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yfsclient.c
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yfsclient.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/* YFS File Server client stubs
*
* Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
* Written by David Howells ([email protected])
*/
#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"
#define xdr_size(x) (sizeof(*x) / sizeof(__be32))
static void xdr_decode_YFSFid(const __be32 **_bp, struct afs_fid *fid)
{
const struct yfs_xdr_YFSFid *x = (const void *)*_bp;
fid->vid = xdr_to_u64(x->volume);
fid->vnode = xdr_to_u64(x->vnode.lo);
fid->vnode_hi = ntohl(x->vnode.hi);
fid->unique = ntohl(x->vnode.unique);
*_bp += xdr_size(x);
}
static __be32 *xdr_encode_u32(__be32 *bp, u32 n)
{
*bp++ = htonl(n);
return bp;
}
static __be32 *xdr_encode_u64(__be32 *bp, u64 n)
{
struct yfs_xdr_u64 *x = (void *)bp;
*x = u64_to_xdr(n);
return bp + xdr_size(x);
}
static __be32 *xdr_encode_YFSFid(__be32 *bp, struct afs_fid *fid)
{
struct yfs_xdr_YFSFid *x = (void *)bp;
x->volume = u64_to_xdr(fid->vid);
x->vnode.lo = u64_to_xdr(fid->vnode);
x->vnode.hi = htonl(fid->vnode_hi);
x->vnode.unique = htonl(fid->unique);
return bp + xdr_size(x);
}
static size_t xdr_strlen(unsigned int len)
{
return sizeof(__be32) + round_up(len, sizeof(__be32));
}
static __be32 *xdr_encode_string(__be32 *bp, const char *p, unsigned int len)
{
bp = xdr_encode_u32(bp, len);
bp = memcpy(bp, p, len);
if (len & 3) {
unsigned int pad = 4 - (len & 3);
memset((u8 *)bp + len, 0, pad);
len += pad;
}
return bp + len / sizeof(__be32);
}
static __be32 *xdr_encode_name(__be32 *bp, const struct qstr *p)
{
return xdr_encode_string(bp, p->name, p->len);
}
static s64 linux_to_yfs_time(const struct timespec64 *t)
{
/* Convert to 100ns intervals. */
return (u64)t->tv_sec * 10000000 + t->tv_nsec/100;
}
static __be32 *xdr_encode_YFSStoreStatus(__be32 *bp, mode_t *mode,
const struct timespec64 *t)
{
struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
mode_t masked_mode = mode ? *mode & S_IALLUGO : 0;
s64 mtime = linux_to_yfs_time(t);
u32 mask = AFS_SET_MTIME;
mask |= mode ? AFS_SET_MODE : 0;
x->mask = htonl(mask);
x->mode = htonl(masked_mode);
x->mtime_client = u64_to_xdr(mtime);
x->owner = u64_to_xdr(0);
x->group = u64_to_xdr(0);
return bp + xdr_size(x);
}
/*
* Convert a signed 100ns-resolution 64-bit time into a timespec.
*/
static struct timespec64 yfs_time_to_linux(s64 t)
{
struct timespec64 ts;
u64 abs_t;
/*
* Unfortunately can not use normal 64 bit division on 32 bit arch, but
* the alternative, do_div, does not work with negative numbers so have
* to special case them
*/
if (t < 0) {
abs_t = -t;
ts.tv_nsec = (time64_t)(do_div(abs_t, 10000000) * 100);
ts.tv_nsec = -ts.tv_nsec;
ts.tv_sec = -abs_t;
} else {
abs_t = t;
ts.tv_nsec = (time64_t)do_div(abs_t, 10000000) * 100;
ts.tv_sec = abs_t;
}
return ts;
}
static struct timespec64 xdr_to_time(const struct yfs_xdr_u64 xdr)
{
s64 t = xdr_to_u64(xdr);
return yfs_time_to_linux(t);
}
static void yfs_check_req(struct afs_call *call, __be32 *bp)
{
size_t len = (void *)bp - call->request;
if (len > call->request_size)
pr_err("kAFS: %s: Request buffer overflow (%zu>%u)\n",
call->type->name, len, call->request_size);
else if (len < call->request_size)
pr_warn("kAFS: %s: Request buffer underflow (%zu<%u)\n",
call->type->name, len, call->request_size);
}
/*
* Dump a bad file status record.
*/
static void xdr_dump_bad(const __be32 *bp)
{
__be32 x[4];
int i;
pr_notice("YFS XDR: Bad status record\n");
for (i = 0; i < 6 * 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, 8);
pr_notice("0x60: %08x %08x\n", ntohl(x[0]), ntohl(x[1]));
}
/*
* Decode a YFSFetchStatus block
*/
static void xdr_decode_YFSFetchStatus(const __be32 **_bp,
struct afs_call *call,
struct afs_status_cb *scb)
{
const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
struct afs_file_status *status = &scb->status;
u32 type;
status->abort_code = ntohl(xdr->abort_code);
if (status->abort_code != 0) {
if (status->abort_code == VNOVNODE)
status->nlink = 0;
scb->have_error = true;
goto advance;
}
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 = xdr_to_u64(xdr->author);
status->owner = xdr_to_u64(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 = xdr_to_u64(xdr->group);
status->lock_count = ntohl(xdr->lock_count);
status->mtime_client = xdr_to_time(xdr->mtime_client);
status->mtime_server = xdr_to_time(xdr->mtime_server);
status->size = xdr_to_u64(xdr->size);
status->data_version = xdr_to_u64(xdr->data_version);
scb->have_status = true;
advance:
*_bp += xdr_size(xdr);
return;
bad:
xdr_dump_bad(*_bp);
afs_protocol_error(call, afs_eproto_bad_status);
goto advance;
}
/*
* Decode a YFSCallBack block
*/
static void xdr_decode_YFSCallBack(const __be32 **_bp,
struct afs_call *call,
struct afs_status_cb *scb)
{
struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
struct afs_callback *cb = &scb->callback;
ktime_t cb_expiry;
cb_expiry = ktime_add(call->issue_time, xdr_to_u64(x->expiration_time) * 100);
cb->expires_at = ktime_divns(cb_expiry, NSEC_PER_SEC);
scb->have_cb = true;
*_bp += xdr_size(x);
}
/*
* Decode a YFSVolSync block
*/
static void xdr_decode_YFSVolSync(const __be32 **_bp,
struct afs_volsync *volsync)
{
struct yfs_xdr_YFSVolSync *x = (void *)*_bp;
u64 creation, update;
if (volsync) {
creation = xdr_to_u64(x->vol_creation_date);
do_div(creation, 10 * 1000 * 1000);
volsync->creation = creation;
update = xdr_to_u64(x->vol_update_date);
do_div(update, 10 * 1000 * 1000);
volsync->update = update;
}
*_bp += xdr_size(x);
}
/*
* Encode the requested attributes into a YFSStoreStatus block
*/
static __be32 *xdr_encode_YFS_StoreStatus(__be32 *bp, struct iattr *attr)
{
struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
s64 mtime = 0, owner = 0, group = 0;
u32 mask = 0, mode = 0;
mask = 0;
if (attr->ia_valid & ATTR_MTIME) {
mask |= AFS_SET_MTIME;
mtime = linux_to_yfs_time(&attr->ia_mtime);
}
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;
}
x->mask = htonl(mask);
x->mode = htonl(mode);
x->mtime_client = u64_to_xdr(mtime);
x->owner = u64_to_xdr(owner);
x->group = u64_to_xdr(group);
return bp + xdr_size(x);
}
/*
* Decode a YFSFetchVolumeStatus block.
*/
static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
struct afs_volume_status *vs)
{
const struct yfs_xdr_YFSFetchVolumeStatus *x = (const void *)*_bp;
u32 flags;
vs->vid = xdr_to_u64(x->vid);
vs->parent_id = xdr_to_u64(x->parent_id);
flags = ntohl(x->flags);
vs->online = flags & yfs_FVSOnline;
vs->in_service = flags & yfs_FVSInservice;
vs->blessed = flags & yfs_FVSBlessed;
vs->needs_salvage = flags & yfs_FVSNeedsSalvage;
vs->type = ntohl(x->type);
vs->min_quota = 0;
vs->max_quota = xdr_to_u64(x->max_quota);
vs->blocks_in_use = xdr_to_u64(x->blocks_in_use);
vs->part_blocks_avail = xdr_to_u64(x->part_blocks_avail);
vs->part_max_blocks = xdr_to_u64(x->part_max_blocks);
vs->vol_copy_date = xdr_to_u64(x->vol_copy_date);
vs->vol_backup_date = xdr_to_u64(x->vol_backup_date);
*_bp += sizeof(*x) / sizeof(__be32);
}
/*
* Deliver reply data to operations that just return a file status and a volume
* sync record.
*/
static int yfs_deliver_status_and_volsync(struct afs_call *call)
{
struct afs_operation *op = call->op;
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_YFSFetchStatus(&bp, call, &op->file[0].scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* Deliver reply data to an YFS.FetchData64.
*/
static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *vp = &op->file[0];
struct afs_read *req = op->fetch.req;
const __be32 *bp;
size_t count_before;
int ret;
_enter("{%u,%zu, %zu/%llu}",
call->unmarshall, call->iov_len, iov_iter_count(call->iter),
req->actual_len);
switch (call->unmarshall) {
case 0:
req->actual_len = 0;
afs_extract_to_tmp64(call);
call->unmarshall++;
fallthrough;
/* Extract the returned data length into ->actual_len. This
* may indicate more or less data than was requested will be
* returned.
*/
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);
if (req->actual_len == 0)
goto no_more_data;
call->iter = req->iter;
call->iov_len = min(req->actual_len, req->len);
call->unmarshall++;
fallthrough;
/* extract the returned data */
case 2:
count_before = call->iov_len;
_debug("extract data %zu/%llu", count_before, req->actual_len);
ret = afs_extract_data(call, true);
if (req->subreq) {
req->subreq->transferred += count_before - call->iov_len;
netfs_read_subreq_progress(req->subreq, false);
}
if (ret < 0)
return ret;
call->iter = &call->def_iter;
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;
fallthrough;
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,
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSCallBack) +
sizeof(struct yfs_xdr_YFSVolSync));
fallthrough;
/* extract the metadata */
case 4:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_YFSCallBack(&bp, call, &vp->scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
req->data_version = vp->scb.status.data_version;
req->file_size = vp->scb.status.size;
call->unmarshall++;
fallthrough;
case 5:
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* YFS.FetchData64 operation type
*/
static const struct afs_call_type yfs_RXYFSFetchData64 = {
.name = "YFS.FetchData64",
.op = yfs_FS_FetchData64,
.deliver = yfs_deliver_fs_fetch_data64,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch data from a file.
*/
void yfs_fs_fetch_data(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_read *req = op->fetch.req;
struct afs_call *call;
__be32 *bp;
_enter(",%x,{%llx:%llu},%llx,%llx",
key_serial(op->key), vp->fid.vid, vp->fid.vnode,
req->pos, req->len);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchData64,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_u64) * 2,
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSCallBack) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return afs_op_nomem(op);
req->call_debug_id = call->debug_id;
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSFETCHDATA64);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
bp = xdr_encode_u64(bp, req->pos);
bp = xdr_encode_u64(bp, req->len);
yfs_check_req(call, bp);
call->fid = vp->fid;
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data for YFS.CreateFile or YFS.MakeDir.
*/
static int yfs_deliver_fs_create_vnode(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[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;
xdr_decode_YFSFid(&bp, &op->file[1].fid);
xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
xdr_decode_YFSCallBack(&bp, call, &vp->scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* FS.CreateFile and FS.MakeDir operation type
*/
static const struct afs_call_type afs_RXFSCreateFile = {
.name = "YFS.CreateFile",
.op = yfs_FS_CreateFile,
.deliver = yfs_deliver_fs_create_vnode,
.destructor = afs_flat_call_destructor,
};
/*
* Create a file.
*/
void yfs_fs_create_file(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
size_t reqsz, rplsz;
__be32 *bp;
_enter("");
reqsz = (sizeof(__be32) +
sizeof(__be32) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(name->len) +
sizeof(struct yfs_xdr_YFSStoreStatus) +
sizeof(__be32));
rplsz = (sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSCallBack) +
sizeof(struct yfs_xdr_YFSVolSync));
call = afs_alloc_flat_call(op->net, &afs_RXFSCreateFile, reqsz, rplsz);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSCREATEFILE);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvp->fid);
bp = xdr_encode_name(bp, name);
bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
yfs_check_req(call, bp);
call->fid = dvp->fid;
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
static const struct afs_call_type yfs_RXFSMakeDir = {
.name = "YFS.MakeDir",
.op = yfs_FS_MakeDir,
.deliver = yfs_deliver_fs_create_vnode,
.destructor = afs_flat_call_destructor,
};
/*
* Make a directory.
*/
void yfs_fs_make_dir(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
size_t reqsz, rplsz;
__be32 *bp;
_enter("");
reqsz = (sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(name->len) +
sizeof(struct yfs_xdr_YFSStoreStatus));
rplsz = (sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSCallBack) +
sizeof(struct yfs_xdr_YFSVolSync));
call = afs_alloc_flat_call(op->net, &yfs_RXFSMakeDir, reqsz, rplsz);
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSMAKEDIR);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvp->fid);
bp = xdr_encode_name(bp, name);
bp = xdr_encode_YFSStoreStatus(bp, &op->create.mode, &op->mtime);
yfs_check_req(call, bp);
call->fid = dvp->fid;
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to a YFS.RemoveFile2 operation.
*/
static int yfs_deliver_fs_remove_file2(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
struct afs_fid fid;
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
xdr_decode_YFSFid(&bp, &fid);
xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
/* Was deleted if vnode->status.abort_code == VNOVNODE. */
xdr_decode_YFSVolSync(&bp, &op->volsync);
return 0;
}
static void yfs_done_fs_remove_file2(struct afs_call *call)
{
if (call->error == -ECONNABORTED &&
call->abort_code == RX_INVALID_OPERATION) {
set_bit(AFS_SERVER_FL_NO_RM2, &call->server->flags);
call->op->flags |= AFS_OPERATION_DOWNGRADE;
}
}
/*
* YFS.RemoveFile2 operation type.
*/
static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
.name = "YFS.RemoveFile2",
.op = yfs_FS_RemoveFile2,
.deliver = yfs_deliver_fs_remove_file2,
.done = yfs_done_fs_remove_file2,
.destructor = afs_flat_call_destructor,
};
/*
* Remove a file and retrieve new file status.
*/
void yfs_fs_remove_file2(struct afs_operation *op)
{
struct afs_vnode_param *dvp = &op->file[0];
const struct qstr *name = &op->dentry->d_name;
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile2,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(name->len),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSREMOVEFILE2);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvp->fid);
bp = xdr_encode_name(bp, name);
yfs_check_req(call, bp);
call->fid = dvp->fid;
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to a YFS.RemoveFile or YFS.RemoveDir operation.
*/
static int yfs_deliver_fs_remove(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *dvp = &op->file[0];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
return 0;
}
/*
* FS.RemoveDir and FS.RemoveFile operation types.
*/
static const struct afs_call_type yfs_RXYFSRemoveFile = {
.name = "YFS.RemoveFile",
.op = yfs_FS_RemoveFile,
.deliver = yfs_deliver_fs_remove,
.destructor = afs_flat_call_destructor,
};
/*
* Remove a file.
*/
void yfs_fs_remove_file(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
if (!test_bit(AFS_SERVER_FL_NO_RM2, &op->server->flags))
return yfs_fs_remove_file2(op);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveFile,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(name->len),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSREMOVEFILE);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvp->fid);
bp = xdr_encode_name(bp, name);
yfs_check_req(call, bp);
call->fid = dvp->fid;
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
static const struct afs_call_type yfs_RXYFSRemoveDir = {
.name = "YFS.RemoveDir",
.op = yfs_FS_RemoveDir,
.deliver = yfs_deliver_fs_remove,
.destructor = afs_flat_call_destructor,
};
/*
* Remove a directory.
*/
void yfs_fs_remove_dir(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &yfs_RXYFSRemoveDir,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(name->len),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSREMOVEDIR);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvp->fid);
bp = xdr_encode_name(bp, name);
yfs_check_req(call, bp);
call->fid = dvp->fid;
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to a YFS.Link operation.
*/
static int yfs_deliver_fs_link(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* YFS.Link operation type.
*/
static const struct afs_call_type yfs_RXYFSLink = {
.name = "YFS.Link",
.op = yfs_FS_Link,
.deliver = yfs_deliver_fs_link,
.destructor = afs_flat_call_destructor,
};
/*
* Make a hard link.
*/
void yfs_fs_link(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &yfs_RXYFSLink,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(name->len) +
sizeof(struct yfs_xdr_YFSFid),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSLINK);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvp->fid);
bp = xdr_encode_name(bp, name);
bp = xdr_encode_YFSFid(bp, &vp->fid);
yfs_check_req(call, bp);
call->fid = vp->fid;
trace_afs_make_fs_call1(call, &vp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to a YFS.Symlink operation.
*/
static int yfs_deliver_fs_symlink(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[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;
xdr_decode_YFSFid(&bp, &vp->fid);
xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_YFSFetchStatus(&bp, call, &dvp->scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* YFS.Symlink operation type
*/
static const struct afs_call_type yfs_RXYFSSymlink = {
.name = "YFS.Symlink",
.op = yfs_FS_Symlink,
.deliver = yfs_deliver_fs_symlink,
.destructor = afs_flat_call_destructor,
};
/*
* Create a symbolic link.
*/
void yfs_fs_symlink(struct afs_operation *op)
{
const struct qstr *name = &op->dentry->d_name;
struct afs_vnode_param *dvp = &op->file[0];
struct afs_call *call;
size_t contents_sz;
mode_t mode = 0777;
__be32 *bp;
_enter("");
contents_sz = strlen(op->create.symlink);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSSymlink,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(name->len) +
xdr_strlen(contents_sz) +
sizeof(struct yfs_xdr_YFSStoreStatus),
sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSSYMLINK);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvp->fid);
bp = xdr_encode_name(bp, name);
bp = xdr_encode_string(bp, op->create.symlink, contents_sz);
bp = xdr_encode_YFSStoreStatus(bp, &mode, &op->mtime);
yfs_check_req(call, bp);
call->fid = dvp->fid;
trace_afs_make_fs_call1(call, &dvp->fid, name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to a YFS.Rename operation.
*/
static int yfs_deliver_fs_rename(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *orig_dvp = &op->file[0];
struct afs_vnode_param *new_dvp = &op->file[1];
const __be32 *bp;
int ret;