1
0
mirror of https://github.com/samba-team/samba.git synced 2024-12-22 13:34:15 +03:00
samba-mirror/source3/modules/vfs_posixacl.c
Ralph Boehme 92b1499542 vfs: RIP SMB_VFS_SYS_ACL_SET_FILE()
.--. .-,       .-..-.__
        .'(`.-` \_.-'-./`  |\_( "\__
     __.>\ ';  _;---,._|   / __/`'--)
    /.--.  : |/' _.--.<|  /  | |
_..-'    `\     /' /`  /_/ _/_/
 >_.-``-. `Y  /' _;---.`|/))))
'` .-''. \|:  .'   __, .-'"`
 .'--._ `-:  \/:  /'  '.\             _|_
     /.'`\ :;   /'      `-           `-|-`
    -`    |     |                      |
          :.; : |                  .-'~^~`-.
          |:    |                .' _     _ `.
          |:.   |                | |_) | |_) |
          :. :  |                | | \ | |   |
          : ;   |                |           |
          : ;   |                |  SMB_VFS  |
          : ;   |                |  SYS_ACL  |
          : ;   |                | SET_FILE  |
        .jgs. : ;                |           |
-."-/\\\/:::.    `\."-._'."-"_\\-|           |///."-
" -."-.\\"-."//.-".`-."_\\-.".-\\`=.........=`//-".

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
2020-12-17 18:56:29 +00:00

433 lines
9.8 KiB
C

/*
Unix SMB/Netbios implementation.
VFS module to get and set posix acls
Copyright (C) Volker Lendecke 2006
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 "modules/vfs_posixacl.h"
/* prototypes for static functions first - for clarity */
static bool smb_ace_to_internal(acl_entry_t posix_ace,
struct smb_acl_entry *ace);
static struct smb_acl_t *smb_acl_to_internal(acl_t acl, TALLOC_CTX *mem_ctx);
static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm);
static acl_t smb_acl_to_posix(const struct smb_acl_t *acl);
/* public functions - the api */
SMB_ACL_T posixacl_sys_acl_get_file(vfs_handle_struct *handle,
const struct smb_filename *smb_fname,
SMB_ACL_TYPE_T type,
TALLOC_CTX *mem_ctx)
{
struct smb_acl_t *result;
acl_type_t acl_type;
acl_t acl;
switch(type) {
case SMB_ACL_TYPE_ACCESS:
acl_type = ACL_TYPE_ACCESS;
break;
case SMB_ACL_TYPE_DEFAULT:
acl_type = ACL_TYPE_DEFAULT;
break;
default:
errno = EINVAL;
return NULL;
}
acl = acl_get_file(smb_fname->base_name, acl_type);
if (acl == NULL) {
return NULL;
}
result = smb_acl_to_internal(acl, mem_ctx);
acl_free(acl);
return result;
}
SMB_ACL_T posixacl_sys_acl_get_fd(vfs_handle_struct *handle,
files_struct *fsp, TALLOC_CTX *mem_ctx)
{
struct smb_acl_t *result;
acl_t acl = NULL;
if (!fsp->fsp_flags.is_pathref) {
acl = acl_get_fd(fsp_get_io_fd(fsp));
} else if (fsp->fsp_flags.have_proc_fds) {
int fd = fsp_get_pathref_fd(fsp);
const char *proc_fd_path = NULL;
char buf[PATH_MAX];
proc_fd_path = sys_proc_fd_path(fd, buf, sizeof(buf));
if (proc_fd_path == NULL) {
return NULL;
}
acl = acl_get_file(proc_fd_path, ACL_TYPE_ACCESS);
} else {
/*
* This is no longer a handle based call.
*/
acl = acl_get_file(fsp->fsp_name->base_name, ACL_TYPE_ACCESS);
}
if (acl == NULL) {
return NULL;
}
result = smb_acl_to_internal(acl, mem_ctx);
acl_free(acl);
return result;
}
int posixacl_sys_acl_set_file(vfs_handle_struct *handle,
const struct smb_filename *smb_fname,
SMB_ACL_TYPE_T type,
SMB_ACL_T theacl)
{
int res;
acl_type_t acl_type;
acl_t acl;
DEBUG(10, ("Calling acl_set_file: %s, %d\n",
smb_fname->base_name,
type));
switch(type) {
case SMB_ACL_TYPE_ACCESS:
acl_type = ACL_TYPE_ACCESS;
break;
case SMB_ACL_TYPE_DEFAULT:
acl_type = ACL_TYPE_DEFAULT;
break;
default:
errno = EINVAL;
return -1;
}
if ((acl = smb_acl_to_posix(theacl)) == NULL) {
return -1;
}
res = acl_set_file(smb_fname->base_name, acl_type, acl);
if (res != 0) {
DEBUG(10, ("acl_set_file failed: %s\n", strerror(errno)));
}
acl_free(acl);
return res;
}
int posixacl_sys_acl_set_fd(vfs_handle_struct *handle,
files_struct *fsp,
SMB_ACL_TYPE_T type,
SMB_ACL_T theacl)
{
int res;
acl_t acl = smb_acl_to_posix(theacl);
int fd = fsp_get_pathref_fd(fsp);
if (acl == NULL) {
return -1;
}
if (!fsp->fsp_flags.is_pathref && type == SMB_ACL_TYPE_ACCESS) {
res = acl_set_fd(fd, acl);
} else if (fsp->fsp_flags.have_proc_fds) {
const char *proc_fd_path = NULL;
char buf[PATH_MAX];
proc_fd_path = sys_proc_fd_path(fd, buf, sizeof(buf));
if (proc_fd_path == NULL) {
return -1;
}
res = acl_set_file(proc_fd_path, type, acl);
} else {
/*
* This is no longer a handle based call.
*/
res = acl_set_file(fsp->fsp_name->base_name,
type,
acl);
}
acl_free(acl);
return res;
}
int posixacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
const struct smb_filename *smb_fname)
{
return acl_delete_def_file(smb_fname->base_name);
}
/* private functions */
static bool smb_ace_to_internal(acl_entry_t posix_ace,
struct smb_acl_entry *ace)
{
acl_tag_t tag;
acl_permset_t permset;
if (acl_get_tag_type(posix_ace, &tag) != 0) {
DEBUG(0, ("smb_acl_get_tag_type failed\n"));
return False;
}
switch(tag) {
case ACL_USER:
ace->a_type = SMB_ACL_USER;
break;
case ACL_USER_OBJ:
ace->a_type = SMB_ACL_USER_OBJ;
break;
case ACL_GROUP:
ace->a_type = SMB_ACL_GROUP;
break;
case ACL_GROUP_OBJ:
ace->a_type = SMB_ACL_GROUP_OBJ;
break;
case ACL_OTHER:
ace->a_type = SMB_ACL_OTHER;
break;
case ACL_MASK:
ace->a_type = SMB_ACL_MASK;
break;
#ifdef HAVE_ACL_EVERYONE
case ACL_EVERYONE:
DEBUG(1, ("ACL tag type ACL_EVERYONE. FreeBSD with ZFS? Use 'vfs objects = zfsacl'\n"));
return false;
#endif
default:
DEBUG(0, ("unknown tag type %d\n", (unsigned int)tag));
return False;
}
switch(ace->a_type) {
case SMB_ACL_USER: {
uid_t *puid = (uid_t *)acl_get_qualifier(posix_ace);
if (puid == NULL) {
DEBUG(0, ("smb_acl_get_qualifier failed\n"));
return False;
}
ace->info.user.uid = *puid;
acl_free(puid);
break;
}
case SMB_ACL_GROUP: {
gid_t *pgid = (uid_t *)acl_get_qualifier(posix_ace);
if (pgid == NULL) {
DEBUG(0, ("smb_acl_get_qualifier failed\n"));
return False;
}
ace->info.group.gid = *pgid;
acl_free(pgid);
break;
}
default:
break;
}
if (acl_get_permset(posix_ace, &permset) != 0) {
DEBUG(0, ("smb_acl_get_mode failed\n"));
return False;
}
ace->a_perm = 0;
#ifdef HAVE_ACL_GET_PERM_NP
ace->a_perm |= (acl_get_perm_np(permset, ACL_READ) ? SMB_ACL_READ : 0);
ace->a_perm |= (acl_get_perm_np(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
ace->a_perm |= (acl_get_perm_np(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
#else
ace->a_perm |= (acl_get_perm(permset, ACL_READ) ? SMB_ACL_READ : 0);
ace->a_perm |= (acl_get_perm(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0);
ace->a_perm |= (acl_get_perm(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0);
#endif
return True;
}
static struct smb_acl_t *smb_acl_to_internal(acl_t acl, TALLOC_CTX *mem_ctx)
{
struct smb_acl_t *result = sys_acl_init(mem_ctx);
int entry_id = ACL_FIRST_ENTRY;
acl_entry_t e;
if (result == NULL) {
return NULL;
}
while (acl_get_entry(acl, entry_id, &e) == 1) {
entry_id = ACL_NEXT_ENTRY;
result->acl = talloc_realloc(result, result->acl,
struct smb_acl_entry, result->count+1);
if (result->acl == NULL) {
TALLOC_FREE(result);
DEBUG(0, ("talloc_realloc failed\n"));
errno = ENOMEM;
return NULL;
}
if (!smb_ace_to_internal(e, &result->acl[result->count])) {
TALLOC_FREE(result);
return NULL;
}
result->count += 1;
}
return result;
}
static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm)
{
int ret;
acl_permset_t permset;
if ((ret = acl_get_permset(entry, &permset)) != 0) {
return ret;
}
if ((ret = acl_clear_perms(permset)) != 0) {
return ret;
}
if ((perm & SMB_ACL_READ) &&
((ret = acl_add_perm(permset, ACL_READ)) != 0)) {
return ret;
}
if ((perm & SMB_ACL_WRITE) &&
((ret = acl_add_perm(permset, ACL_WRITE)) != 0)) {
return ret;
}
if ((perm & SMB_ACL_EXECUTE) &&
((ret = acl_add_perm(permset, ACL_EXECUTE)) != 0)) {
return ret;
}
return 0;
}
static acl_t smb_acl_to_posix(const struct smb_acl_t *acl)
{
acl_t result;
int i;
result = acl_init(acl->count);
if (result == NULL) {
DEBUG(10, ("acl_init failed\n"));
return NULL;
}
for (i=0; i<acl->count; i++) {
const struct smb_acl_entry *entry = &acl->acl[i];
acl_entry_t e;
acl_tag_t tag;
if (acl_create_entry(&result, &e) != 0) {
DEBUG(1, ("acl_create_entry failed: %s\n",
strerror(errno)));
goto fail;
}
switch (entry->a_type) {
case SMB_ACL_USER:
tag = ACL_USER;
break;
case SMB_ACL_USER_OBJ:
tag = ACL_USER_OBJ;
break;
case SMB_ACL_GROUP:
tag = ACL_GROUP;
break;
case SMB_ACL_GROUP_OBJ:
tag = ACL_GROUP_OBJ;
break;
case SMB_ACL_OTHER:
tag = ACL_OTHER;
break;
case SMB_ACL_MASK:
tag = ACL_MASK;
break;
default:
DEBUG(1, ("Unknown tag value %d\n", entry->a_type));
goto fail;
}
if (acl_set_tag_type(e, tag) != 0) {
DEBUG(10, ("acl_set_tag_type(%d) failed: %s\n",
tag, strerror(errno)));
goto fail;
}
switch (entry->a_type) {
case SMB_ACL_USER:
if (acl_set_qualifier(e, &entry->info.user.uid) != 0) {
DEBUG(1, ("acl_set_qualifiier failed: %s\n",
strerror(errno)));
goto fail;
}
break;
case SMB_ACL_GROUP:
if (acl_set_qualifier(e, &entry->info.group.gid) != 0) {
DEBUG(1, ("acl_set_qualifiier failed: %s\n",
strerror(errno)));
goto fail;
}
break;
default: /* Shut up, compiler! :-) */
break;
}
if (smb_acl_set_mode(e, entry->a_perm) != 0) {
goto fail;
}
}
if (acl_valid(result) != 0) {
char *acl_string = sys_acl_to_text(acl, NULL);
DEBUG(0, ("smb_acl_to_posix: ACL %s is invalid for set (%s)\n",
acl_string, strerror(errno)));
SAFE_FREE(acl_string);
goto fail;
}
return result;
fail:
if (result != NULL) {
acl_free(result);
}
return NULL;
}
/* VFS operations structure */
static struct vfs_fn_pointers posixacl_fns = {
.sys_acl_get_file_fn = posixacl_sys_acl_get_file,
.sys_acl_get_fd_fn = posixacl_sys_acl_get_fd,
.sys_acl_blob_get_file_fn = posix_sys_acl_blob_get_file,
.sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
.sys_acl_set_fd_fn = posixacl_sys_acl_set_fd,
.sys_acl_delete_def_file_fn = posixacl_sys_acl_delete_def_file,
};
static_decl_vfs;
NTSTATUS vfs_posixacl_init(TALLOC_CTX *ctx)
{
return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "posixacl",
&posixacl_fns);
}