diff options
Diffstat (limited to 'nfs/storage-info.c')
| -rw-r--r-- | nfs/storage-info.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/nfs/storage-info.c b/nfs/storage-info.c new file mode 100644 index 00000000..7427b3d8 --- /dev/null +++ b/nfs/storage-info.c @@ -0,0 +1,104 @@ +/* file_get_storage_info RPC for NFS client filesystem + Copyright (C) 2001,02 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, (int) (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; + *ports_type = MACH_MSG_TYPE_COPY_SEND; + + 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; +} |