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vfs: split out vfs_getattr_nosec

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The filehandle lookup code wants this version of getattr.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
J. Bruce Fields 2013-10-02 17:01:18 -04:00 committed by Al Viro
parent 5a3cd99285
commit b7a6ec52dd
2 changed files with 26 additions and 6 deletions
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31
fs/stat.c
View File

@ -37,14 +37,21 @@ void generic_fillattr(struct inode *inode, struct kstat *stat)
EXPORT_SYMBOL(generic_fillattr);
int vfs_getattr(struct path *path, struct kstat *stat)
/**
* vfs_getattr_nosec - getattr without security checks
* @path: file to get attributes from
* @stat: structure to return attributes in
*
* Get attributes without calling security_inode_getattr.
*
* Currently the only caller other than vfs_getattr is internal to the
* filehandle lookup code, which uses only the inode number and returns
* no attributes to any user. Any other code probably wants
* vfs_getattr.
*/
int vfs_getattr_nosec(struct path *path, struct kstat *stat)
{
struct inode *inode = path->dentry->d_inode;
int retval;
retval = security_inode_getattr(path->mnt, path->dentry);
if (retval)
return retval;
if (inode->i_op->getattr)
return inode->i_op->getattr(path->mnt, path->dentry, stat);
@ -53,6 +60,18 @@ int vfs_getattr(struct path *path, struct kstat *stat)
return 0;
}
EXPORT_SYMBOL(vfs_getattr_nosec);
int vfs_getattr(struct path *path, struct kstat *stat)
{
int retval;
retval = security_inode_getattr(path->mnt, path->dentry);
if (retval)
return retval;
return vfs_getattr_nosec(path, stat);
}
EXPORT_SYMBOL(vfs_getattr);
int vfs_fstat(unsigned int fd, struct kstat *stat)

1
include/linux/fs.h
View File

@ -2504,6 +2504,7 @@ extern const struct inode_operations page_symlink_inode_operations;
extern void kfree_put_link(struct dentry *, struct nameidata *, void *);
extern int generic_readlink(struct dentry *, char __user *, int);
extern void generic_fillattr(struct inode *, struct kstat *);
int vfs_getattr_nosec(struct path *path, struct kstat *stat);
extern int vfs_getattr(struct path *, struct kstat *);
void __inode_add_bytes(struct inode *inode, loff_t bytes);
void inode_add_bytes(struct inode *inode, loff_t bytes);