diff options
Diffstat (limited to 'net')
45 files changed, 1465 insertions, 356 deletions
diff --git a/net/ax25/ax25_in.c b/net/ax25/ax25_in.c index 5f1d2107a1d..de56d3983de 100644 --- a/net/ax25/ax25_in.c +++ b/net/ax25/ax25_in.c @@ -437,8 +437,7 @@ free: int ax25_kiss_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *ptype, struct net_device *orig_dev) { - skb->sk = NULL; /* Initially we don't know who it's for */ - skb->destructor = NULL; /* Who initializes this, dammit?! */ + skb_orphan(skb); if (!net_eq(dev_net(dev), &init_net)) { kfree_skb(skb); diff --git a/net/core/dev.c b/net/core/dev.c index baf2dc13a34..60b57281227 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2310,8 +2310,6 @@ ncls: if (!skb) goto out; - skb_orphan(skb); - type = skb->protocol; list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type) & PTYPE_HASH_MASK], list) { diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index 05ea7440d9e..3e70faab298 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -85,7 +85,7 @@ static inline __u32 dccp_v6_init_sequence(struct sk_buff *skb) } static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { struct ipv6hdr *hdr = (struct ipv6hdr *)skb->data; const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset); diff --git a/net/ieee802154/af_ieee802154.c b/net/ieee802154/af_ieee802154.c index 882a927cefa..3bb6bdb1dac 100644 --- a/net/ieee802154/af_ieee802154.c +++ b/net/ieee802154/af_ieee802154.c @@ -39,14 +39,6 @@ #include "af802154.h" -#define DBG_DUMP(data, len) { \ - int i; \ - pr_debug("function: %s: data: len %d:\n", __func__, len); \ - for (i = 0; i < len; i++) {\ - pr_debug("%02x: %02x\n", i, (data)[i]); \ - } \ -} - /* * Utility function for families */ @@ -302,10 +294,12 @@ static struct net_proto_family ieee802154_family_ops = { static int ieee802154_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { - DBG_DUMP(skb->data, skb->len); if (!netif_running(dev)) return -ENODEV; pr_debug("got frame, type %d, dev %p\n", dev->type, dev); +#ifdef DEBUG + print_hex_dump_bytes("ieee802154_rcv ", DUMP_PREFIX_NONE, skb->data, skb->len); +#endif if (!net_eq(dev_net(dev), &init_net)) goto drop; diff --git a/net/ipv4/route.c b/net/ipv4/route.c index cd76b3cb709..278f46f5011 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1085,8 +1085,35 @@ restart: now = jiffies; if (!rt_caching(dev_net(rt->u.dst.dev))) { - rt_drop(rt); - return 0; + /* + * If we're not caching, just tell the caller we + * were successful and don't touch the route. The + * caller hold the sole reference to the cache entry, and + * it will be released when the caller is done with it. + * If we drop it here, the callers have no way to resolve routes + * when we're not caching. Instead, just point *rp at rt, so + * the caller gets a single use out of the route + * Note that we do rt_free on this new route entry, so that + * once its refcount hits zero, we are still able to reap it + * (Thanks Alexey) + * Note also the rt_free uses call_rcu. We don't actually + * need rcu protection here, this is just our path to get + * on the route gc list. + */ + + if (rt->rt_type == RTN_UNICAST || rt->fl.iif == 0) { + int err = arp_bind_neighbour(&rt->u.dst); + if (err) { + if (net_ratelimit()) + printk(KERN_WARNING + "Neighbour table failure & not caching routes.\n"); + rt_drop(rt); + return err; + } + } + + rt_free(rt); + goto skip_hashing; } rthp = &rt_hash_table[hash].chain; @@ -1203,7 +1230,8 @@ restart: #if RT_CACHE_DEBUG >= 2 if (rt->u.dst.rt_next) { struct rtable *trt; - printk(KERN_DEBUG "rt_cache @%02x: %pI4", hash, &rt->rt_dst); + printk(KERN_DEBUG "rt_cache @%02x: %pI4", + hash, &rt->rt_dst); for (trt = rt->u.dst.rt_next; trt; trt = trt->u.dst.rt_next) printk(" . %pI4", &trt->rt_dst); printk("\n"); @@ -1217,6 +1245,8 @@ restart: rcu_assign_pointer(rt_hash_table[hash].chain, rt); spin_unlock_bh(rt_hash_lock_addr(hash)); + +skip_hashing: if (rp) *rp = rt; else diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c index 52449f7a1b7..86f42a288c4 100644 --- a/net/ipv6/ah6.c +++ b/net/ipv6/ah6.c @@ -405,7 +405,7 @@ out: } static void ah6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { struct net *net = dev_net(skb->dev); struct ipv6hdr *iph = (struct ipv6hdr*)skb->data; diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index c2f250150db..678bb95b152 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -354,7 +354,7 @@ static u32 esp6_get_mtu(struct xfrm_state *x, int mtu) } static void esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { struct net *net = dev_net(skb->dev); struct ipv6hdr *iph = (struct ipv6hdr*)skb->data; diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 36dff880718..eab62a7a8f0 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -117,7 +117,7 @@ static __inline__ void icmpv6_xmit_unlock(struct sock *sk) /* * Slightly more convenient version of icmpv6_send. */ -void icmpv6_param_prob(struct sk_buff *skb, int code, int pos) +void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos) { icmpv6_send(skb, ICMPV6_PARAMPROB, code, pos, skb->dev); kfree_skb(skb); @@ -161,7 +161,7 @@ static int is_ineligible(struct sk_buff *skb) /* * Check the ICMP output rate limit */ -static inline int icmpv6_xrlim_allow(struct sock *sk, int type, +static inline int icmpv6_xrlim_allow(struct sock *sk, u8 type, struct flowi *fl) { struct dst_entry *dst; @@ -305,7 +305,7 @@ static inline void mip6_addr_swap(struct sk_buff *skb) {} /* * Send an ICMP message in response to a packet in error */ -void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info, +void icmpv6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info, struct net_device *dev) { struct net *net = dev_net(skb->dev); @@ -590,7 +590,7 @@ out: icmpv6_xmit_unlock(sk); } -static void icmpv6_notify(struct sk_buff *skb, int type, int code, __be32 info) +static void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info) { struct inet6_protocol *ipprot; int inner_offset; @@ -643,7 +643,7 @@ static int icmpv6_rcv(struct sk_buff *skb) struct in6_addr *saddr, *daddr; struct ipv6hdr *orig_hdr; struct icmp6hdr *hdr; - int type; + u8 type; if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) { struct sec_path *sp = skb_sec_path(skb); @@ -914,7 +914,7 @@ static const struct icmp6_err { }, }; -int icmpv6_err_convert(int type, int code, int *err) +int icmpv6_err_convert(u8 type, u8 code, int *err) { int fatal = 0; diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 404d16a97d5..51f410e7775 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -394,13 +394,13 @@ parse_tlv_tnl_enc_lim(struct sk_buff *skb, __u8 * raw) static int ip6_tnl_err(struct sk_buff *skb, __u8 ipproto, struct inet6_skb_parm *opt, - int *type, int *code, int *msg, __u32 *info, int offset) + u8 *type, u8 *code, int *msg, __u32 *info, int offset) { struct ipv6hdr *ipv6h = (struct ipv6hdr *) skb->data; struct ip6_tnl *t; int rel_msg = 0; - int rel_type = ICMPV6_DEST_UNREACH; - int rel_code = ICMPV6_ADDR_UNREACH; + u8 rel_type = ICMPV6_DEST_UNREACH; + u8 rel_code = ICMPV6_ADDR_UNREACH; __u32 rel_info = 0; __u16 len; int err = -ENOENT; @@ -488,11 +488,11 @@ out: static int ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { int rel_msg = 0; - int rel_type = type; - int rel_code = code; + u8 rel_type = type; + u8 rel_code = code; __u32 rel_info = ntohl(info); int err; struct sk_buff *skb2; @@ -586,11 +586,11 @@ out: static int ip6ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { int rel_msg = 0; - int rel_type = type; - int rel_code = code; + u8 rel_type = type; + u8 rel_code = code; __u32 rel_info = ntohl(info); int err; diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c index 3a0b3be7ece..79c172f1ff0 100644 --- a/net/ipv6/ipcomp6.c +++ b/net/ipv6/ipcomp6.c @@ -51,7 +51,7 @@ #include <linux/mutex.h> static void ipcomp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { __be32 spi; struct ipv6hdr *iph = (struct ipv6hdr*)skb->data; diff --git a/net/ipv6/mip6.c b/net/ipv6/mip6.c index f995e19c87a..f797e8c6f3b 100644 --- a/net/ipv6/mip6.c +++ b/net/ipv6/mip6.c @@ -54,7 +54,7 @@ static inline void *mip6_padn(__u8 *data, __u8 padlen) return data + padlen; } -static inline void mip6_param_prob(struct sk_buff *skb, int code, int pos) +static inline void mip6_param_prob(struct sk_buff *skb, u8 code, int pos) { icmpv6_send(skb, ICMPV6_PARAMPROB, code, pos, skb->dev); } diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c index 8b0b6f94806..d6c3c1c34b2 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -310,7 +310,7 @@ out: static void rawv6_err(struct sock *sk, struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { struct inet_sock *inet = inet_sk(sk); struct ipv6_pinfo *np = inet6_sk(sk); @@ -343,7 +343,7 @@ static void rawv6_err(struct sock *sk, struct sk_buff *skb, } void raw6_icmp_error(struct sk_buff *skb, int nexthdr, - int type, int code, int inner_offset, __be32 info) + u8 type, u8 code, int inner_offset, __be32 info) { struct sock *sk; int hash; diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 658293ea05b..1473ee0a1f5 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -1865,7 +1865,7 @@ int ipv6_route_ioctl(struct net *net, unsigned int cmd, void __user *arg) * Drop the packet on the floor */ -static int ip6_pkt_drop(struct sk_buff *skb, int code, int ipstats_mib_noroutes) +static int ip6_pkt_drop(struct sk_buff *skb, u8 code, int ipstats_mib_noroutes) { int type; struct dst_entry *dst = skb_dst(skb); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 53b6a4192b1..58810c65b63 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -317,7 +317,7 @@ failure: } static void tcp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { struct ipv6hdr *hdr = (struct ipv6hdr*)skb->data; const struct tcphdr *th = (struct tcphdr *)(skb->data+offset); diff --git a/net/ipv6/tunnel6.c b/net/ipv6/tunnel6.c index 669f280989c..633ad789eff 100644 --- a/net/ipv6/tunnel6.c +++ b/net/ipv6/tunnel6.c @@ -124,7 +124,7 @@ drop: } static void tunnel6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { struct xfrm6_tunnel *handler; diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 023beda6b22..33b59bd92c4 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -312,7 +312,7 @@ csum_copy_err: } void __udp6_lib_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info, + u8 type, u8 code, int offset, __be32 info, struct udp_table *udptable) { struct ipv6_pinfo *np; @@ -346,8 +346,8 @@ out: } static __inline__ void udpv6_err(struct sk_buff *skb, - struct inet6_skb_parm *opt, int type, - int code, int offset, __be32 info ) + struct inet6_skb_parm *opt, u8 type, + u8 code, int offset, __be32 info ) { __udp6_lib_err(skb, opt, type, code, offset, info, &udp_table); } diff --git a/net/ipv6/udp_impl.h b/net/ipv6/udp_impl.h index 23779208c33..6bb303471e2 100644 --- a/net/ipv6/udp_impl.h +++ b/net/ipv6/udp_impl.h @@ -9,7 +9,7 @@ extern int __udp6_lib_rcv(struct sk_buff *, struct udp_table *, int ); extern void __udp6_lib_err(struct sk_buff *, struct inet6_skb_parm *, - int , int , int , __be32 , struct udp_table *); + u8 , u8 , int , __be32 , struct udp_table *); extern int udp_v6_get_port(struct sock *sk, unsigned short snum); diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c index ba162a82458..4818c48688f 100644 --- a/net/ipv6/udplite.c +++ b/net/ipv6/udplite.c @@ -20,7 +20,7 @@ static int udplitev6_rcv(struct sk_buff *skb) static void udplitev6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { __udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table); } diff --git a/net/ipv6/xfrm6_tunnel.c b/net/ipv6/xfrm6_tunnel.c index 80193db224d..81a95c00e50 100644 --- a/net/ipv6/xfrm6_tunnel.c +++ b/net/ipv6/xfrm6_tunnel.c @@ -262,7 +262,7 @@ static int xfrm6_tunnel_rcv(struct sk_buff *skb) } static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { /* xfrm6_tunnel native err handling */ switch (type) { diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c index 5922febe25c..cb762c8723e 100644 --- a/net/irda/af_irda.c +++ b/net/irda/af_irda.c @@ -913,9 +913,6 @@ static int irda_accept(struct socket *sock, struct socket *newsock, int flags) /* Clean up the original one to keep it in listen state */ irttp_listen(self->tsap); - /* Wow ! What is that ? Jean II */ - skb->sk = NULL; - skb->destructor = NULL; kfree_skb(skb); sk->sk_ack_backlog--; diff --git a/net/irda/ircomm/ircomm_lmp.c b/net/irda/ircomm/ircomm_lmp.c index 67c99d20857..7ba96618660 100644 --- a/net/irda/ircomm/ircomm_lmp.c +++ b/net/irda/ircomm/ircomm_lmp.c @@ -196,6 +196,7 @@ static int ircomm_lmp_data_request(struct ircomm_cb *self, /* Don't forget to refcount it - see ircomm_tty_do_softint() */ skb_get(skb); + skb_orphan(skb); skb->destructor = ircomm_lmp_flow_control; if ((self->pkt_count++ > 7) && (self->flow_status == FLOW_START)) { diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c index 656cbd19582..6be5f92d109 100644 --- a/net/iucv/af_iucv.c +++ b/net/iucv/af_iucv.c @@ -54,6 +54,38 @@ static const u8 iprm_shutdown[8] = #define CB_TRGCLS(skb) ((skb)->cb + CB_TAG_LEN) /* iucv msg target class */ #define CB_TRGCLS_LEN (TRGCLS_SIZE) +#define __iucv_sock_wait(sk, condition, timeo, ret) \ +do { \ + DEFINE_WAIT(__wait); \ + long __timeo = timeo; \ + ret = 0; \ + while (!(condition)) { \ + prepare_to_wait(sk->sk_sleep, &__wait, TASK_INTERRUPTIBLE); \ + if (!__timeo) { \ + ret = -EAGAIN; \ + break; \ + } \ + if (signal_pending(current)) { \ + ret = sock_intr_errno(__timeo); \ + break; \ + } \ + release_sock(sk); \ + __timeo = schedule_timeout(__timeo); \ + lock_sock(sk); \ + ret = sock_error(sk); \ + if (ret) \ + break; \ + } \ + finish_wait(sk->sk_sleep, &__wait); \ +} while (0) + +#define iucv_sock_wait(sk, condition, timeo) \ +({ \ + int __ret = 0; \ + if (!(condition)) \ + __iucv_sock_wait(sk, condition, timeo, __ret); \ + __ret; \ +}) static void iucv_sock_kill(struct sock *sk); static void iucv_sock_close(struct sock *sk); @@ -238,6 +270,48 @@ static inline size_t iucv_msg_length(struct iucv_message *msg) return msg->length; } +/** + * iucv_sock_in_state() - check for specific states + * @sk: sock structure + * @state: first iucv sk state + * @state: second iucv sk state + * + * Returns true if the socket in either in the first or second state. + */ +static int iucv_sock_in_state(struct sock *sk, int state, int state2) +{ + return (sk->sk_state == state || sk->sk_state == state2); +} + +/** + * iucv_below_msglim() - function to check if messages can be sent + * @sk: sock structure + * + * Returns true if the send queue length is lower than the message limit. + * Always returns true if the socket is not connected (no iucv path for + * checking the message limit). + */ +static inline int iucv_below_msglim(struct sock *sk) +{ + struct iucv_sock *iucv = iucv_sk(sk); + + if (sk->sk_state != IUCV_CONNECTED) + return 1; + return (skb_queue_len(&iucv->send_skb_q) < iucv->path->msglim); +} + +/** + * iucv_sock_wake_msglim() - Wake up thread waiting on msg limit + */ +static void iucv_sock_wake_msglim(struct sock *sk) +{ + read_lock(&sk->sk_callback_lock); + if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) + wake_up_interruptible_all(sk->sk_sleep); + sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); + read_unlock(&sk->sk_callback_lock); +} + /* Timers */ static void iucv_sock_timeout(unsigned long arg) { @@ -329,7 +403,9 @@ static void iucv_sock_close(struct sock *sk) timeo = sk->sk_lingertime; else timeo = IUCV_DISCONN_TIMEOUT; - err = iucv_sock_wait_state(sk, IUCV_CLOSED, 0, timeo); + err = iucv_sock_wait(sk, + iucv_sock_in_state(sk, IUCV_CLOSED, 0), + timeo); } case IUCV_CLOSING: /* fall through */ @@ -510,39 +586,6 @@ struct sock *iucv_accept_dequeue(struct sock *parent, struct socket *newsock) return NULL; } -int iucv_sock_wait_state(struct sock *sk, int state, int state2, - unsigned long timeo) -{ - DECLARE_WAITQUEUE(wait, current); - int err = 0; - - add_wait_queue(sk->sk_sleep, &wait); - while (sk->sk_state != state && sk->sk_state != state2) { - set_current_state(TASK_INTERRUPTIBLE); - - if (!timeo) { - err = -EAGAIN; - break; - } - - if (signal_pending(current)) { - err = sock_intr_errno(timeo); - break; - } - - release_sock(sk); - timeo = schedule_timeout(timeo); - lock_sock(sk); - - err = sock_error(sk); - if (err) - break; - } - set_current_state(TASK_RUNNING); - remove_wait_queue(sk->sk_sleep, &wait); - return err; -} - /* Bind an unbound socket */ static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len) @@ -687,8 +730,9 @@ static int iucv_sock_connect(struct socket *sock, struct sockaddr *addr, } if (sk->sk_state != IUCV_CONNECTED) { - err = iucv_sock_wait_state(sk, IUCV_CONNECTED, IUCV_DISCONN, - sock_sndtimeo(sk, flags & O_NONBLOCK)); + err = iucv_sock_wait(sk, iucv_sock_in_state(sk, IUCV_CONNECTED, + IUCV_DISCONN), + sock_sndtimeo(sk, flags & O_NONBLOCK)); } if (sk->sk_state == IUCV_DISCONN) { @@ -842,9 +886,11 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct iucv_message txmsg; struct cmsghdr *cmsg; int cmsg_done; + long timeo; char user_id[9]; char appl_id[9]; int err; + int noblock = msg->msg_flags & MSG_DONTWAIT; err = sock_error(sk); if (err) @@ -864,108 +910,119 @@ static int iucv_sock_sendmsg(struct kiocb *iocb, struct socket *sock, goto out; } - if (sk->sk_state == IUCV_CONNECTED) { - /* initialize defaults */ - cmsg_done = 0; /* check for duplicate headers */ - txmsg.class = 0; + /* Return if the socket is not in connected state */ + if (sk->sk_state != IUCV_CONNECTED) { + err = -ENOTCONN; + goto out; + } - /* iterate over control messages */ - for (cmsg = CMSG_FIRSTHDR(msg); cmsg; - cmsg = CMSG_NXTHDR(msg, cmsg)) { + /* initialize defaults */ + cmsg_done = 0; /* check for duplicate headers */ + txmsg.class = 0; - if (!CMSG_OK(msg, cmsg)) { - err = -EINVAL; - goto out; - } + /* iterate over control messages */ + for (cmsg = CMSG_FIRSTHDR(msg); cmsg; + cmsg = CMSG_NXTHDR(msg, cmsg)) { + + if (!CMSG_OK(msg, cmsg)) { + err = -EINVAL; + goto out; + } + + if (cmsg->cmsg_level != SOL_IUCV) + continue; - if (cmsg->cmsg_level != SOL_IUCV) - continue; + if (cmsg->cmsg_type & cmsg_done) { + err = -EINVAL; + goto out; + } + cmsg_done |= cmsg->cmsg_type; - if (cmsg->cmsg_type & cmsg_done) { + switch (cmsg->cmsg_type) { + case SCM_IUCV_TRGCLS: + if (cmsg->cmsg_len != CMSG_LEN(TRGCLS_SIZE)) { err = -EINVAL; goto out; } - cmsg_done |= cmsg->cmsg_type; - - switch (cmsg->cmsg_type) { - case SCM_IUCV_TRGCLS: - if (cmsg->cmsg_len != CMSG_LEN(TRGCLS_SIZE)) { - err = -EINVAL; - goto out; - } - /* set iucv message target class */ - memcpy(&txmsg.class, - (void *) CMSG_DATA(cmsg), TRGCLS_SIZE); + /* set iucv message target class */ + memcpy(&txmsg.class, + (void *) CMSG_DATA(cmsg), TRGCLS_SIZE); - break; + break; - default: - err = -EINVAL; - goto out; - break; - } + default: + err = -EINVAL; + goto out; + break; } + } - /* allocate one skb for each iucv message: - * this is fine for SOCK_SEQPACKET (unless we want to support - * segmented records using the MSG_EOR flag), but - * for SOCK_STREAM we might want to improve it in future */ - if (!(skb = sock_alloc_send_skb(sk, len, - msg->msg_flags & MSG_DONTWAIT, - &err))) - goto out; + /* allocate one skb for each iucv message: + * this is fine for SOCK_SEQPACKET (unless we want to support + * segmented records using the MSG_EOR flag), but + * for SOCK_STREAM we might want to improve it in future */ + skb = sock_alloc_send_skb(sk, len, noblock, &err); + if (!skb) + goto out; + if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { + err = -EFAULT; + goto fail; + } - if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) { - err = -EFAULT; - goto fail; - } + /* wait if outstanding messages for iucv path has reached */ + timeo = sock_sndtimeo(sk, noblock); + err = iucv_sock_wait(sk, iucv_below_msglim(sk), timeo); + if (err) + goto fail; - /* increment and save iucv message tag for msg_completion cbk */ - txmsg.tag = iucv->send_tag++; - memcpy(CB_TAG(skb), &txmsg.tag, CB_TAG_LEN); - skb_queue_tail(&iucv->send_skb_q, skb); + /* return -ECONNRESET if the socket is no longer connected */ + if (sk->sk_state != IUCV_CONNECTED) { + err = -ECONNRESET; + goto fail; + } - if (((iucv->path->flags & IUCV_IPRMDATA) & iucv->flags) - && skb->len <= 7) { - err = iucv_send_iprm(iucv->path, &txmsg, skb); + /* increment and save iucv message tag for msg_completion cbk */ + txmsg.tag = iucv->send_tag++; + memcpy(CB_TAG(skb), &txmsg.tag, CB_TAG_LEN); + skb_queue_tail(&iucv->send_skb_q, skb); - /* on success: there is no message_complete callback - * for an IPRMDATA msg; remove skb from send queue */ - if (err == 0) { - skb_unlink(skb, &iucv->send_skb_q); - kfree_skb(skb); - } + if (((iucv->path->flags & IUCV_IPRMDATA) & iucv->flags) + && skb->len <= 7) { + err = iucv_send_iprm(iucv->path, &txmsg, skb); - /* this error should never happen since the - * IUCV_IPRMDATA path flag is set... sever path */ - if (err == 0x15) { - iucv_path_sever(iucv->path, NULL); - skb_unlink(skb, &iucv->send_skb_q); - err = -EPIPE; - goto fail; - } - } else - err = iucv_message_send(iucv->path, &txmsg, 0, 0, - (void *) skb->data, skb->len); - if (err) { - if (err == 3) { - user_id[8] = 0; - memcpy(user_id, iucv->dst_user_id, 8); - appl_id[8] = 0; - memcpy(appl_id, iucv->dst_name, 8); - pr_err("Application %s on z/VM guest %s" - " exceeds message limit\n", - user_id, appl_id); - } + /* on success: there is no message_complete callback + * for an IPRMDATA msg; remove skb from send queue */ + if (err == 0) { + skb_unlink(skb, &iucv->send_skb_q); + kfree_skb(skb); + } + + /* this error should never happen since the + * IUCV_IPRMDATA path flag is set... sever path */ + if (err == 0x15) { + iucv_path_sever(iucv->path, NULL); skb_unlink(skb, &iucv->send_skb_q); err = -EPIPE; goto fail; } - - } else { - err = -ENOTCONN; - goto out; + } else + err = iucv_message_send(iucv->path, &txmsg, 0, 0, + (void *) skb->data, skb->len); + if (err) { + if (err == 3) { + user_id[8] = 0; + memcpy(user_id, iucv->dst_user_id, 8); + appl_id[8] = 0; + memcpy(appl_id, iucv->dst_name, 8); + pr_err("Application %s on z/VM guest %s" + " exceeds message limit\n", + appl_id, user_id); + err = -EAGAIN; + } else + err = -EPIPE; + skb_unlink(skb, &iucv->send_skb_q); + goto fail; } release_sock(sk); @@ -1581,7 +1638,11 @@ static void iucv_callback_txdone(struct iucv_path *path, spin_unlock_irqrestore(&list->lock, flags); - kfree_skb(this); + if (this) { + kfree_skb(this); + /* wake up any process waiting for sending */ + iucv_sock_wake_msglim(sk); + } } BUG_ON(!this); diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 5f72b94b491..7508f11c5b3 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -335,7 +335,8 @@ begin: h = __nf_conntrack_find(net, tuple); if (h) { ct = nf_ct_tuplehash_to_ctrack(h); - if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) + if (unlikely(nf_ct_is_dying(ct) || + !atomic_inc_not_zero(&ct->ct_general.use))) h = NULL; else { if (unlikely(!nf_ct_tuple_equal(tuple, &h->tuple))) { @@ -425,7 +426,6 @@ __nf_conntrack_confirm(struct sk_buff *skb) /* Remove from unconfirmed list */ hlist_nulls_del_rcu(&ct->tuplehash[IP_CT_DIR_ORIGINAL].hnnode); - __nf_conntrack_hash_insert(ct, hash, repl_hash); /* Timer relative to confirmation time, not original setting time, otherwise we'd get timer wrap in weird delay cases. */ @@ -433,8 +433,16 @@ __nf_conntrack_confirm(struct sk_buff *skb) add_timer(&ct->timeout); atomic_inc(&ct->ct_general.use); set_bit(IPS_CONFIRMED_BIT, &ct->status); + + /* Since the lookup is lockless, hash insertion must be done after + * starting the timer and setting the CONFIRMED bit. The RCU barriers + * guarantee that no other CPU can find the conntrack before the above + * stores are visible. + */ + __nf_conntrack_hash_insert(ct, hash, repl_hash); NF_CT_STAT_INC(net, insert); spin_unlock_bh(&nf_conntrack_lock); + help = nfct_help(ct); if (help && help->helper) nf_conntrack_event_cache(IPCT_HELPER, ct); @@ -503,7 +511,8 @@ static noinline int early_drop(struct net *net, unsigned int hash) cnt++; } - if (ct && unlikely(!atomic_inc_not_zero(&ct->ct_general.use))) + if (ct && unlikely(nf_ct_is_dying(ct) || + !atomic_inc_not_zero(&ct->ct_general.use))) ct = NULL; if (ct || cnt >= NF_CT_EVICTION_RANGE) break; @@ -1267,13 +1276,19 @@ err_cache: return ret; } +/* + * We need to use special "null" values, not used in hash table + */ +#define UNCONFIRMED_NULLS_VAL ((1<<30)+0) +#define DYING_NULLS_VAL ((1<<30)+1) + static int nf_conntrack_init_net(struct net *net) { int ret; atomic_set(&net->ct.count, 0); - INIT_HLIST_NULLS_HEAD(&net->ct.unconfirmed, 0); - INIT_HLIST_NULLS_HEAD(&net->ct.dying, 0); + INIT_HLIST_NULLS_HEAD(&net->ct.unconfirmed, UNCONFIRMED_NULLS_VAL); + INIT_HLIST_NULLS_HEAD(&net->ct.dying, DYING_NULLS_VAL); net->ct.stat = alloc_percpu(struct ip_conntrack_stat); if (!net->ct.stat) { ret = -ENOMEM; diff --git a/net/netfilter/nf_log.c b/net/netfilter/nf_log.c index 2fefe147750..4e620305f28 100644 --- a/net/netfilter/nf_log.c +++ b/net/netfilter/nf_log.c @@ -47,7 +47,6 @@ int nf_log_register(u_int8_t pf, struct nf_logger *logger) mutex_lock(&nf_log_mutex); if (pf == NFPROTO_UNSPEC) { - int i; for (i = NFPROTO_UNSPEC; i < NFPROTO_NUMPROTO; i++) list_add_tail(&(logger->list[i]), &(nf_loggers_l[i])); } else { @@ -216,7 +215,7 @@ static const struct file_operations nflog_file_ops = { #endif /* PROC_FS */ #ifdef CONFIG_SYSCTL -struct ctl_path nf_log_sysctl_path[] = { +static struct ctl_path nf_log_sysctl_path[] = { { .procname = "net", .ctl_name = CTL_NET, }, { .procname = "netfilter", .ctl_name = NET_NETFILTER, }, { .procname = "nf_log", .ctl_name = CTL_UNNUMBERED, }, @@ -228,19 +227,26 @@ static struct ctl_table nf_log_sysctl_table[NFPROTO_NUMPROTO+1]; static struct ctl_table_header *nf_log_dir_header; static int nf_log_proc_dostring(ctl_table *table, int write, struct file *filp, - void *buffer, size_t *lenp, loff_t *ppos) + void __user *buffer, size_t *lenp, loff_t *ppos) { const struct nf_logger *logger; + char buf[NFLOGGER_NAME_LEN]; + size_t size = *lenp; int r = 0; int tindex = (unsigned long)table->extra1; if (write) { - if (!strcmp(buffer, "NONE")) { + if (size > sizeof(buf)) + size = sizeof(buf); + if (copy_from_user(buf, buffer, size)) + return -EFAULT; + + if (!strcmp(buf, "NONE")) { nf_log_unbind_pf(tindex); return 0; } mutex_lock(&nf_log_mutex); - logger = __find_logger(tindex, buffer); + logger = __find_logger(tindex, buf); if (logger == NULL) { mutex_unlock(&nf_log_mutex); return -ENOENT; diff --git a/net/netfilter/xt_NFQUEUE.c b/net/netfilter/xt_NFQUEUE.c index 498b45101df..f28f6a5fc02 100644 --- a/net/netfilter/xt_NFQUEUE.c +++ b/net/netfilter/xt_NFQUEUE.c @@ -40,12 +40,12 @@ nfqueue_tg(struct sk_buff *skb, const struct xt_target_param *par) static u32 hash_v4(const struct sk_buff *skb) { const struct iphdr *iph = ip_hdr(skb); - u32 ipaddr; + __be32 ipaddr; /* packets in either direction go into same queue */ ipaddr = iph->saddr ^ iph->daddr; - return jhash_2words(ipaddr, iph->protocol, jhash_initval); + return jhash_2words((__force u32)ipaddr, iph->protocol, jhash_initval); } static unsigned int @@ -63,14 +63,14 @@ nfqueue_tg4_v1(struct sk_buff *skb, const struct xt_target_param *par) static u32 hash_v6(const struct sk_buff *skb) { const struct ipv6hdr *ip6h = ipv6_hdr(skb); - u32 addr[4]; + __be32 addr[4]; addr[0] = ip6h->saddr.s6_addr32[0] ^ ip6h->daddr.s6_addr32[0]; addr[1] = ip6h->saddr.s6_addr32[1] ^ ip6h->daddr.s6_addr32[1]; addr[2] = ip6h->saddr.s6_addr32[2] ^ ip6h->daddr.s6_addr32[2]; addr[3] = ip6h->saddr.s6_addr32[3] ^ ip6h->daddr.s6_addr32[3]; - return jhash2(addr, ARRAY_SIZE(addr), jhash_initval); + return jhash2((__force u32 *)addr, ARRAY_SIZE(addr), jhash_initval); } static unsigned int diff --git a/net/netfilter/xt_cluster.c b/net/netfilter/xt_cluster.c index 69a639f3540..225ee3ecd69 100644 --- a/net/netfilter/xt_cluster.c +++ b/net/netfilter/xt_cluster.c @@ -15,14 +15,14 @@ #include <net/netfilter/nf_conntrack.h> #include <linux/netfilter/xt_cluster.h> -static inline u_int32_t nf_ct_orig_ipv4_src(const struct nf_conn *ct) +static inline u32 nf_ct_orig_ipv4_src(const struct nf_conn *ct) { - return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip; + return (__force u32)ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip; } -static inline const void *nf_ct_orig_ipv6_src(const struct nf_conn *ct) +static inline const u32 *nf_ct_orig_ipv6_src(const struct nf_conn *ct) { - return ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip6; + return (__force u32 *)ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.u3.ip6; } static inline u_int32_t diff --git a/net/netfilter/xt_quota.c b/net/netfilter/xt_quota.c index 01dd07b764e..98fc190e8f0 100644 --- a/net/netfilter/xt_quota.c +++ b/net/netfilter/xt_quota.c @@ -54,6 +54,7 @@ static bool quota_mt_check(const struct xt_mtchk_param *par) if (q->master == NULL) return -ENOMEM; + q->master->quota = q->quota; return true; } diff --git a/net/netfilter/xt_rateest.c b/net/netfilter/xt_rateest.c index 220a1d588ee..4fc6a917f6d 100644 --- a/net/netfilter/xt_rateest.c +++ b/net/netfilter/xt_rateest.c @@ -66,7 +66,7 @@ xt_rateest_mt(const struct sk_buff *skb, const struct xt_match_param *par) if (info->flags & XT_RATEEST_MATCH_BPS) ret &= bps1 == bps2; if (info->flags & XT_RATEEST_MATCH_PPS) - ret &= pps2 == pps2; + ret &= pps1 == pps2; break; } diff --git a/net/rfkill/core.c b/net/rfkill/core.c index 4e68ab439d5..79693fe2001 100644 --- a/net/rfkill/core.c +++ b/net/rfkill/core.c @@ -56,7 +56,6 @@ struct rfkill { u32 idx; bool registered; - bool suspended; bool persistent; const struct rfkill_ops *ops; @@ -224,7 +223,7 @@ static void rfkill_send_events(struct rfkill *rfkill, enum rfkill_operation op) static void rfkill_event(struct rfkill *rfkill) { - if (!rfkill->registered || rfkill->suspended) + if (!rfkill->registered) return; kobject_uevent(&rfkill->dev.kobj, KOBJ_CHANGE); @@ -270,6 +269,9 @@ static void rfkill_set_block(struct rfkill *rfkill, bool blocked) unsigned long flags; int err; + if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP)) + return; + /* * Some platforms (...!) generate input events which affect the * _hard_ kill state -- whenever something tries to change the @@ -292,9 +294,6 @@ static void rfkill_set_block(struct rfkill *rfkill, bool blocked) rfkill->state |= RFKILL_BLOCK_SW_SETCALL; spin_unlock_irqrestore(&rfkill->lock, flags); - if (unlikely(rfkill->dev.power.power_state.event & PM_EVENT_SLEEP)) - return; - err = rfkill->ops->set_block(rfkill->data, blocked); spin_lock_irqsave(&rfkill->lock, flags); @@ -508,19 +507,32 @@ bool rfkill_set_sw_state(struct rfkill *rfkill, bool blocked) blocked = blocked || hwblock; spin_unlock_irqrestore(&rfkill->lock, flags); - if (!rfkill->registered) { - rfkill->persistent = true; - } else { - if (prev != blocked && !hwblock) - schedule_work(&rfkill->uevent_work); + if (!rfkill->registered) + return blocked; - rfkill_led_trigger_event(rfkill); - } + if (prev != blocked && !hwblock) + schedule_work(&rfkill->uevent_work); + + rfkill_led_trigger_event(rfkill); return blocked; } EXPORT_SYMBOL(rfkill_set_sw_state); +void rfkill_init_sw_state(struct rfkill *rfkill, bool blocked) +{ + unsigned long flags; + + BUG_ON(!rfkill); + BUG_ON(rfkill->registered); + + spin_lock_irqsave(&rfkill->lock, flags); + __rfkill_set_sw_state(rfkill, blocked); + rfkill->persistent = true; + spin_unlock_irqrestore(&rfkill->lock, flags); +} +EXPORT_SYMBOL(rfkill_init_sw_state); + void rfkill_set_states(struct rfkill *rfkill, bool sw, bool hw) { unsigned long flags; @@ -598,6 +610,15 @@ static ssize_t rfkill_idx_show(struct device *dev, return sprintf(buf, "%d\n", rfkill->idx); } +static ssize_t rfkill_persistent_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct rfkill *rfkill = to_rfkill(dev); + + return sprintf(buf, "%d\n", rfkill->persistent); +} + static u8 user_state_from_blocked(unsigned long state) { if (state & RFKILL_BLOCK_HW) @@ -656,6 +677,7 @@ static struct device_attribute rfkill_dev_attrs[] = { __ATTR(name, S_IRUGO, rfkill_name_show, NULL), __ATTR(type, S_IRUGO, rfkill_type_show, NULL), __ATTR(index, S_IRUGO, rfkill_idx_show, NULL), + __ATTR(persistent, S_IRUGO, rfkill_persistent_show, NULL), __ATTR(state, S_IRUGO|S_IWUSR, rfkill_state_show, rfkill_state_store), __ATTR(claim, S_IRUGO|S_IWUSR, rfkill_claim_show, rfkill_claim_store), __ATTR_NULL @@ -718,8 +740,6 @@ static int rfkill_suspend(struct device *dev, pm_message_t state) rfkill_pause_polling(rfkill); - rfkill->suspended = true; - return 0; } @@ -728,10 +748,10 @@ static int rfkill_resume(struct device *dev) struct rfkill *rfkill = to_rfkill(dev); bool cur; - cur = !!(rfkill->state & RFKILL_BLOCK_SW); - rfkill_set_block(rfkill, cur); - - rfkill->suspended = false; + if (!rfkill->persistent) { + cur = !!(rfkill->state & RFKILL_BLOCK_SW); + rfkill_set_block(rfkill, cur); + } rfkill_resume_polling(rfkill); diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index a63de3f7f18..6a4b1909414 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -133,7 +133,7 @@ static struct notifier_block sctp_inet6addr_notifier = { /* ICMP error handler. */ SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, - int type, int code, int offset, __be32 info) + u8 type, u8 code, int offset, __be32 info) { struct inet6_dev *idev; struct sock *sk; diff --git a/net/sunrpc/Makefile b/net/sunrpc/Makefile index 5369aa369b3..db73fd2a3f0 100644 --- a/net/sunrpc/Makefile +++ b/net/sunrpc/Makefile @@ -13,5 +13,6 @@ sunrpc-y := clnt.o xprt.o socklib.o xprtsock.o sched.o \ rpcb_clnt.o timer.o xdr.o \ sunrpc_syms.o cache.o rpc_pipe.o \ svc_xprt.o +sunrpc-$(CONFIG_NFS_V4_1) += backchannel_rqst.o bc_svc.o sunrpc-$(CONFIG_PROC_FS) += stats.o sunrpc-$(CONFIG_SYSCTL) += sysctl.o diff --git a/net/sunrpc/backchannel_rqst.c b/net/sunrpc/backchannel_rqst.c new file mode 100644 index 00000000000..553621fb2c4 --- /dev/null +++ b/net/sunrpc/backchannel_rqst.c @@ -0,0 +1,281 @@ +/****************************************************************************** + +(c) 2007 Network Appliance, Inc. All Rights Reserved. +(c) 2009 NetApp. All Rights Reserved. + +NetApp provides this source code under the GPL v2 License. +The GPL v2 license is available at +http://opensource.org/licenses/gpl-license.php. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR +CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +******************************************************************************/ + +#include <linux/tcp.h> +#include <linux/sunrpc/xprt.h> + +#ifdef RPC_DEBUG +#define RPCDBG_FACILITY RPCDBG_TRANS +#endif + +#if defined(CONFIG_NFS_V4_1) + +/* + * Helper routines that track the number of preallocation elements + * on the transport. + */ +static inline int xprt_need_to_requeue(struct rpc_xprt *xprt) +{ + return xprt->bc_alloc_count > 0; +} + +static inline void xprt_inc_alloc_count(struct rpc_xprt *xprt, unsigned int n) +{ + xprt->bc_alloc_count += n; +} + +static inline int xprt_dec_alloc_count(struct rpc_xprt *xprt, unsigned int n) +{ + return xprt->bc_alloc_count -= n; +} + +/* + * Free the preallocated rpc_rqst structure and the memory + * buffers hanging off of it. + */ +static void xprt_free_allocation(struct rpc_rqst *req) +{ + struct xdr_buf *xbufp; + + dprintk("RPC: free allocations for req= %p\n", req); + BUG_ON(test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state)); + xbufp = &req->rq_private_buf; + free_page((unsigned long)xbufp->head[0].iov_base); + xbufp = &req->rq_snd_buf; + free_page((unsigned long)xbufp->head[0].iov_base); + list_del(&req->rq_bc_pa_list); + kfree(req); +} + +/* + * Preallocate up to min_reqs structures and related buffers for use + * by the backchannel. This function can be called multiple times + * when creating new sessions that use the same rpc_xprt. The + * preallocated buffers are added to the pool of resources used by + * the rpc_xprt. Anyone of these resources may be used used by an + * incoming callback request. It's up to the higher levels in the + * stack to enforce that the maximum number of session slots is not + * being exceeded. + * + * Some callback arguments can be large. For example, a pNFS server + * using multiple deviceids. The list can be unbound, but the client + * has the ability to tell the server the maximum size of the callback + * requests. Each deviceID is 16 bytes, so allocate one page + * for the arguments to have enough room to receive a number of these + * deviceIDs. The NFS client indicates to the pNFS server that its + * callback requests can be up to 4096 bytes in size. + */ +int xprt_setup_backchannel(struct rpc_xprt *xprt, unsigned int min_reqs) +{ + struct page *page_rcv = NULL, *page_snd = NULL; + struct xdr_buf *xbufp = NULL; + struct rpc_rqst *req, *tmp; + struct list_head tmp_list; + int i; + + dprintk("RPC: setup backchannel transport\n"); + + /* + * We use a temporary list to keep track of the preallocated + * buffers. Once we're done building the list we splice it + * into the backchannel preallocation list off of the rpc_xprt + * struct. This helps minimize the amount of time the list + * lock is held on the rpc_xprt struct. It also makes cleanup + * easier in case of memory allocation errors. + */ + INIT_LIST_HEAD(&tmp_list); + for (i = 0; i < min_reqs; i++) { + /* Pre-allocate one backchannel rpc_rqst */ + req = kzalloc(sizeof(struct rpc_rqst), GFP_KERNEL); + if (req == NULL) { + printk(KERN_ERR "Failed to create bc rpc_rqst\n"); + goto out_free; + } + + /* Add the allocated buffer to the tmp list */ + dprintk("RPC: adding req= %p\n", req); + list_add(&req->rq_bc_pa_list, &tmp_list); + + req->rq_xprt = xprt; + INIT_LIST_HEAD(&req->rq_list); + INIT_LIST_HEAD(&req->rq_bc_list); + + /* Preallocate one XDR receive buffer */ + page_rcv = alloc_page(GFP_KERNEL); + if (page_rcv == NULL) { + printk(KERN_ERR "Failed to create bc receive xbuf\n"); + goto out_free; + } + xbufp = &req->rq_rcv_buf; + xbufp->head[0].iov_base = page_address(page_rcv); + xbufp->head[0].iov_len = PAGE_SIZE; + xbufp->tail[0].iov_base = NULL; + xbufp->tail[0].iov_len = 0; + xbufp->page_len = 0; + xbufp->len = PAGE_SIZE; + xbufp->buflen = PAGE_SIZE; + + /* Preallocate one XDR send buffer */ + page_snd = alloc_page(GFP_KERNEL); + if (page_snd == NULL) { + printk(KERN_ERR "Failed to create bc snd xbuf\n"); + goto out_free; + } + + xbufp = &req->rq_snd_buf; + xbufp->head[0].iov_base = page_address(page_snd); + xbufp->head[0].iov_len = 0; + xbufp->tail[0].iov_base = NULL; + xbufp->tail[0].iov_len = 0; + xbufp->page_len = 0; + xbufp->len = 0; + xbufp->buflen = PAGE_SIZE; + } + + /* + * Add the temporary list to the backchannel preallocation list + */ + spin_lock_bh(&xprt->bc_pa_lock); + list_splice(&tmp_list, &xprt->bc_pa_list); + xprt_inc_alloc_count(xprt, min_reqs); + spin_unlock_bh(&xprt->bc_pa_lock); + + dprintk("RPC: setup backchannel transport done\n"); + return 0; + +out_free: + /* + * Memory allocation failed, free the temporary list + */ + list_for_each_entry_safe(req, tmp, &tmp_list, rq_bc_pa_list) + xprt_free_allocation(req); + + dprintk("RPC: setup backchannel transport failed\n"); + return -1; +} +EXPORT_SYMBOL(xprt_setup_backchannel); + +/* + * Destroys the backchannel preallocated structures. + * Since these structures may have been allocated by multiple calls + * to xprt_setup_backchannel, we only destroy up to the maximum number + * of reqs specified by the caller. + * @xprt: the transport holding the preallocated strucures + * @max_reqs the maximum number of preallocated structures to destroy + */ +void xprt_destroy_backchannel(struct rpc_xprt *xprt, unsigned int max_reqs) +{ + struct rpc_rqst *req = NULL, *tmp = NULL; + + dprintk("RPC: destroy backchannel transport\n"); + + BUG_ON(max_reqs == 0); + spin_lock_bh(&xprt->bc_pa_lock); + xprt_dec_alloc_count(xprt, max_reqs); + list_for_each_entry_safe(req, tmp, &xprt->bc_pa_list, rq_bc_pa_list) { + dprintk("RPC: req=%p\n", req); + xprt_free_allocation(req); + if (--max_reqs == 0) + break; + } + spin_unlock_bh(&xprt->bc_pa_lock); + + dprintk("RPC: backchannel list empty= %s\n", + list_empty(&xprt->bc_pa_list) ? "true" : "false"); +} +EXPORT_SYMBOL(xprt_destroy_backchannel); + +/* + * One or more rpc_rqst structure have been preallocated during the + * backchannel setup. Buffer space for the send and private XDR buffers + * has been preallocated as well. Use xprt_alloc_bc_request to allocate + * to this request. Use xprt_free_bc_request to return it. + * + * We know that we're called in soft interrupt context, grab the spin_lock + * since there is no need to grab the bottom half spin_lock. + * + * Return an available rpc_rqst, otherwise NULL if non are available. + */ +struct rpc_rqst *xprt_alloc_bc_request(struct rpc_xprt *xprt) +{ + struct rpc_rqst *req; + + dprintk("RPC: allocate a backchannel request\n"); + spin_lock(&xprt->bc_pa_lock); + if (!list_empty(&xprt->bc_pa_list)) { + req = list_first_entry(&xprt->bc_pa_list, struct rpc_rqst, + rq_bc_pa_list); + list_del(&req->rq_bc_pa_list); + } else { + req = NULL; + } + spin_unlock(&xprt->bc_pa_lock); + + if (req != NULL) { + set_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state); + req->rq_reply_bytes_recvd = 0; + req->rq_bytes_sent = 0; + memcpy(&req->rq_private_buf, &req->rq_rcv_buf, + sizeof(req->rq_private_buf)); + } + dprintk("RPC: backchannel req=%p\n", req); + return req; +} + +/* + * Return the preallocated rpc_rqst structure and XDR buffers + * associated with this rpc_task. + */ +void xprt_free_bc_request(struct rpc_rqst *req) +{ + struct rpc_xprt *xprt = req->rq_xprt; + + dprintk("RPC: free backchannel req=%p\n", req); + + smp_mb__before_clear_bit(); + BUG_ON(!test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state)); + clear_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state); + smp_mb__after_clear_bit(); + + if (!xprt_need_to_requeue(xprt)) { + /* + * The last remaining session was destroyed while this + * entry was in use. Free the entry and don't attempt + * to add back to the list because there is no need to + * have anymore preallocated entries. + */ + dprintk("RPC: Last session removed req=%p\n", req); + xprt_free_allocation(req); + return; + } + + /* + * Return it to the list of preallocations so that it + * may be reused by a new callback request. + */ + spin_lock_bh(&xprt->bc_pa_lock); + list_add(&req->rq_bc_pa_list, &xprt->bc_pa_list); + spin_unlock_bh(&xprt->bc_pa_lock); +} + +#endif /* CONFIG_NFS_V4_1 */ diff --git a/net/sunrpc/bc_svc.c b/net/sunrpc/bc_svc.c new file mode 100644 index 00000000000..13f214f5312 --- /dev/null +++ b/net/sunrpc/bc_svc.c @@ -0,0 +1,81 @@ +/****************************************************************************** + +(c) 2007 Network Appliance, Inc. All Rights Reserved. +(c) 2009 NetApp. All Rights Reserved. + +NetApp provides this source code under the GPL v2 License. +The GPL v2 license is available at +http://opensource.org/licenses/gpl-license.php. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR +CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +******************************************************************************/ + +/* + * The NFSv4.1 callback service helper routines. + * They implement the transport level processing required to send the + * reply over an existing open connection previously established by the client. + */ + +#if defined(CONFIG_NFS_V4_1) + +#include <linux/module.h> + +#include <linux/sunrpc/xprt.h> +#include <linux/sunrpc/sched.h> +#include <linux/sunrpc/bc_xprt.h> + +#define RPCDBG_FACILITY RPCDBG_SVCDSP + +void bc_release_request(struct rpc_task *task) +{ + struct rpc_rqst *req = task->tk_rqstp; + + dprintk("RPC: bc_release_request: task= %p\n", task); + + /* + * Release this request only if it's a backchannel + * preallocated request + */ + if (!bc_prealloc(req)) + return; + xprt_free_bc_request(req); +} + +/* Empty callback ops */ +static const struct rpc_call_ops nfs41_callback_ops = { +}; + + +/* + * Send the callback reply + */ +int bc_send(struct rpc_rqst *req) +{ + struct rpc_task *task; + int ret; + + dprintk("RPC: bc_send req= %p\n", req); + task = rpc_run_bc_task(req, &nfs41_callback_ops); + if (IS_ERR(task)) + ret = PTR_ERR(task); + else { + BUG_ON(atomic_read(&task->tk_count) != 1); + ret = task->tk_status; + rpc_put_task(task); + } + return ret; + dprintk("RPC: bc_send ret= %d \n", ret); +} + +#endif /* CONFIG_NFS_V4_1 */ diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index 20029a79a5d..ff0c23053d2 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -488,7 +488,7 @@ static void do_cache_clean(struct work_struct *work) { int delay = 5; if (cache_clean() == -1) - delay = 30*HZ; + delay = round_jiffies_relative(30*HZ); if (list_empty(&cache_list)) delay = 0; diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 5abab094441..5bc2f45bddf 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -36,7 +36,9 @@ #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/rpc_pipe_fs.h> #include <linux/sunrpc/metrics.h> +#include <linux/sunrpc/bc_xprt.h> +#include "sunrpc.h" #ifdef RPC_DEBUG # define RPCDBG_FACILITY RPCDBG_CALL @@ -63,6 +65,9 @@ static void call_decode(struct rpc_task *task); static void call_bind(struct rpc_task *task); static void call_bind_status(struct rpc_task *task); static void call_transmit(struct rpc_task *task); +#if defined(CONFIG_NFS_V4_1) +static void call_bc_transmit(struct rpc_task *task); +#endif /* CONFIG_NFS_V4_1 */ static void call_status(struct rpc_task *task); static void call_transmit_status(struct rpc_task *task); static void call_refresh(struct rpc_task *task); @@ -613,6 +618,50 @@ rpc_call_async(struct rpc_clnt *clnt, const struct rpc_message *msg, int flags, } EXPORT_SYMBOL_GPL(rpc_call_async); +#if defined(CONFIG_NFS_V4_1) +/** + * rpc_run_bc_task - Allocate a new RPC task for backchannel use, then run + * rpc_execute against it + * @ops: RPC call ops + */ +struct rpc_task *rpc_run_bc_task(struct rpc_rqst *req, + const struct rpc_call_ops *tk_ops) +{ + struct rpc_task *task; + struct xdr_buf *xbufp = &req->rq_snd_buf; + struct rpc_task_setup task_setup_data = { + .callback_ops = tk_ops, + }; + + dprintk("RPC: rpc_run_bc_task req= %p\n", req); + /* + * Create an rpc_task to send the data + */ + task = rpc_new_task(&task_setup_data); + if (!task) { + xprt_free_bc_request(req); + goto out; + } + task->tk_rqstp = req; + + /* + * Set up the xdr_buf length. + * This also indicates that the buffer is XDR encoded already. + */ + xbufp->len = xbufp->head[0].iov_len + xbufp->page_len + + xbufp->tail[0].iov_len; + + task->tk_action = call_bc_transmit; + atomic_inc(&task->tk_count); + BUG_ON(atomic_read(&task->tk_count) != 2); + rpc_execute(task); + +out: + dprintk("RPC: rpc_run_bc_task: task= %p\n", task); + return task; +} +#endif /* CONFIG_NFS_V4_1 */ + void rpc_call_start(struct rpc_task *task) { @@ -695,6 +744,19 @@ void rpc_force_rebind(struct rpc_clnt *clnt) EXPORT_SYMBOL_GPL(rpc_force_rebind); /* + * Restart an (async) RPC call from the call_prepare state. + * Usually called from within the exit handler. + */ +void +rpc_restart_call_prepare(struct rpc_task *task) +{ + if (RPC_ASSASSINATED(task)) + return; + task->tk_action = rpc_prepare_task; +} +EXPORT_SYMBOL_GPL(rpc_restart_call_prepare); + +/* * Restart an (async) RPC call. Usually called from within the * exit handler. */ @@ -1085,7 +1147,7 @@ call_transmit(struct rpc_task *task) * in order to allow access to the socket to other RPC requests. */ call_transmit_status(task); - if (task->tk_msg.rpc_proc->p_decode != NULL) + if (rpc_reply_expected(task)) return; task->tk_action = rpc_exit_task; rpc_wake_up_queued_task(&task->tk_xprt->pending, task); @@ -1120,6 +1182,72 @@ call_transmit_status(struct rpc_task *task) } } +#if defined(CONFIG_NFS_V4_1) +/* + * 5b. Send the backchannel RPC reply. On error, drop the reply. In + * addition, disconnect on connectivity errors. + */ +static void +call_bc_transmit(struct rpc_task *task) +{ + struct rpc_rqst *req = task->tk_rqstp; + + BUG_ON(task->tk_status != 0); + task->tk_status = xprt_prepare_transmit(task); + if (task->tk_status == -EAGAIN) { + /* + * Could not reserve the transport. Try again after the + * transport is released. + */ + task->tk_status = 0; + task->tk_action = call_bc_transmit; + return; + } + + task->tk_action = rpc_exit_task; + if (task->tk_status < 0) { + printk(KERN_NOTICE "RPC: Could not send backchannel reply " + "error: %d\n", task->tk_status); + return; + } + + xprt_transmit(task); + xprt_end_transmit(task); + dprint_status(task); + switch (task->tk_status) { + case 0: + /* Success */ + break; + case -EHOSTDOWN: + case -EHOSTUNREACH: + case -ENETUNREACH: + case -ETIMEDOUT: + /* + * Problem reaching the server. Disconnect and let the + * forechannel reestablish the connection. The server will + * have to retransmit the backchannel request and we'll + * reprocess it. Since these ops are idempotent, there's no + * need to cache our reply at this time. + */ + printk(KERN_NOTICE "RPC: Could not send backchannel reply " + "error: %d\n", task->tk_status); + xprt_conditional_disconnect(task->tk_xprt, + req->rq_connect_cookie); + break; + default: + /* + * We were unable to reply and will have to drop the + * request. The server should reconnect and retransmit. + */ + BUG_ON(task->tk_status == -EAGAIN); + printk(KERN_NOTICE "RPC: Could not send backchannel reply " + "error: %d\n", task->tk_status); + break; + } + rpc_wake_up_queued_task(&req->rq_xprt->pending, task); +} +#endif /* CONFIG_NFS_V4_1 */ + /* * 6. Sort out the RPC call status */ @@ -1130,8 +1258,8 @@ call_status(struct rpc_task *task) struct rpc_rqst *req = task->tk_rqstp; int status; - if (req->rq_received > 0 && !req->rq_bytes_sent) - task->tk_status = req->rq_received; + if (req->rq_reply_bytes_recvd > 0 && !req->rq_bytes_sent) + task->tk_status = req->rq_reply_bytes_recvd; dprint_status(task); @@ -1248,7 +1376,7 @@ call_decode(struct rpc_task *task) /* * Ensure that we see all writes made by xprt_complete_rqst() - * before it changed req->rq_received. + * before it changed req->rq_reply_bytes_recvd. */ smp_rmb(); req->rq_rcv_buf.len = req->rq_private_buf.len; @@ -1289,7 +1417,7 @@ out_retry: task->tk_status = 0; /* Note: rpc_verify_header() may have freed the RPC slot */ if (task->tk_rqstp == req) { - req->rq_received = req->rq_rcv_buf.len = 0; + req->rq_reply_bytes_recvd = req->rq_rcv_buf.len = 0; if (task->tk_client->cl_discrtry) xprt_conditional_disconnect(task->tk_xprt, req->rq_connect_cookie); @@ -1377,13 +1505,14 @@ rpc_verify_header(struct rpc_task *task) } if ((len -= 3) < 0) goto out_overflow; - p += 1; /* skip XID */ + p += 1; /* skip XID */ if ((n = ntohl(*p++)) != RPC_REPLY) { dprintk("RPC: %5u %s: not an RPC reply: %x\n", - task->tk_pid, __func__, n); + task->tk_pid, __func__, n); goto out_garbage; } + if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) { if (--len < 0) goto out_overflow; diff --git a/net/sunrpc/sched.c b/net/sunrpc/sched.c index ff50a054686..1102ce1251f 100644 --- a/net/sunrpc/sched.c +++ b/net/sunrpc/sched.c @@ -569,7 +569,7 @@ EXPORT_SYMBOL_GPL(rpc_delay); /* * Helper to call task->tk_ops->rpc_call_prepare */ -static void rpc_prepare_task(struct rpc_task *task) +void rpc_prepare_task(struct rpc_task *task) { task->tk_ops->rpc_call_prepare(task, task->tk_calldata); } diff --git a/net/sunrpc/stats.c b/net/sunrpc/stats.c index 1ef6e46d9da..1b4e6791ecf 100644 --- a/net/sunrpc/stats.c +++ b/net/sunrpc/stats.c @@ -141,12 +141,14 @@ EXPORT_SYMBOL_GPL(rpc_free_iostats); void rpc_count_iostats(struct rpc_task *task) { struct rpc_rqst *req = task->tk_rqstp; - struct rpc_iostats *stats = task->tk_client->cl_metrics; + struct rpc_iostats *stats; struct rpc_iostats *op_metrics; long rtt, execute, queue; - if (!stats || !req) + if (!task->tk_client || !task->tk_client->cl_metrics || !req) return; + + stats = task->tk_client->cl_metrics; op_metrics = &stats[task->tk_msg.rpc_proc->p_statidx]; op_metrics->om_ops++; @@ -154,7 +156,7 @@ void rpc_count_iostats(struct rpc_task *task) op_metrics->om_timeouts += task->tk_timeouts; op_metrics->om_bytes_sent += task->tk_bytes_sent; - op_metrics->om_bytes_recv += req->rq_received; + op_metrics->om_bytes_recv += req->rq_reply_bytes_recvd; queue = (long)req->rq_xtime - task->tk_start; if (queue < 0) diff --git a/net/sunrpc/sunrpc.h b/net/sunrpc/sunrpc.h new file mode 100644 index 00000000000..5d9dd742264 --- /dev/null +++ b/net/sunrpc/sunrpc.h @@ -0,0 +1,37 @@ +/****************************************************************************** + +(c) 2008 NetApp. All Rights Reserved. + +NetApp provides this source code under the GPL v2 License. +The GPL v2 license is available at +http://opensource.org/licenses/gpl-license.php. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR +CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, +EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, +PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR +PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +******************************************************************************/ + +/* + * Functions and macros used internally by RPC + */ + +#ifndef _NET_SUNRPC_SUNRPC_H +#define _NET_SUNRPC_SUNRPC_H + +static inline int rpc_reply_expected(struct rpc_task *task) +{ + return (task->tk_msg.rpc_proc != NULL) && + (task->tk_msg.rpc_proc->p_decode != NULL); +} + +#endif /* _NET_SUNRPC_SUNRPC_H */ + diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c index 5ed8931dfe9..952f206ff30 100644 --- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -25,6 +25,7 @@ #include <linux/sunrpc/stats.h> #include <linux/sunrpc/svcsock.h> #include <linux/sunrpc/clnt.h> +#include <linux/sunrpc/bc_xprt.h> #define RPCDBG_FACILITY RPCDBG_SVCDSP @@ -486,6 +487,10 @@ svc_destroy(struct svc_serv *serv) if (svc_serv_is_pooled(serv)) svc_pool_map_put(); +#if defined(CONFIG_NFS_V4_1) + svc_sock_destroy(serv->bc_xprt); +#endif /* CONFIG_NFS_V4_1 */ + svc_unregister(serv); kfree(serv->sv_pools); kfree(serv); @@ -970,20 +975,18 @@ svc_printk(struct svc_rqst *rqstp, const char *fmt, ...) } /* - * Process the RPC request. + * Common routine for processing the RPC request. */ -int -svc_process(struct svc_rqst *rqstp) +static int +svc_process_common(struct svc_rqst *rqstp, struct kvec *argv, struct kvec *resv) { struct svc_program *progp; struct svc_version *versp = NULL; /* compiler food */ struct svc_procedure *procp = NULL; - struct kvec * argv = &rqstp->rq_arg.head[0]; - struct kvec * resv = &rqstp->rq_res.head[0]; struct svc_serv *serv = rqstp->rq_server; kxdrproc_t xdr; __be32 *statp; - u32 dir, prog, vers, proc; + u32 prog, vers, proc; __be32 auth_stat, rpc_stat; int auth_res; __be32 *reply_statp; @@ -993,19 +996,6 @@ svc_process(struct svc_rqst *rqstp) if (argv->iov_len < 6*4) goto err_short_len; - /* setup response xdr_buf. - * Initially it has just one page - */ - rqstp->rq_resused = 1; - resv->iov_base = page_address(rqstp->rq_respages[0]); - resv->iov_len = 0; - rqstp->rq_res.pages = rqstp->rq_respages + 1; - rqstp->rq_res.len = 0; - rqstp->rq_res.page_base = 0; - rqstp->rq_res.page_len = 0; - rqstp->rq_res.buflen = PAGE_SIZE; - rqstp->rq_res.tail[0].iov_base = NULL; - rqstp->rq_res.tail[0].iov_len = 0; /* Will be turned off only in gss privacy case: */ rqstp->rq_splice_ok = 1; /* Will be turned off only when NFSv4 Sessions are used */ @@ -1014,17 +1004,13 @@ svc_process(struct svc_rqst *rqstp) /* Setup reply header */ rqstp->rq_xprt->xpt_ops->xpo_prep_reply_hdr(rqstp); - rqstp->rq_xid = svc_getu32(argv); svc_putu32(resv, rqstp->rq_xid); - dir = svc_getnl(argv); vers = svc_getnl(argv); /* First words of reply: */ svc_putnl(resv, 1); /* REPLY */ - if (dir != 0) /* direction != CALL */ - goto err_bad_dir; if (vers != 2) /* RPC version number */ goto err_bad_rpc; @@ -1147,7 +1133,7 @@ svc_process(struct svc_rqst *rqstp) sendit: if (svc_authorise(rqstp)) goto dropit; - return svc_send(rqstp); + return 1; /* Caller can now send it */ dropit: svc_authorise(rqstp); /* doesn't hurt to call this twice */ @@ -1161,12 +1147,6 @@ err_short_len: goto dropit; /* drop request */ -err_bad_dir: - svc_printk(rqstp, "bad direction %d, dropping request\n", dir); - - serv->sv_stats->rpcbadfmt++; - goto dropit; /* drop request */ - err_bad_rpc: serv->sv_stats->rpcbadfmt++; svc_putnl(resv, 1); /* REJECT */ @@ -1220,6 +1200,100 @@ err_bad: EXPORT_SYMBOL_GPL(svc_process); /* + * Process the RPC request. + */ +int +svc_process(struct svc_rqst *rqstp) +{ + struct kvec *argv = &rqstp->rq_arg.head[0]; + struct kvec *resv = &rqstp->rq_res.head[0]; + struct svc_serv *serv = rqstp->rq_server; + u32 dir; + int error; + + /* + * Setup response xdr_buf. + * Initially it has just one page + */ + rqstp->rq_resused = 1; + resv->iov_base = page_address(rqstp->rq_respages[0]); + resv->iov_len = 0; + rqstp->rq_res.pages = rqstp->rq_respages + 1; + rqstp->rq_res.len = 0; + rqstp->rq_res.page_base = 0; + rqstp->rq_res.page_len = 0; + rqstp->rq_res.buflen = PAGE_SIZE; + rqstp->rq_res.tail[0].iov_base = NULL; + rqstp->rq_res.tail[0].iov_len = 0; + + rqstp->rq_xid = svc_getu32(argv); + + dir = svc_getnl(argv); + if (dir != 0) { + /* direction != CALL */ + svc_printk(rqstp, "bad direction %d, dropping request\n", dir); + serv->sv_stats->rpcbadfmt++; + svc_drop(rqstp); + return 0; + } + + error = svc_process_common(rqstp, argv, resv); + if (error <= 0) + return error; + + return svc_send(rqstp); +} + +#if defined(CONFIG_NFS_V4_1) +/* + * Process a backchannel RPC request that arrived over an existing + * outbound connection + */ +int +bc_svc_process(struct svc_serv *serv, struct rpc_rqst *req, + struct svc_rqst *rqstp) +{ + struct kvec *argv = &rqstp->rq_arg.head[0]; + struct kvec *resv = &rqstp->rq_res.head[0]; + int error; + + /* Build the svc_rqst used by the common processing routine */ + rqstp->rq_xprt = serv->bc_xprt; + rqstp->rq_xid = req->rq_xid; + rqstp->rq_prot = req->rq_xprt->prot; + rqstp->rq_server = serv; + + rqstp->rq_addrlen = sizeof(req->rq_xprt->addr); + memcpy(&rqstp->rq_addr, &req->rq_xprt->addr, rqstp->rq_addrlen); + memcpy(&rqstp->rq_arg, &req->rq_rcv_buf, sizeof(rqstp->rq_arg)); + memcpy(&rqstp->rq_res, &req->rq_snd_buf, sizeof(rqstp->rq_res)); + + /* reset result send buffer "put" position */ + resv->iov_len = 0; + + if (rqstp->rq_prot != IPPROTO_TCP) { + printk(KERN_ERR "No support for Non-TCP transports!\n"); + BUG(); + } + + /* + * Skip the next two words because they've already been + * processed in the trasport + */ + svc_getu32(argv); /* XID */ + svc_getnl(argv); /* CALLDIR */ + + error = svc_process_common(rqstp, argv, resv); + if (error <= 0) + return error; + + memcpy(&req->rq_snd_buf, &rqstp->rq_res, sizeof(req->rq_snd_buf)); + return bc_send(req); +} +EXPORT_SYMBOL(bc_svc_process); +#endif /* CONFIG_NFS_V4_1 */ + +/* * Return (transport-specific) limit on the rpc payload. */ u32 svc_max_payload(const struct svc_rqst *rqstp) diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c index c200d92e57e..6f33d33cc06 100644 --- a/net/sunrpc/svc_xprt.c +++ b/net/sunrpc/svc_xprt.c @@ -11,6 +11,7 @@ #include <net/sock.h> #include <linux/sunrpc/stats.h> #include <linux/sunrpc/svc_xprt.h> +#include <linux/sunrpc/svcsock.h> #define RPCDBG_FACILITY RPCDBG_SVCXPRT @@ -1097,36 +1098,58 @@ struct svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name, } EXPORT_SYMBOL_GPL(svc_find_xprt); -/* - * Format a buffer with a list of the active transports. A zero for - * the buflen parameter disables target buffer overflow checking. +static int svc_one_xprt_name(const struct svc_xprt *xprt, + char *pos, int remaining) +{ + int len; + + len = snprintf(pos, remaining, "%s %u\n", + xprt->xpt_class->xcl_name, + svc_xprt_local_port(xprt)); + if (len >= remaining) + return -ENAMETOOLONG; + return len; +} + +/** + * svc_xprt_names - format a buffer with a list of transport names + * @serv: pointer to an RPC service + * @buf: pointer to a buffer to be filled in + * @buflen: length of buffer to be filled in + * + * Fills in @buf with a string containing a list of transport names, + * each name terminated with '\n'. + * + * Returns positive length of the filled-in string on success; otherwise + * a negative errno value is returned if an error occurs. */ -int svc_xprt_names(struct svc_serv *serv, char *buf, int buflen) +int svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen) { struct svc_xprt *xprt; - char xprt_str[64]; - int totlen = 0; - int len; + int len, totlen; + char *pos; /* Sanity check args */ if (!serv) return 0; spin_lock_bh(&serv->sv_lock); + + pos = buf; + totlen = 0; list_for_each_entry(xprt, &serv->sv_permsocks, xpt_list) { - len = snprintf(xprt_str, sizeof(xprt_str), - "%s %d\n", xprt->xpt_class->xcl_name, - svc_xprt_local_port(xprt)); - /* If the string was truncated, replace with error string */ - if (len >= sizeof(xprt_str)) - strcpy(xprt_str, "name-too-long\n"); - /* Don't overflow buffer */ - len = strlen(xprt_str); - if (buflen && (len + totlen >= buflen)) + len = svc_one_xprt_name(xprt, pos, buflen - totlen); + if (len < 0) { + *buf = '\0'; + totlen = len; + } + if (len <= 0) break; - strcpy(buf+totlen, xprt_str); + + pos += len; totlen += len; } + spin_unlock_bh(&serv->sv_lock); return totlen; } diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 9d504234af4..23128ee191a 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -240,42 +240,76 @@ out: /* * Report socket names for nfsdfs */ -static int one_sock_name(char *buf, struct svc_sock *svsk) +static int svc_one_sock_name(struct svc_sock *svsk, char *buf, int remaining) { + const struct sock *sk = svsk->sk_sk; + const char *proto_name = sk->sk_protocol == IPPROTO_UDP ? + "udp" : "tcp"; int len; - switch(svsk->sk_sk->sk_family) { - case AF_INET: - len = sprintf(buf, "ipv4 %s %pI4 %d\n", - svsk->sk_sk->sk_protocol == IPPROTO_UDP ? - "udp" : "tcp", - &inet_sk(svsk->sk_sk)->rcv_saddr, - inet_sk(svsk->sk_sk)->num); + switch (sk->sk_family) { + case PF_INET: + len = snprintf(buf, remaining, "ipv4 %s %pI4 %d\n", + proto_name, + &inet_sk(sk)->rcv_saddr, + inet_sk(sk)->num); + break; + case PF_INET6: + len = snprintf(buf, remaining, "ipv6 %s %pI6 %d\n", + proto_name, + &inet6_sk(sk)->rcv_saddr, + inet_sk(sk)->num); break; default: - len = sprintf(buf, "*unknown-%d*\n", - svsk->sk_sk->sk_family); + len = snprintf(buf, remaining, "*unknown-%d*\n", + sk->sk_family); + } + + if (len >= remaining) { + *buf = '\0'; + return -ENAMETOOLONG; } return len; } -int -svc_sock_names(char *buf, struct svc_serv *serv, char *toclose) +/** + * svc_sock_names - construct a list of listener names in a string + * @serv: pointer to RPC service + * @buf: pointer to a buffer to fill in with socket names + * @buflen: size of the buffer to be filled + * @toclose: pointer to '\0'-terminated C string containing the name + * of a listener to be closed + * + * Fills in @buf with a '\n'-separated list of names of listener + * sockets. If @toclose is not NULL, the socket named by @toclose + * is closed, and is not included in the output list. + * + * Returns positive length of the socket name string, or a negative + * errno value on error. + */ +int svc_sock_names(struct svc_serv *serv, char *buf, const size_t buflen, + const char *toclose) { struct svc_sock *svsk, *closesk = NULL; int len = 0; if (!serv) return 0; + spin_lock_bh(&serv->sv_lock); list_for_each_entry(svsk, &serv->sv_permsocks, sk_xprt.xpt_list) { - int onelen = one_sock_name(buf+len, svsk); - if (toclose && strcmp(toclose, buf+len) == 0) + int onelen = svc_one_sock_name(svsk, buf + len, buflen - len); + if (onelen < 0) { + len = onelen; + break; + } + if (toclose && strcmp(toclose, buf + len) == 0) closesk = svsk; else len += onelen; } spin_unlock_bh(&serv->sv_lock); + if (closesk) /* Should unregister with portmap, but you cannot * unregister just one protocol... @@ -346,6 +380,7 @@ static void svc_sock_setbufsize(struct socket *sock, unsigned int snd, sock->sk->sk_sndbuf = snd * 2; sock->sk->sk_rcvbuf = rcv * 2; sock->sk->sk_userlocks |= SOCK_SNDBUF_LOCK|SOCK_RCVBUF_LOCK; + sock->sk->sk_write_space(sock->sk); release_sock(sock->sk); #endif } @@ -387,6 +422,15 @@ static void svc_write_space(struct sock *sk) } } +static void svc_tcp_write_space(struct sock *sk) +{ + struct socket *sock = sk->sk_socket; + + if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk) && sock) + clear_bit(SOCK_NOSPACE, &sock->flags); + svc_write_space(sk); +} + /* * Copy the UDP datagram's destination address to the rqstp structure. * The 'destination' address in this case is the address to which the @@ -427,13 +471,14 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) long all[SVC_PKTINFO_SPACE / sizeof(long)]; } buffer; struct cmsghdr *cmh = &buffer.hdr; - int err, len; struct msghdr msg = { .msg_name = svc_addr(rqstp), .msg_control = cmh, .msg_controllen = sizeof(buffer), .msg_flags = MSG_DONTWAIT, }; + size_t len; + int err; if (test_and_clear_bit(XPT_CHNGBUF, &svsk->sk_xprt.xpt_flags)) /* udp sockets need large rcvbuf as all pending @@ -465,8 +510,8 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) return -EAGAIN; } len = svc_addr_len(svc_addr(rqstp)); - if (len < 0) - return len; + if (len == 0) + return -EAFNOSUPPORT; rqstp->rq_addrlen = len; if (skb->tstamp.tv64 == 0) { skb->tstamp = ktime_get_real(); @@ -980,25 +1025,16 @@ static void svc_tcp_prep_reply_hdr(struct svc_rqst *rqstp) static int svc_tcp_has_wspace(struct svc_xprt *xprt) { struct svc_sock *svsk = container_of(xprt, struct svc_sock, sk_xprt); - struct svc_serv *serv = svsk->sk_xprt.xpt_server; + struct svc_serv *serv = svsk->sk_xprt.xpt_server; int required; - int wspace; - /* - * Set the SOCK_NOSPACE flag before checking the available - * sock space. - */ + if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) + return 1; + required = atomic_read(&xprt->xpt_reserved) + serv->sv_max_mesg; + if (sk_stream_wspace(svsk->sk_sk) >= required) + return 1; set_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); - required = atomic_read(&svsk->sk_xprt.xpt_reserved) + serv->sv_max_mesg; - wspace = sk_stream_wspace(svsk->sk_sk); - - if (wspace < sk_stream_min_wspace(svsk->sk_sk)) - return 0; - if (required * 2 > wspace) - return 0; - - clear_bit(SOCK_NOSPACE, &svsk->sk_sock->flags); - return 1; + return 0; } static struct svc_xprt *svc_tcp_create(struct svc_serv *serv, @@ -1054,7 +1090,7 @@ static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv) dprintk("setting up TCP socket for reading\n"); sk->sk_state_change = svc_tcp_state_change; sk->sk_data_ready = svc_tcp_data_ready; - sk->sk_write_space = svc_write_space; + sk->sk_write_space = svc_tcp_write_space; svsk->sk_reclen = 0; svsk->sk_tcplen = 0; @@ -1148,9 +1184,19 @@ static struct svc_sock *svc_setup_socket(struct svc_serv *serv, return svsk; } -int svc_addsock(struct svc_serv *serv, - int fd, - char *name_return) +/** + * svc_addsock - add a listener socket to an RPC service + * @serv: pointer to RPC service to which to add a new listener + * @fd: file descriptor of the new listener + * @name_return: pointer to buffer to fill in with name of listener + * @len: size of the buffer + * + * Fills in socket name and returns positive length of name if successful. + * Name is terminated with '\n'. On error, returns a negative errno + * value. + */ +int svc_addsock(struct svc_serv *serv, const int fd, char *name_return, + const size_t len) { int err = 0; struct socket *so = sockfd_lookup(fd, &err); @@ -1190,7 +1236,7 @@ int svc_addsock(struct svc_serv *serv, sockfd_put(so); return err; } - return one_sock_name(name_return, svsk); + return svc_one_sock_name(svsk, name_return, len); } EXPORT_SYMBOL_GPL(svc_addsock); @@ -1327,3 +1373,42 @@ static void svc_sock_free(struct svc_xprt *xprt) sock_release(svsk->sk_sock); kfree(svsk); } + +/* + * Create a svc_xprt. + * + * For internal use only (e.g. nfsv4.1 backchannel). + * Callers should typically use the xpo_create() method. + */ +struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot) +{ + struct svc_sock *svsk; + struct svc_xprt *xprt = NULL; + + dprintk("svc: %s\n", __func__); + svsk = kzalloc(sizeof(*svsk), GFP_KERNEL); + if (!svsk) + goto out; + + xprt = &svsk->sk_xprt; + if (prot == IPPROTO_TCP) + svc_xprt_init(&svc_tcp_class, xprt, serv); + else if (prot == IPPROTO_UDP) + svc_xprt_init(&svc_udp_class, xprt, serv); + else + BUG(); +out: + dprintk("svc: %s return %p\n", __func__, xprt); + return xprt; +} +EXPORT_SYMBOL_GPL(svc_sock_create); + +/* + * Destroy a svc_sock. + */ +void svc_sock_destroy(struct svc_xprt *xprt) +{ + if (xprt) + kfree(container_of(xprt, struct svc_sock, sk_xprt)); +} +EXPORT_SYMBOL_GPL(svc_sock_destroy); diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c index 06ca058572f..f412a852bc7 100644 --- a/net/sunrpc/xprt.c +++ b/net/sunrpc/xprt.c @@ -12,8 +12,9 @@ * - Next, the caller puts together the RPC message, stuffs it into * the request struct, and calls xprt_transmit(). * - xprt_transmit sends the message and installs the caller on the - * transport's wait list. At the same time, it installs a timer that - * is run after the packet's timeout has expired. + * transport's wait list. At the same time, if a reply is expected, + * it installs a timer that is run after the packet's timeout has + * expired. * - When a packet arrives, the data_ready handler walks the list of * pending requests for that transport. If a matching XID is found, the * caller is woken up, and the timer removed. @@ -46,6 +47,8 @@ #include <linux/sunrpc/clnt.h> #include <linux/sunrpc/metrics.h> +#include "sunrpc.h" + /* * Local variables */ @@ -192,8 +195,8 @@ EXPORT_SYMBOL_GPL(xprt_load_transport); */ int xprt_reserve_xprt(struct rpc_task *task) { - struct rpc_xprt *xprt = task->tk_xprt; struct rpc_rqst *req = task->tk_rqstp; + struct rpc_xprt *xprt = req->rq_xprt; if (test_and_set_bit(XPRT_LOCKED, &xprt->state)) { if (task == xprt->snd_task) @@ -803,9 +806,10 @@ void xprt_complete_rqst(struct rpc_task *task, int copied) list_del_init(&req->rq_list); req->rq_private_buf.len = copied; - /* Ensure all writes are done before we update req->rq_received */ + /* Ensure all writes are done before we update */ + /* req->rq_reply_bytes_recvd */ smp_wmb(); - req->rq_received = copied; + req->rq_reply_bytes_recvd = copied; rpc_wake_up_queued_task(&xprt->pending, task); } EXPORT_SYMBOL_GPL(xprt_complete_rqst); @@ -820,7 +824,7 @@ static void xprt_timer(struct rpc_task *task) dprintk("RPC: %5u xprt_timer\n", task->tk_pid); spin_lock_bh(&xprt->transport_lock); - if (!req->rq_received) { + if (!req->rq_reply_bytes_recvd) { if (xprt->ops->timer) xprt->ops->timer(task); } else @@ -842,8 +846,8 @@ int xprt_prepare_transmit(struct rpc_task *task) dprintk("RPC: %5u xprt_prepare_transmit\n", task->tk_pid); spin_lock_bh(&xprt->transport_lock); - if (req->rq_received && !req->rq_bytes_sent) { - err = req->rq_received; + if (req->rq_reply_bytes_recvd && !req->rq_bytes_sent) { + err = req->rq_reply_bytes_recvd; goto out_unlock; } if (!xprt->ops->reserve_xprt(task)) @@ -855,7 +859,7 @@ out_unlock: void xprt_end_transmit(struct rpc_task *task) { - xprt_release_write(task->tk_xprt, task); + xprt_release_write(task->tk_rqstp->rq_xprt, task); } /** @@ -872,8 +876,11 @@ void xprt_transmit(struct rpc_task *task) dprintk("RPC: %5u xprt_transmit(%u)\n", task->tk_pid, req->rq_slen); - if (!req->rq_received) { - if (list_empty(&req->rq_list)) { + if (!req->rq_reply_bytes_recvd) { + if (list_empty(&req->rq_list) && rpc_reply_expected(task)) { + /* + * Add to the list only if we're expecting a reply + */ spin_lock_bh(&xprt->transport_lock); /* Update the softirq receive buffer */ memcpy(&req->rq_private_buf, &req->rq_rcv_buf, @@ -908,8 +915,13 @@ void xprt_transmit(struct rpc_task *task) /* Don't race with disconnect */ if (!xprt_connected(xprt)) task->tk_status = -ENOTCONN; - else if (!req->rq_received) + else if (!req->rq_reply_bytes_recvd && rpc_reply_expected(task)) { + /* + * Sleep on the pending queue since + * we're expecting a reply. + */ rpc_sleep_on(&xprt->pending, task, xprt_timer); + } spin_unlock_bh(&xprt->transport_lock); } @@ -982,11 +994,17 @@ static void xprt_request_init(struct rpc_task *task, struct rpc_xprt *xprt) */ void xprt_release(struct rpc_task *task) { - struct rpc_xprt *xprt = task->tk_xprt; + struct rpc_xprt *xprt; struct rpc_rqst *req; + int is_bc_request; if (!(req = task->tk_rqstp)) return; + + /* Preallocated backchannel request? */ + is_bc_request = bc_prealloc(req); + + xprt = req->rq_xprt; rpc_count_iostats(task); spin_lock_bh(&xprt->transport_lock); xprt->ops->release_xprt(xprt, task); @@ -999,10 +1017,19 @@ void xprt_release(struct rpc_task *task) mod_timer(&xprt->timer, xprt->last_used + xprt->idle_timeout); spin_unlock_bh(&xprt->transport_lock); - xprt->ops->buf_free(req->rq_buffer); + if (!bc_prealloc(req)) + xprt->ops->buf_free(req->rq_buffer); task->tk_rqstp = NULL; if (req->rq_release_snd_buf) req->rq_release_snd_buf(req); + + /* + * Early exit if this is a backchannel preallocated request. + * There is no need to have it added to the RPC slot list. + */ + if (is_bc_request) + return; + memset(req, 0, sizeof(*req)); /* mark unused */ dprintk("RPC: %5u release request %p\n", task->tk_pid, req); @@ -1049,6 +1076,11 @@ found: INIT_LIST_HEAD(&xprt->free); INIT_LIST_HEAD(&xprt->recv); +#if defined(CONFIG_NFS_V4_1) + spin_lock_init(&xprt->bc_pa_lock); + INIT_LIST_HEAD(&xprt->bc_pa_list); +#endif /* CONFIG_NFS_V4_1 */ + INIT_WORK(&xprt->task_cleanup, xprt_autoclose); setup_timer(&xprt->timer, xprt_init_autodisconnect, (unsigned long)xprt); diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index 42a6f9f2028..9e884383134 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -397,14 +397,14 @@ static int rdma_read_xdr(struct svcxprt_rdma *xprt, if (!ch) return 0; - /* Allocate temporary reply and chunk maps */ - rpl_map = svc_rdma_get_req_map(); - chl_map = svc_rdma_get_req_map(); - svc_rdma_rcl_chunk_counts(ch, &ch_count, &byte_count); if (ch_count > RPCSVC_MAXPAGES) return -EINVAL; + /* Allocate temporary reply and chunk maps */ + rpl_map = svc_rdma_get_req_map(); + chl_map = svc_rdma_get_req_map(); + if (!xprt->sc_frmr_pg_list_len) sge_count = map_read_chunks(xprt, rqstp, hdr_ctxt, rmsgp, rpl_map, chl_map, ch_count, diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index 6c2d6158655..83c73c4d017 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -34,6 +34,9 @@ #include <linux/sunrpc/sched.h> #include <linux/sunrpc/xprtsock.h> #include <linux/file.h> +#ifdef CONFIG_NFS_V4_1 +#include <linux/sunrpc/bc_xprt.h> +#endif #include <net/sock.h> #include <net/checksum.h> @@ -270,6 +273,13 @@ struct sock_xprt { #define TCP_RCV_COPY_FRAGHDR (1UL << 1) #define TCP_RCV_COPY_XID (1UL << 2) #define TCP_RCV_COPY_DATA (1UL << 3) +#define TCP_RCV_READ_CALLDIR (1UL << 4) +#define TCP_RCV_COPY_CALLDIR (1UL << 5) + +/* + * TCP RPC flags + */ +#define TCP_RPC_REPLY (1UL << 6) static inline struct sockaddr *xs_addr(struct rpc_xprt *xprt) { @@ -956,7 +966,7 @@ static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_rea transport->tcp_offset = 0; /* Sanity check of the record length */ - if (unlikely(transport->tcp_reclen < 4)) { + if (unlikely(transport->tcp_reclen < 8)) { dprintk("RPC: invalid TCP record fragment length\n"); xprt_force_disconnect(xprt); return; @@ -991,33 +1001,77 @@ static inline void xs_tcp_read_xid(struct sock_xprt *transport, struct xdr_skb_r if (used != len) return; transport->tcp_flags &= ~TCP_RCV_COPY_XID; - transport->tcp_flags |= TCP_RCV_COPY_DATA; + transport->tcp_flags |= TCP_RCV_READ_CALLDIR; transport->tcp_copied = 4; - dprintk("RPC: reading reply for XID %08x\n", + dprintk("RPC: reading %s XID %08x\n", + (transport->tcp_flags & TCP_RPC_REPLY) ? "reply for" + : "request with", ntohl(transport->tcp_xid)); xs_tcp_check_fraghdr(transport); } -static inline void xs_tcp_read_request(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) +static inline void xs_tcp_read_calldir(struct sock_xprt *transport, + struct xdr_skb_reader *desc) { - struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); - struct rpc_rqst *req; + size_t len, used; + u32 offset; + __be32 calldir; + + /* + * We want transport->tcp_offset to be 8 at the end of this routine + * (4 bytes for the xid and 4 bytes for the call/reply flag). + * When this function is called for the first time, + * transport->tcp_offset is 4 (after having already read the xid). + */ + offset = transport->tcp_offset - sizeof(transport->tcp_xid); + len = sizeof(calldir) - offset; + dprintk("RPC: reading CALL/REPLY flag (%Zu bytes)\n", len); + used = xdr_skb_read_bits(desc, &calldir, len); + transport->tcp_offset += used; + if (used != len) + return; + transport->tcp_flags &= ~TCP_RCV_READ_CALLDIR; + transport->tcp_flags |= TCP_RCV_COPY_CALLDIR; + transport->tcp_flags |= TCP_RCV_COPY_DATA; + /* + * We don't yet have the XDR buffer, so we will write the calldir + * out after we get the buffer from the 'struct rpc_rqst' + */ + if (ntohl(calldir) == RPC_REPLY) + transport->tcp_flags |= TCP_RPC_REPLY; + else + transport->tcp_flags &= ~TCP_RPC_REPLY; + dprintk("RPC: reading %s CALL/REPLY flag %08x\n", + (transport->tcp_flags & TCP_RPC_REPLY) ? + "reply for" : "request with", calldir); + xs_tcp_check_fraghdr(transport); +} + +static inline void xs_tcp_read_common(struct rpc_xprt *xprt, + struct xdr_skb_reader *desc, + struct rpc_rqst *req) +{ + struct sock_xprt *transport = + container_of(xprt, struct sock_xprt, xprt); struct xdr_buf *rcvbuf; size_t len; ssize_t r; - /* Find and lock the request corresponding to this xid */ - spin_lock(&xprt->transport_lock); - req = xprt_lookup_rqst(xprt, transport->tcp_xid); - if (!req) { - transport->tcp_flags &= ~TCP_RCV_COPY_DATA; - dprintk("RPC: XID %08x request not found!\n", - ntohl(transport->tcp_xid)); - spin_unlock(&xprt->transport_lock); - return; + rcvbuf = &req->rq_private_buf; + + if (transport->tcp_flags & TCP_RCV_COPY_CALLDIR) { + /* + * Save the RPC direction in the XDR buffer + */ + __be32 calldir = transport->tcp_flags & TCP_RPC_REPLY ? + htonl(RPC_REPLY) : 0; + + memcpy(rcvbuf->head[0].iov_base + transport->tcp_copied, + &calldir, sizeof(calldir)); + transport->tcp_copied += sizeof(calldir); + transport->tcp_flags &= ~TCP_RCV_COPY_CALLDIR; } - rcvbuf = &req->rq_private_buf; len = desc->count; if (len > transport->tcp_reclen - transport->tcp_offset) { struct xdr_skb_reader my_desc; @@ -1054,7 +1108,7 @@ static inline void xs_tcp_read_request(struct rpc_xprt *xprt, struct xdr_skb_rea "tcp_offset = %u, tcp_reclen = %u\n", xprt, transport->tcp_copied, transport->tcp_offset, transport->tcp_reclen); - goto out; + return; } dprintk("RPC: XID %08x read %Zd bytes\n", @@ -1070,11 +1124,125 @@ static inline void xs_tcp_read_request(struct rpc_xprt *xprt, struct xdr_skb_rea transport->tcp_flags &= ~TCP_RCV_COPY_DATA; } -out: + return; +} + +/* + * Finds the request corresponding to the RPC xid and invokes the common + * tcp read code to read the data. + */ +static inline int xs_tcp_read_reply(struct rpc_xprt *xprt, + struct xdr_skb_reader *desc) +{ + struct sock_xprt *transport = + container_of(xprt, struct sock_xprt, xprt); + struct rpc_rqst *req; + + dprintk("RPC: read reply XID %08x\n", ntohl(transport->tcp_xid)); + + /* Find and lock the request corresponding to this xid */ + spin_lock(&xprt->transport_lock); + req = xprt_lookup_rqst(xprt, transport->tcp_xid); + if (!req) { + dprintk("RPC: XID %08x request not found!\n", + ntohl(transport->tcp_xid)); + spin_unlock(&xprt->transport_lock); + return -1; + } + + xs_tcp_read_common(xprt, desc, req); + if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) xprt_complete_rqst(req->rq_task, transport->tcp_copied); + spin_unlock(&xprt->transport_lock); - xs_tcp_check_fraghdr(transport); + return 0; +} + +#if defined(CONFIG_NFS_V4_1) +/* + * Obtains an rpc_rqst previously allocated and invokes the common + * tcp read code to read the data. The result is placed in the callback + * queue. + * If we're unable to obtain the rpc_rqst we schedule the closing of the + * connection and return -1. + */ +static inline int xs_tcp_read_callback(struct rpc_xprt *xprt, + struct xdr_skb_reader *desc) +{ + struct sock_xprt *transport = + container_of(xprt, struct sock_xprt, xprt); + struct rpc_rqst *req; + + req = xprt_alloc_bc_request(xprt); + if (req == NULL) { + printk(KERN_WARNING "Callback slot table overflowed\n"); + xprt_force_disconnect(xprt); + return -1; + } + + req->rq_xid = transport->tcp_xid; + dprintk("RPC: read callback XID %08x\n", ntohl(req->rq_xid)); + xs_tcp_read_common(xprt, desc, req); + + if (!(transport->tcp_flags & TCP_RCV_COPY_DATA)) { + struct svc_serv *bc_serv = xprt->bc_serv; + + /* + * Add callback request to callback list. The callback + * service sleeps on the sv_cb_waitq waiting for new + * requests. Wake it up after adding enqueing the + * request. + */ + dprintk("RPC: add callback request to list\n"); + spin_lock(&bc_serv->sv_cb_lock); + list_add(&req->rq_bc_list, &bc_serv->sv_cb_list); + spin_unlock(&bc_serv->sv_cb_lock); + wake_up(&bc_serv->sv_cb_waitq); + } + + req->rq_private_buf.len = transport->tcp_copied; + + return 0; +} + +static inline int _xs_tcp_read_data(struct rpc_xprt *xprt, + struct xdr_skb_reader *desc) +{ + struct sock_xprt *transport = + container_of(xprt, struct sock_xprt, xprt); + + return (transport->tcp_flags & TCP_RPC_REPLY) ? + xs_tcp_read_reply(xprt, desc) : + xs_tcp_read_callback(xprt, desc); +} +#else +static inline int _xs_tcp_read_data(struct rpc_xprt *xprt, + struct xdr_skb_reader *desc) +{ + return xs_tcp_read_reply(xprt, desc); +} +#endif /* CONFIG_NFS_V4_1 */ + +/* + * Read data off the transport. This can be either an RPC_CALL or an + * RPC_REPLY. Relay the processing to helper functions. + */ +static void xs_tcp_read_data(struct rpc_xprt *xprt, + struct xdr_skb_reader *desc) +{ + struct sock_xprt *transport = + container_of(xprt, struct sock_xprt, xprt); + + if (_xs_tcp_read_data(xprt, desc) == 0) + xs_tcp_check_fraghdr(transport); + else { + /* + * The transport_lock protects the request handling. + * There's no need to hold it to update the tcp_flags. + */ + transport->tcp_flags &= ~TCP_RCV_COPY_DATA; + } } static inline void xs_tcp_read_discard(struct sock_xprt *transport, struct xdr_skb_reader *desc) @@ -1114,9 +1282,14 @@ static int xs_tcp_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb, uns xs_tcp_read_xid(transport, &desc); continue; } + /* Read in the call/reply flag */ + if (transport->tcp_flags & TCP_RCV_READ_CALLDIR) { + xs_tcp_read_calldir(transport, &desc); + continue; + } /* Read in the request data */ if (transport->tcp_flags & TCP_RCV_COPY_DATA) { - xs_tcp_read_request(xprt, &desc); + xs_tcp_read_data(xprt, &desc); continue; } /* Skip over any trailing bytes on short reads */ @@ -1792,6 +1965,7 @@ static void xs_tcp_setup_socket(struct rpc_xprt *xprt, */ set_bit(XPRT_CONNECTION_CLOSE, &xprt->state); xprt_force_disconnect(xprt); + break; case -ECONNREFUSED: case -ECONNRESET: case -ENETUNREACH: @@ -2010,6 +2184,9 @@ static struct rpc_xprt_ops xs_tcp_ops = { .buf_free = rpc_free, .send_request = xs_tcp_send_request, .set_retrans_timeout = xprt_set_retrans_timeout_def, +#if defined(CONFIG_NFS_V4_1) + .release_request = bc_release_request, +#endif /* CONFIG_NFS_V4_1 */ .close = xs_tcp_close, .destroy = xs_destroy, .print_stats = xs_tcp_print_stats, diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 24168560eba..241bddd0b4f 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -1687,13 +1687,52 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info) if (err) goto out_rtnl; - if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && - dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) { - err = -EINVAL; + err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, ¶ms.vlan); + if (err) goto out; + + /* validate settings */ + err = 0; + + switch (dev->ieee80211_ptr->iftype) { + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_AP_VLAN: + /* disallow mesh-specific things */ + if (params.plink_action) + err = -EINVAL; + break; + case NL80211_IFTYPE_STATION: + /* disallow everything but AUTHORIZED flag */ + if (params.plink_action) + err = -EINVAL; + if (params.vlan) + err = -EINVAL; + if (params.supported_rates) + err = -EINVAL; + if (params.ht_capa) + err = -EINVAL; + if (params.listen_interval >= 0) + err = -EINVAL; + if (params.sta_flags_mask & ~BIT(NL80211_STA_FLAG_AUTHORIZED)) + err = -EINVAL; + break; + case NL80211_IFTYPE_MESH_POINT: + /* disallow things mesh doesn't support */ + if (params.vlan) + err = -EINVAL; + if (params.ht_capa) + err = -EINVAL; + if (params.listen_interval >= 0) + err = -EINVAL; + if (params.supported_rates) + err = -EINVAL; + if (params.sta_flags_mask) + err = -EINVAL; + break; + default: + err = -EINVAL; } - err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, ¶ms.vlan); if (err) goto out; @@ -1728,9 +1767,6 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) if (!info->attrs[NL80211_ATTR_MAC]) return -EINVAL; - if (!info->attrs[NL80211_ATTR_STA_AID]) - return -EINVAL; - if (!info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]) return -EINVAL; @@ -1745,9 +1781,11 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) params.listen_interval = nla_get_u16(info->attrs[NL80211_ATTR_STA_LISTEN_INTERVAL]); - params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); - if (!params.aid || params.aid > IEEE80211_MAX_AID) - return -EINVAL; + if (info->attrs[NL80211_ATTR_STA_AID]) { + params.aid = nla_get_u16(info->attrs[NL80211_ATTR_STA_AID]); + if (!params.aid || params.aid > IEEE80211_MAX_AID) + return -EINVAL; + } if (info->attrs[NL80211_ATTR_HT_CAPABILITY]) params.ht_capa = @@ -1762,13 +1800,39 @@ static int nl80211_new_station(struct sk_buff *skb, struct genl_info *info) if (err) goto out_rtnl; - if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && - dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) { - err = -EINVAL; + err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, ¶ms.vlan); + if (err) goto out; + + /* validate settings */ + err = 0; + + switch (dev->ieee80211_ptr->iftype) { + case NL80211_IFTYPE_AP: + case NL80211_IFTYPE_AP_VLAN: + /* all ok but must have AID */ + if (!params.aid) + err = -EINVAL; + break; + case NL80211_IFTYPE_MESH_POINT: + /* disallow things mesh doesn't support */ + if (params.vlan) + err = -EINVAL; + if (params.aid) + err = -EINVAL; + if (params.ht_capa) + err = -EINVAL; + if (params.listen_interval >= 0) + err = -EINVAL; + if (params.supported_rates) + err = -EINVAL; + if (params.sta_flags_mask) + err = -EINVAL; + break; + default: + err = -EINVAL; } - err = get_vlan(info->attrs[NL80211_ATTR_STA_VLAN], drv, ¶ms.vlan); if (err) goto out; @@ -1812,7 +1876,8 @@ static int nl80211_del_station(struct sk_buff *skb, struct genl_info *info) goto out_rtnl; if (dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP && - dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN) { + dev->ieee80211_ptr->iftype != NL80211_IFTYPE_AP_VLAN && + dev->ieee80211_ptr->iftype != NL80211_IFTYPE_MESH_POINT) { err = -EINVAL; goto out; } |