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/*
Unix SMB/Netbios implementation.
VFS module to get and set posix acls
Copyright (C) Jim McDonough <jmcd@us.ibm.com> 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 "vfs_aixacl_util.h"
SMB_ACL_T aixacl_to_smbacl(struct acl *file_acl, TALLOC_CTX *mem_ctx)
{
struct acl_entry *acl_entry;
struct ace_id *idp;
struct smb_acl_t *result = sys_acl_init(mem_ctx);
struct smb_acl_entry *ace;
int i;
if (result == NULL) {
return NULL;
}
/* Point to the first acl entry in the acl */
acl_entry = file_acl->acl_ext;
DEBUG(10,("acl_entry is %p\n",(void *)acl_entry));
DEBUG(10,("acl_last(file_acl) id %p\n",(void *)acl_last(file_acl)));
/* Check if the extended acl bit is on. *
* If it isn't, do not show the *
* contents of the acl since AIX intends *
* the extended info to remain unused */
if(file_acl->acl_mode & S_IXACL){
/* while we are not pointing to the very end */
while(acl_entry < acl_last(file_acl)) {
/* before we malloc anything, make sure this is */
/* a valid acl entry and one that we want to map */
idp = id_nxt(acl_entry->ace_id);
if((acl_entry->ace_type == ACC_SPECIFY ||
(acl_entry->ace_type == ACC_PERMIT)) && (idp != id_last(acl_entry))) {
acl_entry = acl_nxt(acl_entry);
continue;
}
idp = acl_entry->ace_id;
DEBUG(10,("idp->id_data is %d\n",idp->id_data[0]));
result->acl = talloc_realloc(result, result->acl, struct smb_acl_entry, result->count+1);
if (result == NULL) {
DEBUG(0, ("talloc_realloc failed\n"));
errno = ENOMEM;
return NULL;
}
DEBUG(10,("idp->id_type is %d\n",idp->id_type));
ace = &result->acl[result->count];
ace->a_type = idp->id_type;
switch(ace->a_type) {
case ACEID_USER: {
ace->info.user.uid = idp->id_data[0];
DEBUG(10,("case ACEID_USER ace->info.user.uid is %d\n",ace->info.user.uid));
ace->a_type = SMB_ACL_USER;
break;
}
case ACEID_GROUP: {
ace->info.group.gid = idp->id_data[0];
DEBUG(10,("case ACEID_GROUP ace->info.group.gid is %d\n",ace->info.group.gid));
ace->a_type = SMB_ACL_GROUP;
break;
}
default:
break;
}
/* The access in the acl entries must be left shifted by *
* three bites, because they will ultimately be compared *
* to S_IRUSR, S_IWUSR, and S_IXUSR. */
switch(acl_entry->ace_type){
case ACC_PERMIT:
case ACC_SPECIFY:
ace->a_perm = acl_entry->ace_access;
ace->a_perm <<= 6;
DEBUG(10,("ace->a_perm is %d\n",ace->a_perm));
break;
case ACC_DENY:
/* Since there is no way to return a DENY acl entry *
* change to PERMIT and then shift. */
DEBUG(10,("acl_entry->ace_access is %d\n",acl_entry->ace_access));
ace->a_perm = ~acl_entry->ace_access & 7;
DEBUG(10,("ace->a_perm is %d\n",ace->a_perm));
ace->a_perm <<= 6;
break;
default:
DEBUG(0, ("unknown ace->type\n"));
TALLOC_FREE(result);
return(0);
}
result->count++;
ace->a_perm |= (ace->a_perm & S_IRUSR) ? SMB_ACL_READ : 0;
ace->a_perm |= (ace->a_perm & S_IWUSR) ? SMB_ACL_WRITE : 0;
ace->a_perm |= (ace->a_perm & S_IXUSR) ? SMB_ACL_EXECUTE : 0;
DEBUG(10,("ace->a_perm is %d\n",ace->a_perm));
DEBUG(10,("acl_entry = %p\n",(void *)acl_entry));
DEBUG(10,("The ace_type is %d\n",acl_entry->ace_type));
acl_entry = acl_nxt(acl_entry);
}
} /* end of if enabled */
/* Since owner, group, other acl entries are not *
* part of the acl entries in an acl, they must *
* be dummied up to become part of the list. */
for( i = 1; i < 4; i++) {
DEBUG(10,("i is %d\n",i));
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;
DEBUG(0,("Error in AIX sys_acl_get_file is %d\n",errno));
return NULL;
}
ace = &result->acl[result->count];
ace->info.user.uid = 0;
ace->info.group.gid = 0;
DEBUG(10,("ace->info.user.uid = %d\n",ace->info.user.uid));
switch(i) {
case 2:
ace->a_perm = file_acl->g_access << 6;
ace->a_type = SMB_ACL_GROUP_OBJ;
break;
case 3:
ace->a_perm = file_acl->o_access << 6;
ace->a_type = SMB_ACL_OTHER;
break;
case 1:
ace->a_perm = file_acl->u_access << 6;
ace->a_type = SMB_ACL_USER_OBJ;
break;
default:
return(NULL);
}
ace->a_perm |= ((ace->a_perm & S_IRUSR) ? SMB_ACL_READ : 0);
ace->a_perm |= ((ace->a_perm & S_IWUSR) ? SMB_ACL_WRITE : 0);
ace->a_perm |= ((ace->a_perm & S_IXUSR) ? SMB_ACL_EXECUTE : 0);
memcpy(&result->acl[result->count],ace,sizeof(struct smb_acl_entry));
result->count++;
DEBUG(10,("ace->a_perm = %d\n",ace->a_perm));
DEBUG(10,("ace->a_type = %d\n",ace->a_type));
}
return result;
}
static ushort aixacl_smb_to_aixperm(SMB_ACL_PERM_T a_perm)
{
ushort ret = (ushort)0;
if (a_perm & SMB_ACL_READ)
ret |= R_ACC;
if (a_perm & SMB_ACL_WRITE)
ret |= W_ACC;
if (a_perm & SMB_ACL_EXECUTE)
ret |= X_ACC;
return ret;
}
struct acl *aixacl_smb_to_aixacl(SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
struct smb_acl_entry *smb_entry = NULL;
struct acl *file_acl = NULL;
struct acl *file_acl_temp = NULL;
struct acl_entry *acl_entry = NULL;
struct ace_id *ace_id = NULL;
unsigned int id_type;
unsigned int acl_length;
int i;
DEBUG(10,("Entering aixacl_smb_to_aixacl\n"));
/* AIX has no default ACL */
if(acltype == SMB_ACL_TYPE_DEFAULT)
return NULL;
acl_length = BUFSIZ;
file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);
if(file_acl == NULL) {
errno = ENOMEM;
DEBUG(0,("Error in aixacl_smb_to_aixacl is %d\n",errno));
return NULL;
}
memset(file_acl,0,BUFSIZ);
file_acl->acl_len = ACL_SIZ;
file_acl->acl_mode = S_IXACL;
for(i=0; i<theacl->count; i++ ) {
smb_entry = &(theacl->acl[i]);
id_type = smb_entry->a_type;
DEBUG(10,("The id_type is %d\n",id_type));
switch(id_type) {
case SMB_ACL_USER_OBJ:
file_acl->u_access = aixacl_smb_to_aixperm(smb_entry->a_perm);
continue;
case SMB_ACL_GROUP_OBJ:
file_acl->g_access = aixacl_smb_to_aixperm(smb_entry->a_perm);
continue;
case SMB_ACL_OTHER:
file_acl->o_access = aixacl_smb_to_aixperm(smb_entry->a_perm);
continue;
case SMB_ACL_MASK:
continue;
case SMB_ACL_GROUP:
break; /* process this */
case SMB_ACL_USER:
break; /* process this */
default: /* abnormal case */
DEBUG(10,("The id_type is unknown !\n"));
continue;
}
if((file_acl->acl_len + sizeof(struct acl_entry)) > acl_length) {
acl_length += sizeof(struct acl_entry);
file_acl_temp = (struct acl *)SMB_MALLOC(acl_length);
if(file_acl_temp == NULL) {
SAFE_FREE(file_acl);
errno = ENOMEM;
DEBUG(0,("Error in aixacl_smb_to_aixacl is %d\n",errno));
return NULL;
}
memcpy(file_acl_temp,file_acl,file_acl->acl_len);
SAFE_FREE(file_acl);
file_acl = file_acl_temp;
}
acl_entry = (struct acl_entry *)((char *)file_acl + file_acl->acl_len);
file_acl->acl_len += sizeof(struct acl_entry);
acl_entry->ace_len = sizeof(struct acl_entry); /* contains 1 ace_id */
acl_entry->ace_access = aixacl_smb_to_aixperm(smb_entry->a_perm);
/* In order to use this, we'll need to wait until we can get denies */
/* if(!acl_entry->ace_access && acl_entry->ace_type == ACC_PERMIT)
acl_entry->ace_type = ACC_SPECIFY; */
acl_entry->ace_type = ACC_SPECIFY;
ace_id = acl_entry->ace_id;
ace_id->id_type = (smb_entry->a_type==SMB_ACL_GROUP) ? ACEID_GROUP : ACEID_USER;
DEBUG(10,("The id type is %d\n",ace_id->id_type));
ace_id->id_len = sizeof(struct ace_id); /* contains 1 id_data */
ace_id->id_data[0] = (smb_entry->a_type==SMB_ACL_GROUP) ? smb_entry->info.group.gid : smb_entry->info.user.uid;
}
return file_acl;
}
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