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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.
(This used to be commit 0620658890)
This commit is contained in:
Jim McDonough
committed by
Gerald (Jerry) Carter
Gerald (Jerry) Carter
parent
e513fb27d6
commit
4fe70bcee2
231
source3/modules/gpfs.c
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231
source3/modules/gpfs.c
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@@ -0,0 +1,231 @@
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/*
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* Unix SMB/CIFS implementation.
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* Provide a connection to GPFS specific features
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* Copyright (C) Volker Lendecke 2005
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#ifdef HAVE_GPFS
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#include "gpfs_gpl.h"
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static void *libgpfs_handle = NULL;
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static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
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static int (*gpfs_set_lease_fn)(int fd, unsigned int leaseType);
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static int (*gpfs_getacl_fn)(char *pathname, int flags, void *acl);
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static int (*gpfs_putacl_fn)(char *pathname, int flags, void *acl);
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BOOL set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
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uint32 share_access)
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{
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unsigned int allow = GPFS_SHARE_NONE;
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unsigned int deny = GPFS_DENY_NONE;
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int result;
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if (gpfs_set_share_fn == NULL) {
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return False;
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}
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if ((fsp == NULL) || (fsp->fh == NULL) || (fsp->fh->fd < 0)) {
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/* No real file, don't disturb */
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return True;
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}
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allow |= (access_mask & (FILE_WRITE_DATA|FILE_APPEND_DATA|
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DELETE_ACCESS)) ? GPFS_SHARE_WRITE : 0;
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allow |= (access_mask & (FILE_READ_DATA|FILE_EXECUTE)) ?
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GPFS_SHARE_READ : 0;
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deny |= (share_access & (FILE_SHARE_WRITE|FILE_SHARE_DELETE)) ?
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0 : GPFS_DENY_WRITE;
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deny |= (share_access & (FILE_SHARE_READ)) ?
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0 : GPFS_DENY_READ;
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DEBUG(10, ("am=%x, allow=%d, sa=%x, deny=%d\n",
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access_mask, allow, share_access, deny));
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result = gpfs_set_share_fn(fsp->fh->fd, allow, deny);
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if (result != 0) {
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if (errno == ENOSYS) {
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DEBUG(5, ("VFS module vfs_gpfs loaded, but no gpfs "
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"support has been compiled into Samba. Allowing access\n"));
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return True;
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} else {
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DEBUG(10, ("gpfs_set_share failed: %s\n",
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strerror(errno)));
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}
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}
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return (result == 0);
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}
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int set_gpfs_lease(int fd, int leasetype)
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{
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int gpfs_type = GPFS_LEASE_NONE;
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if (gpfs_set_lease_fn == NULL) {
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errno = EINVAL;
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return -1;
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}
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if (leasetype == F_RDLCK) {
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gpfs_type = GPFS_LEASE_READ;
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}
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if (leasetype == F_WRLCK) {
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gpfs_type = GPFS_LEASE_WRITE;
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}
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return gpfs_set_lease_fn(fd, gpfs_type);
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}
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int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
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{
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if (gpfs_getacl_fn == NULL) {
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errno = ENOSYS;
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return -1;
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}
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return gpfs_getacl_fn(pathname, flags, acl);
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}
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int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
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{
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if (gpfs_putacl_fn == NULL) {
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errno = ENOSYS;
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return -1;
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}
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return gpfs_putacl_fn(pathname, flags, acl);
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}
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void init_gpfs(void)
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{
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if (libgpfs_handle != NULL) {
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return;
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}
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libgpfs_handle = sys_dlopen("libgpfs_gpl.so", RTLD_LAZY);
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if (libgpfs_handle == NULL) {
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DEBUG(10, ("sys_dlopen for libgpfs_gpl failed: %s\n",
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strerror(errno)));
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return;
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}
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DEBUG(10, ("libgpfs_gpl.so loaded\n"));
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gpfs_set_share_fn = sys_dlsym(libgpfs_handle, "gpfs_set_share");
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if (gpfs_set_share_fn == NULL) {
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DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
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"'gpfs_set_share'\n"));
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sys_dlclose(libgpfs_handle);
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/* leave libgpfs_handle != NULL around, no point
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in trying twice */
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gpfs_set_share_fn = NULL;
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gpfs_set_lease_fn = NULL;
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gpfs_getacl_fn = NULL;
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gpfs_putacl_fn = NULL;
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return;
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}
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gpfs_set_lease_fn = sys_dlsym(libgpfs_handle, "gpfs_set_lease");
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if (gpfs_set_lease_fn == NULL) {
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DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
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"'gpfs_set_lease'\n"));
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sys_dlclose(libgpfs_handle);
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/* leave libgpfs_handle != NULL around, no point
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in trying twice */
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gpfs_set_share_fn = NULL;
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gpfs_set_lease_fn = NULL;
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gpfs_getacl_fn = NULL;
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gpfs_putacl_fn = NULL;
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return;
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}
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gpfs_getacl_fn = sys_dlsym(libgpfs_handle, "gpfs_getacl");
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if (gpfs_getacl_fn == NULL) {
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DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
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"'gpfs_getacl'\n"));
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sys_dlclose(libgpfs_handle);
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/* leave libgpfs_handle != NULL around, no point
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in trying twice */
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gpfs_set_share_fn = NULL;
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gpfs_set_lease_fn = NULL;
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gpfs_getacl_fn = NULL;
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gpfs_putacl_fn = NULL;
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return;
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}
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gpfs_putacl_fn = sys_dlsym(libgpfs_handle, "gpfs_putacl");
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if (gpfs_putacl_fn == NULL) {
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DEBUG(3, ("libgpfs_gpl.so does not contain the symbol "
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"'gpfs_putacl'\n"));
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sys_dlclose(libgpfs_handle);
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/* leave libgpfs_handle != NULL around, no point
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in trying twice */
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gpfs_set_share_fn = NULL;
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gpfs_set_lease_fn = NULL;
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gpfs_getacl_fn = NULL;
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gpfs_putacl_fn = NULL;
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return;
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}
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}
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#else
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int set_gpfs_lease(int snum, int leasetype)
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{
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DEBUG(0, ("'VFS module smbgpfs loaded, without gpfs support compiled\n"));
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/* We need to indicate that no GPFS is around by returning ENOSYS, so
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* that the normal linux kernel oplock code is called. */
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errno = ENOSYS;
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return -1;
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}
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BOOL set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
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uint32 share_access)
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{
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DEBUG(0, ("VFS module - smbgpfs.so loaded, without gpfs support compiled\n"));
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/* Don't disturb but complain */
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return True;
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}
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int smbd_gpfs_getacl(char *pathname, int flags, void *acl)
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{
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errno = ENOSYS;
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return -1;
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}
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int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
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{
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errno = ENOSYS;
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return -1;
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}
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void init_gpfs(void)
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{
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return;
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}
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#endif /* HAVE_GPFS */
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