linux-stable/fs/ext4/xattr_security.c
Andreas Gruenbacher 764a5c6b1f xattr handlers: Simplify list operation
Change the list operation to only return whether or not an attribute
should be listed.  Copying the attribute names into the buffer is moved
to the callers.

Since the result only depends on the dentry and not on the attribute
name, we do not pass the attribute name to list operations.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2015-12-13 19:46:12 -05:00

63 lines
1.5 KiB
C

/*
* linux/fs/ext4/xattr_security.c
* Handler for storing security labels as extended attributes.
*/
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/security.h>
#include <linux/slab.h>
#include "ext4_jbd2.h"
#include "ext4.h"
#include "xattr.h"
static int
ext4_xattr_security_get(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
void *buffer, size_t size)
{
return ext4_xattr_get(d_inode(dentry), EXT4_XATTR_INDEX_SECURITY,
name, buffer, size);
}
static int
ext4_xattr_security_set(const struct xattr_handler *handler,
struct dentry *dentry, const char *name,
const void *value, size_t size, int flags)
{
return ext4_xattr_set(d_inode(dentry), EXT4_XATTR_INDEX_SECURITY,
name, value, size, flags);
}
static int
ext4_initxattrs(struct inode *inode, const struct xattr *xattr_array,
void *fs_info)
{
const struct xattr *xattr;
handle_t *handle = fs_info;
int err = 0;
for (xattr = xattr_array; xattr->name != NULL; xattr++) {
err = ext4_xattr_set_handle(handle, inode,
EXT4_XATTR_INDEX_SECURITY,
xattr->name, xattr->value,
xattr->value_len, 0);
if (err < 0)
break;
}
return err;
}
int
ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir,
const struct qstr *qstr)
{
return security_inode_init_security(inode, dir, qstr,
&ext4_initxattrs, handle);
}
const struct xattr_handler ext4_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
.get = ext4_xattr_security_get,
.set = ext4_xattr_security_set,
};