linux-stable/fs/afs/yfsclient.c
Marc Dionne 52af7105ec afs: Set mtime from the client for yfs create operations
For operations that create vnodes on the server such as CreateFile,
MakeDir or Symlink, the server will store its own current time as
the mtime if the client doesn't pass in a time in the accompanying
StoreStatus structure.

If the server and client clocks are not well synchronized, the client
may see timestamps in the future or inconsistent dependency checks
with "make" for files that are not modified after creation:

make[2]: Warning: File 'arch/x86/kernel/apic/modules.order' has
modification time 0.14 s in the future
make[2]: warning:  Clock skew detected.  Your build may be incomplete.

This is already handled correctly for non yfs operations; also
set the mtime for the corresponding yfs operations.

Changes:
v3: Replace S_IRWXUGO with 0777, per checkpatch
v2: [dhowells] Merge the two xdr_encode_YFSStoreStatus*() functions together

Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Link: http://lists.infradead.org/pipermail/linux-afs/2021-October/004395.html
2021-11-02 09:42:26 +00:00

1954 lines
47 KiB
C

// 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 (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"
#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 = call->reply_time;
cb_expiry = ktime_add(cb_expiry, 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;
if (volsync) {
creation = xdr_to_u64(x->vol_creation_date);
do_div(creation, 10 * 1000 * 1000);
volsync->creation = creation;
}
*_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;
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:
_debug("extract data %zu/%llu",
iov_iter_count(call->iter), req->actual_len);
ret = afs_extract_data(call, true);
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);
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);
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);
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);
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);
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);
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);
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);
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;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
/* If the two dirs are the same, we have two copies of the same status
* report, so we just decode it twice.
*/
xdr_decode_YFSFetchStatus(&bp, call, &orig_dvp->scb);
xdr_decode_YFSFetchStatus(&bp, call, &new_dvp->scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* YFS.Rename operation type
*/
static const struct afs_call_type yfs_RXYFSRename = {
.name = "FS.Rename",
.op = yfs_FS_Rename,
.deliver = yfs_deliver_fs_rename,
.destructor = afs_flat_call_destructor,
};
/*
* Rename a file or directory.
*/
void yfs_fs_rename(struct afs_operation *op)
{
struct afs_vnode_param *orig_dvp = &op->file[0];
struct afs_vnode_param *new_dvp = &op->file[1];
const struct qstr *orig_name = &op->dentry->d_name;
const struct qstr *new_name = &op->dentry_2->d_name;
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &yfs_RXYFSRename,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(orig_name->len) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(new_name->len),
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, YFSRENAME);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &orig_dvp->fid);
bp = xdr_encode_name(bp, orig_name);
bp = xdr_encode_YFSFid(bp, &new_dvp->fid);
bp = xdr_encode_name(bp, new_name);
yfs_check_req(call, bp);
trace_afs_make_fs_call2(call, &orig_dvp->fid, orig_name, new_name);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* YFS.StoreData64 operation type.
*/
static const struct afs_call_type yfs_RXYFSStoreData64 = {
.name = "YFS.StoreData64",
.op = yfs_FS_StoreData64,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
/*
* Store a set of pages to a large file.
*/
void yfs_fs_store_data(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
_debug("size %llx, at %llx, i_size %llx",
(unsigned long long)op->store.size,
(unsigned long long)op->store.pos,
(unsigned long long)op->store.i_size);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64,
sizeof(__be32) +
sizeof(__be32) +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_YFSStoreStatus) +
sizeof(struct yfs_xdr_u64) * 3,
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return afs_op_nomem(op);
call->write_iter = op->store.write_iter;
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSSTOREDATA64);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
bp = xdr_encode_YFSStoreStatus(bp, NULL, &op->mtime);
bp = xdr_encode_u64(bp, op->store.pos);
bp = xdr_encode_u64(bp, op->store.size);
bp = xdr_encode_u64(bp, op->store.i_size);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* YFS.StoreStatus operation type
*/
static const struct afs_call_type yfs_RXYFSStoreStatus = {
.name = "YFS.StoreStatus",
.op = yfs_FS_StoreStatus,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
.name = "YFS.StoreData64",
.op = yfs_FS_StoreData64,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
/*
* Set the attributes on a file, using YFS.StoreData64 rather than
* YFS.StoreStatus so as to alter the file size also.
*/
static void yfs_fs_setattr_size(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
struct iattr *attr = op->setattr.attr;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreData64_as_Status,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_YFSStoreStatus) +
sizeof(struct yfs_xdr_u64) * 3,
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, YFSSTOREDATA64);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
bp = xdr_encode_YFS_StoreStatus(bp, attr);
bp = xdr_encode_u64(bp, attr->ia_size); /* position of start of write */
bp = xdr_encode_u64(bp, 0); /* size of write */
bp = xdr_encode_u64(bp, attr->ia_size); /* new file length */
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Set the attributes on a file, using YFS.StoreData64 if there's a change in
* file size, and YFS.StoreStatus otherwise.
*/
void yfs_fs_setattr(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
struct iattr *attr = op->setattr.attr;
__be32 *bp;
if (attr->ia_valid & ATTR_SIZE)
return yfs_fs_setattr_size(op);
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreStatus,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_YFSStoreStatus),
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, YFSSTORESTATUS);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
bp = xdr_encode_YFS_StoreStatus(bp, attr);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to a YFS.GetVolumeStatus operation.
*/
static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
{
struct afs_operation *op = call->op;
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, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
fallthrough;
/* 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_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
call->unmarshall++;
afs_extract_to_tmp(call);
fallthrough;
/* 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, afs_eproto_volname_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_to_buf(call, size);
call->unmarshall++;
fallthrough;
/* 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++;
fallthrough;
/* 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, afs_eproto_offline_msg_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_to_buf(call, size);
call->unmarshall++;
fallthrough;
/* 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++;
fallthrough;
/* 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, afs_eproto_motd_len);
size = (call->count + 3) & ~3; /* It's padded */
afs_extract_to_buf(call, size);
call->unmarshall++;
fallthrough;
/* 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++;
fallthrough;
case 8:
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* YFS.GetVolumeStatus operation type
*/
static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
.name = "YFS.GetVolumeStatus",
.op = yfs_FS_GetVolumeStatus,
.deliver = yfs_deliver_fs_get_volume_status,
.destructor = afs_flat_call_destructor,
};
/*
* fetch the status of a volume
*/
void yfs_fs_get_volume_status(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &yfs_RXYFSGetVolumeStatus,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_u64),
max_t(size_t,
sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
sizeof(__be32),
AFSOPAQUEMAX + 1));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSGETVOLUMESTATUS);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_u64(bp, vp->fid.vid);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* YFS.SetLock operation type
*/
static const struct afs_call_type yfs_RXYFSSetLock = {
.name = "YFS.SetLock",
.op = yfs_FS_SetLock,
.deliver = yfs_deliver_status_and_volsync,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
/*
* YFS.ExtendLock operation type
*/
static const struct afs_call_type yfs_RXYFSExtendLock = {
.name = "YFS.ExtendLock",
.op = yfs_FS_ExtendLock,
.deliver = yfs_deliver_status_and_volsync,
.done = afs_lock_op_done,
.destructor = afs_flat_call_destructor,
};
/*
* YFS.ReleaseLock operation type
*/
static const struct afs_call_type yfs_RXYFSReleaseLock = {
.name = "YFS.ReleaseLock",
.op = yfs_FS_ReleaseLock,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
/*
* Set a lock on a file
*/
void yfs_fs_set_lock(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &yfs_RXYFSSetLock,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(__be32),
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, YFSSETLOCK);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
bp = xdr_encode_u32(bp, op->lock.type);
yfs_check_req(call, bp);
trace_afs_make_fs_calli(call, &vp->fid, op->lock.type);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* extend a lock on a file
*/
void yfs_fs_extend_lock(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &yfs_RXYFSExtendLock,
sizeof(__be32) * 2 +
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, YFSEXTENDLOCK);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* release a lock on a file
*/
void yfs_fs_release_lock(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter("");
call = afs_alloc_flat_call(op->net, &yfs_RXYFSReleaseLock,
sizeof(__be32) * 2 +
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, YFSRELEASELOCK);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver a reply to YFS.FetchStatus
*/
static int yfs_deliver_fs_fetch_status(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
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_YFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_YFSCallBack(&bp, call, &vp->scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* YFS.FetchStatus operation type
*/
static const struct afs_call_type yfs_RXYFSFetchStatus = {
.name = "YFS.FetchStatus",
.op = yfs_FS_FetchStatus,
.deliver = yfs_deliver_fs_fetch_status,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the status information for a fid without needing a vnode handle.
*/
void yfs_fs_fetch_status(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[op->fetch_status.which];
struct afs_call *call;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchStatus,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSCallBack) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSFETCHSTATUS);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to an YFS.InlineBulkStatus call
*/
static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
{
struct afs_operation *op = call->op;
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++;
fallthrough;
/* 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, op->nr_files);
if (tmp != op->nr_files)
return afs_protocol_error(call, afs_eproto_ibulkst_count);
call->count = 0;
call->unmarshall++;
more_counts:
afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
fallthrough;
case 2:
_debug("extract status array %u", call->count);
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
switch (call->count) {
case 0:
scb = &op->file[0].scb;
break;
case 1:
scb = &op->file[1].scb;
break;
default:
scb = &op->more_files[call->count - 2].scb;
break;
}
bp = call->buffer;
xdr_decode_YFSFetchStatus(&bp, call, scb);
call->count++;
if (call->count < op->nr_files)
goto more_counts;
call->count = 0;
call->unmarshall++;
afs_extract_to_tmp(call);
fallthrough;
/* 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 != op->nr_files)
return afs_protocol_error(call, afs_eproto_ibulkst_cb_count);
call->count = 0;
call->unmarshall++;
more_cbs:
afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
fallthrough;
case 4:
_debug("extract CB array");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
_debug("unmarshall CB array");
switch (call->count) {
case 0:
scb = &op->file[0].scb;
break;
case 1:
scb = &op->file[1].scb;
break;
default:
scb = &op->more_files[call->count - 2].scb;
break;
}
bp = call->buffer;
xdr_decode_YFSCallBack(&bp, call, scb);
call->count++;
if (call->count < op->nr_files)
goto more_cbs;
afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
call->unmarshall++;
fallthrough;
case 5:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_YFSVolSync(&bp, &op->volsync);
call->unmarshall++;
fallthrough;
case 6:
break;
}
_leave(" = 0 [done]");
return 0;
}
/*
* FS.InlineBulkStatus operation type
*/
static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
.name = "YFS.InlineBulkStatus",
.op = yfs_FS_InlineBulkStatus,
.deliver = yfs_deliver_fs_inline_bulk_status,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the status information for up to 1024 files
*/
void yfs_fs_inline_bulk_status(struct afs_operation *op)
{
struct afs_vnode_param *dvp = &op->file[0];
struct afs_vnode_param *vp = &op->file[1];
struct afs_call *call;
__be32 *bp;
int i;
_enter(",%x,{%llx:%llu},%u",
key_serial(op->key), vp->fid.vid, vp->fid.vnode, op->nr_files);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSInlineBulkStatus,
sizeof(__be32) +
sizeof(__be32) +
sizeof(__be32) +
sizeof(struct yfs_xdr_YFSFid) * op->nr_files,
sizeof(struct yfs_xdr_YFSFetchStatus));
if (!call)
return afs_op_nomem(op);
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
bp = xdr_encode_u32(bp, 0); /* RPCFlags */
bp = xdr_encode_u32(bp, op->nr_files);
bp = xdr_encode_YFSFid(bp, &dvp->fid);
bp = xdr_encode_YFSFid(bp, &vp->fid);
for (i = 0; i < op->nr_files - 2; i++)
bp = xdr_encode_YFSFid(bp, &op->more_files[i].fid);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_NOFS);
}
/*
* Deliver reply data to an YFS.FetchOpaqueACL.
*/
static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
{
struct afs_operation *op = call->op;
struct afs_vnode_param *vp = &op->file[0];
struct yfs_acl *yacl = op->yacl;
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++;
fallthrough;
/* Extract the file ACL 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);
if (yacl->flags & YFS_ACL_WANT_ACL) {
acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
if (!acl)
return -ENOMEM;
yacl->acl = acl;
acl->size = call->count2;
afs_extract_begin(call, acl->data, size);
} else {
afs_extract_discard(call, size);
}
call->unmarshall++;
fallthrough;
/* Extract the file ACL */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
afs_extract_to_tmp(call);
call->unmarshall++;
fallthrough;
/* Extract the volume ACL length */
case 3:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
size = call->count2 = ntohl(call->tmp);
size = round_up(size, 4);
if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
if (!acl)
return -ENOMEM;
yacl->vol_acl = acl;
acl->size = call->count2;
afs_extract_begin(call, acl->data, size);
} else {
afs_extract_discard(call, size);
}
call->unmarshall++;
fallthrough;
/* Extract the volume ACL */
case 4:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
afs_extract_to_buf(call,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
call->unmarshall++;
fallthrough;
/* extract the metadata */
case 5:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
yacl->inherit_flag = ntohl(*bp++);
yacl->num_cleaned = ntohl(*bp++);
xdr_decode_YFSFetchStatus(&bp, call, &vp->scb);
xdr_decode_YFSVolSync(&bp, &op->volsync);
call->unmarshall++;
fallthrough;
case 6:
break;
}
_leave(" = 0 [done]");
return 0;
}
void yfs_free_opaque_acl(struct yfs_acl *yacl)
{
if (yacl) {
kfree(yacl->acl);
kfree(yacl->vol_acl);
kfree(yacl);
}
}
/*
* YFS.FetchOpaqueACL operation type
*/
static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
.name = "YFS.FetchOpaqueACL",
.op = yfs_FS_FetchOpaqueACL,
.deliver = yfs_deliver_fs_fetch_opaque_acl,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the YFS advanced ACLs for a file.
*/
void yfs_fs_fetch_opaque_acl(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSFetchOpaqueACL,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid),
sizeof(__be32) * 2 +
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, YFSFETCHOPAQUEACL);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_KERNEL);
}
/*
* YFS.StoreOpaqueACL2 operation type
*/
static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
.name = "YFS.StoreOpaqueACL2",
.op = yfs_FS_StoreOpaqueACL2,
.deliver = yfs_deliver_status_and_volsync,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the YFS ACL for a file.
*/
void yfs_fs_store_opaque_acl2(struct afs_operation *op)
{
struct afs_vnode_param *vp = &op->file[0];
struct afs_call *call;
struct afs_acl *acl = op->acl;
size_t size;
__be32 *bp;
_enter(",%x,{%llx:%llu},,",
key_serial(op->key), vp->fid.vid, vp->fid.vnode);
size = round_up(acl->size, 4);
call = afs_alloc_flat_call(op->net, &yfs_RXYFSStoreOpaqueACL2,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(__be32) + size,
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, YFSSTOREOPAQUEACL2);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vp->fid);
bp = xdr_encode_u32(bp, acl->size);
memcpy(bp, acl->data, acl->size);
if (acl->size != size)
memset((void *)bp + acl->size, 0, size - acl->size);
bp += size / sizeof(__be32);
yfs_check_req(call, bp);
trace_afs_make_fs_call(call, &vp->fid);
afs_make_op_call(op, call, GFP_KERNEL);
}