Ocfs2/move_extents: helpers to update the group descriptor and global bitmap inode.

These helpers were actually borrowed from alloc.c, which may be publicized
later.

Signed-off-by: Tristan Ye <tristan.ye@oracle.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
index ebaff625fc28..390354a4ecb4 100644
--- a/fs/ocfs2/move_extents.c
+++ b/fs/ocfs2/move_extents.c
@@ -555,3 +555,80 @@ static void ocfs2_probe_alloc_group(struct inode *inode, struct buffer_head *bh,
 
         mlog(0, "found phys_cpos: %u to fit the wanted moving.\n", *phys_cpos);
 }
+
+static int ocfs2_alloc_dinode_update_counts(struct inode *inode,
+                                       handle_t *handle,
+                                       struct buffer_head *di_bh,
+                                       u32 num_bits,
+                                       u16 chain)
+{
+        int ret;
+        u32 tmp_used;
+        struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
+        struct ocfs2_chain_list *cl =
+                                (struct ocfs2_chain_list *) &di->id2.i_chain;
+
+        ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh,
+                                      OCFS2_JOURNAL_ACCESS_WRITE);
+        if (ret < 0) {
+                mlog_errno(ret);
+                goto out;
+        }
+
+        tmp_used = le32_to_cpu(di->id1.bitmap1.i_used);
+        di->id1.bitmap1.i_used = cpu_to_le32(num_bits + tmp_used);
+        le32_add_cpu(&cl->cl_recs[chain].c_free, -num_bits);
+        ocfs2_journal_dirty(handle, di_bh);
+
+out:
+        return ret;
+}
+
+static inline int ocfs2_block_group_set_bits(handle_t *handle,
+                                             struct inode *alloc_inode,
+                                             struct ocfs2_group_desc *bg,
+                                             struct buffer_head *group_bh,
+                                             unsigned int bit_off,
+                                             unsigned int num_bits)
+{
+        int status;
+        void *bitmap = bg->bg_bitmap;
+        int journal_type = OCFS2_JOURNAL_ACCESS_WRITE;
+
+        /* All callers get the descriptor via
+         * ocfs2_read_group_descriptor().  Any corruption is a code bug. */
+        BUG_ON(!OCFS2_IS_VALID_GROUP_DESC(bg));
+        BUG_ON(le16_to_cpu(bg->bg_free_bits_count) < num_bits);
+
+        mlog(0, "block_group_set_bits: off = %u, num = %u\n", bit_off,
+             num_bits);
+
+        if (ocfs2_is_cluster_bitmap(alloc_inode))
+                journal_type = OCFS2_JOURNAL_ACCESS_UNDO;
+
+        status = ocfs2_journal_access_gd(handle,
+                                         INODE_CACHE(alloc_inode),
+                                         group_bh,
+                                         journal_type);
+        if (status < 0) {
+                mlog_errno(status);
+                goto bail;
+        }
+
+        le16_add_cpu(&bg->bg_free_bits_count, -num_bits);
+        if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) {
+                ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit"
+                            " count %u but claims %u are freed. num_bits %d",
+                            (unsigned long long)le64_to_cpu(bg->bg_blkno),
+                            le16_to_cpu(bg->bg_bits),
+                            le16_to_cpu(bg->bg_free_bits_count), num_bits);
+                return -EROFS;
+        }
+        while (num_bits--)
+                ocfs2_set_bit(bit_off++, bitmap);
+
+        ocfs2_journal_dirty(handle, group_bh);
+
+bail:
+        return status;
+}