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Diffstat (limited to 'net/ceph/osd_client.c')
-rw-r--r--net/ceph/osd_client.c334
1 files changed, 324 insertions, 10 deletions
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 658a6f2320cf..d3a759e052c8 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -171,6 +171,13 @@ static void ceph_osd_data_bvecs_init(struct ceph_osd_data *osd_data,
osd_data->num_bvecs = num_bvecs;
}
+static void ceph_osd_iter_init(struct ceph_osd_data *osd_data,
+ struct iov_iter *iter)
+{
+ osd_data->type = CEPH_OSD_DATA_TYPE_ITER;
+ osd_data->iter = *iter;
+}
+
static struct ceph_osd_data *
osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
{
@@ -264,6 +271,22 @@ void osd_req_op_extent_osd_data_bvec_pos(struct ceph_osd_request *osd_req,
}
EXPORT_SYMBOL(osd_req_op_extent_osd_data_bvec_pos);
+/**
+ * osd_req_op_extent_osd_iter - Set up an operation with an iterator buffer
+ * @osd_req: The request to set up
+ * @which: Index of the operation in which to set the iter
+ * @iter: The buffer iterator
+ */
+void osd_req_op_extent_osd_iter(struct ceph_osd_request *osd_req,
+ unsigned int which, struct iov_iter *iter)
+{
+ struct ceph_osd_data *osd_data;
+
+ osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
+ ceph_osd_iter_init(osd_data, iter);
+}
+EXPORT_SYMBOL(osd_req_op_extent_osd_iter);
+
static void osd_req_op_cls_request_info_pagelist(
struct ceph_osd_request *osd_req,
unsigned int which, struct ceph_pagelist *pagelist)
@@ -346,6 +369,8 @@ static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
#endif /* CONFIG_BLOCK */
case CEPH_OSD_DATA_TYPE_BVECS:
return osd_data->bvec_pos.iter.bi_size;
+ case CEPH_OSD_DATA_TYPE_ITER:
+ return iov_iter_count(&osd_data->iter);
default:
WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
return 0;
@@ -376,8 +401,10 @@ static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
switch (op->op) {
case CEPH_OSD_OP_READ:
+ case CEPH_OSD_OP_SPARSE_READ:
case CEPH_OSD_OP_WRITE:
case CEPH_OSD_OP_WRITEFULL:
+ kfree(op->extent.sparse_ext);
ceph_osd_data_release(&op->extent.osd_data);
break;
case CEPH_OSD_OP_CALL:
@@ -669,6 +696,7 @@ static void get_num_data_items(struct ceph_osd_request *req,
/* reply */
case CEPH_OSD_OP_STAT:
case CEPH_OSD_OP_READ:
+ case CEPH_OSD_OP_SPARSE_READ:
case CEPH_OSD_OP_LIST_WATCHERS:
*num_reply_data_items += 1;
break;
@@ -738,7 +766,7 @@ void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
opcode != CEPH_OSD_OP_WRITEFULL && opcode != CEPH_OSD_OP_ZERO &&
- opcode != CEPH_OSD_OP_TRUNCATE);
+ opcode != CEPH_OSD_OP_TRUNCATE && opcode != CEPH_OSD_OP_SPARSE_READ);
op->extent.offset = offset;
op->extent.length = length;
@@ -951,6 +979,8 @@ static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
#endif
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BVECS) {
ceph_msg_data_add_bvecs(msg, &osd_data->bvec_pos);
+ } else if (osd_data->type == CEPH_OSD_DATA_TYPE_ITER) {
+ ceph_msg_data_add_iter(msg, &osd_data->iter);
} else {
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
}
@@ -963,6 +993,7 @@ static u32 osd_req_encode_op(struct ceph_osd_op *dst,
case CEPH_OSD_OP_STAT:
break;
case CEPH_OSD_OP_READ:
+ case CEPH_OSD_OP_SPARSE_READ:
case CEPH_OSD_OP_WRITE:
case CEPH_OSD_OP_WRITEFULL:
case CEPH_OSD_OP_ZERO:
@@ -1017,6 +1048,10 @@ static u32 osd_req_encode_op(struct ceph_osd_op *dst,
dst->copy_from.src_fadvise_flags =
cpu_to_le32(src->copy_from.src_fadvise_flags);
break;
+ case CEPH_OSD_OP_ASSERT_VER:
+ dst->assert_ver.unused = cpu_to_le64(0);
+ dst->assert_ver.ver = cpu_to_le64(src->assert_ver.ver);
+ break;
default:
pr_err("unsupported osd opcode %s\n",
ceph_osd_op_name(src->op));
@@ -1059,7 +1094,8 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
opcode != CEPH_OSD_OP_ZERO && opcode != CEPH_OSD_OP_TRUNCATE &&
- opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE);
+ opcode != CEPH_OSD_OP_CREATE && opcode != CEPH_OSD_OP_DELETE &&
+ opcode != CEPH_OSD_OP_SPARSE_READ);
req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
GFP_NOFS);
@@ -1100,15 +1136,30 @@ struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
if (flags & CEPH_OSD_FLAG_WRITE)
req->r_data_offset = off;
- if (num_ops > 1)
+ if (num_ops > 1) {
+ int num_req_ops, num_rep_ops;
+
/*
- * This is a special case for ceph_writepages_start(), but it
- * also covers ceph_uninline_data(). If more multi-op request
- * use cases emerge, we will need a separate helper.
+ * If this is a multi-op write request, assume that we'll need
+ * request ops. If it's a multi-op read then assume we'll need
+ * reply ops. Anything else and call it -EINVAL.
*/
- r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_ops, 0);
- else
+ if (flags & CEPH_OSD_FLAG_WRITE) {
+ num_req_ops = num_ops;
+ num_rep_ops = 0;
+ } else if (flags & CEPH_OSD_FLAG_READ) {
+ num_req_ops = 0;
+ num_rep_ops = num_ops;
+ } else {
+ r = -EINVAL;
+ goto fail;
+ }
+
+ r = __ceph_osdc_alloc_messages(req, GFP_NOFS, num_req_ops,
+ num_rep_ops);
+ } else {
r = ceph_osdc_alloc_messages(req, GFP_NOFS);
+ }
if (r)
goto fail;
@@ -1120,6 +1171,18 @@ fail:
}
EXPORT_SYMBOL(ceph_osdc_new_request);
+int __ceph_alloc_sparse_ext_map(struct ceph_osd_req_op *op, int cnt)
+{
+ op->extent.sparse_ext_cnt = cnt;
+ op->extent.sparse_ext = kmalloc_array(cnt,
+ sizeof(*op->extent.sparse_ext),
+ GFP_NOFS);
+ if (!op->extent.sparse_ext)
+ return -ENOMEM;
+ return 0;
+}
+EXPORT_SYMBOL(__ceph_alloc_sparse_ext_map);
+
/*
* We keep osd requests in an rbtree, sorted by ->r_tid.
*/
@@ -1177,6 +1240,7 @@ static void osd_init(struct ceph_osd *osd)
{
refcount_set(&osd->o_ref, 1);
RB_CLEAR_NODE(&osd->o_node);
+ spin_lock_init(&osd->o_requests_lock);
osd->o_requests = RB_ROOT;
osd->o_linger_requests = RB_ROOT;
osd->o_backoff_mappings = RB_ROOT;
@@ -1187,6 +1251,13 @@ static void osd_init(struct ceph_osd *osd)
mutex_init(&osd->lock);
}
+static void ceph_init_sparse_read(struct ceph_sparse_read *sr)
+{
+ kfree(sr->sr_extent);
+ memset(sr, '\0', sizeof(*sr));
+ sr->sr_state = CEPH_SPARSE_READ_HDR;
+}
+
static void osd_cleanup(struct ceph_osd *osd)
{
WARN_ON(!RB_EMPTY_NODE(&osd->o_node));
@@ -1197,6 +1268,8 @@ static void osd_cleanup(struct ceph_osd *osd)
WARN_ON(!list_empty(&osd->o_osd_lru));
WARN_ON(!list_empty(&osd->o_keepalive_item));
+ ceph_init_sparse_read(&osd->o_sparse_read);
+
if (osd->o_auth.authorizer) {
WARN_ON(osd_homeless(osd));
ceph_auth_destroy_authorizer(osd->o_auth.authorizer);
@@ -1216,6 +1289,9 @@ static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
osd_init(osd);
osd->o_osdc = osdc;
osd->o_osd = onum;
+ osd->o_sparse_op_idx = -1;
+
+ ceph_init_sparse_read(&osd->o_sparse_read);
ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
@@ -1406,7 +1482,9 @@ static void link_request(struct ceph_osd *osd, struct ceph_osd_request *req)
atomic_inc(&osd->o_osdc->num_homeless);
get_osd(osd);
+ spin_lock(&osd->o_requests_lock);
insert_request(&osd->o_requests, req);
+ spin_unlock(&osd->o_requests_lock);
req->r_osd = osd;
}
@@ -1418,7 +1496,9 @@ static void unlink_request(struct ceph_osd *osd, struct ceph_osd_request *req)
req, req->r_tid);
req->r_osd = NULL;
+ spin_lock(&osd->o_requests_lock);
erase_request(&osd->o_requests, req);
+ spin_unlock(&osd->o_requests_lock);
put_osd(osd);
if (!osd_homeless(osd))
@@ -2016,6 +2096,7 @@ static void setup_request_data(struct ceph_osd_request *req)
&op->raw_data_in);
break;
case CEPH_OSD_OP_READ:
+ case CEPH_OSD_OP_SPARSE_READ:
ceph_osdc_msg_data_add(reply_msg,
&op->extent.osd_data);
break;
@@ -2435,8 +2516,10 @@ static void finish_request(struct ceph_osd_request *req)
req->r_end_latency = ktime_get();
- if (req->r_osd)
+ if (req->r_osd) {
+ ceph_init_sparse_read(&req->r_osd->o_sparse_read);
unlink_request(req->r_osd, req);
+ }
atomic_dec(&osdc->num_requests);
/*
@@ -3795,6 +3878,7 @@ static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
* one (type of) reply back.
*/
WARN_ON(!(m.flags & CEPH_OSD_FLAG_ONDISK));
+ req->r_version = m.user_version;
req->r_result = m.result ?: data_len;
finish_request(req);
mutex_unlock(&osd->lock);
@@ -5348,6 +5432,24 @@ static void osd_dispatch(struct ceph_connection *con, struct ceph_msg *msg)
ceph_msg_put(msg);
}
+/* How much sparse data was requested? */
+static u64 sparse_data_requested(struct ceph_osd_request *req)
+{
+ u64 len = 0;
+
+ if (req->r_flags & CEPH_OSD_FLAG_READ) {
+ int i;
+
+ for (i = 0; i < req->r_num_ops; ++i) {
+ struct ceph_osd_req_op *op = &req->r_ops[i];
+
+ if (op->op == CEPH_OSD_OP_SPARSE_READ)
+ len += op->extent.length;
+ }
+ }
+ return len;
+}
+
/*
* Lookup and return message for incoming reply. Don't try to do
* anything about a larger than preallocated data portion of the
@@ -5364,6 +5466,7 @@ static struct ceph_msg *get_reply(struct ceph_connection *con,
int front_len = le32_to_cpu(hdr->front_len);
int data_len = le32_to_cpu(hdr->data_len);
u64 tid = le64_to_cpu(hdr->tid);
+ u64 srlen;
down_read(&osdc->lock);
if (!osd_registered(osd)) {
@@ -5396,7 +5499,8 @@ static struct ceph_msg *get_reply(struct ceph_connection *con,
req->r_reply = m;
}
- if (data_len > req->r_reply->data_length) {
+ srlen = sparse_data_requested(req);
+ if (!srlen && data_len > req->r_reply->data_length) {
pr_warn("%s osd%d tid %llu data %d > preallocated %zu, skipping\n",
__func__, osd->o_osd, req->r_tid, data_len,
req->r_reply->data_length);
@@ -5406,6 +5510,8 @@ static struct ceph_msg *get_reply(struct ceph_connection *con,
}
m = ceph_msg_get(req->r_reply);
+ m->sparse_read = (bool)srlen;
+
dout("get_reply tid %lld %p\n", tid, m);
out_unlock_session:
@@ -5638,9 +5744,217 @@ static int osd_check_message_signature(struct ceph_msg *msg)
return ceph_auth_check_message_signature(auth, msg);
}
+static void advance_cursor(struct ceph_msg_data_cursor *cursor, size_t len,
+ bool zero)
+{
+ while (len) {
+ struct page *page;
+ size_t poff, plen;
+
+ page = ceph_msg_data_next(cursor, &poff, &plen);
+ if (plen > len)
+ plen = len;
+ if (zero)
+ zero_user_segment(page, poff, poff + plen);
+ len -= plen;
+ ceph_msg_data_advance(cursor, plen);
+ }
+}
+
+static int prep_next_sparse_read(struct ceph_connection *con,
+ struct ceph_msg_data_cursor *cursor)
+{
+ struct ceph_osd *o = con->private;
+ struct ceph_sparse_read *sr = &o->o_sparse_read;
+ struct ceph_osd_request *req;
+ struct ceph_osd_req_op *op;
+
+ spin_lock(&o->o_requests_lock);
+ req = lookup_request(&o->o_requests, le64_to_cpu(con->in_msg->hdr.tid));
+ if (!req) {
+ spin_unlock(&o->o_requests_lock);
+ return -EBADR;
+ }
+
+ if (o->o_sparse_op_idx < 0) {
+ u64 srlen = sparse_data_requested(req);
+
+ dout("%s: [%d] starting new sparse read req. srlen=0x%llx\n",
+ __func__, o->o_osd, srlen);
+ ceph_msg_data_cursor_init(cursor, con->in_msg, srlen);
+ } else {
+ u64 end;
+
+ op = &req->r_ops[o->o_sparse_op_idx];
+
+ WARN_ON_ONCE(op->extent.sparse_ext);
+
+ /* hand back buffer we took earlier */
+ op->extent.sparse_ext = sr->sr_extent;
+ sr->sr_extent = NULL;
+ op->extent.sparse_ext_cnt = sr->sr_count;
+ sr->sr_ext_len = 0;
+ dout("%s: [%d] completed extent array len %d cursor->resid %zd\n",
+ __func__, o->o_osd, op->extent.sparse_ext_cnt, cursor->resid);
+ /* Advance to end of data for this operation */
+ end = ceph_sparse_ext_map_end(op);
+ if (end < sr->sr_req_len)
+ advance_cursor(cursor, sr->sr_req_len - end, false);
+ }
+
+ ceph_init_sparse_read(sr);
+
+ /* find next op in this request (if any) */
+ while (++o->o_sparse_op_idx < req->r_num_ops) {
+ op = &req->r_ops[o->o_sparse_op_idx];
+ if (op->op == CEPH_OSD_OP_SPARSE_READ)
+ goto found;
+ }
+
+ /* reset for next sparse read request */
+ spin_unlock(&o->o_requests_lock);
+ o->o_sparse_op_idx = -1;
+ return 0;
+found:
+ sr->sr_req_off = op->extent.offset;
+ sr->sr_req_len = op->extent.length;
+ sr->sr_pos = sr->sr_req_off;
+ dout("%s: [%d] new sparse read op at idx %d 0x%llx~0x%llx\n", __func__,
+ o->o_osd, o->o_sparse_op_idx, sr->sr_req_off, sr->sr_req_len);
+
+ /* hand off request's sparse extent map buffer */
+ sr->sr_ext_len = op->extent.sparse_ext_cnt;
+ op->extent.sparse_ext_cnt = 0;
+ sr->sr_extent = op->extent.sparse_ext;
+ op->extent.sparse_ext = NULL;
+
+ spin_unlock(&o->o_requests_lock);
+ return 1;
+}
+
+#ifdef __BIG_ENDIAN
+static inline void convert_extent_map(struct ceph_sparse_read *sr)
+{
+ int i;
+
+ for (i = 0; i < sr->sr_count; i++) {
+ struct ceph_sparse_extent *ext = &sr->sr_extent[i];
+
+ ext->off = le64_to_cpu((__force __le64)ext->off);
+ ext->len = le64_to_cpu((__force __le64)ext->len);
+ }
+}
+#else
+static inline void convert_extent_map(struct ceph_sparse_read *sr)
+{
+}
+#endif
+
+#define MAX_EXTENTS 4096
+
+static int osd_sparse_read(struct ceph_connection *con,
+ struct ceph_msg_data_cursor *cursor,
+ char **pbuf)
+{
+ struct ceph_osd *o = con->private;
+ struct ceph_sparse_read *sr = &o->o_sparse_read;
+ u32 count = sr->sr_count;
+ u64 eoff, elen;
+ int ret;
+
+ switch (sr->sr_state) {
+ case CEPH_SPARSE_READ_HDR:
+next_op:
+ ret = prep_next_sparse_read(con, cursor);
+ if (ret <= 0)
+ return ret;
+
+ /* number of extents */
+ ret = sizeof(sr->sr_count);
+ *pbuf = (char *)&sr->sr_count;
+ sr->sr_state = CEPH_SPARSE_READ_EXTENTS;
+ break;
+ case CEPH_SPARSE_READ_EXTENTS:
+ /* Convert sr_count to host-endian */
+ count = le32_to_cpu((__force __le32)sr->sr_count);
+ sr->sr_count = count;
+ dout("[%d] got %u extents\n", o->o_osd, count);
+
+ if (count > 0) {
+ if (!sr->sr_extent || count > sr->sr_ext_len) {
+ /*
+ * Apply a hard cap to the number of extents.
+ * If we have more, assume something is wrong.
+ */
+ if (count > MAX_EXTENTS) {
+ dout("%s: OSD returned 0x%x extents in a single reply!\n",
+ __func__, count);
+ return -EREMOTEIO;
+ }
+
+ /* no extent array provided, or too short */
+ kfree(sr->sr_extent);
+ sr->sr_extent = kmalloc_array(count,
+ sizeof(*sr->sr_extent),
+ GFP_NOIO);
+ if (!sr->sr_extent)
+ return -ENOMEM;
+ sr->sr_ext_len = count;
+ }
+ ret = count * sizeof(*sr->sr_extent);
+ *pbuf = (char *)sr->sr_extent;
+ sr->sr_state = CEPH_SPARSE_READ_DATA_LEN;
+ break;
+ }
+ /* No extents? Read data len */
+ fallthrough;
+ case CEPH_SPARSE_READ_DATA_LEN:
+ convert_extent_map(sr);
+ ret = sizeof(sr->sr_datalen);
+ *pbuf = (char *)&sr->sr_datalen;
+ sr->sr_state = CEPH_SPARSE_READ_DATA;
+ break;
+ case CEPH_SPARSE_READ_DATA:
+ if (sr->sr_index >= count) {
+ sr->sr_state = CEPH_SPARSE_READ_HDR;
+ goto next_op;
+ }
+
+ eoff = sr->sr_extent[sr->sr_index].off;
+ elen = sr->sr_extent[sr->sr_index].len;
+
+ dout("[%d] ext %d off 0x%llx len 0x%llx\n",
+ o->o_osd, sr->sr_index, eoff, elen);
+
+ if (elen > INT_MAX) {
+ dout("Sparse read extent length too long (0x%llx)\n",
+ elen);
+ return -EREMOTEIO;
+ }
+
+ /* zero out anything from sr_pos to start of extent */
+ if (sr->sr_pos < eoff)
+ advance_cursor(cursor, eoff - sr->sr_pos, true);
+
+ /* Set position to end of extent */
+ sr->sr_pos = eoff + elen;
+
+ /* send back the new length and nullify the ptr */
+ cursor->sr_resid = elen;
+ ret = elen;
+ *pbuf = NULL;
+
+ /* Bump the array index */
+ ++sr->sr_index;
+ break;
+ }
+ return ret;
+}
+
static const struct ceph_connection_operations osd_con_ops = {
.get = osd_get_con,
.put = osd_put_con,
+ .sparse_read = osd_sparse_read,
.alloc_msg = osd_alloc_msg,
.dispatch = osd_dispatch,
.fault = osd_fault,
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-15 04:50:42 +0300