
+        return loc->xl_ops->xlo_check_space(loc, xi);
+}
+
+static void ocfs2_xa_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
+{
+        loc->xl_ops->xlo_add_entry(loc, name_hash);
+        loc->xl_entry->xe_name_hash = cpu_to_le32(name_hash);
+        /*
+         * We can't leave the new entry's xe_name_offset at zero or
+         * add_namevalue() will go nuts.  We set it to the size of our
+         * storage so that it can never be less than any other entry.
+         */
+        loc->xl_entry->xe_name_offset = cpu_to_le16(loc->xl_size);
+}
+
+static void ocfs2_xa_add_namevalue(struct ocfs2_xa_loc *loc,
+                                   struct ocfs2_xattr_info *xi)
+{
+        int size = namevalue_size_xi(xi);
+        int nameval_offset;
+        char *nameval_buf;
+
+        loc->xl_ops->xlo_add_namevalue(loc, size);
+        loc->xl_entry->xe_value_size = cpu_to_le64(xi->xi_value_len);
+        loc->xl_entry->xe_name_len = xi->xi_name_len;
+        ocfs2_xattr_set_type(loc->xl_entry, xi->xi_name_index);
+        ocfs2_xattr_set_local(loc->xl_entry,
+                              xi->xi_value_len <= OCFS2_XATTR_INLINE_SIZE);
+
+        nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
+        nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
+        memset(nameval_buf, 0, size);
+        memcpy(nameval_buf, xi->xi_name, xi->xi_name_len);
+}
+
 static void *ocfs2_xa_block_offset_pointer(struct ocfs2_xa_loc *loc,
                                            int offset)
 {
-        BUG_ON(offset >= loc->xl_size);
         return (char *)loc->xl_header + offset;
 }
 
+static int ocfs2_xa_block_can_reuse(struct ocfs2_xa_loc *loc,
+                                    struct ocfs2_xattr_info *xi)
+{
+        /*
+         * Block storage is strict.  If the sizes aren't exact, we will
+         * remove the old one and reinsert the new.
+         */
+        return namevalue_size_xe(loc->xl_entry) ==
+                namevalue_size_xi(xi);
+}
+
+static int ocfs2_xa_block_get_free_start(struct ocfs2_xa_loc *loc)
+{
+        struct ocfs2_xattr_header *xh = loc->xl_header;
+        int i, count = le16_to_cpu(xh->xh_count);
+        int offset, free_start = loc->xl_size;
+
+        for (i = 0; i < count; i++) {
+                offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
+                if (offset < free_start)
+                        free_start = offset;
+        }
+
+        return free_start;
+}
+
+static int ocfs2_xa_block_check_space(struct ocfs2_xa_loc *loc,
+                                      struct ocfs2_xattr_info *xi)
+{
+        int count = le16_to_cpu(loc->xl_header->xh_count);
+        int free_start = ocfs2_xa_get_free_start(loc);
+        int needed_space = ocfs2_xi_entry_usage(xi);
+
+        /*
+         * Block storage will reclaim the original entry before inserting
+         * the new value, so we only need the difference.  If the new
+         * entry is smaller than the old one, we don't need anything.
+         */
+        if (loc->xl_entry) {
+                /* Don't need space if we're reusing! */
+                if (ocfs2_xa_can_reuse_entry(loc, xi))
+                        needed_space = 0;
+                else
+                        needed_space -= ocfs2_xe_entry_usage(loc->xl_entry);
+        }
+        if (needed_space < 0)
+                needed_space = 0;
+        return ocfs2_xa_check_space_helper(needed_space, free_start, count);
+}
+
 /*
  * Block storage for xattrs keeps the name+value pairs compacted.  When
  * we remove one, we have to shift any that preceded it towards the end.
@@ -1524,13 +1675,7 @@ static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc)
 
         namevalue_offset = le16_to_cpu(entry->xe_name_offset);
         namevalue_size = namevalue_size_xe(entry);
-
-        for (i = 0, first_namevalue_offset = loc->xl_size;
-             i < count; i++) {
-                offset = le16_to_cpu(xh->xh_entries[i].xe_name_offset);
-                if (offset < first_namevalue_offset)
-                        first_namevalue_offset = offset;
-        }
+        first_namevalue_offset = ocfs2_xa_get_free_start(loc);
 
         /* Shift the name+value pairs */
         memmove((char *)xh + first_namevalue_offset + namevalue_size,
@@ -1552,13 +1697,33 @@ static void ocfs2_xa_block_wipe_namevalue(struct ocfs2_xa_loc *loc)
          */
 }
 
+static void ocfs2_xa_block_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
+{
+        int count = le16_to_cpu(loc->xl_header->xh_count);
+        loc->xl_entry = &(loc->xl_header->xh_entries[count]);
+        le16_add_cpu(&loc->xl_header->xh_count, 1);
+        memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
+}
+
+static void ocfs2_xa_block_add_namevalue(struct ocfs2_xa_loc *loc, int size)
+{
+        int free_start = ocfs2_xa_get_free_start(loc);
+
+        loc->xl_entry->xe_name_offset = cpu_to_le16(free_start - size);
+}
+
 /*
  * Operations for xattrs stored in blocks.  This includes inline inode
  * storage and unindexed ocfs2_xattr_blocks.
  */
 static const struct ocfs2_xa_loc_operations ocfs2_xa_block_loc_ops = {
         .xlo_offset_pointer     = ocfs2_xa_block_offset_pointer,
+        .xlo_check_space        = ocfs2_xa_block_check_space,
+        .xlo_can_reuse          = ocfs2_xa_block_can_reuse,
+        .xlo_get_free_start     = ocfs2_xa_block_get_free_start,
         .xlo_wipe_namevalue     = ocfs2_xa_block_wipe_namevalue,
+        .xlo_add_entry          = ocfs2_xa_block_add_entry,
+        .xlo_add_namevalue      = ocfs2_xa_block_add_namevalue,
 };
 
 static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc,
@@ -1567,8 +1732,6 @@ static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc,
         struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
         int block, block_offset;
 
-        BUG_ON(offset >= OCFS2_XATTR_BUCKET_SIZE);
-
         /* The header is at the front of the bucket */
         block = offset >> bucket->bu_inode->i_sb->s_blocksize_bits;
         block_offset = offset % bucket->bu_inode->i_sb->s_blocksize;
@@ -1576,16 +1739,145 @@ static void *ocfs2_xa_bucket_offset_pointer(struct ocfs2_xa_loc *loc,
         return bucket_block(bucket, block) + block_offset;
 }
 
+static int ocfs2_xa_bucket_can_reuse(struct ocfs2_xa_loc *loc,
+                                     struct ocfs2_xattr_info *xi)
+{
+        return namevalue_size_xe(loc->xl_entry) >=
+                namevalue_size_xi(xi);
+}
+
+static int ocfs2_xa_bucket_get_free_start(struct ocfs2_xa_loc *loc)
+{
+        struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
+        return le16_to_cpu(bucket_xh(bucket)->xh_free_start);
+}
+
+static int ocfs2_bucket_align_free_start(struct super_block *sb,
+                                         int free_start, int size)
+{
+        /*
+         * We need to make sure that the name+value pair fits within
+         * one block.
+         */
+        if (((free_start - size) >> sb->s_blocksize_bits) !=
+            ((free_start - 1) >> sb->s_blocksize_bits))
+                free_start -= free_start % sb->s_blocksize;
+
+        return free_start;
+}
+
+static int ocfs2_xa_bucket_check_space(struct ocfs2_xa_loc *loc,
+                                       struct ocfs2_xattr_info *xi)
+{
+        int rc;
+        int count = le16_to_cpu(loc->xl_header->xh_count);
+        int free_start = ocfs2_xa_get_free_start(loc);
+        int needed_space = ocfs2_xi_entry_usage(xi);
+        int size = namevalue_size_xi(xi);
+        struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
+        struct super_block *sb = bucket->bu_inode->i_sb;
+
+        /*
+         * Bucket storage does not reclaim name+value pairs it cannot
+         * reuse.  They live as holes until the bucket fills, and then
+         * the bucket is defragmented.  However, the bucket can reclaim
+         * the ocfs2_xattr_entry.
+         */
+        if (loc->xl_entry) {
+                /* Don't need space if we're reusing! */
+                if (ocfs2_xa_can_reuse_entry(loc, xi))
+                        needed_space = 0;
+                else
+                        needed_space -= sizeof(struct ocfs2_xattr_entry);
+        }
+        BUG_ON(needed_space < 0);
+
+        if (free_start < size) {
+                if (needed_space)
+                        return -ENOSPC;
+        } else {
+                /*
+                 * First we check if it would fit in the first place.
+                 * Below, we align the free start to a block.  This may
+                 * slide us below the minimum gap.  By checking unaligned
+                 * first, we avoid that error.
+                 */
+                rc = ocfs2_xa_check_space_helper(needed_space, free_start,
+                                                 count);
+                if (rc)
+                        return rc;
+                free_start = ocfs2_bucket_align_free_start(sb, free_start,
+                                                           size);
+        }
+        return ocfs2_xa_check_space_helper(needed_space, free_start, count);
+}
+
 static void ocfs2_xa_bucket_wipe_namevalue(struct ocfs2_xa_loc *loc)
 {
         le16_add_cpu(&loc->xl_header->xh_name_value_len,
                      -namevalue_size_xe(loc->xl_entry));
 }
 
+static void ocfs2_xa_bucket_add_entry(struct ocfs2_xa_loc *loc, u32 name_hash)
+{
+        struct ocfs2_xattr_header *xh = loc->xl_header;
+        int count = le16_to_cpu(xh->xh_count);
+        int low = 0, high = count - 1, tmp;
+        struct ocfs2_xattr_entry *tmp_xe;
+
+        /*
+         * We keep buckets sorted by name_hash, so we need to find
+         * our insert place.
+         */
+        while (low <= high && count) {
+                tmp = (low + high) / 2;
+                tmp_xe = &xh->xh_entries[tmp];
+
+                if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
+                        low = tmp + 1;
+                else if (name_hash < le32_to_cpu(tmp_xe->xe_name_hash))
+                        high = tmp - 1;
+                else {
+                        low = tmp;
+                        break;
+                }
+        }
+
+        if (low != count)
+                memmove(&xh->xh_entries[low + 1],
+                        &xh->xh_entries[low],
+                        ((count - low) * sizeof(struct ocfs2_xattr_entry)));
+
+        le16_add_cpu(&xh->xh_count, 1);
+        loc->xl_entry = &xh->xh_entries[low];
+        memset(loc->xl_entry, 0, sizeof(struct ocfs2_xattr_entry));
+}
+
+static void ocfs2_xa_bucket_add_namevalue(struct ocfs2_xa_loc *loc, int size)
+{
+        int free_start = ocfs2_xa_get_free_start(loc);
+        struct ocfs2_xattr_header *xh = loc->xl_header;
+        struct ocfs2_xattr_bucket *bucket = loc->xl_storage;
+        struct super_block *sb = bucket->bu_inode->i_sb;
+        int nameval_offset;
+
+        free_start = ocfs2_bucket_align_free_start(sb, free_start, size);
+        nameval_offset = free_start - size;
+        loc->xl_entry->xe_name_offset = cpu_to_le16(nameval_offset);
+        xh->xh_free_start = cpu_to_le16(nameval_offset);
+        le16_add_cpu(&xh->xh_name_value_len, size);
+
+}
+
 /* Operations for xattrs stored in buckets. */
 static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = {
         .xlo_offset_pointer     = ocfs2_xa_bucket_offset_pointer,
+        .xlo_check_space        = ocfs2_xa_bucket_check_space,
+        .xlo_can_reuse          = ocfs2_xa_bucket_can_reuse,
+        .xlo_get_free_start     = ocfs2_xa_bucket_get_free_start,
         .xlo_wipe_namevalue     = ocfs2_xa_bucket_wipe_namevalue,
+        .xlo_add_entry          = ocfs2_xa_bucket_add_entry,
+        .xlo_add_namevalue      = ocfs2_xa_bucket_add_namevalue,
 };
 
 static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
@@ -1615,6 +1907,77 @@ static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
         }
 }
 
+/*
+ * Prepares loc->xl_entry to receive the new xattr.  This includes
+ * properly setting up the name+value pair region.  If loc->xl_entry
+ * already exists, it will take care of modifying it appropriately.
+ * This also includes deleting entries, but don't call this to remove
+ * a non-existant entry.  That's just a bug.
+ *
+ * Note that this modifies the data.  You did journal_access already,
+ * right?
+ */
+static int ocfs2_xa_prepare_entry(struct ocfs2_xa_loc *loc,
+                                  struct ocfs2_xattr_info *xi,
+                                  u32 name_hash)
+{
+        int rc = 0;
+        int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
+        char *nameval_buf;
+
+        if (!xi->xi_value) {
+                ocfs2_xa_remove_entry(loc);
+                goto out;
+        }
+
+        rc = ocfs2_xa_check_space(loc, xi);
+        if (rc)
+                goto out;
+
+        if (loc->xl_entry) {
+                if (ocfs2_xa_can_reuse_entry(loc, xi)) {
+                        nameval_buf = ocfs2_xa_offset_pointer(loc,
+                                le16_to_cpu(loc->xl_entry->xe_name_offset));
+                        memset(nameval_buf + name_size, 0,
+                               namevalue_size_xe(loc->xl_entry) - name_size);
+                        loc->xl_entry->xe_value_size =
+                                cpu_to_le64(xi->xi_value_len);
+                        goto out;
+                }
+
+                ocfs2_xa_wipe_namevalue(loc);
+        } else
+                ocfs2_xa_add_entry(loc, name_hash);
+
+        /*
+         * If we get here, we have a blank entry.  Fill it.  We grow our
+         * name+value pair back from the end.
+         */
+        ocfs2_xa_add_namevalue(loc, xi);
+
+out:
+        return rc;
+}
+
+/*
+ * Store the value portion of the name+value pair.  This is either an
+ * inline value or the tree root of an external value.
+ */
+static void ocfs2_xa_store_inline_value(struct ocfs2_xa_loc *loc,
+                                        struct ocfs2_xattr_info *xi)
+{
+        int nameval_offset = le16_to_cpu(loc->xl_entry->xe_name_offset);
+        int name_size = OCFS2_XATTR_SIZE(xi->xi_name_len);
+        int size = namevalue_size_xi(xi);
+        char *nameval_buf;
+
+        if (!xi->xi_value)
+                return;
+
+        nameval_buf = ocfs2_xa_offset_pointer(loc, nameval_offset);
+        memcpy(nameval_buf + name_size, xi->xi_value, size - name_size);
+}
+
 static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc,
                                      struct inode *inode,
                                      struct buffer_head *bh,
@@ -1665,81 +2028,6 @@ static void ocfs2_init_xattr_bucket_xa_loc(struct ocfs2_xa_loc *loc,
         loc->xl_size = OCFS2_XATTR_BUCKET_SIZE;
 }
 
-/*
- * 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)
-{
-        struct ocfs2_xa_loc loc;
-
-        if (xs->xattr_bh == xs->inode_bh)
-                ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh,
-                                         xs->not_found ? NULL : xs->here);
-        else
-                ocfs2_init_xattr_block_xa_loc(&loc, xs->xattr_bh,
-                                              xs->not_found ? NULL : xs->here);
-        if (xi->xi_value && xs->not_found) {
-                /* Insert the new xattr entry. */
-                le16_add_cpu(&xs->header->xh_count, 1);
-                ocfs2_xattr_set_type(last, xi->xi_name_index);
-                ocfs2_xattr_set_local(last, 1);
-                last->xe_name_len = xi->xi_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;
-
-                size = namevalue_size_xe(xs->here);
-                if (xi->xi_value && (size == namevalue_size_xi(xi))) {
-                        /* 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->xi_value_len);
-                        /* Clear value bytes. */
-                        memset(val + OCFS2_XATTR_SIZE(xi->xi_name_len),
-                               0,
-                               OCFS2_XATTR_SIZE(xi->xi_value_len));
-                        memcpy(val + OCFS2_XATTR_SIZE(xi->xi_name_len),
-                               xi->xi_value,
-                               xi->xi_value_len);
-                        return;
-                }
-
-                if (!xi->xi_value)
-                        ocfs2_xa_remove_entry(&loc);
-                else
-                        ocfs2_xa_wipe_namevalue(&loc);
-
-                min_offs += size;
-        }
-        if (xi->xi_value) {
-                /* Insert the new name+value. */
-                size_t size = namevalue_size_xi(xi);
-                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->xi_name, xi->xi_name_len);
-                memcpy(val + OCFS2_XATTR_SIZE(xi->xi_name_len),
-                       xi->xi_value,
-                       xi->xi_value_len);
-                xs->here->xe_value_size = cpu_to_le64(xi->xi_value_len);
-                ocfs2_xattr_set_local(xs->here, 1);
-                ocfs2_xattr_hash_entry(inode, xs->header, xs->here);
-        }
-
-        return;
-}
 
 /*
  * ocfs2_xattr_set_entry()
@@ -1747,7 +2035,7 @@ static void ocfs2_xattr_set_entry_local(struct inode *inode,
  * 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(),
+ * We first insert tree root(ocfs2_xattr_value_root) like a normal value,
  * then set value in B tree with set_value_outside().
  */
 static int ocfs2_xattr_set_entry(struct inode *inode,
@@ -1763,6 +2051,9 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
         size_t size_l = 0;
         handle_t *handle = ctxt->handle;
         int free, i, ret;
+        u32 name_hash = ocfs2_xattr_name_hash(inode, xi->xi_name,
+                                              xi->xi_name_len);
+        struct ocfs2_xa_loc loc;
         struct ocfs2_xattr_info xi_l = {
                 .xi_name_index = xi->xi_name_index,
                 .xi_name = xi->xi_name,
@@ -1894,11 +2185,28 @@ static int ocfs2_xattr_set_entry(struct inode *inode,
                 }
         }
 
+        if (xs->xattr_bh == xs->inode_bh)
+                ocfs2_init_dinode_xa_loc(&loc, inode, xs->inode_bh,
+                                         xs->not_found ? NULL : xs->here);
+        else
+                ocfs2_init_xattr_block_xa_loc(&loc, xs->xattr_bh,
+                                              xs->not_found ? NULL : xs->here);
+
         /*
-         * Set value in local, include set tree root in local.
-         * This is the first step for value size >INLINE_SIZE.
+         * Prepare our entry and insert the inline value.  This will
+         * be a value tree root for values that are larger than
+         * OCFS2_XATTR_INLINE_SIZE.
          */
-        ocfs2_xattr_set_entry_local(inode, &xi_l, xs, last, min_offs);
+        ret = ocfs2_xa_prepare_entry(&loc, xi, name_hash);
+        if (ret) {
+                if (ret != -ENOSPC)
+                        mlog_errno(ret);
+                goto out;
+        }
+        /* XXX For now, until we make ocfs2_xa_prepare_entry() primary */
+        BUG_ON(ret == -ENOSPC);
+        ocfs2_xa_store_inline_value(&loc, xi);
+        xs->here = loc.xl_entry;
 
         if (!(flag & OCFS2_INLINE_XATTR_FL)) {
                 ret = ocfs2_journal_dirty(handle, xs->xattr_bh);
@@ -4939,139 +5247,6 @@ static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
 }
 
 /*
- * Handle the normal xattr set, including replace, delete and new.
- *
- * Note: "local" indicates the real data's locality. So we can't
- * just its bucket locality by its length.
- */
-static void ocfs2_xattr_set_entry_normal(struct inode *inode,
-                                         struct ocfs2_xattr_info *xi,
-                                         struct ocfs2_xattr_search *xs,
-                                         u32 name_hash,
-                                         int local)
-{
-        struct ocfs2_xattr_entry *last, *xe;
-        struct ocfs2_xattr_header *xh = xs->header;
-        u16 count = le16_to_cpu(xh->xh_count), start;
-        size_t blocksize = inode->i_sb->s_blocksize;
-        char *val;
-        size_t offs, size, new_size;
-        struct ocfs2_xa_loc loc;
-
-        ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
-                                       xs->not_found ? NULL : xs->here);
-        last = &xh->xh_entries[count];
-        if (!xs->not_found) {
-                xe = xs->here;
-                offs = le16_to_cpu(xe->xe_name_offset);
-                size = namevalue_size_xe(xe);
-
-                /*
-                 * If the new value will be stored outside, xi->xi_value has
-                 * been initalized as an empty ocfs2_xattr_value_root, and
-                 * the same goes with xi->xi_value_len, so we can set
-                 * new_size safely here.
-                 * See ocfs2_xattr_set_in_bucket.
-                 */
-                new_size = namevalue_size_xi(xi);
-
-                if (xi->xi_value) {
-                        ocfs2_xa_wipe_namevalue(&loc);
-                        if (new_size > size)
-                                goto set_new_name_value;
-
-                        /* Now replace the old value with new one. */
-                        if (local)
-                                xe->xe_value_size =
-                                        cpu_to_le64(xi->xi_value_len);
-                        else
-                                xe->xe_value_size = 0;
-
-                        val = ocfs2_xattr_bucket_get_val(inode,
-                                                         xs->bucket, offs);
-                        memset(val + OCFS2_XATTR_SIZE(xi->xi_name_len), 0,
-                               size - OCFS2_XATTR_SIZE(xi->xi_name_len));
-                        if (OCFS2_XATTR_SIZE(xi->xi_value_len) > 0)
-                                memcpy(val + OCFS2_XATTR_SIZE(xi->xi_name_len),
-                                       xi->xi_value, xi->xi_value_len);
-
-                        le16_add_cpu(&xh->xh_name_value_len, new_size);
-                        ocfs2_xattr_set_local(xe, local);
-                        return;
-                } else {
-                        ocfs2_xa_remove_entry(&loc);
-                        if (!xh->xh_count)
-                                xh->xh_free_start =
-                                        cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
-
-                        return;
-                }
-        } else {
-                /* find a new entry for insert. */
-                int low = 0, high = count - 1, tmp;
-                struct ocfs2_xattr_entry *tmp_xe;
-
-                while (low <= high && count) {
-                        tmp = (low + high) / 2;
-                        tmp_xe = &xh->xh_entries[tmp];
-
-                        if (name_hash > le32_to_cpu(tmp_xe->xe_name_hash))
-                                low = tmp + 1;
-                        else if (name_hash <
-                                 le32_to_cpu(tmp_xe->xe_name_hash))
-                                high = tmp - 1;
-                        else {
-                                low = tmp;
-                                break;
-                        }
-                }
-
-                xe = &xh->xh_entries[low];
-                if (low != count)
-                        memmove(xe + 1, xe, (void *)last - (void *)xe);
-
-                le16_add_cpu(&xh->xh_count, 1);
-                memset(xe, 0, sizeof(struct ocfs2_xattr_entry));
-                xe->xe_name_hash = cpu_to_le32(name_hash);
-                xe->xe_name_len = xi->xi_name_len;
-                ocfs2_xattr_set_type(xe, xi->xi_name_index);
-        }
-
-set_new_name_value:
-        /* Insert the new name+value. */
-        size = namevalue_size_xi(xi);
-
-        /*
-         * We must make sure that the name/value pair
-         * exists in the same block.
-         */
-        offs = le16_to_cpu(xh->xh_free_start);
-        start = offs - size;
-
-        if (start >> inode->i_sb->s_blocksize_bits !=
-            (offs - 1) >> inode->i_sb->s_blocksize_bits) {
-                offs = offs - offs % blocksize;
-                xh->xh_free_start = cpu_to_le16(offs);
-        }
-
-        val = ocfs2_xattr_bucket_get_val(inode, xs->bucket, offs - size);
-        xe->xe_name_offset = cpu_to_le16(offs - size);
-
-        memset(val, 0, size);
-        memcpy(val, xi->xi_name, xi->xi_name_len);
-        memcpy(val + OCFS2_XATTR_SIZE(xi->xi_name_len), xi->xi_value,
-               xi->xi_value_len);
-
-        xe->xe_value_size = cpu_to_le64(xi->xi_value_len);
-        ocfs2_xattr_set_local(xe, local);
-        xs->here = xe;
-        le16_add_cpu(&xh->xh_free_start, -size);
-        le16_add_cpu(&xh->xh_name_value_len, size);
-
-        return;
-}
-
-/*
  * Set the xattr entry in the specified bucket.
  * The bucket is indicated by xs->bucket and it should have the enough
  * space for the xattr insertion.
@@ -5085,6 +5260,7 @@ static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
 {
         int ret;
         u64 blkno;
+        struct ocfs2_xa_loc loc;
 
         mlog(0, "Set xattr entry len = %lu index = %d in bucket %llu\n",
              (unsigned long)xi->xi_value_len, xi->xi_name_index,
@@ -5107,7 +5283,19 @@ static int ocfs2_xattr_set_entry_in_bucket(struct inode *inode,
                 goto out;
         }
 
-        ocfs2_xattr_set_entry_normal(inode, xi, xs, name_hash, local);
+        ocfs2_init_xattr_bucket_xa_loc(&loc, xs->bucket,
+                                       xs->not_found ? NULL : xs->here);
+        ret = ocfs2_xa_prepare_entry(&loc, xi, name_hash);
+        if (ret) {
+                if (ret != -ENOSPC)
+                        mlog_errno(ret);
+                goto out;
+        }
+        /* XXX For now, until we make ocfs2_xa_prepare_entry() primary */
+        BUG_ON(ret == -ENOSPC);
+        ocfs2_xa_store_inline_value(&loc, xi);
+        xs->here = loc.xl_entry;
+
         ocfs2_xattr_bucket_journal_dirty(handle, xs->bucket);
 
 out: