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/* file_get_storage_info RPC for NFS client filesystem
Copyright (C) 2001 Free Software Foundation, Inc.
This file is part of the GNU Hurd.
The GNU Hurd 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, or (at
your option) any later version.
The GNU Hurd 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include "nfs.h"
#include <hurd/netfs.h>
#include <stdio.h>
error_t
netfs_file_get_storage_info (struct iouser *cred,
struct node *np,
mach_port_t **ports,
mach_msg_type_name_t *ports_type,
mach_msg_type_number_t *num_ports,
int **ints,
mach_msg_type_number_t *num_ints,
off_t **offsets,
mach_msg_type_number_t *num_offsets,
char **data,
mach_msg_type_number_t *data_len)
{
int name_len, fhpos;
error_t err;
inline int fmt (size_t buflen)
{
return snprintf (*data, buflen,
"nfsv%u://%s:%u/%n%*c?rsize=%u&wsize=%u",
protocol_version, mounted_hostname, mounted_nfs_port,
&fhpos, np->nn->handle.size * 2, 'X', /* filled below */
read_size, write_size);
}
/* We return the file size, so make sure we have it up to date now. */
err = netfs_validate_stat (np, cred);
if (err)
return err;
/* Format the name, and then do it again if the buffer was too short. */
name_len = fmt (*data_len);
if (name_len < 0)
return errno;
++name_len; /* Include the terminating null. */
if (name_len <= *data_len)
*data_len = name_len;
else
{
*data = mmap (0, name_len, PROT_READ|PROT_WRITE, MAP_ANON, 0, 0);
if (*data == MAP_FAILED)
return errno;
*data_len = fmt (name_len) + 1;
assert (*data_len == name_len);
}
/* Now fill in the file handle data in hexadecimal. */
{
static const char hexdigits[] = "0123456789abcdef";
size_t i;
for (i = 0; i < np->nn->handle.size; ++i)
{
(*data)[fhpos++] = hexdigits[(uint8_t)np->nn->handle.data[i] >> 4];
(*data)[fhpos++] = hexdigits[(uint8_t)np->nn->handle.data[i] & 0xf];
}
}
/* Now fill in the rest of the canonical-form storage-info data, which
just describes a single run of the file's size, a block-size of one
byte, and our URL as the name for the network store type. */
*num_ports = 0;
assert (*num_offsets >= 2); /* mig always gives us some */
*num_offsets = 2;
(*offsets)[0] = 0;
(*offsets)[1] = np->nn_stat.st_size;
assert (*num_ints >= 6); /* mig always gives us some */
*num_ints = 1;
(*ints)[0] = STORAGE_NETWORK;
(*ints)[1] = 0; /* XXX readonly if we supported it */
(*ints)[2] = 1; /* block size */
(*ints)[3] = 1; /* 1 run in offsets list */
(*ints)[4] = name_len;
(*ints)[5] = 0; /* misc len */
return 0;
}
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