![Robert P. J. Day](/assets/img/avatar_default.png)
Replacing (almost) all invocations of list_for_each() with list_for_each_entry() tightens up the code and allows for the deletion of numerous list iterator variables that are no longer necessary. Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
386 lines
11 KiB
C
386 lines
11 KiB
C
/* SCTP kernel implementation
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* Copyright (c) 2003 International Business Machines, Corp.
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*
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* This file is part of the SCTP kernel implementation
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*
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* This SCTP implementation is free software;
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* you can redistribute it and/or modify it under the terms of
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* the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This SCTP implementation is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* ************************
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU CC; see the file COPYING. If not, write to
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* the Free Software Foundation, 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Please send any bug reports or fixes you make to the
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* email address(es):
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* lksctp developers <lksctp-developers@lists.sourceforge.net>
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*
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* Or submit a bug report through the following website:
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* http://www.sf.net/projects/lksctp
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*
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* Written or modified by:
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* Sridhar Samudrala <sri@us.ibm.com>
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*
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* Any bugs reported given to us we will try to fix... any fixes shared will
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* be incorporated into the next SCTP release.
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*/
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#include <linux/types.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <net/sctp/sctp.h>
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#include <net/ip.h> /* for snmp_fold_field */
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static struct snmp_mib sctp_snmp_list[] = {
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SNMP_MIB_ITEM("SctpCurrEstab", SCTP_MIB_CURRESTAB),
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SNMP_MIB_ITEM("SctpActiveEstabs", SCTP_MIB_ACTIVEESTABS),
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SNMP_MIB_ITEM("SctpPassiveEstabs", SCTP_MIB_PASSIVEESTABS),
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SNMP_MIB_ITEM("SctpAborteds", SCTP_MIB_ABORTEDS),
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SNMP_MIB_ITEM("SctpShutdowns", SCTP_MIB_SHUTDOWNS),
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SNMP_MIB_ITEM("SctpOutOfBlues", SCTP_MIB_OUTOFBLUES),
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SNMP_MIB_ITEM("SctpChecksumErrors", SCTP_MIB_CHECKSUMERRORS),
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SNMP_MIB_ITEM("SctpOutCtrlChunks", SCTP_MIB_OUTCTRLCHUNKS),
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SNMP_MIB_ITEM("SctpOutOrderChunks", SCTP_MIB_OUTORDERCHUNKS),
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SNMP_MIB_ITEM("SctpOutUnorderChunks", SCTP_MIB_OUTUNORDERCHUNKS),
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SNMP_MIB_ITEM("SctpInCtrlChunks", SCTP_MIB_INCTRLCHUNKS),
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SNMP_MIB_ITEM("SctpInOrderChunks", SCTP_MIB_INORDERCHUNKS),
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SNMP_MIB_ITEM("SctpInUnorderChunks", SCTP_MIB_INUNORDERCHUNKS),
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SNMP_MIB_ITEM("SctpFragUsrMsgs", SCTP_MIB_FRAGUSRMSGS),
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SNMP_MIB_ITEM("SctpReasmUsrMsgs", SCTP_MIB_REASMUSRMSGS),
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SNMP_MIB_ITEM("SctpOutSCTPPacks", SCTP_MIB_OUTSCTPPACKS),
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SNMP_MIB_ITEM("SctpInSCTPPacks", SCTP_MIB_INSCTPPACKS),
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SNMP_MIB_ITEM("SctpT1InitExpireds", SCTP_MIB_T1_INIT_EXPIREDS),
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SNMP_MIB_ITEM("SctpT1CookieExpireds", SCTP_MIB_T1_COOKIE_EXPIREDS),
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SNMP_MIB_ITEM("SctpT2ShutdownExpireds", SCTP_MIB_T2_SHUTDOWN_EXPIREDS),
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SNMP_MIB_ITEM("SctpT3RtxExpireds", SCTP_MIB_T3_RTX_EXPIREDS),
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SNMP_MIB_ITEM("SctpT4RtoExpireds", SCTP_MIB_T4_RTO_EXPIREDS),
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SNMP_MIB_ITEM("SctpT5ShutdownGuardExpireds", SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS),
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SNMP_MIB_ITEM("SctpDelaySackExpireds", SCTP_MIB_DELAY_SACK_EXPIREDS),
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SNMP_MIB_ITEM("SctpAutocloseExpireds", SCTP_MIB_AUTOCLOSE_EXPIREDS),
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SNMP_MIB_ITEM("SctpT3Retransmits", SCTP_MIB_T3_RETRANSMITS),
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SNMP_MIB_ITEM("SctpPmtudRetransmits", SCTP_MIB_PMTUD_RETRANSMITS),
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SNMP_MIB_ITEM("SctpFastRetransmits", SCTP_MIB_FAST_RETRANSMITS),
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SNMP_MIB_ITEM("SctpInPktSoftirq", SCTP_MIB_IN_PKT_SOFTIRQ),
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SNMP_MIB_ITEM("SctpInPktBacklog", SCTP_MIB_IN_PKT_BACKLOG),
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SNMP_MIB_ITEM("SctpInPktDiscards", SCTP_MIB_IN_PKT_DISCARDS),
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SNMP_MIB_ITEM("SctpInDataChunkDiscards", SCTP_MIB_IN_DATA_CHUNK_DISCARDS),
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SNMP_MIB_SENTINEL
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};
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/* Display sctp snmp mib statistics(/proc/net/sctp/snmp). */
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static int sctp_snmp_seq_show(struct seq_file *seq, void *v)
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{
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int i;
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for (i = 0; sctp_snmp_list[i].name != NULL; i++)
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seq_printf(seq, "%-32s\t%ld\n", sctp_snmp_list[i].name,
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snmp_fold_field((void **)sctp_statistics,
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sctp_snmp_list[i].entry));
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return 0;
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}
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/* Initialize the seq file operations for 'snmp' object. */
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static int sctp_snmp_seq_open(struct inode *inode, struct file *file)
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{
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return single_open(file, sctp_snmp_seq_show, NULL);
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}
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static const struct file_operations sctp_snmp_seq_fops = {
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.owner = THIS_MODULE,
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.open = sctp_snmp_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = single_release,
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};
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/* Set up the proc fs entry for 'snmp' object. */
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int __init sctp_snmp_proc_init(void)
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{
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struct proc_dir_entry *p;
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p = proc_create("snmp", S_IRUGO, proc_net_sctp, &sctp_snmp_seq_fops);
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if (!p)
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return -ENOMEM;
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return 0;
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}
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/* Cleanup the proc fs entry for 'snmp' object. */
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void sctp_snmp_proc_exit(void)
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{
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remove_proc_entry("snmp", proc_net_sctp);
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}
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/* Dump local addresses of an association/endpoint. */
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static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb)
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{
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struct sctp_association *asoc;
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struct sctp_sockaddr_entry *laddr;
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struct sctp_transport *peer;
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union sctp_addr *addr, *primary = NULL;
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struct sctp_af *af;
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if (epb->type == SCTP_EP_TYPE_ASSOCIATION) {
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asoc = sctp_assoc(epb);
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peer = asoc->peer.primary_path;
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primary = &peer->saddr;
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}
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list_for_each_entry(laddr, &epb->bind_addr.address_list, list) {
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addr = &laddr->a;
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af = sctp_get_af_specific(addr->sa.sa_family);
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if (primary && af->cmp_addr(addr, primary)) {
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seq_printf(seq, "*");
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}
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af->seq_dump_addr(seq, addr);
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}
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}
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/* Dump remote addresses of an association. */
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static void sctp_seq_dump_remote_addrs(struct seq_file *seq, struct sctp_association *assoc)
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{
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struct sctp_transport *transport;
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union sctp_addr *addr, *primary;
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struct sctp_af *af;
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primary = &assoc->peer.primary_addr;
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list_for_each_entry(transport, &assoc->peer.transport_addr_list,
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transports) {
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addr = &transport->ipaddr;
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af = sctp_get_af_specific(addr->sa.sa_family);
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if (af->cmp_addr(addr, primary)) {
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seq_printf(seq, "*");
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}
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af->seq_dump_addr(seq, addr);
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}
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}
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static void * sctp_eps_seq_start(struct seq_file *seq, loff_t *pos)
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{
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if (*pos >= sctp_ep_hashsize)
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return NULL;
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if (*pos < 0)
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*pos = 0;
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if (*pos == 0)
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seq_printf(seq, " ENDPT SOCK STY SST HBKT LPORT UID INODE LADDRS\n");
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return (void *)pos;
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}
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static void sctp_eps_seq_stop(struct seq_file *seq, void *v)
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{
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return;
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}
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static void * sctp_eps_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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if (++*pos >= sctp_ep_hashsize)
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return NULL;
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return pos;
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}
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/* Display sctp endpoints (/proc/net/sctp/eps). */
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static int sctp_eps_seq_show(struct seq_file *seq, void *v)
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{
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struct sctp_hashbucket *head;
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struct sctp_ep_common *epb;
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struct sctp_endpoint *ep;
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struct sock *sk;
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struct hlist_node *node;
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int hash = *(loff_t *)v;
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if (hash >= sctp_ep_hashsize)
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return -ENOMEM;
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head = &sctp_ep_hashtable[hash];
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sctp_local_bh_disable();
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read_lock(&head->lock);
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sctp_for_each_hentry(epb, node, &head->chain) {
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ep = sctp_ep(epb);
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sk = epb->sk;
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seq_printf(seq, "%8p %8p %-3d %-3d %-4d %-5d %5d %5lu ", ep, sk,
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sctp_sk(sk)->type, sk->sk_state, hash,
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epb->bind_addr.port,
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sock_i_uid(sk), sock_i_ino(sk));
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sctp_seq_dump_local_addrs(seq, epb);
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seq_printf(seq, "\n");
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}
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read_unlock(&head->lock);
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sctp_local_bh_enable();
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return 0;
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}
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static const struct seq_operations sctp_eps_ops = {
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.start = sctp_eps_seq_start,
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.next = sctp_eps_seq_next,
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.stop = sctp_eps_seq_stop,
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.show = sctp_eps_seq_show,
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};
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/* Initialize the seq file operations for 'eps' object. */
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static int sctp_eps_seq_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &sctp_eps_ops);
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}
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static const struct file_operations sctp_eps_seq_fops = {
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.open = sctp_eps_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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/* Set up the proc fs entry for 'eps' object. */
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int __init sctp_eps_proc_init(void)
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{
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struct proc_dir_entry *p;
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p = proc_create("eps", S_IRUGO, proc_net_sctp, &sctp_eps_seq_fops);
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if (!p)
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return -ENOMEM;
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return 0;
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}
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/* Cleanup the proc fs entry for 'eps' object. */
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void sctp_eps_proc_exit(void)
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{
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remove_proc_entry("eps", proc_net_sctp);
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}
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static void * sctp_assocs_seq_start(struct seq_file *seq, loff_t *pos)
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{
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if (*pos >= sctp_assoc_hashsize)
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return NULL;
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if (*pos < 0)
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*pos = 0;
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if (*pos == 0)
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seq_printf(seq, " ASSOC SOCK STY SST ST HBKT "
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"ASSOC-ID TX_QUEUE RX_QUEUE UID INODE LPORT "
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"RPORT LADDRS <-> RADDRS "
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"HBINT INS OUTS MAXRT T1X T2X RTXC\n");
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return (void *)pos;
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}
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static void sctp_assocs_seq_stop(struct seq_file *seq, void *v)
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{
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return;
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}
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static void * sctp_assocs_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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if (++*pos >= sctp_assoc_hashsize)
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return NULL;
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return pos;
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}
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/* Display sctp associations (/proc/net/sctp/assocs). */
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static int sctp_assocs_seq_show(struct seq_file *seq, void *v)
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{
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struct sctp_hashbucket *head;
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struct sctp_ep_common *epb;
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struct sctp_association *assoc;
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struct sock *sk;
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struct hlist_node *node;
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int hash = *(loff_t *)v;
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if (hash >= sctp_assoc_hashsize)
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return -ENOMEM;
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head = &sctp_assoc_hashtable[hash];
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sctp_local_bh_disable();
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read_lock(&head->lock);
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sctp_for_each_hentry(epb, node, &head->chain) {
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assoc = sctp_assoc(epb);
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sk = epb->sk;
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seq_printf(seq,
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"%8p %8p %-3d %-3d %-2d %-4d "
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"%4d %8d %8d %7d %5lu %-5d %5d ",
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assoc, sk, sctp_sk(sk)->type, sk->sk_state,
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assoc->state, hash,
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assoc->assoc_id,
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assoc->sndbuf_used,
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atomic_read(&assoc->rmem_alloc),
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sock_i_uid(sk), sock_i_ino(sk),
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epb->bind_addr.port,
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assoc->peer.port);
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seq_printf(seq, " ");
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sctp_seq_dump_local_addrs(seq, epb);
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seq_printf(seq, "<-> ");
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sctp_seq_dump_remote_addrs(seq, assoc);
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seq_printf(seq, "\t%8lu %5d %5d %4d %4d %4d %8d ",
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assoc->hbinterval, assoc->c.sinit_max_instreams,
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assoc->c.sinit_num_ostreams, assoc->max_retrans,
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assoc->init_retries, assoc->shutdown_retries,
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assoc->rtx_data_chunks);
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seq_printf(seq, "\n");
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}
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read_unlock(&head->lock);
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sctp_local_bh_enable();
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return 0;
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}
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static const struct seq_operations sctp_assoc_ops = {
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.start = sctp_assocs_seq_start,
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.next = sctp_assocs_seq_next,
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.stop = sctp_assocs_seq_stop,
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.show = sctp_assocs_seq_show,
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};
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/* Initialize the seq file operations for 'assocs' object. */
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static int sctp_assocs_seq_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &sctp_assoc_ops);
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}
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static const struct file_operations sctp_assocs_seq_fops = {
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.open = sctp_assocs_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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/* Set up the proc fs entry for 'assocs' object. */
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int __init sctp_assocs_proc_init(void)
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{
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struct proc_dir_entry *p;
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p = proc_create("assocs", S_IRUGO, proc_net_sctp,
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&sctp_assocs_seq_fops);
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if (!p)
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return -ENOMEM;
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return 0;
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}
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/* Cleanup the proc fs entry for 'assocs' object. */
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void sctp_assocs_proc_exit(void)
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{
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remove_proc_entry("assocs", proc_net_sctp);
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}
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