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SubjectRe: [PATCH] net/9p: Convert net/9p protocol dumps to tracepoints
Date
On Tue, 9 Aug 2011 14:58:55 +0300, Pekka Enberg <penberg@kernel.org> wrote:
> On Tue, Aug 9, 2011 at 2:52 PM, Aneesh Kumar K.V
> <aneesh.kumar@linux.vnet.ibm.com> wrote:
> > This helps in more control over debugging.
> >
> > root@qemu-img-64:~# ls -al /pass/1234
> > ls: cannot access /pass/1234: No such file or directory
> > root@qemu-img-64:~# cat /sys/kernel/debug/tracing/trace
> > # tracer: nop
> > #
> > #           TASK-PID    CPU#    TIMESTAMP  FUNCTION
> > #              | |       |          |         |
> >              ls-1585  [001]   152.525239: 9p_protocol_dump: clnt 18446612132802834432 P9_TWALK(tag = 1)
> > 00000000: 17 00 00 00 6e 01 00 01 00 00
> > 00000020: 00 04 00 31 32 33 34 00 00 ff
> >
> >              ls-1585  [001]   152.525244: <stack trace>
> >  => trace_9p_protocol_dump
> >  => p9pdu_finalize
> >  => p9_client_rpc
> >  => p9_client_walk
> >  => v9fs_vfs_lookup
> >  => d_alloc_and_lookup
> >  => walk_component
> >  => path_lookupat
> >              ls-1585  [000]   152.526272: 9p_protocol_dump: clnt 18446612132802834432 P9_RLERROR(tag = 1)
> > 00000000: 0b 00 00 00 07 01 00 02 00 00
> > 00000020: 00 00 00 00 03 00 02 00 00 00
> >
> >              ls-1585  [000]   152.526275: <stack trace>
> >  => trace_9p_protocol_dump
> >  => p9_client_rpc
> >  => p9_client_walk
> >  => v9fs_vfs_lookup
> >  => d_alloc_and_lookup
> >  => walk_component
> >  => path_lookupat
> >  => do_path_lookup
> >
> >
> > Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
>
> Wow, cool!
>
> Acked-by: Pekka Enberg <penberg@kernel.org>
>
> I'm CC'ing Ingo and Steven in case they want to review how you used
> tracepoints here.
>

I did a version 2 . attaching below.

commit 159b1640350af72cdea3043feaf17f089f38d407
Author: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Sun Aug 7 00:46:59 2011 +0530

net/9p: Convert net/9p protocol dumps to tracepoints

This helps in more control over debugging.

root@qemu-img-64:~# mount -t 9p -oversion=9p2000.L,trans=virtio,cache=loose v_tmp /pass/
root@qemu-img-64:~# cat /sys/kernel/debug/tracing/trace_pipe
mount-1549 [000] 111.746149: 9p_protocol_dump: clnt 18446612132812210176 P9_TVERSION(tag = 65535)
00000000: 15 00 00 00 64 ff ff 00 20 00 00 08 00 39 50 32 ....d... ....9P2
00000010: 30 30 30 2e 4c 00 00 00 d9 82 a9 1d 00 88 ff ff 000.L...........
mount-1549 [000] 111.746154: <stack trace>
=> trace_9p_protocol_dump
=> p9pdu_finalize
=> p9_client_rpc
=> p9_client_create
=> v9fs_session_init
=> v9fs_mount
=> mount_fs
=> vfs_kern_mount
mount-1549 [000] 111.746318: 9p_protocol_dump: clnt 18446612132812210176 P9_RVERSION(tag = 65535)
00000000: 15 00 00 00 65 ff ff 00 20 00 00 08 00 39 50 32 ....e... ....9P2
00000010: 30 30 30 2e 4c 00 02 00 00 00 00 00 ff 43 00 00 000.L........C..
mount-1549 [000] 111.746320: <stack trace>
=> trace_9p_protocol_dump
=> p9_client_rpc
=> p9_client_create
=> v9fs_session_init
=> v9fs_mount
=> mount_fs
=> vfs_kern_mount
=> do_kern_mount
mount-1549 [000] 111.746368: 9p_protocol_dump: clnt 18446612132812210176 P9_TATTACH(tag = 1)
00000000: 1d 00 00 00 68 01 00 00 00 00 00 ff ff ff ff 06 ....h...........
00000010: 00 6e 6f 62 6f 64 79 00 00 ff ff ff ff ff ff ff .nobody.........
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>

diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index ce6600f..598fff1 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -165,9 +165,8 @@ static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
}
while (rdir->head < rdir->tail) {
p9stat_init(&st);
- err = p9stat_read(rdir->buf + rdir->head,
- rdir->tail - rdir->head, &st,
- fid->clnt->proto_version);
+ err = p9stat_read(fid->clnt, rdir->buf + rdir->head,
+ rdir->tail - rdir->head, &st);
if (err) {
P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);
err = -EIO;
@@ -241,10 +240,9 @@ static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent,

while (rdir->head < rdir->tail) {

- err = p9dirent_read(rdir->buf + rdir->head,
- rdir->tail - rdir->head,
- &curdirent,
- fid->clnt->proto_version);
+ err = p9dirent_read(fid->clnt, rdir->buf + rdir->head,
+ rdir->tail - rdir->head,
+ &curdirent);
if (err < 0) {
P9_DPRINTK(P9_DEBUG_VFS, "returned %d\n", err);
err = -EIO;
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index 2063a34..289b0ec 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -76,11 +76,8 @@ do { \
} \
} while (0)

-#define P9_DUMP_PKT(way, pdu) p9pdu_dump(way, pdu)
-
#else
#define P9_DPRINTK(level, format, arg...) do { } while (0)
-#define P9_DUMP_PKT(way, pdu) do { } while (0)
#endif


diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 55ce72c..5d07e53 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -240,8 +240,8 @@ int p9_client_read(struct p9_fid *fid, char *data, char __user *udata,
int p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,
u64 offset, u32 count);
int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset);
-int p9dirent_read(char *buf, int len, struct p9_dirent *dirent,
- int proto_version);
+int p9dirent_read(struct p9_client *clnt, char *buf, int len,
+ struct p9_dirent *dirent);
struct p9_wstat *p9_client_stat(struct p9_fid *fid);
int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst);
int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *attr);
@@ -259,7 +259,7 @@ struct p9_req_t *p9_tag_lookup(struct p9_client *, u16);
void p9_client_cb(struct p9_client *c, struct p9_req_t *req);

int p9_parse_header(struct p9_fcall *, int32_t *, int8_t *, int16_t *, int);
-int p9stat_read(char *, int, struct p9_wstat *, int);
+int p9stat_read(struct p9_client *, char *, int, struct p9_wstat *);
void p9stat_free(struct p9_wstat *);

int p9_is_proto_dotu(struct p9_client *clnt);
diff --git a/include/trace/events/9p.h b/include/trace/events/9p.h
new file mode 100644
index 0000000..380e561
--- /dev/null
+++ b/include/trace/events/9p.h
@@ -0,0 +1,169 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM 9p
+
+#if !defined(_TRACE_9P_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_9P_H
+
+#include <linux/tracepoint.h>
+
+#define show_9p_op(type) \
+ __print_symbolic(type, \
+ { P9_TLERROR, "P9_TLERROR" }, \
+ { P9_RLERROR, "P9_RLERROR" }, \
+ { P9_TSTATFS, "P9_TSTATFS" }, \
+ { P9_RSTATFS, "P9_RSTATFS" }, \
+ { P9_TLOPEN, "P9_TLOPEN" }, \
+ { P9_RLOPEN, "P9_RLOPEN" }, \
+ { P9_TLCREATE, "P9_TLCREATE" }, \
+ { P9_RLCREATE, "P9_RLCREATE" }, \
+ { P9_TSYMLINK, "P9_TSYMLINK" }, \
+ { P9_RSYMLINK, "P9_RSYMLINK" }, \
+ { P9_TMKNOD, "P9_TMKNOD" }, \
+ { P9_RMKNOD, "P9_RMKNOD" }, \
+ { P9_TRENAME, "P9_TRENAME" }, \
+ { P9_RRENAME, "P9_RRENAME" }, \
+ { P9_TREADLINK, "P9_TREADLINK" }, \
+ { P9_RREADLINK, "P9_RREADLINK" }, \
+ { P9_TGETATTR, "P9_TGETATTR" }, \
+ { P9_RGETATTR, "P9_RGETATTR" }, \
+ { P9_TSETATTR, "P9_TSETATTR" }, \
+ { P9_RSETATTR, "P9_RSETATTR" }, \
+ { P9_TXATTRWALK, "P9_TXATTRWALK" }, \
+ { P9_RXATTRWALK, "P9_RXATTRWALK" }, \
+ { P9_TXATTRCREATE, "P9_TXATTRCREATE" }, \
+ { P9_RXATTRCREATE, "P9_RXATTRCREATE" }, \
+ { P9_TREADDIR, "P9_TREADDIR" }, \
+ { P9_RREADDIR, "P9_RREADDIR" }, \
+ { P9_TFSYNC, "P9_TFSYNC" }, \
+ { P9_RFSYNC, "P9_RFSYNC" }, \
+ { P9_TLOCK, "P9_TLOCK" }, \
+ { P9_RLOCK, "P9_RLOCK" }, \
+ { P9_TGETLOCK, "P9_TGETLOCK" }, \
+ { P9_RGETLOCK, "P9_RGETLOCK" }, \
+ { P9_TLINK, "P9_TLINK" }, \
+ { P9_RLINK, "P9_RLINK" }, \
+ { P9_TMKDIR, "P9_TMKDIR" }, \
+ { P9_RMKDIR, "P9_RMKDIR" }, \
+ { P9_TRENAMEAT, "P9_TRENAMEAT" }, \
+ { P9_RRENAMEAT, "P9_RRENAMEAT" }, \
+ { P9_TUNLINKAT, "P9_TUNLINKAT" }, \
+ { P9_RUNLINKAT, "P9_RUNLINKAT" }, \
+ { P9_TVERSION, "P9_TVERSION" }, \
+ { P9_RVERSION, "P9_RVERSION" }, \
+ { P9_TAUTH, "P9_TAUTH" }, \
+ { P9_RAUTH, "P9_RAUTH" }, \
+ { P9_TATTACH, "P9_TATTACH" }, \
+ { P9_RATTACH, "P9_RATTACH" }, \
+ { P9_TERROR, "P9_TERROR" }, \
+ { P9_RERROR, "P9_RERROR" }, \
+ { P9_TFLUSH, "P9_TFLUSH" }, \
+ { P9_RFLUSH, "P9_RFLUSH" }, \
+ { P9_TWALK, "P9_TWALK" }, \
+ { P9_RWALK, "P9_RWALK" }, \
+ { P9_TOPEN, "P9_TOPEN" }, \
+ { P9_ROPEN, "P9_ROPEN" }, \
+ { P9_TCREATE, "P9_TCREATE" }, \
+ { P9_RCREATE, "P9_RCREATE" }, \
+ { P9_TREAD, "P9_TREAD" }, \
+ { P9_RREAD, "P9_RREAD" }, \
+ { P9_TWRITE, "P9_TWRITE" }, \
+ { P9_RWRITE, "P9_RWRITE" }, \
+ { P9_TCLUNK, "P9_TCLUNK" }, \
+ { P9_RCLUNK, "P9_RCLUNK" }, \
+ { P9_TREMOVE, "P9_TREMOVE" }, \
+ { P9_RREMOVE, "P9_RREMOVE" }, \
+ { P9_TSTAT, "P9_TSTAT" }, \
+ { P9_RSTAT, "P9_RSTAT" }, \
+ { P9_TWSTAT, "P9_TWSTAT" }, \
+ { P9_RWSTAT, "P9_RWSTAT" })
+
+TRACE_EVENT(9p_client_req,
+ TP_PROTO(struct p9_client *clnt, int8_t type, int tag),
+
+ TP_ARGS(clnt, type, tag),
+
+ TP_STRUCT__entry(
+ /*
+ * FIXME can i have void * as type. If so will it
+ * cause issue when i read trace from a 64 bit machine
+ * on a 32 bit machine.
+ */
+ __field( __u64, clnt )
+ __field( __u8, type )
+ __field( __u32, tag )
+ ),
+
+ TP_fast_assign(
+ __entry->clnt = (__u64)clnt;
+ __entry->type = type;
+ __entry->tag = tag;
+ ),
+
+ TP_printk("client %lu request %s tag %d",
+ (long)__entry->clnt, show_9p_op(__entry->type),
+ __entry->tag)
+ );
+
+TRACE_EVENT(9p_client_res,
+ TP_PROTO(struct p9_client *clnt, int8_t type, int tag, int err),
+
+ TP_ARGS(clnt, type, tag, err),
+
+ TP_STRUCT__entry(
+ /*
+ * FIXME can i have void * as type. If so will it
+ * cause issue when i read trace from a 64 bit machine
+ * on a 32 bit machine.
+ */
+ __field( __u64, clnt )
+ __field( __u8, type )
+ __field( __u32, tag )
+ __field( __u32, err )
+ ),
+
+ TP_fast_assign(
+ __entry->clnt = (__u64)clnt;
+ __entry->type = type;
+ __entry->tag = tag;
+ __entry->err = err;
+ ),
+
+ TP_printk("client %lu response %s tag %d err %d",
+ (long)__entry->clnt, show_9p_op(__entry->type),
+ __entry->tag, __entry->err)
+);
+
+#define P9_PROTO_DUMP_SZ (16 * 3 + 2 + 16 + 1)
+TRACE_EVENT(9p_protocol_dump,
+ TP_PROTO(struct p9_client *clnt, struct p9_fcall *pdu),
+
+ TP_ARGS(clnt, pdu),
+
+ TP_STRUCT__entry(
+ __field( __u64, clnt )
+ __field( __u8, type )
+ __field( __u16, tag )
+ __array( unsigned char, line1, P9_PROTO_DUMP_SZ )
+ __array( unsigned char, line2, P9_PROTO_DUMP_SZ )
+ ),
+
+ TP_fast_assign(
+ const u8 *ptr = pdu->sdata;
+ __entry->clnt = (__u64)clnt;
+ __entry->type = pdu->id;
+ __entry->tag = pdu->tag;
+ hex_dump_to_buffer(ptr, 16, 16,
+ 1, __entry->line1, P9_PROTO_DUMP_SZ, true);
+ hex_dump_to_buffer(ptr + 16, 16, 16,
+ 1, __entry->line2, P9_PROTO_DUMP_SZ, true);
+ ),
+
+ TP_printk("clnt %lu %s(tag = %d)\n%.8x: %s\n%.8x: %s\n",
+ (long)__entry->clnt, show_9p_op(__entry->type),
+ __entry->tag, 0, __entry->line1, 16 , __entry->line2)
+ );
+
+#endif /* _TRACE_9P_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/net/9p/client.c b/net/9p/client.c
index d094ce9..ad1ab84 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -38,6 +38,9 @@
#include <net/9p/transport.h>
#include "protocol.h"

+#define CREATE_TRACE_POINTS
+#include <trace/events/9p.h>
+
/*
* Client Option Parsing (code inspired by NFS code)
* - a little lazy - parse all client options
@@ -703,8 +706,9 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
va_end(ap);
if (err)
goto reterr;
- p9pdu_finalize(req->tc);
+ p9pdu_finalize(c, req->tc);

+ trace_9p_client_req(c, type, tag);
err = c->trans_mod->request(c, req);
if (err < 0) {
if (err != -ERESTARTSYS && err != -EFAULT)
@@ -746,14 +750,17 @@ p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...)
goto reterr;

err = p9_check_errors(c, req);
+ /*
+ * dump the response from server
+ * This should be after check errors which poplulate pdu_fcall.
+ */
+ trace_9p_protocol_dump(c, req->rc);
+ trace_9p_client_res(c, type, tag, err);
if (!err) {
P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type);
return req;
}
-
reterr:
- P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type,
- err);
p9_free_req(c, req);
return ERR_PTR(err);
}
@@ -823,7 +830,7 @@ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type,
va_end(ap);
if (err)
goto reterr;
- p9pdu_finalize(req->tc);
+ p9pdu_finalize(c, req->tc);

err = c->trans_mod->zc_request(c, req, uidata, uodata,
inlen, olen, in_hdrlen, kern_buf);
@@ -857,10 +864,17 @@ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type,
goto reterr;

err = p9_check_zc_errors(c, req, uidata, in_hdrlen, kern_buf);
+ /*
+ * dump the response from server
+ * This should be after check errors which poplulate pdu_fcall.
+ */
+ trace_9p_protocol_dump(c, req->rc);
+ trace_9p_client_res(c, type, tag, err);
if (!err) {
P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type);
return req;
}
+
reterr:
P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type,
err);
@@ -951,7 +965,7 @@ static int p9_client_version(struct p9_client *c)
err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version);
if (err) {
P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err);
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(c, req->rc);
goto error;
}

@@ -1088,15 +1102,14 @@ EXPORT_SYMBOL(p9_client_begin_disconnect);
struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,
char *uname, u32 n_uname, char *aname)
{
- int err;
+ int err = 0;
struct p9_req_t *req;
struct p9_fid *fid;
struct p9_qid qid;

- P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
- afid ? afid->fid : -1, uname, aname);
- err = 0;

+ P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n",
+ afid ? afid->fid : -1, uname, aname);
fid = p9_fid_create(clnt);
if (IS_ERR(fid)) {
err = PTR_ERR(fid);
@@ -1113,7 +1126,7 @@ struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid,

err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
p9_free_req(clnt, req);
goto error;
}
@@ -1173,7 +1186,7 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, uint16_t nwname,

err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
p9_free_req(clnt, req);
goto clunk_fid;
}
@@ -1240,7 +1253,7 @@ int p9_client_open(struct p9_fid *fid, int mode)

err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto free_and_error;
}

@@ -1283,7 +1296,7 @@ int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode,

err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto free_and_error;
}

@@ -1328,7 +1341,7 @@ int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,

err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto free_and_error;
}

@@ -1367,7 +1380,7 @@ int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid,

err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto free_and_error;
}

@@ -1558,12 +1571,11 @@ p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset,

err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto free_and_error;
}

P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count);
- P9_DUMP_PKT(1, req->rc);

if (non_zc) {
if (data) {
@@ -1633,7 +1645,7 @@ p9_client_write(struct p9_fid *fid, char *data, const char __user *udata,

err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto free_and_error;
}

@@ -1673,7 +1685,7 @@ struct p9_wstat *p9_client_stat(struct p9_fid *fid)

err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
p9_free_req(clnt, req);
goto error;
}
@@ -1724,7 +1736,7 @@ struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid,

err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
p9_free_req(clnt, req);
goto error;
}
@@ -1872,7 +1884,7 @@ int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
&sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail,
&sb->files, &sb->ffree, &sb->fsid, &sb->namelen);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
p9_free_req(clnt, req);
goto error;
}
@@ -1979,7 +1991,7 @@ struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid,
}
err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
p9_free_req(clnt, req);
goto clunk_fid;
}
@@ -2063,7 +2075,7 @@ int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset)

err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto free_and_error;
}

@@ -2100,7 +2112,7 @@ int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode,

err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type,
@@ -2131,7 +2143,7 @@ int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,

err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type,
@@ -2166,7 +2178,7 @@ int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status)

err = p9pdu_readf(req->rc, clnt->proto_version, "b", status);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status);
@@ -2199,7 +2211,7 @@ int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock)
&glock->start, &glock->length, &glock->proc_id,
&glock->client_id);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld "
@@ -2227,7 +2239,7 @@ int p9_client_readlink(struct p9_fid *fid, char **target)

err = p9pdu_readf(req->rc, clnt->proto_version, "s", target);
if (err) {
- P9_DUMP_PKT(1, req->rc);
+ trace_9p_protocol_dump(clnt, req->rc);
goto error;
}
P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target);
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index b7d4e8a..55e10a9 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -37,40 +37,11 @@
#include <net/9p/client.h>
#include "protocol.h"

+#include <trace/events/9p.h>
+
static int
p9pdu_writef(struct p9_fcall *pdu, int proto_version, const char *fmt, ...);

-#ifdef CONFIG_NET_9P_DEBUG
-void
-p9pdu_dump(int way, struct p9_fcall *pdu)
-{
- int len = pdu->size;
-
- if ((p9_debug_level & P9_DEBUG_VPKT) != P9_DEBUG_VPKT) {
- if ((p9_debug_level & P9_DEBUG_PKT) == P9_DEBUG_PKT) {
- if (len > 32)
- len = 32;
- } else {
- /* shouldn't happen */
- return;
- }
- }
-
- if (way)
- print_hex_dump_bytes("[9P] ", DUMP_PREFIX_OFFSET, pdu->sdata,
- len);
- else
- print_hex_dump_bytes("]9P[ ", DUMP_PREFIX_OFFSET, pdu->sdata,
- len);
-}
-#else
-void
-p9pdu_dump(int way, struct p9_fcall *pdu)
-{
-}
-#endif
-EXPORT_SYMBOL(p9pdu_dump);
-
void p9stat_free(struct p9_wstat *stbuf)
{
kfree(stbuf->name);
@@ -551,7 +522,7 @@ p9pdu_writef(struct p9_fcall *pdu, int proto_version, const char *fmt, ...)
return ret;
}

-int p9stat_read(char *buf, int len, struct p9_wstat *st, int proto_version)
+int p9stat_read(struct p9_client *clnt, char *buf, int len, struct p9_wstat *st)
{
struct p9_fcall fake_pdu;
int ret;
@@ -561,10 +532,10 @@ int p9stat_read(char *buf, int len, struct p9_wstat *st, int proto_version)
fake_pdu.sdata = buf;
fake_pdu.offset = 0;

- ret = p9pdu_readf(&fake_pdu, proto_version, "S", st);
+ ret = p9pdu_readf(&fake_pdu, clnt->proto_version, "S", st);
if (ret) {
P9_DPRINTK(P9_DEBUG_9P, "<<< p9stat_read failed: %d\n", ret);
- P9_DUMP_PKT(0, &fake_pdu);
+ trace_9p_protocol_dump(clnt, &fake_pdu);
}

return ret;
@@ -577,7 +548,7 @@ int p9pdu_prepare(struct p9_fcall *pdu, int16_t tag, int8_t type)
return p9pdu_writef(pdu, 0, "dbw", 0, type, tag);
}

-int p9pdu_finalize(struct p9_fcall *pdu)
+int p9pdu_finalize(struct p9_client *clnt, struct p9_fcall *pdu)
{
int size = pdu->size;
int err;
@@ -586,7 +557,7 @@ int p9pdu_finalize(struct p9_fcall *pdu)
err = p9pdu_writef(pdu, 0, "d", size);
pdu->size = size;

- P9_DUMP_PKT(0, pdu);
+ trace_9p_protocol_dump(clnt, pdu);
P9_DPRINTK(P9_DEBUG_9P, ">>> size=%d type: %d tag: %d\n", pdu->size,
pdu->id, pdu->tag);

@@ -599,8 +570,8 @@ void p9pdu_reset(struct p9_fcall *pdu)
pdu->size = 0;
}

-int p9dirent_read(char *buf, int len, struct p9_dirent *dirent,
- int proto_version)
+int p9dirent_read(struct p9_client *clnt, char *buf, int len,
+ struct p9_dirent *dirent)
{
struct p9_fcall fake_pdu;
int ret;
@@ -611,11 +582,11 @@ int p9dirent_read(char *buf, int len, struct p9_dirent *dirent,
fake_pdu.sdata = buf;
fake_pdu.offset = 0;

- ret = p9pdu_readf(&fake_pdu, proto_version, "Qqbs", &dirent->qid,
- &dirent->d_off, &dirent->d_type, &nameptr);
+ ret = p9pdu_readf(&fake_pdu, clnt->proto_version, "Qqbs", &dirent->qid,
+ &dirent->d_off, &dirent->d_type, &nameptr);
if (ret) {
P9_DPRINTK(P9_DEBUG_9P, "<<< p9dirent_read failed: %d\n", ret);
- P9_DUMP_PKT(1, &fake_pdu);
+ trace_9p_protocol_dump(clnt, &fake_pdu);
goto out;
}

diff --git a/net/9p/protocol.h b/net/9p/protocol.h
index e5083f3..b0a6aa8f 100644
--- a/net/9p/protocol.h
+++ b/net/9p/protocol.h
@@ -29,8 +29,7 @@ int p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
va_list ap);
int p9pdu_readf(struct p9_fcall *pdu, int proto_version, const char *fmt, ...);
int p9pdu_prepare(struct p9_fcall *pdu, int16_t tag, int8_t type);
-int p9pdu_finalize(struct p9_fcall *pdu);
-void p9pdu_dump(int, struct p9_fcall *);
+int p9pdu_finalize(struct p9_client *clnt, struct p9_fcall *pdu);
void p9pdu_reset(struct p9_fcall *pdu);
size_t pdu_read(struct p9_fcall *pdu, void *data, size_t size);

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