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 void *libgpfs_handle = NULL;
28 static bool gpfs_share_modes;
29 static bool gpfs_leases;
31 static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
32 static int (*gpfs_set_lease_fn)(int fd, unsigned int leaseType);
33 static int (*gpfs_getacl_fn)(char *pathname, int flags, void *acl);
34 static int (*gpfs_putacl_fn)(char *pathname, int flags, void *acl);
37 bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
40 unsigned int allow = GPFS_SHARE_NONE;
41 unsigned int deny = GPFS_DENY_NONE;
44 if (!gpfs_share_modes) {
48 if (gpfs_set_share_fn == NULL) {
52 if ((fsp == NULL) || (fsp->fh == NULL) || (fsp->fh->fd < 0)) {
53 /* No real file, don't disturb */
57 allow |= (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA|
58 DELETE_ACCESS)) ? GPFS_SHARE_WRITE : 0;
59 allow |= (access_mask & (FILE_READ_DATA|FILE_EXECUTE)) ?
62 if (allow == GPFS_SHARE_NONE) {
63 DEBUG(10, ("special case am=no_access:%x\n",access_mask));
66 deny |= (share_access & FILE_SHARE_WRITE) ?
68 deny |= (share_access & (FILE_SHARE_READ)) ?
71 DEBUG(10, ("am=%x, allow=%d, sa=%x, deny=%d\n",
72 access_mask, allow, share_access, deny));
74 result = gpfs_set_share_fn(fsp->fh->fd, allow, deny);
76 if (errno == ENOSYS) {
77 DEBUG(5, ("VFS module vfs_gpfs loaded, but no gpfs "
78 "support has been compiled into Samba. Allowing access\n"));
81 DEBUG(10, ("gpfs_set_share failed: %s\n",
89 int set_gpfs_lease(int fd, int leasetype)
91 int gpfs_type = GPFS_LEASE_NONE;
97 if (gpfs_set_lease_fn == NULL) {
102 if (leasetype == F_RDLCK) {
103 gpfs_type = GPFS_LEASE_READ;
105 if (leasetype == F_WRLCK) {
106 gpfs_type = GPFS_LEASE_WRITE;
109 /* we unconditionally set CAP_LEASE, rather than looking for
110 -1/EACCES as there is a bug in some versions of
111 libgpfs_gpl.so which results in a leaked fd on /dev/ss0
112 each time we try this with the wrong capabilities set
114 linux_set_lease_capability();
115 return gpfs_set_lease_fn(fd, gpfs_type);
118 int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
120 if (gpfs_getacl_fn == NULL) {
125 return gpfs_getacl_fn(pathname, flags, acl);
128 int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
130 if (gpfs_putacl_fn == NULL) {
135 return gpfs_putacl_fn(pathname, flags, acl);
140 if (libgpfs_handle != NULL) {
144 libgpfs_handle = sys_dlopen("libgpfs_gpl.so", RTLD_LAZY);
146 if (libgpfs_handle == NULL) {
147 DEBUG(10, ("sys_dlopen for libgpfs_gpl failed: %s\n",
152 DEBUG(10, ("libgpfs_gpl.so loaded\n"));
154 gpfs_set_share_fn = sys_dlsym(libgpfs_handle, "gpfs_set_share");
155 if (gpfs_set_share_fn == NULL) {
156 DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
157 "'gpfs_set_share'\n"));
161 gpfs_set_lease_fn = sys_dlsym(libgpfs_handle, "gpfs_set_lease");
162 if (gpfs_set_lease_fn == NULL) {
163 DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
164 "'gpfs_set_lease'\n"));
165 sys_dlclose(libgpfs_handle);
170 gpfs_getacl_fn = sys_dlsym(libgpfs_handle, "gpfs_getacl");
171 if (gpfs_getacl_fn == NULL) {
172 DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
177 gpfs_putacl_fn = sys_dlsym(libgpfs_handle, "gpfs_putacl");
178 if (gpfs_putacl_fn == NULL) {
179 DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
184 gpfs_share_modes = lp_parm_bool(-1, "gpfs", "sharemodes", True);
185 gpfs_leases = lp_parm_bool(-1, "gpfs", "leases", True);
190 sys_dlclose(libgpfs_handle);
191 /* leave libgpfs_handle != NULL around, no point
193 gpfs_set_share_fn = NULL;
194 gpfs_set_lease_fn = NULL;
195 gpfs_getacl_fn = NULL;
196 gpfs_putacl_fn = NULL;
201 int set_gpfs_lease(int snum, int leasetype)
203 DEBUG(0, ("'VFS module smbgpfs loaded, without gpfs support compiled\n"));
205 /* We need to indicate that no GPFS is around by returning ENOSYS, so
206 * that the normal linux kernel oplock code is called. */
211 bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
214 DEBUG(0, ("VFS module - smbgpfs.so loaded, without gpfs support compiled\n"));
215 /* Don't disturb but complain */
219 int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
225 int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
236 #endif /* HAVE_GPFS */