- spin_lock(&si->si_lock);
- __ocfs2_fill_slot(si, slot_num, OCFS2_INVALID_SLOT);
- spin_unlock(&si->si_lock);
+ int status = 0;
+ u64 blkno;
+ unsigned long long blocks, bytes;
+ unsigned int i;
+ struct buffer_head *bh;
+
+ status = ocfs2_slot_map_physical_size(osb, si->si_inode, &bytes);
+ if (status)
+ goto bail;
+
+ blocks = ocfs2_blocks_for_bytes(si->si_inode->i_sb, bytes);
+ BUG_ON(blocks > UINT_MAX);
+ si->si_blocks = blocks;
+ if (!si->si_blocks)
+ goto bail;
+
+ if (si->si_extended)
+ si->si_slots_per_block =
+ (osb->sb->s_blocksize /
+ sizeof(struct ocfs2_extended_slot));
+ else
+ si->si_slots_per_block = osb->sb->s_blocksize / sizeof(__le16);
+
+ /* The size checks above should ensure this */
+ BUG_ON((osb->max_slots / si->si_slots_per_block) > blocks);
+
+ mlog(0, "Slot map needs %u buffers for %llu bytes\n",
+ si->si_blocks, bytes);
+
+ si->si_bh = kzalloc(sizeof(struct buffer_head *) * si->si_blocks,
+ GFP_KERNEL);
+ if (!si->si_bh) {
+ status = -ENOMEM;
+ mlog_errno(status);
+ goto bail;
+ }
+
+ for (i = 0; i < si->si_blocks; i++) {
+ status = ocfs2_extent_map_get_blocks(si->si_inode, i,
+ &blkno, NULL, NULL);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ mlog(0, "Reading slot map block %u at %llu\n", i,
+ (unsigned long long)blkno);
+
+ bh = NULL; /* Acquire a fresh bh */
+ status = ocfs2_read_block(osb, blkno, &bh, 0, si->si_inode);
+ if (status < 0) {
+ mlog_errno(status);
+ goto bail;
+ }
+
+ si->si_bh[i] = bh;
+ }
+
+bail:
+ return status;