cregit-Linux how code gets into the kernel

Release 4.11 net/sctp/objcnt.c

Directory: net/sctp
/* 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, see
 * <http://www.gnu.org/licenses/>.
 *
 * Please send any bug reports or fixes you make to the
 * email address(es):
 *    lksctp developers <linux-sctp@vger.kernel.org>
 *
 * Written or modified by:
 *    Jon Grimm             <jgrimm@us.ibm.com>
 */


#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(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(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; i = (int)*(loff_t *)v; seq_setwidth(seq, 127); seq_printf(seq, "%s: %d", sctp_dbg_objcnt[i].label, atomic_read(sctp_dbg_objcnt[i].counter)); seq_pad(seq, '\n'); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jon Grimm4056.34%125.00%
Pavel Emelyanov2129.58%250.00%
Tetsuo Handa1014.08%125.00%
Total71100.00%4100.00%


static void *sctp_objcnt_seq_start(struct seq_file *seq, loff_t *pos) { return (*pos >= ARRAY_SIZE(sctp_dbg_objcnt)) ? NULL : (void *)pos; }

Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov3291.43%150.00%
Jon Grimm38.57%150.00%
Total35100.00%2100.00%


static void sctp_objcnt_seq_stop(struct seq_file *seq, void *v) { }

Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov14100.00%1100.00%
Total14100.00%1100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov3888.37%150.00%
Jon Grimm511.63%150.00%
Total43100.00%2100.00%

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); }

Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov2288.00%150.00%
Jon Grimm312.00%150.00%
Total25100.00%2100.00%

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(struct net *net) { struct proc_dir_entry *ent; ent = proc_create("sctp_dbg_objcnt", 0, net->sctp.proc_net_sctp, &sctp_objcnt_ops); if (!ent) pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n"); }

Contributors

PersonTokensPropCommitsCommitProp
Christophe Lucas1637.21%120.00%
Jon Grimm1432.56%120.00%
Eric W. Biedermann818.60%120.00%
Wang Chen49.30%120.00%
Joe Perches12.33%120.00%
Total43100.00%5100.00%

/* Cleanup the objcount entry in the proc filesystem. */
void sctp_dbg_objcnt_exit(struct net *net) { remove_proc_entry("sctp_dbg_objcnt", net->sctp.proc_net_sctp); }

Contributors

PersonTokensPropCommitsCommitProp
Jon Grimm1257.14%133.33%
Eric W. Biedermann838.10%133.33%
Sridhar Samudrala14.76%133.33%
Total21100.00%3100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Pavel Emelyanov18342.17%211.76%
Jon Grimm17740.78%423.53%
Christophe Lucas163.69%15.88%
Eric W. Biedermann163.69%15.88%
Vladislav Yasevich102.30%15.88%
Tetsuo Handa102.30%15.88%
Joe Perches81.84%15.88%
David S. Miller40.92%15.88%
Wang Chen40.92%15.88%
Andries E. Brouwer30.69%15.88%
Sridhar Samudrala20.46%211.76%
Jeff Kirsher10.23%15.88%
Total434100.00%17100.00%
Directory: net/sctp
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