]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * Virtio 9p system.posix* xattr callback | |
3 | * | |
4 | * Copyright IBM, Corp. 2010 | |
5 | * | |
6 | * Authors: | |
7 | * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
10 | * the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
14 | #include <sys/types.h> | |
15 | #include "qemu-xattr.h" | |
16 | #include "hw/virtio.h" | |
17 | #include "virtio-9p.h" | |
18 | #include "fsdev/file-op-9p.h" | |
19 | #include "virtio-9p-xattr.h" | |
20 | ||
21 | #define MAP_ACL_ACCESS "user.virtfs.system.posix_acl_access" | |
22 | #define MAP_ACL_DEFAULT "user.virtfs.system.posix_acl_default" | |
23 | #define ACL_ACCESS "system.posix_acl_access" | |
24 | #define ACL_DEFAULT "system.posix_acl_default" | |
25 | ||
26 | static ssize_t mp_pacl_getxattr(FsContext *ctx, const char *path, | |
27 | const char *name, void *value, size_t size) | |
28 | { | |
29 | char buffer[PATH_MAX]; | |
30 | return lgetxattr(rpath(ctx, path, buffer), MAP_ACL_ACCESS, value, size); | |
31 | } | |
32 | ||
33 | static ssize_t mp_pacl_listxattr(FsContext *ctx, const char *path, | |
34 | char *name, void *value, size_t osize) | |
35 | { | |
36 | ssize_t len = sizeof(ACL_ACCESS); | |
37 | ||
38 | if (!value) { | |
39 | return len; | |
40 | } | |
41 | ||
42 | if (osize < len) { | |
43 | errno = ERANGE; | |
44 | return -1; | |
45 | } | |
46 | ||
47 | strncpy(value, ACL_ACCESS, len); | |
48 | return 0; | |
49 | } | |
50 | ||
51 | static int mp_pacl_setxattr(FsContext *ctx, const char *path, const char *name, | |
52 | void *value, size_t size, int flags) | |
53 | { | |
54 | char buffer[PATH_MAX]; | |
55 | return lsetxattr(rpath(ctx, path, buffer), MAP_ACL_ACCESS, value, | |
56 | size, flags); | |
57 | } | |
58 | ||
59 | static int mp_pacl_removexattr(FsContext *ctx, | |
60 | const char *path, const char *name) | |
61 | { | |
62 | int ret; | |
63 | char buffer[PATH_MAX]; | |
64 | ret = lremovexattr(rpath(ctx, path, buffer), MAP_ACL_ACCESS); | |
65 | if (ret == -1 && errno == ENODATA) { | |
66 | /* | |
67 | * We don't get ENODATA error when trying to remove a | |
68 | * posix acl that is not present. So don't throw the error | |
69 | * even in case of mapped security model | |
70 | */ | |
71 | errno = 0; | |
72 | ret = 0; | |
73 | } | |
74 | return ret; | |
75 | } | |
76 | ||
77 | static ssize_t mp_dacl_getxattr(FsContext *ctx, const char *path, | |
78 | const char *name, void *value, size_t size) | |
79 | { | |
80 | char buffer[PATH_MAX]; | |
81 | return lgetxattr(rpath(ctx, path, buffer), MAP_ACL_DEFAULT, value, size); | |
82 | } | |
83 | ||
84 | static ssize_t mp_dacl_listxattr(FsContext *ctx, const char *path, | |
85 | char *name, void *value, size_t osize) | |
86 | { | |
87 | ssize_t len = sizeof(ACL_DEFAULT); | |
88 | ||
89 | if (!value) { | |
90 | return len; | |
91 | } | |
92 | ||
93 | if (osize < len) { | |
94 | errno = ERANGE; | |
95 | return -1; | |
96 | } | |
97 | ||
98 | strncpy(value, ACL_DEFAULT, len); | |
99 | return 0; | |
100 | } | |
101 | ||
102 | static int mp_dacl_setxattr(FsContext *ctx, const char *path, const char *name, | |
103 | void *value, size_t size, int flags) | |
104 | { | |
105 | char buffer[PATH_MAX]; | |
106 | return lsetxattr(rpath(ctx, path, buffer), MAP_ACL_DEFAULT, value, | |
107 | size, flags); | |
108 | } | |
109 | ||
110 | static int mp_dacl_removexattr(FsContext *ctx, | |
111 | const char *path, const char *name) | |
112 | { | |
113 | int ret; | |
114 | char buffer[PATH_MAX]; | |
115 | ret = lremovexattr(rpath(ctx, path, buffer), MAP_ACL_DEFAULT); | |
116 | if (ret == -1 && errno == ENODATA) { | |
117 | /* | |
118 | * We don't get ENODATA error when trying to remove a | |
119 | * posix acl that is not present. So don't throw the error | |
120 | * even in case of mapped security model | |
121 | */ | |
122 | errno = 0; | |
123 | ret = 0; | |
124 | } | |
125 | return ret; | |
126 | } | |
127 | ||
128 | ||
129 | XattrOperations mapped_pacl_xattr = { | |
130 | .name = "system.posix_acl_access", | |
131 | .getxattr = mp_pacl_getxattr, | |
132 | .setxattr = mp_pacl_setxattr, | |
133 | .listxattr = mp_pacl_listxattr, | |
134 | .removexattr = mp_pacl_removexattr, | |
135 | }; | |
136 | ||
137 | XattrOperations mapped_dacl_xattr = { | |
138 | .name = "system.posix_acl_default", | |
139 | .getxattr = mp_dacl_getxattr, | |
140 | .setxattr = mp_dacl_setxattr, | |
141 | .listxattr = mp_dacl_listxattr, | |
142 | .removexattr = mp_dacl_removexattr, | |
143 | }; | |
144 | ||
145 | XattrOperations passthrough_acl_xattr = { | |
146 | .name = "system.posix_acl_", | |
147 | .getxattr = pt_getxattr, | |
148 | .setxattr = pt_setxattr, | |
149 | .listxattr = pt_listxattr, | |
150 | .removexattr = pt_removexattr, | |
151 | }; | |
152 | ||
153 | XattrOperations none_acl_xattr = { | |
154 | .name = "system.posix_acl_", | |
155 | .getxattr = notsup_getxattr, | |
156 | .setxattr = notsup_setxattr, | |
157 | .listxattr = notsup_listxattr, | |
158 | .removexattr = notsup_removexattr, | |
159 | }; |