source: trunk/server/source4/ntvfs/posix/pvfs_fileinfo.c

/* 
   Unix SMB/CIFS implementation.

   POSIX NTVFS backend - 

   Copyright (C) Andrew Tridgell 2004

   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 "vfs_posix.h"

/****************************************************************************
 Change a unix mode to a dos mode.
****************************************************************************/
static uint32_t dos_mode_from_stat(struct pvfs_state *pvfs, struct stat *st)
{
        int result = 0;

        if ((st->st_mode & S_IWUSR) == 0)
                result |= FILE_ATTRIBUTE_READONLY;
        
        if ((pvfs->flags & PVFS_FLAG_MAP_ARCHIVE) && ((st->st_mode & S_IXUSR) != 0))
                result |= FILE_ATTRIBUTE_ARCHIVE;
        
        if ((pvfs->flags & PVFS_FLAG_MAP_SYSTEM) && ((st->st_mode & S_IXGRP) != 0))
                result |= FILE_ATTRIBUTE_SYSTEM;
        
        if ((pvfs->flags & PVFS_FLAG_MAP_HIDDEN) && ((st->st_mode & S_IXOTH) != 0))
                result |= FILE_ATTRIBUTE_HIDDEN;
  
        if (S_ISDIR(st->st_mode))
                result = FILE_ATTRIBUTE_DIRECTORY | (result & FILE_ATTRIBUTE_READONLY);

        return result;
}



/*
  fill in the dos file attributes for a file
*/
NTSTATUS pvfs_fill_dos_info(struct pvfs_state *pvfs, struct pvfs_filename *name,
                            unsigned int flags, int fd)
{
        NTSTATUS status;
        DATA_BLOB lkey;
        NTTIME write_time;

        /* make directories appear as size 0 with 1 link */
        if (S_ISDIR(name->st.st_mode)) {
                name->st.st_size = 0;
                name->st.st_nlink = 1;
        } else if (name->stream_id == 0) {
                name->stream_name = NULL;
        }

        /* for now just use the simple samba mapping */
        unix_to_nt_time(&name->dos.create_time, name->st.st_ctime);
        unix_to_nt_time(&name->dos.access_time, name->st.st_atime);
        unix_to_nt_time(&name->dos.write_time,  name->st.st_mtime);
        unix_to_nt_time(&name->dos.change_time, name->st.st_ctime);
#ifdef HAVE_STAT_TV_NSEC
        name->dos.create_time += name->st.st_ctim.tv_nsec / 100;
        name->dos.access_time += name->st.st_atim.tv_nsec / 100;
        name->dos.write_time  += name->st.st_mtim.tv_nsec / 100;
        name->dos.change_time += name->st.st_ctim.tv_nsec / 100;
#endif
        name->dos.attrib = dos_mode_from_stat(pvfs, &name->st);
        name->dos.alloc_size = pvfs_round_alloc_size(pvfs, name->st.st_size);
        name->dos.nlink = name->st.st_nlink;
        name->dos.ea_size = 4;
        if (pvfs->ntvfs->ctx->protocol == PROTOCOL_SMB2) {
                /* SMB2 represents a null EA with zero bytes */
                name->dos.ea_size = 0;
        }
        
        name->dos.file_id = (((uint64_t)name->st.st_dev)<<32) | name->st.st_ino;
        name->dos.flags = 0;

        status = pvfs_dosattrib_load(pvfs, name, fd);
        NT_STATUS_NOT_OK_RETURN(status);

        if (flags & PVFS_RESOLVE_NO_OPENDB) {
                return NT_STATUS_OK;
        }

        status = pvfs_locking_key(name, name, &lkey);
        NT_STATUS_NOT_OK_RETURN(status);

        status = odb_get_file_infos(pvfs->odb_context, &lkey,
                                    NULL, &write_time);
        data_blob_free(&lkey);
        if (!NT_STATUS_IS_OK(status)) {
                DEBUG(1,("WARNING: odb_get_file_infos: %s\n", nt_errstr(status)));
                return status;
        }

        if (!null_time(write_time)) {
                name->dos.write_time = write_time;
        }

        return NT_STATUS_OK;
}


/*
  return a set of unix file permissions for a new file or directory
*/
mode_t pvfs_fileperms(struct pvfs_state *pvfs, uint32_t attrib)
{
        mode_t mode = (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH);

        if (!(pvfs->flags & PVFS_FLAG_XATTR_ENABLE) &&
            (attrib & FILE_ATTRIBUTE_READONLY)) {
                mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
        }

        if (!(pvfs->flags & PVFS_FLAG_XATTR_ENABLE)) {
                if ((attrib & FILE_ATTRIBUTE_ARCHIVE) &&
                    (pvfs->flags & PVFS_FLAG_MAP_ARCHIVE)) {
                        mode |= S_IXUSR;
                }
                if ((attrib & FILE_ATTRIBUTE_SYSTEM) &&
                    (pvfs->flags & PVFS_FLAG_MAP_SYSTEM)) {
                        mode |= S_IXGRP;
                }
                if ((attrib & FILE_ATTRIBUTE_HIDDEN) &&
                    (pvfs->flags & PVFS_FLAG_MAP_HIDDEN)) {
                        mode |= S_IXOTH;
                }
        }

        if (attrib & FILE_ATTRIBUTE_DIRECTORY) {
                mode |= (S_IFDIR | S_IWUSR);
                mode |= (S_IXUSR | S_IXGRP | S_IXOTH);                 
                mode &= pvfs->options.dir_mask;
                mode |= pvfs->options.force_dir_mode;
        } else {
                mode &= pvfs->options.create_mask;
                mode |= pvfs->options.force_create_mode;
        }

        return mode;
}