diff options
Diffstat (limited to 'source3/modules/gpfs.c')
| -rw-r--r-- | source3/modules/gpfs.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/source3/modules/gpfs.c b/source3/modules/gpfs.c new file mode 100644 index 0000000000..f63a85294b --- /dev/null +++ b/source3/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 */ |