| 1 |
1275 |
phoenix |
/*
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| 2 |
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* linux/fs/lockd/svcproc.c
|
| 3 |
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*
|
| 4 |
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* Lockd server procedures. We don't implement the NLM_*_RES
|
| 5 |
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* procedures because we don't use the async procedures.
|
| 6 |
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*
|
| 7 |
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* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
|
| 8 |
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*/
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| 9 |
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| 10 |
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#include <linux/config.h>
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| 11 |
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#include <linux/types.h>
|
| 12 |
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#include <linux/sched.h>
|
| 13 |
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#include <linux/slab.h>
|
| 14 |
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#include <linux/in.h>
|
| 15 |
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#include <linux/sunrpc/svc.h>
|
| 16 |
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#include <linux/sunrpc/clnt.h>
|
| 17 |
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#include <linux/nfsd/nfsd.h>
|
| 18 |
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#include <linux/lockd/lockd.h>
|
| 19 |
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#include <linux/lockd/share.h>
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| 20 |
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#include <linux/lockd/sm_inter.h>
|
| 21 |
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| 22 |
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| 23 |
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#define NLMDBG_FACILITY NLMDBG_CLIENT
|
| 24 |
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| 25 |
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static u32 nlmsvc_callback(struct svc_rqst *, u32, struct nlm_res *);
|
| 26 |
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static void nlmsvc_callback_exit(struct rpc_task *);
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| 27 |
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| 28 |
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#ifdef CONFIG_LOCKD_V4
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| 29 |
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static u32
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| 30 |
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cast_to_nlm(u32 status, u32 vers)
|
| 31 |
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{
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| 32 |
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/* Note: status is assumed to be in network byte order !!! */
|
| 33 |
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if (vers != 4){
|
| 34 |
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switch (status) {
|
| 35 |
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case nlm_granted:
|
| 36 |
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case nlm_lck_denied:
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| 37 |
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case nlm_lck_denied_nolocks:
|
| 38 |
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case nlm_lck_blocked:
|
| 39 |
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case nlm_lck_denied_grace_period:
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| 40 |
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break;
|
| 41 |
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case nlm4_deadlock:
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| 42 |
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status = nlm_lck_denied;
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| 43 |
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break;
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| 44 |
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default:
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| 45 |
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status = nlm_lck_denied_nolocks;
|
| 46 |
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}
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| 47 |
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}
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| 48 |
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| 49 |
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return (status);
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| 50 |
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}
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| 51 |
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#define cast_status(status) (cast_to_nlm(status, rqstp->rq_vers))
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| 52 |
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#else
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| 53 |
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#define cast_status(status) (status)
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| 54 |
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#endif
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| 55 |
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| 56 |
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/*
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| 57 |
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* Obtain client and file from arguments
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| 58 |
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*/
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| 59 |
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static u32
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| 60 |
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nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
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| 61 |
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struct nlm_host **hostp, struct nlm_file **filp)
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| 62 |
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{
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| 63 |
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struct nlm_host *host = NULL;
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| 64 |
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struct nlm_file *file = NULL;
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| 65 |
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struct nlm_lock *lock = &argp->lock;
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| 66 |
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u32 error;
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| 67 |
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| 68 |
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/* nfsd callbacks must have been installed for this procedure */
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| 69 |
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if (!nlmsvc_ops)
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| 70 |
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return nlm_lck_denied_nolocks;
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| 71 |
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| 72 |
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/* Obtain handle for client host */
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| 73 |
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if (rqstp->rq_client == NULL) {
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| 74 |
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printk(KERN_NOTICE
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| 75 |
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"lockd: unauthenticated request from (%08x:%d)\n",
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| 76 |
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ntohl(rqstp->rq_addr.sin_addr.s_addr),
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| 77 |
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ntohs(rqstp->rq_addr.sin_port));
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| 78 |
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return nlm_lck_denied_nolocks;
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| 79 |
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}
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| 80 |
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| 81 |
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/* Obtain host handle */
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| 82 |
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if (!(host = nlmsvc_lookup_host(rqstp))
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| 83 |
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|| (argp->monitor && !host->h_monitored && nsm_monitor(host) < 0))
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| 84 |
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goto no_locks;
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| 85 |
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*hostp = host;
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| 86 |
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| 87 |
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/* Obtain file pointer. Not used by FREE_ALL call. */
|
| 88 |
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if (filp != NULL) {
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| 89 |
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if ((error = nlm_lookup_file(rqstp, &file, &lock->fh)) != 0)
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| 90 |
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goto no_locks;
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| 91 |
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*filp = file;
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| 92 |
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| 93 |
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/* Set up the missing parts of the file_lock structure */
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| 94 |
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lock->fl.fl_file = &file->f_file;
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| 95 |
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lock->fl.fl_owner = (fl_owner_t) host;
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| 96 |
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}
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| 97 |
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| 98 |
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return 0;
|
| 99 |
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|
| 100 |
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no_locks:
|
| 101 |
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if (host)
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| 102 |
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nlm_release_host(host);
|
| 103 |
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return nlm_lck_denied_nolocks;
|
| 104 |
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}
|
| 105 |
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| 106 |
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/*
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| 107 |
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* NULL: Test for presence of service
|
| 108 |
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*/
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| 109 |
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static int
|
| 110 |
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nlmsvc_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
|
| 111 |
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{
|
| 112 |
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dprintk("lockd: NULL called\n");
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| 113 |
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return rpc_success;
|
| 114 |
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}
|
| 115 |
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|
| 116 |
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/*
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| 117 |
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* TEST: Check for conflicting lock
|
| 118 |
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*/
|
| 119 |
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static int
|
| 120 |
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nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 121 |
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struct nlm_res *resp)
|
| 122 |
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{
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| 123 |
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struct nlm_host *host;
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| 124 |
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struct nlm_file *file;
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| 125 |
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| 126 |
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dprintk("lockd: TEST called\n");
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| 127 |
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resp->cookie = argp->cookie;
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| 128 |
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| 129 |
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/* Don't accept test requests during grace period */
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| 130 |
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if (nlmsvc_grace_period) {
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| 131 |
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resp->status = nlm_lck_denied_grace_period;
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| 132 |
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return rpc_success;
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| 133 |
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}
|
| 134 |
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| 135 |
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/* Obtain client and file */
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| 136 |
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if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
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| 137 |
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return rpc_success;
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| 138 |
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|
| 139 |
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/* Now check for conflicting locks */
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| 140 |
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resp->status = cast_status(nlmsvc_testlock(file, &argp->lock, &resp->lock));
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| 141 |
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| 142 |
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dprintk("lockd: TEST status %d vers %d\n",
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| 143 |
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ntohl(resp->status), rqstp->rq_vers);
|
| 144 |
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nlm_release_host(host);
|
| 145 |
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nlm_release_file(file);
|
| 146 |
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return rpc_success;
|
| 147 |
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}
|
| 148 |
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|
| 149 |
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static int
|
| 150 |
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nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 151 |
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struct nlm_res *resp)
|
| 152 |
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{
|
| 153 |
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struct nlm_host *host;
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| 154 |
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struct nlm_file *file;
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| 155 |
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| 156 |
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dprintk("lockd: LOCK called\n");
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| 157 |
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| 158 |
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resp->cookie = argp->cookie;
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| 159 |
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| 160 |
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/* Don't accept new lock requests during grace period */
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| 161 |
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if (nlmsvc_grace_period && !argp->reclaim) {
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| 162 |
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resp->status = nlm_lck_denied_grace_period;
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| 163 |
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return rpc_success;
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| 164 |
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}
|
| 165 |
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| 166 |
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/* Obtain client and file */
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| 167 |
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if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
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| 168 |
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return rpc_success;
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| 169 |
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|
| 170 |
|
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#if 0
|
| 171 |
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/* If supplied state doesn't match current state, we assume it's
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| 172 |
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* an old request that time-warped somehow. Any error return would
|
| 173 |
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* do in this case because it's irrelevant anyway.
|
| 174 |
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*
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| 175 |
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* NB: We don't retrieve the remote host's state yet.
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| 176 |
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*/
|
| 177 |
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if (host->h_nsmstate && host->h_nsmstate != argp->state) {
|
| 178 |
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resp->status = nlm_lck_denied_nolocks;
|
| 179 |
|
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} else
|
| 180 |
|
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#endif
|
| 181 |
|
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|
| 182 |
|
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/* Now try to lock the file */
|
| 183 |
|
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resp->status = cast_status(nlmsvc_lock(rqstp, file, &argp->lock,
|
| 184 |
|
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argp->block, &argp->cookie));
|
| 185 |
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|
| 186 |
|
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dprintk("lockd: LOCK status %d\n", ntohl(resp->status));
|
| 187 |
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nlm_release_host(host);
|
| 188 |
|
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nlm_release_file(file);
|
| 189 |
|
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return rpc_success;
|
| 190 |
|
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}
|
| 191 |
|
|
|
| 192 |
|
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static int
|
| 193 |
|
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nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 194 |
|
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struct nlm_res *resp)
|
| 195 |
|
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{
|
| 196 |
|
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struct nlm_host *host;
|
| 197 |
|
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struct nlm_file *file;
|
| 198 |
|
|
|
| 199 |
|
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dprintk("lockd: CANCEL called\n");
|
| 200 |
|
|
|
| 201 |
|
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resp->cookie = argp->cookie;
|
| 202 |
|
|
|
| 203 |
|
|
/* Don't accept requests during grace period */
|
| 204 |
|
|
if (nlmsvc_grace_period) {
|
| 205 |
|
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resp->status = nlm_lck_denied_grace_period;
|
| 206 |
|
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return rpc_success;
|
| 207 |
|
|
}
|
| 208 |
|
|
|
| 209 |
|
|
/* Obtain client and file */
|
| 210 |
|
|
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
|
| 211 |
|
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return rpc_success;
|
| 212 |
|
|
|
| 213 |
|
|
/* Try to cancel request. */
|
| 214 |
|
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resp->status = cast_status(nlmsvc_cancel_blocked(file, &argp->lock));
|
| 215 |
|
|
|
| 216 |
|
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dprintk("lockd: CANCEL status %d\n", ntohl(resp->status));
|
| 217 |
|
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nlm_release_host(host);
|
| 218 |
|
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nlm_release_file(file);
|
| 219 |
|
|
return rpc_success;
|
| 220 |
|
|
}
|
| 221 |
|
|
|
| 222 |
|
|
/*
|
| 223 |
|
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* UNLOCK: release a lock
|
| 224 |
|
|
*/
|
| 225 |
|
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static int
|
| 226 |
|
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nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 227 |
|
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struct nlm_res *resp)
|
| 228 |
|
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{
|
| 229 |
|
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struct nlm_host *host;
|
| 230 |
|
|
struct nlm_file *file;
|
| 231 |
|
|
|
| 232 |
|
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dprintk("lockd: UNLOCK called\n");
|
| 233 |
|
|
|
| 234 |
|
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resp->cookie = argp->cookie;
|
| 235 |
|
|
|
| 236 |
|
|
/* Don't accept new lock requests during grace period */
|
| 237 |
|
|
if (nlmsvc_grace_period) {
|
| 238 |
|
|
resp->status = nlm_lck_denied_grace_period;
|
| 239 |
|
|
return rpc_success;
|
| 240 |
|
|
}
|
| 241 |
|
|
|
| 242 |
|
|
/* Obtain client and file */
|
| 243 |
|
|
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
|
| 244 |
|
|
return rpc_success;
|
| 245 |
|
|
|
| 246 |
|
|
/* Now try to remove the lock */
|
| 247 |
|
|
resp->status = cast_status(nlmsvc_unlock(file, &argp->lock));
|
| 248 |
|
|
|
| 249 |
|
|
dprintk("lockd: UNLOCK status %d\n", ntohl(resp->status));
|
| 250 |
|
|
nlm_release_host(host);
|
| 251 |
|
|
nlm_release_file(file);
|
| 252 |
|
|
return rpc_success;
|
| 253 |
|
|
}
|
| 254 |
|
|
|
| 255 |
|
|
/*
|
| 256 |
|
|
* GRANTED: A server calls us to tell that a process' lock request
|
| 257 |
|
|
* was granted
|
| 258 |
|
|
*/
|
| 259 |
|
|
static int
|
| 260 |
|
|
nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 261 |
|
|
struct nlm_res *resp)
|
| 262 |
|
|
{
|
| 263 |
|
|
resp->cookie = argp->cookie;
|
| 264 |
|
|
|
| 265 |
|
|
dprintk("lockd: GRANTED called\n");
|
| 266 |
|
|
resp->status = nlmclnt_grant(&argp->lock);
|
| 267 |
|
|
dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
|
| 268 |
|
|
return rpc_success;
|
| 269 |
|
|
}
|
| 270 |
|
|
|
| 271 |
|
|
/*
|
| 272 |
|
|
* `Async' versions of the above service routines. They aren't really,
|
| 273 |
|
|
* because we send the callback before the reply proper. I hope this
|
| 274 |
|
|
* doesn't break any clients.
|
| 275 |
|
|
*/
|
| 276 |
|
|
static int
|
| 277 |
|
|
nlmsvc_proc_test_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 278 |
|
|
void *resp)
|
| 279 |
|
|
{
|
| 280 |
|
|
struct nlm_res res;
|
| 281 |
|
|
u32 stat;
|
| 282 |
|
|
|
| 283 |
|
|
dprintk("lockd: TEST_MSG called\n");
|
| 284 |
|
|
|
| 285 |
|
|
memset(&res, 0, sizeof(res));
|
| 286 |
|
|
|
| 287 |
|
|
if ((stat = nlmsvc_proc_test(rqstp, argp, &res)) == 0)
|
| 288 |
|
|
stat = nlmsvc_callback(rqstp, NLMPROC_TEST_RES, &res);
|
| 289 |
|
|
return stat;
|
| 290 |
|
|
}
|
| 291 |
|
|
|
| 292 |
|
|
static int
|
| 293 |
|
|
nlmsvc_proc_lock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 294 |
|
|
void *resp)
|
| 295 |
|
|
{
|
| 296 |
|
|
struct nlm_res res;
|
| 297 |
|
|
u32 stat;
|
| 298 |
|
|
|
| 299 |
|
|
dprintk("lockd: LOCK_MSG called\n");
|
| 300 |
|
|
|
| 301 |
|
|
if ((stat = nlmsvc_proc_lock(rqstp, argp, &res)) == 0)
|
| 302 |
|
|
stat = nlmsvc_callback(rqstp, NLMPROC_LOCK_RES, &res);
|
| 303 |
|
|
return stat;
|
| 304 |
|
|
}
|
| 305 |
|
|
|
| 306 |
|
|
static int
|
| 307 |
|
|
nlmsvc_proc_cancel_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 308 |
|
|
void *resp)
|
| 309 |
|
|
{
|
| 310 |
|
|
struct nlm_res res;
|
| 311 |
|
|
u32 stat;
|
| 312 |
|
|
|
| 313 |
|
|
dprintk("lockd: CANCEL_MSG called\n");
|
| 314 |
|
|
|
| 315 |
|
|
if ((stat = nlmsvc_proc_cancel(rqstp, argp, &res)) == 0)
|
| 316 |
|
|
stat = nlmsvc_callback(rqstp, NLMPROC_CANCEL_RES, &res);
|
| 317 |
|
|
return stat;
|
| 318 |
|
|
}
|
| 319 |
|
|
|
| 320 |
|
|
static int
|
| 321 |
|
|
nlmsvc_proc_unlock_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 322 |
|
|
void *resp)
|
| 323 |
|
|
{
|
| 324 |
|
|
struct nlm_res res;
|
| 325 |
|
|
u32 stat;
|
| 326 |
|
|
|
| 327 |
|
|
dprintk("lockd: UNLOCK_MSG called\n");
|
| 328 |
|
|
|
| 329 |
|
|
if ((stat = nlmsvc_proc_unlock(rqstp, argp, &res)) == 0)
|
| 330 |
|
|
stat = nlmsvc_callback(rqstp, NLMPROC_UNLOCK_RES, &res);
|
| 331 |
|
|
return stat;
|
| 332 |
|
|
}
|
| 333 |
|
|
|
| 334 |
|
|
static int
|
| 335 |
|
|
nlmsvc_proc_granted_msg(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 336 |
|
|
void *resp)
|
| 337 |
|
|
{
|
| 338 |
|
|
struct nlm_res res;
|
| 339 |
|
|
u32 stat;
|
| 340 |
|
|
|
| 341 |
|
|
dprintk("lockd: GRANTED_MSG called\n");
|
| 342 |
|
|
|
| 343 |
|
|
if ((stat = nlmsvc_proc_granted(rqstp, argp, &res)) == 0)
|
| 344 |
|
|
stat = nlmsvc_callback(rqstp, NLMPROC_GRANTED_RES, &res);
|
| 345 |
|
|
return stat;
|
| 346 |
|
|
}
|
| 347 |
|
|
|
| 348 |
|
|
/*
|
| 349 |
|
|
* SHARE: create a DOS share or alter existing share.
|
| 350 |
|
|
*/
|
| 351 |
|
|
static int
|
| 352 |
|
|
nlmsvc_proc_share(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 353 |
|
|
struct nlm_res *resp)
|
| 354 |
|
|
{
|
| 355 |
|
|
struct nlm_host *host;
|
| 356 |
|
|
struct nlm_file *file;
|
| 357 |
|
|
|
| 358 |
|
|
dprintk("lockd: SHARE called\n");
|
| 359 |
|
|
|
| 360 |
|
|
resp->cookie = argp->cookie;
|
| 361 |
|
|
|
| 362 |
|
|
/* Don't accept new lock requests during grace period */
|
| 363 |
|
|
if (nlmsvc_grace_period && !argp->reclaim) {
|
| 364 |
|
|
resp->status = nlm_lck_denied_grace_period;
|
| 365 |
|
|
return rpc_success;
|
| 366 |
|
|
}
|
| 367 |
|
|
|
| 368 |
|
|
/* Obtain client and file */
|
| 369 |
|
|
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
|
| 370 |
|
|
return rpc_success;
|
| 371 |
|
|
|
| 372 |
|
|
/* Now try to create the share */
|
| 373 |
|
|
resp->status = cast_status(nlmsvc_share_file(host, file, argp));
|
| 374 |
|
|
|
| 375 |
|
|
dprintk("lockd: SHARE status %d\n", ntohl(resp->status));
|
| 376 |
|
|
nlm_release_host(host);
|
| 377 |
|
|
nlm_release_file(file);
|
| 378 |
|
|
return rpc_success;
|
| 379 |
|
|
}
|
| 380 |
|
|
|
| 381 |
|
|
/*
|
| 382 |
|
|
* UNSHARE: Release a DOS share.
|
| 383 |
|
|
*/
|
| 384 |
|
|
static int
|
| 385 |
|
|
nlmsvc_proc_unshare(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 386 |
|
|
struct nlm_res *resp)
|
| 387 |
|
|
{
|
| 388 |
|
|
struct nlm_host *host;
|
| 389 |
|
|
struct nlm_file *file;
|
| 390 |
|
|
|
| 391 |
|
|
dprintk("lockd: UNSHARE called\n");
|
| 392 |
|
|
|
| 393 |
|
|
resp->cookie = argp->cookie;
|
| 394 |
|
|
|
| 395 |
|
|
/* Don't accept requests during grace period */
|
| 396 |
|
|
if (nlmsvc_grace_period) {
|
| 397 |
|
|
resp->status = nlm_lck_denied_grace_period;
|
| 398 |
|
|
return rpc_success;
|
| 399 |
|
|
}
|
| 400 |
|
|
|
| 401 |
|
|
/* Obtain client and file */
|
| 402 |
|
|
if ((resp->status = nlmsvc_retrieve_args(rqstp, argp, &host, &file)))
|
| 403 |
|
|
return rpc_success;
|
| 404 |
|
|
|
| 405 |
|
|
/* Now try to unshare the file */
|
| 406 |
|
|
resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
|
| 407 |
|
|
|
| 408 |
|
|
dprintk("lockd: UNSHARE status %d\n", ntohl(resp->status));
|
| 409 |
|
|
nlm_release_host(host);
|
| 410 |
|
|
nlm_release_file(file);
|
| 411 |
|
|
return rpc_success;
|
| 412 |
|
|
}
|
| 413 |
|
|
|
| 414 |
|
|
/*
|
| 415 |
|
|
* NM_LOCK: Create an unmonitored lock
|
| 416 |
|
|
*/
|
| 417 |
|
|
static int
|
| 418 |
|
|
nlmsvc_proc_nm_lock(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 419 |
|
|
struct nlm_res *resp)
|
| 420 |
|
|
{
|
| 421 |
|
|
dprintk("lockd: NM_LOCK called\n");
|
| 422 |
|
|
|
| 423 |
|
|
argp->monitor = 0; /* just clean the monitor flag */
|
| 424 |
|
|
return nlmsvc_proc_lock(rqstp, argp, resp);
|
| 425 |
|
|
}
|
| 426 |
|
|
|
| 427 |
|
|
/*
|
| 428 |
|
|
* FREE_ALL: Release all locks and shares held by client
|
| 429 |
|
|
*/
|
| 430 |
|
|
static int
|
| 431 |
|
|
nlmsvc_proc_free_all(struct svc_rqst *rqstp, struct nlm_args *argp,
|
| 432 |
|
|
void *resp)
|
| 433 |
|
|
{
|
| 434 |
|
|
struct nlm_host *host;
|
| 435 |
|
|
|
| 436 |
|
|
/* Obtain client */
|
| 437 |
|
|
if (nlmsvc_retrieve_args(rqstp, argp, &host, NULL))
|
| 438 |
|
|
return rpc_success;
|
| 439 |
|
|
|
| 440 |
|
|
nlmsvc_free_host_resources(host);
|
| 441 |
|
|
nlm_release_host(host);
|
| 442 |
|
|
return rpc_success;
|
| 443 |
|
|
}
|
| 444 |
|
|
|
| 445 |
|
|
/*
|
| 446 |
|
|
* SM_NOTIFY: private callback from statd (not part of official NLM proto)
|
| 447 |
|
|
*/
|
| 448 |
|
|
static int
|
| 449 |
|
|
nlmsvc_proc_sm_notify(struct svc_rqst *rqstp, struct nlm_reboot *argp,
|
| 450 |
|
|
void *resp)
|
| 451 |
|
|
{
|
| 452 |
|
|
struct sockaddr_in saddr = rqstp->rq_addr;
|
| 453 |
|
|
int vers = rqstp->rq_vers;
|
| 454 |
|
|
int prot = rqstp->rq_prot;
|
| 455 |
|
|
struct nlm_host *host;
|
| 456 |
|
|
|
| 457 |
|
|
dprintk("lockd: SM_NOTIFY called\n");
|
| 458 |
|
|
if (saddr.sin_addr.s_addr != htonl(INADDR_LOOPBACK)
|
| 459 |
|
|
|| ntohs(saddr.sin_port) >= 1024) {
|
| 460 |
|
|
printk(KERN_WARNING
|
| 461 |
|
|
"lockd: rejected NSM callback from %08x:%d\n",
|
| 462 |
|
|
ntohl(rqstp->rq_addr.sin_addr.s_addr),
|
| 463 |
|
|
ntohs(rqstp->rq_addr.sin_port));
|
| 464 |
|
|
return rpc_system_err;
|
| 465 |
|
|
}
|
| 466 |
|
|
|
| 467 |
|
|
/* Obtain the host pointer for this NFS server and try to
|
| 468 |
|
|
* reclaim all locks we hold on this server.
|
| 469 |
|
|
*/
|
| 470 |
|
|
saddr.sin_addr.s_addr = argp->addr;
|
| 471 |
|
|
if ((host = nlmclnt_lookup_host(&saddr, prot, vers)) != NULL) {
|
| 472 |
|
|
nlmclnt_recovery(host, argp->state);
|
| 473 |
|
|
nlm_release_host(host);
|
| 474 |
|
|
}
|
| 475 |
|
|
|
| 476 |
|
|
/* If we run on an NFS server, delete all locks held by the client */
|
| 477 |
|
|
if (nlmsvc_ops != NULL) {
|
| 478 |
|
|
struct svc_client *clnt;
|
| 479 |
|
|
saddr.sin_addr.s_addr = argp->addr;
|
| 480 |
|
|
if ((clnt = nlmsvc_ops->exp_getclient(&saddr)) != NULL
|
| 481 |
|
|
&& (host = nlm_lookup_host(clnt, &saddr, 0, 0)) != NULL) {
|
| 482 |
|
|
nlmsvc_free_host_resources(host);
|
| 483 |
|
|
}
|
| 484 |
|
|
nlm_release_host(host);
|
| 485 |
|
|
}
|
| 486 |
|
|
|
| 487 |
|
|
return rpc_success;
|
| 488 |
|
|
}
|
| 489 |
|
|
|
| 490 |
|
|
/*
|
| 491 |
|
|
* client sent a GRANTED_RES, let's remove the associated block
|
| 492 |
|
|
*/
|
| 493 |
|
|
static int
|
| 494 |
|
|
nlmsvc_proc_granted_res(struct svc_rqst *rqstp, struct nlm_res *argp,
|
| 495 |
|
|
void *resp)
|
| 496 |
|
|
{
|
| 497 |
|
|
if (!nlmsvc_ops)
|
| 498 |
|
|
return rpc_success;
|
| 499 |
|
|
|
| 500 |
|
|
dprintk("lockd: GRANTED_RES called\n");
|
| 501 |
|
|
|
| 502 |
|
|
nlmsvc_grant_reply(rqstp, &argp->cookie, argp->status);
|
| 503 |
|
|
return rpc_success;
|
| 504 |
|
|
}
|
| 505 |
|
|
|
| 506 |
|
|
/*
|
| 507 |
|
|
* This is the generic lockd callback for async RPC calls
|
| 508 |
|
|
*/
|
| 509 |
|
|
static u32
|
| 510 |
|
|
nlmsvc_callback(struct svc_rqst *rqstp, u32 proc, struct nlm_res *resp)
|
| 511 |
|
|
{
|
| 512 |
|
|
struct nlm_host *host;
|
| 513 |
|
|
struct nlm_rqst *call;
|
| 514 |
|
|
|
| 515 |
|
|
if (!(call = nlmclnt_alloc_call()))
|
| 516 |
|
|
return rpc_system_err;
|
| 517 |
|
|
|
| 518 |
|
|
host = nlmclnt_lookup_host(&rqstp->rq_addr,
|
| 519 |
|
|
rqstp->rq_prot, rqstp->rq_vers);
|
| 520 |
|
|
if (!host) {
|
| 521 |
|
|
kfree(call);
|
| 522 |
|
|
return rpc_system_err;
|
| 523 |
|
|
}
|
| 524 |
|
|
|
| 525 |
|
|
call->a_flags = RPC_TASK_ASYNC;
|
| 526 |
|
|
call->a_host = host;
|
| 527 |
|
|
memcpy(&call->a_args, resp, sizeof(*resp));
|
| 528 |
|
|
|
| 529 |
|
|
if (nlmsvc_async_call(call, proc, nlmsvc_callback_exit) < 0)
|
| 530 |
|
|
goto error;
|
| 531 |
|
|
|
| 532 |
|
|
return rpc_success;
|
| 533 |
|
|
error:
|
| 534 |
|
|
nlm_release_host(host);
|
| 535 |
|
|
kfree(call);
|
| 536 |
|
|
return rpc_system_err;
|
| 537 |
|
|
}
|
| 538 |
|
|
|
| 539 |
|
|
static void
|
| 540 |
|
|
nlmsvc_callback_exit(struct rpc_task *task)
|
| 541 |
|
|
{
|
| 542 |
|
|
struct nlm_rqst *call = (struct nlm_rqst *) task->tk_calldata;
|
| 543 |
|
|
|
| 544 |
|
|
if (task->tk_status < 0) {
|
| 545 |
|
|
dprintk("lockd: %4d callback failed (errno = %d)\n",
|
| 546 |
|
|
task->tk_pid, -task->tk_status);
|
| 547 |
|
|
}
|
| 548 |
|
|
nlm_release_host(call->a_host);
|
| 549 |
|
|
kfree(call);
|
| 550 |
|
|
}
|
| 551 |
|
|
|
| 552 |
|
|
/*
|
| 553 |
|
|
* NLM Server procedures.
|
| 554 |
|
|
*/
|
| 555 |
|
|
|
| 556 |
|
|
#define nlmsvc_encode_norep nlmsvc_encode_void
|
| 557 |
|
|
#define nlmsvc_decode_norep nlmsvc_decode_void
|
| 558 |
|
|
#define nlmsvc_decode_testres nlmsvc_decode_void
|
| 559 |
|
|
#define nlmsvc_decode_lockres nlmsvc_decode_void
|
| 560 |
|
|
#define nlmsvc_decode_unlockres nlmsvc_decode_void
|
| 561 |
|
|
#define nlmsvc_decode_cancelres nlmsvc_decode_void
|
| 562 |
|
|
#define nlmsvc_decode_grantedres nlmsvc_decode_void
|
| 563 |
|
|
|
| 564 |
|
|
#define nlmsvc_proc_none nlmsvc_proc_null
|
| 565 |
|
|
#define nlmsvc_proc_test_res nlmsvc_proc_null
|
| 566 |
|
|
#define nlmsvc_proc_lock_res nlmsvc_proc_null
|
| 567 |
|
|
#define nlmsvc_proc_cancel_res nlmsvc_proc_null
|
| 568 |
|
|
#define nlmsvc_proc_unlock_res nlmsvc_proc_null
|
| 569 |
|
|
|
| 570 |
|
|
struct nlm_void { int dummy; };
|
| 571 |
|
|
|
| 572 |
|
|
#define PROC(name, xargt, xrest, argt, rest, respsize) \
|
| 573 |
|
|
{ (svc_procfunc) nlmsvc_proc_##name, \
|
| 574 |
|
|
(kxdrproc_t) nlmsvc_decode_##xargt, \
|
| 575 |
|
|
(kxdrproc_t) nlmsvc_encode_##xrest, \
|
| 576 |
|
|
NULL, \
|
| 577 |
|
|
sizeof(struct nlm_##argt), \
|
| 578 |
|
|
sizeof(struct nlm_##rest), \
|
| 579 |
|
|
0, \
|
| 580 |
|
|
0, \
|
| 581 |
|
|
respsize, \
|
| 582 |
|
|
}
|
| 583 |
|
|
|
| 584 |
|
|
#define Ck (1+8) /* cookie */
|
| 585 |
|
|
#define St 1 /* status */
|
| 586 |
|
|
#define No (1+1024/4) /* Net Obj */
|
| 587 |
|
|
#define Rg 2 /* range - offset + size */
|
| 588 |
|
|
|
| 589 |
|
|
struct svc_procedure nlmsvc_procedures[] = {
|
| 590 |
|
|
PROC(null, void, void, void, void, 1),
|
| 591 |
|
|
PROC(test, testargs, testres, args, res, Ck+St+2+No+Rg),
|
| 592 |
|
|
PROC(lock, lockargs, res, args, res, Ck+St),
|
| 593 |
|
|
PROC(cancel, cancargs, res, args, res, Ck+St),
|
| 594 |
|
|
PROC(unlock, unlockargs, res, args, res, Ck+St),
|
| 595 |
|
|
PROC(granted, testargs, res, args, res, Ck+St),
|
| 596 |
|
|
PROC(test_msg, testargs, norep, args, void, 1),
|
| 597 |
|
|
PROC(lock_msg, lockargs, norep, args, void, 1),
|
| 598 |
|
|
PROC(cancel_msg, cancargs, norep, args, void, 1),
|
| 599 |
|
|
PROC(unlock_msg, unlockargs, norep, args, void, 1),
|
| 600 |
|
|
PROC(granted_msg, testargs, norep, args, void, 1),
|
| 601 |
|
|
PROC(test_res, testres, norep, res, void, 1),
|
| 602 |
|
|
PROC(lock_res, lockres, norep, res, void, 1),
|
| 603 |
|
|
PROC(cancel_res, cancelres, norep, res, void, 1),
|
| 604 |
|
|
PROC(unlock_res, unlockres, norep, res, void, 1),
|
| 605 |
|
|
PROC(granted_res, res, norep, res, void, 1),
|
| 606 |
|
|
/* statd callback */
|
| 607 |
|
|
PROC(sm_notify, reboot, void, reboot, void, 1),
|
| 608 |
|
|
PROC(none, void, void, void, void, 1),
|
| 609 |
|
|
PROC(none, void, void, void, void, 1),
|
| 610 |
|
|
PROC(none, void, void, void, void, 1),
|
| 611 |
|
|
PROC(share, shareargs, shareres, args, res, Ck+St+1),
|
| 612 |
|
|
PROC(unshare, shareargs, shareres, args, res, Ck+St+1),
|
| 613 |
|
|
PROC(nm_lock, lockargs, res, args, res, Ck+St),
|
| 614 |
|
|
PROC(free_all, notify, void, args, void, 0),
|
| 615 |
|
|
|
| 616 |
|
|
};
|
