/* SCTP kernel implementation * (C) Copyright IBM Corp. 2001, 2004 * * This file is part of the SCTP kernel implementation * * Support for memory object debugging. This allows one to monitor the * object allocations/deallocations for types instrumented for this * via the proc fs. * * This SCTP implementation is free software; * you can redistribute it and/or modify it under the terms of * the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * This SCTP implementation is distributed in the hope that it * will be useful, but WITHOUT ANY WARRANTY; without even the implied * ************************ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with GNU CC; see the file COPYING. If not, write to * the Free Software Foundation, 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. * * Please send any bug reports or fixes you make to the * email address(es): * lksctp developers <lksctp-developers@lists.sourceforge.net> * * Or submit a bug report through the following website: * http://www.sf.net/projects/lksctp * * Written or modified by: * Jon Grimm <jgrimm@us.ibm.com> * * Any bugs reported given to us we will try to fix... any fixes shared will * be incorporated into the next SCTP release. */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/kernel.h> #include <net/sctp/sctp.h> /* * Global counters to count raw object allocation counts. * To add new counters, choose a unique suffix for the variable * name as the helper macros key off this suffix to make * life easier for the programmer. */ SCTP_DBG_OBJCNT(sock); SCTP_DBG_OBJCNT(ep); SCTP_DBG_OBJCNT(transport); SCTP_DBG_OBJCNT(assoc); SCTP_DBG_OBJCNT(bind_addr); SCTP_DBG_OBJCNT(bind_bucket); SCTP_DBG_OBJCNT(chunk); SCTP_DBG_OBJCNT(addr); SCTP_DBG_OBJCNT(ssnmap); SCTP_DBG_OBJCNT(datamsg); SCTP_DBG_OBJCNT(keys); /* An array to make it easy to pretty print the debug information * to the proc fs. */ static sctp_dbg_objcnt_entry_t sctp_dbg_objcnt[] = { SCTP_DBG_OBJCNT_ENTRY(sock), SCTP_DBG_OBJCNT_ENTRY(ep), SCTP_DBG_OBJCNT_ENTRY(assoc), SCTP_DBG_OBJCNT_ENTRY(transport), SCTP_DBG_OBJCNT_ENTRY(chunk), SCTP_DBG_OBJCNT_ENTRY(bind_addr), SCTP_DBG_OBJCNT_ENTRY(bind_bucket), SCTP_DBG_OBJCNT_ENTRY(addr), SCTP_DBG_OBJCNT_ENTRY(ssnmap), SCTP_DBG_OBJCNT_ENTRY(datamsg), SCTP_DBG_OBJCNT_ENTRY(keys), }; /* Callback from procfs to read out objcount information. * Walk through the entries in the sctp_dbg_objcnt array, dumping * the raw object counts for each monitored type. */ static int sctp_objcnt_seq_show(struct seq_file *seq, void *v) { int i, len; i = (int)*(loff_t *)v; seq_printf(seq, "%s: %d%n", sctp_dbg_objcnt[i].label, atomic_read(sctp_dbg_objcnt[i].counter), &len); seq_printf(seq, "%*s\n", 127 - len, ""); return 0; } static void *sctp_objcnt_seq_start(struct seq_file *seq, loff_t *pos) { return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos; } static void sctp_objcnt_seq_stop(struct seq_file *seq, void *v) { } static void * sctp_objcnt_seq_next(struct seq_file *seq, void *v, loff_t *pos) { ++*pos; return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos; } static const struct seq_operations sctp_objcnt_seq_ops = { .start = sctp_objcnt_seq_start, .next = sctp_objcnt_seq_next, .stop = sctp_objcnt_seq_stop, .show = sctp_objcnt_seq_show, }; static int sctp_objcnt_seq_open(struct inode *inode, struct file *file) { return seq_open(file, &sctp_objcnt_seq_ops); } static const struct file_operations sctp_objcnt_ops = { .open = sctp_objcnt_seq_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release, }; /* Initialize the objcount in the proc filesystem. */ void sctp_dbg_objcnt_init(void) { struct proc_dir_entry *ent; ent = proc_create("sctp_dbg_objcnt", 0, proc_net_sctp, &sctp_objcnt_ops); if (!ent) pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n"); } /* Cleanup the objcount entry in the proc filesystem. */ void sctp_dbg_objcnt_exit(void) { remove_proc_entry("sctp_dbg_objcnt", proc_net_sctp); }