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-rw-r--r--fs/inode.c36
1 files changed, 27 insertions, 9 deletions
diff --git a/fs/inode.c b/fs/inode.c
index c99163b1b31..14084b72b25 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -165,7 +165,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
mapping->host = inode;
mapping->flags = 0;
mapping_set_gfp_mask(mapping, GFP_HIGHUSER_MOVABLE);
- mapping->assoc_mapping = NULL;
+ mapping->private_data = NULL;
mapping->backing_dev_info = &default_backing_dev_info;
mapping->writeback_index = 0;
@@ -182,7 +182,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
}
inode->i_private = NULL;
inode->i_mapping = mapping;
- INIT_LIST_HEAD(&inode->i_dentry); /* buggered by rcu freeing */
+ INIT_HLIST_HEAD(&inode->i_dentry); /* buggered by rcu freeing */
#ifdef CONFIG_FS_POSIX_ACL
inode->i_acl = inode->i_default_acl = ACL_NOT_CACHED;
#endif
@@ -348,7 +348,7 @@ void address_space_init_once(struct address_space *mapping)
mutex_init(&mapping->i_mmap_mutex);
INIT_LIST_HEAD(&mapping->private_list);
spin_lock_init(&mapping->private_lock);
- INIT_RAW_PRIO_TREE_ROOT(&mapping->i_mmap);
+ mapping->i_mmap = RB_ROOT;
INIT_LIST_HEAD(&mapping->i_mmap_nonlinear);
}
EXPORT_SYMBOL(address_space_init_once);
@@ -408,6 +408,19 @@ static void inode_lru_list_add(struct inode *inode)
spin_unlock(&inode->i_sb->s_inode_lru_lock);
}
+/*
+ * Add inode to LRU if needed (inode is unused and clean).
+ *
+ * Needs inode->i_lock held.
+ */
+void inode_add_lru(struct inode *inode)
+{
+ if (!(inode->i_state & (I_DIRTY | I_SYNC | I_FREEING | I_WILL_FREE)) &&
+ !atomic_read(&inode->i_count) && inode->i_sb->s_flags & MS_ACTIVE)
+ inode_lru_list_add(inode);
+}
+
+
static void inode_lru_list_del(struct inode *inode)
{
spin_lock(&inode->i_sb->s_inode_lru_lock);
@@ -1390,8 +1403,7 @@ static void iput_final(struct inode *inode)
if (!drop && (sb->s_flags & MS_ACTIVE)) {
inode->i_state |= I_REFERENCED;
- if (!(inode->i_state & (I_DIRTY|I_SYNC)))
- inode_lru_list_add(inode);
+ inode_add_lru(inode);
spin_unlock(&inode->i_lock);
return;
}
@@ -1542,18 +1554,24 @@ void touch_atime(struct path *path)
if (timespec_equal(&inode->i_atime, &now))
return;
- if (mnt_want_write(mnt))
+ if (!sb_start_write_trylock(inode->i_sb))
return;
+ if (__mnt_want_write(mnt))
+ goto skip_update;
/*
* File systems can error out when updating inodes if they need to
* allocate new space to modify an inode (such is the case for
* Btrfs), but since we touch atime while walking down the path we
* really don't care if we failed to update the atime of the file,
* so just ignore the return value.
+ * We may also fail on filesystems that have the ability to make parts
+ * of the fs read only, e.g. subvolumes in Btrfs.
*/
update_time(inode, &now, S_ATIME);
- mnt_drop_write(mnt);
+ __mnt_drop_write(mnt);
+skip_update:
+ sb_end_write(inode->i_sb);
}
EXPORT_SYMBOL(touch_atime);
@@ -1660,11 +1678,11 @@ int file_update_time(struct file *file)
return 0;
/* Finally allowed to write? Takes lock. */
- if (mnt_want_write_file(file))
+ if (__mnt_want_write_file(file))
return 0;
ret = update_time(inode, &now, sync_it);
- mnt_drop_write_file(file);
+ __mnt_drop_write_file(file);
return ret;
}