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0a896094c6
GPFS provides the gpfs_prealloc call. Implement the fallocate callback with mode VFS_FALLOCATE_EXTEND_SIZE using this call. There is no support for VFS_FALLOCATE_KEEP_SIZE, so report this mode as not available.
352 lines
9.3 KiB
C
352 lines
9.3 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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#include "system/filesys.h"
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#include "smbd/smbd.h"
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#include "libcli/security/security.h"
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#include "gpfs_fcntl.h"
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#include "gpfs_gpl.h"
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#include "vfs_gpfs.h"
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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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static int (*gpfs_prealloc_fn)(int fd, gpfs_off64_t startOffset, gpfs_off64_t bytesToPrealloc);
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static int (*gpfs_ftruncate_fn)(int fd, gpfs_off64_t length);
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static int (*gpfs_lib_init_fn)(int flags);
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static int (*gpfs_quotactl_fn)(char *pathname, int cmd, int id, void *bufferP);
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static int (*gpfs_fcntl_fn)(gpfs_file_t fileDesc, void *fcntlArgP);
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static int (*gpfs_getfilesetid_fn)(char *pathname, char *name, int *idP);
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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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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_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_ftruncate(int fd, gpfs_off64_t length)
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{
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if (gpfs_ftruncate_fn == NULL) {
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errno = ENOSYS;
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return -1;
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}
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return gpfs_ftruncate_fn(fd, length);
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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_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_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_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 smbd_gpfs_prealloc(int fd, gpfs_off64_t start, gpfs_off64_t bytes)
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{
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if (gpfs_prealloc_fn == NULL) {
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errno = ENOSYS;
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return -1;
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}
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return gpfs_prealloc_fn(fd, start, bytes);
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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_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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int get_gpfs_quota(const char *pathname, int type, int id,
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struct gpfs_quotaInfo *qi)
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{
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int ret;
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if (!gpfs_quotactl_fn) {
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errno = ENOSYS;
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return -1;
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}
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ZERO_STRUCTP(qi);
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ret = gpfs_quotactl_fn(discard_const_p(char, pathname),
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GPFS_QCMD(Q_GETQUOTA, type), id, qi);
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if (ret) {
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if (errno == GPFS_E_NO_QUOTA_INST) {
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DEBUG(10, ("Quotas disabled on GPFS filesystem.\n"));
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} else {
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DEBUG(0, ("Get quota failed, type %d, id, %d, "
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"errno %d.\n", type, id, errno));
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}
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return ret;
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}
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DEBUG(10, ("quota type %d, id %d, blk u:%lld h:%lld s:%lld gt:%u\n",
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type, id, qi->blockUsage, qi->blockHardLimit,
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qi->blockSoftLimit, qi->blockGraceTime));
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return ret;
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}
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int get_gpfs_fset_id(const char *pathname, int *fset_id)
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{
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int err, fd, errno_fcntl;
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struct {
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gpfsFcntlHeader_t hdr;
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gpfsGetFilesetName_t fsn;
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} arg;
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if (!gpfs_fcntl_fn || !gpfs_getfilesetid_fn) {
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errno = ENOSYS;
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return -1;
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}
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arg.hdr.totalLength = sizeof(arg);
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arg.hdr.fcntlVersion = GPFS_FCNTL_CURRENT_VERSION;
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arg.hdr.fcntlReserved = 0;
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arg.fsn.structLen = sizeof(arg.fsn);
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arg.fsn.structType = GPFS_FCNTL_GET_FILESETNAME;
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fd = open(pathname, O_RDONLY);
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if (fd == -1)
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return fd;
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err = gpfs_fcntl_fn(fd, &arg);
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errno_fcntl = errno;
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close(fd);
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if (err) {
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errno = errno_fcntl;
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return err;
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}
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return gpfs_getfilesetid_fn(discard_const_p(char, pathname),
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arg.fsn.buffer, fset_id);
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}
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void smbd_gpfs_lib_init()
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{
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if (gpfs_lib_init_fn) {
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int rc = gpfs_lib_init_fn(0);
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DEBUG(10, ("gpfs_lib_init() finished with rc %d "
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"and errno %d\n", rc, errno));
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} else {
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DEBUG(10, ("libgpfs lacks gpfs_lib_init\n"));
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}
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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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init_gpfs_function(&gpfs_prealloc_fn, "gpfs_prealloc");
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init_gpfs_function(&gpfs_ftruncate_fn, "gpfs_ftruncate");
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init_gpfs_function(&gpfs_lib_init_fn,"gpfs_lib_init");
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init_gpfs_function(&gpfs_quotactl_fn, "gpfs_quotactl");
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init_gpfs_function(&gpfs_fcntl_fn, "gpfs_fcntl");
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init_gpfs_function(&gpfs_getfilesetid_fn, "gpfs_getfilesetid");
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return;
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}
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