modules/vfs_aixacl.c

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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 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"

extern SMB_ACL_T aixacl_to_smbacl( struct acl *file_acl);
extern struct acl *aixacl_smb_to_aixacl(SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);

SMB_ACL_T aixacl_sys_acl_get_file(vfs_handle_struct *handle,
                                    const char *path_p,
                                    SMB_ACL_TYPE_T type)
{
        struct acl *file_acl = (struct acl *)NULL;
        struct smb_acl_t *result = (struct smb_acl_t *)NULL;
        
        int rc = 0;
        uid_t user_id;

        /* AIX has no DEFAULT */
        if  ( type == SMB_ACL_TYPE_DEFAULT )
                return NULL;

        /* Get the acl using statacl */
 
        DEBUG(10,("Entering AIX sys_acl_get_file\n"));
        DEBUG(10,("path_p is %s\n",path_p));

        file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);
 
        if(file_acl == NULL) {
                errno=ENOMEM;
                DEBUG(0,("Error in AIX sys_acl_get_file: %d\n",errno));
                return(NULL);
        }

        memset(file_acl,0,BUFSIZ);

        rc = statacl((char *)path_p,0,file_acl,BUFSIZ);
        if( (rc == -1) && (errno == ENOSPC)) {
                struct acl *new_acl = SMB_MALLOC(file_acl->acl_len + sizeof(struct acl));
                if( new_acl == NULL) {
                        SAFE_FREE(file_acl);
                        errno = ENOMEM;
                        return NULL;
                }
                file_acl = new_acl;
                rc = statacl((char *)path_p,0,file_acl,file_acl->acl_len+sizeof(struct acl));
                if( rc == -1) {
                        DEBUG(0,("statacl returned %d with errno %d\n",rc,errno));
                        SAFE_FREE(file_acl);
                        return(NULL);
                }
        }

        DEBUG(10,("Got facl and returned it\n"));

        
        result = aixacl_to_smbacl(file_acl);
        SAFE_FREE(file_acl);
        return result;
        
        /*errno = ENOTSUP;
        return NULL;*/
}

SMB_ACL_T aixacl_sys_acl_get_fd(vfs_handle_struct *handle,
                                  files_struct *fsp,
                                  int fd)
{

        struct acl *file_acl = (struct acl *)NULL;
        struct smb_acl_t *result = (struct smb_acl_t *)NULL;
        
        int rc = 0;
        uid_t user_id;

        /* Get the acl using fstatacl */
   
        DEBUG(10,("Entering AIX sys_acl_get_fd\n"));
        DEBUG(10,("fd is %d\n",fd));
        file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);

        if(file_acl == NULL) {
                errno=ENOMEM;
                DEBUG(0,("Error in AIX sys_acl_get_fd is %d\n",errno));
                return(NULL);
        }

        memset(file_acl,0,BUFSIZ);

        rc = fstatacl(fd,0,file_acl,BUFSIZ);
        if( (rc == -1) && (errno == ENOSPC)) {
                struct acl *new_acl = SMB_MALLOC(file_acl->acl_len + sizeof(struct acl));
                if( new_acl == NULL) {
                        SAFE_FREE(file_acl);
                        errno = ENOMEM;
                        return NULL;
                }
                file_acl = new_acl;
                rc = fstatacl(fd,0,file_acl,file_acl->acl_len + sizeof(struct acl));
                if( rc == -1) {
                        DEBUG(0,("fstatacl returned %d with errno %d\n",rc,errno));
                        SAFE_FREE(file_acl);
                        return(NULL);
                }
        }

        DEBUG(10,("Got facl and returned it\n"));

        result = aixacl_to_smbacl(file_acl);
        SAFE_FREE(file_acl);
        return result;
        
        /*errno = ENOTSUP;
        return NULL;*/
}

int aixacl_sys_acl_set_file(vfs_handle_struct *handle,
                              const char *name,
                              SMB_ACL_TYPE_T type,
                              SMB_ACL_T theacl)
{
        struct acl *file_acl = NULL;
        uint rc;
        
        file_acl = aixacl_smb_to_aixacl(type, theacl);
        if (!file_acl)
                return -1;

        rc = chacl((char *)name,file_acl,file_acl->acl_len);
        DEBUG(10,("errno is %d\n",errno));
        DEBUG(10,("return code is %d\n",rc));
        SAFE_FREE(file_acl);
        DEBUG(10,("Exiting the aixacl_sys_acl_set_file\n"));

        return rc;
}

int aixacl_sys_acl_set_fd(vfs_handle_struct *handle,
                            files_struct *fsp,
                            int fd, SMB_ACL_T theacl)
{
        struct acl *file_acl = NULL;
        uint rc;

        file_acl = aixacl_smb_to_aixacl(SMB_ACL_TYPE_ACCESS, theacl);
        if (!file_acl)
                return -1;

        rc = fchacl(fd,file_acl,file_acl->acl_len);
        DEBUG(10,("errno is %d\n",errno));
        DEBUG(10,("return code is %d\n",rc));
        SAFE_FREE(file_acl);
        DEBUG(10,("Exiting aixacl_sys_acl_set_fd\n"));

        return rc;
}

int aixacl_sys_acl_delete_def_file(vfs_handle_struct *handle,
                                     const char *path)
{
        return 0; /* otherwise you can't set acl at upper level */
}

/* VFS operations structure */

static vfs_op_tuple aixacl_op_tuples[] = {
        /* Disk operations */
  {SMB_VFS_OP(aixacl_sys_acl_get_file),
   SMB_VFS_OP_SYS_ACL_GET_FILE,
   SMB_VFS_LAYER_TRANSPARENT},

  {SMB_VFS_OP(aixacl_sys_acl_get_fd),
   SMB_VFS_OP_SYS_ACL_GET_FD,
   SMB_VFS_LAYER_TRANSPARENT},

  {SMB_VFS_OP(aixacl_sys_acl_set_file),
   SMB_VFS_OP_SYS_ACL_SET_FILE,
   SMB_VFS_LAYER_TRANSPARENT},

  {SMB_VFS_OP(aixacl_sys_acl_set_fd),
   SMB_VFS_OP_SYS_ACL_SET_FD,
   SMB_VFS_LAYER_TRANSPARENT},

  {SMB_VFS_OP(aixacl_sys_acl_delete_def_file),
   SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
   SMB_VFS_LAYER_TRANSPARENT},

  {SMB_VFS_OP(NULL),
   SMB_VFS_OP_NOOP,
   SMB_VFS_LAYER_NOOP}
};

NTSTATUS vfs_aixacl_init(void);
NTSTATUS vfs_aixacl_init(void)
{
        return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "aixacl",
                                aixacl_op_tuples);
}

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