[PATCH v5 12/17] vfs: Use IOP_XATTR flag for bad-inode handling
From: Andreas Gruenbacher <agruenba@redhat.com>
Date: 2016-09-28 14:59:09
Also in:
linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
With this change, all the xattr handler based operations will produce an -EIO result for bad inodes, and we no longer only depend on inode->i_op to be set to bad_inode_ops. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> --- fs/bad_inode.c | 21 +-------------------- fs/xattr.c | 8 +++++++- 2 files changed, 8 insertions(+), 21 deletions(-)
diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index 3ba385e..7bb153c 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c@@ -100,29 +100,12 @@ static int bad_inode_setattr(struct dentry *direntry, struct iattr *attrs) return -EIO; } -static int bad_inode_setxattr(struct dentry *dentry, struct inode *inode, - const char *name, const void *value, size_t size, int flags) -{ - return -EIO; -} - -static ssize_t bad_inode_getxattr(struct dentry *dentry, struct inode *inode, - const char *name, void *buffer, size_t size) -{ - return -EIO; -} - static ssize_t bad_inode_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size) { return -EIO; } -static int bad_inode_removexattr(struct dentry *dentry, const char *name) -{ - return -EIO; -} - static const struct inode_operations bad_inode_ops = { .create = bad_inode_create,
@@ -142,10 +125,7 @@ static const struct inode_operations bad_inode_ops = .permission = bad_inode_permission, .getattr = bad_inode_getattr, .setattr = bad_inode_setattr, - .setxattr = bad_inode_setxattr, - .getxattr = bad_inode_getxattr, .listxattr = bad_inode_listxattr, - .removexattr = bad_inode_removexattr, };
@@ -175,6 +155,7 @@ void make_bad_inode(struct inode *inode) inode->i_atime = inode->i_mtime = inode->i_ctime = current_fs_time(inode->i_sb); inode->i_op = &bad_inode_ops; + inode->i_opflags &= ~IOP_XATTR; inode->i_fop = &bad_file_ops; } EXPORT_SYMBOL(make_bad_inode);
diff --git a/fs/xattr.c b/fs/xattr.c
index 38b52a3..1f5d0b4 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c@@ -58,8 +58,11 @@ xattr_resolve_name(struct inode *inode, const char **name) const struct xattr_handler **handlers = inode->i_sb->s_xattr; const struct xattr_handler *handler; - if (!(inode->i_opflags & IOP_XATTR)) + if (!(inode->i_opflags & IOP_XATTR)) { + if (unlikely(is_bad_inode(inode))) + return ERR_PTR(-EIO); return ERR_PTR(-EOPNOTSUPP); + } for_each_xattr_handler(handlers, handler) { const char *n;
@@ -168,6 +171,9 @@ int __vfs_setxattr_noperm(struct dentry *dentry, const char *name, } } else if (issec) { const char *suffix = name + XATTR_SECURITY_PREFIX_LEN; + + if (unlikely(is_bad_inode(inode))) + return -EIO; error = security_inode_setsecurity(inode, suffix, value, size, flags); if (!error)
--
2.7.4