/hw/virtio-9p-xattr-user.c - Annotate - qemu - Greek Research and Technology Network's projects

root / hw / virtio-9p-xattr-user.c @ f19410ca

History | View | Annotate | Download (2.8 kB)

1	fc22118d	Aneesh Kumar K.V	/*
2	fc22118d	Aneesh Kumar K.V	* Virtio 9p user. xattr callback
3	fc22118d	Aneesh Kumar K.V	*
4	fc22118d	Aneesh Kumar K.V	* Copyright IBM, Corp. 2010
5	fc22118d	Aneesh Kumar K.V	*
6	fc22118d	Aneesh Kumar K.V	* Authors:
7	fc22118d	Aneesh Kumar K.V	* Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
8	fc22118d	Aneesh Kumar K.V	*
9	fc22118d	Aneesh Kumar K.V	* This work is licensed under the terms of the GNU GPL, version 2. See
10	fc22118d	Aneesh Kumar K.V	* the COPYING file in the top-level directory.
11	fc22118d	Aneesh Kumar K.V	*
12	fc22118d	Aneesh Kumar K.V	*/
13	fc22118d	Aneesh Kumar K.V
14	fc22118d	Aneesh Kumar K.V	#include <sys/types.h>
15	fc22118d	Aneesh Kumar K.V	#include "virtio.h"
16	fc22118d	Aneesh Kumar K.V	#include "virtio-9p.h"
17	fc22118d	Aneesh Kumar K.V	#include "file-op-9p.h"
18	fc22118d	Aneesh Kumar K.V	#include "virtio-9p-xattr.h"
19	fc22118d	Aneesh Kumar K.V
20	fc22118d	Aneesh Kumar K.V
21	fc22118d	Aneesh Kumar K.V	static ssize_t mp_user_getxattr(FsContext ctx, const char path,
22	fc22118d	Aneesh Kumar K.V	const char name, void value, size_t size)
23	fc22118d	Aneesh Kumar K.V	{
24	fc22118d	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.", 12) == 0) {
25	fc22118d	Aneesh Kumar K.V	/*
26	fc22118d	Aneesh Kumar K.V	* Don't allow fetch of user.virtfs namesapce
27	fc22118d	Aneesh Kumar K.V	* in case of mapped security
28	fc22118d	Aneesh Kumar K.V	*/
29	fc22118d	Aneesh Kumar K.V	errno = ENOATTR;
30	fc22118d	Aneesh Kumar K.V	return -1;
31	fc22118d	Aneesh Kumar K.V	}
32	fc22118d	Aneesh Kumar K.V	return lgetxattr(rpath(ctx, path), name, value, size);
33	fc22118d	Aneesh Kumar K.V	}
34	fc22118d	Aneesh Kumar K.V
35	fc22118d	Aneesh Kumar K.V	static ssize_t mp_user_listxattr(FsContext ctx, const char path,
36	fc22118d	Aneesh Kumar K.V	char name, void value, size_t size)
37	fc22118d	Aneesh Kumar K.V	{
38	fc22118d	Aneesh Kumar K.V	int name_size = strlen(name) + 1;
39	fc22118d	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.", 12) == 0) {
40	70fc55eb	Aneesh Kumar K.V
41	70fc55eb	Aneesh Kumar K.V	/* check if it is a mapped posix acl */
42	70fc55eb	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.system.posix_acl_", 29) == 0) {
43	70fc55eb	Aneesh Kumar K.V	/* adjust the name and size */
44	70fc55eb	Aneesh Kumar K.V	name += 12;
45	70fc55eb	Aneesh Kumar K.V	name_size -= 12;
46	70fc55eb	Aneesh Kumar K.V	} else {
47	70fc55eb	Aneesh Kumar K.V	/*
48	70fc55eb	Aneesh Kumar K.V	* Don't allow fetch of user.virtfs namesapce
49	70fc55eb	Aneesh Kumar K.V	* in case of mapped security
50	70fc55eb	Aneesh Kumar K.V	*/
51	70fc55eb	Aneesh Kumar K.V	return 0;
52	70fc55eb	Aneesh Kumar K.V	}
53	fc22118d	Aneesh Kumar K.V	}
54	fc22118d	Aneesh Kumar K.V	if (!value) {
55	fc22118d	Aneesh Kumar K.V	return name_size;
56	fc22118d	Aneesh Kumar K.V	}
57	fc22118d	Aneesh Kumar K.V
58	fc22118d	Aneesh Kumar K.V	if (size < name_size) {
59	fc22118d	Aneesh Kumar K.V	errno = ERANGE;
60	fc22118d	Aneesh Kumar K.V	return -1;
61	fc22118d	Aneesh Kumar K.V	}
62	fc22118d	Aneesh Kumar K.V
63	fc22118d	Aneesh Kumar K.V	strncpy(value, name, name_size);
64	fc22118d	Aneesh Kumar K.V	return name_size;
65	fc22118d	Aneesh Kumar K.V	}
66	fc22118d	Aneesh Kumar K.V
67	fc22118d	Aneesh Kumar K.V	static int mp_user_setxattr(FsContext ctx, const char path, const char *name,
68	fc22118d	Aneesh Kumar K.V	void *value, size_t size, int flags)
69	fc22118d	Aneesh Kumar K.V	{
70	fc22118d	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.", 12) == 0) {
71	fc22118d	Aneesh Kumar K.V	/*
72	fc22118d	Aneesh Kumar K.V	* Don't allow fetch of user.virtfs namesapce
73	fc22118d	Aneesh Kumar K.V	* in case of mapped security
74	fc22118d	Aneesh Kumar K.V	*/
75	fc22118d	Aneesh Kumar K.V	errno = EACCES;
76	fc22118d	Aneesh Kumar K.V	return -1;
77	fc22118d	Aneesh Kumar K.V	}
78	fc22118d	Aneesh Kumar K.V	return lsetxattr(rpath(ctx, path), name, value, size, flags);
79	fc22118d	Aneesh Kumar K.V	}
80	fc22118d	Aneesh Kumar K.V
81	fc22118d	Aneesh Kumar K.V	static int mp_user_removexattr(FsContext *ctx,
82	fc22118d	Aneesh Kumar K.V	const char path, const char name)
83	fc22118d	Aneesh Kumar K.V	{
84	fc22118d	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.", 12) == 0) {
85	fc22118d	Aneesh Kumar K.V	/*
86	fc22118d	Aneesh Kumar K.V	* Don't allow fetch of user.virtfs namesapce
87	fc22118d	Aneesh Kumar K.V	* in case of mapped security
88	fc22118d	Aneesh Kumar K.V	*/
89	fc22118d	Aneesh Kumar K.V	errno = EACCES;
90	fc22118d	Aneesh Kumar K.V	return -1;
91	fc22118d	Aneesh Kumar K.V	}
92	fc22118d	Aneesh Kumar K.V	return lremovexattr(rpath(ctx, path), name);
93	fc22118d	Aneesh Kumar K.V	}
94	fc22118d	Aneesh Kumar K.V
95	fc22118d	Aneesh Kumar K.V	XattrOperations mapped_user_xattr = {
96	fc22118d	Aneesh Kumar K.V	.name = "user.",
97	fc22118d	Aneesh Kumar K.V	.getxattr = mp_user_getxattr,
98	fc22118d	Aneesh Kumar K.V	.setxattr = mp_user_setxattr,
99	fc22118d	Aneesh Kumar K.V	.listxattr = mp_user_listxattr,
100	fc22118d	Aneesh Kumar K.V	.removexattr = mp_user_removexattr,
101	fc22118d	Aneesh Kumar K.V	};
102	fc22118d	Aneesh Kumar K.V
103	fc22118d	Aneesh Kumar K.V	XattrOperations passthrough_user_xattr = {
104	fc22118d	Aneesh Kumar K.V	.name = "user.",
105	fc22118d	Aneesh Kumar K.V	.getxattr = pt_getxattr,
106	fc22118d	Aneesh Kumar K.V	.setxattr = pt_setxattr,
107	fc22118d	Aneesh Kumar K.V	.listxattr = pt_listxattr,
108	fc22118d	Aneesh Kumar K.V	.removexattr = pt_removexattr,
109	fc22118d	Aneesh Kumar K.V	};

Archipelago » qemu

root / hw / virtio-9p-xattr-user.c @ f19410ca