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authorJim McDonough <jmcd@samba.org>2006-11-09 20:29:31 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 12:15:43 -0500
commit0620658890fa9c68a9848538728023192319c81a (patch)
tree22cdd87983c019addb51b61a20ba50627c6f6567 /source/modules/gpfs.c
parent4ec896cdbe441b17d91895a50ac9be61efe2f9c1 (diff)
downloadsamba-0620658890fa9c68a9848538728023192319c81a.tar.gz
r19647: Add some GPFS support in a vfs mod. Also adds the kernel flock op to
the vfs layer, since gpfs supports it. Thanks to Volker, Christian, Mathias, Chetan, and Peter.
Diffstat (limited to 'source/modules/gpfs.c')
-rw-r--r--source/modules/gpfs.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/source/modules/gpfs.c b/source/modules/gpfs.c
new file mode 100644
index 00000000000..f63a85294b8
--- /dev/null
+++ b/source/modules/gpfs.c
@@ -0,0 +1,231 @@
+/*
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+
+#ifdef HAVE_GPFS
+
+#include "gpfs_gpl.h"
+
+static void *libgpfs_handle = NULL;
+
+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_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;
+ deny |= (share_access & (FILE_SHARE_WRITE|FILE_SHARE_DELETE)) ?
+ 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_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;
+ }
+ 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);
+}
+
+void init_gpfs(void)
+{
+ if (libgpfs_handle != NULL) {
+ return;
+ }
+
+ libgpfs_handle = sys_dlopen("libgpfs_gpl.so", RTLD_LAZY);
+
+ if (libgpfs_handle == NULL) {
+ DEBUG(10, ("sys_dlopen for libgpfs_gpl failed: %s\n",
+ strerror(errno)));
+ return;
+ }
+
+ DEBUG(10, ("libgpfs_gpl.so loaded\n"));
+
+ gpfs_set_share_fn = sys_dlsym(libgpfs_handle, "gpfs_set_share");
+ if (gpfs_set_share_fn == NULL) {
+ DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
+ "'gpfs_set_share'\n"));
+ sys_dlclose(libgpfs_handle);
+
+ /* leave libgpfs_handle != NULL around, no point
+ in trying twice */
+ gpfs_set_share_fn = NULL;
+ gpfs_set_lease_fn = NULL;
+ gpfs_getacl_fn = NULL;
+ gpfs_putacl_fn = NULL;
+ return;
+ }
+
+ gpfs_set_lease_fn = sys_dlsym(libgpfs_handle, "gpfs_set_lease");
+ if (gpfs_set_lease_fn == NULL) {
+ DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
+ "'gpfs_set_lease'\n"));
+ sys_dlclose(libgpfs_handle);
+
+ /* leave libgpfs_handle != NULL around, no point
+ in trying twice */
+ gpfs_set_share_fn = NULL;
+ gpfs_set_lease_fn = NULL;
+ gpfs_getacl_fn = NULL;
+ gpfs_putacl_fn = NULL;
+ return;
+ }
+
+ gpfs_getacl_fn = sys_dlsym(libgpfs_handle, "gpfs_getacl");
+ if (gpfs_getacl_fn == NULL) {
+ DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
+ "'gpfs_getacl'\n"));
+ sys_dlclose(libgpfs_handle);
+
+ /* leave libgpfs_handle != NULL around, no point
+ in trying twice */
+ gpfs_set_share_fn = NULL;
+ gpfs_set_lease_fn = NULL;
+ gpfs_getacl_fn = NULL;
+ gpfs_putacl_fn = NULL;
+ return;
+ }
+
+ gpfs_putacl_fn = sys_dlsym(libgpfs_handle, "gpfs_putacl");
+ if (gpfs_putacl_fn == NULL) {
+ DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
+ "'gpfs_putacl'\n"));
+ sys_dlclose(libgpfs_handle);
+
+ /* leave libgpfs_handle != NULL around, no point
+ in trying twice */
+ gpfs_set_share_fn = NULL;
+ gpfs_set_lease_fn = NULL;
+ gpfs_getacl_fn = NULL;
+ gpfs_putacl_fn = NULL;
+ 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 */