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;
30 static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
31 static int (*gpfs_set_lease_fn)(int fd, unsigned int leaseType);
32 static int (*gpfs_getacl_fn)(char *pathname, int flags, void *acl);
33 static int (*gpfs_putacl_fn)(char *pathname, int flags, void *acl);
34 static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
38 bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
41 unsigned int allow = GPFS_SHARE_NONE;
42 unsigned int deny = GPFS_DENY_NONE;
45 if (!gpfs_share_modes) {
49 if (gpfs_set_share_fn == NULL) {
53 if ((fsp == NULL) || (fsp->fh == NULL) || (fsp->fh->fd < 0)) {
54 /* No real file, don't disturb */
58 allow |= (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA|
59 DELETE_ACCESS)) ? GPFS_SHARE_WRITE : 0;
60 allow |= (access_mask & (FILE_READ_DATA|FILE_EXECUTE)) ?
63 if (allow == GPFS_SHARE_NONE) {
64 DEBUG(10, ("special case am=no_access:%x\n",access_mask));
67 deny |= (share_access & FILE_SHARE_WRITE) ?
69 deny |= (share_access & (FILE_SHARE_READ)) ?
72 DEBUG(10, ("am=%x, allow=%d, sa=%x, deny=%d\n",
73 access_mask, allow, share_access, deny));
75 result = gpfs_set_share_fn(fsp->fh->fd, allow, deny);
77 if (errno == ENOSYS) {
78 DEBUG(5, ("VFS module vfs_gpfs loaded, but no gpfs "
79 "support has been compiled into Samba. Allowing access\n"));
82 DEBUG(10, ("gpfs_set_share failed: %s\n",
90 int set_gpfs_lease(int fd, int leasetype)
92 int gpfs_type = GPFS_LEASE_NONE;
98 if (gpfs_set_lease_fn == NULL) {
103 if (leasetype == F_RDLCK) {
104 gpfs_type = GPFS_LEASE_READ;
106 if (leasetype == F_WRLCK) {
107 gpfs_type = GPFS_LEASE_WRITE;
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
115 linux_set_lease_capability();
116 return gpfs_set_lease_fn(fd, gpfs_type);
119 int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
121 if (gpfs_getacl_fn == NULL) {
126 return gpfs_getacl_fn(pathname, flags, acl);
129 int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
131 if (gpfs_putacl_fn == NULL) {
136 return gpfs_putacl_fn(pathname, flags, acl);
139 int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
142 if (gpfs_get_realfilename_path_fn == NULL) {
147 return gpfs_get_realfilename_path_fn(pathname, filenamep, buflen);
150 static bool init_gpfs_function_lib(void *plibhandle_pointer,
152 void *pfn_pointer, const char *fn_name)
154 bool did_open_here = false;
155 void **libhandle_pointer = (void **)plibhandle_pointer;
156 void **fn_pointer = (void **)pfn_pointer;
158 DEBUG(10, ("trying to load name %s from %s\n",
161 if (*libhandle_pointer == NULL) {
162 *libhandle_pointer = dlopen(libname, RTLD_LAZY);
163 did_open_here = true;
165 if (*libhandle_pointer == NULL) {
166 DEBUG(10, ("Could not open lib %s\n", libname));
170 *fn_pointer = dlsym(*libhandle_pointer, fn_name);
171 if (*fn_pointer == NULL) {
172 DEBUG(10, ("Did not find symbol %s in lib %s\n",
175 dlclose(*libhandle_pointer);
176 *libhandle_pointer = NULL;
184 static bool init_gpfs_function(void *fn_pointer, const char *fn_name)
186 static void *libgpfs_handle = NULL;
187 static void *libgpfs_gpl_handle = NULL;
189 if (init_gpfs_function_lib(&libgpfs_handle, "libgpfs.so",
190 fn_pointer, fn_name)) {
193 if (init_gpfs_function_lib(&libgpfs_gpl_handle, "libgpfs_gpl.so",
194 fn_pointer, fn_name)) {
202 init_gpfs_function(&gpfs_set_share_fn, "gpfs_set_share");
203 init_gpfs_function(&gpfs_set_lease_fn, "gpfs_set_lease");
204 init_gpfs_function(&gpfs_getacl_fn, "gpfs_getacl");
205 init_gpfs_function(&gpfs_putacl_fn, "gpfs_putacl");
206 init_gpfs_function(&gpfs_get_realfilename_path_fn,
207 "gpfs_get_realfilename_path");
209 gpfs_share_modes = lp_parm_bool(-1, "gpfs", "sharemodes", True);
210 gpfs_leases = lp_parm_bool(-1, "gpfs", "leases", True);
217 int set_gpfs_lease(int snum, int leasetype)
219 DEBUG(0, ("'VFS module smbgpfs loaded, without gpfs support compiled\n"));
221 /* We need to indicate that no GPFS is around by returning ENOSYS, so
222 * that the normal linux kernel oplock code is called. */
227 bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
230 DEBUG(0, ("VFS module - smbgpfs.so loaded, without gpfs support compiled\n"));
231 /* Don't disturb but complain */
235 int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
241 int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
247 int smbd_gpfs_get_realfilename_path(char *pathname, char *fileamep,
259 #endif /* HAVE_GPFS */