+++ /dev/null
-/*
- * Unix SMB/CIFS implementation.
- * Provide a connection to GPFS specific features
- * Copyright (C) Volker Lendecke 2005
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "includes.h"
-
-#ifdef HAVE_GPFS
-
-#include "gpfs_gpl.h"
-#include "vfs_gpfs.h"
-
-static bool gpfs_share_modes;
-static bool gpfs_leases;
-
-static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
-static int (*gpfs_set_lease_fn)(int fd, unsigned int leaseType);
-static int (*gpfs_getacl_fn)(char *pathname, int flags, void *acl);
-static int (*gpfs_putacl_fn)(char *pathname, int flags, void *acl);
-
-
-bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
- uint32 share_access)
-{
- unsigned int allow = GPFS_SHARE_NONE;
- unsigned int deny = GPFS_DENY_NONE;
- int result;
-
- if (!gpfs_share_modes) {
- return True;
- }
-
- if (gpfs_set_share_fn == NULL) {
- return False;
- }
-
- if ((fsp == NULL) || (fsp->fh == NULL) || (fsp->fh->fd < 0)) {
- /* No real file, don't disturb */
- return True;
- }
-
- allow |= (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA|
- DELETE_ACCESS)) ? GPFS_SHARE_WRITE : 0;
- allow |= (access_mask & (FILE_READ_DATA|FILE_EXECUTE)) ?
- GPFS_SHARE_READ : 0;
-
- if (allow == GPFS_SHARE_NONE) {
- DEBUG(10, ("special case am=no_access:%x\n",access_mask));
- }
- else {
- deny |= (share_access & FILE_SHARE_WRITE) ?
- 0 : GPFS_DENY_WRITE;
- deny |= (share_access & (FILE_SHARE_READ)) ?
- 0 : GPFS_DENY_READ;
- }
- DEBUG(10, ("am=%x, allow=%d, sa=%x, deny=%d\n",
- access_mask, allow, share_access, deny));
-
- result = gpfs_set_share_fn(fsp->fh->fd, allow, deny);
- if (result != 0) {
- if (errno == ENOSYS) {
- DEBUG(5, ("VFS module vfs_gpfs loaded, but no gpfs "
- "support has been compiled into Samba. Allowing access\n"));
- return True;
- } else {
- DEBUG(10, ("gpfs_set_share failed: %s\n",
- strerror(errno)));
- }
- }
-
- return (result == 0);
-}
-
-int set_gpfs_lease(int fd, int leasetype)
-{
- int gpfs_type = GPFS_LEASE_NONE;
-
- if (!gpfs_leases) {
- return True;
- }
-
- if (gpfs_set_lease_fn == NULL) {
- errno = EINVAL;
- return -1;
- }
-
- if (leasetype == F_RDLCK) {
- gpfs_type = GPFS_LEASE_READ;
- }
- if (leasetype == F_WRLCK) {
- gpfs_type = GPFS_LEASE_WRITE;
- }
-
- /* we unconditionally set CAP_LEASE, rather than looking for
- -1/EACCES as there is a bug in some versions of
- libgpfs_gpl.so which results in a leaked fd on /dev/ss0
- each time we try this with the wrong capabilities set
- */
- linux_set_lease_capability();
- return gpfs_set_lease_fn(fd, gpfs_type);
-}
-
-int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
-{
- if (gpfs_getacl_fn == NULL) {
- errno = ENOSYS;
- return -1;
- }
-
- return gpfs_getacl_fn(pathname, flags, acl);
-}
-
-int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
-{
- if (gpfs_putacl_fn == NULL) {
- errno = ENOSYS;
- return -1;
- }
-
- return gpfs_putacl_fn(pathname, flags, acl);
-}
-
-static bool init_gpfs_function_lib(void *plibhandle_pointer,
- const char *libname,
- void *pfn_pointer, const char *fn_name)
-{
- bool did_open_here = false;
- void **libhandle_pointer = (void **)plibhandle_pointer;
- void **fn_pointer = (void **)pfn_pointer;
-
- if (*libhandle_pointer == NULL) {
- *libhandle_pointer = dlopen(libname, RTLD_LAZY);
- did_open_here = true;
- }
- if (*libhandle_pointer == NULL) {
- DEBUG(10, ("Could not open lib %s\n", libname));
- return false;
- }
-
- *fn_pointer = dlsym(*libhandle_pointer, fn_name);
- if (*fn_pointer == NULL) {
- DEBUG(10, ("Did not find symbol %s in lib %s\n",
- fn_name, libname));
- if (did_open_here) {
- dlclose(*libhandle_pointer);
- *libhandle_pointer = NULL;
- }
- return false;
- }
-
- return true;
-}
-
-static bool init_gpfs_function(void *fn_pointer, const char *fn_name)
-{
- static void *libgpfs_handle = NULL;
- static void *libgpfs_gpl_handle = NULL;
-
- if (init_gpfs_function_lib(&libgpfs_handle, "libgpfs.so",
- fn_pointer, fn_name)) {
- return true;
- }
- if (init_gpfs_function_lib(&libgpfs_gpl_handle, "libgpfs_gpl.so",
- fn_pointer, fn_name)) {
- return true;
- }
- return false;
-}
-
-void init_gpfs(void)
-{
- init_gpfs_function(&gpfs_set_share_fn, "gpfs_set_share");
- init_gpfs_function(&gpfs_set_lease_fn, "gpfs_set_lease");
- init_gpfs_function(&gpfs_getacl_fn, "gpfs_getacl");
- init_gpfs_function(&gpfs_putacl_fn, "gpfs_putacl");
-
- gpfs_share_modes = lp_parm_bool(-1, "gpfs", "sharemodes", True);
- gpfs_leases = lp_parm_bool(-1, "gpfs", "leases", True);
-
- return;
-}
-
-#else
-
-int set_gpfs_lease(int snum, int leasetype)
-{
- DEBUG(0, ("'VFS module smbgpfs loaded, without gpfs support compiled\n"));
-
- /* We need to indicate that no GPFS is around by returning ENOSYS, so
- * that the normal linux kernel oplock code is called. */
- errno = ENOSYS;
- return -1;
-}
-
-bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
- uint32 share_access)
-{
- DEBUG(0, ("VFS module - smbgpfs.so loaded, without gpfs support compiled\n"));
- /* Don't disturb but complain */
- return True;
-}
-
-int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
-{
- errno = ENOSYS;
- return -1;
-}
-
-int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
-{
- errno = ENOSYS;
- return -1;
-}
-
-void init_gpfs(void)
-{
- return;
-}
-
-#endif /* HAVE_GPFS */
git.samba.org / samba.git / blobdiff