acl.c (03ab8e6297acd1bc0eedaa050e2a1635c576fd11) acl.c (6cd4d4e8b6e1495eb0cafa3a59d1fde137a98d22)
1// SPDX-License-Identifier: LGPL-2.1
2/*
3 * Copyright IBM Corporation, 2010
4 * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
5 */
6
7#include <linux/module.h>
8#include <linux/fs.h>
9#include <net/9p/9p.h>
10#include <net/9p/client.h>
11#include <linux/slab.h>
12#include <linux/sched.h>
13#include <linux/posix_acl_xattr.h>
14#include "xattr.h"
15#include "acl.h"
16#include "v9fs.h"
17#include "v9fs_vfs.h"
18#include "fid.h"
19
1// SPDX-License-Identifier: LGPL-2.1
2/*
3 * Copyright IBM Corporation, 2010
4 * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
5 */
6
7#include <linux/module.h>
8#include <linux/fs.h>
9#include <net/9p/9p.h>
10#include <net/9p/client.h>
11#include <linux/slab.h>
12#include <linux/sched.h>
13#include <linux/posix_acl_xattr.h>
14#include "xattr.h"
15#include "acl.h"
16#include "v9fs.h"
17#include "v9fs_vfs.h"
18#include "fid.h"
19
20static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, char *name)
20static struct posix_acl *v9fs_fid_get_acl(struct p9_fid *fid, const char *name)
21{
22 ssize_t size;
23 void *value = NULL;
24 struct posix_acl *acl = NULL;
25
26 size = v9fs_fid_xattr_get(fid, name, NULL, 0);
21{
22 ssize_t size;
23 void *value = NULL;
24 struct posix_acl *acl = NULL;
25
26 size = v9fs_fid_xattr_get(fid, name, NULL, 0);
27 if (size > 0) {
28 value = kzalloc(size, GFP_NOFS);
29 if (!value)
30 return ERR_PTR(-ENOMEM);
31 size = v9fs_fid_xattr_get(fid, name, value, size);
32 if (size > 0) {
33 acl = posix_acl_from_xattr(&init_user_ns, value, size);
34 if (IS_ERR(acl))
35 goto err_out;
36 }
37 } else if (size == -ENODATA || size == 0 ||
38 size == -ENOSYS || size == -EOPNOTSUPP) {
39 acl = NULL;
40 } else
41 acl = ERR_PTR(-EIO);
27 if (size < 0)
28 return ERR_PTR(size);
29 if (size == 0)
30 return ERR_PTR(-ENODATA);
42
31
43err_out:
32 value = kzalloc(size, GFP_NOFS);
33 if (!value)
34 return ERR_PTR(-ENOMEM);
35
36 size = v9fs_fid_xattr_get(fid, name, value, size);
37 if (size < 0)
38 acl = ERR_PTR(size);
39 else if (size == 0)
40 acl = ERR_PTR(-ENODATA);
41 else
42 acl = posix_acl_from_xattr(&init_user_ns, value, size);
44 kfree(value);
45 return acl;
46}
47
43 kfree(value);
44 return acl;
45}
46
47static struct posix_acl *v9fs_acl_get(struct dentry *dentry, const char *name)
48{
49 struct p9_fid *fid;
50 struct posix_acl *acl = NULL;
51
52 fid = v9fs_fid_lookup(dentry);
53 if (IS_ERR(fid))
54 return ERR_CAST(fid);
55
56 acl = v9fs_fid_get_acl(fid, name);
57 p9_fid_put(fid);
58 return acl;
59}
60
61static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, const char *name)
62{
63 int retval;
64 struct posix_acl *acl = NULL;
65
66 acl = v9fs_fid_get_acl(fid, name);
67 if (!IS_ERR(acl))
68 return acl;
69
70 retval = PTR_ERR(acl);
71 if (retval == -ENODATA || retval == -ENOSYS || retval == -EOPNOTSUPP)
72 return NULL;
73
74 /* map everything else to -EIO */
75 return ERR_PTR(-EIO);
76}
77
48int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
49{
50 int retval = 0;
51 struct posix_acl *pacl, *dacl;
52 struct v9fs_session_info *v9ses;
53
54 v9ses = v9fs_inode2v9ses(inode);
55 if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||

--- 28 unchanged lines hidden (view full) ---

84 * 9p Always cache the acl value when
85 * instantiating the inode (v9fs_inode_from_fid)
86 */
87 acl = get_cached_acl(inode, type);
88 BUG_ON(is_uncached_acl(acl));
89 return acl;
90}
91
78int v9fs_get_acl(struct inode *inode, struct p9_fid *fid)
79{
80 int retval = 0;
81 struct posix_acl *pacl, *dacl;
82 struct v9fs_session_info *v9ses;
83
84 v9ses = v9fs_inode2v9ses(inode);
85 if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||

--- 28 unchanged lines hidden (view full) ---

114 * 9p Always cache the acl value when
115 * instantiating the inode (v9fs_inode_from_fid)
116 */
117 acl = get_cached_acl(inode, type);
118 BUG_ON(is_uncached_acl(acl));
119 return acl;
120}
121
92struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type, bool rcu)
122struct posix_acl *v9fs_iop_get_inode_acl(struct inode *inode, int type, bool rcu)
93{
94 struct v9fs_session_info *v9ses;
95
96 if (rcu)
97 return ERR_PTR(-ECHILD);
98
99 v9ses = v9fs_inode2v9ses(inode);
100 if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
101 ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
102 /*
103 * On access = client and acl = on mode get the acl
104 * values from the server
105 */
106 return NULL;
107 }
108 return v9fs_get_cached_acl(inode, type);
109
110}
111
123{
124 struct v9fs_session_info *v9ses;
125
126 if (rcu)
127 return ERR_PTR(-ECHILD);
128
129 v9ses = v9fs_inode2v9ses(inode);
130 if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) ||
131 ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) {
132 /*
133 * On access = client and acl = on mode get the acl
134 * values from the server
135 */
136 return NULL;
137 }
138 return v9fs_get_cached_acl(inode, type);
139
140}
141
142struct posix_acl *v9fs_iop_get_acl(struct user_namespace *mnt_userns,
143 struct dentry *dentry, int type)
144{
145 struct v9fs_session_info *v9ses;
146
147 v9ses = v9fs_dentry2v9ses(dentry);
148 /* We allow set/get/list of acl when access=client is not specified. */
149 if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
150 return v9fs_acl_get(dentry, posix_acl_xattr_name(type));
151 return v9fs_get_cached_acl(d_inode(dentry), type);
152}
153
112static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl)
113{
114 int retval;
115 char *name;
116 size_t size;
117 void *buffer;
118
119 if (!acl)

--- 211 unchanged lines hidden --- 		154static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl)
155{
156 int retval;
157 char *name;
158 size_t size;
159 void *buffer;
160
161 if (!acl)

--- 211 unchanged lines hidden ---