}
static int nilfs_mdt_read_block(struct inode *inode, unsigned long block,
- struct buffer_head **out_bh)
+ int readahead, struct buffer_head **out_bh)
{
struct buffer_head *first_bh, *bh;
unsigned long blkoff;
if (unlikely(err))
goto failed;
- blkoff = block + 1;
- for (i = 0; i < nr_ra_blocks; i++, blkoff++) {
- err = nilfs_mdt_submit_block(inode, blkoff, READA, &bh);
- if (likely(!err || err == -EEXIST))
- brelse(bh);
- else if (err != -EBUSY)
- break; /* abort readahead if bmap lookup failed */
-
- if (!buffer_locked(first_bh))
- goto out_no_wait;
+ if (readahead) {
+ blkoff = block + 1;
+ for (i = 0; i < nr_ra_blocks; i++, blkoff++) {
+ err = nilfs_mdt_submit_block(inode, blkoff, READA, &bh);
+ if (likely(!err || err == -EEXIST))
+ brelse(bh);
+ else if (err != -EBUSY)
+ break;
+ /* abort readahead if bmap lookup failed */
+ if (!buffer_locked(first_bh))
+ goto out_no_wait;
+ }
}
wait_on_buffer(first_bh);
/* Should be rewritten with merging nilfs_mdt_read_block() */
retry:
- ret = nilfs_mdt_read_block(inode, blkoff, out_bh);
+ ret = nilfs_mdt_read_block(inode, blkoff, !create, out_bh);
if (!create || ret != -ENOENT)
return ret;
struct buffer_head *bh;
int err;
- err = nilfs_mdt_read_block(inode, block, &bh);
+ err = nilfs_mdt_read_block(inode, block, 0, &bh);
if (unlikely(err))
return err;
nilfs_mark_buffer_dirty(bh);
* longer than those of the super block structs; they may continue for
* several consecutive mounts/umounts. This would need discussions.
*/
+/**
+ * nilfs_mdt_new_common - allocate a pseudo inode for metadata file
+ * @nilfs: nilfs object
+ * @sb: super block instance the metadata file belongs to
+ * @ino: inode number
+ * @gfp_mask: gfp mask for data pages
+ * @objsz: size of the private object attached to inode->i_private
+ */
struct inode *
nilfs_mdt_new_common(struct the_nilfs *nilfs, struct super_block *sb,
- ino_t ino, gfp_t gfp_mask)
+ ino_t ino, gfp_t gfp_mask, size_t objsz)
{
struct inode *inode = nilfs_alloc_inode_common(nilfs);
return NULL;
else {
struct address_space * const mapping = &inode->i_data;
- struct nilfs_mdt_info *mi = kzalloc(sizeof(*mi), GFP_NOFS);
+ struct nilfs_mdt_info *mi;
+ mi = kzalloc(max(sizeof(*mi), objsz), GFP_NOFS);
if (!mi) {
nilfs_destroy_inode(inode);
return NULL;
}
struct inode *nilfs_mdt_new(struct the_nilfs *nilfs, struct super_block *sb,
- ino_t ino)
+ ino_t ino, size_t objsz)
{
- struct inode *inode = nilfs_mdt_new_common(nilfs, sb, ino,
- NILFS_MDT_GFP);
+ struct inode *inode;
+ inode = nilfs_mdt_new_common(nilfs, sb, ino, NILFS_MDT_GFP, objsz);
if (!inode)
return NULL;
&NILFS_I(orig)->i_btnode_cache;
}
-void nilfs_mdt_clear(struct inode *inode)
+static void nilfs_mdt_clear(struct inode *inode)
{
struct nilfs_inode_info *ii = NILFS_I(inode);
invalidate_mapping_pages(inode->i_mapping, 0, -1);
truncate_inode_pages(inode->i_mapping, 0);
- nilfs_bmap_clear(ii->i_bmap);
+ if (test_bit(NILFS_I_BMAP, &ii->i_state))
+ nilfs_bmap_clear(ii->i_bmap);
nilfs_btnode_cache_clear(&ii->i_btnode_cache);
}
{
struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
+ if (mdi->mi_palloc_cache)
+ nilfs_palloc_destroy_cache(inode);
+ nilfs_mdt_clear(inode);
+
kfree(mdi->mi_bgl); /* kfree(NULL) is safe */
kfree(mdi);
nilfs_destroy_inode(inode);