[PATCH 14/16] DRBD: tracepoint_probes
From: Philipp Reisner
Date: Thu Apr 30 2009 - 07:30:37 EST
There are a number of static tracepoints, mainly for debugging purposis.
Signed-off-by: Philipp Reisner <philipp.reisner@xxxxxxxxxx>
Signed-off-by: Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>
---
diff --git a/drivers/block/drbd/drbd_tracing.h b/drivers/block/drbd/drbd_tracing.h
new file mode 100644
index 0000000..c4531a1
--- /dev/null
+++ b/drivers/block/drbd/drbd_tracing.h
@@ -0,0 +1,87 @@
+/*
+ drbd_tracing.h
+
+ This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
+
+ Copyright (C) 2003-2008, LINBIT Information Technologies GmbH.
+ Copyright (C) 2003-2008, Philipp Reisner <philipp.reisner@xxxxxxxxxx>.
+ Copyright (C) 2003-2008, Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>.
+
+ drbd 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.
+
+ drbd 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 drbd; see the file COPYING. If not, write to
+ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ */
+
+#ifndef DRBD_TRACING_H
+#define DRBD_TRACING_H
+
+#include <linux/tracepoint.h>
+#include "drbd_int.h"
+#include "drbd_req.h"
+
+enum {
+ TRACE_LVL_ALWAYS = 0,
+ TRACE_LVL_SUMMARY,
+ TRACE_LVL_METRICS,
+ TRACE_LVL_ALL,
+ TRACE_LVL_MAX
+};
+
+DECLARE_TRACE(drbd_unplug,
+ TP_PROTO(struct drbd_conf *mdev, char* msg),
+ TP_ARGS(mdev, msg));
+
+DECLARE_TRACE(drbd_uuid,
+ TP_PROTO(struct drbd_conf *mdev, enum drbd_uuid_index index),
+ TP_ARGS(mdev, index));
+
+DECLARE_TRACE(drbd_ee,
+ TP_PROTO(struct drbd_conf *mdev, struct drbd_epoch_entry *e, char* msg),
+ TP_ARGS(mdev, e, msg));
+
+DECLARE_TRACE(drbd_md_io,
+ TP_PROTO(struct drbd_conf *mdev, int rw, struct drbd_backing_dev *bdev),
+ TP_ARGS(mdev, rw, bdev));
+
+DECLARE_TRACE(drbd_epoch,
+ TP_PROTO(struct drbd_conf *mdev, struct drbd_epoch *epoch, enum epoch_event ev),
+ TP_ARGS(mdev, epoch, ev));
+
+DECLARE_TRACE(drbd_netlink,
+ TP_PROTO(void *data, int is_req),
+ TP_ARGS(data, is_req));
+
+DECLARE_TRACE(drbd_actlog,
+ TP_PROTO(struct drbd_conf *mdev, sector_t sector, char* msg),
+ TP_ARGS(mdev, sector, msg));
+
+DECLARE_TRACE(drbd_bio,
+ TP_PROTO(struct drbd_conf *mdev, const char *pfx, struct bio *bio, int complete,
+ struct drbd_request *r),
+ TP_ARGS(mdev, pfx, bio, complete, r));
+
+DECLARE_TRACE(drbd_req,
+ TP_PROTO(struct drbd_request *req, enum drbd_req_event what, char *msg),
+ TP_ARGS(req, what, msg));
+
+DECLARE_TRACE(drbd_packet,
+ TP_PROTO(struct drbd_conf *mdev, struct socket *sock,
+ int recv, union p_polymorph *p, char *file, int line),
+ TP_ARGS(mdev, sock, recv, p, file, line));
+
+DECLARE_TRACE(_drbd_resync,
+ TP_PROTO(struct drbd_conf *mdev, int level, const char *fmt, va_list args),
+ TP_ARGS(mdev, level, fmt, args));
+
+#endif
diff --git a/drivers/block/drbd/drbd_tracing.c b/drivers/block/drbd/drbd_tracing.c
new file mode 100644
index 0000000..2eff178
--- /dev/null
+++ b/drivers/block/drbd/drbd_tracing.c
@@ -0,0 +1,762 @@
+/*
+ drbd_tracing.c
+
+ This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
+
+ Copyright (C) 2003-2008, LINBIT Information Technologies GmbH.
+ Copyright (C) 2003-2008, Philipp Reisner <philipp.reisner@xxxxxxxxxx>.
+ Copyright (C) 2003-2008, Lars Ellenberg <lars.ellenberg@xxxxxxxxxx>.
+
+ drbd 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.
+
+ drbd 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 drbd; see the file COPYING. If not, write to
+ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+ */
+
+#include <linux/module.h>
+#include <linux/drbd.h>
+#include <linux/ctype.h>
+#include <linux/marker.h>
+#include "drbd_int.h"
+#include "drbd_tracing.h"
+#include <linux/drbd_tag_magic.h>
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Philipp Reisner, Lars Ellenberg");
+MODULE_DESCRIPTION("DRBD tracepoint probes");
+MODULE_PARM_DESC(trace_mask, "Bitmap of events to trace see drbd_tracing.c");
+MODULE_PARM_DESC(trace_level, "Current tracing level (changeable in /sys)");
+MODULE_PARM_DESC(trace_devs, "Bitmap of devices to trace (changeable in /sys)");
+
+unsigned int trace_mask = 0; /* Bitmap of events to trace */
+int trace_level; /* Current trace level */
+int trace_devs; /* Bitmap of devices to trace */
+
+module_param(trace_mask, uint, 0444);
+module_param(trace_level, int, 0644);
+module_param(trace_devs, int, 0644);
+
+enum {
+ TRACE_PACKET = 0x0001,
+ TRACE_RQ = 0x0002,
+ TRACE_UUID = 0x0004,
+ TRACE_RESYNC = 0x0008,
+ TRACE_EE = 0x0010,
+ TRACE_UNPLUG = 0x0020,
+ TRACE_NL = 0x0040,
+ TRACE_AL_EXT = 0x0080,
+ TRACE_INT_RQ = 0x0100,
+ TRACE_MD_IO = 0x0200,
+ TRACE_EPOCH = 0x0400,
+};
+
+/* Buffer printing support
+ * dbg_print_flags: used for Flags arg to drbd_print_buffer
+ * - DBGPRINT_BUFFADDR; if set, each line starts with the
+ * virtual address of the line being output. If clear,
+ * each line starts with the offset from the beginning
+ * of the buffer. */
+enum dbg_print_flags {
+ DBGPRINT_BUFFADDR = 0x0001,
+};
+
+/* Macro stuff */
+STATIC char *nl_packet_name(int packet_type)
+{
+/* Generate packet type strings */
+#define NL_PACKET(name, number, fields) \
+ [P_ ## name] = # name,
+#define NL_INTEGER Argh!
+#define NL_BIT Argh!
+#define NL_INT64 Argh!
+#define NL_STRING Argh!
+
+ static char *nl_tag_name[P_nl_after_last_packet] = {
+#include "linux/drbd_nl.h"
+ };
+
+ return (packet_type < sizeof(nl_tag_name)/sizeof(nl_tag_name[0])) ?
+ nl_tag_name[packet_type] : "*Unknown*";
+}
+/* /Macro stuff */
+
+static inline int is_mdev_trace(struct drbd_conf *mdev, unsigned int level)
+{
+ return trace_level >= level && ((1 << mdev_to_minor(mdev)) & trace_devs);
+}
+
+static void probe_drbd_unplug(struct drbd_conf *mdev, char *msg)
+{
+ if (!is_mdev_trace(mdev, TRACE_LVL_ALWAYS))
+ return;
+
+ dev_info(DEV, "%s, ap_bio_count=%d\n", msg, atomic_read(&mdev->ap_bio_cnt));
+}
+
+static void probe_drbd_uuid(struct drbd_conf *mdev, enum drbd_uuid_index index)
+{
+ static char *uuid_str[UI_EXTENDED_SIZE] = {
+ [UI_CURRENT] = "CURRENT",
+ [UI_BITMAP] = "BITMAP",
+ [UI_HISTORY_START] = "HISTORY_START",
+ [UI_HISTORY_END] = "HISTORY_END",
+ [UI_SIZE] = "SIZE",
+ [UI_FLAGS] = "FLAGS",
+ };
+
+ if (!is_mdev_trace(mdev, TRACE_LVL_ALWAYS))
+ return;
+
+ if (index >= UI_EXTENDED_SIZE) {
+ dev_warn(DEV, " uuid_index >= EXTENDED_SIZE\n");
+ return;
+ }
+
+ dev_info(DEV, " uuid[%s] now %016llX\n",
+ uuid_str[index],
+ (unsigned long long)mdev->bc->md.uuid[index]);
+}
+
+static void probe_drbd_md_io(struct drbd_conf *mdev, int rw,
+ struct drbd_backing_dev *bdev)
+{
+ if (!is_mdev_trace(mdev, TRACE_LVL_ALWAYS))
+ return;
+
+ dev_info(DEV, " %s metadata superblock now\n",
+ rw == READ ? "Reading" : "Writing");
+}
+
+static void probe_drbd_ee(struct drbd_conf *mdev, struct drbd_epoch_entry *e, char* msg)
+{
+ if (!is_mdev_trace(mdev, TRACE_LVL_ALWAYS))
+ return;
+
+ dev_info(DEV, "EE %s sec=%llus size=%u e=%p\n",
+ msg, (unsigned long long)e->sector, e->size, e);
+}
+
+static void probe_drbd_epoch(struct drbd_conf *mdev, struct drbd_epoch *epoch,
+ enum epoch_event ev)
+{
+ static char *epoch_event_str[] = {
+ [EV_PUT] = "put",
+ [EV_GOT_BARRIER_NR] = "got_barrier_nr",
+ [EV_BARRIER_DONE] = "barrier_done",
+ [EV_BECAME_LAST] = "became_last",
+ [EV_TRACE_FLUSH] = "issuing_flush",
+ [EV_TRACE_ADD_BARRIER] = "added_barrier",
+ [EV_TRACE_SETTING_BI] = "just set barrier_in_next_epoch",
+ };
+
+ if (!is_mdev_trace(mdev, TRACE_LVL_ALWAYS))
+ return;
+
+ ev &= ~EV_CLEANUP;
+
+ switch (ev) {
+ case EV_TRACE_ALLOC:
+ dev_info(DEV, "Allocat epoch %p/xxxx { } nr_epochs=%d\n", epoch, mdev->epochs);
+ break;
+ case EV_TRACE_FREE:
+ dev_info(DEV, "Freeing epoch %p/%d { size=%d } nr_epochs=%d\n",
+ epoch, epoch->barrier_nr, atomic_read(&epoch->epoch_size),
+ mdev->epochs);
+ break;
+ default:
+ dev_info(DEV, "Update epoch %p/%d { size=%d active=%d %c%c n%c%c } ev=%s\n",
+ epoch, epoch->barrier_nr, atomic_read(&epoch->epoch_size),
+ atomic_read(&epoch->active),
+ test_bit(DE_HAVE_BARRIER_NUMBER, &epoch->flags) ? 'n' : '-',
+ test_bit(DE_CONTAINS_A_BARRIER, &epoch->flags) ? 'b' : '-',
+ test_bit(DE_BARRIER_IN_NEXT_EPOCH_ISSUED, &epoch->flags) ? 'i' : '-',
+ test_bit(DE_BARRIER_IN_NEXT_EPOCH_DONE, &epoch->flags) ? 'd' : '-',
+ epoch_event_str[ev]);
+ }
+}
+
+static void probe_drbd_netlink(void *data, int is_req)
+{
+ struct cn_msg *msg = data;
+
+ if (is_req) {
+ struct drbd_nl_cfg_req *nlp = (struct drbd_nl_cfg_req *)msg->data;
+
+ printk(KERN_INFO "drbd%d: "
+ "Netlink: << %s (%d) - seq: %x, ack: %x, len: %x\n",
+ nlp->drbd_minor,
+ nl_packet_name(nlp->packet_type),
+ nlp->packet_type,
+ msg->seq, msg->ack, msg->len);
+ } else {
+ struct drbd_nl_cfg_reply *nlp = (struct drbd_nl_cfg_reply *)msg->data;
+
+ printk(KERN_INFO "drbd%d: "
+ "Netlink: >> %s (%d) - seq: %x, ack: %x, len: %x\n",
+ nlp->minor,
+ nlp->packet_type == P_nl_after_last_packet ?
+ "Empty-Reply" : nl_packet_name(nlp->packet_type),
+ nlp->packet_type,
+ msg->seq, msg->ack, msg->len);
+ }
+}
+
+static void probe_drbd_actlog(struct drbd_conf *mdev, sector_t sector, char* msg)
+{
+ unsigned int enr = (sector >> (AL_EXTENT_SIZE_B-9));
+
+ if (!is_mdev_trace(mdev, TRACE_LVL_ALWAYS))
+ return;
+
+ dev_info(DEV, "%s (sec=%llus, al_enr=%u, rs_enr=%d)\n",
+ msg, (unsigned long long) sector, enr,
+ (int)BM_SECT_TO_EXT(sector));
+}
+
+/*
+ *
+ * drbd_print_buffer
+ *
+ * This routine dumps binary data to the debugging output. Can be
+ * called at interrupt level.
+ *
+ * Arguments:
+ *
+ * prefix - String is output at the beginning of each line output
+ * flags - Control operation of the routine. Currently defined
+ * Flags are:
+ * DBGPRINT_BUFFADDR; if set, each line starts with the
+ * virtual address of the line being outupt. If clear,
+ * each line starts with the offset from the beginning
+ * of the buffer.
+ * size - Indicates the size of each entry in the buffer. Supported
+ * values are sizeof(char), sizeof(short) and sizeof(int)
+ * buffer - Start address of buffer
+ * buffer_va - Virtual address of start of buffer (normally the same
+ * as Buffer, but having it separate allows it to hold
+ * file address for example)
+ * length - length of buffer
+ *
+ */
+static void drbd_print_buffer(const char *prefix, unsigned int flags, int size,
+ const void *buffer, const void *buffer_va,
+ unsigned int length)
+
+#define LINE_SIZE 16
+#define LINE_ENTRIES (int)(LINE_SIZE/size)
+{
+ const unsigned char *pstart;
+ const unsigned char *pstart_va;
+ const unsigned char *pend;
+ char bytes_str[LINE_SIZE*3+8], ascii_str[LINE_SIZE+8];
+ char *pbytes = bytes_str, *pascii = ascii_str;
+ int offset = 0;
+ long sizemask;
+ int field_width;
+ int index;
+ const unsigned char *pend_str;
+ const unsigned char *p;
+ int count;
+
+ /* verify size parameter */
+ if (size != sizeof(char) &&
+ size != sizeof(short) &&
+ size != sizeof(int)) {
+ printk(KERN_DEBUG "drbd_print_buffer: "
+ "ERROR invalid size %d\n", size);
+ return;
+ }
+
+ sizemask = size-1;
+ field_width = size*2;
+
+ /* Adjust start/end to be on appropriate boundary for size */
+ buffer = (const char *)((long)buffer & ~sizemask);
+ pend = (const unsigned char *)
+ (((long)buffer + length + sizemask) & ~sizemask);
+
+ if (flags & DBGPRINT_BUFFADDR) {
+ /* Move start back to nearest multiple of line size,
+ * if printing address. This results in nicely formatted output
+ * with addresses being on line size (16) byte boundaries */
+ pstart = (const unsigned char *)((long)buffer & ~(LINE_SIZE-1));
+ } else {
+ pstart = (const unsigned char *)buffer;
+ }
+
+ /* Set value of start VA to print if addresses asked for */
+ pstart_va = (const unsigned char *)buffer_va
+ - ((const unsigned char *)buffer-pstart);
+
+ /* Calculate end position to nicely align right hand side */
+ pend_str = pstart + (((pend-pstart) + LINE_SIZE-1) & ~(LINE_SIZE-1));
+
+ /* Init strings */
+ *pbytes = *pascii = '\0';
+
+ /* Start at beginning of first line */
+ p = pstart;
+ count = 0;
+
+ while (p < pend_str) {
+ if (p < (const unsigned char *)buffer || p >= pend) {
+ /* Before start of buffer or after end- print spaces */
+ pbytes += sprintf(pbytes, "%*c ", field_width, ' ');
+ pascii += sprintf(pascii, "%*c", size, ' ');
+ p += size;
+ } else {
+ /* Add hex and ascii to strings */
+ int val;
+ switch (size) {
+ default:
+ case 1:
+ val = *(unsigned char *)p;
+ break;
+ case 2:
+ val = *(unsigned short *)p;
+ break;
+ case 4:
+ val = *(unsigned int *)p;
+ break;
+ }
+
+ pbytes += sprintf(pbytes, "%0*x ", field_width, val);
+
+ for (index = size; index; index--) {
+ *pascii++ = isprint(*p) ? *p : '.';
+ p++;
+ }
+ }
+
+ count++;
+
+ if (count == LINE_ENTRIES || p >= pend_str) {
+ /* Null terminate and print record */
+ *pascii = '\0';
+ printk(KERN_DEBUG "%s%8.8lx: %*s|%*s|\n",
+ prefix,
+ (flags & DBGPRINT_BUFFADDR)
+ ? (long)pstart_va:(long)offset,
+ LINE_ENTRIES*(field_width+1), bytes_str,
+ LINE_SIZE, ascii_str);
+
+ /* Move onto next line */
+ pstart_va += (p-pstart);
+ pstart = p;
+ count = 0;
+ offset += LINE_SIZE;
+
+ /* Re-init strings */
+ pbytes = bytes_str;
+ pascii = ascii_str;
+ *pbytes = *pascii = '\0';
+ }
+ }
+}
+
+static void probe_drbd_resync(struct drbd_conf *mdev, int level, const char *fmt, va_list args)
+{
+ char str[256];
+
+ if (!is_mdev_trace(mdev, level))
+ return;
+
+ if (vsnprintf(str, 256, fmt, args) >= 256)
+ str[255] = 0;
+
+ printk(KERN_INFO "%s %s: %s", dev_driver_string(disk_to_dev(mdev->vdisk)),
+ dev_name(disk_to_dev(mdev->vdisk)), str);
+}
+
+static void probe_drbd_bio(struct drbd_conf *mdev, const char *pfx, struct bio *bio, int complete,
+ struct drbd_request *r)
+{
+#ifdef CONFIG_LBD
+#define SECTOR_FORMAT "%Lx"
+#else
+#define SECTOR_FORMAT "%lx"
+#endif
+#define SECTOR_SHIFT 9
+
+ unsigned long lowaddr = (unsigned long)(bio->bi_sector << SECTOR_SHIFT);
+ char *faddr = (char *)(lowaddr);
+ char rb[sizeof(void *)*2+6] = { 0, };
+ struct bio_vec *bvec;
+ int segno;
+
+ const int rw = bio->bi_rw;
+ const int biorw = (rw & (RW_MASK|RWA_MASK));
+ const int biobarrier = (rw & (1<<BIO_RW_BARRIER));
+ const int biosync = (rw & ((1<<BIO_RW_UNPLUG) | (1<<BIO_RW_SYNCIO)));
+
+ if (!is_mdev_trace(mdev, TRACE_LVL_ALWAYS))
+ return;
+
+ if (r)
+ sprintf(rb, "Req:%p ", r);
+
+ dev_info(DEV, "%s %s:%s%s%s Bio:%p %s- %soffset " SECTOR_FORMAT ", size %x\n",
+ complete ? "<<<" : ">>>",
+ pfx,
+ biorw == WRITE ? "Write" : "Read",
+ biobarrier ? " : B" : "",
+ biosync ? " : S" : "",
+ bio,
+ rb,
+ complete ? (bio_flagged(bio, BIO_UPTODATE) ? "Success, " : "Failed, ") : "",
+ bio->bi_sector << SECTOR_SHIFT,
+ bio->bi_size);
+
+ if (trace_level >= TRACE_LVL_METRICS &&
+ ((biorw == WRITE) ^ complete)) {
+ printk(KERN_DEBUG " ind page offset length\n");
+ __bio_for_each_segment(bvec, bio, segno, 0) {
+ printk(KERN_DEBUG " [%d] %p %8.8x %8.8x\n", segno,
+ bvec->bv_page, bvec->bv_offset, bvec->bv_len);
+
+ if (trace_level >= TRACE_LVL_ALL) {
+ char *bvec_buf;
+ unsigned long flags;
+
+ bvec_buf = bvec_kmap_irq(bvec, &flags);
+
+ drbd_print_buffer(" ", DBGPRINT_BUFFADDR, 1,
+ bvec_buf,
+ faddr,
+ (bvec->bv_len <= 0x80)
+ ? bvec->bv_len : 0x80);
+
+ bvec_kunmap_irq(bvec_buf, &flags);
+
+ if (bvec->bv_len > 0x40)
+ printk(KERN_DEBUG " ....\n");
+
+ faddr += bvec->bv_len;
+ }
+ }
+ }
+}
+
+static void probe_drbd_req(struct drbd_request *req, enum drbd_req_event what, char *msg)
+{
+ static const char *rq_event_names[] = {
+ [created] = "created",
+ [to_be_send] = "to_be_send",
+ [to_be_submitted] = "to_be_submitted",
+ [queue_for_net_write] = "queue_for_net_write",
+ [queue_for_net_read] = "queue_for_net_read",
+ [send_canceled] = "send_canceled",
+ [send_failed] = "send_failed",
+ [handed_over_to_network] = "handed_over_to_network",
+ [connection_lost_while_pending] =
+ "connection_lost_while_pending",
+ [recv_acked_by_peer] = "recv_acked_by_peer",
+ [write_acked_by_peer] = "write_acked_by_peer",
+ [neg_acked] = "neg_acked",
+ [conflict_discarded_by_peer] = "conflict_discarded_by_peer",
+ [barrier_acked] = "barrier_acked",
+ [data_received] = "data_received",
+ [read_completed_with_error] = "read_completed_with_error",
+ [write_completed_with_error] = "write_completed_with_error",
+ [completed_ok] = "completed_ok",
+ };
+
+ struct drbd_conf *mdev = req->mdev;
+
+ const int rw = (req->master_bio == NULL ||
+ bio_data_dir(req->master_bio) == WRITE) ?
+ 'W' : 'R';
+ const unsigned long s = req->rq_state;
+
+ if (what != nothing) {
+ dev_info(DEV, "_req_mod(%p %c ,%s)\n", req, rw, rq_event_names[what]);
+ } else {
+ dev_info(DEV, "%s %p %c L%c%c%cN%c%c%c%c%c %u (%llus +%u) %s\n",
+ msg, req, rw,
+ s & RQ_LOCAL_PENDING ? 'p' : '-',
+ s & RQ_LOCAL_COMPLETED ? 'c' : '-',
+ s & RQ_LOCAL_OK ? 'o' : '-',
+ s & RQ_NET_PENDING ? 'p' : '-',
+ s & RQ_NET_QUEUED ? 'q' : '-',
+ s & RQ_NET_SENT ? 's' : '-',
+ s & RQ_NET_DONE ? 'd' : '-',
+ s & RQ_NET_OK ? 'o' : '-',
+ req->epoch,
+ (unsigned long long)req->sector,
+ req->size,
+ conns_to_name(mdev->state.conn));
+ }
+}
+
+
+#define peers_to_name roles_to_name
+#define pdsks_to_name disks_to_name
+
+#define PSM(A) \
+do { \
+ if (mask.A) { \
+ int i = snprintf(p, len, " " #A "( %s )", \
+ A##s_to_name(val.A)); \
+ if (i >= len) \
+ return op; \
+ p += i; \
+ len -= i; \
+ } \
+} while (0)
+
+STATIC char *dump_st(char *p, int len, union drbd_state mask, union drbd_state val)
+{
+ char *op = p;
+ *p = '\0';
+ PSM(role);
+ PSM(peer);
+ PSM(conn);
+ PSM(disk);
+ PSM(pdsk);
+
+ return op;
+}
+
+#define INFOP(fmt, args...) \
+do { \
+ if (trace_level >= TRACE_LVL_ALL) { \
+ dev_info(DEV, "%s:%d: %s [%d] %s %s " fmt , \
+ file, line, current->comm, current->pid, \
+ sockname, recv ? "<<<" : ">>>" , \
+ ## args); \
+ } else { \
+ dev_info(DEV, "%s %s " fmt, sockname, \
+ recv ? "<<<" : ">>>" , \
+ ## args); \
+ } \
+} while (0)
+
+STATIC char *_dump_block_id(u64 block_id, char *buff)
+{
+ if (is_syncer_block_id(block_id))
+ strcpy(buff, "SyncerId");
+ else
+ sprintf(buff, "%llx", (unsigned long long)block_id);
+
+ return buff;
+}
+
+static void probe_drbd_packet(struct drbd_conf *mdev, struct socket *sock,
+ int recv, union p_polymorph *p, char *file, int line)
+{
+ char *sockname = sock == mdev->meta.socket ? "meta" : "data";
+ int cmd = (recv == 2) ? p->header.command : be16_to_cpu(p->header.command);
+ char tmp[300];
+ union drbd_state m, v;
+
+ switch (cmd) {
+ case P_HAND_SHAKE:
+ INFOP("%s (protocol %u-%u)\n", cmdname(cmd),
+ be32_to_cpu(p->handshake.protocol_min),
+ be32_to_cpu(p->handshake.protocol_max));
+ break;
+
+ case P_BITMAP: /* don't report this */
+ case P_COMPRESSED_BITMAP: /* don't report this */
+ break;
+
+ case P_DATA:
+ INFOP("%s (sector %llus, id %s, seq %u, f %x)\n", cmdname(cmd),
+ (unsigned long long)be64_to_cpu(p->data.sector),
+ _dump_block_id(p->data.block_id, tmp),
+ be32_to_cpu(p->data.seq_num),
+ be32_to_cpu(p->data.dp_flags)
+ );
+ break;
+
+ case P_DATA_REPLY:
+ case P_RS_DATA_REPLY:
+ INFOP("%s (sector %llus, id %s)\n", cmdname(cmd),
+ (unsigned long long)be64_to_cpu(p->data.sector),
+ _dump_block_id(p->data.block_id, tmp)
+ );
+ break;
+
+ case P_RECV_ACK:
+ case P_WRITE_ACK:
+ case P_RS_WRITE_ACK:
+ case P_DISCARD_ACK:
+ case P_NEG_ACK:
+ case P_NEG_RS_DREPLY:
+ INFOP("%s (sector %llus, size %u, id %s, seq %u)\n",
+ cmdname(cmd),
+ (long long)be64_to_cpu(p->block_ack.sector),
+ be32_to_cpu(p->block_ack.blksize),
+ _dump_block_id(p->block_ack.block_id, tmp),
+ be32_to_cpu(p->block_ack.seq_num)
+ );
+ break;
+
+ case P_DATA_REQUEST:
+ case P_RS_DATA_REQUEST:
+ INFOP("%s (sector %llus, size %u, id %s)\n", cmdname(cmd),
+ (long long)be64_to_cpu(p->block_req.sector),
+ be32_to_cpu(p->block_req.blksize),
+ _dump_block_id(p->block_req.block_id, tmp)
+ );
+ break;
+
+ case P_BARRIER:
+ case P_BARRIER_ACK:
+ INFOP("%s (barrier %u)\n", cmdname(cmd), p->barrier.barrier);
+ break;
+
+ case P_SYNC_PARAM:
+ case P_SYNC_PARAM89:
+ INFOP("%s (rate %u, verify-alg \"%.64s\", csums-alg \"%.64s\")\n",
+ cmdname(cmd), be32_to_cpu(p->rs_param_89.rate),
+ p->rs_param_89.verify_alg, p->rs_param_89.csums_alg);
+ break;
+
+ case P_UUIDS:
+ INFOP("%s Curr:%016llX, Bitmap:%016llX, "
+ "HisSt:%016llX, HisEnd:%016llX\n",
+ cmdname(cmd),
+ (unsigned long long)be64_to_cpu(p->uuids.uuid[UI_CURRENT]),
+ (unsigned long long)be64_to_cpu(p->uuids.uuid[UI_BITMAP]),
+ (unsigned long long)be64_to_cpu(p->uuids.uuid[UI_HISTORY_START]),
+ (unsigned long long)be64_to_cpu(p->uuids.uuid[UI_HISTORY_END]));
+ break;
+
+ case P_SIZES:
+ INFOP("%s (d %lluMiB, u %lluMiB, c %lldMiB, "
+ "max bio %x, q order %x)\n",
+ cmdname(cmd),
+ (long long)(be64_to_cpu(p->sizes.d_size)>>(20-9)),
+ (long long)(be64_to_cpu(p->sizes.u_size)>>(20-9)),
+ (long long)(be64_to_cpu(p->sizes.c_size)>>(20-9)),
+ be32_to_cpu(p->sizes.max_segment_size),
+ be32_to_cpu(p->sizes.queue_order_type));
+ break;
+
+ case P_STATE:
+ v.i = be32_to_cpu(p->state.state);
+ m.i = 0xffffffff;
+ dump_st(tmp, sizeof(tmp), m, v);
+ INFOP("%s (s %x {%s})\n", cmdname(cmd), v.i, tmp);
+ break;
+
+ case P_STATE_CHG_REQ:
+ m.i = be32_to_cpu(p->req_state.mask);
+ v.i = be32_to_cpu(p->req_state.val);
+ dump_st(tmp, sizeof(tmp), m, v);
+ INFOP("%s (m %x v %x {%s})\n", cmdname(cmd), m.i, v.i, tmp);
+ break;
+
+ case P_STATE_CHG_REPLY:
+ INFOP("%s (ret %x)\n", cmdname(cmd),
+ be32_to_cpu(p->req_state_reply.retcode));
+ break;
+
+ case P_PING:
+ case P_PING_ACK:
+ /*
+ * Dont trace pings at summary level
+ */
+ if (trace_level < TRACE_LVL_ALL)
+ break;
+ /* fall through... */
+ default:
+ INFOP("%s (%u)\n", cmdname(cmd), cmd);
+ break;
+ }
+}
+
+
+static int __init drbd_trace_init(void)
+{
+ int ret;
+
+ if (trace_mask & TRACE_UNPLUG) {
+ ret = register_trace_drbd_unplug(probe_drbd_unplug);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_UUID) {
+ ret = register_trace_drbd_uuid(probe_drbd_uuid);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_EE) {
+ ret = register_trace_drbd_ee(probe_drbd_ee);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_PACKET) {
+ ret = register_trace_drbd_packet(probe_drbd_packet);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_MD_IO) {
+ ret = register_trace_drbd_md_io(probe_drbd_md_io);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_EPOCH) {
+ ret = register_trace_drbd_epoch(probe_drbd_epoch);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_NL) {
+ ret = register_trace_drbd_netlink(probe_drbd_netlink);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_AL_EXT) {
+ ret = register_trace_drbd_actlog(probe_drbd_actlog);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_RQ) {
+ ret = register_trace_drbd_bio(probe_drbd_bio);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_INT_RQ) {
+ ret = register_trace_drbd_req(probe_drbd_req);
+ WARN_ON(ret);
+ }
+ if (trace_mask & TRACE_RESYNC) {
+ ret = register_trace__drbd_resync(probe_drbd_resync);
+ WARN_ON(ret);
+ }
+ return 0;
+}
+
+module_init(drbd_trace_init);
+
+static void __exit drbd_trace_exit(void)
+{
+ if (trace_mask & TRACE_UNPLUG)
+ unregister_trace_drbd_unplug(probe_drbd_unplug);
+ if (trace_mask & TRACE_UUID)
+ unregister_trace_drbd_uuid(probe_drbd_uuid);
+ if (trace_mask & TRACE_EE)
+ unregister_trace_drbd_ee(probe_drbd_ee);
+ if (trace_mask & TRACE_PACKET)
+ unregister_trace_drbd_packet(probe_drbd_packet);
+ if (trace_mask & TRACE_MD_IO)
+ unregister_trace_drbd_md_io(probe_drbd_md_io);
+ if (trace_mask & TRACE_EPOCH)
+ unregister_trace_drbd_epoch(probe_drbd_epoch);
+ if (trace_mask & TRACE_NL)
+ unregister_trace_drbd_netlink(probe_drbd_netlink);
+ if (trace_mask & TRACE_AL_EXT)
+ unregister_trace_drbd_actlog(probe_drbd_actlog);
+ if (trace_mask & TRACE_RQ)
+ unregister_trace_drbd_bio(probe_drbd_bio);
+ if (trace_mask & TRACE_INT_RQ)
+ unregister_trace_drbd_req(probe_drbd_req);
+ if (trace_mask & TRACE_RESYNC)
+ unregister_trace__drbd_resync(probe_drbd_resync);
+
+ tracepoint_synchronize_unregister();
+}
+
+module_exit(drbd_trace_exit);
--
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