mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2026-07-23 22:38:20 -04:00
0b47424032
The F_GETLK fcntl can work with either read access or write access or
both. It can query F_RDLCK and F_WRLCK locks in either case.
However lockd currently treats F_GETLK similar to F_SETLK in that read
access is required to query an F_RDLCK lock and write access is required
to query a F_WRLCK lock.
This is wrong and can cause problems - e.g. when qemu accesses a
read-only (e.g. iso) filesystem image over NFS (though why it queries
if it can get a write lock - I don't know. But it does, and this works
with local filesystems).
So we need TEST requests to be handled differently. To do this:
- change nlm_do_fopen() to accept O_RDWR as a mode and in that case
succeed if either a O_RDONLY or O_WRONLY file can be opened.
- change nlm_lookup_file() to accept a mode argument from caller,
instead of deducing base on lock time, and pass that on to nlm_do_fopen()
- change nlm4svc_retrieve_args() and nlmsvc_retrieve_args() to detect
TEST requests and pass O_RDWR as a mode to nlm_lookup_file, passing
the same mode as before for other requests. Also set
lock->fl.c.flc_file to whichever file is available for TEST requests.
- change nlmsvc_testlock() to also not calculate the mode, but to use
whatever was stored in lock->fl.c.flc_file.
This behaviour of lockd - requesting O_WRONLY access to TEST for
exclusive locks - has been present at least since git history began.
However it was hidden until recently because knfsd ignored the access
requested by lockd and required only READ access for all locking
requests (unless the underlying filesystem provided an f_op->open
function which checked access permissions).
The commit mentioned in Fixes: below changed nfsd_permission() to NOT
override the access request for LOCK requests and this exposed the bug
that we are now fixing.
Note that there is another issue that this patch does not address.
The flock(.., LOCK_EX) call is permitted on a read-only file descriptor.
Linux NFS maps this to NLM locking as whole-file byte-range locks.
nfsd will see this as though it were fcntl( F_SETLK (F_WRLCK)) and will
now require write access, which it might not be able to get.
It is not clear if this is a problem in practice, or what the best
solution might be. So no attempt is made to address it.
Reported-by: Tj <tj.iam.tj@proton.me>
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1128861
Fixes: 4cc9b9f2bf ("nfsd: refine and rename NFSD_MAY_LOCK")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: NeilBrown <neil@brown.name>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
848 lines
22 KiB
C
848 lines
22 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* linux/fs/lockd/svcproc.c
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*
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* Lockd server procedures. We don't implement the NLM_*_RES
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* procedures because we don't use the async procedures.
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*
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* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/types.h>
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#include <linux/time.h>
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#include <linux/sunrpc/svc_xprt.h>
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#include "lockd.h"
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#include "share.h"
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#define NLMDBG_FACILITY NLMDBG_CLIENT
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#ifdef CONFIG_LOCKD_V4
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static inline __be32 cast_status(__be32 status)
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{
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switch (status) {
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case nlm_granted:
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case nlm_lck_denied:
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case nlm_lck_denied_nolocks:
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case nlm_lck_blocked:
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case nlm_lck_denied_grace_period:
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case nlm__int__drop_reply:
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break;
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case nlm__int__deadlock:
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status = nlm_lck_denied;
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break;
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default:
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status = nlm_lck_denied_nolocks;
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}
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return status;
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}
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#else
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static inline __be32 cast_status(__be32 status)
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{
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switch (status) {
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case nlm__int__deadlock:
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status = nlm_lck_denied;
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break;
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case nlm__int__stale_fh:
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case nlm__int__failed:
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status = nlm_lck_denied_nolocks;
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break;
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default:
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if (be32_to_cpu(status) >= 30000)
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pr_warn_once("lockd: unhandled internal status %u\n",
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be32_to_cpu(status));
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break;
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}
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return status;
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}
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#endif
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/*
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* Obtain client and file from arguments
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*/
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static __be32
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nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
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struct nlm_host **hostp, struct nlm_file **filp)
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{
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struct nlm_host *host = NULL;
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struct nlm_file *file = NULL;
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struct nlm_lock *lock = &argp->lock;
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bool is_test = (rqstp->rq_proc == NLMPROC_TEST ||
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rqstp->rq_proc == NLMPROC_TEST_MSG);
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int mode;
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__be32 error = 0;
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/* nfsd callbacks must have been installed for this procedure */
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if (!nlmsvc_ops)
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return nlm_lck_denied_nolocks;
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/* Obtain host handle */
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if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))
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|| (argp->monitor && nsm_monitor(host) < 0))
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goto no_locks;
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*hostp = host;
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/* Obtain file pointer. Not used by FREE_ALL call. */
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if (filp != NULL) {
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mode = lock_to_openmode(&lock->fl);
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if (is_test)
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mode = O_RDWR;
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error = cast_status(nlm_lookup_file(rqstp, &file, lock, mode));
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if (error != 0)
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goto no_locks;
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*filp = file;
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/* Set up the missing parts of the file_lock structure */
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lock->fl.c.flc_flags = FL_POSIX;
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if (is_test)
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lock->fl.c.flc_file = nlmsvc_file_file(file);
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else
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lock->fl.c.flc_file = file->f_file[mode];
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lock->fl.c.flc_pid = current->tgid;
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lock->fl.fl_lmops = &nlmsvc_lock_operations;
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nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
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if (!lock->fl.c.flc_owner) {
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/* lockowner allocation has failed */
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nlmsvc_release_host(host);
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return nlm_lck_denied_nolocks;
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}
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}
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return 0;
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no_locks:
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nlmsvc_release_host(host);
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if (error)
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return error;
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return nlm_lck_denied_nolocks;
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}
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/*
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* NULL: Test for presence of service
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*/
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static __be32
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nlmsvc_proc_null(struct svc_rqst *rqstp)
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{
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dprintk("lockd: NULL called\n");
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return rpc_success;
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}
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/*
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* TEST: Check for conflicting lock
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*/
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static __be32
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__nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_file *file;
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__be32 rc = rpc_success;
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dprintk("lockd: TEST called\n");
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resp->cookie = argp->cookie;
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/* Obtain client and file */
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if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm__int__drop_reply ?
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rpc_drop_reply : rpc_success;
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/* Now check for conflicting locks */
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resp->status = cast_status(nlmsvc_testlock(rqstp, file, host,
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&argp->lock, &resp->lock));
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if (resp->status == nlm__int__drop_reply)
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rc = rpc_drop_reply;
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else
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dprintk("lockd: TEST status %d vers %d\n",
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ntohl(resp->status), rqstp->rq_vers);
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nlmsvc_release_lockowner(&argp->lock);
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rc;
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}
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static __be32
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nlmsvc_proc_test(struct svc_rqst *rqstp)
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{
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return __nlmsvc_proc_test(rqstp, rqstp->rq_resp);
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}
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static __be32
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__nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_file *file;
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__be32 rc = rpc_success;
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dprintk("lockd: LOCK called\n");
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resp->cookie = argp->cookie;
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/* Obtain client and file */
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if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm__int__drop_reply ?
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rpc_drop_reply : rpc_success;
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/* Now try to lock the file */
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resp->status = cast_status(nlmsvc_lock(rqstp, file, host, &argp->lock,
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argp->block, &argp->cookie,
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argp->reclaim));
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if (resp->status == nlm__int__drop_reply)
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rc = rpc_drop_reply;
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else
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dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
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nlmsvc_release_lockowner(&argp->lock);
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rc;
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}
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static __be32
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nlmsvc_proc_lock(struct svc_rqst *rqstp)
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{
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return __nlmsvc_proc_lock(rqstp, rqstp->rq_resp);
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}
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static __be32
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__nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_file *file;
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struct net *net = SVC_NET(rqstp);
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dprintk("lockd: CANCEL called\n");
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resp->cookie = argp->cookie;
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/* Don't accept requests during grace period */
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if (locks_in_grace(net)) {
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resp->status = nlm_lck_denied_grace_period;
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return rpc_success;
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}
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/* Obtain client and file */
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if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm__int__drop_reply ?
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rpc_drop_reply : rpc_success;
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/* Try to cancel request. */
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resp->status = cast_status(nlmsvc_cancel_blocked(net, file, &argp->lock));
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dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
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nlmsvc_release_lockowner(&argp->lock);
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rpc_success;
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}
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static __be32
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nlmsvc_proc_cancel(struct svc_rqst *rqstp)
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{
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return __nlmsvc_proc_cancel(rqstp, rqstp->rq_resp);
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}
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/*
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* UNLOCK: release a lock
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*/
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static __be32
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__nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_file *file;
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struct net *net = SVC_NET(rqstp);
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dprintk("lockd: UNLOCK called\n");
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resp->cookie = argp->cookie;
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/* Don't accept new lock requests during grace period */
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if (locks_in_grace(net)) {
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resp->status = nlm_lck_denied_grace_period;
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return rpc_success;
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}
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/* Obtain client and file */
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if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm__int__drop_reply ?
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rpc_drop_reply : rpc_success;
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/* Now try to remove the lock */
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resp->status = cast_status(nlmsvc_unlock(net, file, &argp->lock));
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dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
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nlmsvc_release_lockowner(&argp->lock);
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rpc_success;
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}
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static __be32
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nlmsvc_proc_unlock(struct svc_rqst *rqstp)
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{
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return __nlmsvc_proc_unlock(rqstp, rqstp->rq_resp);
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}
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/*
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* GRANTED: A server calls us to tell that a process' lock request
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* was granted
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*/
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static __be32
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__nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_res *resp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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resp->cookie = argp->cookie;
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dprintk("lockd: GRANTED called\n");
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resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
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dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
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return rpc_success;
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}
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static __be32
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nlmsvc_proc_granted(struct svc_rqst *rqstp)
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{
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return __nlmsvc_proc_granted(rqstp, rqstp->rq_resp);
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}
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/*
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* This is the generic lockd callback for async RPC calls
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*/
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static void nlmsvc_callback_exit(struct rpc_task *task, void *data)
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{
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}
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void nlmsvc_release_call(struct nlm_rqst *call)
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{
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if (!refcount_dec_and_test(&call->a_count))
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return;
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nlmsvc_release_host(call->a_host);
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kfree(call);
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}
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static void nlmsvc_callback_release(void *data)
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{
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nlmsvc_release_call(data);
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}
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static const struct rpc_call_ops nlmsvc_callback_ops = {
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.rpc_call_done = nlmsvc_callback_exit,
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.rpc_release = nlmsvc_callback_release,
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};
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/*
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* `Async' versions of the above service routines. They aren't really,
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* because we send the callback before the reply proper. I hope this
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* doesn't break any clients.
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*/
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static __be32 nlmsvc_callback(struct svc_rqst *rqstp, u32 proc,
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__be32 (*func)(struct svc_rqst *, struct nlm_res *))
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_host *host;
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struct nlm_rqst *call;
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__be32 stat;
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host = nlmsvc_lookup_host(rqstp,
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argp->lock.caller,
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argp->lock.len);
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if (host == NULL)
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return rpc_system_err;
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call = nlm_alloc_call(host);
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nlmsvc_release_host(host);
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if (call == NULL)
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return rpc_system_err;
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stat = func(rqstp, &call->a_res);
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if (stat != 0) {
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nlmsvc_release_call(call);
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return stat;
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}
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call->a_flags = RPC_TASK_ASYNC;
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if (nlm_async_reply(call, proc, &nlmsvc_callback_ops) < 0)
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return rpc_system_err;
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return rpc_success;
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}
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static __be32 nlmsvc_proc_test_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: TEST_MSG called\n");
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return nlmsvc_callback(rqstp, NLMPROC_TEST_RES, __nlmsvc_proc_test);
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}
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static __be32 nlmsvc_proc_lock_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: LOCK_MSG called\n");
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return nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, __nlmsvc_proc_lock);
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}
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static __be32 nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: CANCEL_MSG called\n");
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return nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, __nlmsvc_proc_cancel);
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}
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static __be32
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nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: UNLOCK_MSG called\n");
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return nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, __nlmsvc_proc_unlock);
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}
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static __be32
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nlmsvc_proc_granted_msg(struct svc_rqst *rqstp)
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{
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dprintk("lockd: GRANTED_MSG called\n");
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return nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, __nlmsvc_proc_granted);
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}
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/*
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* SHARE: create a DOS share or alter existing share.
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*/
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static __be32
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nlmsvc_proc_share(struct svc_rqst *rqstp)
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{
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struct nlm_args *argp = rqstp->rq_argp;
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struct nlm_res *resp = rqstp->rq_resp;
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struct nlm_host *host;
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struct nlm_file *file;
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dprintk("lockd: SHARE called\n");
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resp->cookie = argp->cookie;
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/* Don't accept new lock requests during grace period */
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if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) {
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resp->status = nlm_lck_denied_grace_period;
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return rpc_success;
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}
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|
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/* Obtain client and file */
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if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
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return resp->status == nlm__int__drop_reply ?
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rpc_drop_reply : rpc_success;
|
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|
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/* Now try to create the share */
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resp->status = cast_status(nlmsvc_share_file(host, file, &argp->lock.oh,
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argp->fsm_access,
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argp->fsm_mode));
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|
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dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
|
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nlmsvc_release_lockowner(&argp->lock);
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nlmsvc_release_host(host);
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nlm_release_file(file);
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return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* UNSHARE: Release a DOS share.
|
|
*/
|
|
static __be32
|
|
nlmsvc_proc_unshare(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_args *argp = rqstp->rq_argp;
|
|
struct nlm_res *resp = rqstp->rq_resp;
|
|
struct nlm_host *host;
|
|
struct nlm_file *file;
|
|
|
|
dprintk("lockd: UNSHARE called\n");
|
|
|
|
resp->cookie = argp->cookie;
|
|
|
|
/* Don't accept requests during grace period */
|
|
if (locks_in_grace(SVC_NET(rqstp))) {
|
|
resp->status = nlm_lck_denied_grace_period;
|
|
return rpc_success;
|
|
}
|
|
|
|
/* Obtain client and file */
|
|
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
|
|
return resp->status == nlm__int__drop_reply ?
|
|
rpc_drop_reply : rpc_success;
|
|
|
|
/* Now try to unshare the file */
|
|
resp->status = cast_status(nlmsvc_unshare_file(host, file,
|
|
&argp->lock.oh));
|
|
|
|
dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
|
|
nlmsvc_release_lockowner(&argp->lock);
|
|
nlmsvc_release_host(host);
|
|
nlm_release_file(file);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* NM_LOCK: Create an unmonitored lock
|
|
*/
|
|
static __be32
|
|
nlmsvc_proc_nm_lock(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_args *argp = rqstp->rq_argp;
|
|
|
|
dprintk("lockd: NM_LOCK called\n");
|
|
|
|
argp->monitor = 0; /* just clean the monitor flag */
|
|
return nlmsvc_proc_lock(rqstp);
|
|
}
|
|
|
|
/*
|
|
* FREE_ALL: Release all locks and shares held by client
|
|
*/
|
|
static __be32
|
|
nlmsvc_proc_free_all(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_args *argp = rqstp->rq_argp;
|
|
struct nlm_host *host;
|
|
|
|
/* Obtain client */
|
|
if (nlmsvc_retrieve_args(rqstp, argp, &host, NULL))
|
|
return rpc_success;
|
|
|
|
nlmsvc_free_host_resources(host);
|
|
nlmsvc_release_host(host);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* SM_NOTIFY: private callback from statd (not part of official NLM proto)
|
|
*/
|
|
static __be32
|
|
nlmsvc_proc_sm_notify(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_reboot *argp = rqstp->rq_argp;
|
|
|
|
dprintk("lockd: SM_NOTIFY called\n");
|
|
|
|
if (!nlm_privileged_requester(rqstp)) {
|
|
char buf[RPC_MAX_ADDRBUFLEN];
|
|
printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",
|
|
svc_print_addr(rqstp, buf, sizeof(buf)));
|
|
return rpc_system_err;
|
|
}
|
|
|
|
nlm_host_rebooted(SVC_NET(rqstp), argp);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* client sent a GRANTED_RES, let's remove the associated block
|
|
*/
|
|
static __be32
|
|
nlmsvc_proc_granted_res(struct svc_rqst *rqstp)
|
|
{
|
|
struct nlm_res *argp = rqstp->rq_argp;
|
|
|
|
if (!nlmsvc_ops)
|
|
return rpc_success;
|
|
|
|
dprintk("lockd: GRANTED_RES called\n");
|
|
|
|
nlmsvc_grant_reply(&argp->cookie, argp->status);
|
|
return rpc_success;
|
|
}
|
|
|
|
static __be32
|
|
nlmsvc_proc_unused(struct svc_rqst *rqstp)
|
|
{
|
|
return rpc_proc_unavail;
|
|
}
|
|
|
|
/*
|
|
* NLM Server procedures.
|
|
*/
|
|
|
|
struct nlm_void { int dummy; };
|
|
|
|
#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */
|
|
#define St 1 /* status */
|
|
#define No (1+1024/4) /* Net Obj */
|
|
#define Rg 2 /* range - offset + size */
|
|
|
|
static const struct svc_procedure nlmsvc_procedures[24] = {
|
|
[NLMPROC_NULL] = {
|
|
.pc_func = nlmsvc_proc_null,
|
|
.pc_decode = nlmsvc_decode_void,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_void),
|
|
.pc_argzero = sizeof(struct nlm_void),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "NULL",
|
|
},
|
|
[NLMPROC_TEST] = {
|
|
.pc_func = nlmsvc_proc_test,
|
|
.pc_decode = nlmsvc_decode_testargs,
|
|
.pc_encode = nlmsvc_encode_testres,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_res),
|
|
.pc_xdrressize = Ck+St+2+No+Rg,
|
|
.pc_name = "TEST",
|
|
},
|
|
[NLMPROC_LOCK] = {
|
|
.pc_func = nlmsvc_proc_lock,
|
|
.pc_decode = nlmsvc_decode_lockargs,
|
|
.pc_encode = nlmsvc_encode_res,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_res),
|
|
.pc_xdrressize = Ck+St,
|
|
.pc_name = "LOCK",
|
|
},
|
|
[NLMPROC_CANCEL] = {
|
|
.pc_func = nlmsvc_proc_cancel,
|
|
.pc_decode = nlmsvc_decode_cancargs,
|
|
.pc_encode = nlmsvc_encode_res,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_res),
|
|
.pc_xdrressize = Ck+St,
|
|
.pc_name = "CANCEL",
|
|
},
|
|
[NLMPROC_UNLOCK] = {
|
|
.pc_func = nlmsvc_proc_unlock,
|
|
.pc_decode = nlmsvc_decode_unlockargs,
|
|
.pc_encode = nlmsvc_encode_res,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_res),
|
|
.pc_xdrressize = Ck+St,
|
|
.pc_name = "UNLOCK",
|
|
},
|
|
[NLMPROC_GRANTED] = {
|
|
.pc_func = nlmsvc_proc_granted,
|
|
.pc_decode = nlmsvc_decode_testargs,
|
|
.pc_encode = nlmsvc_encode_res,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_res),
|
|
.pc_xdrressize = Ck+St,
|
|
.pc_name = "GRANTED",
|
|
},
|
|
[NLMPROC_TEST_MSG] = {
|
|
.pc_func = nlmsvc_proc_test_msg,
|
|
.pc_decode = nlmsvc_decode_testargs,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "TEST_MSG",
|
|
},
|
|
[NLMPROC_LOCK_MSG] = {
|
|
.pc_func = nlmsvc_proc_lock_msg,
|
|
.pc_decode = nlmsvc_decode_lockargs,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "LOCK_MSG",
|
|
},
|
|
[NLMPROC_CANCEL_MSG] = {
|
|
.pc_func = nlmsvc_proc_cancel_msg,
|
|
.pc_decode = nlmsvc_decode_cancargs,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "CANCEL_MSG",
|
|
},
|
|
[NLMPROC_UNLOCK_MSG] = {
|
|
.pc_func = nlmsvc_proc_unlock_msg,
|
|
.pc_decode = nlmsvc_decode_unlockargs,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "UNLOCK_MSG",
|
|
},
|
|
[NLMPROC_GRANTED_MSG] = {
|
|
.pc_func = nlmsvc_proc_granted_msg,
|
|
.pc_decode = nlmsvc_decode_testargs,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "GRANTED_MSG",
|
|
},
|
|
[NLMPROC_TEST_RES] = {
|
|
.pc_func = nlmsvc_proc_null,
|
|
.pc_decode = nlmsvc_decode_void,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_res),
|
|
.pc_argzero = sizeof(struct nlm_res),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "TEST_RES",
|
|
},
|
|
[NLMPROC_LOCK_RES] = {
|
|
.pc_func = nlmsvc_proc_null,
|
|
.pc_decode = nlmsvc_decode_void,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_res),
|
|
.pc_argzero = sizeof(struct nlm_res),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "LOCK_RES",
|
|
},
|
|
[NLMPROC_CANCEL_RES] = {
|
|
.pc_func = nlmsvc_proc_null,
|
|
.pc_decode = nlmsvc_decode_void,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_res),
|
|
.pc_argzero = sizeof(struct nlm_res),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "CANCEL_RES",
|
|
},
|
|
[NLMPROC_UNLOCK_RES] = {
|
|
.pc_func = nlmsvc_proc_null,
|
|
.pc_decode = nlmsvc_decode_void,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_res),
|
|
.pc_argzero = sizeof(struct nlm_res),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "UNLOCK_RES",
|
|
},
|
|
[NLMPROC_GRANTED_RES] = {
|
|
.pc_func = nlmsvc_proc_granted_res,
|
|
.pc_decode = nlmsvc_decode_res,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_res),
|
|
.pc_argzero = sizeof(struct nlm_res),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "GRANTED_RES",
|
|
},
|
|
[NLMPROC_NSM_NOTIFY] = {
|
|
.pc_func = nlmsvc_proc_sm_notify,
|
|
.pc_decode = nlmsvc_decode_reboot,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_reboot),
|
|
.pc_argzero = sizeof(struct nlm_reboot),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "SM_NOTIFY",
|
|
},
|
|
[17] = {
|
|
.pc_func = nlmsvc_proc_unused,
|
|
.pc_decode = nlmsvc_decode_void,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_void),
|
|
.pc_argzero = sizeof(struct nlm_void),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "UNUSED",
|
|
},
|
|
[18] = {
|
|
.pc_func = nlmsvc_proc_unused,
|
|
.pc_decode = nlmsvc_decode_void,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_void),
|
|
.pc_argzero = sizeof(struct nlm_void),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "UNUSED",
|
|
},
|
|
[19] = {
|
|
.pc_func = nlmsvc_proc_unused,
|
|
.pc_decode = nlmsvc_decode_void,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_void),
|
|
.pc_argzero = sizeof(struct nlm_void),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = St,
|
|
.pc_name = "UNUSED",
|
|
},
|
|
[NLMPROC_SHARE] = {
|
|
.pc_func = nlmsvc_proc_share,
|
|
.pc_decode = nlmsvc_decode_shareargs,
|
|
.pc_encode = nlmsvc_encode_shareres,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_res),
|
|
.pc_xdrressize = Ck+St+1,
|
|
.pc_name = "SHARE",
|
|
},
|
|
[NLMPROC_UNSHARE] = {
|
|
.pc_func = nlmsvc_proc_unshare,
|
|
.pc_decode = nlmsvc_decode_shareargs,
|
|
.pc_encode = nlmsvc_encode_shareres,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_res),
|
|
.pc_xdrressize = Ck+St+1,
|
|
.pc_name = "UNSHARE",
|
|
},
|
|
[NLMPROC_NM_LOCK] = {
|
|
.pc_func = nlmsvc_proc_nm_lock,
|
|
.pc_decode = nlmsvc_decode_lockargs,
|
|
.pc_encode = nlmsvc_encode_res,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_res),
|
|
.pc_xdrressize = Ck+St,
|
|
.pc_name = "NM_LOCK",
|
|
},
|
|
[NLMPROC_FREE_ALL] = {
|
|
.pc_func = nlmsvc_proc_free_all,
|
|
.pc_decode = nlmsvc_decode_notify,
|
|
.pc_encode = nlmsvc_encode_void,
|
|
.pc_argsize = sizeof(struct nlm_args),
|
|
.pc_argzero = sizeof(struct nlm_args),
|
|
.pc_ressize = sizeof(struct nlm_void),
|
|
.pc_xdrressize = 0,
|
|
.pc_name = "FREE_ALL",
|
|
},
|
|
};
|
|
|
|
/*
|
|
* Storage requirements for XDR arguments and results
|
|
*/
|
|
union nlmsvc_xdrstore {
|
|
struct nlm_args args;
|
|
struct nlm_res res;
|
|
struct nlm_reboot reboot;
|
|
};
|
|
|
|
/*
|
|
* NLMv1 defines only procedures 1 - 15. Linux lockd also implements
|
|
* procedures 0 (NULL) and 16 (SM_NOTIFY).
|
|
*/
|
|
static DEFINE_PER_CPU_ALIGNED(unsigned long, nlm1svc_call_counters[17]);
|
|
|
|
const struct svc_version nlmsvc_version1 = {
|
|
.vs_vers = 1,
|
|
.vs_nproc = 17,
|
|
.vs_proc = nlmsvc_procedures,
|
|
.vs_count = nlm1svc_call_counters,
|
|
.vs_dispatch = nlmsvc_dispatch,
|
|
.vs_xdrsize = sizeof(union nlmsvc_xdrstore),
|
|
};
|
|
|
|
static DEFINE_PER_CPU_ALIGNED(unsigned long,
|
|
nlm3svc_call_counters[ARRAY_SIZE(nlmsvc_procedures)]);
|
|
|
|
const struct svc_version nlmsvc_version3 = {
|
|
.vs_vers = 3,
|
|
.vs_nproc = ARRAY_SIZE(nlmsvc_procedures),
|
|
.vs_proc = nlmsvc_procedures,
|
|
.vs_count = nlm3svc_call_counters,
|
|
.vs_dispatch = nlmsvc_dispatch,
|
|
.vs_xdrsize = sizeof(union nlmsvc_xdrstore),
|
|
};
|