source: trunk/server/source3/modules/gpfs.c

Last change on this file was 751, checked in by Silvan Scherrer, 13 years ago

Samba Server: updated trunk to 3.6.9
File size: 9.1 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 * Provide a connection to GPFS specific features
4 * Copyright (C) Volker Lendecke 2005
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 3 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20#include "includes.h"
21#include "system/filesys.h"
22#include "smbd/smbd.h"
23
24#ifdef HAVE_GPFS
25
26#include "libcli/security/security.h"
27#include "gpfs_gpl.h"
28#include "vfs_gpfs.h"
29
30static bool gpfs_getrealfilename;
31static bool gpfs_winattr;
32static bool gpfs_do_ftruncate;
33
34static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
35static int (*gpfs_set_lease_fn)(int fd, unsigned int leaseType);
36static int (*gpfs_getacl_fn)(char *pathname, int flags, void *acl);
37static int (*gpfs_putacl_fn)(char *pathname, int flags, void *acl);
38static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
39 int *buflen);
40static int (*gpfs_set_winattrs_path_fn)(char *pathname, int flags, struct gpfs_winattr *attrs);
41static int (*gpfs_get_winattrs_path_fn)(char *pathname, struct gpfs_winattr *attrs);
42static int (*gpfs_get_winattrs_fn)(int fd, struct gpfs_winattr *attrs);
43static int (*gpfs_ftruncate_fn)(int fd, gpfs_off64_t length);
44static int (*gpfs_lib_init_fn)(int flags);
45
46bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
47 uint32 share_access)
48{
49 unsigned int allow = GPFS_SHARE_NONE;
50 unsigned int deny = GPFS_DENY_NONE;
51 int result;
52
53 if (gpfs_set_share_fn == NULL) {
54 return False;
55 }
56
57 if ((fsp == NULL) || (fsp->fh == NULL) || (fsp->fh->fd < 0)) {
58 /* No real file, don't disturb */
59 return True;
60 }
61
62 allow |= (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA|
63 DELETE_ACCESS)) ? GPFS_SHARE_WRITE : 0;
64 allow |= (access_mask & (FILE_READ_DATA|FILE_EXECUTE)) ?
65 GPFS_SHARE_READ : 0;
66
67 if (allow == GPFS_SHARE_NONE) {
68 DEBUG(10, ("special case am=no_access:%x\n",access_mask));
69 }
70 else {
71 deny |= (share_access & FILE_SHARE_WRITE) ?
72 0 : GPFS_DENY_WRITE;
73 deny |= (share_access & (FILE_SHARE_READ)) ?
74 0 : GPFS_DENY_READ;
75 }
76 DEBUG(10, ("am=%x, allow=%d, sa=%x, deny=%d\n",
77 access_mask, allow, share_access, deny));
78
79 result = gpfs_set_share_fn(fsp->fh->fd, allow, deny);
80 if (result != 0) {
81 if (errno == ENOSYS) {
82 DEBUG(5, ("VFS module vfs_gpfs loaded, but no gpfs "
83 "support has been compiled into Samba. Allowing access\n"));
84 return True;
85 } else {
86 DEBUG(10, ("gpfs_set_share failed: %s\n",
87 strerror(errno)));
88 }
89 }
90
91 return (result == 0);
92}
93
94int set_gpfs_lease(int fd, int leasetype)
95{
96 int gpfs_type = GPFS_LEASE_NONE;
97
98 if (gpfs_set_lease_fn == NULL) {
99 errno = EINVAL;
100 return -1;
101 }
102
103 if (leasetype == F_RDLCK) {
104 gpfs_type = GPFS_LEASE_READ;
105 }
106 if (leasetype == F_WRLCK) {
107 gpfs_type = GPFS_LEASE_WRITE;
108 }
109
110 /* we unconditionally set CAP_LEASE, rather than looking for
111 -1/EACCES as there is a bug in some versions of
112 libgpfs_gpl.so which results in a leaked fd on /dev/ss0
113 each time we try this with the wrong capabilities set
114 */
115 linux_set_lease_capability();
116 return gpfs_set_lease_fn(fd, gpfs_type);
117}
118
119int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
120{
121 if (gpfs_getacl_fn == NULL) {
122 errno = ENOSYS;
123 return -1;
124 }
125
126 return gpfs_getacl_fn(pathname, flags, acl);
127}
128
129int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
130{
131 if (gpfs_putacl_fn == NULL) {
132 errno = ENOSYS;
133 return -1;
134 }
135
136 return gpfs_putacl_fn(pathname, flags, acl);
137}
138
139int smbd_gpfs_ftruncate(int fd, gpfs_off64_t length)
140{
141 if (!gpfs_do_ftruncate || (gpfs_ftruncate_fn == NULL)) {
142 errno = ENOSYS;
143 return -1;
144 }
145
146 return gpfs_ftruncate_fn(fd, length);
147}
148
149int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
150 int *buflen)
151{
152 if ((!gpfs_getrealfilename)
153 || (gpfs_get_realfilename_path_fn == NULL)) {
154 errno = ENOSYS;
155 return -1;
156 }
157
158 return gpfs_get_realfilename_path_fn(pathname, filenamep, buflen);
159}
160
161int get_gpfs_winattrs(char *pathname,struct gpfs_winattr *attrs)
162{
163
164 if ((!gpfs_winattr) || (gpfs_get_winattrs_path_fn == NULL)) {
165 errno = ENOSYS;
166 return -1;
167 }
168 DEBUG(10, ("gpfs_get_winattrs_path:open call %s\n",pathname));
169 return gpfs_get_winattrs_path_fn(pathname, attrs);
170}
171
172int smbd_fget_gpfs_winattrs(int fd, struct gpfs_winattr *attrs)
173{
174
175 if ((!gpfs_winattr) || (gpfs_get_winattrs_fn == NULL)) {
176 errno = ENOSYS;
177 return -1;
178 }
179 DEBUG(10, ("gpfs_get_winattrs_path:open call %d\n", fd));
180 return gpfs_get_winattrs_fn(fd, attrs);
181}
182
183int set_gpfs_winattrs(char *pathname,int flags,struct gpfs_winattr *attrs)
184{
185 if ((!gpfs_winattr) || (gpfs_set_winattrs_path_fn == NULL)) {
186 errno = ENOSYS;
187 return -1;
188 }
189
190 DEBUG(10, ("gpfs_set_winattrs_path:open call %s\n",pathname));
191 return gpfs_set_winattrs_path_fn(pathname,flags, attrs);
192}
193
194void smbd_gpfs_lib_init()
195{
196 if (gpfs_lib_init_fn) {
197 int rc = gpfs_lib_init_fn(0);
198 DEBUG(10, ("gpfs_lib_init() finished with rc %d "
199 "and errno %d\n", rc, errno));
200 } else {
201 DEBUG(10, ("libgpfs lacks gpfs_lib_init\n"));
202 }
203}
204
205static bool init_gpfs_function_lib(void *plibhandle_pointer,
206 const char *libname,
207 void *pfn_pointer, const char *fn_name)
208{
209 bool did_open_here = false;
210 void **libhandle_pointer = (void **)plibhandle_pointer;
211 void **fn_pointer = (void **)pfn_pointer;
212
213 DEBUG(10, ("trying to load name %s from %s\n",
214 fn_name, libname));
215
216 if (*libhandle_pointer == NULL) {
217 *libhandle_pointer = dlopen(libname, RTLD_LAZY);
218 did_open_here = true;
219 }
220 if (*libhandle_pointer == NULL) {
221 DEBUG(10, ("Could not open lib %s\n", libname));
222 return false;
223 }
224
225 *fn_pointer = dlsym(*libhandle_pointer, fn_name);
226 if (*fn_pointer == NULL) {
227 DEBUG(10, ("Did not find symbol %s in lib %s\n",
228 fn_name, libname));
229 if (did_open_here) {
230 dlclose(*libhandle_pointer);
231 *libhandle_pointer = NULL;
232 }
233 return false;
234 }
235
236 return true;
237}
238
239static bool init_gpfs_function(void *fn_pointer, const char *fn_name)
240{
241 static void *libgpfs_handle = NULL;
242 static void *libgpfs_gpl_handle = NULL;
243
244 if (init_gpfs_function_lib(&libgpfs_handle, "libgpfs.so",
245 fn_pointer, fn_name)) {
246 return true;
247 }
248 if (init_gpfs_function_lib(&libgpfs_gpl_handle, "libgpfs_gpl.so",
249 fn_pointer, fn_name)) {
250 return true;
251 }
252 return false;
253}
254
255void init_gpfs(void)
256{
257 init_gpfs_function(&gpfs_set_share_fn, "gpfs_set_share");
258 init_gpfs_function(&gpfs_set_lease_fn, "gpfs_set_lease");
259 init_gpfs_function(&gpfs_getacl_fn, "gpfs_getacl");
260 init_gpfs_function(&gpfs_putacl_fn, "gpfs_putacl");
261 init_gpfs_function(&gpfs_get_realfilename_path_fn,
262 "gpfs_get_realfilename_path");
263 init_gpfs_function(&gpfs_get_winattrs_path_fn,"gpfs_get_winattrs_path");
264 init_gpfs_function(&gpfs_set_winattrs_path_fn,"gpfs_set_winattrs_path");
265 init_gpfs_function(&gpfs_get_winattrs_fn,"gpfs_get_winattrs");
266 init_gpfs_function(&gpfs_ftruncate_fn, "gpfs_ftruncate");
267 init_gpfs_function(&gpfs_lib_init_fn,"gpfs_lib_init");
268
269 gpfs_getrealfilename = lp_parm_bool(-1, "gpfs", "getrealfilename",
270 True);
271 gpfs_winattr = lp_parm_bool(-1, "gpfs", "winattr", False);
272 gpfs_do_ftruncate = lp_parm_bool(-1, "gpfs", "ftruncate", True);
273
274 return;
275}
276
277#else
278
279int set_gpfs_lease(int snum, int leasetype)
280{
281 DEBUG(0, ("'VFS module smbgpfs loaded, without gpfs support compiled\n"));
282
283 /* We need to indicate that no GPFS is around by returning ENOSYS, so
284 * that the normal linux kernel oplock code is called. */
285 errno = ENOSYS;
286 return -1;
287}
288
289bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
290 uint32 share_access)
291{
292 DEBUG(0, ("VFS module - smbgpfs.so loaded, without gpfs support compiled\n"));
293 /* Don't disturb but complain */
294 return True;
295}
296
297int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
298{
299 errno = ENOSYS;
300 return -1;
301}
302
303int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
304{
305 errno = ENOSYS;
306 return -1;
307}
308
309int smbd_gpfs_get_realfilename_path(char *pathname, char *fileamep,
310 int *buflen)
311{
312 errno = ENOSYS;
313 return -1;
314}
315
316int set_gpfs_winattrs(char *pathname,int flags,struct gpfs_winattr *attrs)
317{
318 errno = ENOSYS;
319 return -1;
320}
321
322int get_gpfs_winattrs(char *pathname,struct gpfs_winattr *attrs)
323{
324 errno = ENOSYS;
325 return -1;
326}
327
328void smbd_gpfs_lib_init()
329{
330 return;
331}
332
333void init_gpfs(void)
334{
335 return;
336}
337
338#endif /* HAVE_GPFS */
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