logfs: get rid of magical inodes
ordering problems at ->kill_sb() time are solved by doing iput()
of these suckers in ->put_super()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/logfs/inode.c b/fs/logfs/inode.c
index f602e23..7811a2a 100644
--- a/fs/logfs/inode.c
+++ b/fs/logfs/inode.c
@@ -235,33 +235,21 @@
* purpose is to create a new inode that will not trigger the warning if such
* an inode is still in use. An ugly hack, no doubt. Suggections for
* improvement are welcome.
+ *
+ * AV: that's what ->put_super() is for...
*/
struct inode *logfs_new_meta_inode(struct super_block *sb, u64 ino)
{
struct inode *inode;
- inode = logfs_alloc_inode(sb);
+ inode = new_inode(sb);
if (!inode)
return ERR_PTR(-ENOMEM);
inode->i_mode = S_IFREG;
inode->i_ino = ino;
- inode->i_sb = sb;
-
- /* This is a blatant copy of alloc_inode code. We'd need alloc_inode
- * to be nonstatic, alas. */
- {
- struct address_space * const mapping = &inode->i_data;
-
- mapping->a_ops = &logfs_reg_aops;
- mapping->host = inode;
- mapping->flags = 0;
- mapping_set_gfp_mask(mapping, GFP_NOFS);
- mapping->assoc_mapping = NULL;
- mapping->backing_dev_info = &default_backing_dev_info;
- inode->i_mapping = mapping;
- inode->i_nlink = 1;
- }
+ inode->i_data.a_ops = &logfs_reg_aops;
+ mapping_set_gfp_mask(&inode->i_data, GFP_NOFS);
return inode;
}
@@ -277,7 +265,7 @@
err = logfs_read_inode(inode);
if (err) {
- destroy_meta_inode(inode);
+ iput(inode);
return ERR_PTR(err);
}
logfs_inode_setops(inode);
@@ -298,16 +286,6 @@
return ret;
}
-void destroy_meta_inode(struct inode *inode)
-{
- if (inode) {
- if (inode->i_data.nrpages)
- truncate_inode_pages(&inode->i_data, 0);
- logfs_clear_inode(inode);
- kmem_cache_free(logfs_inode_cache, logfs_inode(inode));
- }
-}
-
/* called with inode_lock held */
static void logfs_drop_inode(struct inode *inode)
{
@@ -384,12 +362,22 @@
return 0;
}
+static void logfs_put_super(struct super_block *sb)
+{
+ struct logfs_super *super = logfs_super(sb);
+ /* kill the meta-inodes */
+ iput(super->s_master_inode);
+ iput(super->s_segfile_inode);
+ iput(super->s_mapping_inode);
+}
+
const struct super_operations logfs_super_operations = {
.alloc_inode = logfs_alloc_inode,
.clear_inode = logfs_clear_inode,
.delete_inode = logfs_delete_inode,
.destroy_inode = logfs_destroy_inode,
.drop_inode = logfs_drop_inode,
+ .put_super = logfs_put_super,
.write_inode = logfs_write_inode,
.statfs = logfs_statfs,
.sync_fs = logfs_sync_fs,