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2c257e96df
Replace the specification of a data structure by a pointer dereference as the parameter for the operator "sizeof" to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: David Teigland <teigland@redhat.com>
825 lines
18 KiB
C
825 lines
18 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) 2005-2009 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include <linux/pagemap.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/ctype.h>
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#include <linux/debugfs.h>
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#include <linux/slab.h>
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#include "dlm_internal.h"
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#include "lock.h"
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#define DLM_DEBUG_BUF_LEN 4096
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static char debug_buf[DLM_DEBUG_BUF_LEN];
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static struct mutex debug_buf_lock;
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static struct dentry *dlm_root;
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static char *print_lockmode(int mode)
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{
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switch (mode) {
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case DLM_LOCK_IV:
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return "--";
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case DLM_LOCK_NL:
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return "NL";
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case DLM_LOCK_CR:
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return "CR";
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case DLM_LOCK_CW:
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return "CW";
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case DLM_LOCK_PR:
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return "PR";
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case DLM_LOCK_PW:
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return "PW";
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case DLM_LOCK_EX:
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return "EX";
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default:
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return "??";
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}
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}
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static void print_format1_lock(struct seq_file *s, struct dlm_lkb *lkb,
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struct dlm_rsb *res)
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{
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seq_printf(s, "%08x %s", lkb->lkb_id, print_lockmode(lkb->lkb_grmode));
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if (lkb->lkb_status == DLM_LKSTS_CONVERT ||
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lkb->lkb_status == DLM_LKSTS_WAITING)
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seq_printf(s, " (%s)", print_lockmode(lkb->lkb_rqmode));
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if (lkb->lkb_nodeid) {
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if (lkb->lkb_nodeid != res->res_nodeid)
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seq_printf(s, " Remote: %3d %08x", lkb->lkb_nodeid,
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lkb->lkb_remid);
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else
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seq_printf(s, " Master: %08x", lkb->lkb_remid);
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}
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if (lkb->lkb_wait_type)
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seq_printf(s, " wait_type: %d", lkb->lkb_wait_type);
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seq_putc(s, '\n');
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}
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static void print_format1(struct dlm_rsb *res, struct seq_file *s)
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{
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struct dlm_lkb *lkb;
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int i, lvblen = res->res_ls->ls_lvblen, recover_list, root_list;
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lock_rsb(res);
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seq_printf(s, "\nResource %p Name (len=%d) \"", res, res->res_length);
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for (i = 0; i < res->res_length; i++) {
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if (isprint(res->res_name[i]))
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seq_printf(s, "%c", res->res_name[i]);
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else
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seq_printf(s, "%c", '.');
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}
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if (res->res_nodeid > 0)
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seq_printf(s, "\"\nLocal Copy, Master is node %d\n",
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res->res_nodeid);
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else if (res->res_nodeid == 0)
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seq_puts(s, "\"\nMaster Copy\n");
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else if (res->res_nodeid == -1)
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seq_printf(s, "\"\nLooking up master (lkid %x)\n",
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res->res_first_lkid);
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else
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seq_printf(s, "\"\nInvalid master %d\n", res->res_nodeid);
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if (seq_has_overflowed(s))
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goto out;
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/* Print the LVB: */
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if (res->res_lvbptr) {
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seq_puts(s, "LVB: ");
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for (i = 0; i < lvblen; i++) {
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if (i == lvblen / 2)
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seq_puts(s, "\n ");
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seq_printf(s, "%02x ",
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(unsigned char) res->res_lvbptr[i]);
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}
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if (rsb_flag(res, RSB_VALNOTVALID))
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seq_puts(s, " (INVALID)");
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seq_putc(s, '\n');
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if (seq_has_overflowed(s))
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goto out;
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}
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root_list = !list_empty(&res->res_root_list);
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recover_list = !list_empty(&res->res_recover_list);
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if (root_list || recover_list) {
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seq_printf(s, "Recovery: root %d recover %d flags %lx count %d\n",
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root_list, recover_list,
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res->res_flags, res->res_recover_locks_count);
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}
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/* Print the locks attached to this resource */
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seq_puts(s, "Granted Queue\n");
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list_for_each_entry(lkb, &res->res_grantqueue, lkb_statequeue) {
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print_format1_lock(s, lkb, res);
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if (seq_has_overflowed(s))
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goto out;
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}
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seq_puts(s, "Conversion Queue\n");
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list_for_each_entry(lkb, &res->res_convertqueue, lkb_statequeue) {
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print_format1_lock(s, lkb, res);
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if (seq_has_overflowed(s))
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goto out;
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}
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seq_puts(s, "Waiting Queue\n");
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list_for_each_entry(lkb, &res->res_waitqueue, lkb_statequeue) {
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print_format1_lock(s, lkb, res);
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if (seq_has_overflowed(s))
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goto out;
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}
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if (list_empty(&res->res_lookup))
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goto out;
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seq_puts(s, "Lookup Queue\n");
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list_for_each_entry(lkb, &res->res_lookup, lkb_rsb_lookup) {
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seq_printf(s, "%08x %s",
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lkb->lkb_id, print_lockmode(lkb->lkb_rqmode));
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if (lkb->lkb_wait_type)
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seq_printf(s, " wait_type: %d", lkb->lkb_wait_type);
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seq_putc(s, '\n');
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if (seq_has_overflowed(s))
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goto out;
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}
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out:
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unlock_rsb(res);
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}
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static void print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb,
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struct dlm_rsb *r)
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{
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u64 xid = 0;
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u64 us;
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if (lkb->lkb_flags & DLM_IFL_USER) {
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if (lkb->lkb_ua)
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xid = lkb->lkb_ua->xid;
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}
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/* microseconds since lkb was added to current queue */
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us = ktime_to_us(ktime_sub(ktime_get(), lkb->lkb_timestamp));
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/* id nodeid remid pid xid exflags flags sts grmode rqmode time_us
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r_nodeid r_len r_name */
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seq_printf(s, "%x %d %x %u %llu %x %x %d %d %d %llu %u %d \"%s\"\n",
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lkb->lkb_id,
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lkb->lkb_nodeid,
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lkb->lkb_remid,
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lkb->lkb_ownpid,
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(unsigned long long)xid,
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lkb->lkb_exflags,
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lkb->lkb_flags,
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lkb->lkb_status,
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lkb->lkb_grmode,
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lkb->lkb_rqmode,
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(unsigned long long)us,
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r->res_nodeid,
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r->res_length,
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r->res_name);
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}
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static void print_format2(struct dlm_rsb *r, struct seq_file *s)
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{
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struct dlm_lkb *lkb;
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lock_rsb(r);
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list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) {
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print_format2_lock(s, lkb, r);
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if (seq_has_overflowed(s))
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goto out;
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}
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list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue) {
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print_format2_lock(s, lkb, r);
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if (seq_has_overflowed(s))
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goto out;
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}
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list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue) {
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print_format2_lock(s, lkb, r);
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if (seq_has_overflowed(s))
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goto out;
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}
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out:
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unlock_rsb(r);
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}
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static void print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb,
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int rsb_lookup)
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{
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u64 xid = 0;
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if (lkb->lkb_flags & DLM_IFL_USER) {
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if (lkb->lkb_ua)
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xid = lkb->lkb_ua->xid;
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}
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seq_printf(s, "lkb %x %d %x %u %llu %x %x %d %d %d %d %d %d %u %llu %llu\n",
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lkb->lkb_id,
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lkb->lkb_nodeid,
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lkb->lkb_remid,
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lkb->lkb_ownpid,
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(unsigned long long)xid,
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lkb->lkb_exflags,
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lkb->lkb_flags,
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lkb->lkb_status,
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lkb->lkb_grmode,
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lkb->lkb_rqmode,
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lkb->lkb_last_bast.mode,
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rsb_lookup,
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lkb->lkb_wait_type,
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lkb->lkb_lvbseq,
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(unsigned long long)ktime_to_ns(lkb->lkb_timestamp),
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(unsigned long long)ktime_to_ns(lkb->lkb_last_bast_time));
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}
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static void print_format3(struct dlm_rsb *r, struct seq_file *s)
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{
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struct dlm_lkb *lkb;
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int i, lvblen = r->res_ls->ls_lvblen;
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int print_name = 1;
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lock_rsb(r);
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seq_printf(s, "rsb %p %d %x %lx %d %d %u %d ",
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r,
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r->res_nodeid,
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r->res_first_lkid,
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r->res_flags,
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!list_empty(&r->res_root_list),
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!list_empty(&r->res_recover_list),
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r->res_recover_locks_count,
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r->res_length);
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if (seq_has_overflowed(s))
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goto out;
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for (i = 0; i < r->res_length; i++) {
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if (!isascii(r->res_name[i]) || !isprint(r->res_name[i]))
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print_name = 0;
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}
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seq_puts(s, print_name ? "str " : "hex");
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for (i = 0; i < r->res_length; i++) {
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if (print_name)
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seq_printf(s, "%c", r->res_name[i]);
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else
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seq_printf(s, " %02x", (unsigned char)r->res_name[i]);
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}
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seq_putc(s, '\n');
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if (seq_has_overflowed(s))
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goto out;
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if (!r->res_lvbptr)
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goto do_locks;
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seq_printf(s, "lvb %u %d", r->res_lvbseq, lvblen);
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for (i = 0; i < lvblen; i++)
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seq_printf(s, " %02x", (unsigned char)r->res_lvbptr[i]);
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seq_putc(s, '\n');
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if (seq_has_overflowed(s))
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goto out;
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do_locks:
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list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue) {
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print_format3_lock(s, lkb, 0);
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if (seq_has_overflowed(s))
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goto out;
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}
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list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue) {
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print_format3_lock(s, lkb, 0);
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if (seq_has_overflowed(s))
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goto out;
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}
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list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue) {
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print_format3_lock(s, lkb, 0);
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if (seq_has_overflowed(s))
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goto out;
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}
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list_for_each_entry(lkb, &r->res_lookup, lkb_rsb_lookup) {
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print_format3_lock(s, lkb, 1);
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if (seq_has_overflowed(s))
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goto out;
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}
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out:
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unlock_rsb(r);
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}
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static void print_format4(struct dlm_rsb *r, struct seq_file *s)
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{
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int our_nodeid = dlm_our_nodeid();
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int print_name = 1;
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int i;
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lock_rsb(r);
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seq_printf(s, "rsb %p %d %d %d %d %lu %lx %d ",
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r,
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r->res_nodeid,
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r->res_master_nodeid,
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r->res_dir_nodeid,
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our_nodeid,
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r->res_toss_time,
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r->res_flags,
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r->res_length);
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for (i = 0; i < r->res_length; i++) {
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if (!isascii(r->res_name[i]) || !isprint(r->res_name[i]))
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print_name = 0;
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}
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seq_puts(s, print_name ? "str " : "hex");
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for (i = 0; i < r->res_length; i++) {
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if (print_name)
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seq_printf(s, "%c", r->res_name[i]);
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else
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seq_printf(s, " %02x", (unsigned char)r->res_name[i]);
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}
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seq_putc(s, '\n');
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unlock_rsb(r);
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}
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struct rsbtbl_iter {
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struct dlm_rsb *rsb;
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unsigned bucket;
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int format;
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int header;
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};
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/*
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* If the buffer is full, seq_printf can be called again, but it
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* does nothing. So, the these printing routines periodically check
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* seq_has_overflowed to avoid wasting too much time trying to print to
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* a full buffer.
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*/
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static int table_seq_show(struct seq_file *seq, void *iter_ptr)
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{
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struct rsbtbl_iter *ri = iter_ptr;
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switch (ri->format) {
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case 1:
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print_format1(ri->rsb, seq);
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break;
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case 2:
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if (ri->header) {
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seq_puts(seq, "id nodeid remid pid xid exflags flags sts grmode rqmode time_ms r_nodeid r_len r_name\n");
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ri->header = 0;
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}
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print_format2(ri->rsb, seq);
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break;
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case 3:
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if (ri->header) {
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seq_puts(seq, "version rsb 1.1 lvb 1.1 lkb 1.1\n");
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ri->header = 0;
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}
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print_format3(ri->rsb, seq);
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break;
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case 4:
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if (ri->header) {
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seq_puts(seq, "version 4 rsb 2\n");
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ri->header = 0;
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}
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print_format4(ri->rsb, seq);
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break;
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}
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return 0;
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}
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static const struct seq_operations format1_seq_ops;
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static const struct seq_operations format2_seq_ops;
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static const struct seq_operations format3_seq_ops;
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static const struct seq_operations format4_seq_ops;
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static void *table_seq_start(struct seq_file *seq, loff_t *pos)
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{
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struct rb_root *tree;
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struct rb_node *node;
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struct dlm_ls *ls = seq->private;
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struct rsbtbl_iter *ri;
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struct dlm_rsb *r;
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loff_t n = *pos;
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unsigned bucket, entry;
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int toss = (seq->op == &format4_seq_ops);
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bucket = n >> 32;
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entry = n & ((1LL << 32) - 1);
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if (bucket >= ls->ls_rsbtbl_size)
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return NULL;
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ri = kzalloc(sizeof(*ri), GFP_NOFS);
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if (!ri)
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return NULL;
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if (n == 0)
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ri->header = 1;
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if (seq->op == &format1_seq_ops)
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ri->format = 1;
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if (seq->op == &format2_seq_ops)
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ri->format = 2;
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if (seq->op == &format3_seq_ops)
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ri->format = 3;
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if (seq->op == &format4_seq_ops)
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ri->format = 4;
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tree = toss ? &ls->ls_rsbtbl[bucket].toss : &ls->ls_rsbtbl[bucket].keep;
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spin_lock(&ls->ls_rsbtbl[bucket].lock);
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if (!RB_EMPTY_ROOT(tree)) {
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for (node = rb_first(tree); node; node = rb_next(node)) {
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r = rb_entry(node, struct dlm_rsb, res_hashnode);
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if (!entry--) {
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dlm_hold_rsb(r);
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ri->rsb = r;
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ri->bucket = bucket;
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spin_unlock(&ls->ls_rsbtbl[bucket].lock);
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return ri;
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}
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}
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}
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spin_unlock(&ls->ls_rsbtbl[bucket].lock);
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/*
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* move to the first rsb in the next non-empty bucket
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*/
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/* zero the entry */
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n &= ~((1LL << 32) - 1);
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while (1) {
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bucket++;
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n += 1LL << 32;
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if (bucket >= ls->ls_rsbtbl_size) {
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kfree(ri);
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return NULL;
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}
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tree = toss ? &ls->ls_rsbtbl[bucket].toss : &ls->ls_rsbtbl[bucket].keep;
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spin_lock(&ls->ls_rsbtbl[bucket].lock);
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if (!RB_EMPTY_ROOT(tree)) {
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node = rb_first(tree);
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r = rb_entry(node, struct dlm_rsb, res_hashnode);
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dlm_hold_rsb(r);
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ri->rsb = r;
|
|
ri->bucket = bucket;
|
|
spin_unlock(&ls->ls_rsbtbl[bucket].lock);
|
|
*pos = n;
|
|
return ri;
|
|
}
|
|
spin_unlock(&ls->ls_rsbtbl[bucket].lock);
|
|
}
|
|
}
|
|
|
|
static void *table_seq_next(struct seq_file *seq, void *iter_ptr, loff_t *pos)
|
|
{
|
|
struct dlm_ls *ls = seq->private;
|
|
struct rsbtbl_iter *ri = iter_ptr;
|
|
struct rb_root *tree;
|
|
struct rb_node *next;
|
|
struct dlm_rsb *r, *rp;
|
|
loff_t n = *pos;
|
|
unsigned bucket;
|
|
int toss = (seq->op == &format4_seq_ops);
|
|
|
|
bucket = n >> 32;
|
|
|
|
/*
|
|
* move to the next rsb in the same bucket
|
|
*/
|
|
|
|
spin_lock(&ls->ls_rsbtbl[bucket].lock);
|
|
rp = ri->rsb;
|
|
next = rb_next(&rp->res_hashnode);
|
|
|
|
if (next) {
|
|
r = rb_entry(next, struct dlm_rsb, res_hashnode);
|
|
dlm_hold_rsb(r);
|
|
ri->rsb = r;
|
|
spin_unlock(&ls->ls_rsbtbl[bucket].lock);
|
|
dlm_put_rsb(rp);
|
|
++*pos;
|
|
return ri;
|
|
}
|
|
spin_unlock(&ls->ls_rsbtbl[bucket].lock);
|
|
dlm_put_rsb(rp);
|
|
|
|
/*
|
|
* move to the first rsb in the next non-empty bucket
|
|
*/
|
|
|
|
/* zero the entry */
|
|
n &= ~((1LL << 32) - 1);
|
|
|
|
while (1) {
|
|
bucket++;
|
|
n += 1LL << 32;
|
|
|
|
if (bucket >= ls->ls_rsbtbl_size) {
|
|
kfree(ri);
|
|
return NULL;
|
|
}
|
|
tree = toss ? &ls->ls_rsbtbl[bucket].toss : &ls->ls_rsbtbl[bucket].keep;
|
|
|
|
spin_lock(&ls->ls_rsbtbl[bucket].lock);
|
|
if (!RB_EMPTY_ROOT(tree)) {
|
|
next = rb_first(tree);
|
|
r = rb_entry(next, struct dlm_rsb, res_hashnode);
|
|
dlm_hold_rsb(r);
|
|
ri->rsb = r;
|
|
ri->bucket = bucket;
|
|
spin_unlock(&ls->ls_rsbtbl[bucket].lock);
|
|
*pos = n;
|
|
return ri;
|
|
}
|
|
spin_unlock(&ls->ls_rsbtbl[bucket].lock);
|
|
}
|
|
}
|
|
|
|
static void table_seq_stop(struct seq_file *seq, void *iter_ptr)
|
|
{
|
|
struct rsbtbl_iter *ri = iter_ptr;
|
|
|
|
if (ri) {
|
|
dlm_put_rsb(ri->rsb);
|
|
kfree(ri);
|
|
}
|
|
}
|
|
|
|
static const struct seq_operations format1_seq_ops = {
|
|
.start = table_seq_start,
|
|
.next = table_seq_next,
|
|
.stop = table_seq_stop,
|
|
.show = table_seq_show,
|
|
};
|
|
|
|
static const struct seq_operations format2_seq_ops = {
|
|
.start = table_seq_start,
|
|
.next = table_seq_next,
|
|
.stop = table_seq_stop,
|
|
.show = table_seq_show,
|
|
};
|
|
|
|
static const struct seq_operations format3_seq_ops = {
|
|
.start = table_seq_start,
|
|
.next = table_seq_next,
|
|
.stop = table_seq_stop,
|
|
.show = table_seq_show,
|
|
};
|
|
|
|
static const struct seq_operations format4_seq_ops = {
|
|
.start = table_seq_start,
|
|
.next = table_seq_next,
|
|
.stop = table_seq_stop,
|
|
.show = table_seq_show,
|
|
};
|
|
|
|
static const struct file_operations format1_fops;
|
|
static const struct file_operations format2_fops;
|
|
static const struct file_operations format3_fops;
|
|
static const struct file_operations format4_fops;
|
|
|
|
static int table_open1(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int ret;
|
|
|
|
ret = seq_open(file, &format1_seq_ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seq = file->private_data;
|
|
seq->private = inode->i_private; /* the dlm_ls */
|
|
return 0;
|
|
}
|
|
|
|
static int table_open2(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int ret;
|
|
|
|
ret = seq_open(file, &format2_seq_ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seq = file->private_data;
|
|
seq->private = inode->i_private; /* the dlm_ls */
|
|
return 0;
|
|
}
|
|
|
|
static int table_open3(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int ret;
|
|
|
|
ret = seq_open(file, &format3_seq_ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seq = file->private_data;
|
|
seq->private = inode->i_private; /* the dlm_ls */
|
|
return 0;
|
|
}
|
|
|
|
static int table_open4(struct inode *inode, struct file *file)
|
|
{
|
|
struct seq_file *seq;
|
|
int ret;
|
|
|
|
ret = seq_open(file, &format4_seq_ops);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seq = file->private_data;
|
|
seq->private = inode->i_private; /* the dlm_ls */
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations format1_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = table_open1,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release
|
|
};
|
|
|
|
static const struct file_operations format2_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = table_open2,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release
|
|
};
|
|
|
|
static const struct file_operations format3_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = table_open3,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release
|
|
};
|
|
|
|
static const struct file_operations format4_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = table_open4,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = seq_release
|
|
};
|
|
|
|
/*
|
|
* dump lkb's on the ls_waiters list
|
|
*/
|
|
static ssize_t waiters_read(struct file *file, char __user *userbuf,
|
|
size_t count, loff_t *ppos)
|
|
{
|
|
struct dlm_ls *ls = file->private_data;
|
|
struct dlm_lkb *lkb;
|
|
size_t len = DLM_DEBUG_BUF_LEN, pos = 0, ret, rv;
|
|
|
|
mutex_lock(&debug_buf_lock);
|
|
mutex_lock(&ls->ls_waiters_mutex);
|
|
memset(debug_buf, 0, sizeof(debug_buf));
|
|
|
|
list_for_each_entry(lkb, &ls->ls_waiters, lkb_wait_reply) {
|
|
ret = snprintf(debug_buf + pos, len - pos, "%x %d %d %s\n",
|
|
lkb->lkb_id, lkb->lkb_wait_type,
|
|
lkb->lkb_nodeid, lkb->lkb_resource->res_name);
|
|
if (ret >= len - pos)
|
|
break;
|
|
pos += ret;
|
|
}
|
|
mutex_unlock(&ls->ls_waiters_mutex);
|
|
|
|
rv = simple_read_from_buffer(userbuf, count, ppos, debug_buf, pos);
|
|
mutex_unlock(&debug_buf_lock);
|
|
return rv;
|
|
}
|
|
|
|
static const struct file_operations waiters_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = simple_open,
|
|
.read = waiters_read,
|
|
.llseek = default_llseek,
|
|
};
|
|
|
|
void dlm_delete_debug_file(struct dlm_ls *ls)
|
|
{
|
|
debugfs_remove(ls->ls_debug_rsb_dentry);
|
|
debugfs_remove(ls->ls_debug_waiters_dentry);
|
|
debugfs_remove(ls->ls_debug_locks_dentry);
|
|
debugfs_remove(ls->ls_debug_all_dentry);
|
|
debugfs_remove(ls->ls_debug_toss_dentry);
|
|
}
|
|
|
|
int dlm_create_debug_file(struct dlm_ls *ls)
|
|
{
|
|
char name[DLM_LOCKSPACE_LEN + 8];
|
|
|
|
/* format 1 */
|
|
|
|
ls->ls_debug_rsb_dentry = debugfs_create_file(ls->ls_name,
|
|
S_IFREG | S_IRUGO,
|
|
dlm_root,
|
|
ls,
|
|
&format1_fops);
|
|
if (!ls->ls_debug_rsb_dentry)
|
|
goto fail;
|
|
|
|
/* format 2 */
|
|
|
|
memset(name, 0, sizeof(name));
|
|
snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_locks", ls->ls_name);
|
|
|
|
ls->ls_debug_locks_dentry = debugfs_create_file(name,
|
|
S_IFREG | S_IRUGO,
|
|
dlm_root,
|
|
ls,
|
|
&format2_fops);
|
|
if (!ls->ls_debug_locks_dentry)
|
|
goto fail;
|
|
|
|
/* format 3 */
|
|
|
|
memset(name, 0, sizeof(name));
|
|
snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_all", ls->ls_name);
|
|
|
|
ls->ls_debug_all_dentry = debugfs_create_file(name,
|
|
S_IFREG | S_IRUGO,
|
|
dlm_root,
|
|
ls,
|
|
&format3_fops);
|
|
if (!ls->ls_debug_all_dentry)
|
|
goto fail;
|
|
|
|
/* format 4 */
|
|
|
|
memset(name, 0, sizeof(name));
|
|
snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_toss", ls->ls_name);
|
|
|
|
ls->ls_debug_toss_dentry = debugfs_create_file(name,
|
|
S_IFREG | S_IRUGO,
|
|
dlm_root,
|
|
ls,
|
|
&format4_fops);
|
|
if (!ls->ls_debug_toss_dentry)
|
|
goto fail;
|
|
|
|
memset(name, 0, sizeof(name));
|
|
snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_waiters", ls->ls_name);
|
|
|
|
ls->ls_debug_waiters_dentry = debugfs_create_file(name,
|
|
S_IFREG | S_IRUGO,
|
|
dlm_root,
|
|
ls,
|
|
&waiters_fops);
|
|
if (!ls->ls_debug_waiters_dentry)
|
|
goto fail;
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
dlm_delete_debug_file(ls);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
int __init dlm_register_debugfs(void)
|
|
{
|
|
mutex_init(&debug_buf_lock);
|
|
dlm_root = debugfs_create_dir("dlm", NULL);
|
|
return dlm_root ? 0 : -ENOMEM;
|
|
}
|
|
|
|
void dlm_unregister_debugfs(void)
|
|
{
|
|
debugfs_remove(dlm_root);
|
|
}
|
|
|