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a58823ac45
linux/fs/afs/yfsclient.c
David Howells a58823ac45 afs: Fix application of status and callback to be under same lock 
When applying the status and callback in the response of an operation,
apply them in the same critical section so that there's no race between
checking the callback state and checking status-dependent state (such as
the data version).

Fix this by:

 (1) Allocating a joint {status,callback} record (afs_status_cb) before
     calling the RPC function for each vnode for which the RPC reply
     contains a status or a status plus a callback.  A flag is set in the
     record to indicate if a callback was actually received.

 (2) These records are passed into the RPC functions to be filled in.  The
     afs_decode_status() and yfs_decode_status() functions are removed and
     the cb_lock is no longer taken.

 (3) xdr_decode_AFSFetchStatus() and xdr_decode_YFSFetchStatus() no longer
     update the vnode.

 (4) xdr_decode_AFSCallBack() and xdr_decode_YFSCallBack() no longer update
     the vnode.

 (5) vnodes, expected data-version numbers and callback break counters
     (cb_break) no longer need to be passed to the reply delivery
     functions.

     Note that, for the moment, the file locking functions still need
     access to both the call and the vnode at the same time.

 (6) afs_vnode_commit_status() is now given the cb_break value and the
     expected data_version and the task of applying the status and the
     callback to the vnode are now done here.

     This is done under a single taking of vnode->cb_lock.

 (7) afs_pages_written_back() is now called by afs_store_data() rather than
     by the reply delivery function.

     afs_pages_written_back() has been moved to before the call point and
     is now given the first and last page numbers rather than a pointer to
     the call.

 (8) The indicator from YFS.RemoveFile2 as to whether the target file
     actually got removed (status.abort_code == VNOVNODE) rather than
     merely dropping a link is now checked in afs_unlink rather than in
     xdr_decode_YFSFetchStatus().

Supplementary fixes:

 (*) afs_cache_permit() now gets the caller_access mask from the
     afs_status_cb object rather than picking it out of the vnode's status
     record.  afs_fetch_status() returns caller_access through its argument
     list for this purpose also.

 (*) afs_inode_init_from_status() now uses a write lock on cb_lock rather
     than a read lock and now sets the callback inside the same critical
     section.

Fixes: c435ee3455 ("afs: Overhaul the callback handling")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 16:25:21 +01:00

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/* YFS File Server client stubs
*
* Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*/
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/circ_buf.h>
#include <linux/iversion.h>
#include "internal.h"
#include "afs_fs.h"
#include "xdr_fs.h"
#include "protocol_yfs.h"
static const struct afs_fid afs_zero_fid;
static inline void afs_use_fs_server(struct afs_call *call, struct afs_cb_interest *cbi)
{
call->cbi = afs_get_cb_interest(cbi);
}
#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 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_mode(__be32 *bp, mode_t mode)
{
struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
x->mask = htonl(AFS_SET_MODE);
x->mode = htonl(mode & S_IALLUGO);
x->mtime_client = u64_to_xdr(0);
x->owner = u64_to_xdr(0);
x->group = u64_to_xdr(0);
return bp + xdr_size(x);
}
static __be32 *xdr_encode_YFSStoreStatus_mtime(__be32 *bp, const struct timespec64 *t)
{
struct yfs_xdr_YFSStoreStatus *x = (void *)bp;
s64 mtime = linux_to_yfs_time(t);
x->mask = htonl(AFS_SET_MTIME);
x->mode = htonl(0);
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_warning("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 < 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 a YFSFetchStatus block
*/
static int 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;
return 0;
}
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);
*_bp += xdr_size(xdr);
return 0;
bad:
xdr_dump_bad(*_bp);
return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
}
/*
* 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);
cb->version = ntohl(x->version);
cb->type = ntohl(x->type);
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 a reply that's a status, callback and volsync.
*/
static int yfs_deliver_fs_status_cb_and_volsync(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_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_YFSCallBack(&bp, call, call->out_scb);
xdr_decode_YFSVolSync(&bp, call->out_volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* 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)
{
const __be32 *bp;
int ret;
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_YFSVolSync(&bp, call->out_volsync);
_leave(" = 0 [done]");
return 0;
}
/*
* YFS.FetchStatus operation type
*/
static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = {
.name = "YFS.FetchStatus(vnode)",
.op = yfs_FS_FetchStatus,
.deliver = yfs_deliver_fs_status_cb_and_volsync,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the status information for a file.
*/
int yfs_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;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
call = afs_alloc_flat_call(net, &yfs_RXYFSFetchStatus_vnode,
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) {
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 = xdr_encode_u32(bp, YFSFETCHSTATUS);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vnode->fid);
yfs_check_req(call, bp);
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 YFS.FetchData64.
*/
static int yfs_deliver_fs_fetch_data64(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);
afs_extract_to_tmp64(call);
call->unmarshall++;
/* Fall through - and extract the returned data length */
case 1:
_debug("extract data length");
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
req->actual_len = be64_to_cpu(call->tmp64);
_debug("DATA length: %llu", req->actual_len);
req->remain = min(req->len, req->actual_len);
if (req->remain == 0)
goto no_more_data;
call->unmarshall++;
begin_page:
ASSERTCMP(req->index, <, req->nr_pages);
if (req->remain > PAGE_SIZE - req->offset)
size = PAGE_SIZE - req->offset;
else
size = req->remain;
call->bvec[0].bv_len = size;
call->bvec[0].bv_offset = req->offset;
call->bvec[0].bv_page = req->pages[req->index];
iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
ASSERTCMP(size, <=, PAGE_SIZE);
/* Fall through - and 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 */
iov_iter_discard(&call->iter, READ, 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,
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSCallBack) +
sizeof(struct yfs_xdr_YFSVolSync));
/* Fall through - and extract the metadata */
case 4:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_YFSCallBack(&bp, call, call->out_scb);
xdr_decode_YFSVolSync(&bp, call->out_volsync);
req->data_version = call->out_scb->status.data_version;
req->file_size = call->out_scb->status.size;
call->unmarshall++;
/* Fall through */
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 yfs_fetch_data_destructor(struct afs_call *call)
{
afs_put_read(call->read_request);
afs_flat_call_destructor(call);
}
/*
* 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 = yfs_fetch_data_destructor,
};
/*
* Fetch data from a file.
*/
int yfs_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;
_enter(",%x,{%llx:%llu},%llx,%llx",
key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode,
req->pos, req->len);
call = afs_alloc_flat_call(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 -ENOMEM;
call->key = fc->key;
call->out_scb = scb;
call->out_volsync = NULL;
call->read_request = req;
/* 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, &vnode->fid);
bp = xdr_encode_u64(bp, req->pos);
bp = xdr_encode_u64(bp, req->len);
yfs_check_req(call, bp);
refcount_inc(&req->usage);
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 for YFS.CreateFile or YFS.MakeDir.
*/
static int yfs_deliver_fs_create_vnode(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_YFSFid(&bp, call->out_fid);
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_YFSCallBack(&bp, call, call->out_scb);
xdr_decode_YFSVolSync(&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 = "YFS.CreateFile",
.op = yfs_FS_CreateFile,
.deliver = yfs_deliver_fs_create_vnode,
.destructor = afs_flat_call_destructor,
};
/*
* Create a file.
*/
int yfs_fs_create_file(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, rplsz;
__be32 *bp;
_enter("");
namesz = strlen(name);
reqsz = (sizeof(__be32) +
sizeof(__be32) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(namesz) +
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(net, &afs_RXFSCreateFile, reqsz, rplsz);
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 = xdr_encode_u32(bp, YFSCREATEFILE);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvnode->fid);
bp = xdr_encode_string(bp, name, namesz);
bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
yfs_check_req(call, bp);
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);
}
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.
*/
int yfs_fs_make_dir(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, rplsz;
__be32 *bp;
_enter("");
namesz = strlen(name);
reqsz = (sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(namesz) +
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(net, &yfs_RXFSMakeDir, reqsz, rplsz);
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 = xdr_encode_u32(bp, YFSMAKEDIR);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvnode->fid);
bp = xdr_encode_string(bp, name, namesz);
bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
yfs_check_req(call, bp);
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 a YFS.RemoveFile2 operation.
*/
static int yfs_deliver_fs_remove_file2(struct afs_call *call)
{
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;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_YFSFid(&bp, &fid);
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
/* Was deleted if vnode->status.abort_code == VNOVNODE. */
xdr_decode_YFSVolSync(&bp, call->out_volsync);
return 0;
}
/*
* 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,
.destructor = afs_flat_call_destructor,
};
/*
* Remove a file and retrieve new file status.
*/
int yfs_fs_remove_file2(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(dvnode);
size_t namesz;
__be32 *bp;
_enter("");
namesz = strlen(name);
call = afs_alloc_flat_call(net, &yfs_RXYFSRemoveFile2,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(namesz),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
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 = xdr_encode_u32(bp, YFSREMOVEFILE2);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvnode->fid);
bp = xdr_encode_string(bp, name, namesz);
yfs_check_req(call, bp);
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 a YFS.RemoveFile or YFS.RemoveDir operation.
*/
static int yfs_deliver_fs_remove(struct afs_call *call)
{
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_YFSVolSync(&bp, call->out_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,
};
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 file or directory
*/
int yfs_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;
__be32 *bp;
_enter("");
namesz = strlen(name);
call = afs_alloc_flat_call(
net, isdir ? &yfs_RXYFSRemoveDir : &yfs_RXYFSRemoveFile,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(namesz),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return -ENOMEM;
call->key = fc->key;
call->out_dir_scb = dvnode_scb;
/* marshall the parameters */
bp = call->request;
bp = xdr_encode_u32(bp, isdir ? YFSREMOVEDIR : YFSREMOVEFILE);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvnode->fid);
bp = xdr_encode_string(bp, name, namesz);
yfs_check_req(call, bp);
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 a YFS.Link operation.
*/
static int yfs_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;
bp = call->buffer;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_YFSVolSync(&bp, call->out_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.
*/
int yfs_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;
__be32 *bp;
_enter("");
namesz = strlen(name);
call = afs_alloc_flat_call(net, &yfs_RXYFSLink,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(namesz) +
sizeof(struct yfs_xdr_YFSFid),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
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 = xdr_encode_u32(bp, YFSLINK);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &dvnode->fid);
bp = xdr_encode_string(bp, name, namesz);
bp = xdr_encode_YFSFid(bp, &vnode->fid);
yfs_check_req(call, bp);
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 a YFS.Symlink operation.
*/
static int yfs_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_YFSFid(&bp, call->out_fid);
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
xdr_decode_YFSVolSync(&bp, call->out_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.
*/
int yfs_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 *vnode_scb)
{
struct afs_vnode *dvnode = fc->vnode;
struct afs_call *call;
struct afs_net *net = afs_v2net(dvnode);
size_t namesz, contents_sz;
__be32 *bp;
_enter("");
namesz = strlen(name);
contents_sz = strlen(contents);
call = afs_alloc_flat_call(net, &yfs_RXYFSSymlink,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(namesz) +
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 -ENOMEM;
call->key = fc->key;
call->out_dir_scb = dvnode_scb;
call->out_fid = newfid;
call->out_scb = vnode_scb;
/* 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, &dvnode->fid);
bp = xdr_encode_string(bp, name, namesz);
bp = xdr_encode_string(bp, contents, contents_sz);
bp = xdr_encode_YFSStoreStatus_mode(bp, S_IRWXUGO);
yfs_check_req(call, bp);
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 a YFS.Rename operation.
*/
static int yfs_deliver_fs_rename(struct afs_call *call)
{
const __be32 *bp;
int ret;
_enter("{%u}", call->unmarshall);
ret = afs_transfer_reply(call);
if (ret < 0)
return ret;
bp = call->buffer;
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
if (ret < 0)
return ret;
if (call->out_dir_scb != call->out_scb) {
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
}
xdr_decode_YFSVolSync(&bp, call->out_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.
*/
int yfs_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 o_namesz, n_namesz;
__be32 *bp;
_enter("");
o_namesz = strlen(orig_name);
n_namesz = strlen(new_name);
call = afs_alloc_flat_call(net, &yfs_RXYFSRename,
sizeof(__be32) +
sizeof(struct yfs_xdr_RPCFlags) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(o_namesz) +
sizeof(struct yfs_xdr_YFSFid) +
xdr_strlen(n_namesz),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
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 = xdr_encode_u32(bp, YFSRENAME);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &orig_dvnode->fid);
bp = xdr_encode_string(bp, orig_name, o_namesz);
bp = xdr_encode_YFSFid(bp, &new_dvnode->fid);
bp = xdr_encode_string(bp, new_name, n_namesz);
yfs_check_req(call, bp);
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);
}
/*
* 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.
*/
int yfs_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;
_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);
call = afs_alloc_flat_call(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 -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 = xdr_encode_u32(bp, YFSSTOREDATA64);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vnode->fid);
bp = xdr_encode_YFSStoreStatus_mtime(bp, &vnode->vfs_inode.i_mtime);
bp = xdr_encode_u64(bp, pos);
bp = xdr_encode_u64(bp, size);
bp = xdr_encode_u64(bp, i_size);
yfs_check_req(call, bp);
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);
}
/*
* 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 int yfs_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);
call = afs_alloc_flat_call(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 -ENOMEM;
call->key = fc->key;
call->out_scb = scb;
/* 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, &vnode->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);
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 YFS.StoreData64 if there's a change in
* file size, and YFS.StoreStatus otherwise.
*/
int yfs_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 (attr->ia_valid & ATTR_SIZE)
return yfs_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, &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 -ENOMEM;
call->key = fc->key;
call->out_scb = scb;
/* 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, &vnode->fid);
bp = xdr_encode_YFS_StoreStatus(bp, attr);
yfs_check_req(call, bp);
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 a YFS.GetVolumeStatus operation.
*/
static int yfs_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, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
/* Fall through - and 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, call->out_volstatus);
call->unmarshall++;
afs_extract_to_tmp(call);
/* Fall through - and 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 - and 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 - and 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 - and 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 - and 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 - and 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++;
/* Fall through */
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
*/
int yfs_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;
_enter("");
call = afs_alloc_flat_call(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 -ENOMEM;
call->key = fc->key;
call->out_volstatus = vs;
/* 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, vnode->fid.vid);
yfs_check_req(call, bp);
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);
}
/*
* 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
*/
int yfs_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;
_enter("");
call = afs_alloc_flat_call(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 -ENOMEM;
call->key = fc->key;
call->lvnode = vnode;
call->out_scb = scb;
/* 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, &vnode->fid);
bp = xdr_encode_u32(bp, type);
yfs_check_req(call, bp);
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 yfs_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;
_enter("");
call = afs_alloc_flat_call(net, &yfs_RXYFSExtendLock,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return -ENOMEM;
call->key = fc->key;
call->lvnode = vnode;
call->out_scb = scb;
/* 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, &vnode->fid);
yfs_check_req(call, bp);
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 yfs_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;
_enter("");
call = afs_alloc_flat_call(net, &yfs_RXYFSReleaseLock,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid),
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
if (!call)
return -ENOMEM;
call->key = fc->key;
call->lvnode = vnode;
call->out_scb = scb;
/* 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, &vnode->fid);
yfs_check_req(call, bp);
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);
}
/*
* YFS.FetchStatus operation type
*/
static const struct afs_call_type yfs_RXYFSFetchStatus = {
.name = "YFS.FetchStatus",
.op = yfs_FS_FetchStatus,
.deliver = yfs_deliver_fs_status_cb_and_volsync,
.destructor = afs_flat_call_destructor,
};
/*
* Fetch the status information for a fid without needing a vnode handle.
*/
int yfs_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;
_enter(",%x,{%llx:%llu},,",
key_serial(fc->key), fid->vid, fid->vnode);
call = afs_alloc_flat_call(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) {
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 = xdr_encode_u32(bp, YFSFETCHSTATUS);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, fid);
yfs_check_req(call, bp);
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 YFS.InlineBulkStatus call
*/
static int yfs_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++;
/* Extract the file status count and array in two steps */
/* Fall through */
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, sizeof(struct yfs_xdr_YFSFetchStatus));
/* 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_YFSFetchStatus(&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);
/* Extract the callback count and array in two steps */
/* Fall through */
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, sizeof(struct yfs_xdr_YFSCallBack));
/* 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_YFSCallBack(&bp, call, scb);
call->count++;
if (call->count < call->count2)
goto more_cbs;
afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
call->unmarshall++;
/* Fall through */
case 5:
ret = afs_extract_data(call, false);
if (ret < 0)
return ret;
bp = call->buffer;
xdr_decode_YFSVolSync(&bp, call->out_volsync);
call->unmarshall++;
/* Fall through */
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
*/
int yfs_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;
_enter(",%x,{%llx:%llu},%u",
key_serial(fc->key), fids[0].vid, fids[1].vnode, nr_fids);
call = afs_alloc_flat_call(net, &yfs_RXYFSInlineBulkStatus,
sizeof(__be32) +
sizeof(__be32) +
sizeof(__be32) +
sizeof(struct yfs_xdr_YFSFid) * nr_fids,
sizeof(struct yfs_xdr_YFSFetchStatus));
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 = xdr_encode_u32(bp, YFSINLINEBULKSTATUS);
bp = xdr_encode_u32(bp, 0); /* RPCFlags */
bp = xdr_encode_u32(bp, nr_fids);
for (i = 0; i < nr_fids; i++)
bp = xdr_encode_YFSFid(bp, &fids[i]);
yfs_check_req(call, bp);
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 YFS.FetchOpaqueACL.
*/
static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
{
struct yfs_acl *yacl = call->out_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++;
/* 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 {
iov_iter_discard(&call->iter, READ, size);
}
call->unmarshall++;
/* Extract the file ACL */
case 2:
ret = afs_extract_data(call, true);
if (ret < 0)
return ret;
afs_extract_to_tmp(call);
call->unmarshall++;
/* 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 {
iov_iter_discard(&call->iter, READ, size);
}
call->unmarshall++;
/* 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++;
/* 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++);
ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
if (ret < 0)
return ret;
xdr_decode_YFSVolSync(&bp, call->out_volsync);
call->unmarshall++;
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.
*/
struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc,
struct yfs_acl *yacl,
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, &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) {
fc->ac.error = -ENOMEM;
return ERR_PTR(-ENOMEM);
}
call->key = fc->key;
call->out_yacl = yacl;
call->out_scb = scb;
call->out_volsync = NULL;
/* 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, &vnode->fid);
yfs_check_req(call, bp);
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 yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
}
/*
* 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.
*/
int yfs_fs_store_opaque_acl2(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, &yfs_RXYFSStoreStatus,
sizeof(__be32) * 2 +
sizeof(struct yfs_xdr_YFSFid) +
sizeof(__be32) + size,
sizeof(struct yfs_xdr_YFSFetchStatus) +
sizeof(struct yfs_xdr_YFSVolSync));
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 = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
bp = xdr_encode_u32(bp, 0); /* RPC flags */
bp = xdr_encode_YFSFid(bp, &vnode->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);
yfs_check_req(call, bp);
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);
}
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