mirror of
https://github.com/samba-team/samba.git
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de0f3b657d
Signed-off-by: Christian Ambach <christian.ambach@de.ibm.com>
318 lines
8.2 KiB
C
318 lines
8.2 KiB
C
/*
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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 3 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, see <http://www.gnu.org/licenses/>.
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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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#include "vfs_gpfs.h"
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static bool gpfs_share_modes;
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static bool gpfs_leases;
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static bool gpfs_getrealfilename;
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static bool gpfs_winattr;
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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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static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
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int *buflen);
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static int (*gpfs_set_winattrs_path_fn)(char *pathname, int flags, struct gpfs_winattr *attrs);
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static int (*gpfs_get_winattrs_path_fn)(char *pathname, struct gpfs_winattr *attrs);
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static int (*gpfs_get_winattrs_fn)(int fd, struct gpfs_winattr *attrs);
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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_share_modes) {
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return True;
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}
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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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if (allow == GPFS_SHARE_NONE) {
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DEBUG(10, ("special case am=no_access:%x\n",access_mask));
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}
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else {
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deny |= (share_access & FILE_SHARE_WRITE) ?
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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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}
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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_leases) {
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return True;
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}
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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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/* we unconditionally set CAP_LEASE, rather than looking for
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-1/EACCES as there is a bug in some versions of
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libgpfs_gpl.so which results in a leaked fd on /dev/ss0
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each time we try this with the wrong capabilities set
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*/
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linux_set_lease_capability();
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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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int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
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int *buflen)
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{
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if ((!gpfs_getrealfilename)
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|| (gpfs_get_realfilename_path_fn == NULL)) {
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errno = ENOSYS;
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return -1;
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}
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return gpfs_get_realfilename_path_fn(pathname, filenamep, buflen);
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}
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int get_gpfs_winattrs(char *pathname,struct gpfs_winattr *attrs)
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{
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if ((!gpfs_winattr) || (gpfs_get_winattrs_path_fn == NULL)) {
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errno = ENOSYS;
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return -1;
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}
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DEBUG(10, ("gpfs_get_winattrs_path:open call %s\n",pathname));
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return gpfs_get_winattrs_path_fn(pathname, attrs);
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}
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int smbd_fget_gpfs_winattrs(int fd, struct gpfs_winattr *attrs)
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{
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if ((!gpfs_winattr) || (gpfs_get_winattrs_fn == NULL)) {
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errno = ENOSYS;
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return -1;
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}
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DEBUG(10, ("gpfs_get_winattrs_path:open call %d\n", fd));
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return gpfs_get_winattrs_fn(fd, attrs);
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}
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int set_gpfs_winattrs(char *pathname,int flags,struct gpfs_winattr *attrs)
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{
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if ((!gpfs_winattr) || (gpfs_set_winattrs_path_fn == NULL)) {
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errno = ENOSYS;
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return -1;
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}
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DEBUG(10, ("gpfs_set_winattrs_path:open call %s\n",pathname));
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return gpfs_set_winattrs_path_fn(pathname,flags, attrs);
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}
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static bool init_gpfs_function_lib(void *plibhandle_pointer,
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const char *libname,
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void *pfn_pointer, const char *fn_name)
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{
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bool did_open_here = false;
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void **libhandle_pointer = (void **)plibhandle_pointer;
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void **fn_pointer = (void **)pfn_pointer;
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DEBUG(10, ("trying to load name %s from %s\n",
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fn_name, libname));
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if (*libhandle_pointer == NULL) {
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*libhandle_pointer = dlopen(libname, RTLD_LAZY);
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did_open_here = true;
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}
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if (*libhandle_pointer == NULL) {
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DEBUG(10, ("Could not open lib %s\n", libname));
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return false;
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}
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*fn_pointer = dlsym(*libhandle_pointer, fn_name);
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if (*fn_pointer == NULL) {
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DEBUG(10, ("Did not find symbol %s in lib %s\n",
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fn_name, libname));
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if (did_open_here) {
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dlclose(*libhandle_pointer);
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*libhandle_pointer = NULL;
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}
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return false;
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}
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return true;
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}
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static bool init_gpfs_function(void *fn_pointer, const char *fn_name)
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{
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static void *libgpfs_handle = NULL;
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static void *libgpfs_gpl_handle = NULL;
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if (init_gpfs_function_lib(&libgpfs_handle, "libgpfs.so",
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fn_pointer, fn_name)) {
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return true;
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}
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if (init_gpfs_function_lib(&libgpfs_gpl_handle, "libgpfs_gpl.so",
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fn_pointer, fn_name)) {
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return true;
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}
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return false;
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}
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void init_gpfs(void)
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{
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init_gpfs_function(&gpfs_set_share_fn, "gpfs_set_share");
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init_gpfs_function(&gpfs_set_lease_fn, "gpfs_set_lease");
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init_gpfs_function(&gpfs_getacl_fn, "gpfs_getacl");
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init_gpfs_function(&gpfs_putacl_fn, "gpfs_putacl");
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init_gpfs_function(&gpfs_get_realfilename_path_fn,
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"gpfs_get_realfilename_path");
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init_gpfs_function(&gpfs_get_winattrs_path_fn,"gpfs_get_winattrs_path");
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init_gpfs_function(&gpfs_set_winattrs_path_fn,"gpfs_set_winattrs_path");
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init_gpfs_function(&gpfs_get_winattrs_fn,"gpfs_get_winattrs");
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gpfs_share_modes = lp_parm_bool(-1, "gpfs", "sharemodes", True);
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gpfs_leases = lp_parm_bool(-1, "gpfs", "leases", True);
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gpfs_getrealfilename = lp_parm_bool(-1, "gpfs", "getrealfilename",
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True);
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gpfs_winattr = lp_parm_bool(-1, "gpfs", "winattr", False);
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return;
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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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int smbd_gpfs_get_realfilename_path(char *pathname, char *fileamep,
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int *buflen)
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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 set_gpfs_winattrs(char *pathname,int flags,struct gpfs_winattr *attrs)
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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 get_gpfs_winattrs(char *pathname,struct gpfs_winattr *attrs)
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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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