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a83863174a
sctp stream reconf, described in RFC 6525, needs a structure to
save per stream information in assoc, like stream state.
In the future, sctp stream scheduler also needs it to save some
stream scheduler params and queues.
This patchset is to prepare the stream array in assoc for stream
reconf. It defines sctp_stream that includes stream arrays inside
to replace ssnmap.
Note that we use different structures for IN and OUT streams, as
the members in per OUT stream will get more and more different
from per IN stream.
v1->v2:
- put these patches into a smaller group.
v2->v3:
- define sctp_stream to contain stream arrays, and create stream.c
to put stream-related functions.
- merge 3 patches into 1, as new sctp_stream has the same name
with before.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/* SCTP kernel implementation
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* (C) Copyright IBM Corp. 2001, 2004
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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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* Support for memory object debugging. This allows one to monitor the
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* object allocations/deallocations for types instrumented for this
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* via the proc fs.
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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, see
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* <http://www.gnu.org/licenses/>.
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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 <linux-sctp@vger.kernel.org>
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*
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* Written or modified by:
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* Jon Grimm <jgrimm@us.ibm.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/kernel.h>
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#include <net/sctp/sctp.h>
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/*
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* Global counters to count raw object allocation counts.
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* To add new counters, choose a unique suffix for the variable
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* name as the helper macros key off this suffix to make
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* life easier for the programmer.
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*/
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SCTP_DBG_OBJCNT(sock);
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SCTP_DBG_OBJCNT(ep);
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SCTP_DBG_OBJCNT(transport);
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SCTP_DBG_OBJCNT(assoc);
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SCTP_DBG_OBJCNT(bind_addr);
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SCTP_DBG_OBJCNT(bind_bucket);
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SCTP_DBG_OBJCNT(chunk);
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SCTP_DBG_OBJCNT(addr);
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SCTP_DBG_OBJCNT(datamsg);
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SCTP_DBG_OBJCNT(keys);
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/* An array to make it easy to pretty print the debug information
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* to the proc fs.
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*/
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static sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = {
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SCTP_DBG_OBJCNT_ENTRY(sock),
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SCTP_DBG_OBJCNT_ENTRY(ep),
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SCTP_DBG_OBJCNT_ENTRY(assoc),
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SCTP_DBG_OBJCNT_ENTRY(transport),
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SCTP_DBG_OBJCNT_ENTRY(chunk),
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SCTP_DBG_OBJCNT_ENTRY(bind_addr),
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SCTP_DBG_OBJCNT_ENTRY(bind_bucket),
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SCTP_DBG_OBJCNT_ENTRY(addr),
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SCTP_DBG_OBJCNT_ENTRY(datamsg),
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SCTP_DBG_OBJCNT_ENTRY(keys),
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};
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/* Callback from procfs to read out objcount information.
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* Walk through the entries in the sctp_dbg_objcnt array, dumping
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* the raw object counts for each monitored type.
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*/
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static int sctp_objcnt_seq_show(struct seq_file *seq, void *v)
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{
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int i;
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i = (int)*(loff_t *)v;
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seq_setwidth(seq, 127);
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seq_printf(seq, "%s: %d", sctp_dbg_objcnt[i].label,
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atomic_read(sctp_dbg_objcnt[i].counter));
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seq_pad(seq, '\n');
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return 0;
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}
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static void *sctp_objcnt_seq_start(struct seq_file *seq, loff_t *pos)
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{
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return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos;
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}
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static void sctp_objcnt_seq_stop(struct seq_file *seq, void *v)
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{
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}
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static void *sctp_objcnt_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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++*pos;
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return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos;
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}
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static const struct seq_operations sctp_objcnt_seq_ops = {
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.start = sctp_objcnt_seq_start,
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.next = sctp_objcnt_seq_next,
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.stop = sctp_objcnt_seq_stop,
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.show = sctp_objcnt_seq_show,
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};
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static int sctp_objcnt_seq_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &sctp_objcnt_seq_ops);
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}
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static const struct file_operations sctp_objcnt_ops = {
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.open = sctp_objcnt_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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/* Initialize the objcount in the proc filesystem. */
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void sctp_dbg_objcnt_init(struct net *net)
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{
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struct proc_dir_entry *ent;
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ent = proc_create("sctp_dbg_objcnt", 0,
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net->sctp.proc_net_sctp, &sctp_objcnt_ops);
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if (!ent)
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pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n");
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}
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/* Cleanup the objcount entry in the proc filesystem. */
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void sctp_dbg_objcnt_exit(struct net *net)
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{
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remove_proc_entry("sctp_dbg_objcnt", net->sctp.proc_net_sctp);
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}
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