diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-11 10:33:13 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-11 10:33:13 -0700 |
commit | c742b63473b3c5180db8b5d74fdbd56e4371dfa2 (patch) | |
tree | e0f317452689a21a2f08ceef7b211feac6c1a4ab /net/sunrpc | |
parent | b29482fde649c72441d5478a4ea2c52c56d97a5e (diff) | |
parent | 1eb2f96d0bffb2cca1fb7249ad9b6b4daa1d1d6a (diff) |
Merge tag 'nfsd-5.8' of git://linux-nfs.org/~bfields/linux
Pull nfsd updates from Bruce Fields:
"Highlights:
- Keep nfsd clients from unnecessarily breaking their own
delegations.
Note this requires a small kthreadd addition. The result is Tejun
Heo's suggestion (see link), and he was OK with this going through
my tree.
- Patch nfsd/clients/ to display filenames, and to fix byte-order
when displaying stateid's.
- fix a module loading/unloading bug, from Neil Brown.
- A big series from Chuck Lever with RPC/RDMA and tracing
improvements, and lay some groundwork for RPC-over-TLS"
Link: https://lore.kernel.org/r/1588348912-24781-1-git-send-email-bfields@redhat.com
* tag 'nfsd-5.8' of git://linux-nfs.org/~bfields/linux: (49 commits)
sunrpc: use kmemdup_nul() in gssp_stringify()
nfsd: safer handling of corrupted c_type
nfsd4: make drc_slab global, not per-net
SUNRPC: Remove unreachable error condition in rpcb_getport_async()
nfsd: Fix svc_xprt refcnt leak when setup callback client failed
sunrpc: clean up properly in gss_mech_unregister()
sunrpc: svcauth_gss_register_pseudoflavor must reject duplicate registrations.
sunrpc: check that domain table is empty at module unload.
NFSD: Fix improperly-formatted Doxygen comments
NFSD: Squash an annoying compiler warning
SUNRPC: Clean up request deferral tracepoints
NFSD: Add tracepoints for monitoring NFSD callbacks
NFSD: Add tracepoints to the NFSD state management code
NFSD: Add tracepoints to NFSD's duplicate reply cache
SUNRPC: svc_show_status() macro should have enum definitions
SUNRPC: Restructure svc_udp_recvfrom()
SUNRPC: Refactor svc_recvfrom()
SUNRPC: Clean up svc_release_skb() functions
SUNRPC: Refactor recvfrom path dealing with incomplete TCP receives
SUNRPC: Replace dprintk() call sites in TCP receive path
...
Diffstat (limited to 'net/sunrpc')
-rw-r--r-- | net/sunrpc/auth_gss/gss_mech_switch.c | 12 | ||||
-rw-r--r-- | net/sunrpc/auth_gss/gss_rpc_upcall.c | 2 | ||||
-rw-r--r-- | net/sunrpc/auth_gss/svcauth_gss.c | 18 | ||||
-rw-r--r-- | net/sunrpc/rpcb_clnt.c | 6 | ||||
-rw-r--r-- | net/sunrpc/sunrpc.h | 1 | ||||
-rw-r--r-- | net/sunrpc/sunrpc_syms.c | 2 | ||||
-rw-r--r-- | net/sunrpc/svc.c | 29 | ||||
-rw-r--r-- | net/sunrpc/svc_xprt.c | 53 | ||||
-rw-r--r-- | net/sunrpc/svcauth.c | 25 | ||||
-rw-r--r-- | net/sunrpc/svcauth_unix.c | 9 | ||||
-rw-r--r-- | net/sunrpc/svcsock.c | 400 | ||||
-rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_backchannel.c | 121 | ||||
-rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 21 | ||||
-rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_rw.c | 92 | ||||
-rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_sendto.c | 10 | ||||
-rw-r--r-- | net/sunrpc/xprtrdma/svc_rdma_transport.c | 55 | ||||
-rw-r--r-- | net/sunrpc/xprtsock.c | 12 |
17 files changed, 407 insertions, 461 deletions
diff --git a/net/sunrpc/auth_gss/gss_mech_switch.c b/net/sunrpc/auth_gss/gss_mech_switch.c index 69316ab1b9fa..fae632da1058 100644 --- a/net/sunrpc/auth_gss/gss_mech_switch.c +++ b/net/sunrpc/auth_gss/gss_mech_switch.c @@ -37,6 +37,8 @@ gss_mech_free(struct gss_api_mech *gm) for (i = 0; i < gm->gm_pf_num; i++) { pf = &gm->gm_pfs[i]; + if (pf->domain) + auth_domain_put(pf->domain); kfree(pf->auth_domain_name); pf->auth_domain_name = NULL; } @@ -59,6 +61,7 @@ make_auth_domain_name(char *name) static int gss_mech_svc_setup(struct gss_api_mech *gm) { + struct auth_domain *dom; struct pf_desc *pf; int i, status; @@ -68,10 +71,13 @@ gss_mech_svc_setup(struct gss_api_mech *gm) status = -ENOMEM; if (pf->auth_domain_name == NULL) goto out; - status = svcauth_gss_register_pseudoflavor(pf->pseudoflavor, - pf->auth_domain_name); - if (status) + dom = svcauth_gss_register_pseudoflavor( + pf->pseudoflavor, pf->auth_domain_name); + if (IS_ERR(dom)) { + status = PTR_ERR(dom); goto out; + } + pf->domain = dom; } return 0; out: diff --git a/net/sunrpc/auth_gss/gss_rpc_upcall.c b/net/sunrpc/auth_gss/gss_rpc_upcall.c index 0349f455a862..af9c7f43859c 100644 --- a/net/sunrpc/auth_gss/gss_rpc_upcall.c +++ b/net/sunrpc/auth_gss/gss_rpc_upcall.c @@ -223,7 +223,7 @@ static int gssp_alloc_receive_pages(struct gssx_arg_accept_sec_context *arg) static char *gssp_stringify(struct xdr_netobj *netobj) { - return kstrndup(netobj->data, netobj->len, GFP_KERNEL); + return kmemdup_nul(netobj->data, netobj->len, GFP_KERNEL); } static void gssp_hostbased_service(char **principal) diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 50d93c49ef1a..46027d0c903f 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -809,7 +809,7 @@ u32 svcauth_gss_flavor(struct auth_domain *dom) EXPORT_SYMBOL_GPL(svcauth_gss_flavor); -int +struct auth_domain * svcauth_gss_register_pseudoflavor(u32 pseudoflavor, char * name) { struct gss_domain *new; @@ -826,21 +826,23 @@ svcauth_gss_register_pseudoflavor(u32 pseudoflavor, char * name) new->h.flavour = &svcauthops_gss; new->pseudoflavor = pseudoflavor; - stat = 0; test = auth_domain_lookup(name, &new->h); - if (test != &new->h) { /* Duplicate registration */ + if (test != &new->h) { + pr_warn("svc: duplicate registration of gss pseudo flavour %s.\n", + name); + stat = -EADDRINUSE; auth_domain_put(test); - kfree(new->h.name); - goto out_free_dom; + goto out_free_name; } - return 0; + return test; +out_free_name: + kfree(new->h.name); out_free_dom: kfree(new); out: - return stat; + return ERR_PTR(stat); } - EXPORT_SYMBOL_GPL(svcauth_gss_register_pseudoflavor); static inline int diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c index 4a020b688860..c27123e6ba80 100644 --- a/net/sunrpc/rpcb_clnt.c +++ b/net/sunrpc/rpcb_clnt.c @@ -795,12 +795,6 @@ void rpcb_getport_async(struct rpc_task *task) child = rpcb_call_async(rpcb_clnt, map, proc); rpc_release_client(rpcb_clnt); - if (IS_ERR(child)) { - /* rpcb_map_release() has freed the arguments */ - dprintk("RPC: %5u %s: rpc_run_task failed\n", - task->tk_pid, __func__); - return; - } xprt->stat.bind_count++; rpc_put_task(child); diff --git a/net/sunrpc/sunrpc.h b/net/sunrpc/sunrpc.h index 47a756503d11..f6fe2e6cd65a 100644 --- a/net/sunrpc/sunrpc.h +++ b/net/sunrpc/sunrpc.h @@ -52,4 +52,5 @@ static inline int sock_is_loopback(struct sock *sk) int rpc_clients_notifier_register(void); void rpc_clients_notifier_unregister(void); +void auth_domain_cleanup(void); #endif /* _NET_SUNRPC_SUNRPC_H */ diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c index f9edaa9174a4..236fadc4a439 100644 --- a/net/sunrpc/sunrpc_syms.c +++ b/net/sunrpc/sunrpc_syms.c @@ -23,6 +23,7 @@ #include <linux/sunrpc/rpc_pipe_fs.h> #include <linux/sunrpc/xprtsock.h> +#include "sunrpc.h" #include "netns.h" unsigned int sunrpc_net_id; @@ -131,6 +132,7 @@ cleanup_sunrpc(void) unregister_rpc_pipefs(); rpc_destroy_mempool(); unregister_pernet_subsys(&sunrpc_net_ops); + auth_domain_cleanup(); #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) rpc_unregister_sysctl(); #endif diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index 9ed3126600ce..c211b607239e 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -88,15 +88,15 @@ param_get_pool_mode(char *buf, const struct kernel_param *kp) switch (*ip) { case SVC_POOL_AUTO: - return strlcpy(buf, "auto", 20); + return strlcpy(buf, "auto\n", 20); case SVC_POOL_GLOBAL: - return strlcpy(buf, "global", 20); + return strlcpy(buf, "global\n", 20); case SVC_POOL_PERCPU: - return strlcpy(buf, "percpu", 20); + return strlcpy(buf, "percpu\n", 20); case SVC_POOL_PERNODE: - return strlcpy(buf, "pernode", 20); + return strlcpy(buf, "pernode\n", 20); default: - return sprintf(buf, "%d", *ip); + return sprintf(buf, "%d\n", *ip); } } @@ -991,6 +991,7 @@ static int __svc_register(struct net *net, const char *progname, #endif } + trace_svc_register(progname, version, protocol, port, family, error); return error; } @@ -1000,11 +1001,6 @@ int svc_rpcbind_set_version(struct net *net, unsigned short proto, unsigned short port) { - dprintk("svc: svc_register(%sv%d, %s, %u, %u)\n", - progp->pg_name, version, - proto == IPPROTO_UDP? "udp" : "tcp", - port, family); - return __svc_register(net, progp->pg_name, progp->pg_prog, version, family, proto, port); @@ -1024,11 +1020,8 @@ int svc_generic_rpcbind_set(struct net *net, return 0; if (vers->vs_hidden) { - dprintk("svc: svc_register(%sv%d, %s, %u, %u)" - " (but not telling portmap)\n", - progp->pg_name, version, - proto == IPPROTO_UDP? "udp" : "tcp", - port, family); + trace_svc_noregister(progp->pg_name, version, proto, + port, family, 0); return 0; } @@ -1106,8 +1099,7 @@ static void __svc_unregister(struct net *net, const u32 program, const u32 versi if (error == -EPROTONOSUPPORT) error = rpcb_register(net, program, version, 0, 0); - dprintk("svc: %s(%sv%u), error %d\n", - __func__, progname, version, error); + trace_svc_unregister(progname, version, error); } /* @@ -1132,9 +1124,6 @@ static void svc_unregister(const struct svc_serv *serv, struct net *net) continue; if (progp->pg_vers[i]->vs_hidden) continue; - - dprintk("svc: attempting to unregister %sv%u\n", - progp->pg_name, i); __svc_unregister(net, progp->pg_prog, i, progp->pg_name); } } diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 2284ff038dad..c1ff8cdb5b2b 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -153,6 +153,7 @@ static void svc_xprt_free(struct kref *kref) xprt_put(xprt->xpt_bc_xprt); if (xprt->xpt_bc_xps) xprt_switch_put(xprt->xpt_bc_xps); + trace_svc_xprt_free(xprt); xprt->xpt_ops->xpo_free(xprt); module_put(owner); } @@ -206,6 +207,7 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl, .sin6_port = htons(port), }; #endif + struct svc_xprt *xprt; struct sockaddr *sap; size_t len; @@ -224,7 +226,11 @@ static struct svc_xprt *__svc_xpo_create(struct svc_xprt_class *xcl, return ERR_PTR(-EAFNOSUPPORT); } - return xcl->xcl_ops->xpo_create(serv, net, sap, len, flags); + xprt = xcl->xcl_ops->xpo_create(serv, net, sap, len, flags); + if (IS_ERR(xprt)) + trace_svc_xprt_create_err(serv->sv_program->pg_name, + xcl->xcl_name, sap, xprt); + return xprt; } /* @@ -304,15 +310,11 @@ int svc_create_xprt(struct svc_serv *serv, const char *xprt_name, { int err; - dprintk("svc: creating transport %s[%d]\n", xprt_name, port); err = _svc_create_xprt(serv, xprt_name, net, family, port, flags, cred); if (err == -EPROTONOSUPPORT) { request_module("svc%s", xprt_name); err = _svc_create_xprt(serv, xprt_name, net, family, port, flags, cred); } - if (err < 0) - dprintk("svc: transport %s not found, err %d\n", - xprt_name, -err); return err; } EXPORT_SYMBOL_GPL(svc_create_xprt); @@ -780,7 +782,6 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt) int len = 0; if (test_bit(XPT_CLOSE, &xprt->xpt_flags)) { - dprintk("svc_recv: found XPT_CLOSE\n"); if (test_and_clear_bit(XPT_KILL_TEMP, &xprt->xpt_flags)) xprt->xpt_ops->xpo_kill_temp_xprt(xprt); svc_delete_xprt(xprt); @@ -799,6 +800,7 @@ static int svc_handle_xprt(struct svc_rqst *rqstp, struct svc_xprt *xprt) if (newxpt) { newxpt->xpt_cred = get_cred(xprt->xpt_cred); svc_add_new_temp_xprt(serv, newxpt); + trace_svc_xprt_accept(newxpt, serv->sv_name); } else module_put(xprt->xpt_class->xcl_owner); } else if (svc_xprt_reserve_slot(rqstp, xprt)) { @@ -835,14 +837,6 @@ int svc_recv(struct svc_rqst *rqstp, long timeout) struct svc_serv *serv = rqstp->rq_server; int len, err; - dprintk("svc: server %p waiting for data (to = %ld)\n", - rqstp, timeout); - - if (rqstp->rq_xprt) - printk(KERN_ERR - "svc_recv: service %p, transport not NULL!\n", - rqstp); - err = svc_alloc_arg(rqstp); if (err) goto out; @@ -890,7 +884,6 @@ EXPORT_SYMBOL_GPL(svc_recv); void svc_drop(struct svc_rqst *rqstp) { trace_svc_drop(rqstp); - dprintk("svc: xprt %p dropped request\n", rqstp->rq_xprt); svc_xprt_release(rqstp); } EXPORT_SYMBOL_GPL(svc_drop); @@ -914,16 +907,10 @@ int svc_send(struct svc_rqst *rqstp) xb->page_len + xb->tail[0].iov_len; trace_svc_sendto(xb); - - /* Grab mutex to serialize outgoing data. */ - mutex_lock(&xprt->xpt_mutex); trace_svc_stats_latency(rqstp); - if (test_bit(XPT_DEAD, &xprt->xpt_flags) - || test_bit(XPT_CLOSE, &xprt->xpt_flags)) - len = -ENOTCONN; - else - len = xprt->xpt_ops->xpo_sendto(rqstp); - mutex_unlock(&xprt->xpt_mutex); + + len = xprt->xpt_ops->xpo_sendto(rqstp); + trace_svc_send(rqstp, len); svc_xprt_release(rqstp); @@ -1031,11 +1018,10 @@ static void svc_delete_xprt(struct svc_xprt *xprt) struct svc_serv *serv = xprt->xpt_server; struct svc_deferred_req *dr; - /* Only do this once */ if (test_and_set_bit(XPT_DEAD, &xprt->xpt_flags)) - BUG(); + return; - dprintk("svc: svc_delete_xprt(%p)\n", xprt); + trace_svc_xprt_detach(xprt); xprt->xpt_ops->xpo_detach(xprt); if (xprt->xpt_bc_xprt) xprt->xpt_bc_xprt->ops->close(xprt->xpt_bc_xprt); @@ -1056,6 +1042,7 @@ static void svc_delete_xprt(struct svc_xprt *xprt) void svc_close_xprt(struct svc_xprt *xprt) { + trace_svc_xprt_close(xprt); set_bit(XPT_CLOSE, &xprt->xpt_flags); if (test_and_set_bit(XPT_BUSY, &xprt->xpt_flags)) /* someone else will have to effect the close */ @@ -1158,16 +1145,15 @@ static void svc_revisit(struct cache_deferred_req *dreq, int too_many) set_bit(XPT_DEFERRED, &xprt->xpt_flags); if (too_many || test_bit(XPT_DEAD, &xprt->xpt_flags)) { spin_unlock(&xprt->xpt_lock); - dprintk("revisit canceled\n"); + trace_svc_defer_drop(dr); svc_xprt_put(xprt); - trace_svc_drop_deferred(dr); kfree(dr); return; } - dprintk("revisit queued\n"); dr->xprt = NULL; list_add(&dr->handle.recent, &xprt->xpt_deferred); spin_unlock(&xprt->xpt_lock); + trace_svc_defer_queue(dr); svc_xprt_enqueue(xprt); svc_xprt_put(xprt); } @@ -1213,22 +1199,24 @@ static struct cache_deferred_req *svc_defer(struct cache_req *req) memcpy(dr->args, rqstp->rq_arg.head[0].iov_base - skip, dr->argslen << 2); } + trace_svc_defer(rqstp); svc_xprt_get(rqstp->rq_xprt); dr->xprt = rqstp->rq_xprt; set_bit(RQ_DROPME, &rqstp->rq_flags); dr->handle.revisit = svc_revisit; - trace_svc_defer(rqstp); return &dr->handle; } /* * recv data from a deferred request into an active one */ -static int svc_deferred_recv(struct svc_rqst *rqstp) +static noinline int svc_deferred_recv(struct svc_rqst *rqstp) { struct svc_deferred_req *dr = rqstp->rq_deferred; + trace_svc_defer_recv(dr); + /* setup iov_base past transport header */ rqstp->rq_arg.head[0].iov_base = dr->args + (dr->xprt_hlen>>2); /* The iov_len does not include the transport header bytes */ @@ -1259,7 +1247,6 @@ static struct svc_deferred_req *svc_deferred_dequeue(struct svc_xprt *xprt) struct svc_deferred_req, handle.recent); list_del_init(&dr->handle.recent); - trace_svc_revisit_deferred(dr); } else clear_bit(XPT_DEFERRED, &xprt->xpt_flags); spin_unlock(&xprt->xpt_lock); diff --git a/net/sunrpc/svcauth.c b/net/sunrpc/svcauth.c index 552617e3467b..998b196b6176 100644 --- a/net/sunrpc/svcauth.c +++ b/net/sunrpc/svcauth.c @@ -21,6 +21,8 @@ #include <trace/events/sunrpc.h> +#include "sunrpc.h" + #define RPCDBG_FACILITY RPCDBG_AUTH @@ -205,3 +207,26 @@ struct auth_domain *auth_domain_find(char *name) return NULL; } EXPORT_SYMBOL_GPL(auth_domain_find); + +/** + * auth_domain_cleanup - check that the auth_domain table is empty + * + * On module unload the auth_domain_table must be empty. To make it + * easier to catch bugs which don't clean up domains properly, we + * warn if anything remains in the table at cleanup time. + * + * Note that we cannot proactively remove the domains at this stage. + * The ->release() function might be in a module that has already been + * unloaded. + */ + +void auth_domain_cleanup(void) +{ + int h; + struct auth_domain *hp; + + for (h = 0; h < DN_HASHMAX; h++) + hlist_for_each_entry(hp, &auth_domain_table[h], hash) + pr_warn("svc: domain %s still present at module unload.\n", + hp->name); +} diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c index 6c8f802c4261..97c0bddba7a3 100644 --- a/net/sunrpc/svcauth_unix.c +++ b/net/sunrpc/svcauth_unix.c @@ -332,15 +332,6 @@ static int __ip_map_update(struct cache_detail *cd, struct ip_map *ipm, return 0; } -static inline int ip_map_update(struct net *net, struct ip_map *ipm, - struct unix_domain *udom, time64_t expiry) -{ - struct sunrpc_net *sn; - - sn = net_generic(net, sunrpc_net_id); - return __ip_map_update(sn->ip_map_cache, ipm, udom, expiry); -} - void svcauth_unix_purge(struct net *net) { struct sunrpc_net *sn; diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index e7a0037d9b56..5c4ec9386f81 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -45,7 +45,6 @@ #include <net/tcp_states.h> #include <linux/uaccess.h> #include <asm/ioctls.h> -#include <trace/events/skb.h> #include <linux/sunrpc/types.h> #include <linux/sunrpc/clnt.h> @@ -55,6 +54,8 @@ #include <linux/sunrpc/stats.h> #include <linux/sunrpc/xprt.h> +#include <trace/events/sunrpc.h> + #include "socklib.h" #include "sunrpc.h" @@ -108,31 +109,35 @@ static void svc_reclassify_socket(struct socket *sock) } #endif -/* - * Release an skbuff after use +/** + * svc_tcp_release_rqst - Release transport-related resources + * @rqstp: request structure with resources to be released + * */ -static void svc_release_skb(struct svc_rqst *rqstp) +static void svc_tcp_release_rqst(struct svc_rqst *rqstp) { struct sk_buff *skb = rqstp->rq_xprt_ctxt; if (skb) { struct svc_sock *svsk = container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); - rqstp->rq_xprt_ctxt = NULL; - dprintk("svc: service %p, releasing skb %p\n", rqstp, skb); + rqstp->rq_xprt_ctxt = NULL; skb_free_datagram_locked(svsk->sk_sk, skb); } } -static void svc_release_udp_skb(struct svc_rqst *rqstp) +/** + * svc_udp_release_rqst - Release transport-related resources + * @rqstp: request structure with resources to be released + * + */ +static void svc_udp_release_rqst(struct svc_rqst *rqstp) { struct sk_buff *skb = rqstp->rq_xprt_ctxt; if (skb) { rqstp->rq_xprt_ctxt = NULL; - - dprintk("svc: service %p, releasing skb %p\n", rqstp, skb); consume_skb(skb); } } @@ -218,34 +223,68 @@ static int svc_one_sock_name(struct svc_sock *svsk, char *buf, int remaining) return len; } +#if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE +static void svc_flush_bvec(const struct bio_vec *bvec, size_t size, size_t seek) +{ + struct bvec_iter bi = { + .bi_size = size, + }; + struct bio_vec bv; + + bvec_iter_advance(bvec, &bi, seek & PAGE_MASK); + for_each_bvec(bv, bvec, bi, bi) + flush_dcache_page(bv.bv_page); +} +#else +static inline void svc_flush_bvec(const struct bio_vec *bvec, size_t size, + size_t seek) +{ +} +#endif + /* - * Generic recvfrom routine. + * Read from @rqstp's transport socket. The incoming message fills whole + * pages in @rqstp's rq_pages array until the last page of the message + * has been received into a partial page. */ -static ssize_t svc_recvfrom(struct svc_rqst *rqstp, struct kvec *iov, - unsigned int nr, size_t buflen, unsigned int base) +static ssize_t svc_tcp_read_msg(struct svc_rqst *rqstp, size_t buflen, + size_t seek) { struct svc_sock *svsk = container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt); + struct bio_vec *bvec = rqstp->rq_bvec; struct msghdr msg = { NULL }; + unsigned int i; ssize_t len; + size_t t; rqstp->rq_xprt_hlen = 0; clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); - iov_iter_kvec(&msg.msg_iter, READ, iov, nr, buflen); - if (base != 0) { - iov_iter_advance(&msg.msg_iter, base); - buflen -= base; + + for (i = 0, t = 0; t < buflen; i++, t += PAGE_SIZE) { + bvec[i].bv_page = rqstp->rq_pages[i]; + bvec[i].bv_len = PAGE_SIZE; + bvec[i].bv_offset = 0; + } + rqstp->rq_respages = &rqstp->rq_pages[i]; + rqstp->rq_next_page = rqstp->rq_respages + 1; + + iov_iter_bvec(&msg.msg_iter, READ, bvec, i, buflen); + if (seek) { + iov_iter_advance(&msg.msg_iter, seek); + buflen -= seek; } len = sock_recvmsg(svsk->sk_sock, &msg, MSG_DONTWAIT); + if (len > 0) + svc_flush_bvec(bvec, len, seek); + /* If we read a full record, then assume there may be more * data to read (stream based sockets only!) */ if (len == buflen) set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); - dprintk("svc: socket %p recvfrom(%p, %zu) = %zd\n", - svsk, iov[0].iov_base, iov[0].iov_len, len); return len; } @@ -282,13 +321,10 @@ static void svc_data_ready(struct sock *sk) struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; if (svsk) { - dprintk("svc: socket %p(inet %p), busy=%d\n", - svsk, sk, - test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags)); - /* Refer to svc_setup_socket() for details. */ rmb(); svsk->sk_odata(sk); + trace_svcsock_data_ready(&svsk->sk_xprt, 0); if (!test_and_set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags)) svc_xprt_enqueue(&svsk->sk_xprt); } @@ -302,11 +338,9 @@ static void svc_write_space(struct sock *sk) struct svc_sock *svsk = (struct svc_sock *)(sk->sk_user_data); if (svsk) { - dprintk("svc: socket %p(inet %p), write_space busy=%d\n", - svsk, sk, test_bit(XPT_BUSY, &svsk->sk_xprt.xpt_flags)); - /* Refer to svc_setup_socket() for details. */ rmb(); + trace_svcsock_write_space(&svsk->sk_xprt, 0); svsk->sk_owspace(sk); svc_xprt_enqueue(&svsk->sk_xprt); } @@ -383,8 +417,15 @@ static int svc_udp_get_dest_address(struct svc_rqst *rqstp, return 0; } -/* - * Receive a datagram from a UDP socket. +/** + * svc_udp_recvfrom - Receive a datagram from a UDP socket. + * @rqstp: request structure into which to receive an RPC Call + * + * Called in a loop when XPT_DATA has been set. + * + * Returns: + * On success, the number of bytes in a received RPC Call, or + * %0 if a complete RPC Call message was not ready to return */ static int svc_udp_recvfrom(struct svc_rqst *rqstp) { @@ -418,20 +459,14 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) svc_sock_setbufsize(svsk, serv->sv_nrthreads + 3); clear_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); - skb = NULL; err = kernel_recvmsg(svsk->sk_sock, &msg, NULL, 0, 0, MSG_PEEK | MSG_DONTWAIT); - if (err >= 0) - skb = skb_recv_udp(svsk->sk_sk, 0, 1, &err); - - if (skb == NULL) { - if (err != -EAGAIN) { - /* possibly an icmp error */ - dprintk("svc: recvfrom returned error %d\n", -err); - set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); - } - return 0; - } + if (err < 0) + goto out_recv_err; + skb = skb_recv_udp(svsk->sk_sk, 0, 1, &err); + if (!skb) + goto out_recv_err; + len = svc_addr_len(svc_addr(rqstp)); rqstp->rq_addrlen = len; if (skb->tstamp == 0) { @@ -442,26 +477,21 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) sock_write_timestamp(svsk->sk_sk, skb->tstamp); set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); /* there may be more data... */ - len = skb->len; + len = skb->len; rqstp->rq_arg.len = len; + trace_svcsock_udp_recv(&svsk->sk_xprt, len); rqstp->rq_prot = IPPROTO_UDP; - if (!svc_udp_get_dest_address(rqstp, cmh)) { - net_warn_ratelimited("svc: received unknown control message %d/%d; dropping RPC reply datagram\n", - cmh->cmsg_level, cmh->cmsg_type); - goto out_free; - } + if (!svc_udp_get_dest_address(rqstp, cmh)) + goto out_cmsg_err; rqstp->rq_daddrlen = svc_addr_len(svc_daddr(rqstp)); if (skb_is_nonlinear(skb)) { /* we have to copy */ local_bh_disable(); - if (csum_partial_copy_to_xdr(&rqstp->rq_arg, skb)) { - local_bh_enable(); - /* checksum error */ - goto out_free; - } + if (csum_partial_copy_to_xdr(&rqstp->rq_arg, skb)) + goto out_bh_enable; local_bh_enable(); consume_skb(skb); } else { @@ -489,6 +519,20 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) serv->sv_stats->netudpcnt++; return len; + +out_recv_err: + if (err != -EAGAIN) { + /* possibly an icmp error */ + set_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags); + } + trace_svcsock_udp_recv_err(&svsk->sk_xprt, err); + return 0; +out_cmsg_err: + net_warn_ratelimited("svc: received unknown control message %d/%d; dropping RPC reply datagram\n", + cmh->cmsg_level, cmh->cmsg_type); + goto out_free; +out_bh_enable: + local_bh_enable(); out_free: kfree_skb(skb); return 0; @@ -498,6 +542,9 @@ out_free: * svc_udp_sendto - Send out a reply on a UDP socket * @rqstp: completed svc_rqst * + * xpt_mutex ensures @rqstp's whole message is written to the socket + * without interruption. + * * Returns the number of bytes sent, or a negative errno. */ static int svc_udp_sendto(struct svc_rqst *rqstp) @@ -519,10 +566,15 @@ static int svc_udp_sendto(struct svc_rqst *rqstp) unsigned int uninitialized_var(sent); int err; - svc_release_udp_skb(rqstp); + svc_udp_release_rqst(rqstp); svc_set_cmsg_data(rqstp, cmh); + mutex_lock(&xprt->xpt_mutex); + + if (svc_xprt_is_dead(xprt)) + goto out_notconn; + err = xprt_sock_sendmsg(svsk->sk_sock, &msg, xdr, 0, 0, &sent); xdr_free_bvec(xdr); if (err == -ECONNREFUSED) { @@ -530,9 +582,16 @@ static int svc_udp_sendto(struct svc_rqst *rqstp) err = xprt_sock_sendmsg(svsk->sk_sock, &msg, xdr, 0, 0, &sent); xdr_free_bvec(xdr); } + trace_svcsock_udp_send(xprt, err); + + mutex_unlock(&xprt->xpt_mutex); if (err < 0) return err; return sent; + +out_notconn: + mutex_unlock(&xprt->xpt_mutex); + return -ENOTCONN; } static int svc_udp_has_wspace(struct svc_xprt *xprt) @@ -576,7 +635,7 @@ static const struct svc_xprt_ops svc_udp_ops = { .xpo_recvfrom = svc_udp_recvfrom, .xpo_sendto = svc_udp_sendto, .xpo_read_payload = svc_sock_read_payload, - .xpo_release_rqst = svc_release_udp_skb, + .xpo_release_rqst = svc_udp_release_rqst, .xpo_detach = svc_sock_detach, .xpo_free = svc_sock_free, .xpo_has_wspace = svc_udp_has_wspace, @@ -632,9 +691,6 @@ static void svc_tcp_listen_data_ready(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; - dprintk("svc: socket %p TCP (listen) state change %d\n", - sk, sk->sk_state); - if (svsk) { /* Refer to svc_setup_socket() for details. */ rmb(); @@ -655,8 +711,7 @@ static void svc_tcp_listen_data_ready(struct sock *sk) if (svsk) { set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); svc_xprt_enqueue(&svsk->sk_xprt); - } else - printk("svc: socket %p: no user data\n", sk); + } } } @@ -667,15 +722,11 @@ static void svc_tcp_state_change(struct sock *sk) { struct svc_sock *svsk = (struct svc_sock *)sk->sk_user_data; - dprintk("svc: socket %p TCP (connected) state change %d (svsk %p)\n", - sk, sk->sk_state, sk->sk_user_data); - - if (!svsk) - printk("svc: socket %p: no user data\n", sk); - else { + if (svsk) { /* Refer to svc_setup_socket() for details. */ rmb(); svsk->sk_ostate(sk); + trace_svcsock_tcp_state(&svsk->sk_xprt, svsk->sk_sock); if (sk->sk_state != TCP_ESTABLISHED) { set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags); svc_xprt_enqueue(&svsk->sk_xprt); @@ -696,9 +747,7 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) struct socket *newsock; struct svc_sock *newsvsk; int err, slen; - RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); - dprintk("svc: tcp_accept %p sock %p\n", svsk, sock); if (!sock) return NULL; @@ -711,30 +760,18 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) else if (err != -EAGAIN) net_warn_ratelimited("%s: accept failed (err %d)!\n", serv->sv_name, -err); + trace_svcsock_accept_err(xprt, serv->sv_name, err); return NULL; } set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags); err = kernel_getpeername(newsock, sin); if (err < 0) { - net_warn_ratelimited("%s: peername failed (err %d)!\n", - serv->sv_name, -err); + trace_svcsock_getpeername_err(xprt, serv->sv_name, err); goto failed; /* aborted connection or whatever */ } slen = err; - /* Ideally, we would want to reject connections from unauthorized - * hosts here, but when we get encryption, the IP of the host won't - * tell us anything. For now just warn about unpriv connections. - */ - if (!svc_port_is_privileged(sin)) { - dprintk("%s: connect from unprivileged port: %s\n", - serv->sv_name, - __svc_print_addr(sin, buf, sizeof(buf))); - } - dprintk("%s: connect from %s\n", serv->sv_name, - __svc_print_addr(sin, buf, sizeof(buf))); - /* Reset the inherited callbacks before calling svc_setup_socket */ newsock->sk->sk_state_change = svsk->sk_ostate; newsock->sk->sk_data_ready = svsk->sk_odata; @@ -752,10 +789,8 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) svc_xprt_set_remote(&newsvsk->sk_xprt, sin, slen); err = kernel_getsockname(newsock, sin); slen = err; - if (unlikely(err < 0)) { - dprintk("svc_tcp_accept: kernel_getsockname error %d\n", -err); + if (unlikely(err < 0)) slen = offsetof(struct sockaddr, sa_data); - } svc_xprt_set_local(&newsvsk->sk_xprt, sin, slen); if (sock_is_loopback(newsock->sk)) @@ -772,13 +807,14 @@ failed: return NULL; } -static unsigned int svc_tcp_restore_pages(struct svc_sock *svsk, struct svc_rqst *rqstp) +static size_t svc_tcp_restore_pages(struct svc_sock *svsk, + struct svc_rqst *rqstp) { - unsigned int i, len, npages; + size_t len = svsk->sk_datalen; + unsigned int i, npages; - if (svsk->sk_datalen == 0) + if (!len) return 0; - len = svsk->sk_datalen; npages = (len + PAGE_SIZE - 1) >> PAGE_SHIFT; for (i = 0; i < npages; i++) { if (rqstp->rq_pages[i] != NULL) @@ -827,47 +863,45 @@ out: } /* - * Receive fragment record header. - * If we haven't gotten the record length yet, get the next four bytes. + * Receive fragment record header into sk_marker. */ -static int svc_tcp_recv_record(struct svc_sock *svsk, struct svc_rqst *rqstp) +static ssize_t svc_tcp_read_marker(struct svc_sock *svsk, + struct svc_rqst *rqstp) { - struct svc_serv *serv = svsk->sk_xprt.xpt_server; - unsigned int want; - int len; + ssize_t want, len; + /* If we haven't gotten the record length yet, |