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https://github.com/reactos/reactos.git
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177 lines
5.8 KiB
C
177 lines
5.8 KiB
C
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/* NFSv4.1 client for Windows
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* Copyright <EFBFBD> 2012 The Regents of the University of Michigan
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*
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* Olga Kornievskaia <aglo@umich.edu>
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* Casey Bodley <cbodley@umich.edu>
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*
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* This library is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at
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* your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* without any warranty; without even the implied warranty of merchantability
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* or fitness for a particular purpose. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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*/
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#include <windows.h>
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#include <strsafe.h>
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#include <stdio.h>
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#include <time.h>
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#include "nfs41_ops.h"
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#include "from_kernel.h"
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#include "upcall.h"
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#include "util.h"
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#include "daemon_debug.h"
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/* windows volume queries want size in 'units', so we have to
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* convert the nfs space_* attributes from bytes to units */
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#define SECTORS_PER_UNIT 8
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#define BYTES_PER_SECTOR 512
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#define BYTES_PER_UNIT (SECTORS_PER_UNIT * BYTES_PER_SECTOR)
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#define TO_UNITS(bytes) (bytes / BYTES_PER_UNIT)
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#define VOLUME_CACHE_EXPIRATION 20
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/* NFS41_VOLUME_QUERY */
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static int parse_volume(unsigned char *buffer, uint32_t length, nfs41_upcall *upcall)
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{
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int status;
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volume_upcall_args *args = &upcall->args.volume;
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status = safe_read(&buffer, &length, &args->query, sizeof(FS_INFORMATION_CLASS));
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if (status) goto out;
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dprintf(1, "parsing NFS41_VOLUME_QUERY: query=%d\n", args->query);
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out:
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return status;
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}
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static int get_volume_size_info(
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IN nfs41_open_state *state,
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IN const char *query,
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OUT OPTIONAL PLONGLONG total_out,
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OUT OPTIONAL PLONGLONG user_out,
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OUT OPTIONAL PLONGLONG avail_out)
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{
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nfs41_file_info info = { 0 };
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nfs41_superblock *superblock = state->file.fh.superblock;
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int status = ERROR_NOT_FOUND;
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AcquireSRWLockShared(&superblock->lock);
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/* check superblock for cached attributes */
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if (time(NULL) <= superblock->cache_expiration) {
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info.space_total = superblock->space_total;
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info.space_avail = superblock->space_avail;
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info.space_free = superblock->space_free;
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status = NO_ERROR;
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dprintf(2, "%s cached: %llu user, %llu free of %llu total\n",
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query, info.space_avail, info.space_free, info.space_total);
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}
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ReleaseSRWLockShared(&superblock->lock);
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if (status) {
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bitmap4 attr_request = { 2, { 0, FATTR4_WORD1_SPACE_AVAIL |
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FATTR4_WORD1_SPACE_FREE | FATTR4_WORD1_SPACE_TOTAL } };
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/* query the space_ attributes of the filesystem */
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status = nfs41_getattr(state->session, &state->file,
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&attr_request, &info);
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if (status) {
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eprintf("nfs41_getattr() failed with %s\n",
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nfs_error_string(status));
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status = nfs_to_windows_error(status, ERROR_BAD_NET_RESP);
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goto out;
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}
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AcquireSRWLockExclusive(&superblock->lock);
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superblock->space_total = info.space_total;
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superblock->space_avail = info.space_avail;
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superblock->space_free = info.space_free;
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superblock->cache_expiration = time(NULL) + VOLUME_CACHE_EXPIRATION;
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ReleaseSRWLockExclusive(&superblock->lock);
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dprintf(2, "%s: %llu user, %llu free of %llu total\n",
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query, info.space_avail, info.space_free, info.space_total);
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}
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if (total_out) *total_out = TO_UNITS(info.space_total);
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if (user_out) *user_out = TO_UNITS(info.space_avail);
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if (avail_out) *avail_out = TO_UNITS(info.space_free);
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out:
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return status;
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}
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static int handle_volume(nfs41_upcall *upcall)
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{
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volume_upcall_args *args = &upcall->args.volume;
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int status = NO_ERROR;
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switch (args->query) {
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case FileFsSizeInformation:
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args->len = sizeof(args->info.size);
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args->info.size.SectorsPerAllocationUnit = SECTORS_PER_UNIT;
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args->info.size.BytesPerSector = BYTES_PER_SECTOR;
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status = get_volume_size_info(upcall->state_ref,
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"FileFsSizeInformation",
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&args->info.size.TotalAllocationUnits.QuadPart,
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&args->info.size.AvailableAllocationUnits.QuadPart,
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NULL);
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break;
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case FileFsFullSizeInformation:
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args->len = sizeof(args->info.fullsize);
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args->info.fullsize.SectorsPerAllocationUnit = SECTORS_PER_UNIT;
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args->info.fullsize.BytesPerSector = BYTES_PER_SECTOR;
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status = get_volume_size_info(upcall->state_ref,
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"FileFsFullSizeInformation",
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&args->info.fullsize.TotalAllocationUnits.QuadPart,
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&args->info.fullsize.CallerAvailableAllocationUnits.QuadPart,
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&args->info.fullsize.ActualAvailableAllocationUnits.QuadPart);
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break;
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case FileFsAttributeInformation:
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args->len = sizeof(args->info.attribute);
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nfs41_superblock_fs_attributes(upcall->state_ref->file.fh.superblock,
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&args->info.attribute);
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break;
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default:
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eprintf("unhandled fs query class %d\n", args->query);
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status = ERROR_INVALID_PARAMETER;
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break;
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}
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return status;
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}
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static int marshall_volume(unsigned char *buffer, uint32_t *length, nfs41_upcall *upcall)
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{
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int status;
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volume_upcall_args *args = &upcall->args.volume;
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status = safe_write(&buffer, length, &args->len, sizeof(args->len));
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if (status) goto out;
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status = safe_write(&buffer, length, &args->info, args->len);
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out:
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return status;
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}
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const nfs41_upcall_op nfs41_op_volume = {
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parse_volume,
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handle_volume,
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marshall_volume
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};
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