Contributors: 18
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Josef Bacik |
280 |
52.43% |
3 |
10.00% |
| Yan Zheng |
44 |
8.24% |
1 |
3.33% |
| Jan Kara |
35 |
6.55% |
1 |
3.33% |
| Christoph Hellwig |
29 |
5.43% |
3 |
10.00% |
| Ernesto A. Fernández |
22 |
4.12% |
1 |
3.33% |
| Anand Jain |
21 |
3.93% |
1 |
3.33% |
| Filipe David Borba Manana |
18 |
3.37% |
1 |
3.33% |
| Chris Mason |
18 |
3.37% |
3 |
10.00% |
| Miklos Szeredi |
14 |
2.62% |
1 |
3.33% |
| Zheng Yan |
9 |
1.69% |
1 |
3.33% |
| Chengguang Xu |
9 |
1.69% |
3 |
10.00% |
| Christian Brauner |
7 |
1.31% |
3 |
10.00% |
| Eric W. Biedermann |
6 |
1.12% |
1 |
3.33% |
| Tsutomu Itoh |
6 |
1.12% |
1 |
3.33% |
| David Sterba |
6 |
1.12% |
3 |
10.00% |
| Andreas Gruenbacher |
4 |
0.75% |
1 |
3.33% |
| Tejun Heo |
3 |
0.56% |
1 |
3.33% |
| Al Viro |
3 |
0.56% |
1 |
3.33% |
| Total |
534 |
|
30 |
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2007 Red Hat. All rights reserved.
*/
#include <linux/fs.h>
#include <linux/string.h>
#include <linux/xattr.h>
#include <linux/posix_acl_xattr.h>
#include <linux/posix_acl.h>
#include <linux/sched.h>
#include <linux/sched/mm.h>
#include <linux/slab.h>
#include "ctree.h"
#include "btrfs_inode.h"
#include "xattr.h"
struct posix_acl *btrfs_get_acl(struct inode *inode, int type, bool rcu)
{
int size;
const char *name;
char *value = NULL;
struct posix_acl *acl;
if (rcu)
return ERR_PTR(-ECHILD);
switch (type) {
case ACL_TYPE_ACCESS:
name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
return ERR_PTR(-EINVAL);
}
size = btrfs_getxattr(inode, name, NULL, 0);
if (size > 0) {
value = kzalloc(size, GFP_KERNEL);
if (!value)
return ERR_PTR(-ENOMEM);
size = btrfs_getxattr(inode, name, value, size);
}
if (size > 0)
acl = posix_acl_from_xattr(&init_user_ns, value, size);
else if (size == -ENODATA || size == 0)
acl = NULL;
else
acl = ERR_PTR(size);
kfree(value);
return acl;
}
int __btrfs_set_acl(struct btrfs_trans_handle *trans, struct inode *inode,
struct posix_acl *acl, int type)
{
int ret, size = 0;
const char *name;
char *value = NULL;
switch (type) {
case ACL_TYPE_ACCESS:
name = XATTR_NAME_POSIX_ACL_ACCESS;
break;
case ACL_TYPE_DEFAULT:
if (!S_ISDIR(inode->i_mode))
return acl ? -EINVAL : 0;
name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
return -EINVAL;
}
if (acl) {
unsigned int nofs_flag;
size = posix_acl_xattr_size(acl->a_count);
/*
* We're holding a transaction handle, so use a NOFS memory
* allocation context to avoid deadlock if reclaim happens.
*/
nofs_flag = memalloc_nofs_save();
value = kmalloc(size, GFP_KERNEL);
memalloc_nofs_restore(nofs_flag);
if (!value) {
ret = -ENOMEM;
goto out;
}
ret = posix_acl_to_xattr(&init_user_ns, acl, value, size);
if (ret < 0)
goto out;
}
if (trans)
ret = btrfs_setxattr(trans, inode, name, value, size, 0);
else
ret = btrfs_setxattr_trans(inode, name, value, size, 0);
out:
kfree(value);
if (!ret)
set_cached_acl(inode, type, acl);
return ret;
}
int btrfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
struct posix_acl *acl, int type)
{
int ret;
umode_t old_mode = inode->i_mode;
if (type == ACL_TYPE_ACCESS && acl) {
ret = posix_acl_update_mode(mnt_userns, inode,
&inode->i_mode, &acl);
if (ret)
return ret;
}
ret = __btrfs_set_acl(NULL, inode, acl, type);
if (ret)
inode->i_mode = old_mode;
return ret;
}