2 * Unix SMB/CIFS implementation.
3 * Provide a connection to GPFS specific features
4 * Copyright (C) Volker Lendecke 2005
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.
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.
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/>.
27 static bool gpfs_share_modes;
28 static bool gpfs_leases;
29 static bool gpfs_getrealfilename;
30 static bool gpfs_winattr;
31 static bool gpfs_do_ftruncate;
33 static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
34 static int (*gpfs_set_lease_fn)(int fd, unsigned int leaseType);
35 static int (*gpfs_getacl_fn)(char *pathname, int flags, void *acl);
36 static int (*gpfs_putacl_fn)(char *pathname, int flags, void *acl);
37 static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
39 static int (*gpfs_set_winattrs_path_fn)(char *pathname, int flags, struct gpfs_winattr *attrs);
40 static int (*gpfs_get_winattrs_path_fn)(char *pathname, struct gpfs_winattr *attrs);
41 static int (*gpfs_get_winattrs_fn)(int fd, struct gpfs_winattr *attrs);
42 static int (*gpfs_ftruncate_fn)(int fd, gpfs_off64_t length);
45 bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
48 unsigned int allow = GPFS_SHARE_NONE;
49 unsigned int deny = GPFS_DENY_NONE;
52 if (!gpfs_share_modes) {
56 if (gpfs_set_share_fn == NULL) {
60 if ((fsp == NULL) || (fsp->fh == NULL) || (fsp->fh->fd < 0)) {
61 /* No real file, don't disturb */
65 allow |= (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA|
66 DELETE_ACCESS)) ? GPFS_SHARE_WRITE : 0;
67 allow |= (access_mask & (FILE_READ_DATA|FILE_EXECUTE)) ?
70 if (allow == GPFS_SHARE_NONE) {
71 DEBUG(10, ("special case am=no_access:%x\n",access_mask));
74 deny |= (share_access & FILE_SHARE_WRITE) ?
76 deny |= (share_access & (FILE_SHARE_READ)) ?
79 DEBUG(10, ("am=%x, allow=%d, sa=%x, deny=%d\n",
80 access_mask, allow, share_access, deny));
82 result = gpfs_set_share_fn(fsp->fh->fd, allow, deny);
84 if (errno == ENOSYS) {
85 DEBUG(5, ("VFS module vfs_gpfs loaded, but no gpfs "
86 "support has been compiled into Samba. Allowing access\n"));
89 DEBUG(10, ("gpfs_set_share failed: %s\n",
97 int set_gpfs_lease(int fd, int leasetype)
99 int gpfs_type = GPFS_LEASE_NONE;
105 if (gpfs_set_lease_fn == NULL) {
110 if (leasetype == F_RDLCK) {
111 gpfs_type = GPFS_LEASE_READ;
113 if (leasetype == F_WRLCK) {
114 gpfs_type = GPFS_LEASE_WRITE;
117 /* we unconditionally set CAP_LEASE, rather than looking for
118 -1/EACCES as there is a bug in some versions of
119 libgpfs_gpl.so which results in a leaked fd on /dev/ss0
120 each time we try this with the wrong capabilities set
122 linux_set_lease_capability();
123 return gpfs_set_lease_fn(fd, gpfs_type);
126 int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
128 if (gpfs_getacl_fn == NULL) {
133 return gpfs_getacl_fn(pathname, flags, acl);
136 int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
138 if (gpfs_putacl_fn == NULL) {
143 return gpfs_putacl_fn(pathname, flags, acl);
146 int smbd_gpfs_ftrunctate(int fd, gpfs_off64_t length)
148 if (!gpfs_do_ftruncate || (gpfs_ftruncate_fn == NULL)) {
153 return gpfs_ftruncate_fn(fd, length);
156 int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
159 if ((!gpfs_getrealfilename)
160 || (gpfs_get_realfilename_path_fn == NULL)) {
165 return gpfs_get_realfilename_path_fn(pathname, filenamep, buflen);
168 int get_gpfs_winattrs(char *pathname,struct gpfs_winattr *attrs)
171 if ((!gpfs_winattr) || (gpfs_get_winattrs_path_fn == NULL)) {
175 DEBUG(10, ("gpfs_get_winattrs_path:open call %s\n",pathname));
176 return gpfs_get_winattrs_path_fn(pathname, attrs);
179 int smbd_fget_gpfs_winattrs(int fd, struct gpfs_winattr *attrs)
182 if ((!gpfs_winattr) || (gpfs_get_winattrs_fn == NULL)) {
186 DEBUG(10, ("gpfs_get_winattrs_path:open call %d\n", fd));
187 return gpfs_get_winattrs_fn(fd, attrs);
190 int set_gpfs_winattrs(char *pathname,int flags,struct gpfs_winattr *attrs)
192 if ((!gpfs_winattr) || (gpfs_set_winattrs_path_fn == NULL)) {
197 DEBUG(10, ("gpfs_set_winattrs_path:open call %s\n",pathname));
198 return gpfs_set_winattrs_path_fn(pathname,flags, attrs);
201 static bool init_gpfs_function_lib(void *plibhandle_pointer,
203 void *pfn_pointer, const char *fn_name)
205 bool did_open_here = false;
206 void **libhandle_pointer = (void **)plibhandle_pointer;
207 void **fn_pointer = (void **)pfn_pointer;
209 DEBUG(10, ("trying to load name %s from %s\n",
212 if (*libhandle_pointer == NULL) {
213 *libhandle_pointer = dlopen(libname, RTLD_LAZY);
214 did_open_here = true;
216 if (*libhandle_pointer == NULL) {
217 DEBUG(10, ("Could not open lib %s\n", libname));
221 *fn_pointer = dlsym(*libhandle_pointer, fn_name);
222 if (*fn_pointer == NULL) {
223 DEBUG(10, ("Did not find symbol %s in lib %s\n",
226 dlclose(*libhandle_pointer);
227 *libhandle_pointer = NULL;
235 static bool init_gpfs_function(void *fn_pointer, const char *fn_name)
237 static void *libgpfs_handle = NULL;
238 static void *libgpfs_gpl_handle = NULL;
240 if (init_gpfs_function_lib(&libgpfs_handle, "libgpfs.so",
241 fn_pointer, fn_name)) {
244 if (init_gpfs_function_lib(&libgpfs_gpl_handle, "libgpfs_gpl.so",
245 fn_pointer, fn_name)) {
253 init_gpfs_function(&gpfs_set_share_fn, "gpfs_set_share");
254 init_gpfs_function(&gpfs_set_lease_fn, "gpfs_set_lease");
255 init_gpfs_function(&gpfs_getacl_fn, "gpfs_getacl");
256 init_gpfs_function(&gpfs_putacl_fn, "gpfs_putacl");
257 init_gpfs_function(&gpfs_get_realfilename_path_fn,
258 "gpfs_get_realfilename_path");
259 init_gpfs_function(&gpfs_get_winattrs_path_fn,"gpfs_get_winattrs_path");
260 init_gpfs_function(&gpfs_set_winattrs_path_fn,"gpfs_set_winattrs_path");
261 init_gpfs_function(&gpfs_get_winattrs_fn,"gpfs_get_winattrs");
263 init_gpfs_function(&gpfs_ftruncate_fn,"gpfs_ftruncate");
265 gpfs_share_modes = lp_parm_bool(-1, "gpfs", "sharemodes", True);
266 gpfs_leases = lp_parm_bool(-1, "gpfs", "leases", True);
267 gpfs_getrealfilename = lp_parm_bool(-1, "gpfs", "getrealfilename",
269 gpfs_winattr = lp_parm_bool(-1, "gpfs", "winattr", False);
270 gpfs_do_ftruncate = lp_parm_bool(-1, "gpfs", "ftruncate", True);
277 int set_gpfs_lease(int snum, int leasetype)
279 DEBUG(0, ("'VFS module smbgpfs loaded, without gpfs support compiled\n"));
281 /* We need to indicate that no GPFS is around by returning ENOSYS, so
282 * that the normal linux kernel oplock code is called. */
287 bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
290 DEBUG(0, ("VFS module - smbgpfs.so loaded, without gpfs support compiled\n"));
291 /* Don't disturb but complain */
295 int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
301 int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
307 int smbd_gpfs_get_realfilename_path(char *pathname, char *fileamep,
314 int set_gpfs_winattrs(char *pathname,int flags,struct gpfs_winattr *attrs)
320 int get_gpfs_winattrs(char *pathname,struct gpfs_winattr *attrs)
331 #endif /* HAVE_GPFS */