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/*
Unix SMB/CIFS implementation.
Wrap VxFS xattr calls.
Copyright (C) Veritas Technologies LLC <www.veritas.com> 2016
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 "smbd/smbd.h"
#include "system/filesys.h"
#include "string.h"
#include "vfs_vxfs.h"
/*
* Available under GPL at
* http://www.veritas.com/community/downloads/vxfsmisc-library
*/
#define LIBVXFS "/usr/lib64/vxfsmisc.so"
static int (*vxfs_setxattr_fd_func) (int fd, const char *name,
const void *value, size_t len, int flags);
static int (*vxfs_getxattr_fd_func) (int fd, const char *name, void *value,
size_t *len);
static int (*vxfs_removexattr_fd_func) (int fd, const char *name);
static int (*vxfs_listxattr_fd_func) (int fd, void *value, size_t *len);
static int (*vxfs_setwxattr_fd_func) (int fd);
static int (*vxfs_checkwxattr_fd_func) (int fd);
int vxfs_setxattr_fd(int fd, const char *name, const void *value,
size_t len, int flags)
{
int ret = -1;
DBG_DEBUG("In vxfs_setxattr_fd fd %d name %s len %zu flags %d\n",
fd, name, len, flags);
if (vxfs_setxattr_fd_func == NULL) {
errno = ENOSYS;
return ret;
}
DBG_DEBUG("Calling vxfs_setxattr_fd\n");
ret = vxfs_setxattr_fd_func(fd, name, value, len, flags);
DBG_DEBUG("vxfs_setxattr_fd ret = %d \n", ret);
if (ret) {
errno = ret;
ret = -1;
}
return ret;
}
int vxfs_getxattr_fd(int fd, const char *name, void *value, size_t len)
{
int ret;
size_t size = len;
DBG_DEBUG("In vxfs_getxattr_fd fd %d name %s len %zu\n",
fd, name, len);
if (vxfs_getxattr_fd_func == NULL) {
errno = ENOSYS;
return -1;
}
DBG_DEBUG("Calling vxfs_getxattr_fd with %s\n", name);
ret = vxfs_getxattr_fd_func(fd, name, value, &size);
DBG_DEBUG("vxfs_getxattr_fd ret = %d\n", ret);
if (ret) {
errno = ret;
if (ret == EFBIG) {
errno = ERANGE;
}
return -1;
}
DBG_DEBUG("vxfs_getxattr_fd done with size %zu\n", size);
return size;
}
int vxfs_getxattr_path(const char *path, const char *name, void *value,
size_t len)
{
int ret, fd = -1;
DBG_DEBUG("In vxfs_getxattr_path path %s name %s len %zu\n",
path, name, len);
fd = open(path, O_RDONLY);
if (fd == -1) {
DBG_DEBUG("file not opened: vxfs_getxattr_path for %s\n",
path);
return -1;
}
ret = vxfs_getxattr_fd(fd, name, value, len);
close(fd);
return ret;
}
int vxfs_removexattr_fd(int fd, const char *name)
{
int ret = 0;
DBG_DEBUG("In vxfs_removexattr_fd fd %d name %s\n", fd, name);
if (vxfs_removexattr_fd_func == NULL) {
errno = ENOSYS;
return -1;
}
DBG_DEBUG("Calling vxfs_removexattr_fd with %s\n", name);
ret = vxfs_removexattr_fd_func(fd, name);
if (ret) {
errno = ret;
ret = -1;
}
return ret;
}
int vxfs_listxattr_fd(int fd, char *list, size_t size)
{
int ret;
size_t len = size;
DBG_DEBUG("In vxfs_listxattr_fd fd %d list %s size %zu\n", fd, list, size);
if (vxfs_listxattr_fd_func == NULL) {
errno = ENOSYS;
return -1;
}
ret = vxfs_listxattr_fd_func(fd, list, &len);
DBG_DEBUG("vxfs_listxattr_fd: returned ret = %d\n", ret);
DBG_DEBUG("In vxfs_listxattr_fd done with len %zu\n", len);
if (ret) {
errno = ret;
if (ret == EFBIG) {
errno = ERANGE;
}
return -1;
}
return len;
}
int vxfs_setwxattr_fd(int fd)
{
int ret = 0;
DBG_DEBUG("In vxfs_setwxattr_fd fd %d\n", fd);
if (vxfs_setwxattr_fd_func == NULL) {
errno = ENOSYS;
return -1;
}
ret = vxfs_setwxattr_fd_func(fd);
DBG_DEBUG("ret = %d\n", ret);
if (ret != 0) {
errno = ret;
ret = -1;
}
return ret;
}
int vxfs_setwxattr_path(const char *path, bool is_dir)
{
int ret, fd = -1;
DBG_DEBUG("In vxfs_setwxattr_path path %s is_dir %d\n", path, is_dir);
if (is_dir) {
fd = open(path, O_RDONLY|O_DIRECTORY);
} else {
fd = open(path, O_WRONLY);
}
if (fd == -1) {
DBG_DEBUG("file %s not opened, errno:%s\n",
path, strerror(errno));
return -1;
}
ret = vxfs_setwxattr_fd(fd);
DBG_DEBUG("ret = %d\n", ret);
close(fd);
return ret;
}
int vxfs_checkwxattr_fd(int fd)
{
int ret;
DBG_DEBUG("In vxfs_checkwxattr_fd fd %d\n", fd);
if (vxfs_checkwxattr_fd_func == NULL) {
errno = ENOSYS;
return -1;
}
ret = vxfs_checkwxattr_fd_func(fd);
DBG_DEBUG("ret = %d\n", ret);
if (ret != 0) {
errno = ret;
ret = -1;
}
return ret;
}
int vxfs_checkwxattr_path(const char *path)
{
int ret, fd = -1;
DBG_DEBUG("In vxfs_checkwxattr_path path %s\n", path);
fd = open(path, O_RDONLY);
if (fd == -1) {
DBG_DEBUG("file %s not opened, errno:%s\n",
path, strerror(errno));
return -1;
}
ret = vxfs_checkwxattr_fd(fd);
close(fd);
return ret;
}
static bool load_lib_vxfs_function(void *lib_handle, void *fn_ptr,
const char *fnc_name)
{
void **vlib_handle = (void **)lib_handle;
void **fn_pointer = (void **)fn_ptr;
*fn_pointer = dlsym(*vlib_handle, fnc_name);
if (*fn_pointer == NULL) {
DEBUG(10, ("Cannot find symbol for %s\n", fnc_name));
return true;
}
return false;
}
void vxfs_init()
{
static void *lib_handle = NULL;
if (lib_handle != NULL ) {
return;
}
lib_handle = dlopen(LIBVXFS, RTLD_LAZY);
if (lib_handle == NULL) {
DEBUG(10, ("Cannot get lib handle\n"));
return;
}
DEBUG(10, ("Calling vxfs_init\n"));
load_lib_vxfs_function(&lib_handle, &vxfs_setxattr_fd_func,
"vxfs_nxattr_set");
load_lib_vxfs_function(&lib_handle, &vxfs_getxattr_fd_func,
"vxfs_nxattr_get");
load_lib_vxfs_function(&lib_handle, &vxfs_removexattr_fd_func,
"vxfs_nxattr_remove");
load_lib_vxfs_function(&lib_handle, &vxfs_listxattr_fd_func,
"vxfs_nxattr_list");
load_lib_vxfs_function(&lib_handle, &vxfs_setwxattr_fd_func,
"vxfs_wattr_set");
load_lib_vxfs_function(&lib_handle, &vxfs_checkwxattr_fd_func,
"vxfs_wattr_check");
}
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