/* * 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" #ifdef HAVE_GPFS #include "gpfs_gpl.h" static void *libgpfs_handle = NULL; static BOOL gpfs_share_modes; 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_share_modes) { return True; } 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_share_modes) { return True; } 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")); goto failed; } 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); goto failed; } 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")); goto failed; } 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")); goto failed; } if (lp_parm_bool(-1, "gpfs", "sharemodes", True)) { gpfs_share_modes = True; } else { gpfs_share_modes = False; } return; failed: 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; } #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 */