diff options
37 files changed, 907 insertions, 781 deletions
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 81be07c1d3d1..0d6cb3fdc0e1 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -345,10 +345,10 @@ static int lockd_get(void) serv->sv_maxconn = nlm_max_connections; error = svc_set_num_threads(serv, NULL, 1); - /* The thread now holds the only reference */ - svc_put(serv); - if (error < 0) + if (error < 0) { + svc_destroy(&serv); return error; + } nlmsvc_serv = serv; register_inetaddr_notifier(&lockd_inetaddr_notifier); @@ -372,11 +372,9 @@ static void lockd_put(void) unregister_inet6addr_notifier(&lockd_inet6addr_notifier); #endif - svc_get(nlmsvc_serv); svc_set_num_threads(nlmsvc_serv, NULL, 0); - svc_put(nlmsvc_serv); timer_delete_sync(&nlmsvc_retry); - nlmsvc_serv = NULL; + svc_destroy(&nlmsvc_serv); dprintk("lockd_down: service destroyed\n"); } diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index 4ffa1f469e90..760d27dd7225 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -187,7 +187,7 @@ static struct svc_serv *nfs_callback_create_svc(int minorversion) * Check whether we're already up and running. */ if (cb_info->serv) - return svc_get(cb_info->serv); + return cb_info->serv; /* * Sanity check: if there's no task, @@ -245,9 +245,10 @@ int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt) cb_info->users++; err_net: - if (!cb_info->users) - cb_info->serv = NULL; - svc_put(serv); + if (!cb_info->users) { + svc_set_num_threads(cb_info->serv, NULL, 0); + svc_destroy(&cb_info->serv); + } err_create: mutex_unlock(&nfs_callback_mutex); return ret; @@ -271,11 +272,9 @@ void nfs_callback_down(int minorversion, struct net *net) nfs_callback_down_net(minorversion, serv, net); cb_info->users--; if (cb_info->users == 0) { - svc_get(serv); svc_set_num_threads(serv, NULL, 0); - svc_put(serv); dprintk("nfs_callback_down: service destroyed\n"); - cb_info->serv = NULL; + svc_destroy(&cb_info->serv); } mutex_unlock(&nfs_callback_mutex); } diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h index ccd4f245cae2..0279b78b5fc9 100644 --- a/fs/nfs/callback.h +++ b/fs/nfs/callback.h @@ -19,25 +19,6 @@ enum nfs4_callback_procnum { CB_COMPOUND = 1, }; -enum nfs4_callback_opnum { - OP_CB_GETATTR = 3, - OP_CB_RECALL = 4, -/* Callback operations new to NFSv4.1 */ - OP_CB_LAYOUTRECALL = 5, - OP_CB_NOTIFY = 6, - OP_CB_PUSH_DELEG = 7, - OP_CB_RECALL_ANY = 8, - OP_CB_RECALLABLE_OBJ_AVAIL = 9, - OP_CB_RECALL_SLOT = 10, - OP_CB_SEQUENCE = 11, - OP_CB_WANTS_CANCELLED = 12, - OP_CB_NOTIFY_LOCK = 13, - OP_CB_NOTIFY_DEVICEID = 14, -/* Callback operations new to NFSv4.2 */ - OP_CB_OFFLOAD = 15, - OP_CB_ILLEGAL = 10044, -}; - struct nfs4_slot; struct cb_process_state { __be32 drc_status; diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig index 43b88eaf0673..272ab8d5c4d7 100644 --- a/fs/nfsd/Kconfig +++ b/fs/nfsd/Kconfig @@ -158,3 +158,19 @@ config NFSD_V4_SECURITY_LABEL If you do not wish to enable fine-grained security labels SELinux or Smack policies on NFSv4 files, say N. + +config NFSD_LEGACY_CLIENT_TRACKING + bool "Support legacy NFSv4 client tracking methods (DEPRECATED)" + depends on NFSD_V4 + default n + help + The NFSv4 server needs to store a small amount of information on + stable storage in order to handle state recovery after reboot. Most + modern deployments upcall to a userland daemon for this (nfsdcld), + but older NFS servers may store information directly in a + recoverydir, or spawn a process directly using a usermodehelper + upcall. + + These legacy client tracking methods have proven to be probelmatic + and will be removed in the future. Say Y here if you need support + for them in the interim. diff --git a/fs/nfsd/filecache.c b/fs/nfsd/filecache.c index 6c2decfdeb4b..9cb7f0c33df5 100644 --- a/fs/nfsd/filecache.c +++ b/fs/nfsd/filecache.c @@ -717,7 +717,7 @@ nfsd_file_cache_init(void) return ret; ret = -ENOMEM; - nfsd_filecache_wq = alloc_workqueue("nfsd_filecache", 0, 0); + nfsd_filecache_wq = alloc_workqueue("nfsd_filecache", WQ_UNBOUND, 0); if (!nfsd_filecache_wq) goto out; diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h index ab303a8b77d5..74b4360779a1 100644 --- a/fs/nfsd/netns.h +++ b/fs/nfsd/netns.h @@ -123,14 +123,9 @@ struct nfsd_net { u32 clientid_counter; u32 clverifier_counter; - struct svc_serv *nfsd_serv; - /* When a listening socket is added to nfsd, keep_active is set - * and this justifies a reference on nfsd_serv. This stops - * nfsd_serv from being freed. When the number of threads is - * set, keep_active is cleared and the reference is dropped. So - * when the last thread exits, the service will be destroyed. - */ - int keep_active; + struct svc_info nfsd_info; +#define nfsd_serv nfsd_info.serv + /* * clientid and stateid data for construction of net unique COPY diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index 4039ffcf90ba..926c29879c6a 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -31,6 +31,7 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +#include <linux/nfs4.h> #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/xprt.h> #include <linux/sunrpc/svc_xprt.h> @@ -87,31 +88,6 @@ static void encode_bitmap4(struct xdr_stream *xdr, const __u32 *bitmap, WARN_ON_ONCE(xdr_stream_encode_uint32_array(xdr, bitmap, len) < 0); } -/* - * nfs_cb_opnum4 - * - * enum nfs_cb_opnum4 { - * OP_CB_GETATTR = 3, - * ... - * }; - */ -enum nfs_cb_opnum4 { - OP_CB_GETATTR = 3, - OP_CB_RECALL = 4, - OP_CB_LAYOUTRECALL = 5, - OP_CB_NOTIFY = 6, - OP_CB_PUSH_DELEG = 7, - OP_CB_RECALL_ANY = 8, - OP_CB_RECALLABLE_OBJ_AVAIL = 9, - OP_CB_RECALL_SLOT = 10, - OP_CB_SEQUENCE = 11, - OP_CB_WANTS_CANCELLED = 12, - OP_CB_NOTIFY_LOCK = 13, - OP_CB_NOTIFY_DEVICEID = 14, - OP_CB_OFFLOAD = 15, - OP_CB_ILLEGAL = 10044 -}; - static void encode_nfs_cb_opnum4(struct xdr_stream *xdr, enum nfs_cb_opnum4 op) { __be32 *p; diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c index 6f2d4aa4970d..14712fa08f76 100644 --- a/fs/nfsd/nfs4proc.c +++ b/fs/nfsd/nfs4proc.c @@ -970,8 +970,11 @@ nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, * To ensure proper ordering, we therefore turn off zero copy if * the client wants us to do more in this compound: */ - if (!nfsd4_last_compound_op(rqstp)) - clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); + if (!nfsd4_last_compound_op(rqstp)) { + struct nfsd4_compoundargs *argp = rqstp->rq_argp; + + argp->splice_ok = false; + } /* check stateid */ status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c index 3509e73abe1f..2c060e0b1604 100644 --- a/fs/nfsd/nfs4recover.c +++ b/fs/nfsd/nfs4recover.c @@ -66,6 +66,7 @@ struct nfsd4_client_tracking_ops { static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops; static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v2; +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING /* Globals */ static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; @@ -720,6 +721,7 @@ static const struct nfsd4_client_tracking_ops nfsd4_legacy_tracking_ops = { .version = 1, .msglen = 0, }; +#endif /* CONFIG_NFSD_LEGACY_CLIENT_TRACKING */ /* Globals */ #define NFSD_PIPE_DIR "nfsd" @@ -731,8 +733,10 @@ struct cld_net { spinlock_t cn_lock; struct list_head cn_list; unsigned int cn_xid; - bool cn_has_legacy; struct crypto_shash *cn_tfm; +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING + bool cn_has_legacy; +#endif }; struct cld_upcall { @@ -793,7 +797,6 @@ __cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg, uint8_t cmd, princhashlen; struct xdr_netobj name, princhash = { .len = 0, .data = NULL }; uint16_t namelen; - struct cld_net *cn = nn->cld_net; if (get_user(cmd, &cmsg->cm_cmd)) { dprintk("%s: error when copying cmd from userspace", __func__); @@ -833,11 +836,15 @@ __cld_pipe_inprogress_downcall(const struct cld_msg_v2 __user *cmsg, return PTR_ERR(name.data); name.len = namelen; } +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING if (name.len > 5 && memcmp(name.data, "hash:", 5) == 0) { + struct cld_net *cn = nn->cld_net; + name.len = name.len - 5; memmove(name.data, name.data + 5, name.len); cn->cn_has_legacy = true; } +#endif if (!nfs4_client_to_reclaim(name, princhash, nn)) { kfree(name.data); kfree(princhash.data); @@ -1010,7 +1017,9 @@ __nfsd4_init_cld_pipe(struct net *net) } cn->cn_pipe->dentry = dentry; +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING cn->cn_has_legacy = false; +#endif nn->cld_net = cn; return 0; @@ -1282,10 +1291,6 @@ nfsd4_cld_check(struct nfs4_client *clp) { struct nfs4_client_reclaim *crp; struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); - struct cld_net *cn = nn->cld_net; - int status; - char dname[HEXDIR_LEN]; - struct xdr_netobj name; /* did we already find that this client is stable? */ if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags)) @@ -1296,7 +1301,12 @@ nfsd4_cld_check(struct nfs4_client *clp) if (crp) goto found; - if (cn->cn_has_legacy) { +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING + if (nn->cld_net->cn_has_legacy) { + int status; + char dname[HEXDIR_LEN]; + struct xdr_netobj name; + status = nfs4_make_rec_clidname(dname, &clp->cl_name); if (status) return -ENOENT; @@ -1314,6 +1324,7 @@ nfsd4_cld_check(struct nfs4_client *clp) goto found; } +#endif return -ENOENT; found: crp->cr_clp = clp; @@ -1327,8 +1338,6 @@ nfsd4_cld_check_v2(struct nfs4_client *clp) struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); struct cld_net *cn = nn->cld_net; int status; - char dname[HEXDIR_LEN]; - struct xdr_netobj name; struct crypto_shash *tfm = cn->cn_tfm; struct xdr_netobj cksum; char *principal = NULL; @@ -1342,7 +1351,11 @@ nfsd4_cld_check_v2(struct nfs4_client *clp) if (crp) goto found; +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING if (cn->cn_has_legacy) { + struct xdr_netobj name; + char dname[HEXDIR_LEN]; + status = nfs4_make_rec_clidname(dname, &clp->cl_name); if (status) return -ENOENT; @@ -1360,6 +1373,7 @@ nfsd4_cld_check_v2(struct nfs4_client *clp) goto found; } +#endif return -ENOENT; found: if (crp->cr_princhash.len) { @@ -1663,6 +1677,7 @@ static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v2 = { .msglen = sizeof(struct cld_msg_v2), }; +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING /* upcall via usermodehelper */ static char cltrack_prog[PATH_MAX] = "/sbin/nfsdcltrack"; module_param_string(cltrack_prog, cltrack_prog, sizeof(cltrack_prog), @@ -2007,28 +2022,10 @@ static const struct nfsd4_client_tracking_ops nfsd4_umh_tracking_ops = { .msglen = 0, }; -int -nfsd4_client_tracking_init(struct net *net) +static inline int check_for_legacy_methods(int status, struct net *net) { - int status; - struct path path; struct nfsd_net *nn = net_generic(net, nfsd_net_id); - - /* just run the init if it the method is already decided */ - if (nn->client_tracking_ops) - goto do_init; - - /* First, try to use nfsdcld */ - nn->client_tracking_ops = &nfsd4_cld_tracking_ops; - status = nn->client_tracking_ops->init(net); - if (!status) - return status; - if (status != -ETIMEDOUT) { - nn->client_tracking_ops = &nfsd4_cld_tracking_ops_v0; - status = nn->client_tracking_ops->init(net); - if (!status) - return status; - } + struct path path; /* * Next, try the UMH upcall. @@ -2045,14 +2042,46 @@ nfsd4_client_tracking_init(struct net *net) nn->client_tracking_ops = &nfsd4_legacy_tracking_ops; status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path); if (!status) { - status = d_is_dir(path.dentry); + status = !d_is_dir(path.dentry); path_put(&path); - if (!status) { - status = -EINVAL; - goto out; - } + if (status) + return -ENOTDIR; + status = nn->client_tracking_ops->init(net); + } + return status; +} +#else +static inline int check_for_legacy_methods(int status, struct net *net) +{ + return status; +} +#endif /* CONFIG_LEGACY_NFSD_CLIENT_TRACKING */ + +int +nfsd4_client_tracking_init(struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + int status; + + /* just run the init if it the method is already decided */ + if (nn->client_tracking_ops) + goto do_init; + + /* First, try to use nfsdcld */ + nn->client_tracking_ops = &nfsd4_cld_tracking_ops; + status = nn->client_tracking_ops->init(net); + if (!status) + return status; + if (status != -ETIMEDOUT) { + nn->client_tracking_ops = &nfsd4_cld_tracking_ops_v0; + status = nn->client_tracking_ops->init(net); + if (!status) + return status; } + status = check_for_legacy_methods(status, net); + if (status) + goto out; do_init: status = nn->client_tracking_ops->init(net); out: diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index 3edbfa0233e6..2fa54cfd4882 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -6575,7 +6575,7 @@ unlock: spin_unlock(&nn->s2s_cp_lock); if (!state) return nfserr_bad_stateid; - if (!clp && state) + if (!clp) *cps = state; return 0; } diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c index b499fe9caa32..c719c475a068 100644 --- a/fs/nfsd/nfs4xdr.c +++ b/fs/nfsd/nfs4xdr.c @@ -2524,8 +2524,9 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp) svc_reserve(argp->rqstp, max_reply + readbytes); argp->rqstp->rq_cachetype = cachethis ? RC_REPLBUFF : RC_NOCACHE; + argp->splice_ok = nfsd_read_splice_ok(argp->rqstp); if (readcount > 1 || max_reply > PAGE_SIZE - auth_slack) - clear_bit(RQ_SPLICE_OK, &argp->rqstp->rq_flags); + argp->splice_ok = false; return true; } @@ -4375,12 +4376,13 @@ static __be32 nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, union nfsd4_op_u *u) { + struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp; struct nfsd4_read *read = &u->read; - bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags); - unsigned long maxcount; struct xdr_stream *xdr = resp->xdr; - struct file *file; int starting_len = xdr->buf->len; + bool splice_ok = argp->splice_ok; + unsigned long maxcount; + struct file *file; __be32 *p; if (nfserr) @@ -5201,9 +5203,10 @@ static __be32 nfsd4_encode_read_plus_data(struct nfsd4_compoundres *resp, struct nfsd4_read *read) { - bool splice_ok = test_bit(RQ_SPLICE_OK, &resp->rqstp->rq_flags); + struct nfsd4_compoundargs *argp = resp->rqstp->rq_argp; struct file *file = read->rd_nf->nf_file; struct xdr_stream *xdr = resp->xdr; + bool splice_ok = argp->splice_ok; unsigned long maxcount; __be32 nfserr, *p; diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c index d3273a396659..5c1a4a0aa605 100644 --- a/fs/nfsd/nfscache.c +++ b/fs/nfsd/nfscache.c @@ -364,8 +364,6 @@ nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc) if (freed > sc->nr_to_scan) break; } - - trace_nfsd_drc_gc(nn, freed); return freed; } @@ -508,7 +506,6 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp, unsigned int start, __wsum csum; struct nfsd_drc_bucket *b; int type = rqstp->rq_cachetype; - unsigned long freed; LIST_HEAD(dispose); int rtn = RC_DOIT; @@ -538,8 +535,7 @@ int nfsd_cache_lookup(struct svc_rqst *rqstp, unsigned int start, nfsd_prune_bucket_locked(nn, b, 3, &dispose); spin_unlock(&b->cache_lock); - freed = nfsd_cacherep_dispose(&dispose); - trace_nfsd_drc_gc(nn, freed); + nfsd_cacherep_dispose(&dispose); nfsd_stats_rc_misses_inc(); atomic_inc(&nn->num_drc_entries); diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 87fed75808ff..8e6dbe9e0b65 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -76,7 +76,9 @@ static ssize_t write_maxconn(struct file *file, char *buf, size_t size); #ifdef CONFIG_NFSD_V4 static ssize_t write_leasetime(struct file *file, char *buf, size_t size); static ssize_t write_gracetime(struct file *file, char *buf, size_t size); +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); +#endif static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); #endif @@ -93,7 +95,9 @@ static ssize_t (*const write_op[])(struct file *, char *, size_t) = { #ifdef CONFIG_NFSD_V4 [NFSD_Leasetime] = write_leasetime, [NFSD_Gracetime] = write_gracetime, +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING [NFSD_RecoveryDir] = write_recoverydir, +#endif [NFSD_V4EndGrace] = write_v4_end_grace, #endif }; @@ -179,7 +183,7 @@ static const struct file_operations pool_stats_operations = { .open = nfsd_pool_stats_open, .read = seq_read, .llseek = seq_lseek, - .release = nfsd_pool_stats_release, + .release = seq_release, }; DEFINE_SHOW_ATTRIBUTE(nfsd_reply_cache_stats); @@ -707,12 +711,9 @@ static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred serv = nn->nfsd_serv; err = svc_addsock(serv, net, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred); - if (err < 0 && !serv->sv_nrthreads && !nn->keep_active) - nfsd_last_thread(net); - else if (err >= 0 && !serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) - svc_get(serv); + if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks)) + nfsd_destroy_serv(net); - svc_put(serv); return err; } @@ -750,10 +751,6 @@ static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cr if (err < 0 && err != -EAFNOSUPPORT) goto out_close; - if (!serv->sv_nrthreads && !xchg(&nn->keep_active, 1)) - svc_get(serv); - - svc_put(serv); return 0; out_close: xprt = svc_find_xprt(serv, transport, net, PF_INET, port); @@ -762,10 +759,9 @@ out_close: svc_xprt_put(xprt); } out_err: - if (!serv->sv_nrthreads && !nn->keep_active) - nfsd_last_thread(net); + if (!serv->sv_nrthreads && list_empty(&nn->nfsd_serv->sv_permsocks)) + nfsd_destroy_serv(net); - svc_put(serv); return err; } @@ -1021,6 +1017,7 @@ static ssize_t write_gracetime(struct file *file, char *buf, size_t size) return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); } +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, struct nfsd_net *nn) { @@ -1081,6 +1078,7 @@ static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) mutex_unlock(&nfsd_mutex); return rv; } +#endif /* * write_v4_end_grace - release grace period for nfsd's v4.x lock manager diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h index 9ed0e08d16c2..304e9728b929 100644 --- a/fs/nfsd/nfsd.h +++ b/fs/nfsd/nfsd.h @@ -148,7 +148,7 @@ int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); void nfsd_reset_versions(struct nfsd_net *nn); int nfsd_create_serv(struct net *net); -void nfsd_last_thread(struct net *net); +void nfsd_destroy_serv(struct net *net); extern int nfsd_max_blksize; diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c index 7a2bc8e82a63..a667802e08e7 100644 --- a/fs/nfsd/nfssvc.c +++ b/fs/nfsd/nfssvc.c @@ -59,15 +59,6 @@ static __be32 nfsd_init_request(struct svc_rqst *, * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and some members * of the svc_serv struct such as ->sv_temp_socks and ->sv_permsocks. * - * If (out side the lock) nn->nfsd_serv is non-NULL, then it must point to a - * properly initialised 'struct svc_serv' with ->sv_nrthreads > 0 (unless - * nn->keep_active is set). That number of nfsd threads must - * exist and each must be listed in ->sp_all_threads in some entry of - * ->sv_pools[]. - * - * Each active thread holds a counted reference on nn->nfsd_serv, as does - * the nn->keep_active flag and various transient calls to svc_get(). - * * Finally, the nfsd_mutex also protects some of the global variables that are * accessed when nfsd starts and that are settable via the write_* routines in * nfsctl.c. In particular: @@ -359,13 +350,12 @@ static bool nfsd_needs_lockd(struct nfsd_net *nn) */ void nfsd_copy_write_verifier(__be32 verf[2], struct nfsd_net *nn) { - int seq = 0; + unsigned int seq; do { - read_seqbegin_or_lock(&nn->writeverf_lock, &seq); + seq = read_seqbegin(&nn->writeverf_lock); memcpy(verf, nn->writeverf, sizeof(nn->writeverf)); - } while (need_seqretry(&nn->writeverf_lock, seq)); - done_seqretry(&nn->writeverf_lock, seq); + } while (read_seqretry(&nn->writeverf_lock, seq)); } static void nfsd_reset_write_verifier_locked(struct nfsd_net *nn) @@ -542,7 +532,11 @@ static struct notifier_block nfsd_inet6addr_notifier = { /* Only used under nfsd_mutex, so this atomic may be overkill: */ static atomic_t nfsd_notifier_refcount = ATOMIC_INIT(0); -void nfsd_last_thread(struct net *net) +/** + * nfsd_destroy_serv - tear down NFSD's svc_serv for a namespace + * @net: network namespace the NFS service is associated with + */ +void nfsd_destroy_serv(struct net *net) { struct nfsd_net *nn = net_generic(net, nfsd_net_id); struct svc_serv *serv = nn->nfsd_serv; @@ -564,7 +558,7 @@ void nfsd_last_thread(struct net *net) /* * write_ports can create the server without actually starting * any threads--if we get shut down before any threads are - * started, then nfsd_last_thread will be run before any of this + * started, then nfsd_destroy_serv will be run before any of this * other initialization has been done except the rpcb information. */ svc_rpcb_cleanup(serv, net); @@ -573,6 +567,7 @@ void nfsd_last_thread(struct net *net) nfsd_shutdown_net(net); nfsd_export_flush(net); + svc_destroy(&serv); } void nfsd_reset_versions(struct nfsd_net *nn) @@ -647,11 +642,9 @@ void nfsd_shutdown_threads(struct net *net) return; } - svc_get(serv); /* Kill outstanding nfsd threads */ svc_set_num_threads(serv, NULL, 0); - nfsd_last_thread(net); - svc_put(serv); + nfsd_destroy_serv(net); mutex_unlock(&nfsd_mutex); } @@ -667,10 +660,9 @@ int nfsd_create_serv(struct net *net) struct svc_serv *serv; WARN_ON(!mutex_is_locked(&nfsd_mutex)); - if (nn->nfsd_serv) { - svc_get(nn->nfsd_serv); + if (nn->nfsd_serv) return 0; - } + if (nfsd_max_blksize == 0) nfsd_max_blksize = nfsd_get_default_max_blksize(); nfsd_reset_versions(nn); @@ -681,10 +673,11 @@ int nfsd_create_serv(struct net *net) serv->sv_maxconn = nn->max_connections; error = svc_bind(serv, net); if (error < 0) { - svc_put(serv); + svc_destroy(&serv); return error; } spin_lock(&nfsd_notifier_lock); + nn->nfsd_info.mutex = &nfsd_mutex; nn->nfsd_serv = serv; spin_unlock(&nfsd_notifier_lock); @@ -764,7 +757,6 @@ int nfsd_set_nrthreads(int n, int *nthreads, struct net *net) nthreads[0] = 1; /* apply the new numbers */ - svc_get(nn->nfsd_serv); for (i = 0; i < n; i++) { err = svc_set_num_threads(nn->nfsd_serv, &nn->nfsd_serv->sv_pools[i], @@ -772,7 +764,6 @@ int nfsd_set_nrthreads(int n, int *nthreads, struct net *net) if (err) break; } - svc_put(nn->nfsd_serv); return err; } @@ -814,13 +805,8 @@ nfsd_svc(int nrservs, struct net *net, const struct cred *cred) goto out_put; error = serv->sv_nrthreads; out_put: - /* Threads now hold service active */ - if (xchg(&nn->keep_active, 0)) - svc_put(serv); - if (serv->sv_nrthreads == 0) - nfsd_last_thread(net); - svc_put(serv); + nfsd_destroy_serv(net); out: mutex_unlock(&nfsd_mutex); return error; @@ -1083,28 +1069,7 @@ bool nfssvc_encode_voidres(struct svc_rqst *rqstp, struct xdr_stream *xdr) int nfsd_pool_stats_open(struct inode *inode, struct file *file) { - int ret; struct nfsd_net *nn = net_generic(inode->i_sb->s_fs_info, nfsd_net_id); - mutex_lock(&nfsd_mutex); - if (nn->nfsd_serv == NULL) { - mutex_unlock(&nfsd_mutex); - return -ENODEV; - } - svc_get(nn->nfsd_serv); - ret = svc_pool_stats_open(nn->nfsd_serv, file); - mutex_unlock(&nfsd_mutex); - return ret; -} - -int nfsd_pool_stats_release(struct inode *inode, struct file *file) -{ - struct seq_file *seq = file->private_data; - struct svc_serv *serv = seq->private; - int ret = seq_release(inode, file); - - mutex_lock(&nfsd_mutex); - svc_put(serv); - mutex_unlock(&nfsd_mutex); - return ret; + return svc_pool_stats_open(&nn->nfsd_info, file); } diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h index fbc0ccb40424..d1e8cf079b0f 100644 --- a/fs/nfsd/trace.h +++ b/fs/nfsd/trace.h @@ -1262,28 +1262,6 @@ TRACE_EVENT(nfsd_drc_mismatch, __entry->ingress) ); -TRACE_EVENT_CONDITION(nfsd_drc_gc, - TP_PROTO( - const struct nfsd_net *nn, - unsigned long freed - ), - TP_ARGS(nn, freed), - TP_CONDITION(freed > 0), - TP_STRUCT__entry( - __field(unsigned long long, boot_time) - __field(unsigned long, freed) - __field(int, total) - ), - TP_fast_assign( - __entry->boot_time = nn->boot_time; - __entry->freed = freed; - __entry->total = atomic_read(&nn->num_drc_entries); - ), - TP_printk("boot_time=%16llx total=%d freed=%lu", - __entry->boot_time, __entry->total, __entry->freed - ) -); - TRACE_EVENT(nfsd_cb_args, TP_PROTO( const struct nfs4_client *clp, diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c index 707ef21f275b..6e7e37192461 100644 --- a/fs/nfsd/vfs.c +++ b/fs/nfsd/vfs.c @@ -1211,6 +1211,30 @@ out_nfserr: } /** + * nfsd_read_splice_ok - check if spliced reading is supported + * @rqstp: RPC transaction context + * + * Return values: + * %true: nfsd_splice_read() may be used + * %false: nfsd_splice_read() must not be used + * + * NFS READ normally uses splice to send data in-place. However the + * data in cache can change after the reply's MIC is computed but + * before the RPC reply is sent. To prevent the client from + * rejecting the server-computed MIC in this somewhat rare case, do + * not use splice with the GSS integrity and privacy services. + */ +bool nfsd_read_splice_ok(struct svc_rqst *rqstp) +{ + switch (svc_auth_flavor(rqstp)) { + case RPC_AUTH_GSS_KRB5I: + case RPC_AUTH_GSS_KRB5P: + return false; + } + return true; +} + +/** * nfsd_read - Read data from a file * @rqstp: RPC transaction context * @fhp: file handle of file to be read @@ -1239,7 +1263,7 @@ __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, return err; file = nf->nf_file; - if (file->f_op->splice_read && test_bit(RQ_SPLICE_OK, &rqstp->rq_flags)) + if (file->f_op->splice_read && nfsd_read_splice_ok(rqstp)) err = nfsd_splice_read(rqstp, fhp, file, offset, count, eof); else err = nfsd_iter_read(rqstp, fhp, file, offset, count, 0, eof); @@ -2103,9 +2127,23 @@ static __be32 nfsd_buffered_readdir(struct file *file, struct svc_fh *fhp, return cdp->err; } -/* - * Read entries from a directory. - * The NFSv3/4 verifier we ignore for now. +/** + * nfsd_readdir - Read entries from a directory + * @rqstp: RPC transaction context + * @fhp: NFS file handle of directory to be read + * @offsetp: OUT: seek offset of final entry that was read + * @cdp: OUT: an eof error value + * @func: entry filler actor + * + * This implementation ignores the NFSv3/4 verifier cookie. + * + * NB: normal system calls hold file->f_pos_lock when calling + * ->iterate_shared and ->llseek, but nfsd_readdir() does not. + * Because the struct file acquired here is not visible to other + * threads, it's internal state does not need mutex protection. + * + * Returns nfs_ok on success, otherwise an nfsstat code is + * returned. */ __be32 nfsd_readdir(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t *offsetp, diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h index e3c29596f4df..702fbc4483bf 100644 --- a/fs/nfsd/vfs.h +++ b/fs/nfsd/vfs.h @@ -114,6 +114,7 @@ __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, loff_t offset, unsigned long *count, unsigned int base, u32 *eof); +bool nfsd_read_splice_ok(struct svc_rqst *rqstp); __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset, unsigned long *count, u32 *eof); diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h index 80e859dc84d8..415516c1b27e 100644 --- a/fs/nfsd/xdr4.h +++ b/fs/nfsd/xdr4.h @@ -840,6 +840,7 @@ struct nfsd4_compoundargs { u32 minorversion; u32 client_opcnt; u32 opcnt; + bool splice_ok; struct nfsd4_op *ops; struct nfsd4_op iops[8]; }; diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h index c11c4db34639..ef8d2d618d5b 100644 --- a/include/linux/nfs4.h +++ b/include/linux/nfs4.h @@ -869,4 +869,26 @@ enum { RCA4_TYPE_MASK_OTHER_LAYOUT_MAX = 15, }; +enum nfs_cb_opnum4 { + OP_CB_GETATTR = 3, + OP_CB_RECALL = 4, + + /* Callback operations new to NFSv4.1 */ + OP_CB_LAYOUTRECALL = 5, + OP_CB_NOTIFY = 6, + OP_CB_PUSH_DELEG = 7, + OP_CB_RECALL_ANY = 8, + OP_CB_RECALLABLE_OBJ_AVAIL = 9, + OP_CB_RECALL_SLOT = 10, + OP_CB_SEQUENCE = 11, + OP_CB_WANTS_CANCELLED = 12, + OP_CB_NOTIFY_LOCK = 13, + OP_CB_NOTIFY_DEVICEID = 14, + + /* Callback operations new to NFSv4.2 */ + OP_CB_OFFLOAD = 15, + + OP_CB_ILLEGAL = 10044, +}; + #endif diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h index b10f987509cc..8d7888234e9e 100644 --- a/include/linux/sunrpc/svc.h +++ b/include/linux/sunrpc/svc.h @@ -69,7 +69,6 @@ struct svc_serv { struct svc_program * sv_program; /* RPC program */ struct svc_stat * sv_stats; /* RPC statistics */ spinlock_t sv_lock; - struct kref sv_refcnt; unsigned int sv_nrthreads; /* # of server threads */ unsigned int sv_maxconn; /* max connections allowed or * '0' causing max to be based @@ -97,31 +96,13 @@ struct svc_serv { #endif /* CONFIG_SUNRPC_BACKCHANNEL */ }; -/** - * svc_get() - increment reference count on a SUNRPC serv - * @serv: the svc_serv to have count incremented - * - * Returns: the svc_serv that was passed in. - */ -static inline struct svc_serv *svc_get(struct svc_serv *serv) -{ - kref_get(&serv->sv_refcnt); - return serv; -} - -void svc_destroy(struct kref *); +/* This is used by pool_stats to find and lock an svc */ +struct svc_info { + struct svc_serv *serv; + struct mutex *mutex; +}; -/** - * svc_put - decrement reference count on a SUNRPC serv - * @serv: the svc_serv to have count decremented - * - * When the reference count reaches zero, svc_destroy() - * is called to clean up and free the serv. - */ -static inline void svc_put(struct svc_serv *serv) -{ - kref_put(&serv->sv_refcnt, svc_destroy); -} +void svc_destroy(struct svc_serv **svcp); /* * Maximum payload size supported by a kernel RPC server. @@ -260,8 +241,6 @@ enum { RQ_LOCAL, /* local request */ RQ_USEDEFERRAL, /* use deferral */ RQ_DROPME, /* drop current reply */ - RQ_SPLICE_OK, /* turned off in gss privacy to prevent - * encrypting page cache pages */ RQ_VICTIM, /* Have agreed to shut down */ RQ_DATA, /* request has data */ }; @@ -433,7 +412,7 @@ void svc_exit_thread(struct svc_rqst *); struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int, int (*threadfn)(void *data)); int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int); -int svc_pool_stats_open(struct svc_serv *serv, struct file *file); +int svc_pool_stats_open(struct svc_info *si, struct file *file); void svc_process(struct svc_rqst *rqstp); void svc_process_bc(struct rpc_rqst *req, struct svc_rqst *rqstp); int svc_register(const struct svc_serv *, struct net *, const int, diff --git a/include/linux/sunrpc/svc_rdma.h b/include/linux/sunrpc/svc_rdma.h index a5ee0af2a310..e7595ae62fe2 100644 --- a/include/linux/sunrpc/svc_rdma.h +++ b/include/linux/sunrpc/svc_rdma.h @@ -65,6 +65,7 @@ extern unsigned int svcrdma_ord; extern unsigned int svcrdma_max_requests; extern unsigned int svcrdma_max_bc_requests; extern unsigned int svcrdma_max_req_size; +extern struct workqueue_struct *svcrdma_wq; extern struct percpu_counter svcrdma_stat_read; extern struct percpu_counter svcrdma_stat_recv; @@ -97,6 +98,7 @@ struct svcxprt_rdma { u32 sc_pending_recvs; u32 sc_recv_batch; struct list_head sc_rq_dto_q; + struct list_head sc_read_complete_q; spinlock_t sc_rq_dto_lock; struct ib_qp *sc_qp; struct ib_cq *sc_rq_cq; @@ -115,6 +117,13 @@ struct svcxprt_rdma { /* sc_flags */ #define RDMAXPRT_CONN_PENDING 3 +static inline struct svcxprt_rdma *svc_rdma_rqst_rdma(struct svc_rqst *rqstp) +{ + struct svc_xprt *xprt = rqstp->rq_xprt; + + return container_of(xprt, struct svcxprt_rdma, sc_xprt); +} + /* * Default connection parameters */ @@ -126,6 +135,43 @@ enum { #define RPCSVC_MAXPAYLOAD_RDMA RPCSVC_MAXPAYLOAD +/** + * svc_rdma_send_cid_init - Initialize a Receive Queue completion ID + * @rdma: controlling transport + * @cid: completion ID to initialize + */ +static inline void svc_rdma_recv_cid_init(struct svcxprt_rdma *rdma, + struct rpc_rdma_cid *cid) +{ + cid->ci_queue_id = rdma->sc_rq_cq->res.id; + cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids); +} + +/** + * svc_rdma_send_cid_init - Initialize a Send Queue completion ID + * @rdma: controlling transport + * @cid: completion ID to initialize + */ +static inline void svc_rdma_send_cid_init(struct svcxprt_rdma *rdma, + struct rpc_rdma_cid *cid) +{ + cid->ci_queue_id = rdma->sc_sq_cq->res.id; + cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids); +} + +/* + * A chunk context tracks all I/O for moving one Read or Write + * chunk. This is a set of rdma_rw's that handle data movement + * for all segments of one chunk. + */ +struct svc_rdma_chunk_ctxt { + struct rpc_rdma_cid cc_cid; + struct ib_cqe cc_cqe; + struct list_head cc_rwctxts; + ktime_t cc_posttime; + int cc_sqecount; +}; + struct svc_rdma_recv_ctxt { struct llist_node rc_node; struct list_head rc_list; @@ -136,22 +182,33 @@ struct svc_rdma_recv_ctxt { void *rc_recv_buf; struct xdr_stream rc_stream; u32 rc_byte_len; - unsigned int rc_page_count; u32 rc_inv_rkey; __be32 rc_msgtype; + /* State for pulling a Read chunk */ + unsigned int rc_pageoff; + unsigned int rc_curpage; + unsigned int rc_readbytes; + struct xdr_buf rc_saved_arg; + struct svc_rdma_chunk_ctxt rc_cc; + struct svc_rdma_pcl rc_call_pcl; struct svc_rdma_pcl rc_read_pcl; struct svc_rdma_chunk *rc_cur_result_payload; struct svc_rdma_pcl rc_write_pcl; struct svc_rdma_pcl rc_reply_pcl; + + unsigned int rc_page_count; + struct page *rc_pages[RPCSVC_MAXPAGES]; }; struct svc_rdma_send_ctxt { struct llist_node sc_node; struct rpc_rdma_cid sc_cid; + struct work_struct sc_work; + struct svcxprt_rdma *sc_rdma; struct ib_send_wr sc_send_wr; struct ib_cqe sc_cqe; struct xdr_buf sc_hdrbuf; @@ -180,6 +237,11 @@ extern int svc_rdma_recvfrom(struct svc_rqst *); /* svc_rdma_rw.c */ extern void svc_rdma_destroy_rw_ctxts(struct svcxprt_rdma *rdma); +extern void svc_rdma_cc_init(struct svcxprt_rdma *rdma, + struct svc_rdma_chunk_ctxt *cc); +extern void svc_rdma_cc_release(struct svcxprt_rdma *rdma, + struct svc_rdma_chunk_ctxt *cc, + enum dma_data_direction dir); extern int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma, const struct svc_rdma_chunk *chunk, const struct xdr_buf *xdr); @@ -200,7 +262,8 @@ extern int svc_rdma_send(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *ctxt); extern int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *sctxt, - const struct svc_rdma_recv_ctxt *rctxt, + const struct svc_rdma_pcl *write_pcl, + const struct svc_rdma_pcl *reply_pcl, const struct xdr_buf *xdr); extern void svc_rdma_send_error_msg(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *sctxt, diff --git a/include/linux/sunrpc/svcauth.h b/include/linux/sunrpc/svcauth.h index 6f90203edbf8..61c455f1e1f5 100644 --- a/include/linux/sunrpc/svcauth.h +++ b/include/linux/sunrpc/svcauth.h @@ -131,8 +131,11 @@ enum svc_auth_status { * This call releases a domain. * * set_client() - * Givens a pending request (struct svc_rqst), finds and assigns + * Given a pending request (struct svc_rqst), finds and assigns * an appropriate 'auth_domain' as the client. + * + * pseudoflavor() + * Returns RPC_AUTH pseudoflavor in use by @rqstp. */ struct auth_ops { char * name; @@ -143,11 +146,13 @@ struct auth_ops { int (*release)(struct svc_rqst *rqstp); void (*domain_release)(struct auth_domain *dom); enum svc_auth_status (*set_client)(struct svc_rqst *rqstp); + rpc_authflavor_t (*pseudoflavor)(struct svc_rqst *rqstp); }; struct svc_xprt; extern enum svc_auth_status svc_authenticate(struct svc_rqst *rqstp); +extern rpc_authflavor_t svc_auth_flavor(struct svc_rqst *rqstp); extern int svc_authorise(struct svc_rqst *rqstp); extern enum svc_auth_status svc_set_client(struct svc_rqst *rqstp); extern int svc_auth_register(rpc_authflavor_t flavor, struct auth_ops *aops); diff --git a/include/trace/events/rpcrdma.h b/include/trace/events/rpcrdma.h index 718df1d9b834..110c1475c527 100644 --- a/include/trace/events/rpcrdma.h +++ b/include/trace/events/rpcrdma.h @@ -22,47 +22,37 @@ ** Event classes **/ -DECLARE_EVENT_CLASS(rpcrdma_completion_class, +DECLARE_EVENT_CLASS(rpcrdma_simple_cid_class, TP_PROTO( - const struct ib_wc *wc, const struct rpc_rdma_cid *cid ), - TP_ARGS(wc, cid), + TP_ARGS(cid), TP_STRUCT__entry( __field(u32, cq_id) __field(int, completion_id) - __field(unsigned long, status) - __field(unsigned int, vendor_err) ), TP_fast_assign( __entry->cq_id = cid->ci_queue_id; __entry->completion_id = cid->ci_completion_id; - __entry->status = wc->status; - if (wc->status) - __entry->vendor_err = wc->vendor_err; - else - __entry->vendor_err = 0; ), - TP_printk("cq.id=%u cid=%d status=%s (%lu/0x%x)", - __entry->cq_id, __entry->completion_id, - rdma_show_wc_status(__entry->status), - __entry->status, __entry->vendor_err + TP_printk("cq.id=%d cid=%d", + __entry->cq_id, __entry->completion_id ) ); -#define DEFINE_COMPLETION_EVENT(name) \ - DEFINE_EVENT(rpcrdma_completion_class, name, \ +#define DEFINE_SIMPLE_CID_EVENT(name) \ + DEFINE_EVENT(rpcrdma_simple_cid_class, name, \ TP_PROTO( \ - const struct ib_wc *wc, \ const struct rpc_rdma_cid *cid \ ), \ - TP_ARGS(wc, cid)) + TP_ARGS(cid) \ + ) -DECLARE_EVENT_CLASS(rpcrdma_send_completion_class, +DECLARE_EVENT_CLASS(rpcrdma_completion_class, TP_PROTO( const struct ib_wc *wc, const struct rpc_rdma_cid *cid @@ -73,20 +63,29 @@ DECLARE_EVENT_CLASS(rpcrdma_send_completion_class, TP_STRUCT__entry( __field(u32, cq_id) __field(int, completion_id) + __field(unsigned long, status) + __field(unsigned int, vendor_err) ), TP_fast_assign( __entry->cq_id = cid->ci_queue_id; __entry->completion_id = cid->ci_completion_id; + __entry->status = wc->status; + if (wc->status) + __entry->vendor_err = wc->vendor_err; + else + __entry->vendor_err = 0; ), - TP_printk("cq.id=%u cid=%d", - __entry->cq_id, __entry->completion_id + TP_printk("cq.id=%u cid=%d status=%s (%lu/0x%x)", + __entry->cq_id, __entry->completion_id, + rdma_show_wc_status(__entry->status), + __entry->status, __entry->vendor_err ) ); -#define DEFINE_SEND_COMPLETION_EVENT(name) \ - DEFINE_EVENT(rpcrdma_send_completion_class, name, \ +#define DEFINE_COMPLETION_EVENT(name) \ + DEFINE_EVENT(rpcrdma_completion_class, name, \ TP_PROTO( \ const struct ib_wc *wc, \ const struct rpc_rdma_cid *cid \ @@ -978,27 +977,7 @@ TRACE_EVENT(xprtrdma_post_send_err, ) ); -TRACE_EVENT(xprtrdma_post_recv, - TP_PROTO( - const struct rpcrdma_rep *rep - ), - - TP_ARGS(rep), - - TP_STRUCT__entry( - __field(u32, cq_id) - __field(int, completion_id) - ), - - TP_fast_assign( - __entry->cq_id = rep->rr_cid.ci_queue_id; - __entry->completion_id = rep->rr_cid.ci_completion_id; - ), - - TP_printk("cq.id=%d cid=%d", - __entry->cq_id, __entry->completion_id - ) -); +DEFINE_SIMPLE_CID_EVENT(xprtrdma_post_recv); TRACE_EVENT(xprtrdma_post_recvs, TP_PROTO( @@ -1783,29 +1762,29 @@ DEFINE_ERROR_EVENT(chunk); DECLARE_EVENT_CLASS(svcrdma_dma_map_class, TP_PROTO( - const struct svcxprt_rdma *rdma, + const struct rpc_rdma_cid *cid, u64 dma_addr, u32 length ), - TP_ARGS(rdma, dma_addr, length), + TP_ARGS(cid, dma_addr, length), TP_STRUCT__entry( + __field(u32, cq_id) + __field(int, completion_id) __field(u64, dma_addr) __field(u32, length) - __string(device, rdma->sc_cm_id->device->name) - __string(addr, rdma->sc_xprt.xpt_remotebuf) ), TP_fast_assign( + __entry->cq_id = cid->ci_queue_id; + __entry->completion_id = cid->ci_completion_id; __entry->dma_addr = dma_addr; __entry->length = length; - __assign_str(device, rdma->sc_cm_id->device->name); - __assign_str(addr, rdma->sc_xprt.xpt_remotebuf); ), - TP_printk("addr=%s device=%s dma_addr=%llu length=%u", - __get_str(addr), __get_str(device), + TP_printk("cq.id=%u cid=%d dma_addr=%llu length=%u", + __entry->cq_id, __entry->completion_id, __entry->dma_addr, __entry->length ) ); @@ -1813,11 +1792,12 @@ DECLARE_EVENT_CLASS(svcrdma_dma_map_class, #define DEFINE_SVC_DMA_EVENT(name) \ DEFINE_EVENT(svcrdma_dma_map_class, svcrdma_##name, \ TP_PROTO( \ - const struct svcxprt_rdma *rdma,\ + const struct rpc_rdma_cid *cid, \ u64 dma_addr, \ u32 length \ ), \ - TP_ARGS(rdma, dma_addr, length)) + TP_ARGS(cid, dma_addr, length) \ + ) DEFINE_SVC_DMA_EVENT(dma_map_page); DEFINE_SVC_DMA_EVENT(dma_map_err); @@ -1826,33 +1806,37 @@ DEFINE_SVC_DMA_EVENT(dma_unmap_page); TRACE_EVENT(svcrdma_dma_map_rw_err, TP_PROTO( const struct svcxprt_rdma *rdma, + u64 offset, + u32 handle, unsigned int nents, int status ), - TP_ARGS(rdma, nents, status), + TP_ARGS(rdma, offset, handle, nents, status), TP_STRUCT__entry( - __field(int, status) + __field(u32, cq_id) + __field(u32, handle) + __field(u64, offset) __field(unsigned int, nents) - __string(device, rdma->sc_cm_id->device->name) - __string(addr, rdma->sc_xprt.xpt_remotebuf) + __field(int, status) ), TP_fast_assign( - __entry->status = status; + __entry->cq_id = rdma->sc_sq_cq->res.id; + __entry->handle = handle; + __entry->offset = offset; __entry->nents = nents; - __assign_str(device, rdma->sc_cm_id->device->name); - __assign_str(addr, rdma->sc_xprt.xpt_remotebuf); + __entry->status = status; ), - TP_printk("addr=%s device=%s nents=%u status=%d", - __get_str(addr), __get_str(device), __entry->nents, - __entry->status + TP_printk("cq.id=%u 0x%016llx:0x%08x nents=%u status=%d", + __entry->cq_id, (unsigned long long)__entry->offset, + __entry->handle, __entry->nents, __entry->status ) ); -TRACE_EVENT(svcrdma_no_rwctx_err, +TRACE_EVENT(svcrdma_rwctx_empty, TP_PROTO( const struct svcxprt_rdma *rdma, unsigned int num_sges @@ -1861,79 +1845,75 @@ TRACE_EVENT(svcrdma_no_rwctx_err, TP_ARGS(rdma, num_sges), TP_STRUCT__entry( + __field(u32, cq_id) __field(unsigned int, num_sges) - __string(device, rdma->sc_cm_id->device->name) - __string(addr, rdma->sc_xprt.xpt_remotebuf) ), TP_fast_assign( + __entry->cq_id = rdma->sc_sq_cq->res.id; __entry->num_sges = num_sges; - __assign_str(device, rdma->sc_cm_id->device->name); - __assign_str(addr, rdma->sc_xprt.xpt_remotebuf); ), - TP_printk("addr=%s device=%s num_sges=%d", - __get_str(addr), __get_str(device), __entry->num_sges + TP_printk("cq.id=%u num_sges=%d", + __entry->cq_id, __entry->num_sges ) ); TRACE_EVENT(svcrdma_page_overrun_err, TP_PROTO( - const struct svcxprt_rdma *rdma, - const struct svc_rqst *rqst, + const struct rpc_rdma_cid *cid, unsigned int pageno ), - TP_ARGS(rdma, rqst, pageno), + TP_ARGS(cid, pageno), TP_STRUCT__entry( + __field(u32, cq_id) + __field(int, completion_id) __field(unsigned int, pageno) - __field(u32, xid) - __string(device, rdma->sc_cm_id->device->name) - __string(addr, rdma->sc_xprt.xpt_remotebuf) ), TP_fast_assign( + __entry->cq_id = cid->ci_queue_id; + __entry->completion_id = cid->ci_completion_id; __entry->pageno = pageno; - __entry->xid = __be32_to_cpu(rqst->rq_xid); - __assign_str(device, rdma->sc_cm_id->device->name); - __assign_str(addr, rdma->sc_xprt.xpt_remotebuf); ), - TP_printk("addr=%s device=%s xid=0x%08x pageno=%u", __get_str(addr), - __get_str(device), __entry->xid, __entry->pageno + TP_printk("cq.id=%u cid=%d pageno=%u", + __entry->cq_id, __entry->completion_id, + __entry->pageno ) ); TRACE_EVENT(svcrdma_small_wrch_err, TP_PROTO( - const struct svcxprt_rdma *rdma, + const struct rpc_rdma_cid *cid, unsigned int remaining, unsigned int seg_no, unsigned int num_segs ), - TP_ARGS(rdma, remaining, seg_no, num_segs), + TP_ARGS(cid, remaining, seg_no, num_segs), TP_STRUCT__entry( + __field(u32, cq_id) + __field(int, completion_id) __field(unsigned int, remaining) __field(unsigned int, seg_no) __field(unsigned int, num_segs) - __string(device, rdma->sc_cm_id->device->name) - __string(addr, rdma->sc_xprt.xpt_remotebuf) ), TP_fast_assign( + __entry->cq_id = cid->ci_queue_id; + __entry->completion_id = cid->ci_completion_id; __entry->remaining = remaining; __entry->seg_no = seg_no; __entry->num_segs = num_segs; - __assign_str(device, rdma->sc_cm_id->device->name); - __assign_str(addr, rdma->sc_xprt.xpt_remotebuf); ), - TP_printk("addr=%s device=%s remaining=%u seg_no=%u num_segs=%u", - __get_str(addr), __get_str(device), __entry->remaining, - __entry->seg_no, __entry->num_segs + TP_printk("cq.id=%u cid=%d remaining=%u seg_no=%u num_segs=%u", + __entry->cq_id, __entry->completion_id, + __entry->remaining, __entry->seg_no, __entry->num_segs ) ); @@ -2020,31 +2000,11 @@ TRACE_EVENT(svcrdma_post_send, ) ); -DEFINE_SEND_COMPLETION_EVENT(svcrdma_wc_send); +DEFINE_SIMPLE_CID_EVENT(svcrdma_wc_send); DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_send_flush); DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_send_err); -TRACE_EVENT(svcrdma_post_recv, - TP_PROTO( - const struct svc_rdma_recv_ctxt *ctxt - ), - - TP_ARGS(ctxt), - - TP_STRUCT__entry( - __field(u32, cq_id) - __field(int, completion_id) - ), - - TP_fast_assign( - __entry->cq_id = ctxt->rc_cid.ci_queue_id; - __entry->completion_id = ctxt->rc_cid.ci_completion_id; - ), - - TP_printk("cq.id=%d cid=%d", - __entry->cq_id, __entry->completion_id - ) -); +DEFINE_SIMPLE_CID_EVENT(svcrdma_post_recv); DEFINE_RECEIVE_SUCCESS_EVENT(svcrdma_wc_recv); DEFINE_RECEIVE_FLUSH_EVENT(svcrdma_wc_recv_flush); @@ -2152,8 +2112,9 @@ TRACE_EVENT(svcrdma_wc_read, DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_read_flush); DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_read_err); +DEFINE_SIMPLE_CID_EVENT(svcrdma_read_finished); -DEFINE_SEND_COMPLETION_EVENT(svcrdma_wc_write); +DEFINE_SIMPLE_CID_EVENT(svcrdma_wc_write); DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_write_flush); DEFINE_SEND_FLUSH_EVENT(svcrdma_wc_write_err); @@ -2184,65 +2145,74 @@ TRACE_EVENT(svcrdma_qp_error, ) ); -DECLARE_EVENT_CLASS(svcrdma_sendqueue_event, +DECLARE_EVENT_CLASS(svcrdma_sendqueue_class, TP_PROTO( - const struct svcxprt_rdma *rdma + const struct svcxprt_rdma *rdma, + const struct rpc_rdma_cid *cid ), - TP_ARGS(rdma), + TP_ARGS(rdma, cid), TP_STRUCT__entry( + __field(u32, cq_id) + __field(int, completion_id) __field(int, avail) __field(int, depth) - __string(addr, rdma->sc_xprt.xpt_remotebuf) ), TP_fast_assign( + __entry->cq_id = cid->ci_queue_id; + __entry->completion_id = cid->ci_completion_id; __entry->avail = atomic_read(&rdma->sc_sq_avail); __entry->depth = rdma->sc_sq_depth; - __assign_str(addr, rdma->sc_xprt.xpt_remotebuf); ), - TP_printk("addr=%s sc_sq_avail=%d/%d", - __get_str(addr), __entry->avail, __entry->depth + TP_printk("cq.id=%u cid=%d sc_sq_avail=%d/%d", + __entry->cq_id, __entry->completion_id, + __entry->avail, __entry->depth ) ); #define DEFINE_SQ_EVENT(name) \ - DEFINE_EVENT(svcrdma_sendqueue_event, svcrdma_sq_##name,\ - TP_PROTO( \ - const struct svcxprt_rdma *rdma \ - ), \ - TP_ARGS(rdma)) + DEFINE_EVENT(svcrdma_sendqueue_class, name, \ + TP_PROTO( \ + const struct svcxprt_rdma *rdma, \ + const struct rpc_rdma_cid *cid \ + ), \ + TP_ARGS(rdma, cid) \ + ) -DEFINE_SQ_EVENT(full); -DEFINE_SQ_EVENT(retry); +DEFINE_SQ_EVENT(svcrdma_sq_full); +DEFINE_SQ_EVENT(svcrdma_sq_retry); TRACE_EVENT(svcrdma_sq_post_err, TP_PROTO( const struct svcxprt_rdma *rdma, + const struct rpc_rdma_cid *cid, int status ), - TP_ARGS(rdma, status), + TP_ARGS(rdma, cid, status), TP_STRUCT__entry( + __field(u32, cq_id) + __field(int, completion_id) __field(int, avail) __field(int, depth) __field(int, status) - __string(addr, rdma->sc_xprt.xpt_remotebuf) ), TP_fast_assign( + __entry->cq_id = cid->ci_queue_id; + __entry->completion_id = cid->ci_completion_id; __entry->avail = atomic_read(&rdma->sc_sq_avail); __entry->depth = rdma->sc_sq_depth; __entry->status = status; - __assign_str(addr, rdma->sc_xprt.xpt_remotebuf); ), - TP_printk("addr=%s sc_sq_avail=%d/%d status=%d", - __get_str(addr), __entry->avail, __entry->depth, - __entry->status + TP_printk("cq.id=%u cid=%d sc_sq_avail=%d/%d status=%d", + __entry->cq_id, __entry->completion_id, + __entry->avail, __entry->depth, __entry->status ) ); diff --git a/include/trace/events/sunrpc.h b/include/trace/events/sunrpc.h index 337c90787fb1..cdd3a45e6003 100644 --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -1675,7 +1675,6 @@ DEFINE_SVCXDRBUF_EVENT(sendto); svc_rqst_flag(LOCAL) \ svc_rqst_flag(USEDEFERRAL) \ svc_rqst_flag(DROPME) \ - svc_rqst_flag(SPLICE_OK) \ svc_rqst_flag(VICTIM) \ svc_rqst_flag_end(DATA) diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c index 18734e70c5dd..24de94184700 100644 --- a/net/sunrpc/auth_gss/svcauth_gss.c +++ b/net/sunrpc/auth_gss/svcauth_gss.c @@ -866,14 +866,6 @@ svcauth_gss_unwrap_integ(struct svc_rqst *rqstp, u32 seq, struct gss_ctx *ctx) struct xdr_buf databody_integ; struct xdr_netobj checksum; - /* NFS READ normally uses splice to send data in-place. However - * the data in cache can change after the reply's MIC is computed - * but before the RPC reply is sent. To prevent the client from - * rejecting the server-computed MIC in this somewhat rare case, - * do not use splice with the GSS integrity service. - */ - clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); - /* Did we already verify the signature on the original pass through? */ if (rqstp->rq_deferred) return 0; @@ -948,8 +940,6 @@ svcauth_gss_unwrap_priv(struct svc_rqst *rqstp, u32 seq, struct gss_ctx *ctx) struct xdr_buf *buf = xdr->buf; unsigned int saved_len; - clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); - if (xdr_stream_decode_u32(xdr, &len) < 0) goto unwrap_failed; if (rqstp->rq_deferred) { @@ -2014,6 +2004,11 @@ svcauth_gss_domain_release(struct auth_domain *dom) call_rcu(&dom->rcu_head, svcauth_gss_domain_release_rcu); } +static rpc_authflavor_t svcauth_gss_pseudoflavor(struct svc_rqst *rqstp) +{ + return svcauth_gss_flavor(rqstp->rq_gssclient); +} + static struct auth_ops svcauthops_gss = { .name = "rpcsec_gss", .owner = THIS_MODULE, @@ -2022,6 +2017,7 @@ static struct auth_ops svcauthops_gss = { .release = svcauth_gss_release, .domain_release = svcauth_gss_domain_release, .set_client = svcauth_gss_set_client, + .pseudoflavor = svcauth_gss_pseudoflavor, }; static int rsi_cache_create_net(struct net *net) diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index 3f2ea7a0496f..eb5856e1351d 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -463,7 +463,6 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools, return NULL; serv->sv_name = prog->pg_name; serv->sv_program = prog; - kref_init(&serv->sv_refcnt); serv->sv_stats = prog->pg_stats; if (bufsize > RPCSVC_MAXPAYLOAD) bufsize = RPCSVC_MAXPAYLOAD; @@ -564,11 +563,13 @@ EXPORT_SYMBOL_GPL(svc_create_pooled); * protect sv_permsocks and sv_tempsocks. */ void -svc_destroy(struct kref *ref) +svc_destroy(struct svc_serv **servp) { - struct svc_serv *serv = container_of(ref, struct svc_serv, sv_refcnt); + struct svc_serv *serv = *servp; unsigned int i; + *servp = NULL; + dprintk("svc: svc_destroy(%s)\n", serv->sv_program->pg_name); timer_shutdown_sync(&serv->sv_temptimer); @@ -675,7 +676,6 @@ svc_prepare_thread(struct svc_serv *serv, struct svc_pool *pool, int node) if (!rqstp) return ERR_PTR(-ENOMEM); - svc_get(serv); spin_lock_bh(&serv->sv_lock); serv->sv_nrthreads += 1; spin_unlock_bh(&serv->sv_lock); @@ -935,11 +935,6 @@ svc_exit_thread(struct svc_rqst *rqstp) svc_rqst_free(rqstp); - svc_put(serv); - /* That svc_put() cannot be the last, because the thread - * waiting for SP_VICTIM_REMAINS to clear must hold - * a reference. So it is still safe to access pool. - */ clear_and_wake_up_bit(SP_VICTIM_REMAINS, &pool->sp_flags); } EXPORT_SYMBOL_GPL(svc_exit_thread); @@ -1305,8 +1300,6 @@ svc_process_common(struct svc_rqst *rqstp) int rc; __be32 *p; - /* Will be turned off by GSS integrity and privacy services */ - set_bit(RQ_SPLICE_OK, &rqstp->rq_flags); /* Will be turned off only when NFSv4 Sessions are used */ set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); clear_bit(RQ_DROPME, &rqstp->rq_flags); diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index 1b71055fc391..b4a85a227bd7 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -1362,29 +1362,36 @@ int svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen) } EXPORT_SYMBOL_GPL(svc_xprt_names); - /*----------------------------------------------------------------------------*/ static void *svc_pool_stats_start(struct seq_file *m, loff_t *pos) { unsigned int pidx = (unsigned int)*pos; - struct svc_serv *serv = m->private; + struct svc_info *si = m->private; dprintk("svc_pool_stats_start, *pidx=%u\n", pidx); + mutex_lock(si->mutex); + if (!pidx) return SEQ_START_TOKEN; - return (pidx > serv->sv_nrpools ? NULL : &serv->sv_pools[pidx-1]); + if (!si->serv) + return NULL; + return pidx > si->serv->sv_nrpools ? NULL + : &si->serv->sv_pools[pidx - 1]; } static void *svc_pool_stats_next(struct seq_file *m, void *p, loff_t *pos) { struct svc_pool *pool = p; - struct svc_serv *serv = m->private; + struct svc_info *si = m->private; + struct svc_serv *serv = si->serv; dprintk("svc_pool_stats_next, *pos=%llu\n", *pos); - if (p == SEQ_START_TOKEN) { + if (!serv) { + pool = NULL; + } else if (p == SEQ_START_TOKEN) { pool = &serv->sv_pools[0]; } else { unsigned int pidx = (pool - &serv->sv_pools[0]); @@ -1399,6 +1406,9 @@ static void *svc_pool_stats_next(struct seq_file *m, void *p, loff_t *pos) static void svc_pool_stats_stop(struct seq_file *m, void *p) { + struct svc_info *si = m->private; + + mutex_unlock(si->mutex); } static int svc_pool_stats_show(struct seq_file *m, void *p) @@ -1426,14 +1436,18 @@ static const struct seq_operations svc_pool_stats_seq_ops = { .show = svc_pool_stats_show, }; -int svc_pool_stats_open(struct svc_serv *serv, struct file *file) +int svc_pool_stats_open(struct svc_info *info, struct file *file) { + struct seq_file *seq; int err; err = seq_open(file, &svc_pool_stats_seq_ops); - if (!err) - ((struct seq_file *) file->private_data)->private = serv; - return err; + if (err) + return err; + seq = file->private_data; + seq->private = info; + + return 0; } EXPORT_SYMBOL(svc_pool_stats_open); diff --git a/net/sunrpc/svcauth.c b/net/sunrpc/svcauth.c index aa4429d0b810..1619211f0960 100644 --- a/net/sunrpc/svcauth.c +++ b/net/sunrpc/svcauth.c @@ -160,6 +160,22 @@ svc_auth_unregister(rpc_authflavor_t flavor) } EXPORT_SYMBOL_GPL(svc_auth_unregister); +/** + * svc_auth_flavor - return RPC transaction's RPC_AUTH flavor + * @rqstp: RPC transaction context + * + * Returns an RPC flavor or GSS pseudoflavor. + */ +rpc_authflavor_t svc_auth_flavor(struct svc_rqst *rqstp) +{ + struct auth_ops *aops = rqstp->rq_authop; + + if (!aops->pseudoflavor) + return aops->flavour; + return aops->pseudoflavor(rqstp); +} +EXPORT_SYMBOL_GPL(svc_auth_flavor); + /************************************************** * 'auth_domains' are stored in a hash table indexed by name. * When the last reference to an 'auth_domain' is dropped, diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 998687421fa6..bfb2f78523a8 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -1049,18 +1049,14 @@ static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp) struct rpc_rqst *req = NULL; struct kvec *src, *dst; __be32 *p = (__be32 *)rqstp->rq_arg.head[0].iov_base; - __be32 xid; - __be32 calldir; - - xid = *p++; - calldir = *p; + __be32 xid = *p; if (!bc_xprt) return -EAGAIN; spin_lock(&bc_xprt->queue_lock); req = xprt_lookup_rqst(bc_xprt, xid); if (!req) - goto unlock_notfound; + goto unlock_eagain; memcpy(&req->rq_private_buf, &req->rq_rcv_buf, sizeof(struct xdr_buf)); /* @@ -1077,12 +1073,6 @@ static int receive_cb_reply(struct svc_sock *svsk, struct svc_rqst *rqstp) rqstp->rq_arg.len = 0; spin_unlock(&bc_xprt->queue_lock); return 0; -unlock_notfound: - printk(KERN_NOTICE - "%s: Got unrecognized reply: " - "calldir 0x%x xpt_bc_xprt %p xid %08x\n", - __func__, ntohl(calldir), - bc_xprt, ntohl(xid)); unlock_eagain: spin_unlock(&bc_xprt->queue_lock); return -EAGAIN; diff --git a/net/sunrpc/xprtrdma/svc_rdma.c b/net/sunrpc/xprtrdma/svc_rdma.c index f0d5eeed4c88..f86970733eb0 100644 --- a/net/sunrpc/xprtrdma/svc_rdma.c +++ b/net/sunrpc/xprtrdma/svc_rdma.c @@ -256,28 +256,44 @@ out_err: return rc; } +struct workqueue_struct *svcrdma_wq; + void svc_rdma_cleanup(void) { - dprintk("SVCRDMA Module Removed, deregister RPC RDMA transport\n"); svc_unreg_xprt_class(&svc_rdma_class); svc_rdma_proc_cleanup(); + if (svcrdma_wq) { + struct workqueue_struct *wq = svcrdma_wq; + + svcrdma_wq = NULL; + destroy_workqueue(wq); + } + + dprintk("SVCRDMA Module Removed, deregister RPC RDMA transport\n"); } int svc_rdma_init(void) { + struct workqueue_struct *wq; int rc; - dprintk("SVCRDMA Module Init, register RPC RDMA transport\n"); - dprintk("\tsvcrdma_ord : %d\n", svcrdma_ord); - dprintk("\tmax_requests : %u\n", svcrdma_max_requests); - dprintk("\tmax_bc_requests : %u\n", svcrdma_max_bc_requests); - dprintk("\tmax_inline : %d\n", svcrdma_max_req_size); + wq = alloc_workqueue("svcrdma", WQ_UNBOUND, 0); + if (!wq) + return -ENOMEM; rc = svc_rdma_proc_init(); - if (rc) + if (rc) { + destroy_workqueue(wq); return rc; + } - /* Register RDMA with the SVC transport switch */ + svcrdma_wq = wq; svc_reg_xprt_class(&svc_rdma_class); + + dprintk("SVCRDMA Module Init, register RPC RDMA transport\n"); + dprintk("\tsvcrdma_ord : %d\n", svcrdma_ord); + dprintk("\tmax_requests : %u\n", svcrdma_max_requests); + dprintk("\tmax_bc_requests : %u\n", svcrdma_max_bc_requests); + dprintk("\tmax_inline : %d\n", svcrdma_max_req_size); return 0; } diff --git a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c index 7420a2c990c7..c9be6778643b 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_backchannel.c +++ b/net/sunrpc/xprtrdma/svc_rdma_backchannel.c @@ -76,15 +76,12 @@ static int svc_rdma_bc_sendto(struct svcxprt_rdma *rdma, struct rpc_rqst *rqst, struct svc_rdma_send_ctxt *sctxt) { - struct svc_rdma_recv_ctxt *rctxt; + struct svc_rdma_pcl empty_pcl; int ret; - rctxt = svc_rdma_recv_ctxt_get(rdma); - if (!rctxt) - return -EIO; - - ret = svc_rdma_map_reply_msg(rdma, sctxt, rctxt, &rqst->rq_snd_buf); - svc_rdma_recv_ctxt_put(rdma, rctxt); + pcl_init(&empty_pcl); + ret = svc_rdma_map_reply_msg(rdma, sctxt, &empty_pcl, &empty_pcl, + &rqst->rq_snd_buf); if (ret < 0) return -EIO; diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 3b05f90a3e50..d72953f29258 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -115,13 +115,6 @@ svc_rdma_next_recv_ctxt(struct list_head *list) rc_list); } -static void svc_rdma_recv_cid_init(struct svcxprt_rdma *rdma, - struct rpc_rdma_cid *cid) -{ - cid->ci_queue_id = rdma->sc_rq_cq->res.id; - cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids); -} - static struct svc_rdma_recv_ctxt * svc_rdma_recv_ctxt_alloc(struct svcxprt_rdma *rdma) { @@ -130,7 +123,7 @@ svc_rdma_recv_ctxt_alloc(struct svcxprt_rdma *rdma) dma_addr_t addr; void *buffer; - ctxt = kmalloc_node(sizeof(*ctxt), GFP_KERNEL, node); + ctxt = kzalloc_node(sizeof(*ctxt), GFP_KERNEL, node); if (!ctxt) goto fail0; buffer = kmalloc_node(rdma->sc_max_req_size, GFP_KERNEL, node); @@ -156,6 +149,7 @@ svc_rdma_recv_ctxt_alloc(struct svcxprt_rdma *rdma) ctxt->rc_recv_sge.length = rdma->sc_max_req_size; ctxt->rc_recv_sge.lkey = rdma->sc_pd->local_dma_lkey; ctxt->rc_recv_buf = buffer; + svc_rdma_cc_init(rdma, &ctxt->rc_cc); return ctxt; fail2: @@ -204,18 +198,11 @@ struct svc_rdma_recv_ctxt *svc_rdma_recv_ctxt_get(struct svcxprt_rdma *rdma) node = llist_del_first(&rdma->sc_recv_ctxts); if (!node) - goto out_empty; - ctxt = llist_entry(node, struct svc_rdma_recv_ctxt, rc_node); + return NULL; -out: + ctxt = llist_entry(node, struct svc_rdma_recv_ctxt, rc_node); ctxt->rc_page_count = 0; return ctxt; - -out_empty: - ctxt = svc_rdma_recv_ctxt_alloc(rdma); - if (!ctxt) - return NULL; - goto out; } /** @@ -227,6 +214,13 @@ out_empty: void svc_rdma_recv_ctxt_put(struct svcxprt_rdma *rdma, struct svc_rdma_recv_ctxt *ctxt) { + svc_rdma_cc_release(rdma, &ctxt->rc_cc, DMA_FROM_DEVICE); + + /* @rc_page_count is normally zero here, but error flows + * can leave pages in @rc_pages. + */ + release_pages(ctxt->rc_pages, ctxt->rc_page_count); + pcl_free(&ctxt->rc_call_pcl); pcl_free(&ctxt->rc_read_pcl); pcl_free(&ctxt->rc_write_pcl); @@ -271,13 +265,13 @@ static bool svc_rdma_refresh_recvs(struct svcxprt_rdma *rdma, if (!ctxt) break; - trace_svcrdma_post_recv(ctxt); + trace_svcrdma_post_recv(&ctxt->rc_cid); ctxt->rc_recv_wr.next = recv_chain; recv_chain = &ctxt->rc_recv_wr; rdma->sc_pending_recvs++; } if (!recv_chain) - return false; + return true; ret = ib_post_recv(rdma->sc_qp, recv_chain, &bad_wr); if (ret) @@ -301,10 +295,27 @@ err_free: * svc_rdma_post_recvs - Post initial set of Recv WRs * @rdma: fresh svcxprt_rdma * - * Returns true if successful, otherwise false. + * Return values: + * %true: Receive Queue initialization successful + * %false: memory allocation or DMA error */ bool svc_rdma_post_recvs(struct svcxprt_rdma *rdma) { + unsigned int total; + + /* For each credit, allocate enough recv_ctxts for one + * posted Receive and one RPC in process. + */ + total = (rdma->sc_max_requests * 2) + rdma->sc_recv_batch; + while (total--) { + struct svc_rdma_recv_ctxt *ctxt; + + ctxt = svc_rdma_recv_ctxt_alloc(rdma); + if (!ctxt) + return false; + llist_add(&ctxt->rc_node, &rdma->sc_recv_ctxts); + } + return svc_rdma_refresh_recvs(rdma, rdma->sc_max_requests); } @@ -373,6 +384,10 @@ void svc_rdma_flush_recv_queues(struct svcxprt_rdma *rdma) { struct svc_rdma_recv_ctxt *ctxt; + while ((ctxt = svc_rdma_next_recv_ctxt(&rdma->sc_read_complete_q))) { + list_del(&ctxt->rc_list); + svc_rdma_recv_ctxt_put(rdma, ctxt); + } while ((ctxt = svc_rdma_next_recv_ctxt(&rdma->sc_rq_dto_q))) { list_del(&ctxt->rc_list); svc_rdma_recv_ctxt_put(rdma, ctxt); @@ -754,6 +769,122 @@ static bool svc_rdma_is_reverse_direction_reply(struct svc_xprt *xprt, return true; } +/* Finish constructing the RPC Call message in rqstp::rq_arg. + * + * The incoming RPC/RDMA message is an RDMA_MSG type message + * with a single Read chunk (only the upper layer data payload + * was conveyed via RDMA Read). + */ +static void svc_rdma_read_complete_one(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *ctxt) +{ + struct svc_rdma_chunk *chunk = pcl_first_chunk(&ctxt->rc_read_pcl); + struct xdr_buf *buf = &rqstp->rq_arg; + unsigned int length; + + /* Split the Receive buffer between the head and tail + * buffers at Read chunk's position. XDR roundup of the + * chunk is not included in either the pagelist or in + * the tail. + */ + buf->tail[0].iov_base = buf->head[0].iov_base + chunk->ch_position; + buf->tail[0].iov_len = buf->head[0].iov_len - chunk->ch_position; + buf->head[0].iov_len = chunk->ch_position; + + /* Read chunk may need XDR roundup (see RFC 8166, s. 3.4.5.2). + * + * If the client already rounded up the chunk length, the + * length does not change. Otherwise, the length of the page + * list is increased to include XDR round-up. + * + * Currently these chunks always start at page offset 0, + * thus the rounded-up length never crosses a page boundary. + */ + buf->pages = &rqstp->rq_pages[0]; + length = xdr_align_size(chunk->ch_length); + buf->page_len = length; + buf->len += length; + buf->buflen += length; +} + +/* Finish constructing the RPC Call message in rqstp::rq_arg. + * + * The incoming RPC/RDMA message is an RDMA_MSG type message + * with payload in multiple Read chunks and no PZRC. + */ +static void svc_rdma_read_complete_multiple(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *ctxt) +{ + struct xdr_buf *buf = &rqstp->rq_arg; + + buf->len += ctxt->rc_readbytes; + buf->buflen += ctxt->rc_readbytes; + + buf->head[0].iov_base = page_address(rqstp->rq_pages[0]); + buf->head[0].iov_len = min_t(size_t, PAGE_SIZE, ctxt->rc_readbytes); + buf->pages = &rqstp->rq_pages[1]; + buf->page_len = ctxt->rc_readbytes - buf->head[0].iov_len; +} + +/* Finish constructing the RPC Call message in rqstp::rq_arg. + * + * The incoming RPC/RDMA message is an RDMA_NOMSG type message + * (the RPC message body was conveyed via RDMA Read). + */ +static void svc_rdma_read_complete_pzrc(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *ctxt) +{ + struct xdr_buf *buf = &rqstp->rq_arg; + + buf->len += ctxt->rc_readbytes; + buf->buflen += ctxt->rc_readbytes; + + buf->head[0].iov_base = page_address(rqstp->rq_pages[0]); + buf->head[0].iov_len = min_t(size_t, PAGE_SIZE, ctxt->rc_readbytes); + buf->pages = &rqstp->rq_pages[1]; + buf->page_len = ctxt->rc_readbytes - buf->head[0].iov_len; +} + +static noinline void svc_rdma_read_complete(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *ctxt) +{ + unsigned int i; + + /* Transfer the Read chunk pages into @rqstp.rq_pages, replacing + * the rq_pages that were already allocated for this rqstp. + */ + release_pages(rqstp->rq_respages, ctxt->rc_page_count); + for (i = 0; i < ctxt->rc_page_count; i++) + rqstp->rq_pages[i] = ctxt->rc_pages[i]; + + /* Update @rqstp's result send buffer to start after the + * last page in the RDMA Read payload. + */ + rqstp->rq_respages = &rqstp->rq_pages[ctxt->rc_page_count]; + rqstp->rq_next_page = rqstp->rq_respages + 1; + + /* Prevent svc_rdma_recv_ctxt_put() from releasing the + * pages in ctxt::rc_pages a second time. + */ + ctxt->rc_page_count = 0; + + /* Finish constructing the RPC Call message. The exact + * procedure for that depends on what kind of RPC/RDMA + * chunks were provided by the client. + */ + rqstp->rq_arg = ctxt->rc_saved_arg; + if (pcl_is_empty(&ctxt->rc_call_pcl)) { + if (ctxt->rc_read_pcl.cl_count == 1) + svc_rdma_read_complete_one(rqstp, ctxt); + else + svc_rdma_read_complete_multiple(rqstp, ctxt); + } else { + svc_rdma_read_complete_pzrc(rqstp, ctxt); + } + + trace_svcrdma_read_finished(&ctxt->rc_cid); +} + /** * svc_rdma_recvfrom - Receive an RPC call * @rqstp: request structure into which to receive an RPC Call @@ -798,8 +929,15 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) rqstp->rq_xprt_ctxt = NULL; - ctxt = NULL; spin_lock(&rdma_xprt->sc_rq_dto_lock); + ctxt = svc_rdma_next_recv_ctxt(&rdma_xprt->sc_read_complete_q); + if (ctxt) { + list_del(&ctxt->rc_list); + spin_unlock(&rdma_xprt->sc_rq_dto_lock); + svc_xprt_received(xprt); + svc_rdma_read_complete(rqstp, ctxt); + goto complete; + } ctxt = svc_rdma_next_recv_ctxt(&rdma_xprt->sc_rq_dto_q); if (ctxt) list_del(&ctxt->rc_list); @@ -831,12 +969,10 @@ int svc_rdma_recvfrom(struct svc_rqst *rqstp) svc_rdma_get_inv_rkey(rdma_xprt, ctxt); if (!pcl_is_empty(&ctxt->rc_read_pcl) || - !pcl_is_empty(&ctxt->rc_call_pcl)) { - ret = svc_rdma_process_read_list(rdma_xprt, rqstp, ctxt); - if (ret < 0) - goto out_readfail; - } + !pcl_is_empty(&ctxt->rc_call_pcl)) + goto out_readlist; +complete: rqstp->rq_xprt_ctxt = ctxt; rqstp->rq_prot = IPPROTO_MAX; svc_xprt_copy_addrs(rqstp, xprt); @@ -848,12 +984,23 @@ out_err: svc_rdma_recv_ctxt_put(rdma_xprt, ctxt); return 0; -out_readfail: - if (ret == -EINVAL) - svc_rdma_send_error(rdma_xprt, ctxt, ret); - svc_rdma_recv_ctxt_put(rdma_xprt, ctxt); - svc_xprt_deferred_close(xprt); - return -ENOTCONN; +out_readlist: + /* This @rqstp is about to be recycled. Save the work + * already done constructing the Call message in rq_arg + * so it can be restored when the RDMA Reads have + * completed. + */ + ctxt->rc_saved_arg = rqstp->rq_arg; + + ret = svc_rdma_process_read_list(rdma_xprt, rqstp, ctxt); + if (ret < 0) { + if (ret == -EINVAL) + svc_rdma_send_error(rdma_xprt, ctxt, ret); + svc_rdma_recv_ctxt_put(rdma_xprt, ctxt); + svc_xprt_deferred_close(xprt); + return ret; + } + return 0; out_backchannel: svc_rdma_handle_bc_reply(rqstp, ctxt); diff --git a/net/sunrpc/xprtrdma/svc_rdma_rw.c b/net/sunrpc/xprtrdma/svc_rdma_rw.c index e460e25a1d6d..c00fcce61d1e 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_rw.c +++ b/net/sunrpc/xprtrdma/svc_rdma_rw.c @@ -39,6 +39,7 @@ struct svc_rdma_rw_ctxt { struct list_head rw_list; struct rdma_rw_ctx rw_ctx; unsigned int rw_nents; + unsigned int rw_first_sgl_nents; struct sg_table rw_sg_table; struct scatterlist rw_first_sgl[]; }; @@ -53,6 +54,8 @@ svc_rdma_next_ctxt(struct list_head *list) static struct svc_rdma_rw_ctxt * svc_rdma_get_rw_ctxt(struct svcxprt_rdma *rdma, unsigned int sges) { + struct ib_device *dev = rdma->sc_cm_id->device; + unsigned int first_sgl_nents = dev->attrs.max_send_sge; struct svc_rdma_rw_ctxt *ctxt; struct llist_node *node; @@ -62,32 +65,33 @@ svc_rdma_get_rw_ctxt(struct svcxprt_rdma *rdma, unsigned int sges) if (node) { ctxt = llist_entry(node, struct svc_rdma_rw_ctxt, rw_node); } else { - ctxt = kmalloc_node(struct_size(ctxt, rw_first_sgl, SG_CHUNK_SIZE), - GFP_KERNEL, ibdev_to_node(rdma->sc_cm_id->device)); + ctxt = kmalloc_node(struct_size(ctxt, rw_first_sgl, first_sgl_nents), + GFP_KERNEL, ibdev_to_node(dev)); if (!ctxt) goto out_noctx; INIT_LIST_HEAD(&ctxt->rw_list); + ctxt->rw_first_sgl_nents = first_sgl_nents; } ctxt->rw_sg_table.sgl = ctxt->rw_first_sgl; if (sg_alloc_table_chained(&ctxt->rw_sg_table, sges, ctxt->rw_sg_table.sgl, - SG_CHUNK_SIZE)) + first_sgl_nents)) goto out_free; return ctxt; out_free: kfree(ctxt); out_noctx: - trace_svcrdma_no_rwctx_err(rdma, sges); + trace_svcrdma_rwctx_empty(rdma, sges); return NULL; } static void __svc_rdma_put_rw_ctxt(struct svc_rdma_rw_ctxt *ctxt, struct llist_head *list) { - sg_free_table_chained(&ctxt->rw_sg_table, SG_CHUNK_SIZE); + sg_free_table_chained(&ctxt->rw_sg_table, ctxt->rw_first_sgl_nents); llist_add(&ctxt->rw_node, list); } @@ -135,57 +139,40 @@ static int svc_rdma_rw_ctx_init(struct svcxprt_rdma *rdma, ctxt->rw_sg_table.sgl, ctxt->rw_nents, 0, offset, handle, direction); if (unlikely(ret < 0)) { + trace_svcrdma_dma_map_rw_err(rdma, offset, handle, + ctxt->rw_nents, ret); svc_rdma_put_rw_ctxt(rdma, ctxt); - trace_svcrdma_dma_map_rw_err(rdma, ctxt->rw_nents, ret); } return ret; } -/* A chunk context tracks all I/O for moving one Read or Write - * chunk. This is a set of rdma_rw's that handle data movement - * for all segments of one chunk. - * - * These are small, acquired with a single allocator call, and - * no more than one is needed per chunk. They are allocated on - * demand, and not cached. +/** + * svc_rdma_cc_init - Initialize an svc_rdma_chunk_ctxt + * @rdma: controlling transport instance + * @cc: svc_rdma_chunk_ctxt to be initialized */ -struct svc_rdma_chunk_ctxt { - struct rpc_rdma_cid cc_cid; - struct ib_cqe cc_cqe; - struct svcxprt_rdma *cc_rdma; - struct list_head cc_rwctxts; - ktime_t cc_posttime; - int cc_sqecount; - enum ib_wc_status cc_status; - struct completion cc_done; -}; - -static void svc_rdma_cc_cid_init(struct svcxprt_rdma *rdma, - struct rpc_rdma_cid *cid) +void svc_rdma_cc_init(struct svcxprt_rdma *rdma, + struct svc_rdma_chunk_ctxt *cc) { - cid->ci_queue_id = rdma->sc_sq_cq->res.id; - cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids); -} + struct rpc_rdma_cid *cid = &cc->cc_cid; -static void svc_rdma_cc_init(struct svcxprt_rdma *rdma, - struct svc_rdma_chunk_ctxt *cc) -{ - svc_rdma_cc_cid_init(rdma, &cc->cc_cid); - cc->cc_rdma = rdma; + if (unlikely(!cid->ci_completion_id)) + svc_rdma_send_cid_init(rdma, cid); INIT_LIST_HEAD(&cc->cc_rwctxts); cc->cc_sqecount = 0; } -/* - * The consumed rw_ctx's are cleaned and placed on a local llist so - * that only one atomic llist operation is needed to put them all - * back on the free list. +/** + * svc_rdma_cc_release - Release resources held by a svc_rdma_chunk_ctxt + * @rdma: controlling transport instance + * @cc: svc_rdma_chunk_ctxt to be released + * @dir: DMA direction */ -static void svc_rdma_cc_release(struct svc_rdma_chunk_ctxt *cc, - enum dma_data_direction dir) +void svc_rdma_cc_release(struct svcxprt_rdma *rdma, + struct svc_rdma_chunk_ctxt *cc, + enum dma_data_direction dir) { - struct svcxprt_rdma *rdma = cc->cc_rdma; struct llist_node *first, *last; struct svc_rdma_rw_ctxt *ctxt; LLIST_HEAD(free); @@ -215,6 +202,8 @@ static void svc_rdma_cc_release(struct svc_rdma_chunk_ctxt *cc, * - Stores arguments for the SGL constructor functions */ struct svc_rdma_write_info { + struct svcxprt_rdma *wi_rdma; + const struct svc_rdma_chunk *wi_chunk; /* write state of this chunk */ @@ -227,6 +216,7 @@ struct svc_rdma_write_info { unsigned int wi_next_off; struct svc_rdma_chunk_ctxt wi_cc; + struct work_struct wi_work; }; static struct svc_rdma_write_info * @@ -235,25 +225,33 @@ svc_rdma_write_info_alloc(struct svcxprt_rdma *rdma, { struct svc_rdma_write_info *info; - info = kmalloc_node(sizeof(*info), GFP_KERNEL, + info = kzalloc_node(sizeof(*info), GFP_KERNEL, ibdev_to_node(rdma->sc_cm_id->device)); if (!info) return info; + info->wi_rdma = rdma; info->wi_chunk = chunk; - info->wi_seg_off = 0; - info->wi_seg_no = 0; svc_rdma_cc_init(rdma, &info->wi_cc); info->wi_cc.cc_cqe.done = svc_rdma_write_done; return info; } -static void svc_rdma_write_info_free(struct svc_rdma_write_info *info) +static void svc_rdma_write_info_free_async(struct work_struct *work) { - svc_rdma_cc_release(&info->wi_cc, DMA_TO_DEVICE); + struct svc_rdma_write_info *info; + + info = container_of(work, struct svc_rdma_write_info, wi_work); + svc_rdma_cc_release(info->wi_rdma, &info->wi_cc, DMA_TO_DEVICE); kfree(info); } +static void svc_rdma_write_info_free(struct svc_rdma_write_info *info) +{ + INIT_WORK(&info->wi_work, svc_rdma_write_info_free_async); + queue_work(svcrdma_wq, &info->wi_work); +} + /** * svc_rdma_write_done - Write chunk completion * @cq: controlling Completion Queue @@ -263,16 +261,16 @@ static void svc_rdma_write_info_free(struct svc_rdma_write_info *info) */ static void svc_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc) { + struct svcxprt_rdma *rdma = cq->cq_context; struct ib_cqe *cqe = wc->wr_cqe; struct svc_rdma_chunk_ctxt *cc = container_of(cqe, struct svc_rdma_chunk_ctxt, cc_cqe); - struct svcxprt_rdma *rdma = cc->cc_rdma; struct svc_rdma_write_info *info = container_of(cc, struct svc_rdma_write_info, wi_cc); switch (wc->status) { case IB_WC_SUCCESS: - trace_svcrdma_wc_write(wc, &cc->cc_cid); + trace_svcrdma_wc_write(&cc->cc_cid); break; case IB_WC_WR_FLUSH_ERR: trace_svcrdma_wc_write_flush(wc, &cc->cc_cid); @@ -289,39 +287,6 @@ static void svc_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc) svc_rdma_write_info_free(info); } -/* State for pulling a Read chunk. - */ -struct svc_rdma_read_info { - struct svc_rqst *ri_rqst; - struct svc_rdma_recv_ctxt *ri_readctxt; - unsigned int ri_pageno; - unsigned int ri_pageoff; - unsigned int ri_totalbytes; - - struct svc_rdma_chunk_ctxt ri_cc; -}; - -static struct svc_rdma_read_info * -svc_rdma_read_info_alloc(struct svcxprt_rdma *rdma) -{ - struct svc_rdma_read_info *info; - - info = kmalloc_node(sizeof(*info), GFP_KERNEL, - ibdev_to_node(rdma->sc_cm_id->device)); - if (!info) - return info; - - svc_rdma_cc_init(rdma, &info->ri_cc); - info->ri_cc.cc_cqe.done = svc_rdma_wc_read_done; - return info; -} - -static void svc_rdma_read_info_free(struct svc_rdma_read_info *info) -{ - svc_rdma_cc_release(&info->ri_cc, DMA_FROM_DEVICE); - kfree(info); -} - /** * svc_rdma_wc_read_done - Handle completion of an RDMA Read ctx * @cq: controlling Completion Queue @@ -330,17 +295,27 @@ static void svc_rdma_read_info_free(struct svc_rdma_read_info *info) */ static void svc_rdma_wc_read_done(struct ib_cq *cq, struct ib_wc *wc) { + struct svcxprt_rdma *rdma = cq->cq_context; struct ib_cqe *cqe = wc->wr_cqe; struct svc_rdma_chunk_ctxt *cc = container_of(cqe, struct svc_rdma_chunk_ctxt, cc_cqe); - struct svc_rdma_read_info *info; + struct svc_rdma_recv_ctxt *ctxt; + svc_rdma_wake_send_waiters(rdma, cc->cc_sqecount); + + ctxt = container_of(cc, struct svc_rdma_recv_ctxt, rc_cc); switch (wc->status) { case IB_WC_SUCCESS: - info = container_of(cc, struct svc_rdma_read_info, ri_cc); - trace_svcrdma_wc_read(wc, &cc->cc_cid, info->ri_totalbytes, + trace_svcrdma_wc_read(wc, &cc->cc_cid, ctxt->rc_readbytes, cc->cc_posttime); - break; + + spin_lock(&rdma->sc_rq_dto_lock); + list_add_tail(&ctxt->rc_list, &rdma->sc_read_complete_q); + /* the unlock pairs with the smp_rmb in svc_xprt_ready */ + set_bit(XPT_DATA, &rdma->sc_xprt.xpt_flags); + spin_unlock(&rdma->sc_rq_dto_lock); + svc_xprt_enqueue(&rdma->sc_xprt); + return; case IB_WC_WR_FLUSH_ERR: trace_svcrdma_wc_read_flush(wc, &cc->cc_cid); break; @@ -348,10 +323,13 @@ static void svc_rdma_wc_read_done(struct ib_cq *cq, struct ib_wc *wc) trace_svcrdma_wc_read_err(wc, &cc->cc_cid); } - svc_rdma_wake_send_waiters(cc->cc_rdma, cc->cc_sqecount); - cc->cc_status = wc->status; - complete(&cc->cc_done); - return; + /* The RDMA Read has flushed, so the incoming RPC message + * cannot be constructed and must be dropped. Signal the + * loss to the client by closing the connection. + */ + svc_rdma_cc_release(rdma, cc, DMA_FROM_DEVICE); + svc_rdma_recv_ctxt_put(rdma, ctxt); + svc_xprt_deferred_close(&rdma->sc_xprt); } /* @@ -360,9 +338,9 @@ static void svc_rdma_wc_read_done(struct ib_cq *cq, struct ib_wc *wc) * even if one or more WRs are flushed. This is true when posting * an rdma_rw_ctx or when posting a single signaled WR. */ -static int svc_rdma_post_chunk_ctxt(struct svc_rdma_chunk_ctxt *cc) +static int svc_rdma_post_chunk_ctxt(struct svcxprt_rdma *rdma, + struct svc_rdma_chunk_ctxt *cc) { - struct svcxprt_rdma *rdma = cc->cc_rdma; struct ib_send_wr *first_wr; const struct ib_send_wr *bad_wr; struct list_head *tmp; @@ -396,14 +374,14 @@ static int svc_rdma_post_chunk_ctxt(struct svc_rdma_chunk_ctxt *cc) } percpu_counter_inc(&svcrdma_stat_sq_starve); - trace_svcrdma_sq_full(rdma); + trace_svcrdma_sq_full(rdma, &cc->cc_cid); atomic_add(cc->cc_sqecount, &rdma->sc_sq_avail); wait_event(rdma->sc_send_wait, atomic_read(&rdma->sc_sq_avail) > cc->cc_sqecount); - trace_svcrdma_sq_retry(rdma); + trace_svcrdma_sq_retry(rdma, &cc->cc_cid); } while (1); - trace_svcrdma_sq_post_err(rdma, ret); + trace_svcrdma_sq_post_err(rdma, &cc->cc_cid, ret); svc_xprt_deferred_close(&rdma->sc_xprt); /* If even one was posted, there will be a completion. */ @@ -473,7 +451,7 @@ svc_rdma_build_writes(struct svc_rdma_write_info *info, unsigned int remaining) { struct svc_rdma_chunk_ctxt *cc = &info->wi_cc; - struct svcxprt_rdma *rdma = cc->cc_rdma; + struct svcxprt_rdma *rdma = info->wi_rdma; const struct svc_rdma_segment *seg; struct svc_rdma_rw_ctxt *ctxt; int ret; @@ -516,7 +494,7 @@ svc_rdma_build_writes(struct svc_rdma_write_info *info, return 0; out_overflow: - trace_svcrdma_small_wrch_err(rdma, remaining, info->wi_seg_no, + trace_svcrdma_small_wrch_err(&cc->cc_cid, remaining, info->wi_seg_no, info->wi_chunk->ch_segcount); return -E2BIG; } @@ -633,7 +611,7 @@ int svc_rdma_send_write_chunk(struct svcxprt_rdma *rdma, goto out_err; trace_svcrdma_post_write_chunk(&cc->cc_cid, cc->cc_sqecount); - ret = svc_rdma_post_chunk_ctxt(cc); + ret = svc_rdma_post_chunk_ctxt(rdma, cc); if (ret < 0) goto out_err; return xdr->len; @@ -680,7 +658,7 @@ int svc_rdma_send_reply_chunk(struct svcxprt_rdma *rdma, goto out_err; trace_svcrdma_post_reply_chunk(&cc->cc_cid, cc->cc_sqecount); - ret = svc_rdma_post_chunk_ctxt(cc); + ret = svc_rdma_post_chunk_ctxt(rdma, cc); if (ret < 0) goto out_err; @@ -693,7 +671,8 @@ out_err: /** * svc_rdma_build_read_segment - Build RDMA Read WQEs to pull one RDMA segment - * @info: context for ongoing I/O + * @rqstp: RPC transaction context + * @head: context for ongoing I/O * @segment: co-ordinates of remote memory to be read * * Returns: @@ -702,20 +681,20 @@ out_err: * %-ENOMEM: allocating a local resources failed * %-EIO: a DMA mapping error occurred */ -static int svc_rdma_build_read_segment(struct svc_rdma_read_info *info, +static int svc_rdma_build_read_segment(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head, const struct svc_rdma_segment *segment) { - struct svc_rdma_recv_ctxt *head = info->ri_readctxt; - struct svc_rdma_chunk_ctxt *cc = &info->ri_cc; - struct svc_rqst *rqstp = info->ri_rqst; + struct svcxprt_rdma *rdma = svc_rdma_rqst_rdma(rqstp); + struct svc_rdma_chunk_ctxt *cc = &head->rc_cc; unsigned int sge_no, seg_len, len; struct svc_rdma_rw_ctxt *ctxt; struct scatterlist *sg; int ret; len = segment->rs_length; - sge_no = PAGE_ALIGN(info->ri_pageoff + len) >> PAGE_SHIFT; - ctxt = svc_rdma_get_rw_ctxt(cc->cc_rdma, sge_no); + sge_no = PAGE_ALIGN(head->rc_pageoff + len) >> PAGE_SHIFT; + ctxt = svc_rdma_get_rw_ctxt(rdma, sge_no); if (!ctxt) return -ENOMEM; ctxt->rw_nents = sge_no; @@ -723,29 +702,27 @@ static int svc_rdma_build_read_segment(struct svc_rdma_read_info *info, sg = ctxt->rw_sg_table.sgl; for (sge_no = 0; sge_no < ctxt->rw_nents; sge_no++) { seg_len = min_t(unsigned int, len, - PAGE_SIZE - info->ri_pageoff); + PAGE_SIZE - head->rc_pageoff); - if (!info->ri_pageoff) + if (!head->rc_pageoff) head->rc_page_count++; - sg_set_page(sg, rqstp->rq_pages[info->ri_pageno], - seg_len, info->ri_pageoff); + sg_set_page(sg, rqstp->rq_pages[head->rc_curpage], + seg_len, head->rc_pageoff); sg = sg_next(sg); - info->ri_pageoff += seg_len; - if (info->ri_pageoff == PAGE_SIZE) { - info->ri_pageno++; - info->ri_pageoff = 0; + head->rc_pageoff += seg_len; + if (head->rc_pageoff == PAGE_SIZE) { + head->rc_curpage++; + head->rc_pageoff = 0; } len -= seg_len; - /* Safety check */ - if (len && - &rqstp->rq_pages[info->ri_pageno + 1] > rqstp->rq_page_end) + if (len && ((head->rc_curpage + 1) > ARRAY_SIZE(rqstp->rq_pages))) goto out_overrun; } - ret = svc_rdma_rw_ctx_init(cc->cc_rdma, ctxt, segment->rs_offset, + ret = svc_rdma_rw_ctx_init(rdma, ctxt, segment->rs_offset, segment->rs_handle, DMA_FROM_DEVICE); if (ret < 0) return -EIO; @@ -756,13 +733,14 @@ static int svc_rdma_build_read_segment(struct svc_rdma_read_info *info, return 0; out_overrun: - trace_svcrdma_page_overrun_err(cc->cc_rdma, rqstp, info->ri_pageno); + trace_svcrdma_page_overrun_err(&cc->cc_cid, head->rc_curpage); return -EINVAL; } /** * svc_rdma_build_read_chunk - Build RDMA Read WQEs to pull one RDMA chunk - * @info: context for ongoing I/O + * @rqstp: RPC transaction context + * @head: context for ongoing I/O * @chunk: Read chunk to pull * * Return values: @@ -771,7 +749,8 @@ out_overrun: * %-ENOMEM: allocating a local resources failed * %-EIO: a DMA mapping error occurred */ -static int svc_rdma_build_read_chunk(struct svc_rdma_read_info *info, +static int svc_rdma_build_read_chunk(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head, const struct svc_rdma_chunk *chunk) { const struct svc_rdma_segment *segment; @@ -779,56 +758,56 @@ static int svc_rdma_build_read_chunk(struct svc_rdma_read_info *info, ret = -EINVAL; pcl_for_each_segment(segment, chunk) { - ret = svc_rdma_build_read_segment(info, segment); + ret = svc_rdma_build_read_segment(rqstp, head, segment); if (ret < 0) break; - info->ri_totalbytes += segment->rs_length; + head->rc_readbytes += segment->rs_length; } return ret; } /** * svc_rdma_copy_inline_range - Copy part of the inline content into pages - * @info: context for RDMA Reads + * @rqstp: RPC transaction context + * @head: context for ongoing I/O * @offset: offset into the Receive buffer of region to copy * @remaining: length of region to copy * * Take a page at a time from rqstp->rq_pages and copy the inline * content from the Receive buffer into that page. Update - * info->ri_pageno and info->ri_pageoff so that the next RDMA Read + * head->rc_curpage and head->rc_pageoff so that the next RDMA Read * result will land contiguously with the copied content. * * Return values: * %0: Inline content was successfully copied * %-EINVAL: offset or length was incorrect */ -static int svc_rdma_copy_inline_range(struct svc_rdma_read_info *info, +static int svc_rdma_copy_inline_range(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head, unsigned int offset, unsigned int remaining) { - struct svc_rdma_recv_ctxt *head = info->ri_readctxt; unsigned char *dst, *src = head->rc_recv_buf; - struct svc_rqst *rqstp = info->ri_rqst; unsigned int page_no, numpages; - numpages = PAGE_ALIGN(info->ri_pageoff + remaining) >> PAGE_SHIFT; + numpages = PAGE_ALIGN(head->rc_pageoff + remaining) >> PAGE_SHIFT; for (page_no = 0; page_no < numpages; page_no++) { unsigned int page_len; page_len = min_t(unsigned int, remaining, - PAGE_SIZE - info->ri_pageoff); + PAGE_SIZE - head->rc_pageoff); - if (!info->ri_pageoff) + if (!head->rc_pageoff) head->rc_page_count++; - dst = page_address(rqstp->rq_pages[info->ri_pageno]); - memcpy(dst + info->ri_pageno, src + offset, page_len); + dst = page_address(rqstp->rq_pages[head->rc_curpage]); + memcpy(dst + head->rc_curpage, src + offset, page_len); - info->ri_totalbytes += page_len; - info->ri_pageoff += page_len; - if (info->ri_pageoff == PAGE_SIZE) { - info->ri_pageno++; - info->ri_pageoff = 0; + head->rc_readbytes += page_len; + head->rc_pageoff += page_len; + if (head->rc_pageoff == PAGE_SIZE) { + head->rc_curpage++; + head->rc_pageoff = 0; } remaining -= page_len; offset += page_len; @@ -839,7 +818,8 @@ static int svc_rdma_copy_inline_range(struct svc_rdma_read_info *info, /** * svc_rdma_read_multiple_chunks - Construct RDMA Reads to pull data item Read chunks - * @info: context for RDMA Reads + * @rqstp: RPC transaction context + * @head: context for ongoing I/O * * The chunk data lands in rqstp->rq_arg as a series of contiguous pages, * like an incoming TCP call. @@ -851,11 +831,11 @@ static int svc_rdma_copy_inline_range(struct svc_rdma_read_info *info, * %-ENOTCONN: posting failed (connection is lost), * %-EIO: rdma_rw initialization failed (DMA mapping, etc). */ -static noinline int svc_rdma_read_multiple_chunks(struct svc_rdma_read_info *info) +static noinline int +svc_rdma_read_multiple_chunks(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head) { - struct svc_rdma_recv_ctxt *head = info->ri_readctxt; const struct svc_rdma_pcl *pcl = &head->rc_read_pcl; - struct xdr_buf *buf = &info->ri_rqst->rq_arg; struct svc_rdma_chunk *chunk, *next; unsigned int start, length; int ret; @@ -863,12 +843,12 @@ static noinline int svc_rdma_read_multiple_chunks(struct svc_rdma_read_info *inf start = 0; chunk = pcl_first_chunk(pcl); length = chunk->ch_position; - ret = svc_rdma_copy_inline_range(info, start, length); + ret = svc_rdma_copy_inline_range(rqstp, head, start, length); if (ret < 0) return ret; pcl_for_each_chunk(chunk, pcl) { - ret = svc_rdma_build_read_chunk(info, chunk); + ret = svc_rdma_build_read_chunk(rqstp, head, chunk); if (ret < 0) return ret; @@ -877,31 +857,21 @@ static noinline int svc_rdma_read_multiple_chunks(struct svc_rdma_read_info *inf break; start += length; - length = next->ch_position - info->ri_totalbytes; - ret = svc_rdma_copy_inline_range(info, start, length); + length = next->ch_position - head->rc_readbytes; + ret = svc_rdma_copy_inline_range(rqstp, head, start, length); if (ret < 0) return ret; } start += length; length = head->rc_byte_len - start; - ret = svc_rdma_copy_inline_range(info, start, length); - if (ret < 0) - return ret; - - buf->len += info->ri_totalbytes; - buf->buflen += info->ri_totalbytes; - - buf->head[0].iov_base = page_address(info->ri_rqst->rq_pages[0]); - buf->head[0].iov_len = min_t(size_t, PAGE_SIZE, info->ri_totalbytes); - buf->pages = &info->ri_rqst->rq_pages[1]; - buf->page_len = info->ri_totalbytes - buf->head[0].iov_len; - return 0; + return svc_rdma_copy_inline_range(rqstp, head, start, length); } /** * svc_rdma_read_data_item - Construct RDMA Reads to pull data item Read chunks - * @info: context for RDMA Reads + * @rqstp: RPC transaction context + * @head: context for ongoing I/O * * The chunk data lands in the page list of rqstp->rq_arg.pages. * @@ -916,50 +886,17 @@ static noinline int svc_rdma_read_multiple_chunks(struct svc_rdma_read_info *inf * %-ENOTCONN: posting failed (connection is lost), * %-EIO: rdma_rw initialization failed (DMA mapping, etc). */ -static int svc_rdma_read_data_item(struct svc_rdma_read_info *info) +static int svc_rdma_read_data_item(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head) { - struct svc_rdma_recv_ctxt *head = info->ri_readctxt; - struct xdr_buf *buf = &info->ri_rqst->rq_arg; - struct svc_rdma_chunk *chunk; - unsigned int length; - int ret; - - chunk = pcl_first_chunk(&head->rc_read_pcl); - ret = svc_rdma_build_read_chunk(info, chunk); - if (ret < 0) - goto out; - - /* Split the Receive buffer between the head and tail - * buffers at Read chunk's position. XDR roundup of the - * chunk is not included in either the pagelist or in - * the tail. - */ - buf->tail[0].iov_base = buf->head[0].iov_base + chunk->ch_position; - buf->tail[0].iov_len = buf->head[0].iov_len - chunk->ch_position; - buf->head[0].iov_len = chunk->ch_position; - - /* Read chunk may need XDR roundup (see RFC 8166, s. 3.4.5.2). - * - * If the client already rounded up the chunk length, the - * length does not change. Otherwise, the length of the page - * list is increased to include XDR round-up. - * - * Currently these chunks always start at page offset 0, - * thus the rounded-up length never crosses a page boundary. - */ - buf->pages = &info->ri_rqst->rq_pages[0]; - length = xdr_align_size(chunk->ch_length); - buf->page_len = length; - buf->len += length; - buf->buflen += length; - -out: - return ret; + return svc_rdma_build_read_chunk(rqstp, head, + pcl_first_chunk(&head->rc_read_pcl)); } /** - * svc_rdma_read_chunk_range - Build RDMA Read WQEs for portion of a chunk - * @info: context for RDMA Reads + * svc_rdma_read_chunk_range - Build RDMA Read WRs for portion of a chunk + * @rqstp: RPC transaction context + * @head: context for ongoing I/O * @chunk: parsed Call chunk to pull * @offset: offset of region to pull * @length: length of region to pull @@ -971,7 +908,8 @@ out: * %-ENOTCONN: posting failed (connection is lost), * %-EIO: rdma_rw initialization failed (DMA mapping, etc). */ -static int svc_rdma_read_chunk_range(struct svc_rdma_read_info *info, +static int svc_rdma_read_chunk_range(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head, const struct svc_rdma_chunk *chunk, unsigned int offset, unsigned int length) { @@ -991,11 +929,11 @@ static int svc_rdma_read_chunk_range(struct svc_rdma_read_info *info, dummy.rs_length = min_t(u32, length, segment->rs_length) - offset; dummy.rs_offset = segment->rs_offset + offset; - ret = svc_rdma_build_read_segment(info, &dummy); + ret = svc_rdma_build_read_segment(rqstp, head, &dummy); if (ret < 0) break; - info->ri_totalbytes += dummy.rs_length; + head->rc_readbytes += dummy.rs_length; length -= dummy.rs_length; offset = 0; } @@ -1004,7 +942,8 @@ static int svc_rdma_read_chunk_range(struct svc_rdma_read_info *info, /** * svc_rdma_read_call_chunk - Build RDMA Read WQEs to pull a Long Message - * @info: context for RDMA Reads + * @rqstp: RPC transaction context + * @head: context for ongoing I/O * * Return values: * %0: RDMA Read WQEs were successfully built @@ -1013,9 +952,9 @@ static int svc_rdma_read_chunk_range(struct svc_rdma_read_info *info, * %-ENOTCONN: posting failed (connection is lost), * %-EIO: rdma_rw initialization failed (DMA mapping, etc). */ -static int svc_rdma_read_call_chunk(struct svc_rdma_read_info *info) +static int svc_rdma_read_call_chunk(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head) { - struct svc_rdma_recv_ctxt *head = info->ri_readctxt; const struct svc_rdma_chunk *call_chunk = pcl_first_chunk(&head->rc_call_pcl); const struct svc_rdma_pcl *pcl = &head->rc_read_pcl; @@ -1024,17 +963,18 @@ static int svc_rdma_read_call_chunk(struct svc_rdma_read_info *info) int ret; if (pcl_is_empty(pcl)) - return svc_rdma_build_read_chunk(info, call_chunk); + return svc_rdma_build_read_chunk(rqstp, head, call_chunk); start = 0; chunk = pcl_first_chunk(pcl); length = chunk->ch_position; - ret = svc_rdma_read_chunk_range(info, call_chunk, start, length); + ret = svc_rdma_read_chunk_range(rqstp, head, call_chunk, + start, length); if (ret < 0) return ret; pcl_for_each_chunk(chunk, pcl) { - ret = svc_rdma_build_read_chunk(info, chunk); + ret = svc_rdma_build_read_chunk(rqstp, head, chunk); if (ret < 0) return ret; @@ -1043,8 +983,8 @@ static int svc_rdma_read_call_chunk(struct svc_rdma_read_info *info) break; start += length; - length = next->ch_position - info->ri_totalbytes; - ret = svc_rdma_read_chunk_range(info, call_chunk, + length = next->ch_position - head->rc_readbytes; + ret = svc_rdma_read_chunk_range(rqstp, head, call_chunk, start, length); if (ret < 0) return ret; @@ -1052,12 +992,14 @@ static int svc_rdma_read_call_chunk(struct svc_rdma_read_info *info) start += length; length = call_chunk->ch_length - start; - return svc_rdma_read_chunk_range(info, call_chunk, start, length); + return svc_rdma_read_chunk_range(rqstp, head, call_chunk, + start, length); } /** * svc_rdma_read_special - Build RDMA Read WQEs to pull a Long Message - * @info: context for RDMA Reads + * @rqstp: RPC transaction context + * @head: context for ongoing I/O * * The start of the data lands in the first page just after the * Transport header, and the rest lands in rqstp->rq_arg.pages. @@ -1073,25 +1015,31 @@ static int svc_rdma_read_call_chunk(struct svc_rdma_read_info *info) * %-ENOTCONN: posting failed (connection is lost), * %-EIO: rdma_rw initialization failed (DMA mapping, etc). */ -static noinline int svc_rdma_read_special(struct svc_rdma_read_info *info) +static noinline int svc_rdma_read_special(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head) { - struct xdr_buf *buf = &info->ri_rqst->rq_arg; - int ret; - - ret = svc_rdma_read_call_chunk(info); - if (ret < 0) - goto out; - - buf->len += info->ri_totalbytes; - buf->buflen += info->ri_totalbytes; + return svc_rdma_read_call_chunk(rqstp, head); +} - buf->head[0].iov_base = page_address(info->ri_rqst->rq_pages[0]); - buf->head[0].iov_len = min_t(size_t, PAGE_SIZE, info->ri_totalbytes); - buf->pages = &info->ri_rqst->rq_pages[1]; - buf->page_len = info->ri_totalbytes - buf->head[0].iov_len; +/* Pages under I/O have been copied to head->rc_pages. Ensure that + * svc_xprt_release() does not put them when svc_rdma_recvfrom() + * returns. This has to be done after all Read WRs are constructed + * to properly handle a page that happens to be part of I/O on behalf + * of two different RDMA segments. + * + * Note: if the subsequent post_send fails, these pages have already + * been moved to head->rc_pages and thus will be cleaned up by + * svc_rdma_recv_ctxt_put(). + */ +static void svc_rdma_clear_rqst_pages(struct svc_rqst *rqstp, + struct svc_rdma_recv_ctxt *head) +{ + unsigned int i; -out: - return ret; + for (i = 0; i < head->rc_page_count; i++) { + head->rc_pages[i] = rqstp->rq_pages[i]; + rqstp->rq_pages[i] = NULL; + } } /** @@ -1121,49 +1069,27 @@ int svc_rdma_process_read_list(struct svcxprt_rdma *rdma, struct svc_rqst *rqstp, struct svc_rdma_recv_ctxt *head) { - struct svc_rdma_read_info *info; - struct svc_rdma_chunk_ctxt *cc; + struct svc_rdma_chunk_ctxt *cc = &head->rc_cc; int ret; - info = svc_rdma_read_info_alloc(rdma); - if (!info) - return -ENOMEM; - cc = &info->ri_cc; - info->ri_rqst = rqstp; - info->ri_readctxt = head; - info->ri_pageno = 0; - info->ri_pageoff = 0; - info->ri_totalbytes = 0; + cc->cc_cqe.done = svc_rdma_wc_read_done; + cc->cc_sqecount = 0; + head->rc_pageoff = 0; + head->rc_curpage = 0; + head->rc_readbytes = 0; if (pcl_is_empty(&head->rc_call_pcl)) { if (head->rc_read_pcl.cl_count == 1) - ret = svc_rdma_read_data_item(info); + ret = svc_rdma_read_data_item(rqstp, head); else - ret = svc_rdma_read_multiple_chunks(info); + ret = svc_rdma_read_multiple_chunks(rqstp, head); } else - ret = svc_rdma_read_special(info); + ret = svc_rdma_read_special(rqstp, head); + svc_rdma_clear_rqst_pages(rqstp, head); if (ret < 0) - goto out_err; + return ret; trace_svcrdma_post_read_chunk(&cc->cc_cid, cc->cc_sqecount); - init_completion(&cc->cc_done); - ret = svc_rdma_post_chunk_ctxt(cc); - if (ret < 0) - goto out_err; - - ret = 1; - wait_for_completion(&cc->cc_done); - if (cc->cc_status != IB_WC_SUCCESS) - ret = -EIO; - - /* rq_respages starts after the last arg page */ - rqstp->rq_respages = &rqstp->rq_pages[head->rc_page_count]; - rqstp->rq_next_page = rqstp->rq_respages + 1; - - /* Ensure svc_rdma_recv_ctxt_put() does not try to release pages */ - head->rc_page_count = 0; - -out_err: - svc_rdma_read_info_free(info); - return ret; + ret = svc_rdma_post_chunk_ctxt(rdma, cc); + return ret < 0 ? ret : 1; } diff --git a/net/sunrpc/xprtrdma/svc_rdma_sendto.c b/net/sunrpc/xprtrdma/svc_rdma_sendto.c index c6644cca52c5..1a49b7f02041 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_sendto.c +++ b/net/sunrpc/xprtrdma/svc_rdma_sendto.c @@ -113,13 +113,6 @@ static void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc); -static void svc_rdma_send_cid_init(struct svcxprt_rdma *rdma, - struct rpc_rdma_cid *cid) -{ - cid->ci_queue_id = rdma->sc_sq_cq->res.id; - cid->ci_completion_id = atomic_inc_return(&rdma->sc_completion_ids); -} - static struct svc_rdma_send_ctxt * svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma) { @@ -129,7 +122,7 @@ svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma) void *buffer; int i; - ctxt = kmalloc_node(struct_size(ctxt, sc_sges, rdma->sc_max_send_sges), + ctxt = kzalloc_node(struct_size(ctxt, sc_sges, rdma->sc_max_send_sges), GFP_KERNEL, node); if (!ctxt) goto fail0; @@ -143,6 +136,7 @@ svc_rdma_send_ctxt_alloc(struct svcxprt_rdma *rdma) svc_rdma_send_cid_init(rdma, &ctxt->sc_cid); + ctxt->sc_rdma = rdma; ctxt->sc_send_wr.next = NULL; ctxt->sc_send_wr.wr_cqe = &ctxt->sc_cqe; ctxt->sc_send_wr.sg_list = ctxt->sc_sges; @@ -200,10 +194,11 @@ struct svc_rdma_send_ctxt *svc_rdma_send_ctxt_get(struct svcxprt_rdma *rdma) spin_lock(&rdma->sc_send_lock); node = llist_del_first(&rdma->sc_send_ctxts); + spin_unlock(&rdma->sc_send_lock); if (!node) goto out_empty; + ctxt = llist_entry(node, struct svc_rdma_send_ctxt, sc_node); - spin_unlock(&rdma->sc_send_lock); out: rpcrdma_set_xdrlen(&ctxt->sc_hdrbuf, 0); @@ -216,22 +211,14 @@ out: return ctxt; out_empty: - spin_unlock(&rdma->sc_send_lock); ctxt = svc_rdma_send_ctxt_alloc(rdma); if (!ctxt) return NULL; goto out; } -/** - * svc_rdma_send_ctxt_put - Return send_ctxt to free list - * @rdma: controlling svcxprt_rdma - * @ctxt: object to return to the free list - * - * Pages left in sc_pages are DMA unmapped and released. - */ -void svc_rdma_send_ctxt_put(struct svcxprt_rdma *rdma, - struct svc_rdma_send_ctxt *ctxt) +static void svc_rdma_send_ctxt_release(struct svcxprt_rdma *rdma, + struct svc_rdma_send_ctxt *ctxt) { struct ib_device *device = rdma->sc_cm_id->device; unsigned int i; @@ -243,18 +230,40 @@ void svc_rdma_send_ctxt_put(struct svcxprt_rdma *rdma, * remains mapped until @ctxt is destroyed. */ for (i = 1; i < ctxt->sc_send_wr.num_sge; i++) { + trace_svcrdma_dma_unmap_page(&ctxt->sc_cid, + ctxt->sc_sges[i].addr, + ctxt->sc_sges[i].length); ib_dma_unmap_page(device, ctxt->sc_sges[i].addr, ctxt->sc_sges[i].length, DMA_TO_DEVICE); - trace_svcrdma_dma_unmap_page(rdma, - ctxt->sc_sges[i].addr, - ctxt->sc_sges[i].length); } llist_add(&ctxt->sc_node, &rdma->sc_send_ctxts); } +static void svc_rdma_send_ctxt_put_async(struct work_struct *work) +{ + struct svc_rdma_send_ctxt *ctxt; + + ctxt = container_of(work, struct svc_rdma_send_ctxt, sc_work); + svc_rdma_send_ctxt_release(ctxt->sc_rdma, ctxt); +} + +/** + * svc_rdma_send_ctxt_put - Return send_ctxt to free list + * @rdma: controlling svcxprt_rdma + * @ctxt: object to return to the free list + * + * Pages left in sc_pages are DMA unmapped and released. + */ +void svc_rdma_send_ctxt_put(struct svcxprt_rdma *rdma, + struct svc_rdma_send_ctxt *ctxt) +{ + INIT_WORK(&ctxt->sc_work, svc_rdma_send_ctxt_put_async); + queue_work(svcrdma_wq, &ctxt->sc_work); +} + /** * svc_rdma_wake_send_waiters - manage Send Queue accounting * @rdma: controlling transport @@ -289,7 +298,7 @@ static void svc_rdma_wc_send(struct ib_cq *cq, struct ib_wc *wc) if (unlikely(wc->status != IB_WC_SUCCESS)) goto flushed; - trace_svcrdma_wc_send(wc, &ctxt->sc_cid); + trace_svcrdma_wc_send(&ctxt->sc_cid); svc_rdma_send_ctxt_put(rdma, ctxt); return; @@ -327,13 +336,13 @@ int svc_rdma_send(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *ctxt) while (1) { if ((atomic_dec_return(&rdma->sc_sq_avail) < 0)) { percpu_counter_inc(&svcrdma_stat_sq_starve); - trace_svcrdma_sq_full(rdma); + trace_svcrdma_sq_full(rdma, &ctxt->sc_cid); atomic_inc(&rdma->sc_sq_avail); wait_event(rdma->sc_send_wait, atomic_read(&rdma->sc_sq_avail) > 1); if (test_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags)) return -ENOTCONN; - trace_svcrdma_sq_retry(rdma); + trace_svcrdma_sq_retry(rdma, &ctxt->sc_cid); continue; } @@ -344,7 +353,7 @@ int svc_rdma_send(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *ctxt) return 0; } - trace_svcrdma_sq_post_err(rdma, ret); + trace_svcrdma_sq_post_err(rdma, &ctxt->sc_cid, ret); svc_xprt_deferred_close(&rdma->sc_xprt); wake_up(&rdma->sc_send_wait); return ret; @@ -534,14 +543,14 @@ static int svc_rdma_page_dma_map(void *data, struct page *page, if (ib_dma_mapping_error(dev, dma_addr)) goto out_maperr; - trace_svcrdma_dma_map_page(rdma, dma_addr, len); + trace_svcrdma_dma_map_page(&ctxt->sc_cid, dma_addr, len); ctxt->sc_sges[ctxt->sc_cur_sge_no].addr = dma_addr; ctxt->sc_sges[ctxt->sc_cur_sge_no].length = len; ctxt->sc_send_wr.num_sge++; return 0; out_maperr: - trace_svcrdma_dma_map_err(rdma, dma_addr, len); + trace_svcrdma_dma_map_err(&ctxt->sc_cid, dma_addr, len); return -EIO; } @@ -653,7 +662,7 @@ static int svc_rdma_xb_count_sges(const struct xdr_buf *xdr, * svc_rdma_pull_up_needed - Determine whether to use pull-up * @rdma: controlling transport * @sctxt: send_ctxt for the Send WR - * @rctxt: Write and Reply chunks provided by client + * @write_pcl: Write chunk list provided by client * @xdr: xdr_buf containing RPC message to transmit * * Returns: @@ -662,7 +671,7 @@ static int svc_rdma_xb_count_sges(const struct xdr_buf *xdr, */ static bool svc_rdma_pull_up_needed(const struct svcxprt_rdma *rdma, const struct svc_rdma_send_ctxt *sctxt, - const struct svc_rdma_recv_ctxt *rctxt, + const struct svc_rdma_pcl *write_pcl, const struct xdr_buf *xdr) { /* Resources needed for the transport header */ @@ -672,7 +681,7 @@ static bool svc_rdma_pull_up_needed(const struct svcxprt_rdma *rdma, }; int ret; - ret = pcl_process_nonpayloads(&rctxt->rc_write_pcl, xdr, + ret = pcl_process_nonpayloads(write_pcl, xdr, svc_rdma_xb_count_sges, &args); if (ret < 0) return false; @@ -728,7 +737,7 @@ static int svc_rdma_xb_linearize(const struct xdr_buf *xdr, * svc_rdma_pull_up_reply_msg - Copy Reply into a single buffer * @rdma: controlling transport * @sctxt: send_ctxt for the Send WR; xprt hdr is already prepared - * @rctxt: Write and Reply chunks provided by client + * @write_pcl: Write chunk list provided by client * @xdr: prepared xdr_buf containing RPC message * * The device is not capable of sending the reply directly. @@ -743,7 +752,7 @@ static int svc_rdma_xb_linearize(const struct xdr_buf *xdr, */ static int svc_rdma_pull_up_reply_msg(const struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *sctxt, - const struct svc_rdma_recv_ctxt *rctxt, + const struct svc_rdma_pcl *write_pcl, const struct xdr_buf *xdr) { struct svc_rdma_pullup_data args = { @@ -751,7 +760,7 @@ static int svc_rdma_pull_up_reply_msg(const struct svcxprt_rdma *rdma, }; int ret; - ret = pcl_process_nonpayloads(&rctxt->rc_write_pcl, xdr, + ret = pcl_process_nonpayloads(write_pcl, xdr, svc_rdma_xb_linearize, &args); if (ret < 0) return ret; @@ -764,7 +773,8 @@ static int svc_rdma_pull_up_reply_msg(const struct svcxprt_rdma *rdma, /* svc_rdma_map_reply_msg - DMA map the buffer holding RPC message * @rdma: controlling transport * @sctxt: send_ctxt for the Send WR - * @rctxt: Write and Reply chunks provided by client + * @write_pcl: Write chunk list provided by client + * @reply_pcl: Reply chunk provided by client * @xdr: prepared xdr_buf containing RPC message * * Returns: @@ -776,7 +786,8 @@ static int svc_rdma_pull_up_reply_msg(const struct svcxprt_rdma *rdma, */ int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma, struct svc_rdma_send_ctxt *sctxt, - const struct svc_rdma_recv_ctxt *rctxt, + const struct svc_rdma_pcl *write_pcl, + const struct svc_rdma_pcl *reply_pcl, const struct xdr_buf *xdr) { struct svc_rdma_map_data args = { @@ -789,18 +800,18 @@ int svc_rdma_map_reply_msg(struct svcxprt_rdma *rdma, sctxt->sc_sges[0].length = sctxt->sc_hdrbuf.len; /* If there is a Reply chunk, nothing follows the transport - * header, and we're done here. + * header, so there is nothing to map. */ - if (!pcl_is_empty(&rctxt->rc_reply_pcl)) + if (!pcl_is_empty(reply_pcl)) return 0; /* For pull-up, svc_rdma_send() will sync the transport header. * No additional DMA mapping is necessary. */ - if (svc_rdma_pull_up_needed(rdma, sctxt, rctxt, xdr)) - return svc_rdma_pull_up_reply_msg(rdma, sctxt, rctxt, xdr); + if (svc_rdma_pull_up_needed(rdma, sctxt, write_pcl, xdr)) + return svc_rdma_pull_up_reply_msg(rdma, sctxt, write_pcl, xdr); - return pcl_process_nonpayloads(&rctxt->rc_write_pcl, xdr, + return pcl_process_nonpayloads(write_pcl, xdr, svc_rdma_xb_dma_map, &args); } @@ -848,7 +859,8 @@ static int svc_rdma_send_reply_msg(struct svcxprt_rdma *rdma, { int ret; - ret = svc_rdma_map_reply_msg(rdma, sctxt, rctxt, &rqstp->rq_res); + ret = svc_rdma_map_reply_msg(rdma, sctxt, &rctxt->rc_write_pcl, + &rctxt->rc_reply_pcl, &rqstp->rq_res); if (ret < 0) return ret; diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c index 2abd895046ee..4f27325ace4a 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c @@ -125,6 +125,9 @@ static void qp_event_handler(struct ib_event *event, void *context) static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv, struct net *net, int node) { + static struct lock_class_key svcrdma_rwctx_lock; + static struct lock_class_key svcrdma_sctx_lock; + static struct lock_class_key svcrdma_dto_lock; struct svcxprt_rdma *cma_xprt; cma_xprt = kzalloc_node(sizeof(*cma_xprt), GFP_KERNEL, node); @@ -134,6 +137,7 @@ static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv, svc_xprt_init(net, &svc_rdma_class, &cma_xprt->sc_xprt, serv); INIT_LIST_HEAD(&cma_xprt->sc_accept_q); INIT_LIST_HEAD(&cma_xprt->sc_rq_dto_q); + INIT_LIST_HEAD(&cma_xprt->sc_read_complete_q); init_llist_head(&cma_xprt->sc_send_ctxts); init_llist_head(&cma_xprt->sc_recv_ctxts); init_llist_head(&cma_xprt->sc_rw_ctxts); @@ -141,8 +145,11 @@ static struct svcxprt_rdma *svc_rdma_create_xprt(struct svc_serv *serv, spin_lock_init(&cma_xprt->sc_lock); spin_lock_init(&cma_xprt->sc_rq_dto_lock); + lockdep_set_class(&cma_xprt->sc_rq_dto_lock, &svcrdma_dto_lock); spin_lock_init(&cma_xprt->sc_send_lock); + lockdep_set_class(&cma_xprt->sc_send_lock, &svcrdma_sctx_lock); spin_lock_init(&cma_xprt->sc_rw_ctxt_lock); + lockdep_set_class(&cma_xprt->sc_rw_ctxt_lock, &svcrdma_rwctx_lock); /* * Note that this implies that the underlying transport support @@ -391,37 +398,35 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) dev = newxprt->sc_cm_id->device; newxprt->sc_port_num = newxprt->sc_cm_id->port_num; - /* Qualify the transport resource defaults with the - * capabilities of this particular device */ + newxprt->sc_max_req_size = svcrdma_max_req_size; + newxprt->sc_max_requests = svcrdma_max_requests; + newxprt->sc_max_bc_requests = svcrdma_max_bc_requests; + newxprt->sc_recv_batch = RPCRDMA_MAX_RECV_BATCH; + newxprt->sc_fc_credits = cpu_to_be32(newxprt->sc_max_requests); + + /* Qualify the transport's resource defaults with the + * capabilities of this particular device. + */ + /* Transport header, head iovec, tail iovec */ newxprt->sc_max_send_sges = 3; /* Add one SGE per page list entry */ newxprt->sc_max_send_sges += (svcrdma_max_req_size / PAGE_SIZE) + 1; if (newxprt->sc_max_send_sges > dev->attrs.max_send_sge) newxprt->sc_max_send_sges = dev->attrs.max_send_sge; - newxprt->sc_max_req_size = svcrdma_max_req_size; - newxprt->sc_max_requests = svcrdma_max_requests; - newxprt->sc_max_bc_requests = svcrdma_max_bc_requests; - newxprt->sc_recv_batch = RPCRDMA_MAX_RECV_BATCH; rq_depth = newxprt->sc_max_requests + newxprt->sc_max_bc_requests + newxprt->sc_recv_batch; if (rq_depth > dev->attrs.max_qp_wr) { - pr_warn("svcrdma: reducing receive depth to %d\n", - dev->attrs.max_qp_wr); rq_depth = dev->attrs.max_qp_wr; newxprt->sc_recv_batch = 1; newxprt->sc_max_requests = rq_depth - 2; newxprt->sc_max_bc_requests = 2; } - newxprt->sc_fc_credits = cpu_to_be32(newxprt->sc_max_requests); ctxts = rdma_rw_mr_factor(dev, newxprt->sc_port_num, RPCSVC_MAXPAGES); ctxts *= newxprt->sc_max_requests; newxprt->sc_sq_depth = rq_depth + ctxts; - if (newxprt->sc_sq_depth > dev->attrs.max_qp_wr) { - pr_warn("svcrdma: reducing send depth to %d\n", - dev->attrs.max_qp_wr); + if (newxprt->sc_sq_depth > dev->attrs.max_qp_wr) newxprt->sc_sq_depth = dev->attrs.max_qp_wr; - } atomic_set(&newxprt->sc_sq_avail, newxprt->sc_sq_depth); newxprt->sc_pd = ib_alloc_pd(dev, 0); @@ -451,8 +456,6 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) qp_attr.qp_type = IB_QPT_RC; qp_attr.send_cq = newxprt->sc_sq_cq; qp_attr.recv_cq = newxprt->sc_rq_cq; - dprintk("svcrdma: newxprt->sc_cm_id=%p, newxprt->sc_pd=%p\n", - newxprt->sc_cm_id, newxprt->sc_pd); dprintk(" cap.max_send_wr = %d, cap.max_recv_wr = %d\n", qp_attr.cap.max_send_wr, qp_attr.cap.max_recv_wr); dprintk(" cap.max_send_sge = %d, cap.max_recv_sge = %d\n", @@ -506,7 +509,7 @@ static struct svc_xprt *svc_rdma_accept(struct svc_xprt *xprt) } #if IS_ENABLED(CONFIG_SUNRPC_DEBUG) - dprintk("svcrdma: new connection %p accepted:\n", newxprt); + dprintk("svcrdma: new connection accepted on device %s:\n", dev->name); sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.src_addr; dprintk(" local address : %pIS:%u\n", sap, rpc_get_port(sap)); sap = (struct sockaddr *)&newxprt->sc_cm_id->route.addr.dst_addr; @@ -547,6 +550,7 @@ static void __svc_rdma_free(struct work_struct *work) /* This blocks until the Completion Queues are empty */ if (rdma->sc_qp && !IS_ERR(rdma->sc_qp)) ib_drain_qp(rdma->sc_qp); + flush_workqueue(svcrdma_wq); svc_rdma_flush_recv_queues(rdma); diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c index 28c0771c4e8c..4f8d7efa469f 100644 --- a/net/sunrpc/xprtrdma/verbs.c +++ b/net/sunrpc/xprtrdma/verbs.c @@ -1364,7 +1364,7 @@ void rpcrdma_post_recvs(struct rpcrdma_xprt *r_xprt, int needed, bool temp) } rep->rr_cid.ci_queue_id = ep->re_attr.recv_cq->res.id; - trace_xprtrdma_post_recv(rep); + trace_xprtrdma_post_recv(&rep->rr_cid); rep->rr_recv_wr.next = wr; wr = &rep->rr_recv_wr; --needed; |