/*
* 3. Encode arguments of an RPC call
*/
static void
call_encode(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_rqst *req = task->tk_rqstp;
unsigned int bufsiz;
kxdrproc_t encode;
int status;
u32 *p;
dprintk("RPC: %4d call_encode (status %d)\n",
task->tk_pid, task->tk_status);
task->tk_action = call_transmit;
/* Default buffer setup */
bufsiz = rpcproc_bufsiz(clnt, task->tk_proc)+RPC_SLACK_SPACE;
req->rq_svec[0].iov_base = task->tk_buffer;
req->rq_svec[0].iov_len = bufsiz;
req->rq_slen = 0;
req->rq_snr = 1;
req->rq_rvec[0].iov_base = task->tk_buffer;
req->rq_rvec[0].iov_len = bufsiz;
req->rq_rlen = bufsiz;
req->rq_rnr = 1;
if (task->tk_proc > clnt->cl_maxproc) {
printk(KERN_WARNING "%s (vers %d): bad procedure number %d\n",
clnt->cl_protname, clnt->cl_vers, task->tk_proc);
rpc_exit(task, -EIO);
return;
}
/* Zero buffer so we have automatic zero-padding of opaque & string */
memset(task->tk_buffer, 0, bufsiz);
/* Encode header and provided arguments */
encode = rpcproc_encode(clnt, task->tk_proc);
if (!(p = call_header(task))) {
printk("RPC: call_header failed, exit EIO\n");
rpc_exit(task, -EIO);
} else
if ((status = encode(req, p, task->tk_argp)) < 0) {
printk(KERN_WARNING "%s: can't encode arguments: %d\n",
clnt->cl_protname, -status);
rpc_exit(task, status);
}
}
/*
* 2. Allocate the buffer. For details, see sched.c:rpc_malloc.
* (Note: buffer memory is freed in rpc_task_release).
*/
static void
call_allocate(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
unsigned int bufsiz;
dprintk("RPC: %4d call_allocate (status %d)\n",
task->tk_pid, task->tk_status);
task->tk_action = call_encode;
if (task->tk_buffer)
return;
/* FIXME: compute buffer requirements more exactly using
* auth->au_wslack */
bufsiz = rpcproc_bufsiz(clnt, task->tk_proc) + RPC_SLACK_SPACE;
if ((task->tk_buffer = rpc_malloc(task, bufsiz)) != NULL)
return;
printk("RPC: buffer allocation failed for task %p\n", task);
if (!signalled()) {
xprt_release(task);
task->tk_action = call_reserve;
rpc_delay(task, HZ);
return;
}
rpc_exit(task, -ERESTARTSYS);
}
/*
* 1. Reserve an RPC call slot
*/
static void
call_reserve(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
dprintk("RPC: %4d call_reserve\n", task->tk_pid);
if (!clnt->cl_port) {
printk(KERN_NOTICE "%s: couldn't bind to server %s - %s.\n",
clnt->cl_protname, clnt->cl_server,
clnt->cl_softrtry? "giving up" : "retrying");
if (!clnt->cl_softrtry) {
rpc_delay(task, 5*HZ);
return;
}
rpc_exit(task, -EIO);
return;
}
if (!rpcauth_uptodatecred(task)) {
task->tk_action = call_refresh;
return;
}
task->tk_action = call_reserveresult;
task->tk_timeout = clnt->cl_timeout.to_resrvval;
task->tk_status = 0;
clnt->cl_stats->rpccnt++;
xprt_reserve(task);
}
/**
* nfs_pgio_prepare - Prepare pageio hdr to go over the wire
* @task: The current task
* @calldata: pageio header to prepare
*/
static void nfs_pgio_prepare(struct rpc_task *task, void *calldata)
{
struct nfs_pgio_header *hdr = calldata;
int err;
err = NFS_PROTO(hdr->inode)->pgio_rpc_prepare(task, hdr);
if (err)
rpc_exit(task, err);
}
/*
* 6a. Handle RPC timeout
* We do not release the request slot, so we keep using the
* same XID for all retransmits.
*/
static void
call_timeout(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_rqst *req = task->tk_rqstp;
if (req) {
struct rpc_timeout *to = &req->rq_timeout;
if (xprt_adjust_timeout(to)) {
dprintk("RPC: %4d call_timeout (minor timeo)\n",
task->tk_pid);
goto minor_timeout;
}
to->to_initval <<= 1;
if (to->to_initval > to->to_maxval)
to->to_initval = to->to_maxval;
}
dprintk("RPC: %4d call_timeout (major timeo)\n", task->tk_pid);
if (clnt->cl_softrtry) {
if (clnt->cl_chatty && !task->tk_exit)
printk("%s: server %s not responding, timed out\n",
clnt->cl_protname, clnt->cl_server);
rpc_exit(task, -EIO);
return;
}
if (clnt->cl_chatty && !(task->tk_flags & RPC_CALL_MAJORSEEN)) {
task->tk_flags |= RPC_CALL_MAJORSEEN;
if (req)
printk("%s: server %s not responding, still trying\n",
clnt->cl_protname, clnt->cl_server);
else
printk("%s: task %d can't get a request slot\n",
clnt->cl_protname, task->tk_pid);
}
if (clnt->cl_autobind)
clnt->cl_port = 0;
minor_timeout:
if (!clnt->cl_port) {
task->tk_action = call_bind;
} else if (!req) {
task->tk_action = call_reserve;
} else if (req->rq_damaged) {
task->tk_action = call_encode;
clnt->cl_stats->rpcretrans++;
} else {
task->tk_action = call_transmit;
clnt->cl_stats->rpcretrans++;
}
task->tk_status = 0;
}
/*
* 1b. Grok the result of xprt_reserve()
*/
static void
call_reserveresult(struct rpc_task *task)
{
int status = task->tk_status;
dprintk("RPC: %4d call_reserveresult (status %d)\n",
task->tk_pid, task->tk_status);
/*
* After a call to xprt_reserve(), we must have either
* a request slot or else an error status.
*/
if ((task->tk_status >= 0 && !task->tk_rqstp) ||
(task->tk_status < 0 && task->tk_rqstp))
printk(KERN_ERR "call_reserveresult: status=%d, request=%p??\n",
task->tk_status, task->tk_rqstp);
if (task->tk_status >= 0) {
task->tk_action = call_allocate;
return;
}
task->tk_status = 0;
switch (status) {
case -EAGAIN:
case -ENOBUFS:
task->tk_timeout = task->tk_client->cl_timeout.to_resrvval;
task->tk_action = call_reserve;
break;
case -ETIMEDOUT:
dprintk("RPC: task timed out\n");
task->tk_action = call_timeout;
break;
default:
if (!task->tk_rqstp) {
printk(KERN_INFO "RPC: task has no request, exit EIO\n");
rpc_exit(task, -EIO);
} else
rpc_exit(task, status);
}
}
/*
* 7. Decode the RPC reply
*/
static void
call_decode(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_rqst *req = task->tk_rqstp;
kxdrproc_t decode = rpcproc_decode(clnt, task->tk_proc);
u32 *p;
dprintk("RPC: %4d call_decode (status %d)\n",
task->tk_pid, task->tk_status);
if (clnt->cl_chatty && (task->tk_flags & RPC_CALL_MAJORSEEN)) {
printk("%s: server %s OK\n",
clnt->cl_protname, clnt->cl_server);
task->tk_flags &= ~RPC_CALL_MAJORSEEN;
}
if (task->tk_status < 12) {
printk("%s: too small RPC reply size (%d bytes)\n",
clnt->cl_protname, task->tk_status);
rpc_exit(task, -EIO);
return;
}
/* Verify the RPC header */
if (!(p = call_verify(task)))
return;
/*
* The following is an NFS-specific hack to cater for setuid
* processes whose uid is mapped to nobody on the server.
*/
if (task->tk_client->cl_prog == 100003 &&
(ntohl(*p) == NFSERR_ACCES || ntohl(*p) == NFSERR_PERM)) {
if (RPC_IS_SETUID(task) && (task->tk_suid_retry)--) {
dprintk("RPC: %4d retry squashed uid\n", task->tk_pid);
task->tk_flags ^= RPC_CALL_REALUID;
task->tk_action = call_encode;
return;
}
}
task->tk_action = NULL;
task->tk_status = decode(req, p, task->tk_resp);
dprintk("RPC: %4d call_decode result %d\n", task->tk_pid,
task->tk_status);
}
/*
* Kill all tasks for the given client.
* XXX: kill their descendants as well?
*/
void
rpc_killall_tasks(struct rpc_clnt *clnt)
{
struct rpc_task **q, *rovr;
dprintk("RPC: killing all tasks for client %p\n", clnt);
/* N.B. Why bother to inhibit? Nothing blocks here ... */
rpc_inhibit++;
for (q = &all_tasks; (rovr = *q); q = &rovr->tk_next_task) {
if (!clnt || rovr->tk_client == clnt) {
rovr->tk_flags |= RPC_TASK_KILLED;
rpc_exit(rovr, -EIO);
rpc_wake_up_task(rovr);
}
}
rpc_inhibit--;
}
void nfs_reqlist_exit(struct nfs_server *server)
{
struct nfs_reqlist *cache;
lock_kernel();
cache = server->rw_requests;
if (!cache)
goto out;
dprintk("NFS: reqlist_exit (ptr %p rpc %p)\n", cache, cache->task);
while (cache->task) {
rpc_exit(cache->task, 0);
rpc_wake_up_task(cache->task);
interruptible_sleep_on_timeout(&cache->request_wait, 1 * HZ);
}
out:
unlock_kernel();
}
/*
* 1b. Grok the result of xprt_reserve()
*/
static void
call_reserveresult(struct rpc_task *task)
{
dprintk("RPC: %4d call_reserveresult (status %d)\n",
task->tk_pid, task->tk_status);
/*
* After a call to xprt_reserve(), we must have either
* a request slot or else an error status.
*/
if ((task->tk_status >= 0 && !task->tk_rqstp) ||
(task->tk_status < 0 && task->tk_rqstp))
printk("call_reserveresult: status=%d, request=%p??\n",
task->tk_status, task->tk_rqstp);
if (task->tk_status >= 0) {
task->tk_action = call_allocate;
goto out;
} else if (task->tk_status == -EAGAIN) {
task->tk_timeout = task->tk_client->cl_timeout.to_resrvval;
task->tk_status = 0;
xprt_reserve(task);
goto out;
} else if (task->tk_status == -ETIMEDOUT) {
dprintk("RPC: task timed out\n");
task->tk_action = call_timeout;
goto out;
} else {
task->tk_action = NULL;
}
if (!task->tk_rqstp) {
printk("RPC: task has no request, exit EIO\n");
rpc_exit(task, -EIO);
}
out:
return;
}
/*
* 1. Reserve an RPC call slot
*/
static void
call_reserve(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
if (task->tk_msg.rpc_proc > clnt->cl_maxproc) {
printk(KERN_WARNING "%s (vers %d): bad procedure number %d\n",
clnt->cl_protname, clnt->cl_vers, task->tk_msg.rpc_proc);
rpc_exit(task, -EIO);
return;
}
dprintk("RPC: %4d call_reserve\n", task->tk_pid);
if (!rpcauth_uptodatecred(task)) {
task->tk_action = call_refresh;
return;
}
task->tk_status = 0;
task->tk_action = call_reserveresult;
task->tk_timeout = clnt->cl_timeout.to_resrvval;
clnt->cl_stats->rpccnt++;
xprt_reserve(task);
}
/*
* Obtain the port for a given RPC service on a given host. This one can
* be called for an ongoing RPC request.
*/
void
rpc_getport(struct rpc_task *task, struct rpc_clnt *clnt)
{
struct rpc_portmap *map = clnt->cl_pmap;
struct sockaddr_in *sap = &clnt->cl_xprt->addr;
struct rpc_message msg = {
.rpc_proc = &pmap_procedures[PMAP_GETPORT],
.rpc_argp = map,
.rpc_resp = &clnt->cl_port,
.rpc_cred = NULL
};
struct rpc_clnt *pmap_clnt;
struct rpc_task *child;
dprintk("RPC: %4d rpc_getport(%s, %d, %d, %d)\n",
task->tk_pid, clnt->cl_server,
map->pm_prog, map->pm_vers, map->pm_prot);
/* Autobind on cloned rpc clients is discouraged */
BUG_ON(clnt->cl_parent != clnt);
spin_lock(&pmap_lock);
if (map->pm_binding) {
rpc_sleep_on(&map->pm_bindwait, task, NULL, NULL);
spin_unlock(&pmap_lock);
return;
}
map->pm_binding = 1;
spin_unlock(&pmap_lock);
pmap_clnt = pmap_create(clnt->cl_server, sap, map->pm_prot, 0);
if (IS_ERR(pmap_clnt)) {
task->tk_status = PTR_ERR(pmap_clnt);
goto bailout;
}
task->tk_status = 0;
/*
* Note: rpc_new_child will release client after a failure.
*/
if (!(child = rpc_new_child(pmap_clnt, task)))
goto bailout;
/* Setup the call info struct */
rpc_call_setup(child, &msg, 0);
/* ... and run the child task */
rpc_run_child(task, child, pmap_getport_done);
return;
bailout:
spin_lock(&pmap_lock);
map->pm_binding = 0;
rpc_wake_up(&map->pm_bindwait);
spin_unlock(&pmap_lock);
rpc_exit(task, -EIO);
}
#ifdef CONFIG_ROOT_NFS
int
rpc_getport_external(struct sockaddr_in *sin, __u32 prog, __u32 vers, int prot)
{
struct rpc_portmap map = {
.pm_prog = prog,
.pm_vers = vers,
.pm_prot = prot,
.pm_port = 0
};
struct rpc_clnt *pmap_clnt;
char hostname[32];
int status;
dprintk("RPC: rpc_getport_external(%u.%u.%u.%u, %d, %d, %d)\n",
NIPQUAD(sin->sin_addr.s_addr), prog, vers, prot);
sprintf(hostname, "%u.%u.%u.%u", NIPQUAD(sin->sin_addr.s_addr));
pmap_clnt = pmap_create(hostname, sin, prot, 0);
if (IS_ERR(pmap_clnt))
return PTR_ERR(pmap_clnt);
/* Setup the call info struct */
status = rpc_call(pmap_clnt, PMAP_GETPORT, &map, &map.pm_port, 0);
if (status >= 0) {
if (map.pm_port != 0)
return map.pm_port;
status = -EACCES;
}
return status;
}
#endif
static void
pmap_getport_done(struct rpc_task *task)
{
struct rpc_clnt *clnt = task->tk_client;
struct rpc_xprt *xprt = task->tk_xprt;
struct rpc_portmap *map = clnt->cl_pmap;
dprintk("RPC: %4d pmap_getport_done(status %d, port %d)\n",
task->tk_pid, task->tk_status, clnt->cl_port);
xprt->ops->set_port(xprt, 0);
if (task->tk_status < 0) {
/* Make the calling task exit with an error */
task->tk_action = rpc_exit_task;
} else if (clnt->cl_port == 0) {
/* Program not registered */
rpc_exit(task, -EACCES);
} else {
xprt->ops->set_port(xprt, clnt->cl_port);
clnt->cl_port = htons(clnt->cl_port);
}
spin_lock(&pmap_lock);
map->pm_binding = 0;
rpc_wake_up(&map->pm_bindwait);
spin_unlock(&pmap_lock);
}
/*
* Set or unset a port registration with the local portmapper.
* port == 0 means unregister, port != 0 means register.
*/
int
rpc_register(u32 prog, u32 vers, int prot, unsigned short port, int *okay)
{
struct sockaddr_in sin;
struct rpc_portmap map;
struct rpc_clnt *pmap_clnt;
int error = 0;
dprintk("RPC: registering (%d, %d, %d, %d) with portmapper.\n",
prog, vers, prot, port);
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
pmap_clnt = pmap_create("localhost", &sin, IPPROTO_UDP, 1);
if (IS_ERR(pmap_clnt)) {
error = PTR_ERR(pmap_clnt);
dprintk("RPC: couldn't create pmap client. Error = %d\n", error);
return error;
}
map.pm_prog = prog;
map.pm_vers = vers;
map.pm_prot = prot;
map.pm_port = port;
error = rpc_call(pmap_clnt, port? PMAP_SET : PMAP_UNSET,
&map, okay, 0);
if (error < 0) {
printk(KERN_WARNING
"RPC: failed to contact portmap (errno %d).\n",
error);
}
dprintk("RPC: registration status %d/%d\n", error, *okay);
/* Client deleted automatically because cl_oneshot == 1 */
return error;
}
static struct rpc_clnt *
pmap_create(char *hostname, struct sockaddr_in *srvaddr, int proto, int privileged)
{
struct rpc_xprt *xprt;
struct rpc_clnt *clnt;
/* printk("pmap: create xprt\n"); */
xprt = xprt_create_proto(proto, srvaddr, NULL);
if (IS_ERR(xprt))
return (struct rpc_clnt *)xprt;
xprt->ops->set_port(xprt, RPC_PMAP_PORT);
if (!privileged)
xprt->resvport = 0;
/* printk("pmap: create clnt\n"); */
clnt = rpc_new_client(xprt, hostname,
&pmap_program, RPC_PMAP_VERSION,
RPC_AUTH_UNIX);
if (!IS_ERR(clnt)) {
clnt->cl_softrtry = 1;
clnt->cl_oneshot = 1;
}
return clnt;
}
/*
* XDR encode/decode functions for PMAP
*/
static int
xdr_encode_mapping(struct rpc_rqst *req, u32 *p, struct rpc_portmap *map)
{
dprintk("RPC: xdr_encode_mapping(%d, %d, %d, %d)\n",
map->pm_prog, map->pm_vers, map->pm_prot, map->pm_port);
*p++ = htonl(map->pm_prog);
*p++ = htonl(map->pm_vers);
*p++ = htonl(map->pm_prot);
*p++ = htonl(map->pm_port);
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
return 0;
}
static int
xdr_decode_port(struct rpc_rqst *req, u32 *p, unsigned short *portp)
{
*portp = (unsigned short) ntohl(*p++);
return 0;
}
/*
* This is the RPC `scheduler' (or rather, the finite state machine).
*/
static int
__rpc_execute(struct rpc_task *task)
{
unsigned long oldflags;
int status = 0;
dprintk("RPC: %4d rpc_execute flgs %x\n",
task->tk_pid, task->tk_flags);
if (!RPC_IS_RUNNING(task)) {
printk(KERN_WARNING "RPC: rpc_execute called for sleeping task!!\n");
return 0;
}
while (1) {
/*
* Execute any pending callback.
*/
if (task->tk_flags & RPC_TASK_CALLBACK) {
/* Define a callback save pointer */
void (*save_callback)(struct rpc_task *);
task->tk_flags &= ~RPC_TASK_CALLBACK;
/*
* If a callback exists, save it, reset it,
* call it.
* The save is needed to stop from resetting
* another callback set within the callback handler
* - Dave
*/
if (task->tk_callback) {
save_callback=task->tk_callback;
task->tk_callback=NULL;
save_callback(task);
}
}
/*
* No handler for next step means exit.
*/
if (!task->tk_action)
break;
/*
* Perform the next FSM step.
* tk_action may be NULL when the task has been killed
* by someone else.
*/
if (RPC_IS_RUNNING(task) && task->tk_action)
task->tk_action(task);
/*
* Check whether task is sleeping.
* Note that if the task may go to sleep in tk_action,
* and the RPC reply arrives before we get here, it will
* have state RUNNING, but will still be on schedq.
*/
save_flags(oldflags); cli();
if (RPC_IS_RUNNING(task)) {
if (task->tk_rpcwait == &schedq)
rpc_remove_wait_queue(task);
} else while (!RPC_IS_RUNNING(task)) {
if (RPC_IS_ASYNC(task)) {
restore_flags(oldflags);
return 0;
}
/* sync task: sleep here */
dprintk("RPC: %4d sync task going to sleep\n",
task->tk_pid);
if (current->pid == rpciod_pid)
printk(KERN_ERR "RPC: rpciod waiting on sync task!\n");
sleep_on(&task->tk_wait);
/*
* When the task received a signal, remove from
* any queues etc, and make runnable again.
*/
if (signalled())
__rpc_wake_up(task);
dprintk("RPC: %4d sync task resuming\n",
task->tk_pid);
}
restore_flags(oldflags);
/*
* When a sync task receives a signal, it exits with
* -ERESTARTSYS. In order to catch any callbacks that
* clean up after sleeping on some queue, we don't
* break the loop here, but go around once more.
*/
if (!RPC_IS_ASYNC(task) && signalled()) {
dprintk("RPC: %4d got signal\n", task->tk_pid);
rpc_exit(task, -ERESTARTSYS);
}
}
dprintk("RPC: %4d exit() = %d\n", task->tk_pid, task->tk_status);
if (task->tk_exit) {
status = task->tk_status;
task->tk_exit(task);
}
return status;
}
void vcos_llthread_exit(void) {
/* vcos_llthread_delete might have been called by this point! */
vcos_assert(rtos_get_cpu_number() == 1);
rpc_exit(0);
}
/*
* Reply header verification
*/
static u32 *
call_verify(struct rpc_task *task)
{
u32 *p = task->tk_buffer, n;
p += 1; /* skip XID */
if ((n = ntohl(*p++)) != RPC_REPLY) {
printk("call_verify: not an RPC reply: %x\n", n);
goto garbage;
}
if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) {
int error = -EACCES;
if ((n = ntohl(*p++)) != RPC_AUTH_ERROR) {
printk("call_verify: RPC call rejected: %x\n", n);
} else
switch ((n = ntohl(*p++))) {
case RPC_AUTH_REJECTEDCRED:
case RPC_AUTH_REJECTEDVERF:
if (!task->tk_cred_retry--)
break;
dprintk("RPC: %4d call_verify: retry stale creds\n",
task->tk_pid);
rpcauth_invalcred(task);
task->tk_action = call_refresh;
return NULL;
case RPC_AUTH_BADCRED:
case RPC_AUTH_BADVERF:
/* possibly garbled cred/verf? */
if (!task->tk_garb_retry--)
break;
dprintk("RPC: %4d call_verify: retry garbled creds\n",
task->tk_pid);
task->tk_action = call_encode;
return NULL;
case RPC_AUTH_TOOWEAK:
printk("call_verify: server requires stronger "
"authentication.\n");
default:
printk("call_verify: unknown auth error: %x\n", n);
error = -EIO;
}
dprintk("RPC: %4d call_verify: call rejected %d\n",
task->tk_pid, n);
rpc_exit(task, error);
return NULL;
}
if (!(p = rpcauth_checkverf(task, p))) {
printk("call_verify: auth check failed\n");
goto garbage; /* bad verifier, retry */
}
switch ((n = ntohl(*p++))) {
case RPC_SUCCESS:
return p;
case RPC_GARBAGE_ARGS:
break; /* retry */
default:
printk("call_verify: server accept status: %x\n", n);
/* Also retry */
}
garbage:
dprintk("RPC: %4d call_verify: server saw garbage\n", task->tk_pid);
task->tk_client->cl_stats->rpcgarbage++;
if (task->tk_garb_retry--) {
printk("RPC: garbage, retrying %4d\n", task->tk_pid);
task->tk_action = call_encode;
return NULL;
}
printk("RPC: garbage, exit EIO\n");
rpc_exit(task, -EIO);
return NULL;
}
static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
struct nfs_lock_context *lock, loff_t offset, loff_t len)
{
struct inode *inode = file_inode(filep);
struct nfs_server *server = NFS_SERVER(inode);
struct nfs42_falloc_args args = {
.falloc_fh = NFS_FH(inode),
.falloc_offset = offset,
.falloc_length = len,
.falloc_bitmask = server->cache_consistency_bitmask,
};
struct nfs42_falloc_res res = {
.falloc_server = server,
};
int status;
msg->rpc_argp = &args;
msg->rpc_resp = &res;
status = nfs4_set_rw_stateid(&args.falloc_stateid, lock->open_context,
lock, FMODE_WRITE);
if (status)
return status;
res.falloc_fattr = nfs_alloc_fattr();
if (!res.falloc_fattr)
return -ENOMEM;
status = nfs4_call_sync(server->client, server, msg,
&args.seq_args, &res.seq_res, 0);
if (status == 0)
status = nfs_post_op_update_inode(inode, res.falloc_fattr);
kfree(res.falloc_fattr);
return status;
}
static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
loff_t offset, loff_t len)
{
struct nfs_server *server = NFS_SERVER(file_inode(filep));
struct nfs4_exception exception = { };
struct nfs_lock_context *lock;
int err;
lock = nfs_get_lock_context(nfs_file_open_context(filep));
if (IS_ERR(lock))
return PTR_ERR(lock);
exception.inode = file_inode(filep);
exception.state = lock->open_context->state;
do {
err = _nfs42_proc_fallocate(msg, filep, lock, offset, len);
if (err == -ENOTSUPP) {
err = -EOPNOTSUPP;
break;
}
err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
nfs_put_lock_context(lock);
return err;
}
int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ALLOCATE],
};
struct inode *inode = file_inode(filep);
int err;
if (!nfs_server_capable(inode, NFS_CAP_ALLOCATE))
return -EOPNOTSUPP;
inode_lock(inode);
err = nfs42_proc_fallocate(&msg, filep, offset, len);
if (err == -EOPNOTSUPP)
NFS_SERVER(inode)->caps &= ~NFS_CAP_ALLOCATE;
inode_unlock(inode);
return err;
}
int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE],
};
struct inode *inode = file_inode(filep);
int err;
if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
return -EOPNOTSUPP;
inode_lock(inode);
err = nfs_sync_inode(inode);
if (err)
goto out_unlock;
err = nfs42_proc_fallocate(&msg, filep, offset, len);
if (err == 0)
truncate_pagecache_range(inode, offset, (offset + len) -1);
if (err == -EOPNOTSUPP)
NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
out_unlock:
inode_unlock(inode);
return err;
}
static ssize_t _nfs42_proc_copy(struct file *src, loff_t pos_src,
struct nfs_lock_context *src_lock,
struct file *dst, loff_t pos_dst,
struct nfs_lock_context *dst_lock,
size_t count)
{
struct nfs42_copy_args args = {
.src_fh = NFS_FH(file_inode(src)),
.src_pos = pos_src,
.dst_fh = NFS_FH(file_inode(dst)),
.dst_pos = pos_dst,
.count = count,
};
struct nfs42_copy_res res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COPY],
.rpc_argp = &args,
.rpc_resp = &res,
};
struct inode *dst_inode = file_inode(dst);
struct nfs_server *server = NFS_SERVER(dst_inode);
int status;
status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
src_lock, FMODE_READ);
if (status)
return status;
status = nfs_filemap_write_and_wait_range(file_inode(src)->i_mapping,
pos_src, pos_src + (loff_t)count - 1);
if (status)
return status;
status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
dst_lock, FMODE_WRITE);
if (status)
return status;
status = nfs_sync_inode(dst_inode);
if (status)
return status;
status = nfs4_call_sync(server->client, server, &msg,
&args.seq_args, &res.seq_res, 0);
if (status == -ENOTSUPP)
server->caps &= ~NFS_CAP_COPY;
if (status)
return status;
if (res.write_res.verifier.committed != NFS_FILE_SYNC) {
status = nfs_commit_file(dst, &res.write_res.verifier.verifier);
if (status)
return status;
}
truncate_pagecache_range(dst_inode, pos_dst,
pos_dst + res.write_res.count);
return res.write_res.count;
}
ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
struct file *dst, loff_t pos_dst,
size_t count)
{
struct nfs_server *server = NFS_SERVER(file_inode(dst));
struct nfs_lock_context *src_lock;
struct nfs_lock_context *dst_lock;
struct nfs4_exception src_exception = { };
struct nfs4_exception dst_exception = { };
ssize_t err, err2;
if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
return -EOPNOTSUPP;
src_lock = nfs_get_lock_context(nfs_file_open_context(src));
if (IS_ERR(src_lock))
return PTR_ERR(src_lock);
src_exception.inode = file_inode(src);
src_exception.state = src_lock->open_context->state;
dst_lock = nfs_get_lock_context(nfs_file_open_context(dst));
if (IS_ERR(dst_lock)) {
err = PTR_ERR(dst_lock);
goto out_put_src_lock;
}
dst_exception.inode = file_inode(dst);
dst_exception.state = dst_lock->open_context->state;
do {
inode_lock(file_inode(dst));
err = _nfs42_proc_copy(src, pos_src, src_lock,
dst, pos_dst, dst_lock, count);
inode_unlock(file_inode(dst));
if (err == -ENOTSUPP) {
err = -EOPNOTSUPP;
break;
}
err2 = nfs4_handle_exception(server, err, &src_exception);
err = nfs4_handle_exception(server, err, &dst_exception);
if (!err)
err = err2;
} while (src_exception.retry || dst_exception.retry);
nfs_put_lock_context(dst_lock);
out_put_src_lock:
nfs_put_lock_context(src_lock);
return err;
}
static loff_t _nfs42_proc_llseek(struct file *filep,
struct nfs_lock_context *lock, loff_t offset, int whence)
{
struct inode *inode = file_inode(filep);
struct nfs42_seek_args args = {
.sa_fh = NFS_FH(inode),
.sa_offset = offset,
.sa_what = (whence == SEEK_HOLE) ?
NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA,
};
struct nfs42_seek_res res;
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK],
.rpc_argp = &args,
.rpc_resp = &res,
};
struct nfs_server *server = NFS_SERVER(inode);
int status;
if (!nfs_server_capable(inode, NFS_CAP_SEEK))
return -ENOTSUPP;
status = nfs4_set_rw_stateid(&args.sa_stateid, lock->open_context,
lock, FMODE_READ);
if (status)
return status;
status = nfs_filemap_write_and_wait_range(inode->i_mapping,
offset, LLONG_MAX);
if (status)
return status;
status = nfs4_call_sync(server->client, server, &msg,
&args.seq_args, &res.seq_res, 0);
if (status == -ENOTSUPP)
server->caps &= ~NFS_CAP_SEEK;
if (status)
return status;
return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
}
loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
struct nfs_server *server = NFS_SERVER(file_inode(filep));
struct nfs4_exception exception = { };
struct nfs_lock_context *lock;
loff_t err;
lock = nfs_get_lock_context(nfs_file_open_context(filep));
if (IS_ERR(lock))
return PTR_ERR(lock);
exception.inode = file_inode(filep);
exception.state = lock->open_context->state;
do {
err = _nfs42_proc_llseek(filep, lock, offset, whence);
if (err >= 0)
break;
if (err == -ENOTSUPP) {
err = -EOPNOTSUPP;
break;
}
err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
nfs_put_lock_context(lock);
return err;
}
static void
nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
{
struct nfs42_layoutstat_data *data = calldata;
struct inode *inode = data->inode;
struct nfs_server *server = NFS_SERVER(inode);
struct pnfs_layout_hdr *lo;
spin_lock(&inode->i_lock);
lo = NFS_I(inode)->layout;
if (!pnfs_layout_is_valid(lo)) {
spin_unlock(&inode->i_lock);
rpc_exit(task, 0);
return;
}
nfs4_stateid_copy(&data->args.stateid, &lo->plh_stateid);
spin_unlock(&inode->i_lock);
nfs41_setup_sequence(nfs4_get_session(server), &data->args.seq_args,
&data->res.seq_res, task);
}
static void
nfs42_layoutstat_done(struct rpc_task *task, void *calldata)
{
struct nfs42_layoutstat_data *data = calldata;
struct inode *inode = data->inode;
struct pnfs_layout_hdr *lo;
if (!nfs4_sequence_done(task, &data->res.seq_res))
return;
switch (task->tk_status) {
case 0:
break;
case -NFS4ERR_EXPIRED:
case -NFS4ERR_ADMIN_REVOKED:
case -NFS4ERR_DELEG_REVOKED:
case -NFS4ERR_STALE_STATEID:
case -NFS4ERR_BAD_STATEID:
spin_lock(&inode->i_lock);
lo = NFS_I(inode)->layout;
if (pnfs_layout_is_valid(lo) &&
nfs4_stateid_match(&data->args.stateid,
&lo->plh_stateid)) {
LIST_HEAD(head);
/*
* Mark the bad layout state as invalid, then retry
* with the current stateid.
*/
pnfs_mark_layout_stateid_invalid(lo, &head);
spin_unlock(&inode->i_lock);
pnfs_free_lseg_list(&head);
} else
spin_unlock(&inode->i_lock);
break;
case -NFS4ERR_OLD_STATEID:
spin_lock(&inode->i_lock);
lo = NFS_I(inode)->layout;
if (pnfs_layout_is_valid(lo) &&
nfs4_stateid_match_other(&data->args.stateid,
&lo->plh_stateid)) {
/* Do we need to delay before resending? */
if (!nfs4_stateid_is_newer(&lo->plh_stateid,
&data->args.stateid))
rpc_delay(task, HZ);
rpc_restart_call_prepare(task);
}
spin_unlock(&inode->i_lock);
break;
case -ENOTSUPP:
case -EOPNOTSUPP:
NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTSTATS;
}
dprintk("%s server returns %d\n", __func__, task->tk_status);
}
static void
nfs42_layoutstat_release(void *calldata)
{
struct nfs42_layoutstat_data *data = calldata;
struct nfs_server *nfss = NFS_SERVER(data->args.inode);
if (nfss->pnfs_curr_ld->cleanup_layoutstats)
nfss->pnfs_curr_ld->cleanup_layoutstats(data);
pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
smp_mb__before_atomic();
clear_bit(NFS_INO_LAYOUTSTATS, &NFS_I(data->args.inode)->flags);
smp_mb__after_atomic();
nfs_iput_and_deactive(data->inode);
kfree(data->args.devinfo);
kfree(data);
}
static const struct rpc_call_ops nfs42_layoutstat_ops = {
.rpc_call_prepare = nfs42_layoutstat_prepare,
.rpc_call_done = nfs42_layoutstat_done,
.rpc_release = nfs42_layoutstat_release,
};
int nfs42_proc_layoutstats_generic(struct nfs_server *server,
struct nfs42_layoutstat_data *data)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTSTATS],
.rpc_argp = &data->args,
.rpc_resp = &data->res,
};
struct rpc_task_setup task_setup = {
.rpc_client = server->client,
.rpc_message = &msg,
.callback_ops = &nfs42_layoutstat_ops,
.callback_data = data,
.flags = RPC_TASK_ASYNC,
};
struct rpc_task *task;
data->inode = nfs_igrab_and_active(data->args.inode);
if (!data->inode) {
nfs42_layoutstat_release(data);
return -EAGAIN;
}
nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
task = rpc_run_task(&task_setup);
if (IS_ERR(task))
return PTR_ERR(task);
rpc_put_task(task);
return 0;
}
static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
struct file *dst_f, struct nfs_lock_context *src_lock,
struct nfs_lock_context *dst_lock, loff_t src_offset,
loff_t dst_offset, loff_t count)
{
struct inode *src_inode = file_inode(src_f);
struct inode *dst_inode = file_inode(dst_f);
struct nfs_server *server = NFS_SERVER(dst_inode);
struct nfs42_clone_args args = {
.src_fh = NFS_FH(src_inode),
.dst_fh = NFS_FH(dst_inode),
.src_offset = src_offset,
.dst_offset = dst_offset,
.count = count,
.dst_bitmask = server->cache_consistency_bitmask,
};
struct nfs42_clone_res res = {
.server = server,
};
int status;
msg->rpc_argp = &args;
msg->rpc_resp = &res;
status = nfs4_set_rw_stateid(&args.src_stateid, src_lock->open_context,
src_lock, FMODE_READ);
if (status)
return status;
status = nfs4_set_rw_stateid(&args.dst_stateid, dst_lock->open_context,
dst_lock, FMODE_WRITE);
if (status)
return status;
res.dst_fattr = nfs_alloc_fattr();
if (!res.dst_fattr)
return -ENOMEM;
status = nfs4_call_sync(server->client, server, msg,
&args.seq_args, &res.seq_res, 0);
if (status == 0)
status = nfs_post_op_update_inode(dst_inode, res.dst_fattr);
kfree(res.dst_fattr);
return status;
}
int nfs42_proc_clone(struct file *src_f, struct file *dst_f,
loff_t src_offset, loff_t dst_offset, loff_t count)
{
struct rpc_message msg = {
.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLONE],
};
struct inode *inode = file_inode(src_f);
struct nfs_server *server = NFS_SERVER(file_inode(src_f));
struct nfs_lock_context *src_lock;
struct nfs_lock_context *dst_lock;
struct nfs4_exception src_exception = { };
struct nfs4_exception dst_exception = { };
int err, err2;
if (!nfs_server_capable(inode, NFS_CAP_CLONE))
return -EOPNOTSUPP;
src_lock = nfs_get_lock_context(nfs_file_open_context(src_f));
if (IS_ERR(src_lock))
return PTR_ERR(src_lock);
src_exception.inode = file_inode(src_f);
src_exception.state = src_lock->open_context->state;
dst_lock = nfs_get_lock_context(nfs_file_open_context(dst_f));
if (IS_ERR(dst_lock)) {
err = PTR_ERR(dst_lock);
goto out_put_src_lock;
}
dst_exception.inode = file_inode(dst_f);
dst_exception.state = dst_lock->open_context->state;
do {
err = _nfs42_proc_clone(&msg, src_f, dst_f, src_lock, dst_lock,
src_offset, dst_offset, count);
if (err == -ENOTSUPP || err == -EOPNOTSUPP) {
NFS_SERVER(inode)->caps &= ~NFS_CAP_CLONE;
err = -EOPNOTSUPP;
break;
}
err2 = nfs4_handle_exception(server, err, &src_exception);
err = nfs4_handle_exception(server, err, &dst_exception);
if (!err)
err = err2;
} while (src_exception.retry || dst_exception.retry);
nfs_put_lock_context(dst_lock);
out_put_src_lock:
nfs_put_lock_context(src_lock);
return err;
}
int
main (int argc, char *argv[])
{
if (rpc_test_get_connection_path)
g_connection_path = rpc_test_get_connection_path ();
else
g_connection_path = NPW_CONNECTION_PATH "/Test.RPC";
#ifdef BUILD_CLIENT
gchar **child_args;
if (argc < 2)
g_error ("no server program provided on command line");
signal (SIGSEGV, urgent_exit_sig);
signal (SIGBUS, urgent_exit_sig);
signal (SIGINT, urgent_exit_sig);
signal (SIGABRT, urgent_exit_sig);
if ((child_args = clone_args (argv)) == NULL)
g_error ("could not create server program arguments\n");
g_free (child_args[0]);
child_args[0] = g_strdup (argv[1]);
if (!g_spawn_async (NULL,
child_args,
NULL,
G_SPAWN_DO_NOT_REAP_CHILD,
NULL,
NULL,
&g_child_pid,
NULL))
g_error ("could not start server program '%s'", child_args[0]);
g_strfreev (child_args);
if ((g_connection = rpc_init_client (g_connection_path)) == NULL)
g_error ("failed to initialize RPC client connection");
#endif
#ifdef BUILD_SERVER
if ((g_connection = rpc_init_server (g_connection_path)) == NULL)
g_error ("failed to initialize RPC server connection");
#endif
int fd = -1;
GSource *rpc_source = NULL;
guint rpc_source_id = 0;
GPollFD rpc_event_poll_fd;
#ifdef BUILD_CLIENT
fd = rpc_socket (g_connection);
#endif
#ifdef BUILD_SERVER
fd = rpc_listen_socket (g_connection);
#endif
RPC_TEST_ENSURE (fd >= 0);
if ((rpc_source = g_source_new (&rpc_event_funcs, sizeof (GSource))) == NULL)
g_error ("failed to initialize RPC source");
rpc_source_id = g_source_attach (rpc_source, NULL);
memset (&rpc_event_poll_fd, 0, sizeof (rpc_event_poll_fd));
rpc_event_poll_fd.fd = fd;
rpc_event_poll_fd.events = G_IO_IN;
rpc_event_poll_fd.revents = 0;
g_source_add_poll (rpc_source, &rpc_event_poll_fd);
static const rpc_method_descriptor_t vtable[] = {
{ RPC_TEST_METHOD_EXIT, handle_rpc_test_exit }
};
if (rpc_connection_add_method_descriptor (g_connection, &vtable[0]) < 0)
g_error ("could not add method descriptor for TEST_RPC_METHOD_EXIT");
g_main_loop = g_main_loop_new (NULL, TRUE);
#ifdef BUILD_CLIENT
g_child_watch_id = g_child_watch_add (g_child_pid, child_exited_cb, NULL);
#endif
rpc_test_init_invoke (argv);
g_main_loop_run (g_main_loop);
if (rpc_source_id)
g_source_remove (rpc_source_id);
if (g_connection)
rpc_exit (g_connection);
return g_exit_status;
}
