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 */