Invoke fscache_resize_cookie() to adjust the size of the backing cache
object when setattr is called with ATTR_SIZE. This discards any data that
then lies beyond the revised EOF and frees up space.
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
---
fs/afs/inode.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 51e55bfadb54..c639de101065 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -847,6 +847,9 @@ static void afs_setattr_edit_file(struct afs_operation *op)
if (size < i_size)
truncate_pagecache(inode, size);
+ if (size != i_size)
+ fscache_resize_cookie(afs_vnode_cache(vp->vnode),
+ vp->scb.status.size);
}
}
@@ -889,6 +892,8 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr)
attr->ia_valid &= ~ATTR_SIZE;
}
+ fscache_use_cookie(afs_vnode_cache(vnode), true);
+
/* flush any dirty data outstanding on a regular file */
if (S_ISREG(vnode->vfs_inode.i_mode))
filemap_write_and_wait(vnode->vfs_inode.i_mapping);
@@ -919,6 +924,7 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr)
out_unlock:
up_write(&vnode->validate_lock);
+ fscache_unuse_cookie(afs_vnode_cache(vnode), NULL, NULL);
_leave(" = %d", ret);
return ret;
}
