ocfs2: Use ocfs2_extent_list instead of ocfs2_dinode.

ocfs2_extend_meta_needed(), ocfs2_calc_extend_credits() and
ocfs2_reserve_new_metadata() are all useful for extent tree operations. But
they are all limited to an inode btree because they use a struct
ocfs2_dinode parameter. Change their parameter to struct ocfs2_extent_list
(the part of an ocfs2_dinode they actually use) so that the xattr btree code
can use these functions.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 377acb2..dc36cd1 100644 (file)
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -4527,7 +4527,8 @@ static int ocfs2_split_tree(struct inode *inode, struct buffer_head *di_bh,
        } else
                rightmost_el = path_leaf_el(path);
 
-       credits += path->p_tree_depth + ocfs2_extend_meta_needed(di);
+       credits += path->p_tree_depth +
+                  ocfs2_extend_meta_needed(&di->id2.i_list);
        ret = ocfs2_extend_trans(handle, credits);
        if (ret) {
                mlog_errno(ret);

diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index 5c0f764..a0e334f 100644 (file)
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -48,8 +48,14 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh,
 int ocfs2_num_free_extents(struct ocfs2_super *osb,
                           struct inode *inode,
                           struct buffer_head *bh);
-/* how many new metadata chunks would an allocation need at maximum? */
-static inline int ocfs2_extend_meta_needed(struct ocfs2_dinode *fe)
+/*
+ * how many new metadata chunks would an allocation need at maximum?
+ *
+ * Please note that the caller must make sure that root_el is the root
+ * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
+ * the result may be wrong.
+ */
+static inline int ocfs2_extend_meta_needed(struct ocfs2_extent_list *root_el)
 {
        /*
         * Rather than do all the work of determining how much we need
@@ -59,7 +65,7 @@ static inline int ocfs2_extend_meta_needed(struct ocfs2_dinode *fe)
         * new tree_depth==0 extent_block, and one block at the new
         * top-of-the tree.
         */
-       return le16_to_cpu(fe->id2.i_list.l_tree_depth) + 2;
+       return le16_to_cpu(root_el->l_tree_depth) + 2;
 }
 
 void ocfs2_dinode_new_extent_list(struct inode *inode, struct ocfs2_dinode *di);

diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index e2008dc..bbe3f8b 100644 (file)
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1720,7 +1720,8 @@ int ocfs2_write_begin_nolock(struct address_space *mapping,
                        goto out;
                }
 
-               credits = ocfs2_calc_extend_credits(inode->i_sb, di,
+               credits = ocfs2_calc_extend_credits(inode->i_sb,
+                                                   &di->id2.i_list,
                                                    clusters_to_alloc);
 
        }

diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index fda09c3..126aa21 100644 (file)
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -1430,6 +1430,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
        int credits, num_free_extents, drop_alloc_sem = 0;
        loff_t dir_i_size;
        struct ocfs2_dinode *fe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
+       struct ocfs2_extent_list *el = &fe->id2.i_list;
        struct ocfs2_alloc_context *data_ac = NULL;
        struct ocfs2_alloc_context *meta_ac = NULL;
        handle_t *handle = NULL;
@@ -1488,7 +1489,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                }
 
                if (!num_free_extents) {
-                       status = ocfs2_reserve_new_metadata(osb, fe, &meta_ac);
+                       status = ocfs2_reserve_new_metadata(osb, el, &meta_ac);
                        if (status < 0) {
                                if (status != -ENOSPC)
                                        mlog_errno(status);
@@ -1503,7 +1504,7 @@ static int ocfs2_extend_dir(struct ocfs2_super *osb,
                        goto bail;
                }
 
-               credits = ocfs2_calc_extend_credits(sb, fe, 1);
+               credits = ocfs2_calc_extend_credits(sb, el, 1);
        } else {
                spin_unlock(&OCFS2_I(dir)->ip_lock);
                credits = OCFS2_SIMPLE_DIR_EXTEND_CREDITS;

diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index b6c483d..a31bba6 100644 (file)
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -540,7 +540,7 @@ int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
                goto leave;
        } else if ((!free_extents)
                   && (ocfs2_alloc_context_bits_left(meta_ac)
-                      < ocfs2_extend_meta_needed(fe))) {
+                      < ocfs2_extend_meta_needed(&fe->id2.i_list))) {
                mlog(0, "filesystem is really fragmented...\n");
                status = -EAGAIN;
                reason = RESTART_META;
@@ -652,7 +652,7 @@ int ocfs2_lock_allocators(struct inode *inode, struct buffer_head *di_bh,
         */
        if (!num_free_extents ||
            (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) {
-               ret = ocfs2_reserve_new_metadata(osb, di, meta_ac);
+               ret = ocfs2_reserve_new_metadata(osb, &di->id2.i_list, meta_ac);
                if (ret < 0) {
                        if (ret != -ENOSPC)
                                mlog_errno(ret);
@@ -732,7 +732,8 @@ restart_all:
                goto leave;
        }
 
-       credits = ocfs2_calc_extend_credits(osb->sb, fe, clusters_to_add);
+       credits = ocfs2_calc_extend_credits(osb->sb, &fe->id2.i_list,
+                                           clusters_to_add);
        handle = ocfs2_start_trans(osb, credits);
        if (IS_ERR(handle)) {
                status = PTR_ERR(handle);
@@ -790,7 +791,7 @@ restarted_transaction:
                        mlog(0, "restarting transaction.\n");
                        /* TODO: This can be more intelligent. */
                        credits = ocfs2_calc_extend_credits(osb->sb,
-                                                           fe,
+                                                           &fe->id2.i_list,
                                                            clusters_to_add);
                        status = ocfs2_extend_trans(handle, credits);
                        if (status < 0) {

diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index 2178ebf..9485f80 100644 (file)
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -340,11 +340,16 @@ int                  ocfs2_journal_dirty_data(handle_t *handle,
 #define OCFS2_RENAME_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 3              \
                             + OCFS2_UNLINK_CREDITS)
 
+/*
+ * Please note that the caller must make sure that root_el is the root
+ * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
+ * the result may be wrong.
+ */
 static inline int ocfs2_calc_extend_credits(struct super_block *sb,
-                                           struct ocfs2_dinode *fe,
+                                           struct ocfs2_extent_list *root_el,
                                            u32 bits_wanted)
 {
-       int bitmap_blocks, sysfile_bitmap_blocks, dinode_blocks;
+       int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks;
 
        /* bitmap dinode, group desc. + relinked group. */
        bitmap_blocks = OCFS2_SUBALLOC_ALLOC;
@@ -355,16 +360,16 @@ static inline int ocfs2_calc_extend_credits(struct super_block *sb,
         * however many metadata chunks needed * a remaining suballoc
         * alloc. */
        sysfile_bitmap_blocks = 1 +
-               (OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(fe);
+               (OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el);
 
        /* this does not include *new* metadata blocks, which are
-        * accounted for in sysfile_bitmap_blocks. fe +
+        * accounted for in sysfile_bitmap_blocks. root_el +
         * prev. last_eb_blk + blocks along edge of tree.
         * calc_symlink_credits passes because we just need 1
         * credit for the dinode there. */
-       dinode_blocks = 1 + 1 + le16_to_cpu(fe->id2.i_list.l_tree_depth);
+       extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth);
 
-       return bitmap_blocks + sysfile_bitmap_blocks + dinode_blocks;
+       return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks;
 }
 
 static inline int ocfs2_calc_symlink_credits(struct super_block *sb)

diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index de7b93d..2a817bc 100644 (file)
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -494,7 +494,7 @@ bail:
 }
 
 int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
-                              struct ocfs2_dinode *fe,
+                              struct ocfs2_extent_list *root_el,
                               struct ocfs2_alloc_context **ac)
 {
        int status;
@@ -507,7 +507,7 @@ int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
                goto bail;
        }
 
-       (*ac)->ac_bits_wanted = ocfs2_extend_meta_needed(fe);
+       (*ac)->ac_bits_wanted = ocfs2_extend_meta_needed(root_el);
        (*ac)->ac_which = OCFS2_AC_USE_META;
        slot = osb->slot_num;
        (*ac)->ac_group_search = ocfs2_block_group_search;

diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h
index 40d51da..3f96c87 100644 (file)
--- a/fs/ocfs2/suballoc.h
+++ b/fs/ocfs2/suballoc.h
@@ -59,8 +59,13 @@ static inline int ocfs2_alloc_context_bits_left(struct ocfs2_alloc_context *ac)
        return ac->ac_bits_wanted - ac->ac_bits_given;
 }
 
+/*
+ * Please note that the caller must make sure that root_el is the root
+ * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
+ * the result may be wrong.
+ */
 int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
-                              struct ocfs2_dinode *fe,
+                              struct ocfs2_extent_list *root_el,
                               struct ocfs2_alloc_context **ac);
 int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
                            struct ocfs2_alloc_context **ac);