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kernel
os
linux
fuse: add simple request tracepoints
I've been timing various fuse operations and it's quite annoying to do
with kprobes. Add two tracepoints for sending and ending fuse requests
to make it easier to debug and time various operations.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Bernd Schubert <bschubert@ddn.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
authored by
Josef Bacik
and committed by
Miklos Szeredi
396b209e
0acad928
+140
+3
fs/fuse/Makefile
+3
fs/fuse/Makefile
+5
fs/fuse/dev.c
+5
fs/fuse/dev.c
···
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#include <linux/splice.h>
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#include <linux/sched.h>
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#define CREATE_TRACE_POINTS
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#include "fuse_trace.h"
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MODULE_ALIAS_MISCDEV(FUSE_MINOR);
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MODULE_ALIAS("devname:fuse");
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···
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req->in.h.len = sizeof(struct fuse_in_header) +
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fuse_len_args(req->args->in_numargs,
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(struct fuse_arg *) req->args->in_args);
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trace_fuse_request_send(req);
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fiq->ops->send_req(fiq, req);
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}
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···
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if (test_and_set_bit(FR_FINISHED, &req->flags))
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goto put_request;
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trace_fuse_request_end(req);
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/*
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* test_and_set_bit() implies smp_mb() between bit
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* changing and below FR_INTERRUPTED check. Pairs with
+132
fs/fuse/fuse_trace.h
+132
fs/fuse/fuse_trace.h
···
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/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM fuse
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#if !defined(_TRACE_FUSE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_FUSE_H
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#include <linux/tracepoint.h>
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#define OPCODES \
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EM( FUSE_LOOKUP, "FUSE_LOOKUP") \
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EM( FUSE_FORGET, "FUSE_FORGET") \
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EM( FUSE_GETATTR, "FUSE_GETATTR") \
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EM( FUSE_SETATTR, "FUSE_SETATTR") \
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EM( FUSE_READLINK, "FUSE_READLINK") \
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EM( FUSE_SYMLINK, "FUSE_SYMLINK") \
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EM( FUSE_MKNOD, "FUSE_MKNOD") \
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EM( FUSE_MKDIR, "FUSE_MKDIR") \
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EM( FUSE_UNLINK, "FUSE_UNLINK") \
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EM( FUSE_RMDIR, "FUSE_RMDIR") \
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EM( FUSE_RENAME, "FUSE_RENAME") \
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EM( FUSE_LINK, "FUSE_LINK") \
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EM( FUSE_OPEN, "FUSE_OPEN") \
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EM( FUSE_READ, "FUSE_READ") \
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EM( FUSE_WRITE, "FUSE_WRITE") \
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EM( FUSE_STATFS, "FUSE_STATFS") \
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EM( FUSE_RELEASE, "FUSE_RELEASE") \
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EM( FUSE_FSYNC, "FUSE_FSYNC") \
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EM( FUSE_SETXATTR, "FUSE_SETXATTR") \
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EM( FUSE_GETXATTR, "FUSE_GETXATTR") \
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EM( FUSE_LISTXATTR, "FUSE_LISTXATTR") \
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EM( FUSE_REMOVEXATTR, "FUSE_REMOVEXATTR") \
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EM( FUSE_FLUSH, "FUSE_FLUSH") \
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EM( FUSE_INIT, "FUSE_INIT") \
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EM( FUSE_OPENDIR, "FUSE_OPENDIR") \
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EM( FUSE_READDIR, "FUSE_READDIR") \
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EM( FUSE_RELEASEDIR, "FUSE_RELEASEDIR") \
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EM( FUSE_FSYNCDIR, "FUSE_FSYNCDIR") \
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EM( FUSE_GETLK, "FUSE_GETLK") \
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EM( FUSE_SETLK, "FUSE_SETLK") \
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EM( FUSE_SETLKW, "FUSE_SETLKW") \
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EM( FUSE_ACCESS, "FUSE_ACCESS") \
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EM( FUSE_CREATE, "FUSE_CREATE") \
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EM( FUSE_INTERRUPT, "FUSE_INTERRUPT") \
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EM( FUSE_BMAP, "FUSE_BMAP") \
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EM( FUSE_DESTROY, "FUSE_DESTROY") \
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EM( FUSE_IOCTL, "FUSE_IOCTL") \
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EM( FUSE_POLL, "FUSE_POLL") \
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EM( FUSE_NOTIFY_REPLY, "FUSE_NOTIFY_REPLY") \
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EM( FUSE_BATCH_FORGET, "FUSE_BATCH_FORGET") \
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EM( FUSE_FALLOCATE, "FUSE_FALLOCATE") \
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EM( FUSE_READDIRPLUS, "FUSE_READDIRPLUS") \
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EM( FUSE_RENAME2, "FUSE_RENAME2") \
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EM( FUSE_LSEEK, "FUSE_LSEEK") \
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EM( FUSE_COPY_FILE_RANGE, "FUSE_COPY_FILE_RANGE") \
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EM( FUSE_SETUPMAPPING, "FUSE_SETUPMAPPING") \
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EM( FUSE_REMOVEMAPPING, "FUSE_REMOVEMAPPING") \
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EM( FUSE_SYNCFS, "FUSE_SYNCFS") \
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EM( FUSE_TMPFILE, "FUSE_TMPFILE") \
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EM( FUSE_STATX, "FUSE_STATX") \
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EMe(CUSE_INIT, "CUSE_INIT")
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/*
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* This will turn the above table into TRACE_DEFINE_ENUM() for each of the
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* entries.
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*/
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#undef EM
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#undef EMe
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#define EM(a, b) TRACE_DEFINE_ENUM(a);
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#define EMe(a, b) TRACE_DEFINE_ENUM(a);
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OPCODES
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/* Now we redfine it with the table that __print_symbolic needs. */
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#undef EM
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#undef EMe
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#define EM(a, b) {a, b},
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#define EMe(a, b) {a, b}
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TRACE_EVENT(fuse_request_send,
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TP_PROTO(const struct fuse_req *req),
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TP_ARGS(req),
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TP_STRUCT__entry(
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__field(dev_t, connection)
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__field(uint64_t, unique)
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__field(enum fuse_opcode, opcode)
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__field(uint32_t, len)
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),
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TP_fast_assign(
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__entry->connection = req->fm->fc->dev;
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__entry->unique = req->in.h.unique;
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__entry->opcode = req->in.h.opcode;
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__entry->len = req->in.h.len;
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),
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TP_printk("connection %u req %llu opcode %u (%s) len %u ",
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__entry->connection, __entry->unique, __entry->opcode,
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__print_symbolic(__entry->opcode, OPCODES), __entry->len)
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);
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TRACE_EVENT(fuse_request_end,
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TP_PROTO(const struct fuse_req *req),
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TP_ARGS(req),
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TP_STRUCT__entry(
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__field(dev_t, connection)
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__field(uint64_t, unique)
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__field(uint32_t, len)
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__field(int32_t, error)
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),
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TP_fast_assign(
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__entry->connection = req->fm->fc->dev;
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__entry->unique = req->in.h.unique;
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__entry->len = req->out.h.len;
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__entry->error = req->out.h.error;
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),
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TP_printk("connection %u req %llu len %u error %d", __entry->connection,
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__entry->unique, __entry->len, __entry->error)
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);
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#endif /* _TRACE_FUSE_H */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#define TRACE_INCLUDE_FILE fuse_trace
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#include <trace/define_trace.h>