959 строки
28 KiB
C
959 строки
28 KiB
C
#define pr_fmt(fmt) "drbd debugfs: " fmt
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/stat.h>
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#include <linux/jiffies.h>
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#include <linux/list.h>
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#include "drbd_int.h"
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#include "drbd_req.h"
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#include "drbd_debugfs.h"
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/**********************************************************************
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* Whenever you change the file format, remember to bump the version. *
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**********************************************************************/
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static struct dentry *drbd_debugfs_root;
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static struct dentry *drbd_debugfs_version;
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static struct dentry *drbd_debugfs_resources;
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static struct dentry *drbd_debugfs_minors;
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static void seq_print_age_or_dash(struct seq_file *m, bool valid, unsigned long dt)
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{
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if (valid)
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seq_printf(m, "\t%d", jiffies_to_msecs(dt));
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else
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seq_printf(m, "\t-");
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}
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static void __seq_print_rq_state_bit(struct seq_file *m,
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bool is_set, char *sep, const char *set_name, const char *unset_name)
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{
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if (is_set && set_name) {
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seq_putc(m, *sep);
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seq_puts(m, set_name);
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*sep = '|';
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} else if (!is_set && unset_name) {
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seq_putc(m, *sep);
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seq_puts(m, unset_name);
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*sep = '|';
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}
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}
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static void seq_print_rq_state_bit(struct seq_file *m,
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bool is_set, char *sep, const char *set_name)
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{
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__seq_print_rq_state_bit(m, is_set, sep, set_name, NULL);
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}
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/* pretty print enum drbd_req_state_bits req->rq_state */
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static void seq_print_request_state(struct seq_file *m, struct drbd_request *req)
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{
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unsigned int s = req->rq_state;
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char sep = ' ';
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seq_printf(m, "\t0x%08x", s);
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seq_printf(m, "\tmaster: %s", req->master_bio ? "pending" : "completed");
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/* RQ_WRITE ignored, already reported */
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seq_puts(m, "\tlocal:");
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seq_print_rq_state_bit(m, s & RQ_IN_ACT_LOG, &sep, "in-AL");
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seq_print_rq_state_bit(m, s & RQ_POSTPONED, &sep, "postponed");
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seq_print_rq_state_bit(m, s & RQ_COMPLETION_SUSP, &sep, "suspended");
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sep = ' ';
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seq_print_rq_state_bit(m, s & RQ_LOCAL_PENDING, &sep, "pending");
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seq_print_rq_state_bit(m, s & RQ_LOCAL_COMPLETED, &sep, "completed");
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seq_print_rq_state_bit(m, s & RQ_LOCAL_ABORTED, &sep, "aborted");
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seq_print_rq_state_bit(m, s & RQ_LOCAL_OK, &sep, "ok");
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if (sep == ' ')
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seq_puts(m, " -");
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/* for_each_connection ... */
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seq_printf(m, "\tnet:");
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sep = ' ';
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seq_print_rq_state_bit(m, s & RQ_NET_PENDING, &sep, "pending");
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seq_print_rq_state_bit(m, s & RQ_NET_QUEUED, &sep, "queued");
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seq_print_rq_state_bit(m, s & RQ_NET_SENT, &sep, "sent");
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seq_print_rq_state_bit(m, s & RQ_NET_DONE, &sep, "done");
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seq_print_rq_state_bit(m, s & RQ_NET_SIS, &sep, "sis");
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seq_print_rq_state_bit(m, s & RQ_NET_OK, &sep, "ok");
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if (sep == ' ')
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seq_puts(m, " -");
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seq_printf(m, " :");
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sep = ' ';
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seq_print_rq_state_bit(m, s & RQ_EXP_RECEIVE_ACK, &sep, "B");
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seq_print_rq_state_bit(m, s & RQ_EXP_WRITE_ACK, &sep, "C");
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seq_print_rq_state_bit(m, s & RQ_EXP_BARR_ACK, &sep, "barr");
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if (sep == ' ')
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seq_puts(m, " -");
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seq_printf(m, "\n");
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}
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static void seq_print_one_request(struct seq_file *m, struct drbd_request *req, unsigned long now)
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{
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/* change anything here, fixup header below! */
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unsigned int s = req->rq_state;
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#define RQ_HDR_1 "epoch\tsector\tsize\trw"
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seq_printf(m, "0x%x\t%llu\t%u\t%s",
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req->epoch,
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(unsigned long long)req->i.sector, req->i.size >> 9,
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(s & RQ_WRITE) ? "W" : "R");
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#define RQ_HDR_2 "\tstart\tin AL\tsubmit"
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seq_printf(m, "\t%d", jiffies_to_msecs(now - req->start_jif));
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seq_print_age_or_dash(m, s & RQ_IN_ACT_LOG, now - req->in_actlog_jif);
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seq_print_age_or_dash(m, s & RQ_LOCAL_PENDING, now - req->pre_submit_jif);
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#define RQ_HDR_3 "\tsent\tacked\tdone"
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seq_print_age_or_dash(m, s & RQ_NET_SENT, now - req->pre_send_jif);
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seq_print_age_or_dash(m, (s & RQ_NET_SENT) && !(s & RQ_NET_PENDING), now - req->acked_jif);
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seq_print_age_or_dash(m, s & RQ_NET_DONE, now - req->net_done_jif);
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#define RQ_HDR_4 "\tstate\n"
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seq_print_request_state(m, req);
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}
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#define RQ_HDR RQ_HDR_1 RQ_HDR_2 RQ_HDR_3 RQ_HDR_4
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static void seq_print_minor_vnr_req(struct seq_file *m, struct drbd_request *req, unsigned long now)
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{
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seq_printf(m, "%u\t%u\t", req->device->minor, req->device->vnr);
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seq_print_one_request(m, req, now);
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}
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static void seq_print_resource_pending_meta_io(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
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{
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struct drbd_device *device;
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unsigned int i;
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seq_puts(m, "minor\tvnr\tstart\tsubmit\tintent\n");
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rcu_read_lock();
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idr_for_each_entry(&resource->devices, device, i) {
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struct drbd_md_io tmp;
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/* In theory this is racy,
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* in the sense that there could have been a
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* drbd_md_put_buffer(); drbd_md_get_buffer();
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* between accessing these members here. */
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tmp = device->md_io;
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if (atomic_read(&tmp.in_use)) {
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seq_printf(m, "%u\t%u\t%d\t",
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device->minor, device->vnr,
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jiffies_to_msecs(now - tmp.start_jif));
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if (time_before(tmp.submit_jif, tmp.start_jif))
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seq_puts(m, "-\t");
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else
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seq_printf(m, "%d\t", jiffies_to_msecs(now - tmp.submit_jif));
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seq_printf(m, "%s\n", tmp.current_use);
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}
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}
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rcu_read_unlock();
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}
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static void seq_print_waiting_for_AL(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
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{
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struct drbd_device *device;
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unsigned int i;
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seq_puts(m, "minor\tvnr\tage\t#waiting\n");
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rcu_read_lock();
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idr_for_each_entry(&resource->devices, device, i) {
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unsigned long jif;
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struct drbd_request *req;
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int n = atomic_read(&device->ap_actlog_cnt);
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if (n) {
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spin_lock_irq(&device->resource->req_lock);
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req = list_first_entry_or_null(&device->pending_master_completion[1],
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struct drbd_request, req_pending_master_completion);
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/* if the oldest request does not wait for the activity log
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* it is not interesting for us here */
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if (req && !(req->rq_state & RQ_IN_ACT_LOG))
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jif = req->start_jif;
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else
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req = NULL;
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spin_unlock_irq(&device->resource->req_lock);
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}
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if (n) {
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seq_printf(m, "%u\t%u\t", device->minor, device->vnr);
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if (req)
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seq_printf(m, "%u\t", jiffies_to_msecs(now - jif));
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else
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seq_puts(m, "-\t");
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seq_printf(m, "%u\n", n);
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}
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}
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rcu_read_unlock();
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}
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static void seq_print_device_bitmap_io(struct seq_file *m, struct drbd_device *device, unsigned long now)
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{
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struct drbd_bm_aio_ctx *ctx;
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unsigned long start_jif;
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unsigned int in_flight;
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unsigned int flags;
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spin_lock_irq(&device->resource->req_lock);
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ctx = list_first_entry_or_null(&device->pending_bitmap_io, struct drbd_bm_aio_ctx, list);
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if (ctx && ctx->done)
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ctx = NULL;
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if (ctx) {
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start_jif = ctx->start_jif;
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in_flight = atomic_read(&ctx->in_flight);
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flags = ctx->flags;
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}
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spin_unlock_irq(&device->resource->req_lock);
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if (ctx) {
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seq_printf(m, "%u\t%u\t%c\t%u\t%u\n",
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device->minor, device->vnr,
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(flags & BM_AIO_READ) ? 'R' : 'W',
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jiffies_to_msecs(now - start_jif),
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in_flight);
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}
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}
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static void seq_print_resource_pending_bitmap_io(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
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{
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struct drbd_device *device;
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unsigned int i;
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seq_puts(m, "minor\tvnr\trw\tage\t#in-flight\n");
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rcu_read_lock();
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idr_for_each_entry(&resource->devices, device, i) {
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seq_print_device_bitmap_io(m, device, now);
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}
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rcu_read_unlock();
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}
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/* pretty print enum peer_req->flags */
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static void seq_print_peer_request_flags(struct seq_file *m, struct drbd_peer_request *peer_req)
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{
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unsigned long f = peer_req->flags;
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char sep = ' ';
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__seq_print_rq_state_bit(m, f & EE_SUBMITTED, &sep, "submitted", "preparing");
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__seq_print_rq_state_bit(m, f & EE_APPLICATION, &sep, "application", "internal");
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seq_print_rq_state_bit(m, f & EE_CALL_AL_COMPLETE_IO, &sep, "in-AL");
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seq_print_rq_state_bit(m, f & EE_SEND_WRITE_ACK, &sep, "C");
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seq_print_rq_state_bit(m, f & EE_MAY_SET_IN_SYNC, &sep, "set-in-sync");
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if (f & EE_IS_TRIM) {
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seq_putc(m, sep);
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sep = '|';
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if (f & EE_IS_TRIM_USE_ZEROOUT)
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seq_puts(m, "zero-out");
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else
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seq_puts(m, "trim");
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}
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seq_putc(m, '\n');
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}
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static void seq_print_peer_request(struct seq_file *m,
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struct drbd_device *device, struct list_head *lh,
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unsigned long now)
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{
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bool reported_preparing = false;
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struct drbd_peer_request *peer_req;
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list_for_each_entry(peer_req, lh, w.list) {
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if (reported_preparing && !(peer_req->flags & EE_SUBMITTED))
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continue;
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if (device)
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seq_printf(m, "%u\t%u\t", device->minor, device->vnr);
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seq_printf(m, "%llu\t%u\t%c\t%u\t",
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(unsigned long long)peer_req->i.sector, peer_req->i.size >> 9,
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(peer_req->flags & EE_WRITE) ? 'W' : 'R',
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jiffies_to_msecs(now - peer_req->submit_jif));
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seq_print_peer_request_flags(m, peer_req);
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if (peer_req->flags & EE_SUBMITTED)
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break;
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else
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reported_preparing = true;
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}
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}
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static void seq_print_device_peer_requests(struct seq_file *m,
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struct drbd_device *device, unsigned long now)
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{
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seq_puts(m, "minor\tvnr\tsector\tsize\trw\tage\tflags\n");
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spin_lock_irq(&device->resource->req_lock);
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seq_print_peer_request(m, device, &device->active_ee, now);
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seq_print_peer_request(m, device, &device->read_ee, now);
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seq_print_peer_request(m, device, &device->sync_ee, now);
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spin_unlock_irq(&device->resource->req_lock);
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if (test_bit(FLUSH_PENDING, &device->flags)) {
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seq_printf(m, "%u\t%u\t-\t-\tF\t%u\tflush\n",
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device->minor, device->vnr,
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jiffies_to_msecs(now - device->flush_jif));
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}
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}
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static void seq_print_resource_pending_peer_requests(struct seq_file *m,
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struct drbd_resource *resource, unsigned long now)
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{
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struct drbd_device *device;
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unsigned int i;
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rcu_read_lock();
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idr_for_each_entry(&resource->devices, device, i) {
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seq_print_device_peer_requests(m, device, now);
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}
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rcu_read_unlock();
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}
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static void seq_print_resource_transfer_log_summary(struct seq_file *m,
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struct drbd_resource *resource,
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struct drbd_connection *connection,
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unsigned long now)
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{
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struct drbd_request *req;
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unsigned int count = 0;
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unsigned int show_state = 0;
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seq_puts(m, "n\tdevice\tvnr\t" RQ_HDR);
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spin_lock_irq(&resource->req_lock);
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list_for_each_entry(req, &connection->transfer_log, tl_requests) {
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unsigned int tmp = 0;
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unsigned int s;
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++count;
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/* don't disable irq "forever" */
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if (!(count & 0x1ff)) {
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struct drbd_request *req_next;
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kref_get(&req->kref);
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spin_unlock_irq(&resource->req_lock);
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cond_resched();
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spin_lock_irq(&resource->req_lock);
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req_next = list_next_entry(req, tl_requests);
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if (kref_put(&req->kref, drbd_req_destroy))
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req = req_next;
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if (&req->tl_requests == &connection->transfer_log)
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break;
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}
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s = req->rq_state;
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/* This is meant to summarize timing issues, to be able to tell
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* local disk problems from network problems.
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* Skip requests, if we have shown an even older request with
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* similar aspects already. */
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if (req->master_bio == NULL)
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tmp |= 1;
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if ((s & RQ_LOCAL_MASK) && (s & RQ_LOCAL_PENDING))
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tmp |= 2;
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if (s & RQ_NET_MASK) {
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if (!(s & RQ_NET_SENT))
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tmp |= 4;
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if (s & RQ_NET_PENDING)
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tmp |= 8;
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if (!(s & RQ_NET_DONE))
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tmp |= 16;
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}
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if ((tmp & show_state) == tmp)
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continue;
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show_state |= tmp;
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seq_printf(m, "%u\t", count);
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seq_print_minor_vnr_req(m, req, now);
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if (show_state == 0x1f)
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break;
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}
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spin_unlock_irq(&resource->req_lock);
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}
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/* TODO: transfer_log and friends should be moved to resource */
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static int in_flight_summary_show(struct seq_file *m, void *pos)
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{
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struct drbd_resource *resource = m->private;
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struct drbd_connection *connection;
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unsigned long jif = jiffies;
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connection = first_connection(resource);
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/* This does not happen, actually.
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* But be robust and prepare for future code changes. */
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if (!connection || !kref_get_unless_zero(&connection->kref))
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return -ESTALE;
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/* BUMP me if you change the file format/content/presentation */
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seq_printf(m, "v: %u\n\n", 0);
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seq_puts(m, "oldest bitmap IO\n");
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seq_print_resource_pending_bitmap_io(m, resource, jif);
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seq_putc(m, '\n');
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seq_puts(m, "meta data IO\n");
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seq_print_resource_pending_meta_io(m, resource, jif);
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seq_putc(m, '\n');
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seq_puts(m, "socket buffer stats\n");
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/* for each connection ... once we have more than one */
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rcu_read_lock();
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if (connection->data.socket) {
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/* open coded SIOCINQ, the "relevant" part */
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struct tcp_sock *tp = tcp_sk(connection->data.socket->sk);
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int answ = tp->rcv_nxt - tp->copied_seq;
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seq_printf(m, "unread receive buffer: %u Byte\n", answ);
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/* open coded SIOCOUTQ, the "relevant" part */
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answ = tp->write_seq - tp->snd_una;
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seq_printf(m, "unacked send buffer: %u Byte\n", answ);
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}
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rcu_read_unlock();
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seq_putc(m, '\n');
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seq_puts(m, "oldest peer requests\n");
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seq_print_resource_pending_peer_requests(m, resource, jif);
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seq_putc(m, '\n');
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seq_puts(m, "application requests waiting for activity log\n");
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seq_print_waiting_for_AL(m, resource, jif);
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seq_putc(m, '\n');
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seq_puts(m, "oldest application requests\n");
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seq_print_resource_transfer_log_summary(m, resource, connection, jif);
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seq_putc(m, '\n');
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jif = jiffies - jif;
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if (jif)
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seq_printf(m, "generated in %d ms\n", jiffies_to_msecs(jif));
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kref_put(&connection->kref, drbd_destroy_connection);
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return 0;
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}
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/* simple_positive(file->f_dentry) respectively debugfs_positive(),
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* but neither is "reachable" from here.
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* So we have our own inline version of it above. :-( */
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static inline int debugfs_positive(struct dentry *dentry)
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{
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return dentry->d_inode && !d_unhashed(dentry);
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}
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/* make sure at *open* time that the respective object won't go away. */
|
|
static int drbd_single_open(struct file *file, int (*show)(struct seq_file *, void *),
|
|
void *data, struct kref *kref,
|
|
void (*release)(struct kref *))
|
|
{
|
|
struct dentry *parent;
|
|
int ret = -ESTALE;
|
|
|
|
/* Are we still linked,
|
|
* or has debugfs_remove() already been called? */
|
|
parent = file->f_dentry->d_parent;
|
|
/* not sure if this can happen: */
|
|
if (!parent || !parent->d_inode)
|
|
goto out;
|
|
/* serialize with d_delete() */
|
|
mutex_lock(&parent->d_inode->i_mutex);
|
|
/* Make sure the object is still alive */
|
|
if (debugfs_positive(file->f_dentry)
|
|
&& kref_get_unless_zero(kref))
|
|
ret = 0;
|
|
mutex_unlock(&parent->d_inode->i_mutex);
|
|
if (!ret) {
|
|
ret = single_open(file, show, data);
|
|
if (ret)
|
|
kref_put(kref, release);
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int in_flight_summary_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct drbd_resource *resource = inode->i_private;
|
|
return drbd_single_open(file, in_flight_summary_show, resource,
|
|
&resource->kref, drbd_destroy_resource);
|
|
}
|
|
|
|
static int in_flight_summary_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct drbd_resource *resource = inode->i_private;
|
|
kref_put(&resource->kref, drbd_destroy_resource);
|
|
return single_release(inode, file);
|
|
}
|
|
|
|
static const struct file_operations in_flight_summary_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = in_flight_summary_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = in_flight_summary_release,
|
|
};
|
|
|
|
void drbd_debugfs_resource_add(struct drbd_resource *resource)
|
|
{
|
|
struct dentry *dentry;
|
|
if (!drbd_debugfs_resources)
|
|
return;
|
|
|
|
dentry = debugfs_create_dir(resource->name, drbd_debugfs_resources);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
resource->debugfs_res = dentry;
|
|
|
|
dentry = debugfs_create_dir("volumes", resource->debugfs_res);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
resource->debugfs_res_volumes = dentry;
|
|
|
|
dentry = debugfs_create_dir("connections", resource->debugfs_res);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
resource->debugfs_res_connections = dentry;
|
|
|
|
dentry = debugfs_create_file("in_flight_summary", S_IRUSR|S_IRGRP,
|
|
resource->debugfs_res, resource,
|
|
&in_flight_summary_fops);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
resource->debugfs_res_in_flight_summary = dentry;
|
|
return;
|
|
|
|
fail:
|
|
drbd_debugfs_resource_cleanup(resource);
|
|
drbd_err(resource, "failed to create debugfs dentry\n");
|
|
}
|
|
|
|
static void drbd_debugfs_remove(struct dentry **dp)
|
|
{
|
|
debugfs_remove(*dp);
|
|
*dp = NULL;
|
|
}
|
|
|
|
void drbd_debugfs_resource_cleanup(struct drbd_resource *resource)
|
|
{
|
|
/* it is ok to call debugfs_remove(NULL) */
|
|
drbd_debugfs_remove(&resource->debugfs_res_in_flight_summary);
|
|
drbd_debugfs_remove(&resource->debugfs_res_connections);
|
|
drbd_debugfs_remove(&resource->debugfs_res_volumes);
|
|
drbd_debugfs_remove(&resource->debugfs_res);
|
|
}
|
|
|
|
static void seq_print_one_timing_detail(struct seq_file *m,
|
|
const struct drbd_thread_timing_details *tdp,
|
|
unsigned long now)
|
|
{
|
|
struct drbd_thread_timing_details td;
|
|
/* No locking...
|
|
* use temporary assignment to get at consistent data. */
|
|
do {
|
|
td = *tdp;
|
|
} while (td.cb_nr != tdp->cb_nr);
|
|
if (!td.cb_addr)
|
|
return;
|
|
seq_printf(m, "%u\t%d\t%s:%u\t%ps\n",
|
|
td.cb_nr,
|
|
jiffies_to_msecs(now - td.start_jif),
|
|
td.caller_fn, td.line,
|
|
td.cb_addr);
|
|
}
|
|
|
|
static void seq_print_timing_details(struct seq_file *m,
|
|
const char *title,
|
|
unsigned int cb_nr, struct drbd_thread_timing_details *tdp, unsigned long now)
|
|
{
|
|
unsigned int start_idx;
|
|
unsigned int i;
|
|
|
|
seq_printf(m, "%s\n", title);
|
|
/* If not much is going on, this will result in natural ordering.
|
|
* If it is very busy, we will possibly skip events, or even see wrap
|
|
* arounds, which could only be avoided with locking.
|
|
*/
|
|
start_idx = cb_nr % DRBD_THREAD_DETAILS_HIST;
|
|
for (i = start_idx; i < DRBD_THREAD_DETAILS_HIST; i++)
|
|
seq_print_one_timing_detail(m, tdp+i, now);
|
|
for (i = 0; i < start_idx; i++)
|
|
seq_print_one_timing_detail(m, tdp+i, now);
|
|
}
|
|
|
|
static int callback_history_show(struct seq_file *m, void *ignored)
|
|
{
|
|
struct drbd_connection *connection = m->private;
|
|
unsigned long jif = jiffies;
|
|
|
|
/* BUMP me if you change the file format/content/presentation */
|
|
seq_printf(m, "v: %u\n\n", 0);
|
|
|
|
seq_puts(m, "n\tage\tcallsite\tfn\n");
|
|
seq_print_timing_details(m, "worker", connection->w_cb_nr, connection->w_timing_details, jif);
|
|
seq_print_timing_details(m, "receiver", connection->r_cb_nr, connection->r_timing_details, jif);
|
|
return 0;
|
|
}
|
|
|
|
static int callback_history_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct drbd_connection *connection = inode->i_private;
|
|
return drbd_single_open(file, callback_history_show, connection,
|
|
&connection->kref, drbd_destroy_connection);
|
|
}
|
|
|
|
static int callback_history_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct drbd_connection *connection = inode->i_private;
|
|
kref_put(&connection->kref, drbd_destroy_connection);
|
|
return single_release(inode, file);
|
|
}
|
|
|
|
static const struct file_operations connection_callback_history_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = callback_history_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = callback_history_release,
|
|
};
|
|
|
|
static int connection_oldest_requests_show(struct seq_file *m, void *ignored)
|
|
{
|
|
struct drbd_connection *connection = m->private;
|
|
unsigned long now = jiffies;
|
|
struct drbd_request *r1, *r2;
|
|
|
|
/* BUMP me if you change the file format/content/presentation */
|
|
seq_printf(m, "v: %u\n\n", 0);
|
|
|
|
spin_lock_irq(&connection->resource->req_lock);
|
|
r1 = connection->req_next;
|
|
if (r1)
|
|
seq_print_minor_vnr_req(m, r1, now);
|
|
r2 = connection->req_ack_pending;
|
|
if (r2 && r2 != r1) {
|
|
r1 = r2;
|
|
seq_print_minor_vnr_req(m, r1, now);
|
|
}
|
|
r2 = connection->req_not_net_done;
|
|
if (r2 && r2 != r1)
|
|
seq_print_minor_vnr_req(m, r2, now);
|
|
spin_unlock_irq(&connection->resource->req_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int connection_oldest_requests_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct drbd_connection *connection = inode->i_private;
|
|
return drbd_single_open(file, connection_oldest_requests_show, connection,
|
|
&connection->kref, drbd_destroy_connection);
|
|
}
|
|
|
|
static int connection_oldest_requests_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct drbd_connection *connection = inode->i_private;
|
|
kref_put(&connection->kref, drbd_destroy_connection);
|
|
return single_release(inode, file);
|
|
}
|
|
|
|
static const struct file_operations connection_oldest_requests_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = connection_oldest_requests_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = connection_oldest_requests_release,
|
|
};
|
|
|
|
void drbd_debugfs_connection_add(struct drbd_connection *connection)
|
|
{
|
|
struct dentry *conns_dir = connection->resource->debugfs_res_connections;
|
|
struct dentry *dentry;
|
|
if (!conns_dir)
|
|
return;
|
|
|
|
/* Once we enable mutliple peers,
|
|
* these connections will have descriptive names.
|
|
* For now, it is just the one connection to the (only) "peer". */
|
|
dentry = debugfs_create_dir("peer", conns_dir);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
connection->debugfs_conn = dentry;
|
|
|
|
dentry = debugfs_create_file("callback_history", S_IRUSR|S_IRGRP,
|
|
connection->debugfs_conn, connection,
|
|
&connection_callback_history_fops);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
connection->debugfs_conn_callback_history = dentry;
|
|
|
|
dentry = debugfs_create_file("oldest_requests", S_IRUSR|S_IRGRP,
|
|
connection->debugfs_conn, connection,
|
|
&connection_oldest_requests_fops);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
connection->debugfs_conn_oldest_requests = dentry;
|
|
return;
|
|
|
|
fail:
|
|
drbd_debugfs_connection_cleanup(connection);
|
|
drbd_err(connection, "failed to create debugfs dentry\n");
|
|
}
|
|
|
|
void drbd_debugfs_connection_cleanup(struct drbd_connection *connection)
|
|
{
|
|
drbd_debugfs_remove(&connection->debugfs_conn_callback_history);
|
|
drbd_debugfs_remove(&connection->debugfs_conn_oldest_requests);
|
|
drbd_debugfs_remove(&connection->debugfs_conn);
|
|
}
|
|
|
|
static void resync_dump_detail(struct seq_file *m, struct lc_element *e)
|
|
{
|
|
struct bm_extent *bme = lc_entry(e, struct bm_extent, lce);
|
|
|
|
seq_printf(m, "%5d %s %s %s\n", bme->rs_left,
|
|
test_bit(BME_NO_WRITES, &bme->flags) ? "NO_WRITES" : "---------",
|
|
test_bit(BME_LOCKED, &bme->flags) ? "LOCKED" : "------",
|
|
test_bit(BME_PRIORITY, &bme->flags) ? "PRIORITY" : "--------"
|
|
);
|
|
}
|
|
|
|
static int device_resync_extents_show(struct seq_file *m, void *ignored)
|
|
{
|
|
struct drbd_device *device = m->private;
|
|
|
|
/* BUMP me if you change the file format/content/presentation */
|
|
seq_printf(m, "v: %u\n\n", 0);
|
|
|
|
if (get_ldev_if_state(device, D_FAILED)) {
|
|
lc_seq_printf_stats(m, device->resync);
|
|
lc_seq_dump_details(m, device->resync, "rs_left flags", resync_dump_detail);
|
|
put_ldev(device);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int device_act_log_extents_show(struct seq_file *m, void *ignored)
|
|
{
|
|
struct drbd_device *device = m->private;
|
|
|
|
/* BUMP me if you change the file format/content/presentation */
|
|
seq_printf(m, "v: %u\n\n", 0);
|
|
|
|
if (get_ldev_if_state(device, D_FAILED)) {
|
|
lc_seq_printf_stats(m, device->act_log);
|
|
lc_seq_dump_details(m, device->act_log, "", NULL);
|
|
put_ldev(device);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int device_oldest_requests_show(struct seq_file *m, void *ignored)
|
|
{
|
|
struct drbd_device *device = m->private;
|
|
struct drbd_resource *resource = device->resource;
|
|
unsigned long now = jiffies;
|
|
struct drbd_request *r1, *r2;
|
|
int i;
|
|
|
|
/* BUMP me if you change the file format/content/presentation */
|
|
seq_printf(m, "v: %u\n\n", 0);
|
|
|
|
seq_puts(m, RQ_HDR);
|
|
spin_lock_irq(&resource->req_lock);
|
|
/* WRITE, then READ */
|
|
for (i = 1; i >= 0; --i) {
|
|
r1 = list_first_entry_or_null(&device->pending_master_completion[i],
|
|
struct drbd_request, req_pending_master_completion);
|
|
r2 = list_first_entry_or_null(&device->pending_completion[i],
|
|
struct drbd_request, req_pending_local);
|
|
if (r1)
|
|
seq_print_one_request(m, r1, now);
|
|
if (r2 && r2 != r1)
|
|
seq_print_one_request(m, r2, now);
|
|
}
|
|
spin_unlock_irq(&resource->req_lock);
|
|
return 0;
|
|
}
|
|
|
|
static int device_data_gen_id_show(struct seq_file *m, void *ignored)
|
|
{
|
|
struct drbd_device *device = m->private;
|
|
struct drbd_md *md;
|
|
enum drbd_uuid_index idx;
|
|
|
|
if (!get_ldev_if_state(device, D_FAILED))
|
|
return -ENODEV;
|
|
|
|
md = &device->ldev->md;
|
|
spin_lock_irq(&md->uuid_lock);
|
|
for (idx = UI_CURRENT; idx <= UI_HISTORY_END; idx++) {
|
|
seq_printf(m, "0x%016llX\n", md->uuid[idx]);
|
|
}
|
|
spin_unlock_irq(&md->uuid_lock);
|
|
put_ldev(device);
|
|
return 0;
|
|
}
|
|
|
|
#define drbd_debugfs_device_attr(name) \
|
|
static int device_ ## name ## _open(struct inode *inode, struct file *file) \
|
|
{ \
|
|
struct drbd_device *device = inode->i_private; \
|
|
return drbd_single_open(file, device_ ## name ## _show, device, \
|
|
&device->kref, drbd_destroy_device); \
|
|
} \
|
|
static int device_ ## name ## _release(struct inode *inode, struct file *file) \
|
|
{ \
|
|
struct drbd_device *device = inode->i_private; \
|
|
kref_put(&device->kref, drbd_destroy_device); \
|
|
return single_release(inode, file); \
|
|
} \
|
|
static const struct file_operations device_ ## name ## _fops = { \
|
|
.owner = THIS_MODULE, \
|
|
.open = device_ ## name ## _open, \
|
|
.read = seq_read, \
|
|
.llseek = seq_lseek, \
|
|
.release = device_ ## name ## _release, \
|
|
};
|
|
|
|
drbd_debugfs_device_attr(oldest_requests)
|
|
drbd_debugfs_device_attr(act_log_extents)
|
|
drbd_debugfs_device_attr(resync_extents)
|
|
drbd_debugfs_device_attr(data_gen_id)
|
|
|
|
void drbd_debugfs_device_add(struct drbd_device *device)
|
|
{
|
|
struct dentry *vols_dir = device->resource->debugfs_res_volumes;
|
|
char minor_buf[8]; /* MINORMASK, MINORBITS == 20; */
|
|
char vnr_buf[8]; /* volume number vnr is even 16 bit only; */
|
|
char *slink_name = NULL;
|
|
|
|
struct dentry *dentry;
|
|
if (!vols_dir || !drbd_debugfs_minors)
|
|
return;
|
|
|
|
snprintf(vnr_buf, sizeof(vnr_buf), "%u", device->vnr);
|
|
dentry = debugfs_create_dir(vnr_buf, vols_dir);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
device->debugfs_vol = dentry;
|
|
|
|
snprintf(minor_buf, sizeof(minor_buf), "%u", device->minor);
|
|
slink_name = kasprintf(GFP_KERNEL, "../resources/%s/volumes/%u",
|
|
device->resource->name, device->vnr);
|
|
if (!slink_name)
|
|
goto fail;
|
|
dentry = debugfs_create_symlink(minor_buf, drbd_debugfs_minors, slink_name);
|
|
kfree(slink_name);
|
|
slink_name = NULL;
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
device->debugfs_minor = dentry;
|
|
|
|
#define DCF(name) do { \
|
|
dentry = debugfs_create_file(#name, S_IRUSR|S_IRGRP, \
|
|
device->debugfs_vol, device, \
|
|
&device_ ## name ## _fops); \
|
|
if (IS_ERR_OR_NULL(dentry)) \
|
|
goto fail; \
|
|
device->debugfs_vol_ ## name = dentry; \
|
|
} while (0)
|
|
|
|
DCF(oldest_requests);
|
|
DCF(act_log_extents);
|
|
DCF(resync_extents);
|
|
DCF(data_gen_id);
|
|
#undef DCF
|
|
return;
|
|
|
|
fail:
|
|
drbd_debugfs_device_cleanup(device);
|
|
drbd_err(device, "failed to create debugfs entries\n");
|
|
}
|
|
|
|
void drbd_debugfs_device_cleanup(struct drbd_device *device)
|
|
{
|
|
drbd_debugfs_remove(&device->debugfs_minor);
|
|
drbd_debugfs_remove(&device->debugfs_vol_oldest_requests);
|
|
drbd_debugfs_remove(&device->debugfs_vol_act_log_extents);
|
|
drbd_debugfs_remove(&device->debugfs_vol_resync_extents);
|
|
drbd_debugfs_remove(&device->debugfs_vol_data_gen_id);
|
|
drbd_debugfs_remove(&device->debugfs_vol);
|
|
}
|
|
|
|
void drbd_debugfs_peer_device_add(struct drbd_peer_device *peer_device)
|
|
{
|
|
struct dentry *conn_dir = peer_device->connection->debugfs_conn;
|
|
struct dentry *dentry;
|
|
char vnr_buf[8];
|
|
|
|
if (!conn_dir)
|
|
return;
|
|
|
|
snprintf(vnr_buf, sizeof(vnr_buf), "%u", peer_device->device->vnr);
|
|
dentry = debugfs_create_dir(vnr_buf, conn_dir);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
peer_device->debugfs_peer_dev = dentry;
|
|
return;
|
|
|
|
fail:
|
|
drbd_debugfs_peer_device_cleanup(peer_device);
|
|
drbd_err(peer_device, "failed to create debugfs entries\n");
|
|
}
|
|
|
|
void drbd_debugfs_peer_device_cleanup(struct drbd_peer_device *peer_device)
|
|
{
|
|
drbd_debugfs_remove(&peer_device->debugfs_peer_dev);
|
|
}
|
|
|
|
static int drbd_version_show(struct seq_file *m, void *ignored)
|
|
{
|
|
seq_printf(m, "# %s\n", drbd_buildtag());
|
|
seq_printf(m, "VERSION=%s\n", REL_VERSION);
|
|
seq_printf(m, "API_VERSION=%u\n", API_VERSION);
|
|
seq_printf(m, "PRO_VERSION_MIN=%u\n", PRO_VERSION_MIN);
|
|
seq_printf(m, "PRO_VERSION_MAX=%u\n", PRO_VERSION_MAX);
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_version_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, drbd_version_show, NULL);
|
|
}
|
|
|
|
static struct file_operations drbd_version_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = drbd_version_open,
|
|
.llseek = seq_lseek,
|
|
.read = seq_read,
|
|
.release = single_release,
|
|
};
|
|
|
|
/* not __exit, may be indirectly called
|
|
* from the module-load-failure path as well. */
|
|
void drbd_debugfs_cleanup(void)
|
|
{
|
|
drbd_debugfs_remove(&drbd_debugfs_resources);
|
|
drbd_debugfs_remove(&drbd_debugfs_minors);
|
|
drbd_debugfs_remove(&drbd_debugfs_version);
|
|
drbd_debugfs_remove(&drbd_debugfs_root);
|
|
}
|
|
|
|
int __init drbd_debugfs_init(void)
|
|
{
|
|
struct dentry *dentry;
|
|
|
|
dentry = debugfs_create_dir("drbd", NULL);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
drbd_debugfs_root = dentry;
|
|
|
|
dentry = debugfs_create_file("version", 0444, drbd_debugfs_root, NULL, &drbd_version_fops);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
drbd_debugfs_version = dentry;
|
|
|
|
dentry = debugfs_create_dir("resources", drbd_debugfs_root);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
drbd_debugfs_resources = dentry;
|
|
|
|
dentry = debugfs_create_dir("minors", drbd_debugfs_root);
|
|
if (IS_ERR_OR_NULL(dentry))
|
|
goto fail;
|
|
drbd_debugfs_minors = dentry;
|
|
return 0;
|
|
|
|
fail:
|
|
drbd_debugfs_cleanup();
|
|
if (dentry)
|
|
return PTR_ERR(dentry);
|
|
else
|
|
return -EINVAL;
|
|
}
|