| Message ID | 5127A82C.5040608@inktank.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index bd6078b..a9c86ca 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -443,7 +443,7 @@ static struct rbd_client *rbd_client_create(struct ceph_options *ceph_opts) struct rbd_client *rbdc; int ret = -ENOMEM; - dout("rbd_client_create\n"); + dout("%s:\n", __func__); rbdc = kmalloc(sizeof(struct rbd_client), GFP_KERNEL); if (!rbdc)
Add dout() calls to facilitate tracing of image and object requests. Change a few existing calls so they use __func__ rather than the hard-coded function name. Have calls always add ":" after the name of the function, and prefix pointer values with a consistent tag indicating what it represents. (Note that there remain some older dout() calls that are left untouched by this patch.) Issue a warning if rbd_osd_write_callback() ever gets a short write. This resolves: http://tracker.ceph.com/issues/4235 Signed-off-by: Alex Elder <elder@inktank.com> --- drivers/block/rbd.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 61 insertions(+), 5 deletions(-) goto out_opt; @@ -467,8 +467,8 @@ static struct rbd_client *rbd_client_create(struct ceph_options *ceph_opts) spin_unlock(&rbd_client_list_lock); mutex_unlock(&ctl_mutex); + dout("%s: rbdc %p\n", __func__, rbdc); - dout("rbd_client_create created %p\n", rbdc); return rbdc; out_err: @@ -479,6 +479,8 @@ out_mutex: out_opt: if (ceph_opts) ceph_destroy_options(ceph_opts); + dout("%s: error %d\n", __func__, ret); + return ERR_PTR(ret); } @@ -605,7 +607,7 @@ static void rbd_client_release(struct kref *kref) { struct rbd_client *rbdc = container_of(kref, struct rbd_client, kref); - dout("rbd_release_client %p\n", rbdc); + dout("%s: rbdc %p\n", __func__, rbdc); spin_lock(&rbd_client_list_lock); list_del(&rbdc->node); spin_unlock(&rbd_client_list_lock); @@ -1064,6 +1066,8 @@ out_err: static void rbd_obj_request_get(struct rbd_obj_request *obj_request) { + dout("%s: obj %p (was %d)\n", __func__, obj_request, + atomic_read(&obj_request->kref.refcount)); kref_get(&obj_request->kref); } @@ -1071,11 +1075,15 @@ static void rbd_obj_request_destroy(struct kref *kref); static void rbd_obj_request_put(struct rbd_obj_request *obj_request) { rbd_assert(obj_request != NULL); + dout("%s: obj %p (was %d)\n", __func__, obj_request, + atomic_read(&obj_request->kref.refcount)); kref_put(&obj_request->kref, rbd_obj_request_destroy); } static void rbd_img_request_get(struct rbd_img_request *img_request) { + dout("%s: img %p (was %d)\n", __func__, img_request, + atomic_read(&img_request->kref.refcount)); kref_get(&img_request->kref); } @@ -1083,6 +1091,8 @@ static void rbd_img_request_destroy(struct kref *kref); static void rbd_img_request_put(struct rbd_img_request *img_request) { rbd_assert(img_request != NULL); + dout("%s: img %p (was %d)\n", __func__, img_request, + atomic_read(&img_request->kref.refcount)); kref_put(&img_request->kref, rbd_img_request_destroy); } @@ -1097,6 +1107,8 @@ static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request, rbd_assert(obj_request->which != BAD_WHICH); img_request->obj_request_count++; list_add_tail(&obj_request->links, &img_request->obj_requests); + dout("%s: img %p obj %p w=%u\n", __func__, img_request, obj_request, + obj_request->which); } static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request, @@ -1104,6 +1116,8 @@ static inline void rbd_img_obj_request_del(struct rbd_img_request *img_request, { rbd_assert(obj_request->which != BAD_WHICH); + dout("%s: img %p obj %p w=%u\n", __func__, img_request, obj_request, + obj_request->which); list_del(&obj_request->links); rbd_assert(img_request->obj_request_count > 0); img_request->obj_request_count--; @@ -1200,11 +1214,14 @@ static void rbd_osd_req_op_destroy(struct ceph_osd_req_op *op) static int rbd_obj_request_submit(struct ceph_osd_client *osdc, struct rbd_obj_request *obj_request) { + dout("%s: osdc %p obj %p\n", __func__, osdc, obj_request); + return ceph_osdc_start_request(osdc, obj_request->osd_req, false); } static void rbd_img_request_complete(struct rbd_img_request *img_request) { + dout("%s: img %p\n", __func__, img_request); if (img_request->callback) img_request->callback(img_request); else @@ -1215,6 +1232,8 @@ static void rbd_img_request_complete(struct rbd_img_request *img_request) static int rbd_obj_request_wait(struct rbd_obj_request *obj_request) { + dout("%s: obj %p\n", __func__, obj_request); + return wait_for_completion_interruptible(&obj_request->completion); } @@ -1248,11 +1267,14 @@ static bool obj_request_done_test(struct rbd_obj_request *obj_request) static void rbd_osd_trivial_callback(struct rbd_obj_request *obj_request, struct ceph_osd_op *op) { + dout("%s: obj %p\n", __func__, obj_request); obj_request_done_set(obj_request); } static void rbd_obj_request_complete(struct rbd_obj_request *obj_request) { + dout("%s: obj %p cb %p\n", __func__, obj_request, + obj_request->callback); if (obj_request->callback) obj_request->callback(obj_request); else @@ -1270,6 +1292,8 @@ static void rbd_osd_read_callback(struct rbd_obj_request *obj_request, */ xferred = le64_to_cpu(op->extent.length); rbd_assert(xferred < (u64) UINT_MAX); + dout("%s: obj %p result %d %llu/%llu\n", __func__, obj_request, + obj_request->result, xferred, obj_request->length); if (obj_request->result == (s32) -ENOENT) { zero_bio_chain(obj_request->bio_list, 0); obj_request->result = 0; @@ -1284,7 +1308,22 @@ static void rbd_osd_read_callback(struct rbd_obj_request *obj_request, static void rbd_osd_write_callback(struct rbd_obj_request *obj_request, struct ceph_osd_op *op) { + obj_request->xferred = le64_to_cpu(op->extent.length); + dout("%s: obj %p result %d %llu/%llu\n", __func__, obj_request, + obj_request->result, obj_request->xferred, obj_request->length); + + /* A short write really shouldn't occur. Warn if we see one */ + + if (obj_request->xferred != obj_request->length) { + struct rbd_img_request *img_request = obj_request->img_request; + struct rbd_device *rbd_dev; + + rbd_dev = img_request ? img_request->rbd_dev : NULL; + rbd_warn(rbd_dev, "wrote %llu want %llu\n", + obj_request->xferred, obj_request->length); + } + obj_request_done_set(obj_request); } @@ -1295,6 +1334,7 @@ static void rbd_osd_write_callback(struct rbd_obj_request *obj_request, static void rbd_osd_stat_callback(struct rbd_obj_request *obj_request, struct ceph_osd_op *op) { + dout("%s: obj %p\n", __func__, obj_request); obj_request_done_set(obj_request); } @@ -1307,6 +1347,7 @@ static void rbd_osd_req_callback(struct ceph_osd_request *osd_req, u32 num_ops; u16 opcode; + dout("%s: osd_req %p msg %p\n", __func__, osd_req, msg); rbd_assert(osd_req == obj_request->osd_req); rbd_assert(!!obj_request->img_request ^ (obj_request->which == BAD_WHICH)); @@ -1453,6 +1494,9 @@ static struct rbd_obj_request *rbd_obj_request_create(const char *object_name, init_completion(&obj_request->completion); kref_init(&obj_request->kref); + dout("%s: \"%s\" %llu/%llu %d -> obj %p\n", __func__, object_name, + offset, length, (int)type, obj_request); + return obj_request; } @@ -1462,6 +1506,8 @@ static void rbd_obj_request_destroy(struct kref *kref) obj_request = container_of(kref, struct rbd_obj_request, kref); + dout("%s: obj %p\n", __func__, obj_request); + rbd_assert(obj_request->img_request == NULL); rbd_assert(obj_request->which == BAD_WHICH); @@ -1531,6 +1577,10 @@ struct rbd_img_request *rbd_img_request_create(struct rbd_device *rbd_dev, rbd_img_request_get(img_request); /* Avoid a warning */ rbd_img_request_put(img_request); /* TEMPORARY */ + dout("%s: rbd_dev %p %s %llu/%llu -> img %p\n", __func__, rbd_dev, + write_request ? "write" : "read", offset, length, + img_request); + return img_request; } @@ -1542,6 +1592,8 @@ static void rbd_img_request_destroy(struct kref *kref) img_request = container_of(kref, struct rbd_img_request, kref); + dout("%s: img %p\n", __func__, img_request); + for_each_obj_request_safe(img_request, obj_request, next_obj_request) rbd_img_obj_request_del(img_request, obj_request); rbd_assert(img_request->obj_request_count == 0); @@ -1563,6 +1615,8 @@ static int rbd_img_request_fill_bio(struct rbd_img_request *img_request, u64 resid; u16 opcode; + dout("%s: img %p bio %p\n", __func__, img_request, bio_list); + opcode = img_request->write_request ? CEPH_OSD_OP_WRITE : CEPH_OSD_OP_READ; bio_offset = 0; @@ -1638,6 +1692,7 @@ static void rbd_img_obj_callback(struct rbd_obj_request *obj_request) img_request = obj_request->img_request; + dout("%s: img %p obj %p\n", __func__, img_request, obj_request); rbd_assert(img_request != NULL); rbd_assert(img_request->rq != NULL); rbd_assert(img_request->obj_request_count > 0); @@ -1685,6 +1740,7 @@ static int rbd_img_request_submit(struct rbd_img_request *img_request) struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; struct rbd_obj_request *obj_request; + dout("%s: img %p\n", __func__, img_request); for_each_obj_request(img_request, obj_request) { int ret; @@ -1745,7 +1801,7 @@ static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) if (!rbd_dev) return; - dout("rbd_watch_cb %s notify_id=%llu opcode=%u\n", + dout("%s: \"%s\" notify_id %llu opcode %u\n", __func__, rbd_dev->header_name, (unsigned long long) notify_id, (unsigned int) opcode); rc = rbd_dev_refresh(rbd_dev, &hver); @@ -3371,7 +3427,7 @@ static int rbd_dev_snaps_register(struct rbd_device *rbd_dev) struct rbd_snap *snap; int ret = 0; - dout("%s called\n", __func__); + dout("%s:\n", __func__); if (WARN_ON(!device_is_registered(&rbd_dev->dev))) return -EIO;