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samba-mirror/source3/modules/gpfs.c
Michael Adam e7c683ba69 s3:vfs:gpfs: remove extra empty lines.
Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Jul 10 02:50:44 CEST 2014 on sn-devel-104
2014-07-10 02:50:44 +02:00

407 lines
11 KiB
C

/*
* 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"
#include "system/filesys.h"
#include "smbd/smbd.h"
#include <fcntl.h>
#include "libcli/security/security.h"
#include "gpfs_fcntl.h"
#include "gpfs_gpl.h"
#include "vfs_gpfs.h"
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);
static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
int *buflen);
static int (*gpfs_set_winattrs_path_fn)(char *pathname, int flags, struct gpfs_winattr *attrs);
static int (*gpfs_get_winattrs_path_fn)(char *pathname, struct gpfs_winattr *attrs);
static int (*gpfs_get_winattrs_fn)(int fd, struct gpfs_winattr *attrs);
static int (*gpfs_prealloc_fn)(int fd, gpfs_off64_t startOffset, gpfs_off64_t bytesToPrealloc);
static int (*gpfs_ftruncate_fn)(int fd, gpfs_off64_t length);
static int (*gpfs_lib_init_fn)(int flags);
static int (*gpfs_set_times_path_fn)(char *pathname, int flags,
gpfs_timestruc_t times[4]);
static int (*gpfs_quotactl_fn)(char *pathname, int cmd, int id, void *bufferP);
static int (*gpfs_fcntl_fn)(gpfs_file_t fileDesc, void *fcntlArgP);
static int (*gpfs_getfilesetid_fn)(char *pathname, char *name, int *idP);
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;
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_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);
}
int smbd_gpfs_ftruncate(int fd, gpfs_off64_t length)
{
if (gpfs_ftruncate_fn == NULL) {
errno = ENOSYS;
return -1;
}
return gpfs_ftruncate_fn(fd, length);
}
int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
int *buflen)
{
if (gpfs_get_realfilename_path_fn == NULL) {
errno = ENOSYS;
return -1;
}
return gpfs_get_realfilename_path_fn(pathname, filenamep, buflen);
}
int get_gpfs_winattrs(char *pathname,struct gpfs_winattr *attrs)
{
if (gpfs_get_winattrs_path_fn == NULL) {
errno = ENOSYS;
return -1;
}
DEBUG(10, ("gpfs_get_winattrs_path:open call %s\n",pathname));
return gpfs_get_winattrs_path_fn(pathname, attrs);
}
int smbd_fget_gpfs_winattrs(int fd, struct gpfs_winattr *attrs)
{
if (gpfs_get_winattrs_fn == NULL) {
errno = ENOSYS;
return -1;
}
DEBUG(10, ("gpfs_get_winattrs:open call %d\n", fd));
return gpfs_get_winattrs_fn(fd, attrs);
}
int smbd_gpfs_prealloc(int fd, gpfs_off64_t start, gpfs_off64_t bytes)
{
if (gpfs_prealloc_fn == NULL) {
errno = ENOSYS;
return -1;
}
return gpfs_prealloc_fn(fd, start, bytes);
}
int set_gpfs_winattrs(char *pathname,int flags,struct gpfs_winattr *attrs)
{
if (gpfs_set_winattrs_path_fn == NULL) {
errno = ENOSYS;
return -1;
}
DEBUG(10, ("gpfs_set_winattrs_path:open call %s\n",pathname));
return gpfs_set_winattrs_path_fn(pathname,flags, attrs);
}
int get_gpfs_quota(const char *pathname, int type, int id,
struct gpfs_quotaInfo *qi)
{
int ret;
if (!gpfs_quotactl_fn) {
errno = ENOSYS;
return -1;
}
ZERO_STRUCTP(qi);
ret = gpfs_quotactl_fn(discard_const_p(char, pathname),
GPFS_QCMD(Q_GETQUOTA, type), id, qi);
if (ret) {
if (errno == GPFS_E_NO_QUOTA_INST) {
DEBUG(10, ("Quotas disabled on GPFS filesystem.\n"));
} else {
DEBUG(0, ("Get quota failed, type %d, id, %d, "
"errno %d.\n", type, id, errno));
}
return ret;
}
DEBUG(10, ("quota type %d, id %d, blk u:%lld h:%lld s:%lld gt:%u\n",
type, id, qi->blockUsage, qi->blockHardLimit,
qi->blockSoftLimit, qi->blockGraceTime));
return ret;
}
int get_gpfs_fset_id(const char *pathname, int *fset_id)
{
int err, fd, errno_fcntl;
struct {
gpfsFcntlHeader_t hdr;
gpfsGetFilesetName_t fsn;
} arg;
if (!gpfs_fcntl_fn || !gpfs_getfilesetid_fn) {
errno = ENOSYS;
return -1;
}
arg.hdr.totalLength = sizeof(arg);
arg.hdr.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
arg.hdr.fcntlReserved = 0;
arg.fsn.structLen = sizeof(arg.fsn);
arg.fsn.structType = GPFS_FCNTL_GET_FILESETNAME;
fd = open(pathname, O_RDONLY);
if (fd == -1) {
DEBUG(1, ("Could not open %s: %s\n",
pathname, strerror(errno)));
return fd;
}
err = gpfs_fcntl_fn(fd, &arg);
errno_fcntl = errno;
close(fd);
if (err) {
errno = errno_fcntl;
DEBUG(1, ("GPFS_FCNTL_GET_FILESETNAME for %s failed: %s\n",
pathname, strerror(errno)));
return err;
}
err = gpfs_getfilesetid_fn(discard_const_p(char, pathname),
arg.fsn.buffer, fset_id);
if (err) {
DEBUG(1, ("gpfs_getfilesetid for %s failed: %s\n",
pathname, strerror(errno)));
}
return err;
}
void smbd_gpfs_lib_init()
{
if (gpfs_lib_init_fn) {
int rc = gpfs_lib_init_fn(0);
DEBUG(10, ("gpfs_lib_init() finished with rc %d "
"and errno %d\n", rc, errno));
} else {
DEBUG(10, ("libgpfs lacks gpfs_lib_init\n"));
}
}
static void timespec_to_gpfs_time(struct timespec ts, gpfs_timestruc_t *gt,
int idx, int *flags)
{
if (!null_timespec(ts)) {
*flags |= 1 << idx;
gt[idx].tv_sec = ts.tv_sec;
gt[idx].tv_nsec = ts.tv_nsec;
DEBUG(10, ("Setting GPFS time %d, flags 0x%x\n", idx, *flags));
}
}
int smbd_gpfs_set_times_path(char *path, struct smb_file_time *ft)
{
gpfs_timestruc_t gpfs_times[4];
int flags = 0;
int rc;
if (!gpfs_set_times_path_fn) {
errno = ENOSYS;
return -1;
}
ZERO_ARRAY(gpfs_times);
timespec_to_gpfs_time(ft->atime, gpfs_times, 0, &flags);
timespec_to_gpfs_time(ft->mtime, gpfs_times, 1, &flags);
/* No good mapping from LastChangeTime to ctime, not storing */
timespec_to_gpfs_time(ft->create_time, gpfs_times, 3, &flags);
if (!flags) {
DEBUG(10, ("nothing to do, return to avoid EINVAL\n"));
return 0;
}
rc = gpfs_set_times_path_fn(path, flags, gpfs_times);
if (rc != 0) {
DEBUG(1,("gpfs_set_times() returned with error %s\n",
strerror(errno)));
}
return rc;
}
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;
DEBUG(10, ("trying to load name %s from %s\n",
fn_name, libname));
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");
init_gpfs_function(&gpfs_get_realfilename_path_fn,
"gpfs_get_realfilename_path");
init_gpfs_function(&gpfs_get_winattrs_path_fn,"gpfs_get_winattrs_path");
init_gpfs_function(&gpfs_set_winattrs_path_fn,"gpfs_set_winattrs_path");
init_gpfs_function(&gpfs_get_winattrs_fn,"gpfs_get_winattrs");
init_gpfs_function(&gpfs_prealloc_fn, "gpfs_prealloc");
init_gpfs_function(&gpfs_ftruncate_fn, "gpfs_ftruncate");
init_gpfs_function(&gpfs_lib_init_fn,"gpfs_lib_init");
init_gpfs_function(&gpfs_set_times_path_fn, "gpfs_set_times_path");
init_gpfs_function(&gpfs_quotactl_fn, "gpfs_quotactl");
init_gpfs_function(&gpfs_fcntl_fn, "gpfs_fcntl");
init_gpfs_function(&gpfs_getfilesetid_fn, "gpfs_getfilesetid");
return;
}