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[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [lockd/] [svc4proc.c] - Blame information for rev 62

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/*
 * 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 <okir@monad.swb.de>
 */
 
#include <linux/types.h>
#include <linux/time.h>
#include <linux/slab.h>
#include <linux/in.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfsd/nfsd.h>
#include <linux/lockd/lockd.h>
#include <linux/lockd/share.h>
#include <linux/lockd/sm_inter.h>
 
 
#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:
        if (host)
                nlm_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;
 
        dprintk("lockd: TEST4        called\n");
        resp->cookie = argp->cookie;
 
        /* Don't accept test requests during grace period */
        if (nlmsvc_grace_period) {
                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 check for conflicting locks */
        resp->status = nlmsvc_testlock(rqstp, file, &argp->lock, &resp->lock, &resp->cookie);
        if (resp->status == nlm_drop_reply)
                return rpc_drop_reply;
 
        dprintk("lockd: TEST4          status %d\n", ntohl(resp->status));
        nlm_release_host(host);
        nlm_release_file(file);
        return rpc_success;
}
 
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;
 
        dprintk("lockd: LOCK          called\n");
 
        resp->cookie = argp->cookie;
 
        /* Don't accept new lock requests during grace period */
        if (nlmsvc_grace_period && !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;
 
#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, &argp->lock,
                                        argp->block, &argp->cookie);
        if (resp->status == nlm_drop_reply)
                return rpc_drop_reply;
 
        dprintk("lockd: LOCK          status %d\n", ntohl(resp->status));
        nlm_release_host(host);
        nlm_release_file(file);
        return rpc_success;
}
 
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 (nlmsvc_grace_period) {
                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(file, &argp->lock);
 
        dprintk("lockd: CANCEL        status %d\n", ntohl(resp->status));
        nlm_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 (nlmsvc_grace_period) {
                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(file, &argp->lock);
 
        dprintk("lockd: UNLOCK        status %d\n", ntohl(resp->status));
        nlm_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_in(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)
{
        nlm_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);
        if (call == NULL)
                return rpc_system_err;
 
        stat = func(rqstp, argp, &call->a_res);
        if (stat != 0) {
                nlm_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 (nlmsvc_grace_period && !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));
        nlm_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 (nlmsvc_grace_period) {
                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));
        nlm_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);
        nlm_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)
{
        struct sockaddr_in      saddr;
 
        memcpy(&saddr, svc_addr_in(rqstp), sizeof(saddr));
 
        dprintk("lockd: SM_NOTIFY     called\n");
        if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)
         || ntohs(saddr.sin_port) >= 1024) {
                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;
        }
 
        /* Obtain the host pointer for this NFS server and try to
         * reclaim all locks we hold on this server.
         */
        memset(&saddr, 0, sizeof(saddr));
        saddr.sin_addr.s_addr = argp->addr;
        nlm_host_rebooted(&saddr, argp->mon, argp->len, argp->state);
 
        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),
 
};

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[/] [test_project/] [trunk/] [linux_sd_driver/] [fs/] [lockd/] [svc4proc.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* linux/fs/lockd/svc4proc.c`
3			`*`
4			`* Lockd server procedures. We don't implement the NLM_*_RES`
5			`* procedures because we don't use the async procedures.`
6			`*`
7			`* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>`
8			`*/`
9
10			`#include <linux/types.h>`
11			`#include <linux/time.h>`
12			`#include <linux/slab.h>`
13			`#include <linux/in.h>`
14			`#include <linux/sunrpc/svc.h>`
15			`#include <linux/sunrpc/clnt.h>`
16			`#include <linux/nfsd/nfsd.h>`
17			`#include <linux/lockd/lockd.h>`
18			`#include <linux/lockd/share.h>`
19			`#include <linux/lockd/sm_inter.h>`
20
21
22			`#define NLMDBG_FACILITY NLMDBG_CLIENT`
23
24			`/*`
25			`* Obtain client and file from arguments`
26			`*/`
27			`static __be32`
28			`nlm4svc_retrieve_args(struct svc_rqst rqstp, struct nlm_args argp,`
29			`struct nlm_host hostp, struct nlm_file filp)`
30			`{`
31			`struct nlm_host *host = NULL;`
32			`struct nlm_file *file = NULL;`
33			`struct nlm_lock *lock = &argp->lock;`
34			`__be32 error = 0;`
35
36			`/* nfsd callbacks must have been installed for this procedure */`
37			`if (!nlmsvc_ops)`
38			`return nlm_lck_denied_nolocks;`
39
40			`/* Obtain host handle */`
41			`if (!(host = nlmsvc_lookup_host(rqstp, lock->caller, lock->len))`
42			`\|\| (argp->monitor && nsm_monitor(host) < 0))`
43			`goto no_locks;`
44			`*hostp = host;`
45
46			`/* Obtain file pointer. Not used by FREE_ALL call. */`
47			`if (filp != NULL) {`
48			`if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0)`
49			`goto no_locks;`
50			`*filp = file;`
51
52			`/* Set up the missing parts of the file_lock structure */`
53			`lock->fl.fl_file = file->f_file;`
54			`lock->fl.fl_owner = (fl_owner_t) host;`
55			`lock->fl.fl_lmops = &nlmsvc_lock_operations;`
56			`}`
57
58			`return 0;`
59
60			`no_locks:`
61			`if (host)`
62			`nlm_release_host(host);`
63			`if (error)`
64			`return error;`
65			`return nlm_lck_denied_nolocks;`
66			`}`
67
68			`/*`
69			`* NULL: Test for presence of service`
70			`*/`
71			`static __be32`
72			`nlm4svc_proc_null(struct svc_rqst rqstp, void argp, void *resp)`
73			`{`
74			`dprintk("lockd: NULL called\n");`
75			`return rpc_success;`
76			`}`
77
78			`/*`
79			`* TEST: Check for conflicting lock`
80			`*/`
81			`static __be32`
82			`nlm4svc_proc_test(struct svc_rqst rqstp, struct nlm_args argp,`
83			`struct nlm_res *resp)`
84			`{`
85			`struct nlm_host *host;`
86			`struct nlm_file *file;`
87
88			`dprintk("lockd: TEST4 called\n");`
89			`resp->cookie = argp->cookie;`
90
91			`/* Don't accept test requests during grace period */`
92			`if (nlmsvc_grace_period) {`
93			`resp->status = nlm_lck_denied_grace_period;`
94			`return rpc_success;`
95			`}`
96
97			`/* Obtain client and file */`
98			`if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))`
99			`return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;`
100
101			`/* Now check for conflicting locks */`
102			`resp->status = nlmsvc_testlock(rqstp, file, &argp->lock, &resp->lock, &resp->cookie);`
103			`if (resp->status == nlm_drop_reply)`
104			`return rpc_drop_reply;`
105
106			`dprintk("lockd: TEST4 status %d\n", ntohl(resp->status));`
107			`nlm_release_host(host);`
108			`nlm_release_file(file);`
109			`return rpc_success;`
110			`}`
111
112			`static __be32`
113			`nlm4svc_proc_lock(struct svc_rqst rqstp, struct nlm_args argp,`
114			`struct nlm_res *resp)`
115			`{`
116			`struct nlm_host *host;`
117			`struct nlm_file *file;`
118
119			`dprintk("lockd: LOCK called\n");`
120
121			`resp->cookie = argp->cookie;`
122
123			`/* Don't accept new lock requests during grace period */`
124			`if (nlmsvc_grace_period && !argp->reclaim) {`
125			`resp->status = nlm_lck_denied_grace_period;`
126			`return rpc_success;`
127			`}`
128
129			`/* Obtain client and file */`
130			`if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))`
131			`return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;`
132
133			`#if 0`
134			`/* If supplied state doesn't match current state, we assume it's`
135			`* an old request that time-warped somehow. Any error return would`
136			`* do in this case because it's irrelevant anyway.`
137			`*`
138			`* NB: We don't retrieve the remote host's state yet.`
139			`*/`
140			`if (host->h_nsmstate && host->h_nsmstate != argp->state) {`
141			`resp->status = nlm_lck_denied_nolocks;`
142			`} else`
143			`#endif`
144
145			`/* Now try to lock the file */`
146			`resp->status = nlmsvc_lock(rqstp, file, &argp->lock,`
147			`argp->block, &argp->cookie);`
148			`if (resp->status == nlm_drop_reply)`
149			`return rpc_drop_reply;`
150
151			`dprintk("lockd: LOCK status %d\n", ntohl(resp->status));`
152			`nlm_release_host(host);`
153			`nlm_release_file(file);`
154			`return rpc_success;`
155			`}`
156
157			`static __be32`
158			`nlm4svc_proc_cancel(struct svc_rqst rqstp, struct nlm_args argp,`
159			`struct nlm_res *resp)`
160			`{`
161			`struct nlm_host *host;`
162			`struct nlm_file *file;`
163
164			`dprintk("lockd: CANCEL called\n");`
165
166			`resp->cookie = argp->cookie;`
167
168			`/* Don't accept requests during grace period */`
169			`if (nlmsvc_grace_period) {`
170			`resp->status = nlm_lck_denied_grace_period;`
171			`return rpc_success;`
172			`}`
173
174			`/* Obtain client and file */`
175			`if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))`
176			`return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;`
177
178			`/* Try to cancel request. */`
179			`resp->status = nlmsvc_cancel_blocked(file, &argp->lock);`
180
181			`dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));`
182			`nlm_release_host(host);`
183			`nlm_release_file(file);`
184			`return rpc_success;`
185			`}`
186
187			`/*`
188			`* UNLOCK: release a lock`
189			`*/`
190			`static __be32`
191			`nlm4svc_proc_unlock(struct svc_rqst rqstp, struct nlm_args argp,`
192			`struct nlm_res *resp)`
193			`{`
194			`struct nlm_host *host;`
195			`struct nlm_file *file;`
196
197			`dprintk("lockd: UNLOCK called\n");`
198
199			`resp->cookie = argp->cookie;`
200
201			`/* Don't accept new lock requests during grace period */`
202			`if (nlmsvc_grace_period) {`
203			`resp->status = nlm_lck_denied_grace_period;`
204			`return rpc_success;`
205			`}`
206
207			`/* Obtain client and file */`
208			`if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))`
209			`return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;`
210
211			`/* Now try to remove the lock */`
212			`resp->status = nlmsvc_unlock(file, &argp->lock);`
213
214			`dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));`
215			`nlm_release_host(host);`
216			`nlm_release_file(file);`
217			`return rpc_success;`
218			`}`
219
220			`/*`
221			`* GRANTED: A server calls us to tell that a process' lock request`
222			`* was granted`
223			`*/`
224			`static __be32`
225			`nlm4svc_proc_granted(struct svc_rqst rqstp, struct nlm_args argp,`
226			`struct nlm_res *resp)`
227			`{`
228			`resp->cookie = argp->cookie;`
229
230			`dprintk("lockd: GRANTED called\n");`
231			`resp->status = nlmclnt_grant(svc_addr_in(rqstp), &argp->lock);`
232			`dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));`
233			`return rpc_success;`
234			`}`
235
236			`/*`
237			`* This is the generic lockd callback for async RPC calls`
238			`*/`
239			`static void nlm4svc_callback_exit(struct rpc_task task, void data)`
240			`{`
241			`dprintk("lockd: %5u callback returned %d\n", task->tk_pid,`
242			`-task->tk_status);`
243			`}`
244
245			`static void nlm4svc_callback_release(void *data)`
246			`{`
247			`nlm_release_call(data);`
248			`}`
249
250			`static const struct rpc_call_ops nlm4svc_callback_ops = {`
251			`.rpc_call_done = nlm4svc_callback_exit,`
252			`.rpc_release = nlm4svc_callback_release,`
253			`};`
254
255			`/*`
256			* `Async' versions of the above service routines. They aren't really,
257			`* because we send the callback before the reply proper. I hope this`
258			`* doesn't break any clients.`
259			`*/`
260			`static __be32 nlm4svc_callback(struct svc_rqst rqstp, u32 proc, struct nlm_args argp,`
261			`__be32 (func)(struct svc_rqst , struct nlm_args , struct nlm_res ))`
262			`{`
263			`struct nlm_host *host;`
264			`struct nlm_rqst *call;`
265			`__be32 stat;`
266
267			`host = nlmsvc_lookup_host(rqstp,`
268			`argp->lock.caller,`
269			`argp->lock.len);`
270			`if (host == NULL)`
271			`return rpc_system_err;`
272
273			`call = nlm_alloc_call(host);`
274			`if (call == NULL)`
275			`return rpc_system_err;`
276
277			`stat = func(rqstp, argp, &call->a_res);`
278			`if (stat != 0) {`
279			`nlm_release_call(call);`
280			`return stat;`
281			`}`
282
283			`call->a_flags = RPC_TASK_ASYNC;`
284			`if (nlm_async_reply(call, proc, &nlm4svc_callback_ops) < 0)`
285			`return rpc_system_err;`
286			`return rpc_success;`
287			`}`
288
289			`static __be32 nlm4svc_proc_test_msg(struct svc_rqst rqstp, struct nlm_args argp,`
290			`void *resp)`
291			`{`
292			`dprintk("lockd: TEST_MSG called\n");`
293			`return nlm4svc_callback(rqstp, NLMPROC_TEST_RES, argp, nlm4svc_proc_test);`
294			`}`
295
296			`static __be32 nlm4svc_proc_lock_msg(struct svc_rqst rqstp, struct nlm_args argp,`
297			`void *resp)`
298			`{`
299			`dprintk("lockd: LOCK_MSG called\n");`
300			`return nlm4svc_callback(rqstp, NLMPROC_LOCK_RES, argp, nlm4svc_proc_lock);`
301			`}`
302
303			`static __be32 nlm4svc_proc_cancel_msg(struct svc_rqst rqstp, struct nlm_args argp,`
304			`void *resp)`
305			`{`
306			`dprintk("lockd: CANCEL_MSG called\n");`
307			`return nlm4svc_callback(rqstp, NLMPROC_CANCEL_RES, argp, nlm4svc_proc_cancel);`
308			`}`
309
310			`static __be32 nlm4svc_proc_unlock_msg(struct svc_rqst rqstp, struct nlm_args argp,`
311			`void *resp)`
312			`{`
313			`dprintk("lockd: UNLOCK_MSG called\n");`
314			`return nlm4svc_callback(rqstp, NLMPROC_UNLOCK_RES, argp, nlm4svc_proc_unlock);`
315			`}`
316
317			`static __be32 nlm4svc_proc_granted_msg(struct svc_rqst rqstp, struct nlm_args argp,`
318			`void *resp)`
319			`{`
320			`dprintk("lockd: GRANTED_MSG called\n");`
321			`return nlm4svc_callback(rqstp, NLMPROC_GRANTED_RES, argp, nlm4svc_proc_granted);`
322			`}`
323
324			`/*`
325			`* SHARE: create a DOS share or alter existing share.`
326			`*/`
327			`static __be32`
328			`nlm4svc_proc_share(struct svc_rqst rqstp, struct nlm_args argp,`
329			`struct nlm_res *resp)`
330			`{`
331			`struct nlm_host *host;`
332			`struct nlm_file *file;`
333
334			`dprintk("lockd: SHARE called\n");`
335
336			`resp->cookie = argp->cookie;`
337
338			`/* Don't accept new lock requests during grace period */`
339			`if (nlmsvc_grace_period && !argp->reclaim) {`
340			`resp->status = nlm_lck_denied_grace_period;`
341			`return rpc_success;`
342			`}`
343
344			`/* Obtain client and file */`
345			`if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))`
346			`return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;`
347
348			`/* Now try to create the share */`
349			`resp->status = nlmsvc_share_file(host, file, argp);`
350
351			`dprintk("lockd: SHARE status %d\n", ntohl(resp->status));`
352			`nlm_release_host(host);`
353			`nlm_release_file(file);`
354			`return rpc_success;`
355			`}`
356
357			`/*`
358			`* UNSHARE: Release a DOS share.`
359			`*/`
360			`static __be32`
361			`nlm4svc_proc_unshare(struct svc_rqst rqstp, struct nlm_args argp,`
362			`struct nlm_res *resp)`
363			`{`
364			`struct nlm_host *host;`
365			`struct nlm_file *file;`
366
367			`dprintk("lockd: UNSHARE called\n");`
368
369			`resp->cookie = argp->cookie;`
370
371			`/* Don't accept requests during grace period */`
372			`if (nlmsvc_grace_period) {`
373			`resp->status = nlm_lck_denied_grace_period;`
374			`return rpc_success;`
375			`}`
376
377			`/* Obtain client and file */`
378			`if ((resp->status = nlm4svc_retrieve_args(rqstp, argp, &host, &file)))`
379			`return resp->status == nlm_drop_reply ? rpc_drop_reply :rpc_success;`
380
381			`/* Now try to lock the file */`
382			`resp->status = nlmsvc_unshare_file(host, file, argp);`
383
384			`dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));`
385			`nlm_release_host(host);`
386			`nlm_release_file(file);`
387			`return rpc_success;`
388			`}`
389
390			`/*`
391			`* NM_LOCK: Create an unmonitored lock`
392			`*/`
393			`static __be32`
394			`nlm4svc_proc_nm_lock(struct svc_rqst rqstp, struct nlm_args argp,`
395			`struct nlm_res *resp)`
396			`{`
397			`dprintk("lockd: NM_LOCK called\n");`
398
399			`argp->monitor = 0; /* just clean the monitor flag */`
400			`return nlm4svc_proc_lock(rqstp, argp, resp);`
401			`}`
402
403			`/*`
404			`* FREE_ALL: Release all locks and shares held by client`
405			`*/`
406			`static __be32`
407			`nlm4svc_proc_free_all(struct svc_rqst rqstp, struct nlm_args argp,`
408			`void *resp)`
409			`{`
410			`struct nlm_host *host;`
411
412			`/* Obtain client */`
413			`if (nlm4svc_retrieve_args(rqstp, argp, &host, NULL))`
414			`return rpc_success;`
415
416			`nlmsvc_free_host_resources(host);`
417			`nlm_release_host(host);`
418			`return rpc_success;`
419			`}`
420
421			`/*`
422			`* SM_NOTIFY: private callback from statd (not part of official NLM proto)`
423			`*/`
424			`static __be32`
425			`nlm4svc_proc_sm_notify(struct svc_rqst rqstp, struct nlm_reboot argp,`
426			`void *resp)`
427			`{`
428			`struct sockaddr_in saddr;`
429
430			`memcpy(&saddr, svc_addr_in(rqstp), sizeof(saddr));`
431
432			`dprintk("lockd: SM_NOTIFY called\n");`
433			`if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)`
434			`\|\| ntohs(saddr.sin_port) >= 1024) {`
435			`char buf[RPC_MAX_ADDRBUFLEN];`
436			`printk(KERN_WARNING "lockd: rejected NSM callback from %s\n",`
437			`svc_print_addr(rqstp, buf, sizeof(buf)));`
438			`return rpc_system_err;`
439			`}`
440
441			`/* Obtain the host pointer for this NFS server and try to`
442			`* reclaim all locks we hold on this server.`
443			`*/`
444			`memset(&saddr, 0, sizeof(saddr));`
445			`saddr.sin_addr.s_addr = argp->addr;`
446			`nlm_host_rebooted(&saddr, argp->mon, argp->len, argp->state);`
447
448			`return rpc_success;`
449			`}`
450
451			`/*`
452			`* client sent a GRANTED_RES, let's remove the associated block`
453			`*/`
454			`static __be32`
455			`nlm4svc_proc_granted_res(struct svc_rqst rqstp, struct nlm_res argp,`
456			`void *resp)`
457			`{`
458			`if (!nlmsvc_ops)`
459			`return rpc_success;`
460
461			`dprintk("lockd: GRANTED_RES called\n");`
462
463			`nlmsvc_grant_reply(&argp->cookie, argp->status);`
464			`return rpc_success;`
465			`}`
466
467
468			`/*`
469			`* NLM Server procedures.`
470			`*/`
471
472			`#define nlm4svc_encode_norep nlm4svc_encode_void`
473			`#define nlm4svc_decode_norep nlm4svc_decode_void`
474			`#define nlm4svc_decode_testres nlm4svc_decode_void`
475			`#define nlm4svc_decode_lockres nlm4svc_decode_void`
476			`#define nlm4svc_decode_unlockres nlm4svc_decode_void`
477			`#define nlm4svc_decode_cancelres nlm4svc_decode_void`
478			`#define nlm4svc_decode_grantedres nlm4svc_decode_void`
479
480			`#define nlm4svc_proc_none nlm4svc_proc_null`
481			`#define nlm4svc_proc_test_res nlm4svc_proc_null`
482			`#define nlm4svc_proc_lock_res nlm4svc_proc_null`
483			`#define nlm4svc_proc_cancel_res nlm4svc_proc_null`
484			`#define nlm4svc_proc_unlock_res nlm4svc_proc_null`
485
486			`struct nlm_void { int dummy; };`
487
488			`#define PROC(name, xargt, xrest, argt, rest, respsize) \`
489			`{ .pc_func = (svc_procfunc) nlm4svc_proc_##name, \`
490			`.pc_decode = (kxdrproc_t) nlm4svc_decode_##xargt, \`
491			`.pc_encode = (kxdrproc_t) nlm4svc_encode_##xrest, \`
492			`.pc_release = NULL, \`
493			`.pc_argsize = sizeof(struct nlm_##argt), \`
494			`.pc_ressize = sizeof(struct nlm_##rest), \`
495			`.pc_xdrressize = respsize, \`
496			`}`
497			`#define Ck (1+XDR_QUADLEN(NLM_MAXCOOKIELEN)) /* cookie */`
498			`#define No (1+1024/4) /* netobj */`
499			`#define St 1 /* status */`
500			`#define Rg 4 /* range (offset + length) */`
501			`struct svc_procedure nlmsvc_procedures4[] = {`
502			`PROC(null, void, void, void, void, 1),`
503			`PROC(test, testargs, testres, args, res, Ck+St+2+No+Rg),`
504			`PROC(lock, lockargs, res, args, res, Ck+St),`
505			`PROC(cancel, cancargs, res, args, res, Ck+St),`
506			`PROC(unlock, unlockargs, res, args, res, Ck+St),`
507			`PROC(granted, testargs, res, args, res, Ck+St),`
508			`PROC(test_msg, testargs, norep, args, void, 1),`
509			`PROC(lock_msg, lockargs, norep, args, void, 1),`
510			`PROC(cancel_msg, cancargs, norep, args, void, 1),`
511			`PROC(unlock_msg, unlockargs, norep, args, void, 1),`
512			`PROC(granted_msg, testargs, norep, args, void, 1),`
513			`PROC(test_res, testres, norep, res, void, 1),`
514			`PROC(lock_res, lockres, norep, res, void, 1),`
515			`PROC(cancel_res, cancelres, norep, res, void, 1),`
516			`PROC(unlock_res, unlockres, norep, res, void, 1),`
517			`PROC(granted_res, res, norep, res, void, 1),`
518			`/* statd callback */`
519			`PROC(sm_notify, reboot, void, reboot, void, 1),`
520			`PROC(none, void, void, void, void, 0),`
521			`PROC(none, void, void, void, void, 0),`
522			`PROC(none, void, void, void, void, 0),`
523			`PROC(share, shareargs, shareres, args, res, Ck+St+1),`
524			`PROC(unshare, shareargs, shareres, args, res, Ck+St+1),`
525			`PROC(nm_lock, lockargs, res, args, res, Ck+St),`
526			`PROC(free_all, notify, void, args, void, 1),`
527
528			`};`