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Member "drbd-8.3.15/drbd/drbd_tracing.c" of archive drbd-8.3.15.tar.gz:
/*
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@linbit.com>.
Copyright (C) 2003-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
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 "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_RESPONSE(name, number) \
[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->ldev->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, "Allocate 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 ret: %d\n",
nlp->minor,
nl_packet_name(nlp->packet_type),
nlp->packet_type,
msg->seq, msg->ack, msg->len, nlp->ret_code);
}
}
static void probe_drbd_actlog(struct drbd_conf *mdev, sector_t sector, char* msg)
{
unsigned int enr = (sector >> (AL_EXTENT_SHIFT-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() - Hexdump arbitrary binary data into a buffer
* @prefix: String is output at the beginning of each line output.
* @flags: Currently only defined flag: 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.
* @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)
{
#if defined(CONFIG_LBDAF) || defined(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));
#ifdef BIO_RW_SYNC
const int biosync = (rw & (1<<BIO_RW_SYNC));
#else
const int biosync = (rw & ((1<<BIO_RW_SYNCIO) | (1<<BIO_RW_UNPLUG)));
#endif
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) {
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",
[read_ahead_completed_with_error] = "reada_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,
drbd_conn_str(mdev->state.conn));
}
}
#define drbd_peer_str drbd_role_str
#define drbd_pdsk_str drbd_disk_str
#define PSM(A) \
do { \
if (mask.A) { \
int i = snprintf(p, len, " " #A "( %s )", \
drbd_##A##_str(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;
char tmp[300];
union drbd_state m, v;
cmd = be16_to_cpu(p->header.h80.magic == BE_DRBD_MAGIC ?
p->header.h80.command : p->header.h95.command);
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_bio_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);