linux/fs/afs/fsclient.c
David Howells 3e0d9892c0 afs: Fix decoding of inline abort codes from version 1 status records
If we're decoding an AFSFetchStatus record and we see that the version is 1
and the abort code is set and we're expecting inline errors, then we store
the abort code and ignore the remaining status record (which is correct),
but we don't set the flag to say we got a valid abort code.

This can affect operation of YFS.RemoveFile2 when removing a file and the
operation of {,Y}FS.InlineBulkStatus when prospectively constructing or
updating of a set of inodes during a lookup.

Fix this to indicate the reception of a valid abort code.

Fixes: a38a75581e ("afs: Fix unlink to handle YFS.RemoveFile2 better")
Signed-off-by: David Howells <dhowells@redhat.com>
2020-04-13 15:09:01 +01:00

2390 lines
56 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/* AFS File Server client stubs
*
* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*/
#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 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]));
}
/*
* decode an AFSFetchStatus block
*/
static int xdr_decode_AFSFetchStatus(const __be32 **_bp,
struct afs_call *call,
struct afs_status_cb *scb)
{
const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
struct afs_file_status *status = &scb->status;
bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
u64 data_version, size;
u32 type, abort_code;
int ret;
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;
scb->have_error = true;
goto good;
}
pr_warn("Unknown AFSFetchStatus version %u\n", ntohl(xdr->if_version));
goto bad;
}
if (abort_code != 0 && inline_error) {
status->abort_code = abort_code;
scb->have_error = true;
goto good;
}
type = ntohl(xdr->type);
switch (type) {
case AFS_FTYPE_FILE:
case AFS_FTYPE_DIR:
case AFS_FTYPE_SYMLINK:
status->type = type;
break;
default:
goto bad;
}
status->nlink = ntohl(xdr->nlink);
status->author = ntohl(xdr->author);
status->owner = ntohl(xdr->owner);
status->caller_access = ntohl(xdr->caller_access); /* Ticket dependent */
status->anon_access = ntohl(xdr->anon_access);
status->mode = ntohl(xdr->mode) & S_IALLUGO;
status->group = ntohl(xdr->group);
status->lock_count = ntohl(xdr->lock_count);
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;
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;
status->data_version = data_version;
scb->have_status = true;
good:
ret = 0;
advance:
*_bp = (const void *)*_bp + sizeof(*xdr);
return ret;
bad:
xdr_dump_bad(*_bp);
ret = afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
goto advance;
}
static time64_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
{
return ktime_divns(call->reply_time, NSEC_PER_SEC) + expiry;
}
static void xdr_decode_AFSCallBack(const __be32 **_bp,
struct afs_call *call,
struct afs_status_cb *scb)
{
struct afs_callback *cb = &scb->callback;
const __be32 *bp = *_bp;
bp++; /* version */
cb->expires_at = xdr_decode_expiry(call, ntohl(*bp++));
bp++; /* type */
scb->have_cb = true;
*_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)
{
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_AFSCallBack(&bp, call, call->out_scb);
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_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_status_cb *scb,
struct afs_volsync *volsync)
{
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, scb, volsync);
_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->out_scb = scb;
call->out_volsync = volsync;
/* 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);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.FetchData
*/
static int afs_deliver_fs_fetch_data(struct afs_call *call)
{
struct afs_read *req = call->read_request;
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);
}
/* Fall through */
/* 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->def_iter, READ, call->bvec, 1, size);
ASSERTCMP(size, <=, PAGE_SIZE);
/* Fall through */
/* 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(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 */
afs_extract_discard(call, req->actual_len - req->len);
call->unmarshall = 3;
/* Fall through */
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);
/* Fall through */
/* extract the metadata */
case 4:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_AFSCallBack(&bp, call, call->out_scb);
xdr_decode_AFSVolSync(&bp, call->out_volsync);
req->data_version = call->out_scb->status.data_version;
req->file_size = call->out_scb->status.size;
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(req);
req->offset = 0;
}
_leave(" = 0 [done]");
return 0;
}
static void afs_fetch_data_destructor(struct afs_call *call)
{
struct afs_read *req = call->read_request;
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_status_cb *scb,
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->out_scb = scb;
call->out_volsync = NULL;
call->read_request = afs_get_read(req);
/* 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));
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* fetch data from a file
*/
int afs_fs_fetch_data(struct afs_fs_cursor *fc,
struct afs_status_cb *scb,
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, scb, 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, scb, req);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->out_scb = scb;
call->out_volsync = NULL;
call->read_request = afs_get_read(req);
/* 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));
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.CreateFile or an FS.MakeDir
*/
static int afs_deliver_fs_create_vnode(struct afs_call *call)
{
const __be32 *bp;
int ret;
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->out_fid);
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_AFSCallBack(&bp, call, call->out_scb);
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_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,
struct afs_status_cb *dvnode_scb,
struct afs_fid *newfid,
struct afs_status_cb *new_scb)
{
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)){
if (S_ISDIR(mode))
return yfs_fs_make_dir(fc, name, mode, dvnode_scb,
newfid, new_scb);
else
return yfs_fs_create_file(fc, name, mode, dvnode_scb,
newfid, new_scb);
}
_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->out_dir_scb = dvnode_scb;
call->out_fid = newfid;
call->out_scb = new_scb;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
*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(AFS_SET_MODE | AFS_SET_MTIME);
*bp++ = htonl(dvnode->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_call1(call, &dvnode->fid, name);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* Deliver reply data to any operation that returns directory status and volume
* sync.
*/
static int afs_deliver_fs_dir_status_and_vol(struct afs_call *call)
{
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_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_dir_status_and_vol,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type afs_RXFSRemoveDir = {
.name = "FS.RemoveDir",
.op = afs_FS_RemoveDir,
.deliver = afs_deliver_fs_dir_status_and_vol,
.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, struct afs_status_cb *dvnode_scb)
{
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, dvnode_scb);
_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->out_dir_scb = dvnode_scb;
/* 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_call1(call, &dvnode->fid, name);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.Link
*/
static int afs_deliver_fs_link(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;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_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,
struct afs_status_cb *dvnode_scb,
struct afs_status_cb *vnode_scb)
{
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, dvnode_scb, vnode_scb);
_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->out_dir_scb = dvnode_scb;
call->out_scb = vnode_scb;
/* 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_call1(call, &vnode->fid, name);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.Symlink
*/
static int afs_deliver_fs_symlink(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_AFSFid(&bp, call->out_fid);
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_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,
struct afs_status_cb *dvnode_scb,
struct afs_fid *newfid,
struct afs_status_cb *new_scb)
{
struct afs_vnode *dvnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(dvnode);
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, dvnode_scb,
newfid, new_scb);
_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->out_dir_scb = dvnode_scb;
call->out_fid = newfid;
call->out_scb = new_scb;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSSYMLINK);
*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(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(dvnode->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_call1(call, &dvnode->fid, name);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.Rename
*/
static int afs_deliver_fs_rename(struct afs_call *call)
{
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
if (call->out_dir_scb != call->out_scb) {
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
}
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_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,
};
/*
* Rename/move a file or directory.
*/
int afs_fs_rename(struct afs_fs_cursor *fc,
const char *orig_name,
struct afs_vnode *new_dvnode,
const char *new_name,
struct afs_status_cb *orig_dvnode_scb,
struct afs_status_cb *new_dvnode_scb)
{
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,
orig_dvnode_scb,
new_dvnode_scb);
_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->out_dir_scb = orig_dvnode_scb;
call->out_scb = new_dvnode_scb;
/* 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_call2(call, &orig_dvnode->fid, orig_name, new_name);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.StoreData
*/
static int afs_deliver_fs_store_data(struct afs_call *call)
{
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 = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_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_status_cb *scb)
{
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->first = first;
call->last = last;
call->first_offset = offset;
call->last_to = to;
call->send_pages = true;
call->out_scb = scb;
/* 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);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* 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_status_cb *scb)
{
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, scb);
_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, scb);
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->first = first;
call->last = last;
call->first_offset = offset;
call->last_to = to;
call->send_pages = true;
call->out_scb = scb;
/* 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);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.StoreStatus
*/
static int afs_deliver_fs_store_status(struct afs_call *call)
{
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 = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_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_status_cb *scb)
{
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->out_scb = scb;
/* 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);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* 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_status_cb *scb)
{
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, scb);
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->out_scb = scb;
/* 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);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* 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_status_cb *scb)
{
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, scb);
if (attr->ia_valid & ATTR_SIZE)
return afs_fs_setattr_size(fc, attr, scb);
_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->out_scb = scb;
/* 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);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* 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);
/* Fall through */
/* 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->out_volstatus);
call->unmarshall++;
afs_extract_to_tmp(call);
/* Fall through */
/* 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_to_buf(call, size);
call->unmarshall++;
/* Fall through */
/* extract the volume name */
case 3:
_debug("extract volname");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
p = call->buffer;
p[call->count] = 0;
_debug("volname '%s'", p);
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* 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_to_buf(call, size);
call->unmarshall++;
/* Fall through */
/* extract the offline message */
case 5:
_debug("extract offline");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
p = call->buffer;
p[call->count] = 0;
_debug("offline '%s'", p);
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* 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_to_buf(call, size);
call->unmarshall++;
/* Fall through */
/* extract the message of the day */
case 7:
_debug("extract motd");
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
p = call->buffer;
p[call->count] = 0;
_debug("motd '%s'", p);
call->unmarshall++;
case 8:
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* 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_flat_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;
if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
return yfs_fs_get_volume_status(fc, vs);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4,
max(12 * 4, AFSOPAQUEMAX + 1));
if (!call)
return -ENOMEM;
call->key = fc->key;
call->out_volstatus = vs;
/* 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);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* 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->out_volsync);
_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,
.done = afs_lock_op_done,
.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,
.done = afs_lock_op_done,
.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_status_cb *scb)
{
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, scb);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->lvnode = vnode;
call->out_scb = scb;
/* 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_calli(call, &vnode->fid, type);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* extend a lock on a file
*/
int afs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
{
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, scb);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->lvnode = vnode;
call->out_scb = scb;
/* 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);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* release a lock on a file
*/
int afs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
{
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, scb);
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
if (!call)
return -ENOMEM;
call->key = fc->key;
call->lvnode = vnode;
call->out_scb = scb;
/* 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);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* 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 */
afs_make_call(ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, ac);
}
/*
* 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++;
/* Fall through */
/* 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;
afs_extract_discard(call, count * sizeof(__be32));
call->unmarshall++;
/* Fall through */
/* 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;
}
/*
* 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_flat_call_destructor,
};
/*
* Probe a fileserver for the capabilities that it supports. This can
* return up to 196 words.
*/
struct afs_call *afs_fs_get_capabilities(struct afs_net *net,
struct afs_server *server,
struct afs_addr_cursor *ac,
struct key *key,
unsigned int server_index)
{
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
if (!call)
return ERR_PTR(-ENOMEM);
call->key = key;
call->server = afs_get_server(server, afs_server_trace_get_caps);
call->server_index = server_index;
call->upgrade = true;
call->async = true;
call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
/* marshall the parameters */
bp = call->request;
*bp++ = htonl(FSGETCAPABILITIES);
/* Can't take a ref on server */
trace_afs_make_fs_call(call, NULL);
afs_make_call(ac, call, GFP_NOFS);
return call;
}
/*
* Deliver reply data to an FS.FetchStatus with no vnode.
*/
static int afs_deliver_fs_fetch_status(struct afs_call *call)
{
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
/* unmarshall the reply once we've received all of it */
bp = call->buffer;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_AFSCallBack(&bp, call, call->out_scb);
xdr_decode_AFSVolSync(&bp, call->out_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_status_cb *scb,
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, scb, 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->out_fid = fid;
call->out_scb = scb;
call->out_volsync = volsync;
/* 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);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, fid);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* Deliver reply data to an FS.InlineBulkStatus call
*/
static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
{
struct afs_status_cb *scb;
const __be32 *bp;
u32 tmp;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* 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));
/* Fall through */
case 2:
_debug("extract status array %u", call->count);
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
bp = call->buffer;
scb = &call->out_scb[call->count];
ret = xdr_decode_AFSFetchStatus(&bp, call, scb);
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);
/* Fall through */
/* 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));
/* Fall through */
case 4:
_debug("extract CB array");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
_debug("unmarshall CB array");
bp = call->buffer;
scb = &call->out_scb[call->count];
xdr_decode_AFSCallBack(&bp, call, scb);
call->count++;
if (call->count < call->count2)
goto more_cbs;
afs_extract_to_buf(call, 6 * sizeof(__be32));
call->unmarshall++;
/* Fall through */
case 5:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_AFSVolSync(&bp, call->out_volsync);
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_status_cb *statuses,
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,
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->out_scb = statuses;
call->out_volsync = volsync;
call->count2 = nr_fids;
/* 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);
}
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &fids[0]);
afs_set_fc_call(call, fc);
afs_make_call(&fc->ac, call, GFP_NOFS);
return afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* deliver reply data to an FS.FetchACL
*/
static int afs_deliver_fs_fetch_acl(struct afs_call *call)
{
struct afs_acl *acl;
const __be32 *bp;
unsigned int size;
int ret;
_enter("{%u}", call->unmarshall);
switch (call->unmarshall) {
case 0:
afs_extract_to_tmp(call);
call->unmarshall++;
/* Fall through */
/* extract the returned data length */
case 1:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
size = call->count2 = ntohl(call->tmp);
size = round_up(size, 4);
acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
if (!acl)
return -ENOMEM;
call->ret_acl = acl;
acl->size = call->count2;
afs_extract_begin(call, acl->data, size);
call->unmarshall++;
/* Fall through */
/* extract the returned data */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
afs_extract_to_buf(call, (21 + 6) * 4);
call->unmarshall++;
/* Fall through */
/* extract the metadata */
case 3:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_AFSVolSync(&bp, call->out_volsync);
call->unmarshall++;
case 4:
break;
}
_leave(" = 0 [done]");
return 0;
}
static void afs_destroy_fs_fetch_acl(struct afs_call *call)
{
kfree(call->ret_acl);
afs_flat_call_destructor(call);
}
/*
* FS.FetchACL operation type
*/
static const struct afs_call_type afs_RXFSFetchACL = {
.name = "FS.FetchACL",
.op = afs_FS_FetchACL,
.deliver = afs_deliver_fs_fetch_acl,
.destructor = afs_destroy_fs_fetch_acl,
};
/*
* Fetch the ACL for a file.
*/
struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *fc,
struct afs_status_cb *scb)
{
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_RXFSFetchACL, 16, (21 + 6) * 4);
if (!call) {
fc->ac.error = -ENOMEM;
return ERR_PTR(-ENOMEM);
}
call->key = fc->key;
call->ret_acl = NULL;
call->out_scb = scb;
call->out_volsync = NULL;
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSFETCHACL);
bp[1] = htonl(vnode->fid.vid);
bp[2] = htonl(vnode->fid.vnode);
bp[3] = htonl(vnode->fid.unique);
afs_use_fs_server(call, fc->cbi);
trace_afs_make_fs_call(call, &vnode->fid);
afs_make_call(&fc->ac, call, GFP_KERNEL);
return (struct afs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* Deliver reply data to any operation that returns file status and volume
* sync.
*/
static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
{
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_AFSVolSync(&bp, call->out_volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.StoreACL operation type
*/
static const struct afs_call_type afs_RXFSStoreACL = {
.name = "FS.StoreACL",
.op = afs_FS_StoreACL,
.deliver = afs_deliver_fs_file_status_and_vol,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the ACL for a file.
*/
int afs_fs_store_acl(struct afs_fs_cursor *fc, const struct afs_acl *acl,
struct afs_status_cb *scb)
{
struct afs_vnode *vnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(vnode);
size_t size;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
size = round_up(acl->size, 4);
call = afs_alloc_flat_call(net, &afs_RXFSStoreACL,
5 * 4 + size, (21 + 6) * 4);
if (!call) {
fc->ac.error = -ENOMEM;
return -ENOMEM;
}
call->key = fc->key;
call->out_scb = scb;
call->out_volsync = NULL;
/* marshall the parameters */
bp = call->request;
bp[0] = htonl(FSSTOREACL);
bp[1] = htonl(vnode->fid.vid);
bp[2] = htonl(vnode->fid.vnode);
bp[3] = htonl(vnode->fid.unique);
bp[4] = htonl(acl->size);
memcpy(&bp[5], acl->data, acl->size);
if (acl->size != size)
memset((void *)&bp[5] + acl->size, 0, size - acl->size);
trace_afs_make_fs_call(call, &vnode->fid);
afs_make_call(&fc->ac, call, GFP_KERNEL);
return afs_wait_for_call_to_complete(call, &fc->ac);
}