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nfsd: Allow containers to set supported nfs versions
Support use of the --nfs-version/--no-nfs-version arguments to rpc.nfsd in containers. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Trond Myklebust
J. Bruce Fields
parent
029be5d033
commit
e333f3bbef
5 changed files with 197 additions and 61 deletions
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@ -134,10 +134,18 @@ struct nfsd_net {
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u32 s2s_cp_cl_id;
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struct idr s2s_cp_stateids;
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spinlock_t s2s_cp_lock;
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/*
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* Version information
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*/
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bool *nfsd_versions;
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bool *nfsd4_minorversions;
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};
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/* Simple check to find out if a given net was properly initialized */
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#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
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extern void nfsd_netns_free_versions(struct nfsd_net *nn);
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extern unsigned int nfsd_net_id;
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#endif /* __NFSD_NETNS_H__ */
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@ -1926,6 +1926,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
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struct nfsd4_compound_state *cstate = &resp->cstate;
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struct svc_fh *current_fh = &cstate->current_fh;
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struct svc_fh *save_fh = &cstate->save_fh;
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struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
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__be32 status;
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svcxdr_init_encode(rqstp, resp);
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@ -1948,7 +1949,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
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* According to RFC3010, this takes precedence over all other errors.
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*/
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status = nfserr_minor_vers_mismatch;
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if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
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if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
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goto out;
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status = nfserr_resource;
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if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
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@ -537,14 +537,14 @@ static ssize_t write_pool_threads(struct file *file, char *buf, size_t size)
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}
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static ssize_t
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nfsd_print_version_support(char *buf, int remaining, const char *sep,
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unsigned vers, int minor)
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nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining,
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const char *sep, unsigned vers, int minor)
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{
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const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u";
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bool supported = !!nfsd_vers(vers, NFSD_TEST);
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bool supported = !!nfsd_vers(nn, vers, NFSD_TEST);
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if (vers == 4 && minor >= 0 &&
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!nfsd_minorversion(minor, NFSD_TEST))
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!nfsd_minorversion(nn, minor, NFSD_TEST))
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supported = false;
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if (minor == 0 && supported)
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/*
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@ -599,20 +599,20 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
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switch(num) {
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case 2:
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case 3:
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nfsd_vers(num, cmd);
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nfsd_vers(nn, num, cmd);
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break;
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case 4:
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if (*minorp == '.') {
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if (nfsd_minorversion(minor, cmd) < 0)
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if (nfsd_minorversion(nn, minor, cmd) < 0)
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return -EINVAL;
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} else if ((cmd == NFSD_SET) != nfsd_vers(num, NFSD_TEST)) {
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} else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) {
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/*
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* Either we have +4 and no minors are enabled,
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* or we have -4 and at least one minor is enabled.
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* In either case, propagate 'cmd' to all minors.
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*/
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minor = 0;
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while (nfsd_minorversion(minor, cmd) >= 0)
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while (nfsd_minorversion(nn, minor, cmd) >= 0)
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minor++;
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}
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break;
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@ -624,7 +624,7 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
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/* If all get turned off, turn them back on, as
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* having no versions is BAD
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*/
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nfsd_reset_versions();
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nfsd_reset_versions(nn);
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}
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/* Now write current state into reply buffer */
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@ -633,12 +633,12 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
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remaining = SIMPLE_TRANSACTION_LIMIT;
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for (num=2 ; num <= 4 ; num++) {
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int minor;
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if (!nfsd_vers(num, NFSD_AVAIL))
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if (!nfsd_vers(nn, num, NFSD_AVAIL))
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continue;
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minor = -1;
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do {
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len = nfsd_print_version_support(buf, remaining,
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len = nfsd_print_version_support(nn, buf, remaining,
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sep, num, minor);
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if (len >= remaining)
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goto out;
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@ -1239,6 +1239,8 @@ static __net_init int nfsd_init_net(struct net *net)
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retval = nfsd_idmap_init(net);
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if (retval)
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goto out_idmap_error;
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nn->nfsd_versions = NULL;
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nn->nfsd4_minorversions = NULL;
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nn->nfsd4_lease = 90; /* default lease time */
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nn->nfsd4_grace = 90;
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nn->somebody_reclaimed = false;
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@ -1261,6 +1263,7 @@ static __net_exit void nfsd_exit_net(struct net *net)
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{
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nfsd_idmap_shutdown(net);
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nfsd_export_shutdown(net);
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nfsd_netns_free_versions(net_generic(net, nfsd_net_id));
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}
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static struct pernet_operations nfsd_net_ops = {
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@ -98,10 +98,12 @@ extern const struct svc_version nfsd_acl_version3;
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#endif
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#endif
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struct nfsd_net;
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enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
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int nfsd_vers(int vers, enum vers_op change);
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int nfsd_minorversion(u32 minorversion, enum vers_op change);
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void nfsd_reset_versions(void);
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int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
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int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
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void nfsd_reset_versions(struct nfsd_net *nn);
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int nfsd_create_serv(struct net *net);
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extern int nfsd_max_blksize;
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214
fs/nfsd/nfssvc.c
214
fs/nfsd/nfssvc.c
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@ -38,12 +38,18 @@ static int nfsd_acl_rpcbind_set(struct net *,
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u32, int,
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unsigned short,
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unsigned short);
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static __be32 nfsd_acl_init_request(struct svc_rqst *,
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const struct svc_program *,
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struct svc_process_info *);
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#endif
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static int nfsd_rpcbind_set(struct net *,
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const struct svc_program *,
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u32, int,
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unsigned short,
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unsigned short);
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static __be32 nfsd_init_request(struct svc_rqst *,
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const struct svc_program *,
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struct svc_process_info *);
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/*
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* nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members
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@ -98,7 +104,7 @@ static struct svc_program nfsd_acl_program = {
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.pg_class = "nfsd",
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.pg_stats = &nfsd_acl_svcstats,
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.pg_authenticate = &svc_set_client,
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.pg_init_request = svc_generic_init_request,
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.pg_init_request = nfsd_acl_init_request,
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.pg_rpcbind_set = nfsd_acl_rpcbind_set,
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};
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@ -119,7 +125,6 @@ static const struct svc_version *nfsd_version[] = {
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#define NFSD_MINVERS 2
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#define NFSD_NRVERS ARRAY_SIZE(nfsd_version)
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static const struct svc_version *nfsd_versions[NFSD_NRVERS];
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struct svc_program nfsd_program = {
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#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
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@ -127,78 +132,136 @@ struct svc_program nfsd_program = {
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#endif
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.pg_prog = NFS_PROGRAM, /* program number */
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.pg_nvers = NFSD_NRVERS, /* nr of entries in nfsd_version */
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.pg_vers = nfsd_versions, /* version table */
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.pg_vers = nfsd_version, /* version table */
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.pg_name = "nfsd", /* program name */
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.pg_class = "nfsd", /* authentication class */
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.pg_stats = &nfsd_svcstats, /* version table */
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.pg_authenticate = &svc_set_client, /* export authentication */
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.pg_init_request = svc_generic_init_request,
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.pg_init_request = nfsd_init_request,
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.pg_rpcbind_set = nfsd_rpcbind_set,
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};
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static bool nfsd_supported_minorversions[NFSD_SUPPORTED_MINOR_VERSION + 1] = {
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[0] = 1,
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[1] = 1,
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[2] = 1,
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};
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static bool
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nfsd_support_version(int vers)
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{
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if (vers >= NFSD_MINVERS && vers < NFSD_NRVERS)
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return nfsd_version[vers] != NULL;
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return false;
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}
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int nfsd_vers(int vers, enum vers_op change)
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static bool *
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nfsd_alloc_versions(void)
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{
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bool *vers = kmalloc_array(NFSD_NRVERS, sizeof(bool), GFP_KERNEL);
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unsigned i;
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if (vers) {
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/* All compiled versions are enabled by default */
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for (i = 0; i < NFSD_NRVERS; i++)
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vers[i] = nfsd_support_version(i);
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}
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return vers;
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}
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static bool *
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nfsd_alloc_minorversions(void)
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{
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bool *vers = kmalloc_array(NFSD_SUPPORTED_MINOR_VERSION + 1,
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sizeof(bool), GFP_KERNEL);
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unsigned i;
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if (vers) {
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/* All minor versions are enabled by default */
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for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++)
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vers[i] = nfsd_support_version(4);
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}
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return vers;
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}
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void
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nfsd_netns_free_versions(struct nfsd_net *nn)
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{
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kfree(nn->nfsd_versions);
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kfree(nn->nfsd4_minorversions);
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nn->nfsd_versions = NULL;
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nn->nfsd4_minorversions = NULL;
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}
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static void
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nfsd_netns_init_versions(struct nfsd_net *nn)
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{
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if (!nn->nfsd_versions) {
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nn->nfsd_versions = nfsd_alloc_versions();
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nn->nfsd4_minorversions = nfsd_alloc_minorversions();
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if (!nn->nfsd_versions || !nn->nfsd4_minorversions)
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nfsd_netns_free_versions(nn);
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}
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}
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int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change)
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{
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if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
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return 0;
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switch(change) {
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case NFSD_SET:
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nfsd_versions[vers] = nfsd_version[vers];
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#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
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if (vers < NFSD_ACL_NRVERS)
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nfsd_acl_versions[vers] = nfsd_acl_version[vers];
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#endif
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if (nn->nfsd_versions)
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nn->nfsd_versions[vers] = nfsd_support_version(vers);
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break;
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case NFSD_CLEAR:
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nfsd_versions[vers] = NULL;
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#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
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if (vers < NFSD_ACL_NRVERS)
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nfsd_acl_versions[vers] = NULL;
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#endif
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nfsd_netns_init_versions(nn);
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if (nn->nfsd_versions)
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nn->nfsd_versions[vers] = false;
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break;
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case NFSD_TEST:
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return nfsd_versions[vers] != NULL;
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if (nn->nfsd_versions)
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return nn->nfsd_versions[vers];
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/* Fallthrough */
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case NFSD_AVAIL:
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return nfsd_version[vers] != NULL;
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return nfsd_support_version(vers);
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}
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return 0;
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}
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static void
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nfsd_adjust_nfsd_versions4(void)
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nfsd_adjust_nfsd_versions4(struct nfsd_net *nn)
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{
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unsigned i;
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for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++) {
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if (nfsd_supported_minorversions[i])
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if (nn->nfsd4_minorversions[i])
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return;
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}
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nfsd_vers(4, NFSD_CLEAR);
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nfsd_vers(nn, 4, NFSD_CLEAR);
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}
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int nfsd_minorversion(u32 minorversion, enum vers_op change)
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int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change)
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{
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if (minorversion > NFSD_SUPPORTED_MINOR_VERSION &&
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change != NFSD_AVAIL)
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return -1;
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switch(change) {
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case NFSD_SET:
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nfsd_supported_minorversions[minorversion] = true;
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nfsd_vers(4, NFSD_SET);
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if (nn->nfsd4_minorversions) {
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nfsd_vers(nn, 4, NFSD_SET);
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nn->nfsd4_minorversions[minorversion] =
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nfsd_vers(nn, 4, NFSD_TEST);
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}
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break;
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case NFSD_CLEAR:
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nfsd_supported_minorversions[minorversion] = false;
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nfsd_adjust_nfsd_versions4();
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nfsd_netns_init_versions(nn);
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if (nn->nfsd4_minorversions) {
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nn->nfsd4_minorversions[minorversion] = false;
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nfsd_adjust_nfsd_versions4(nn);
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}
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break;
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case NFSD_TEST:
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return nfsd_supported_minorversions[minorversion];
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if (nn->nfsd4_minorversions)
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return nn->nfsd4_minorversions[minorversion];
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return nfsd_vers(nn, 4, NFSD_TEST);
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case NFSD_AVAIL:
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return minorversion <= NFSD_SUPPORTED_MINOR_VERSION;
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return minorversion <= NFSD_SUPPORTED_MINOR_VERSION &&
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nfsd_vers(nn, 4, NFSD_AVAIL);
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}
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return 0;
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}
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@ -280,13 +343,9 @@ static void nfsd_shutdown_generic(void)
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nfsd_racache_shutdown();
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}
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static bool nfsd_needs_lockd(void)
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static bool nfsd_needs_lockd(struct nfsd_net *nn)
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{
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#if defined(CONFIG_NFSD_V3)
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return (nfsd_versions[2] != NULL) || (nfsd_versions[3] != NULL);
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#else
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return (nfsd_versions[2] != NULL);
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#endif
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return nfsd_vers(nn, 2, NFSD_TEST) || nfsd_vers(nn, 3, NFSD_TEST);
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}
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static int nfsd_startup_net(int nrservs, struct net *net)
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@ -304,7 +363,7 @@ static int nfsd_startup_net(int nrservs, struct net *net)
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if (ret)
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goto out_socks;
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if (nfsd_needs_lockd() && !nn->lockd_up) {
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if (nfsd_needs_lockd(nn) && !nn->lockd_up) {
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ret = lockd_up(net);
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if (ret)
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goto out_socks;
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@ -437,20 +496,20 @@ static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
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nfsd_export_flush(net);
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}
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void nfsd_reset_versions(void)
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void nfsd_reset_versions(struct nfsd_net *nn)
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{
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int i;
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for (i = 0; i < NFSD_NRVERS; i++)
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if (nfsd_vers(i, NFSD_TEST))
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if (nfsd_vers(nn, i, NFSD_TEST))
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return;
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for (i = 0; i < NFSD_NRVERS; i++)
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if (i != 4)
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nfsd_vers(i, NFSD_SET);
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nfsd_vers(nn, i, NFSD_SET);
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else {
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int minor = 0;
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while (nfsd_minorversion(minor, NFSD_SET) >= 0)
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while (nfsd_minorversion(nn, minor, NFSD_SET) >= 0)
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minor++;
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}
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}
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@ -518,7 +577,7 @@ int nfsd_create_serv(struct net *net)
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}
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if (nfsd_max_blksize == 0)
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nfsd_max_blksize = nfsd_get_default_max_blksize();
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nfsd_reset_versions();
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nfsd_reset_versions(nn);
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nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
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&nfsd_thread_sv_ops);
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if (nn->nfsd_serv == NULL)
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@ -697,11 +756,44 @@ nfsd_acl_rpcbind_set(struct net *net, const struct svc_program *progp,
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unsigned short port)
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{
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if (!nfsd_support_acl_version(version) ||
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||||
!nfsd_vers(version, NFSD_TEST))
|
||||
!nfsd_vers(net_generic(net, nfsd_net_id), version, NFSD_TEST))
|
||||
return 0;
|
||||
return svc_generic_rpcbind_set(net, progp, version, family,
|
||||
proto, port);
|
||||
}
|
||||
|
||||
static __be32
|
||||
nfsd_acl_init_request(struct svc_rqst *rqstp,
|
||||
const struct svc_program *progp,
|
||||
struct svc_process_info *ret)
|
||||
{
|
||||
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
|
||||
int i;
|
||||
|
||||
if (likely(nfsd_support_acl_version(rqstp->rq_vers) &&
|
||||
nfsd_vers(nn, rqstp->rq_vers, NFSD_TEST)))
|
||||
return svc_generic_init_request(rqstp, progp, ret);
|
||||
|
||||
ret->mismatch.lovers = NFSD_ACL_NRVERS;
|
||||
for (i = NFSD_ACL_MINVERS; i < NFSD_ACL_NRVERS; i++) {
|
||||
if (nfsd_support_acl_version(rqstp->rq_vers) &&
|
||||
nfsd_vers(nn, i, NFSD_TEST)) {
|
||||
ret->mismatch.lovers = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (ret->mismatch.lovers == NFSD_ACL_NRVERS)
|
||||
return rpc_prog_unavail;
|
||||
ret->mismatch.hivers = NFSD_ACL_MINVERS;
|
||||
for (i = NFSD_ACL_NRVERS - 1; i >= NFSD_ACL_MINVERS; i--) {
|
||||
if (nfsd_support_acl_version(rqstp->rq_vers) &&
|
||||
nfsd_vers(nn, i, NFSD_TEST)) {
|
||||
ret->mismatch.hivers = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
return rpc_prog_mismatch;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int
|
||||
|
|
@ -709,12 +801,42 @@ nfsd_rpcbind_set(struct net *net, const struct svc_program *progp,
|
|||
u32 version, int family, unsigned short proto,
|
||||
unsigned short port)
|
||||
{
|
||||
if (!nfsd_vers(version, NFSD_TEST))
|
||||
if (!nfsd_vers(net_generic(net, nfsd_net_id), version, NFSD_TEST))
|
||||
return 0;
|
||||
return svc_generic_rpcbind_set(net, progp, version, family,
|
||||
proto, port);
|
||||
}
|
||||
|
||||
static __be32
|
||||
nfsd_init_request(struct svc_rqst *rqstp,
|
||||
const struct svc_program *progp,
|
||||
struct svc_process_info *ret)
|
||||
{
|
||||
struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
|
||||
int i;
|
||||
|
||||
if (likely(nfsd_vers(nn, rqstp->rq_vers, NFSD_TEST)))
|
||||
return svc_generic_init_request(rqstp, progp, ret);
|
||||
|
||||
ret->mismatch.lovers = NFSD_NRVERS;
|
||||
for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) {
|
||||
if (nfsd_vers(nn, i, NFSD_TEST)) {
|
||||
ret->mismatch.lovers = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (ret->mismatch.lovers == NFSD_NRVERS)
|
||||
return rpc_prog_unavail;
|
||||
ret->mismatch.hivers = NFSD_MINVERS;
|
||||
for (i = NFSD_NRVERS - 1; i >= NFSD_MINVERS; i--) {
|
||||
if (nfsd_vers(nn, i, NFSD_TEST)) {
|
||||
ret->mismatch.hivers = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
return rpc_prog_mismatch;
|
||||
}
|
||||
|
||||
/*
|
||||
* This is the NFS server kernel thread
|
||||
*/
|
||||
|
|
|
|||
Loading…
Reference in a new issue