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alistair23-linux/fs/afs/fsclient.c
David Howells 8c7ae38d1c afs: Fix StoreData op marshalling 
The marshalling of AFS.StoreData, AFS.StoreData64 and YFS.StoreData64 calls
generated by ->setattr() ops for the purpose of expanding a file is
incorrect due to older documentation incorrectly describing the way the RPC
'FileLength' parameter is meant to work.

The older documentation says that this is the length the file is meant to
end up at the end of the operation; however, it was never implemented this
way in any of the servers, but rather the file is truncated down to this
before the write operation is effected, and never expanded to it (and,
indeed, it was renamed to 'TruncPos' in 2014).

Fix this by setting the position parameter to the new file length and doing
a zero-lengh write there.

The bug causes Xwayland to SIGBUS due to unexpected non-expansion of a file
it then mmaps.  This can be tested by giving the following test program a
filename in an AFS directory:

	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>
	#include <fcntl.h>
	#include <sys/mman.h>
	int main(int argc, char *argv[])
	{
		char *p;
		int fd;
		if (argc != 2) {
			fprintf(stderr,
				"Format: test-trunc-mmap <file>\n");
			exit(2);
		}
		fd = open(argv[1], O_RDWR | O_CREAT | O_TRUNC);
		if (fd < 0) {
			perror(argv[1]);
			exit(1);
		}
		if (ftruncate(fd, 0x140008) == -1) {
			perror("ftruncate");
			exit(1);
		}
		p = mmap(NULL, 4096, PROT_READ | PROT_WRITE,
			 MAP_SHARED, fd, 0);
		if (p == MAP_FAILED) {
			perror("mmap");
			exit(1);
		}
		p[0] = 'a';
		if (munmap(p, 4096) < 0) {
			perror("munmap");
			exit(1);
		}
		if (close(fd) < 0) {
			perror("close");
			exit(1);
		}
		exit(0);
	}

Fixes: 31143d5d51 ("AFS: implement basic file write support")
Reported-by: Jonathan Billings <jsbillin@umich.edu>
Tested-by: Jonathan Billings <jsbillin@umich.edu>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-03-28 08:54:20 -07:00

2368 lines
57 KiB
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/* AFS File Server client stubs
*
* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* 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.
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/circ_buf.h>
#include <linux/iversion.h>
#include "internal.h"
#include "afs_fs.h"
#include "xdr_fs.h"
#include "protocol_yfs.h"
static const struct afs_fid afs_zero_fid;
static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
{
call->cbi = afs_get_cb_interest(cbi);
}
/*
* decode an AFSFid block
*/
static void xdr_decode_AFSFid(const __be32 **_bp, struct afs_fid *fid)
{
const __be32 *bp = *_bp;
fid->vid = ntohl(*bp++);
fid->vnode = ntohl(*bp++);
fid->unique = ntohl(*bp++);
*_bp = bp;
}
/*
* Dump a bad file status record.
*/
static void xdr_dump_bad(const __be32 *bp)
{
__be32 x[4];
int i;
pr_notice("AFS XDR: Bad status record\n");
for (i = 0; i < 5 * 4 * 4; i += 16) {
memcpy(x, bp, 16);
bp += 4;
pr_notice("%03x: %08x %08x %08x %08x\n",
i, ntohl(x[0]), ntohl(x[1]), ntohl(x[2]), ntohl(x[3]));
}
memcpy(x, bp, 4);
pr_notice("0x50: %08x\n", ntohl(x[0]));
}
/*
* Update the core inode struct from a returned status record.
*/
void afs_update_inode_from_status(struct afs_vnode *vnode,
struct afs_file_status *status,
const afs_dataversion_t *expected_version,
u8 flags)
{
struct timespec64 t;
umode_t mode;
t = status->mtime_client;
vnode->vfs_inode.i_ctime = t;
vnode->vfs_inode.i_mtime = t;
vnode->vfs_inode.i_atime = t;
if (flags & (AFS_VNODE_META_CHANGED | AFS_VNODE_NOT_YET_SET)) {
vnode->vfs_inode.i_uid = make_kuid(&init_user_ns, status->owner);
vnode->vfs_inode.i_gid = make_kgid(&init_user_ns, status->group);
set_nlink(&vnode->vfs_inode, status->nlink);
mode = vnode->vfs_inode.i_mode;
mode &= ~S_IALLUGO;
mode |= status->mode;
barrier();
vnode->vfs_inode.i_mode = mode;
}
if (!(flags & AFS_VNODE_NOT_YET_SET)) {
if (expected_version &&
*expected_version != status->data_version) {
_debug("vnode modified %llx on {%llx:%llu} [exp %llx]",
(unsigned long long) status->data_version,
vnode->fid.vid, vnode->fid.vnode,
(unsigned long long) *expected_version);
vnode->invalid_before = status->data_version;
if (vnode->status.type == AFS_FTYPE_DIR) {
if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
afs_stat_v(vnode, n_inval);
} else {
set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
}
} else if (vnode->status.type == AFS_FTYPE_DIR) {
/* Expected directory change is handled elsewhere so
* that we can locally edit the directory and save on a
* download.
*/
if (test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
flags &= ~AFS_VNODE_DATA_CHANGED;
}
}
if (flags & (AFS_VNODE_DATA_CHANGED | AFS_VNODE_NOT_YET_SET)) {
inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
i_size_write(&vnode->vfs_inode, status->size);
}
}
/*
* decode an AFSFetchStatus block
*/
static int xdr_decode_AFSFetchStatus(struct afs_call *call,
const __be32 **_bp,
struct afs_file_status *status,
struct afs_vnode *vnode,
const afs_dataversion_t *expected_version,
struct afs_read *read_req)
{
const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
u64 data_version, size;
u32 type, abort_code;
u8 flags = 0;
abort_code = ntohl(xdr->abort_code);
if (xdr->if_version != htonl(AFS_FSTATUS_VERSION)) {
if (xdr->if_version == htonl(0) &&
abort_code != 0 &&
inline_error) {
/* The OpenAFS fileserver has a bug in FS.InlineBulkStatus
* whereby it doesn't set the interface version in the error
* case.
*/
status->abort_code = abort_code;
return 0;
}
pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
goto bad;
}
if (abort_code != 0 && inline_error) {
status->abort_code = abort_code;
return 0;
}
type = ntohl(xdr->type);
switch (type) {
case AFS_FTYPE_FILE:
case AFS_FTYPE_DIR:
case AFS_FTYPE_SYMLINK:
if (type != status->type &&
vnode &&
!test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
pr_warning("Vnode %llx:%llx:%x changed type %u to %u\n",
vnode->fid.vid,
vnode->fid.vnode,
vnode->fid.unique,
status->type, type);
goto bad;
}
status->type = type;
break;
default:
goto bad;
}
#define EXTRACT_M(FIELD) \
do { \
u32 x = ntohl(xdr->FIELD); \
if (status->FIELD != x) { \
flags |= AFS_VNODE_META_CHANGED; \
status->FIELD = x; \
} \
} while (0)
EXTRACT_M(nlink);
EXTRACT_M(author);
EXTRACT_M(owner);
EXTRACT_M(caller_access); /* call ticket dependent */
EXTRACT_M(anon_access);
EXTRACT_M(mode);
EXTRACT_M(group);
status->mtime_client.tv_sec = ntohl(xdr->mtime_client);
status->mtime_client.tv_nsec = 0;
status->mtime_server.tv_sec = ntohl(xdr->mtime_server);
status->mtime_server.tv_nsec = 0;
status->lock_count = ntohl(xdr->lock_count);
size = (u64)ntohl(xdr->size_lo);
size |= (u64)ntohl(xdr->size_hi) << 32;
status->size = size;
data_version = (u64)ntohl(xdr->data_version_lo);
data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
if (data_version != status->data_version) {
status->data_version = data_version;
flags |= AFS_VNODE_DATA_CHANGED;
}
if (read_req) {
read_req->data_version = data_version;
read_req->file_size = size;
}
*_bp = (const void *)*_bp + sizeof(*xdr);
if (vnode) {
if (test_bit(AFS_VNODE_UNSET, &vnode->flags))
flags |= AFS_VNODE_NOT_YET_SET;
afs_update_inode_from_status(vnode, status, expected_version,
flags);
}
return 0;
bad:
xdr_dump_bad(*_bp);
return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
}
/*
* Decode the file status. We need to lock the target vnode if we're going to
* update its status so that stat() sees the attributes update atomically.
*/
static int afs_decode_status(struct afs_call *call,
const __be32 **_bp,
struct afs_file_status *status,
struct afs_vnode *vnode,
const afs_dataversion_t *expected_version,
struct afs_read *read_req)
{
int ret;
if (!vnode)
return xdr_decode_AFSFetchStatus(call, _bp, status, vnode,
expected_version, read_req);
write_seqlock(&vnode->cb_lock);
ret = xdr_decode_AFSFetchStatus(call, _bp, status, vnode,
expected_version, read_req);
write_sequnlock(&vnode->cb_lock);
return ret;
}
/*
* decode an AFSCallBack block
*/
static void xdr_decode_AFSCallBack(struct afs_call *call,
struct afs_vnode *vnode,
const __be32 **_bp)
{
struct afs_cb_interest *old, *cbi = call->cbi;
const __be32 *bp = *_bp;
u32 cb_expiry;
write_seqlock(&vnode->cb_lock);
if (!afs_cb_is_broken(call->cb_break, vnode, cbi)) {
vnode->cb_version = ntohl(*bp++);
cb_expiry = ntohl(*bp++);
vnode->cb_type = ntohl(*bp++);
vnode->cb_expires_at = cb_expiry + ktime_get_real_seconds();
old = vnode->cb_interest;
if (old != call->cbi) {
vnode->cb_interest = cbi;
cbi = old;
}
set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
} else {
bp += 3;
}
write_sequnlock(&vnode->cb_lock);
call->cbi = cbi;
*_bp = bp;
}
static ktime_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
{
return ktime_add_ns(call->reply_time, expiry * NSEC_PER_SEC);
}
static void xdr_decode_AFSCallBack_raw(struct afs_call *call,
const __be32 **_bp,
struct afs_callback *cb)
{
const __be32 *bp = *_bp;
cb->version = ntohl(*bp++);
cb->expires_at = xdr_decode_expiry(call, ntohl(*bp++));
cb->type = ntohl(*bp++);
*_bp = bp;
}
/*
* decode an AFSVolSync block
*/
static void xdr_decode_AFSVolSync(const __be32 **_bp,
struct afs_volsync *volsync)
{
const __be32 *bp = *_bp;
u32 creation;
creation = ntohl(*bp++);
bp++; /* spare2 */
bp++; /* spare3 */
bp++; /* spare4 */
bp++; /* spare5 */
bp++; /* spare6 */
*_bp = bp;
if (volsync)
volsync->creation = creation;
}
/*
* encode the requested attributes into an AFSStoreStatus block
*/
static void xdr_encode_AFS_StoreStatus(__be32 **_bp, struct iattr *attr)
{
__be32 *bp = *_bp;
u32 mask = 0, mtime = 0, owner = 0, group = 0, mode = 0;
mask = 0;
if (attr->ia_valid & ATTR_MTIME) {
mask |= AFS_SET_MTIME;
mtime = attr->ia_mtime.tv_sec;
}
if (attr->ia_valid & ATTR_UID) {
mask |= AFS_SET_OWNER;
owner = from_kuid(&init_user_ns, attr->ia_uid);
}
if (attr->ia_valid & ATTR_GID) {
mask |= AFS_SET_GROUP;
group = from_kgid(&init_user_ns, attr->ia_gid);
}
if (attr->ia_valid & ATTR_MODE) {
mask |= AFS_SET_MODE;
mode = attr->ia_mode & S_IALLUGO;
}
*bp++ = htonl(mask);
*bp++ = htonl(mtime);
*bp++ = htonl(owner);
*bp++ = htonl(group);
*bp++ = htonl(mode);
*bp++ = 0; /* segment size */
*_bp = bp;
}
/*
* decode an AFSFetchVolumeStatus block
*/
static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
struct afs_volume_status *vs)
{
const __be32 *bp = *_bp;
vs->vid = ntohl(*bp++);
vs->parent_id = ntohl(*bp++);
vs->online = ntohl(*bp++);
vs->in_service = ntohl(*bp++);
vs->blessed = ntohl(*bp++);
vs->needs_salvage = ntohl(*bp++);
vs->type = ntohl(*bp++);
vs->min_quota = ntohl(*bp++);
vs->max_quota = ntohl(*bp++);
vs->blocks_in_use = ntohl(*bp++);
vs->part_blocks_avail = ntohl(*bp++);
vs->part_max_blocks = ntohl(*bp++);
vs->vol_copy_date = 0;
vs->vol_backup_date = 0;
*_bp = bp;
}
/*
* deliver reply data to an FS.FetchStatus
*/
static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
_enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = afs_decode_status(call, &bp, &vnode->status, vnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
xdr_decode_AFSCallBack(call, vnode, &bp);
xdr_decode_AFSVolSync(&bp, call->reply[1]);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.FetchStatus operation type
*/
static const struct afs_call_type afs_RXFSFetchStatus_vnode = {
.name = "FS.FetchStatus(vnode)",
.op = afs_FS_FetchStatus,
.deliver = afs_deliver_fs_fetch_status_vnode,
.destructor = afs_flat_call_destructor,
};
/*
* fetch the status information for a file
*/
int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsync,
bool new_inode)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_fetch_file_status(fc, volsync, new_inode);
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus_vnode,
16, (21 + 3 + 6) * 4);
if (!call) {
fc->ac.error = -ENOMEM;
return -ENOMEM;
}
call->key = fc->key;
call->reply[0] = vnode;
call->reply[1] = volsync;
call->expected_version = new_inode ? 1 : vnode->status.data_version;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHSTATUS);
bp[1] = htonl(vnode->fid.vid);
bp[2] = htonl(vnode->fid.vnode);
bp[3] = htonl(vnode->fid.unique);
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.FetchData
*/
static int afs_deliver_fs_fetch_data(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
struct afs_read *req = call->reply[2];
const __be32 *bp;
unsigned int size;
int ret;
_enter("{%u,%zu/%llu}",
call->unmarshall, iov_iter_count(&call->iter), req->actual_len);
switch (call->unmarshall) {
case 0:
req->actual_len = 0;
req->index = 0;
req->offset = req->pos & (PAGE_SIZE - 1);
call->unmarshall++;
if (call->operation_ID == FSFETCHDATA64) {
afs_extract_to_tmp64(call);
} else {
call->tmp_u = htonl(0);
afs_extract_to_tmp(call);
}
/* extract the returned data length */
case 1:
_debug("extract data length");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
req->actual_len = be64_to_cpu(call->tmp64);
_debug("DATA length: %llu", req->actual_len);
req->remain = min(req->len, req->actual_len);
if (req->remain == 0)
goto no_more_data;
call->unmarshall++;
begin_page:
ASSERTCMP(req->index, <, req->nr_pages);
if (req->remain > PAGE_SIZE - req->offset)
size = PAGE_SIZE - req->offset;
else
size = req->remain;
call->bvec[0].bv_len = size;
call->bvec[0].bv_offset = req->offset;
call->bvec[0].bv_page = req->pages[req->index];
iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
ASSERTCMP(size, <=, PAGE_SIZE);
/* extract the returned data */
case 2:
_debug("extract data %zu/%llu",
iov_iter_count(&call->iter), req->remain);
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
req->remain -= call->bvec[0].bv_len;
req->offset += call->bvec[0].bv_len;
ASSERTCMP(req->offset, <=, PAGE_SIZE);
if (req->offset == PAGE_SIZE) {
req->offset = 0;
if (req->page_done)
req->page_done(call, req);
req->index++;
if (req->remain > 0)
goto begin_page;
}
ASSERTCMP(req->remain, ==, 0);
if (req->actual_len <= req->len)
goto no_more_data;
/* Discard any excess data the server gave us */
iov_iter_discard(&call->iter, READ, req->actual_len - req->len);
call->unmarshall = 3;
case 3:
_debug("extract discard %zu/%llu",
iov_iter_count(&call->iter), req->actual_len - req->len);
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
no_more_data:
call->unmarshall = 4;
afs_extract_to_buf(call, (21 + 3 + 6) * 4);
/* extract the metadata */
case 4:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
ret = afs_decode_status(call, &bp, &vnode->status, vnode,
&vnode->status.data_version, req);
if (ret < 0)
return ret;
xdr_decode_AFSCallBack(call, vnode, &bp);
xdr_decode_AFSVolSync(&bp, call->reply[1]);
call->unmarshall++;
case 5:
break;
}
for (; req->index < req->nr_pages; req->index++) {
if (req->offset < PAGE_SIZE)
zero_user_segment(req->pages[req->index],
req->offset, PAGE_SIZE);
if (req->page_done)
req->page_done(call, req);
req->offset = 0;
}
_leave(" = 0 [done]");
return 0;
}
static void afs_fetch_data_destructor(struct afs_call *call)
{
struct afs_read *req = call->reply[2];
afs_put_read(req);
afs_flat_call_destructor(call);
}
/*
* FS.FetchData operation type
*/
static const struct afs_call_type afs_RXFSFetchData = {
.name = "FS.FetchData",
.op = afs_FS_FetchData,
.deliver = afs_deliver_fs_fetch_data,
.destructor = afs_fetch_data_destructor,
};
static const struct afs_call_type afs_RXFSFetchData64 = {
.name = "FS.FetchData64",
.op = afs_FS_FetchData64,
.deliver = afs_deliver_fs_fetch_data,
.destructor = afs_fetch_data_destructor,
};
/*
* fetch data from a very large file
*/
static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
call->reply[1] = NULL; /* volsync */
call->reply[2] = req;
call->expected_version = vnode->status.data_version;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHDATA64);
bp[1] = htonl(vnode->fid.vid);
bp[2] = htonl(vnode->fid.vnode);
bp[3] = htonl(vnode->fid.unique);
bp[4] = htonl(upper_32_bits(req->pos));
bp[5] = htonl(lower_32_bits(req->pos));
bp[6] = 0;
bp[7] = htonl(lower_32_bits(req->len));
refcount_inc(&req->usage);
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* fetch data from a file
*/
int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_fetch_data(fc, req);
if (upper_32_bits(req->pos) ||
upper_32_bits(req->len) ||
upper_32_bits(req->pos + req->len))
return afs_fs_fetch_data64(fc, req);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
call->reply[1] = NULL; /* volsync */
call->reply[2] = req;
call->expected_version = vnode->status.data_version;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHDATA);
bp[1] = htonl(vnode->fid.vid);
bp[2] = htonl(vnode->fid.vnode);
bp[3] = htonl(vnode->fid.unique);
bp[4] = htonl(lower_32_bits(req->pos));
bp[5] = htonl(lower_32_bits(req->len));
refcount_inc(&req->usage);
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.CreateFile or an FS.MakeDir
*/
static int afs_deliver_fs_create_vnode(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFid(&bp, call->reply[1]);
ret = afs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL);
if (ret < 0)
return ret;
ret = afs_decode_status(call, &bp, &vnode->status, vnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
xdr_decode_AFSCallBack_raw(call, &bp, call->reply[3]);
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
return 0;
}
/*
* FS.CreateFile and FS.MakeDir operation type
*/
static const struct afs_call_type afs_RXFSCreateFile = {
.name = "FS.CreateFile",
.op = afs_FS_CreateFile,
.deliver = afs_deliver_fs_create_vnode,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSMakeDir = {
.name = "FS.MakeDir",
.op = afs_FS_MakeDir,
.deliver = afs_deliver_fs_create_vnode,
.destructor = afs_flat_call_destructor,
};
/*
* create a file or make a directory
*/
int afs_fs_create(struct afs_fs_cursor *fc,
const char *name,
umode_t mode,
u64 current_data_version,
struct afs_fid *newfid,
struct afs_file_status *newstatus,
struct afs_callback *newcb)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
size_t namesz, reqsz, padsz;
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)){
if (S_ISDIR(mode))
return yfs_fs_make_dir(fc, name, mode, current_data_version,
newfid, newstatus, newcb);
else
return yfs_fs_create_file(fc, name, mode, current_data_version,
newfid, newstatus, newcb);
}
_enter("");
namesz = strlen(name);
padsz = (4 - (namesz & 3)) & 3;
reqsz = (5 * 4) + namesz + padsz + (6 * 4);
call = afs_alloc_flat_call(
net, S_ISDIR(mode) ? &afs_RXFSMakeDir : &afs_RXFSCreateFile,
reqsz, (3 + 21 + 21 + 3 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
call->reply[1] = newfid;
call->reply[2] = newstatus;
call->reply[3] = newcb;
call->expected_version = current_data_version + 1;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = htonl(mode & S_IALLUGO); /* unix mode */
*bp++ = 0; /* segment size */
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.RemoveFile or FS.RemoveDir
*/
static int afs_deliver_fs_remove(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = afs_decode_status(call, &bp, &vnode->status, vnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
return 0;
}
/*
* FS.RemoveDir/FS.RemoveFile operation type
*/
static const struct afs_call_type afs_RXFSRemoveFile = {
.name = "FS.RemoveFile",
.op = afs_FS_RemoveFile,
.deliver = afs_deliver_fs_remove,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSRemoveDir = {
.name = "FS.RemoveDir",
.op = afs_FS_RemoveDir,
.deliver = afs_deliver_fs_remove,
.destructor = afs_flat_call_destructor,
};
/*
* remove a file or directory
*/
int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
const char *name, bool isdir, u64 current_data_version)
{
struct afs_vnode *dvnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(dvnode);
size_t namesz, reqsz, padsz;
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_remove(fc, vnode, name, isdir, current_data_version);
_enter("");
namesz = strlen(name);
padsz = (4 - (namesz & 3)) & 3;
reqsz = (5 * 4) + namesz + padsz;
call = afs_alloc_flat_call(
net, isdir ? &afs_RXFSRemoveDir : &afs_RXFSRemoveFile,
reqsz, (21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = dvnode;
call->reply[1] = vnode;
call->expected_version = current_data_version + 1;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(isdir ? FSREMOVEDIR : FSREMOVEFILE);
*bp++ = htonl(dvnode->fid.vid);
*bp++ = htonl(dvnode->fid.vnode);
*bp++ = htonl(dvnode->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &dvnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.Link
*/
static int afs_deliver_fs_link(struct afs_call *call)
{
struct afs_vnode *dvnode = call->reply[0], *vnode = call->reply[1];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = afs_decode_status(call, &bp, &vnode->status, vnode, NULL, NULL);
if (ret < 0)
return ret;
ret = afs_decode_status(call, &bp, &dvnode->status, dvnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
return 0;
}
/*
* FS.Link operation type
*/
static const struct afs_call_type afs_RXFSLink = {
.name = "FS.Link",
.op = afs_FS_Link,
.deliver = afs_deliver_fs_link,
.destructor = afs_flat_call_destructor,
};
/*
* make a hard link
*/
int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
const char *name, u64 current_data_version)
{
struct afs_vnode *dvnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
size_t namesz, reqsz, padsz;
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_link(fc, vnode, name, current_data_version);
_enter("");
namesz = strlen(name);
padsz = (4 - (namesz & 3)) & 3;
reqsz = (5 * 4) + namesz + padsz + (3 * 4);
call = afs_alloc_flat_call(net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = dvnode;
call->reply[1] = vnode;
call->expected_version = current_data_version + 1;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSLINK);
*bp++ = htonl(dvnode->fid.vid);
*bp++ = htonl(dvnode->fid.vnode);
*bp++ = htonl(dvnode->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.Symlink
*/
static int afs_deliver_fs_symlink(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
xdr_decode_AFSFid(&bp, call->reply[1]);
ret = afs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL);
if (ret < 0)
return ret;
ret = afs_decode_status(call, &bp, &vnode->status, vnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
return 0;
}
/*
* FS.Symlink operation type
*/
static const struct afs_call_type afs_RXFSSymlink = {
.name = "FS.Symlink",
.op = afs_FS_Symlink,
.deliver = afs_deliver_fs_symlink,
.destructor = afs_flat_call_destructor,
};
/*
* create a symbolic link
*/
int afs_fs_symlink(struct afs_fs_cursor *fc,
const char *name,
const char *contents,
u64 current_data_version,
struct afs_fid *newfid,
struct afs_file_status *newstatus)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
size_t namesz, reqsz, padsz, c_namesz, c_padsz;
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_symlink(fc, name, contents, current_data_version,
newfid, newstatus);
_enter("");
namesz = strlen(name);
padsz = (4 - (namesz & 3)) & 3;
c_namesz = strlen(contents);
c_padsz = (4 - (c_namesz & 3)) & 3;
reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
call = afs_alloc_flat_call(net, &afs_RXFSSymlink, reqsz,
(3 + 21 + 21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
call->reply[1] = newfid;
call->reply[2] = newstatus;
call->expected_version = current_data_version + 1;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSYMLINK);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
*bp++ = htonl(namesz);
memcpy(bp, name, namesz);
bp = (void *) bp + namesz;
if (padsz > 0) {
memset(bp, 0, padsz);
bp = (void *) bp + padsz;
}
*bp++ = htonl(c_namesz);
memcpy(bp, contents, c_namesz);
bp = (void *) bp + c_namesz;
if (c_padsz > 0) {
memset(bp, 0, c_padsz);
bp = (void *) bp + c_padsz;
}
*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = htonl(S_IRWXUGO); /* unix mode */
*bp++ = 0; /* segment size */
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.Rename
*/
static int afs_deliver_fs_rename(struct afs_call *call)
{
struct afs_vnode *orig_dvnode = call->reply[0], *new_dvnode = call->reply[1];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = afs_decode_status(call, &bp, &orig_dvnode->status, orig_dvnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
if (new_dvnode != orig_dvnode) {
ret = afs_decode_status(call, &bp, &new_dvnode->status, new_dvnode,
&call->expected_version_2, NULL);
if (ret < 0)
return ret;
}
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
return 0;
}
/*
* FS.Rename operation type
*/
static const struct afs_call_type afs_RXFSRename = {
.name = "FS.Rename",
.op = afs_FS_Rename,
.deliver = afs_deliver_fs_rename,
.destructor = afs_flat_call_destructor,
};
/*
* create a symbolic link
*/
int afs_fs_rename(struct afs_fs_cursor *fc,
const char *orig_name,
struct afs_vnode *new_dvnode,
const char *new_name,
u64 current_orig_data_version,
u64 current_new_data_version)
{
struct afs_vnode *orig_dvnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(orig_dvnode);
size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_rename(fc, orig_name,
new_dvnode, new_name,
current_orig_data_version,
current_new_data_version);
_enter("");
o_namesz = strlen(orig_name);
o_padsz = (4 - (o_namesz & 3)) & 3;
n_namesz = strlen(new_name);
n_padsz = (4 - (n_namesz & 3)) & 3;
reqsz = (4 * 4) +
4 + o_namesz + o_padsz +
(3 * 4) +
4 + n_namesz + n_padsz;
call = afs_alloc_flat_call(net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = orig_dvnode;
call->reply[1] = new_dvnode;
call->expected_version = current_orig_data_version + 1;
call->expected_version_2 = current_new_data_version + 1;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSRENAME);
*bp++ = htonl(orig_dvnode->fid.vid);
*bp++ = htonl(orig_dvnode->fid.vnode);
*bp++ = htonl(orig_dvnode->fid.unique);
*bp++ = htonl(o_namesz);
memcpy(bp, orig_name, o_namesz);
bp = (void *) bp + o_namesz;
if (o_padsz > 0) {
memset(bp, 0, o_padsz);
bp = (void *) bp + o_padsz;
}
*bp++ = htonl(new_dvnode->fid.vid);
*bp++ = htonl(new_dvnode->fid.vnode);
*bp++ = htonl(new_dvnode->fid.unique);
*bp++ = htonl(n_namesz);
memcpy(bp, new_name, n_namesz);
bp = (void *) bp + n_namesz;
if (n_padsz > 0) {
memset(bp, 0, n_padsz);
bp = (void *) bp + n_padsz;
}
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &orig_dvnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.StoreData
*/
static int afs_deliver_fs_store_data(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
int ret;
_enter("");
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = afs_decode_status(call, &bp, &vnode->status, vnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
afs_pages_written_back(vnode, call);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.StoreData operation type
*/
static const struct afs_call_type afs_RXFSStoreData = {
.name = "FS.StoreData",
.op = afs_FS_StoreData,
.deliver = afs_deliver_fs_store_data,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSStoreData64 = {
.name = "FS.StoreData64",
.op = afs_FS_StoreData64,
.deliver = afs_deliver_fs_store_data,
.destructor = afs_flat_call_destructor,
};
/*
* store a set of pages to a very large file
*/
static int afs_fs_store_data64(struct afs_fs_cursor *fc,
struct address_space *mapping,
pgoff_t first, pgoff_t last,
unsigned offset, unsigned to,
loff_t size, loff_t pos, loff_t i_size)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
call = afs_alloc_flat_call(net, &afs_RXFSStoreData64,
(4 + 6 + 3 * 2) * 4,
(21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->mapping = mapping;
call->reply[0] = vnode;
call->first = first;
call->last = last;
call->first_offset = offset;
call->last_to = to;
call->send_pages = true;
call->expected_version = vnode->status.data_version + 1;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTOREDATA64);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
*bp++ = htonl(AFS_SET_MTIME); /* mask */
*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = 0; /* unix mode */
*bp++ = 0; /* segment size */
*bp++ = htonl(pos >> 32);
*bp++ = htonl((u32) pos);
*bp++ = htonl(size >> 32);
*bp++ = htonl((u32) size);
*bp++ = htonl(i_size >> 32);
*bp++ = htonl((u32) i_size);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* store a set of pages
*/
int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
pgoff_t first, pgoff_t last,
unsigned offset, unsigned to)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
loff_t size, pos, i_size;
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_store_data(fc, mapping, first, last, offset, to);
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
size = (loff_t)to - (loff_t)offset;
if (first != last)
size += (loff_t)(last - first) << PAGE_SHIFT;
pos = (loff_t)first << PAGE_SHIFT;
pos += offset;
i_size = i_size_read(&vnode->vfs_inode);
if (pos + size > i_size)
i_size = size + pos;
_debug("size %llx, at %llx, i_size %llx",
(unsigned long long) size, (unsigned long long) pos,
(unsigned long long) i_size);
if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
return afs_fs_store_data64(fc, mapping, first, last, offset, to,
size, pos, i_size);
call = afs_alloc_flat_call(net, &afs_RXFSStoreData,
(4 + 6 + 3) * 4,
(21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->mapping = mapping;
call->reply[0] = vnode;
call->first = first;
call->last = last;
call->first_offset = offset;
call->last_to = to;
call->send_pages = true;
call->expected_version = vnode->status.data_version + 1;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTOREDATA);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
*bp++ = htonl(AFS_SET_MTIME); /* mask */
*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
*bp++ = 0; /* owner */
*bp++ = 0; /* group */
*bp++ = 0; /* unix mode */
*bp++ = 0; /* segment size */
*bp++ = htonl(pos);
*bp++ = htonl(size);
*bp++ = htonl(i_size);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.StoreStatus
*/
static int afs_deliver_fs_store_status(struct afs_call *call)
{
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
int ret;
_enter("");
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = afs_decode_status(call, &bp, &vnode->status, vnode,
&call->expected_version, NULL);
if (ret < 0)
return ret;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
return 0;
}
/*
* FS.StoreStatus operation type
*/
static const struct afs_call_type afs_RXFSStoreStatus = {
.name = "FS.StoreStatus",
.op = afs_FS_StoreStatus,
.deliver = afs_deliver_fs_store_status,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSStoreData_as_Status = {
.name = "FS.StoreData",
.op = afs_FS_StoreData,
.deliver = afs_deliver_fs_store_status,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
.name = "FS.StoreData64",
.op = afs_FS_StoreData64,
.deliver = afs_deliver_fs_store_status,
.destructor = afs_flat_call_destructor,
};
/*
* set the attributes on a very large file, using FS.StoreData rather than
* FS.StoreStatus so as to alter the file size also
*/
static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
ASSERT(attr->ia_valid & ATTR_SIZE);
call = afs_alloc_flat_call(net, &afs_RXFSStoreData64_as_Status,
(4 + 6 + 3 * 2) * 4,
(21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
call->expected_version = vnode->status.data_version + 1;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTOREDATA64);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
xdr_encode_AFS_StoreStatus(&bp, attr);
*bp++ = htonl(attr->ia_size >> 32); /* position of start of write */
*bp++ = htonl((u32) attr->ia_size);
*bp++ = 0; /* size of write */
*bp++ = 0;
*bp++ = htonl(attr->ia_size >> 32); /* new file length */
*bp++ = htonl((u32) attr->ia_size);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
* so as to alter the file size also
*/
static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
ASSERT(attr->ia_valid & ATTR_SIZE);
if (attr->ia_size >> 32)
return afs_fs_setattr_size64(fc, attr);
call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status,
(4 + 6 + 3) * 4,
(21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
call->expected_version = vnode->status.data_version + 1;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTOREDATA);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
xdr_encode_AFS_StoreStatus(&bp, attr);
*bp++ = htonl(attr->ia_size); /* position of start of write */
*bp++ = 0; /* size of write */
*bp++ = htonl(attr->ia_size); /* new file length */
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* set the attributes on a file, using FS.StoreData if there's a change in file
* size, and FS.StoreStatus otherwise
*/
int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_setattr(fc, attr);
if (attr->ia_valid & ATTR_SIZE)
return afs_fs_setattr_size(fc, attr);
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
call = afs_alloc_flat_call(net, &afs_RXFSStoreStatus,
(4 + 6) * 4,
(21 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
call->expected_version = vnode->status.data_version;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSTORESTATUS);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
xdr_encode_AFS_StoreStatus(&bp, attr);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.GetVolumeStatus
*/
static int afs_deliver_fs_get_volume_status(struct afs_call *call)
{
const __be32 *bp;
char *p;
u32 size;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
call->unmarshall++;
afs_extract_to_buf(call, 12 * 4);
/* extract the returned status record */
case 1:
_debug("extract status");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_AFSFetchVolumeStatus(&bp, call->reply[1]);
call->unmarshall++;
afs_extract_to_tmp(call);
/* extract the volume name length */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
call->count = ntohl(call->tmp);
_debug("volname length: %u", call->count);
if (call->count >= AFSNAMEMAX)
return afs_protocol_error(call, -EBADMSG,
afs_eproto_volname_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_begin(call, call->reply[2], size);
call->unmarshall++;
/* extract the volume name */
case 3:
_debug("extract volname");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
p = call->reply[2];
p[call->count] = 0;
_debug("volname '%s'", p);
afs_extract_to_tmp(call);
call->unmarshall++;
/* extract the offline message length */
case 4:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
call->count = ntohl(call->tmp);
_debug("offline msg length: %u", call->count);
if (call->count >= AFSNAMEMAX)
return afs_protocol_error(call, -EBADMSG,
afs_eproto_offline_msg_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_begin(call, call->reply[2], size);
call->unmarshall++;
/* extract the offline message */
case 5:
_debug("extract offline");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
p = call->reply[2];
p[call->count] = 0;
_debug("offline '%s'", p);
afs_extract_to_tmp(call);
call->unmarshall++;
/* extract the message of the day length */
case 6:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
call->count = ntohl(call->tmp);
_debug("motd length: %u", call->count);
if (call->count >= AFSNAMEMAX)
return afs_protocol_error(call, -EBADMSG,
afs_eproto_motd_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_begin(call, call->reply[2], size);
call->unmarshall++;
/* extract the message of the day */
case 7:
_debug("extract motd");
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
p = call->reply[2];
p[call->count] = 0;
_debug("motd '%s'", p);
call->unmarshall++;
case 8:
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* destroy an FS.GetVolumeStatus call
*/
static void afs_get_volume_status_call_destructor(struct afs_call *call)
{
kfree(call->reply[2]);
call->reply[2] = NULL;
afs_flat_call_destructor(call);
}
/*
* FS.GetVolumeStatus operation type
*/
static const struct afs_call_type afs_RXFSGetVolumeStatus = {
.name = "FS.GetVolumeStatus",
.op = afs_FS_GetVolumeStatus,
.deliver = afs_deliver_fs_get_volume_status,
.destructor = afs_get_volume_status_call_destructor,
};
/*
* fetch the status of a volume
*/
int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
struct afs_volume_status *vs)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
void *tmpbuf;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_get_volume_status(fc, vs);
_enter("");
tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
if (!tmpbuf)
return -ENOMEM;
call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
if (!call) {
kfree(tmpbuf);
return -ENOMEM;
}
call->key = fc->key;
call->reply[0] = vnode;
call->reply[1] = vs;
call->reply[2] = tmpbuf;
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSGETVOLUMESTATUS);
bp[1] = htonl(vnode->fid.vid);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* deliver reply data to an FS.SetLock, FS.ExtendLock or FS.ReleaseLock
*/
static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
{
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
_leave(" = 0 [done]");
return 0;
}
/*
* FS.SetLock operation type
*/
static const struct afs_call_type afs_RXFSSetLock = {
.name = "FS.SetLock",
.op = afs_FS_SetLock,
.deliver = afs_deliver_fs_xxxx_lock,
.destructor = afs_flat_call_destructor,
};
/*
* FS.ExtendLock operation type
*/
static const struct afs_call_type afs_RXFSExtendLock = {
.name = "FS.ExtendLock",
.op = afs_FS_ExtendLock,
.deliver = afs_deliver_fs_xxxx_lock,
.destructor = afs_flat_call_destructor,
};
/*
* FS.ReleaseLock operation type
*/
static const struct afs_call_type afs_RXFSReleaseLock = {
.name = "FS.ReleaseLock",
.op = afs_FS_ReleaseLock,
.deliver = afs_deliver_fs_xxxx_lock,
.destructor = afs_flat_call_destructor,
};
/*
* Set a lock on a file
*/
int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_set_lock(fc, type);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSETLOCK);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
*bp++ = htonl(type);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* extend a lock on a file
*/
int afs_fs_extend_lock(struct afs_fs_cursor *fc)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_extend_lock(fc);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSEXTENDLOCK);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* release a lock on a file
*/
int afs_fs_release_lock(struct afs_fs_cursor *fc)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_release_lock(fc);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->reply[0] = vnode;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSRELEASELOCK);
*bp++ = htonl(vnode->fid.vid);
*bp++ = htonl(vnode->fid.vnode);
*bp++ = htonl(vnode->fid.unique);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* Deliver reply data to an FS.GiveUpAllCallBacks operation.
*/
static int afs_deliver_fs_give_up_all_callbacks(struct afs_call *call)
{
return afs_transfer_reply(call);
}
/*
* FS.GiveUpAllCallBacks operation type
*/
static const struct afs_call_type afs_RXFSGiveUpAllCallBacks = {
.name = "FS.GiveUpAllCallBacks",
.op = afs_FS_GiveUpAllCallBacks,
.deliver = afs_deliver_fs_give_up_all_callbacks,
.destructor = afs_flat_call_destructor,
};
/*
* Flush all the callbacks we have on a server.
*/
int afs_fs_give_up_all_callbacks(struct afs_net *net,
struct afs_server *server,
struct afs_addr_cursor *ac,
struct key *key)
{
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSGiveUpAllCallBacks, 1 * 4, 0);
if (!call)
return -ENOMEM;
call->key = key;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSGIVEUPALLCALLBACKS);
/* Can't take a ref on server */
return afs_make_call(ac, call, GFP_NOFS, false);
}
/*
* Deliver reply data to an FS.GetCapabilities operation.
*/
static int afs_deliver_fs_get_capabilities(struct afs_call *call)
{
u32 count;
int ret;
_enter("{%u,%zu}", call->unmarshall, iov_iter_count(&call->iter));
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* Extract the capabilities word count */
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
count = ntohl(call->tmp);
call->count = count;
call->count2 = count;
iov_iter_discard(&call->iter, READ, count * sizeof(__be32));
call->unmarshall++;
/* Extract capabilities words */
case 2:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
/* TODO: Examine capabilities */
call->unmarshall++;
break;
}
_leave(" = 0 [done]");
return 0;
}
static void afs_destroy_fs_get_capabilities(struct afs_call *call)
{
struct afs_server *server = call->reply[0];
afs_put_server(call->net, server);
afs_flat_call_destructor(call);
}
/*
* FS.GetCapabilities operation type
*/
static const struct afs_call_type afs_RXFSGetCapabilities = {
.name = "FS.GetCapabilities",
.op = afs_FS_GetCapabilities,
.deliver = afs_deliver_fs_get_capabilities,
.done = afs_fileserver_probe_result,
.destructor = afs_destroy_fs_get_capabilities,
};
/*
* Probe a fileserver for the capabilities that it supports. This can
* return up to 196 words.
*/
int afs_fs_get_capabilities(struct afs_net *net,
struct afs_server *server,
struct afs_addr_cursor *ac,
struct key *key,
unsigned int server_index,
bool async)
{
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
if (!call)
return -ENOMEM;
call->key = key;
call->reply[0] = afs_get_server(server);
call->reply[1] = (void *)(long)server_index;
call->upgrade = true;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSGETCAPABILITIES);
/* Can't take a ref on server */
trace_afs_make_fs_call(call, NULL);
return afs_make_call(ac, call, GFP_NOFS, async);
}
/*
* Deliver reply data to an FS.FetchStatus with no vnode.
*/
static int afs_deliver_fs_fetch_status(struct afs_call *call)
{
struct afs_file_status *status = call->reply[1];
struct afs_callback *callback = call->reply[2];
struct afs_volsync *volsync = call->reply[3];
struct afs_fid *fid = call->reply[0];
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
_enter("{%llx:%llu}", fid->vid, fid->vnode);
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = afs_decode_status(call, &bp, status, NULL,
&call->expected_version, NULL);
if (ret < 0)
return ret;
xdr_decode_AFSCallBack_raw(call, &bp, callback);
xdr_decode_AFSVolSync(&bp, volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.FetchStatus operation type
*/
static const struct afs_call_type afs_RXFSFetchStatus = {
.name = "FS.FetchStatus",
.op = afs_FS_FetchStatus,
.deliver = afs_deliver_fs_fetch_status,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the status information for a fid without needing a vnode handle.
*/
int afs_fs_fetch_status(struct afs_fs_cursor *fc,
struct afs_net *net,
struct afs_fid *fid,
struct afs_file_status *status,
struct afs_callback *callback,
struct afs_volsync *volsync)
{
struct afs_call *call;
__be32 *bp;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_fetch_status(fc, net, fid, status, callback, volsync);
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), fid->vid, fid->vnode);
call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
if (!call) {
fc->ac.error = -ENOMEM;
return -ENOMEM;
}
call->key = fc->key;
call->reply[0] = fid;
call->reply[1] = status;
call->reply[2] = callback;
call->reply[3] = volsync;
call->expected_version = 1; /* vnode->status.data_version */
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHSTATUS);
bp[1] = htonl(fid->vid);
bp[2] = htonl(fid->vnode);
bp[3] = htonl(fid->unique);
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, fid);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
/*
* Deliver reply data to an FS.InlineBulkStatus call
*/
static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
{
struct afs_file_status *statuses;
struct afs_callback *callbacks;
struct afs_vnode *vnode = call->reply[0];
const __be32 *bp;
u32 tmp;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* Extract the file status count and array in two steps */
case 1:
_debug("extract status count");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
tmp = ntohl(call->tmp);
_debug("status count: %u/%u", tmp, call->count2);
if (tmp != call->count2)
return afs_protocol_error(call, -EBADMSG,
afs_eproto_ibulkst_count);
call->count = 0;
call->unmarshall++;
more_counts:
afs_extract_to_buf(call, 21 * sizeof(__be32));
case 2:
_debug("extract status array %u", call->count);
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
bp = call->buffer;
statuses = call->reply[1];
ret = afs_decode_status(call, &bp, &statuses[call->count],
call->count == 0 ? vnode : NULL,
NULL, NULL);
if (ret < 0)
return ret;
call->count++;
if (call->count < call->count2)
goto more_counts;
call->count = 0;
call->unmarshall++;
afs_extract_to_tmp(call);
/* Extract the callback count and array in two steps */
case 3:
_debug("extract CB count");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
tmp = ntohl(call->tmp);
_debug("CB count: %u", tmp);
if (tmp != call->count2)
return afs_protocol_error(call, -EBADMSG,
afs_eproto_ibulkst_cb_count);
call->count = 0;
call->unmarshall++;
more_cbs:
afs_extract_to_buf(call, 3 * sizeof(__be32));
case 4:
_debug("extract CB array");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
_debug("unmarshall CB array");
bp = call->buffer;
callbacks = call->reply[2];
callbacks[call->count].version = ntohl(bp[0]);
callbacks[call->count].expires_at = xdr_decode_expiry(call, ntohl(bp[1]));
callbacks[call->count].type = ntohl(bp[2]);
statuses = call->reply[1];
if (call->count == 0 && vnode && statuses[0].abort_code == 0)
xdr_decode_AFSCallBack(call, vnode, &bp);
call->count++;
if (call->count < call->count2)
goto more_cbs;
afs_extract_to_buf(call, 6 * sizeof(__be32));
call->unmarshall++;
case 5:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_AFSVolSync(&bp, call->reply[3]);
call->unmarshall++;
case 6:
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* FS.InlineBulkStatus operation type
*/
static const struct afs_call_type afs_RXFSInlineBulkStatus = {
.name = "FS.InlineBulkStatus",
.op = afs_FS_InlineBulkStatus,
.deliver = afs_deliver_fs_inline_bulk_status,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the status information for up to 50 files
*/
int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
struct afs_net *net,
struct afs_fid *fids,
struct afs_file_status *statuses,
struct afs_callback *callbacks,
unsigned int nr_fids,
struct afs_volsync *volsync)
{
struct afs_call *call;
__be32 *bp;
int i;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_inline_bulk_status(fc, net, fids, statuses, callbacks,
nr_fids, volsync);
_enter(",%x,{%llx:%llu},%u",
key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
call = afs_alloc_flat_call(net, &afs_RXFSInlineBulkStatus,
(2 + nr_fids * 3) * 4,
21 * 4);
if (!call) {
fc->ac.error = -ENOMEM;
return -ENOMEM;
}
call->key = fc->key;
call->reply[0] = NULL; /* vnode for fid[0] */
call->reply[1] = statuses;
call->reply[2] = callbacks;
call->reply[3] = volsync;
call->count2 = nr_fids;
call->want_reply_time = true;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSINLINEBULKSTATUS);
*bp++ = htonl(nr_fids);
for (i = 0; i < nr_fids; i++) {
*bp++ = htonl(fids[i].vid);
*bp++ = htonl(fids[i].vnode);
*bp++ = htonl(fids[i].unique);
}
call->cb_break = fc->cb_break;
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &fids[0]);
return afs_make_call(&fc->ac, call, GFP_NOFS, false);
}
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