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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	873c3213	Stefan Weil	#include "hw/virtio.h"
16	fc22118d	Aneesh Kumar K.V	#include "virtio-9p.h"
17	353ac78d	Aneesh Kumar K.V	#include "fsdev/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	faa44e3d	Venkateswararao Jujjuri (JV)	char buffer[PATH_MAX];
25	fc22118d	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.", 12) == 0) {
26	fc22118d	Aneesh Kumar K.V	/*
27	fc22118d	Aneesh Kumar K.V	* Don't allow fetch of user.virtfs namesapce
28	fc22118d	Aneesh Kumar K.V	* in case of mapped security
29	fc22118d	Aneesh Kumar K.V	*/
30	fc22118d	Aneesh Kumar K.V	errno = ENOATTR;
31	fc22118d	Aneesh Kumar K.V	return -1;
32	fc22118d	Aneesh Kumar K.V	}
33	faa44e3d	Venkateswararao Jujjuri (JV)	return lgetxattr(rpath(ctx, path, buffer), name, value, size);
34	fc22118d	Aneesh Kumar K.V	}
35	fc22118d	Aneesh Kumar K.V
36	fc22118d	Aneesh Kumar K.V	static ssize_t mp_user_listxattr(FsContext ctx, const char path,
37	fc22118d	Aneesh Kumar K.V	char name, void value, size_t size)
38	fc22118d	Aneesh Kumar K.V	{
39	fc22118d	Aneesh Kumar K.V	int name_size = strlen(name) + 1;
40	fc22118d	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.", 12) == 0) {
41	70fc55eb	Aneesh Kumar K.V
42	70fc55eb	Aneesh Kumar K.V	/* check if it is a mapped posix acl */
43	70fc55eb	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.system.posix_acl_", 29) == 0) {
44	70fc55eb	Aneesh Kumar K.V	/* adjust the name and size */
45	70fc55eb	Aneesh Kumar K.V	name += 12;
46	70fc55eb	Aneesh Kumar K.V	name_size -= 12;
47	70fc55eb	Aneesh Kumar K.V	} else {
48	70fc55eb	Aneesh Kumar K.V	/*
49	70fc55eb	Aneesh Kumar K.V	* Don't allow fetch of user.virtfs namesapce
50	70fc55eb	Aneesh Kumar K.V	* in case of mapped security
51	70fc55eb	Aneesh Kumar K.V	*/
52	70fc55eb	Aneesh Kumar K.V	return 0;
53	70fc55eb	Aneesh Kumar K.V	}
54	fc22118d	Aneesh Kumar K.V	}
55	fc22118d	Aneesh Kumar K.V	if (!value) {
56	fc22118d	Aneesh Kumar K.V	return name_size;
57	fc22118d	Aneesh Kumar K.V	}
58	fc22118d	Aneesh Kumar K.V
59	fc22118d	Aneesh Kumar K.V	if (size < name_size) {
60	fc22118d	Aneesh Kumar K.V	errno = ERANGE;
61	fc22118d	Aneesh Kumar K.V	return -1;
62	fc22118d	Aneesh Kumar K.V	}
63	fc22118d	Aneesh Kumar K.V
64	fc22118d	Aneesh Kumar K.V	strncpy(value, name, name_size);
65	fc22118d	Aneesh Kumar K.V	return name_size;
66	fc22118d	Aneesh Kumar K.V	}
67	fc22118d	Aneesh Kumar K.V
68	fc22118d	Aneesh Kumar K.V	static int mp_user_setxattr(FsContext ctx, const char path, const char *name,
69	fc22118d	Aneesh Kumar K.V	void *value, size_t size, int flags)
70	fc22118d	Aneesh Kumar K.V	{
71	faa44e3d	Venkateswararao Jujjuri (JV)	char buffer[PATH_MAX];
72	fc22118d	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.", 12) == 0) {
73	fc22118d	Aneesh Kumar K.V	/*
74	fc22118d	Aneesh Kumar K.V	* Don't allow fetch of user.virtfs namesapce
75	fc22118d	Aneesh Kumar K.V	* in case of mapped security
76	fc22118d	Aneesh Kumar K.V	*/
77	fc22118d	Aneesh Kumar K.V	errno = EACCES;
78	fc22118d	Aneesh Kumar K.V	return -1;
79	fc22118d	Aneesh Kumar K.V	}
80	faa44e3d	Venkateswararao Jujjuri (JV)	return lsetxattr(rpath(ctx, path, buffer), name, value, size, flags);
81	fc22118d	Aneesh Kumar K.V	}
82	fc22118d	Aneesh Kumar K.V
83	fc22118d	Aneesh Kumar K.V	static int mp_user_removexattr(FsContext *ctx,
84	fc22118d	Aneesh Kumar K.V	const char path, const char name)
85	fc22118d	Aneesh Kumar K.V	{
86	faa44e3d	Venkateswararao Jujjuri (JV)	char buffer[PATH_MAX];
87	fc22118d	Aneesh Kumar K.V	if (strncmp(name, "user.virtfs.", 12) == 0) {
88	fc22118d	Aneesh Kumar K.V	/*
89	fc22118d	Aneesh Kumar K.V	* Don't allow fetch of user.virtfs namesapce
90	fc22118d	Aneesh Kumar K.V	* in case of mapped security
91	fc22118d	Aneesh Kumar K.V	*/
92	fc22118d	Aneesh Kumar K.V	errno = EACCES;
93	fc22118d	Aneesh Kumar K.V	return -1;
94	fc22118d	Aneesh Kumar K.V	}
95	faa44e3d	Venkateswararao Jujjuri (JV)	return lremovexattr(rpath(ctx, path, buffer), name);
96	fc22118d	Aneesh Kumar K.V	}
97	fc22118d	Aneesh Kumar K.V
98	fc22118d	Aneesh Kumar K.V	XattrOperations mapped_user_xattr = {
99	fc22118d	Aneesh Kumar K.V	.name = "user.",
100	fc22118d	Aneesh Kumar K.V	.getxattr = mp_user_getxattr,
101	fc22118d	Aneesh Kumar K.V	.setxattr = mp_user_setxattr,
102	fc22118d	Aneesh Kumar K.V	.listxattr = mp_user_listxattr,
103	fc22118d	Aneesh Kumar K.V	.removexattr = mp_user_removexattr,
104	fc22118d	Aneesh Kumar K.V	};
105	fc22118d	Aneesh Kumar K.V
106	fc22118d	Aneesh Kumar K.V	XattrOperations passthrough_user_xattr = {
107	fc22118d	Aneesh Kumar K.V	.name = "user.",
108	fc22118d	Aneesh Kumar K.V	.getxattr = pt_getxattr,
109	fc22118d	Aneesh Kumar K.V	.setxattr = pt_setxattr,
110	fc22118d	Aneesh Kumar K.V	.listxattr = pt_listxattr,
111	fc22118d	Aneesh Kumar K.V	.removexattr = pt_removexattr,
112	fc22118d	Aneesh Kumar K.V	};

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