From 3f9ca75516a7e581ff803f751a869c1da5ae5fa5 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Fri, 9 Dec 2016 11:57:43 +0100 Subject: bad_inode: add missing i_op initializers New inode operations were forgotten to be added to bad_inode. Most of the time the op is checked for NULL before being called but marking the inode bad and the check can race (very unlikely). However in case of ->get_link() only DCACHE_SYMLINK_TYPE is checked before calling the op, so there's no race and will definitely oops when trying to follow links on such a beast. Also remove comments about extinct ops. Signed-off-by: Miklos Szeredi Cc: --- fs/bad_inode.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 51 insertions(+), 4 deletions(-) diff --git a/fs/bad_inode.c b/fs/bad_inode.c index 8712062275b8..5f685c819298 100644 --- a/fs/bad_inode.c +++ b/fs/bad_inode.c @@ -106,6 +106,50 @@ static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer, return -EIO; } +static const char *bad_inode_get_link(struct dentry *dentry, + struct inode *inode, + struct delayed_call *done) +{ + return ERR_PTR(-EIO); +} + +static struct posix_acl *bad_inode_get_acl(struct inode *inode, int type) +{ + return ERR_PTR(-EIO); +} + +static int bad_inode_fiemap(struct inode *inode, + struct fiemap_extent_info *fieinfo, u64 start, + u64 len) +{ + return -EIO; +} + +static int bad_inode_update_time(struct inode *inode, struct timespec *time, + int flags) +{ + return -EIO; +} + +static int bad_inode_atomic_open(struct inode *inode, struct dentry *dentry, + struct file *file, unsigned int open_flag, + umode_t create_mode, int *opened) +{ + return -EIO; +} + +static int bad_inode_tmpfile(struct inode *inode, struct dentry *dentry, + umode_t mode) +{ + return -EIO; +} + +static int bad_inode_set_acl(struct inode *inode, struct posix_acl *acl, + int type) +{ + return -EIO; +} + static const struct inode_operations bad_inode_ops = { .create = bad_inode_create, @@ -118,14 +162,17 @@ static const struct inode_operations bad_inode_ops = .mknod = bad_inode_mknod, .rename = bad_inode_rename2, .readlink = bad_inode_readlink, - /* follow_link must be no-op, otherwise unmounting this inode - won't work */ - /* put_link returns void */ - /* truncate returns void */ .permission = bad_inode_permission, .getattr = bad_inode_getattr, .setattr = bad_inode_setattr, .listxattr = bad_inode_listxattr, + .get_link = bad_inode_get_link, + .get_acl = bad_inode_get_acl, + .fiemap = bad_inode_fiemap, + .update_time = bad_inode_update_time, + .atomic_open = bad_inode_atomic_open, + .tmpfile = bad_inode_tmpfile, + .set_acl = bad_inode_set_acl, }; -- cgit v1.2.3