From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/fs/lockd/svc4proc.c | 505 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 505 insertions(+) create mode 100644 kernel/fs/lockd/svc4proc.c (limited to 'kernel/fs/lockd/svc4proc.c') diff --git a/kernel/fs/lockd/svc4proc.c b/kernel/fs/lockd/svc4proc.c new file mode 100644 index 000000000..b147d1ae7 --- /dev/null +++ b/kernel/fs/lockd/svc4proc.c @@ -0,0 +1,505 @@ +/* + * linux/fs/lockd/svc4proc.c + * + * Lockd server procedures. We don't implement the NLM_*_RES + * procedures because we don't use the async procedures. + * + * Copyright (C) 1996, Olaf Kirch + */ + +#include +#include +#include +#include +#include + +#define NLMDBG_FACILITY NLMDBG_CLIENT + +/* + * Obtain client and file from arguments + */ +static __be32 +nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_host **hostp, struct nlm_file **filp) +{ + struct nlm_host *host = NULL; + struct nlm_file *file = NULL; + struct nlm_lock *lock = &argp->lock; + __be32 error = 0; + + /* nfsd callbacks must have been installed for this procedure */ + if (!nlmsvc_ops) + return nlm_lck_denied_nolocks; + + /* Obtain host handle */ + if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len)) + || (argp->monitor && nsm_monitor(host) < 0)) + goto no_locks; + *hostp = host; + + /* Obtain file pointer. Not used by FREE_ALL call. */ + if (filp != NULL) { + if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0) + goto no_locks; + *filp = file; + + /* Set up the missing parts of the file_lock structure */ + lock->fl.fl_file = file->f_file; + lock->fl.fl_owner = (fl_owner_t) host; + lock->fl.fl_lmops = &nlmsvc_lock_operations; + } + + return 0; + +no_locks: + nlmsvc_release_host(host); + if (error) + return error; + return nlm_lck_denied_nolocks; +} + +/* + * NULL: Test for presence of service + */ +static __be32 +nlm4svc_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) +{ + dprintk("lockd: NULL called\n"); + return rpc_success; +} + +/* + * TEST: Check for conflicting lock + */ +static __be32 +nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_res *resp) +{ + struct nlm_host *host; + struct nlm_file *file; + __be32 rc = rpc_success; + + dprintk("lockd: TEST4 called\n"); + resp->cookie = argp->cookie; + + /* Obtain client and file */ + if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file))) + return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success; + + /* Now check for conflicting locks */ + resp->status = nlmsvc_testlock(rqstp, file, host, &argp->lock, &resp->lock, &resp->cookie); + if (resp->status == nlm_drop_reply) + rc = rpc_drop_reply; + else + dprintk("lockd: TEST4 status %d\n", ntohl(resp->status)); + + nlmsvc_release_host(host); + nlm_release_file(file); + return rc; +} + +static __be32 +nlm4svc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_res *resp) +{ + struct nlm_host *host; + struct nlm_file *file; + __be32 rc = rpc_success; + + dprintk("lockd: LOCK called\n"); + + resp->cookie = argp->cookie; + + /* Obtain client and file */ + if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file))) + return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success; + +#if 0 + /* If supplied state doesn't match current state, we assume it's + * an old request that time-warped somehow. Any error return would + * do in this case because it's irrelevant anyway. + * + * NB: We don't retrieve the remote host's state yet. + */ + if (host->h_nsmstate && host->h_nsmstate != argp->state) { + resp->status = nlm_lck_denied_nolocks; + } else +#endif + + /* Now try to lock the file */ + resp->status = nlmsvc_lock(rqstp, file, host, &argp->lock, + argp->block, &argp->cookie, + argp->reclaim); + if (resp->status == nlm_drop_reply) + rc = rpc_drop_reply; + else + dprintk("lockd: LOCK status %d\n", ntohl(resp->status)); + + nlmsvc_release_host(host); + nlm_release_file(file); + return rc; +} + +static __be32 +nlm4svc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_res *resp) +{ + struct nlm_host *host; + struct nlm_file *file; + + dprintk("lockd: CANCEL 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 = nlm4svc_retrieve_args(rqstp, argp, &host, &file))) + return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success; + + /* Try to cancel request. */ + resp->status = nlmsvc_cancel_blocked(SVC_NET(rqstp), file, &argp->lock); + + dprintk("lockd: CANCEL status %d\n", ntohl(resp->status)); + nlmsvc_release_host(host); + nlm_release_file(file); + return rpc_success; +} + +/* + * UNLOCK: release a lock + */ +static __be32 +nlm4svc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_res *resp) +{ + struct nlm_host *host; + struct nlm_file *file; + + dprintk("lockd: UNLOCK called\n"); + + resp->cookie = argp->cookie; + + /* Don't accept new lock 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 = nlm4svc_retrieve_args(rqstp, argp, &host, &file))) + return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success; + + /* Now try to remove the lock */ + resp->status = nlmsvc_unlock(SVC_NET(rqstp), file, &argp->lock); + + dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status)); + nlmsvc_release_host(host); + nlm_release_file(file); + return rpc_success; +} + +/* + * GRANTED: A server calls us to tell that a process' lock request + * was granted + */ +static __be32 +nlm4svc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_res *resp) +{ + resp->cookie = argp->cookie; + + dprintk("lockd: GRANTED called\n"); + resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock); + dprintk("lockd: GRANTED status %d\n", ntohl(resp->status)); + return rpc_success; +} + +/* + * This is the generic lockd callback for async RPC calls + */ +static void nlm4svc_callback_exit(struct rpc_task *task, void *data) +{ + dprintk("lockd: %5u callback returned %d\n", task->tk_pid, + -task->tk_status); +} + +static void nlm4svc_callback_release(void *data) +{ + nlmsvc_release_call(data); +} + +static const struct rpc_call_ops nlm4svc_callback_ops = { + .rpc_call_done = nlm4svc_callback_exit, + .rpc_release = nlm4svc_callback_release, +}; + +/* + * `Async' versions of the above service routines. They aren't really, + * because we send the callback before the reply proper. I hope this + * doesn't break any clients. + */ +static __be32 nlm4svc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_args *argp, + __be32 (*func)(struct svc_rqst *, struct nlm_args *, struct nlm_res *)) +{ + struct nlm_host *host; + struct nlm_rqst *call; + __be32 stat; + + host = nlmsvc_lookup_host(rqstp, + argp->lock.caller, + argp->lock.len); + if (host == NULL) + return rpc_system_err; + + call = nlm_alloc_call(host); + nlmsvc_release_host(host); + if (call == NULL) + return rpc_system_err; + + stat = func(rqstp, argp, &call->a_res); + if (stat != 0) { + nlmsvc_release_call(call); + return stat; + } + + call->a_flags = RPC_TASK_ASYNC; + if (nlm_async_reply(call, proc, &nlm4svc_callback_ops) < 0) + return rpc_system_err; + return rpc_success; +} + +static __be32 nlm4svc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp, + void *resp) +{ + dprintk("lockd: TEST_MSG called\n"); + return nlm4svc_callback(rqstp, NLMPROC_TEST_RES, argp, nlm4svc_proc_test); +} + +static __be32 nlm4svc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, + void *resp) +{ + dprintk("lockd: LOCK_MSG called\n"); + return nlm4svc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlm4svc_proc_lock); +} + +static __be32 nlm4svc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp, + void *resp) +{ + dprintk("lockd: CANCEL_MSG called\n"); + return nlm4svc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlm4svc_proc_cancel); +} + +static __be32 nlm4svc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp, + void *resp) +{ + dprintk("lockd: UNLOCK_MSG called\n"); + return nlm4svc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlm4svc_proc_unlock); +} + +static __be32 nlm4svc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp, + void *resp) +{ + dprintk("lockd: GRANTED_MSG called\n"); + return nlm4svc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlm4svc_proc_granted); +} + +/* + * SHARE: create a DOS share or alter existing share. + */ +static __be32 +nlm4svc_proc_share(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_res *resp) +{ + struct nlm_host *host; + struct nlm_file *file; + + dprintk("lockd: SHARE called\n"); + + resp->cookie = argp->cookie; + + /* Don't accept new lock requests during grace period */ + if (locks_in_grace(SVC_NET(rqstp)) && !argp->reclaim) { + resp->status = nlm_lck_denied_grace_period; + return rpc_success; + } + + /* Obtain client and file */ + if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file))) + return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success; + + /* Now try to create the share */ + resp->status = nlmsvc_share_file(host, file, argp); + + dprintk("lockd: SHARE status %d\n", ntohl(resp->status)); + nlmsvc_release_host(host); + nlm_release_file(file); + return rpc_success; +} + +/* + * UNSHARE: Release a DOS share. + */ +static __be32 +nlm4svc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_res *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 = nlm4svc_retrieve_args(rqstp, argp, &host, &file))) + return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success; + + /* Now try to lock the file */ + resp->status = nlmsvc_unshare_file(host, file, argp); + + dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status)); + nlmsvc_release_host(host); + nlm_release_file(file); + return rpc_success; +} + +/* + * NM_LOCK: Create an unmonitored lock + */ +static __be32 +nlm4svc_proc_nm_lock(struct svc_rqst *rqstp, struct nlm_args *argp, + struct nlm_res *resp) +{ + dprintk("lockd: NM_LOCK called\n"); + + argp->monitor = 0; /* just clean the monitor flag */ + return nlm4svc_proc_lock(rqstp, argp, resp); +} + +/* + * FREE_ALL: Release all locks and shares held by client + */ +static __be32 +nlm4svc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp, + void *resp) +{ + struct nlm_host *host; + + /* Obtain client */ + if (nlm4svc_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 +nlm4svc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp, + void *resp) +{ + 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(argp); + return rpc_success; +} + +/* + * client sent a GRANTED_RES, let's remove the associated block + */ +static __be32 +nlm4svc_proc_granted_res(struct svc_rqst *rqstp, struct nlm_res *argp, + void *resp) +{ + if (!nlmsvc_ops) + return rpc_success; + + dprintk("lockd: GRANTED_RES called\n"); + + nlmsvc_grant_reply(&argp->cookie, argp->status); + return rpc_success; +} + + +/* + * NLM Server procedures. + */ + +#define nlm4svc_encode_norep nlm4svc_encode_void +#define nlm4svc_decode_norep nlm4svc_decode_void +#define nlm4svc_decode_testres nlm4svc_decode_void +#define nlm4svc_decode_lockres nlm4svc_decode_void +#define nlm4svc_decode_unlockres nlm4svc_decode_void +#define nlm4svc_decode_cancelres nlm4svc_decode_void +#define nlm4svc_decode_grantedres nlm4svc_decode_void + +#define nlm4svc_proc_none nlm4svc_proc_null +#define nlm4svc_proc_test_res nlm4svc_proc_null +#define nlm4svc_proc_lock_res nlm4svc_proc_null +#define nlm4svc_proc_cancel_res nlm4svc_proc_null +#define nlm4svc_proc_unlock_res nlm4svc_proc_null + +struct nlm_void { int dummy; }; + +#define PROC(name, xargt, xrest, argt, rest, respsize) \ + { .pc_func = (svc_procfunc) nlm4svc_proc_##name, \ + .pc_decode = (kxdrproc_t) nlm4svc_decode_##xargt, \ + .pc_encode = (kxdrproc_t) nlm4svc_encode_##xrest, \ + .pc_release = NULL, \ + .pc_argsize = sizeof(struct nlm_##argt), \ + .pc_ressize = sizeof(struct nlm_##rest), \ + .pc_xdrressize = respsize, \ + } +#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */ +#define No (1+1024/4) /* netobj */ +#define St 1 /* status */ +#define Rg 4 /* range (offset + length) */ +struct svc_procedure nlmsvc_procedures4[] = { + PROC(null, void, void, void, void, 1), + PROC(test, testargs, testres, args, res, Ck+St+2+No+Rg), + PROC(lock, lockargs, res, args, res, Ck+St), + PROC(cancel, cancargs, res, args, res, Ck+St), + PROC(unlock, unlockargs, res, args, res, Ck+St), + PROC(granted, testargs, res, args, res, Ck+St), + PROC(test_msg, testargs, norep, args, void, 1), + PROC(lock_msg, lockargs, norep, args, void, 1), + PROC(cancel_msg, cancargs, norep, args, void, 1), + PROC(unlock_msg, unlockargs, norep, args, void, 1), + PROC(granted_msg, testargs, norep, args, void, 1), + PROC(test_res, testres, norep, res, void, 1), + PROC(lock_res, lockres, norep, res, void, 1), + PROC(cancel_res, cancelres, norep, res, void, 1), + PROC(unlock_res, unlockres, norep, res, void, 1), + PROC(granted_res, res, norep, res, void, 1), + /* statd callback */ + PROC(sm_notify, reboot, void, reboot, void, 1), + PROC(none, void, void, void, void, 0), + PROC(none, void, void, void, void, 0), + PROC(none, void, void, void, void, 0), + PROC(share, shareargs, shareres, args, res, Ck+St+1), + PROC(unshare, shareargs, shareres, args, res, Ck+St+1), + PROC(nm_lock, lockargs, res, args, res, Ck+St), + PROC(free_all, notify, void, args, void, 1), + +}; -- cgit 1.2.3-korg