aboutsummaryrefslogtreecommitdiff
path: root/nbd
diff options
context:
space:
mode:
authorEric Blake <eblake@redhat.com>2017-10-27 12:40:26 +0200
committerEric Blake <eblake@redhat.com>2017-10-30 21:07:21 +0100
commite7a78d0eff820b56d33be31af1bb49e2948374fd (patch)
tree89887ad46bd17d537a529b25d448271124ac174b /nbd
parentabf6e752e55b2f5afb48303429dea2db7c3a62de (diff)
downloadqemu-e7a78d0eff820b56d33be31af1bb49e2948374fd.zip
qemu-e7a78d0eff820b56d33be31af1bb49e2948374fd.tar.gz
qemu-e7a78d0eff820b56d33be31af1bb49e2948374fd.tar.bz2
nbd: Include error names in trace messages
NBD errors were originally sent over the wire based on Linux errno values; but not all the world is Linux, and not all platforms share the same values. Since a number isn't very easy to decipher on all platforms, update the trace messages to include the name of NBD errors being sent/received over the wire. Tweak the trace messages to be at the point where we are using the NBD error, not the translation to the host errno values. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20171027104037.8319-2-eblake@redhat.com>
Diffstat (limited to 'nbd')
-rw-r--r--nbd/client.c3
-rw-r--r--nbd/common.c23
-rw-r--r--nbd/nbd-internal.h1
-rw-r--r--nbd/server.c3
-rw-r--r--nbd/trace-events4
5 files changed, 30 insertions, 4 deletions
diff --git a/nbd/client.c b/nbd/client.c
index cd5a2c8..59d7c9d 100644
--- a/nbd/client.c
+++ b/nbd/client.c
@@ -940,6 +940,8 @@ int nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp)
reply->error = ldl_be_p(buf + 4);
reply->handle = ldq_be_p(buf + 8);
+ trace_nbd_receive_reply(magic, reply->error, nbd_err_lookup(reply->error),
+ reply->handle);
reply->error = nbd_errno_to_system_errno(reply->error);
if (reply->error == ESHUTDOWN) {
@@ -947,7 +949,6 @@ int nbd_receive_reply(QIOChannel *ioc, NBDReply *reply, Error **errp)
error_setg(errp, "server shutting down");
return -EINVAL;
}
- trace_nbd_receive_reply(magic, reply->error, reply->handle);
if (magic != NBD_SIMPLE_REPLY_MAGIC) {
error_setg(errp, "invalid magic (got 0x%" PRIx32 ")", magic);
diff --git a/nbd/common.c b/nbd/common.c
index 59a5316..7456021 100644
--- a/nbd/common.c
+++ b/nbd/common.c
@@ -148,3 +148,26 @@ const char *nbd_cmd_lookup(uint16_t cmd)
return "<unknown>";
}
}
+
+
+const char *nbd_err_lookup(int err)
+{
+ switch (err) {
+ case NBD_SUCCESS:
+ return "success";
+ case NBD_EPERM:
+ return "EPERM";
+ case NBD_EIO:
+ return "EIO";
+ case NBD_ENOMEM:
+ return "ENOMEM";
+ case NBD_EINVAL:
+ return "EINVAL";
+ case NBD_ENOSPC:
+ return "ENOSPC";
+ case NBD_ESHUTDOWN:
+ return "ESHUTDOWN";
+ default:
+ return "<unknown>";
+ }
+}
diff --git a/nbd/nbd-internal.h b/nbd/nbd-internal.h
index 11a130d..4bfe5be 100644
--- a/nbd/nbd-internal.h
+++ b/nbd/nbd-internal.h
@@ -126,6 +126,7 @@ const char *nbd_opt_lookup(uint32_t opt);
const char *nbd_rep_lookup(uint32_t rep);
const char *nbd_info_lookup(uint16_t info);
const char *nbd_cmd_lookup(uint16_t info);
+const char *nbd_err_lookup(int err);
int nbd_drop(QIOChannel *ioc, size_t size, Error **errp);
diff --git a/nbd/server.c b/nbd/server.c
index 3df3548..459e00c 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1227,7 +1227,8 @@ static int nbd_co_send_simple_reply(NBDClient *client,
{.iov_base = data, .iov_len = len}
};
- trace_nbd_co_send_simple_reply(handle, nbd_err, len);
+ trace_nbd_co_send_simple_reply(handle, nbd_err, nbd_err_lookup(nbd_err),
+ len);
set_be_simple_reply(&reply, nbd_err, handle);
return nbd_co_send_iov(client, iov, len ? 2 : 1, errp);
diff --git a/nbd/trace-events b/nbd/trace-events
index e27614f..920c8a0 100644
--- a/nbd/trace-events
+++ b/nbd/trace-events
@@ -29,7 +29,7 @@ nbd_client_loop_ret(int ret, const char *error) "NBD loop returned %d: %s"
nbd_client_clear_queue(void) "Clearing NBD queue"
nbd_client_clear_socket(void) "Clearing NBD socket"
nbd_send_request(uint64_t from, uint32_t len, uint64_t handle, uint16_t flags, uint16_t type, const char *name) "Sending request to server: { .from = %" PRIu64", .len = %" PRIu32 ", .handle = %" PRIu64 ", .flags = 0x%" PRIx16 ", .type = %" PRIu16 " (%s) }"
-nbd_receive_reply(uint32_t magic, int32_t error, uint64_t handle) "Got reply: { magic = 0x%" PRIx32 ", .error = % " PRId32 ", handle = %" PRIu64" }"
+nbd_receive_reply(uint32_t magic, int32_t error, const char *errname, uint64_t handle) "Got reply: { magic = 0x%" PRIx32 ", .error = %" PRId32 " (%s), handle = %" PRIu64" }"
# nbd/server.c
nbd_negotiate_send_rep_len(uint32_t opt, const char *optname, uint32_t type, const char *typename, uint32_t len) "Reply opt=0x%" PRIx32 " (%s), type=0x%" PRIx32 " (%s), len=%" PRIu32
@@ -53,7 +53,7 @@ nbd_negotiate_success(void) "Negotiation succeeded"
nbd_receive_request(uint32_t magic, uint16_t flags, uint16_t type, uint64_t from, uint32_t len) "Got request: { magic = 0x%" PRIx32 ", .flags = 0x%" PRIx16 ", .type = 0x%" PRIx16 ", from = %" PRIu64 ", len = %" PRIu32 " }"
nbd_blk_aio_attached(const char *name, void *ctx) "Export %s: Attaching clients to AIO context %p\n"
nbd_blk_aio_detach(const char *name, void *ctx) "Export %s: Detaching clients from AIO context %p\n"
-nbd_co_send_simple_reply(uint64_t handle, uint32_t error, int len) "Send simple reply: handle = %" PRIu64 ", error = %" PRIu32 ", len = %d"
+nbd_co_send_simple_reply(uint64_t handle, uint32_t error, const char *errname, int len) "Send simple reply: handle = %" PRIu64 ", error = %" PRIu32 " (%s), len = %d"
nbd_co_receive_request_decode_type(uint64_t handle, uint16_t type, const char *name) "Decoding type: handle = %" PRIu64 ", type = %" PRIu16 " (%s)"
nbd_co_receive_request_payload_received(uint64_t handle, uint32_t len) "Payload received: handle = %" PRIu64 ", len = %" PRIu32
nbd_co_receive_request_cmd_write(uint32_t len) "Reading %" PRIu32 " byte(s)"