zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/net/ceph/osd_client.c b/ap/os/linux/linux-3.4.x/net/ceph/osd_client.c
new file mode 100644
index 0000000..835d81b
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/ceph/osd_client.c
@@ -0,0 +1,2195 @@
+#include <linux/ceph/ceph_debug.h>
+
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/highmem.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#ifdef CONFIG_BLOCK
+#include <linux/bio.h>
+#endif
+
+#include <linux/ceph/libceph.h>
+#include <linux/ceph/osd_client.h>
+#include <linux/ceph/messenger.h>
+#include <linux/ceph/decode.h>
+#include <linux/ceph/auth.h>
+#include <linux/ceph/pagelist.h>
+
+#define OSD_OP_FRONT_LEN 4096
+#define OSD_OPREPLY_FRONT_LEN 512
+
+static const struct ceph_connection_operations osd_con_ops;
+
+static void send_queued(struct ceph_osd_client *osdc);
+static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
+static void __register_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req);
+static void __unregister_linger_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req);
+static void __send_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req);
+
+static int op_needs_trail(int op)
+{
+ switch (op) {
+ case CEPH_OSD_OP_GETXATTR:
+ case CEPH_OSD_OP_SETXATTR:
+ case CEPH_OSD_OP_CMPXATTR:
+ case CEPH_OSD_OP_CALL:
+ case CEPH_OSD_OP_NOTIFY:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+static int op_has_extent(int op)
+{
+ return (op == CEPH_OSD_OP_READ ||
+ op == CEPH_OSD_OP_WRITE);
+}
+
+int ceph_calc_raw_layout(struct ceph_osd_client *osdc,
+ struct ceph_file_layout *layout,
+ u64 snapid,
+ u64 off, u64 *plen, u64 *bno,
+ struct ceph_osd_request *req,
+ struct ceph_osd_req_op *op)
+{
+ struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
+ u64 orig_len = *plen;
+ u64 objoff, objlen; /* extent in object */
+ int r;
+
+ reqhead->snapid = cpu_to_le64(snapid);
+
+ /* object extent? */
+ r = ceph_calc_file_object_mapping(layout, off, plen, bno,
+ &objoff, &objlen);
+ if (r < 0)
+ return r;
+ if (*plen < orig_len)
+ dout(" skipping last %llu, final file extent %llu~%llu\n",
+ orig_len - *plen, off, *plen);
+
+ if (op_has_extent(op->op)) {
+ op->extent.offset = objoff;
+ op->extent.length = objlen;
+ }
+ req->r_num_pages = calc_pages_for(off, *plen);
+ req->r_page_alignment = off & ~PAGE_MASK;
+ if (op->op == CEPH_OSD_OP_WRITE)
+ op->payload_len = *plen;
+
+ dout("calc_layout bno=%llx %llu~%llu (%d pages)\n",
+ *bno, objoff, objlen, req->r_num_pages);
+ return 0;
+}
+EXPORT_SYMBOL(ceph_calc_raw_layout);
+
+/*
+ * Implement client access to distributed object storage cluster.
+ *
+ * All data objects are stored within a cluster/cloud of OSDs, or
+ * "object storage devices." (Note that Ceph OSDs have _nothing_ to
+ * do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
+ * remote daemons serving up and coordinating consistent and safe
+ * access to storage.
+ *
+ * Cluster membership and the mapping of data objects onto storage devices
+ * are described by the osd map.
+ *
+ * We keep track of pending OSD requests (read, write), resubmit
+ * requests to different OSDs when the cluster topology/data layout
+ * change, or retry the affected requests when the communications
+ * channel with an OSD is reset.
+ */
+
+/*
+ * calculate the mapping of a file extent onto an object, and fill out the
+ * request accordingly. shorten extent as necessary if it crosses an
+ * object boundary.
+ *
+ * fill osd op in request message.
+ */
+static int calc_layout(struct ceph_osd_client *osdc,
+ struct ceph_vino vino,
+ struct ceph_file_layout *layout,
+ u64 off, u64 *plen,
+ struct ceph_osd_request *req,
+ struct ceph_osd_req_op *op)
+{
+ u64 bno;
+ int r;
+
+ r = ceph_calc_raw_layout(osdc, layout, vino.snap, off,
+ plen, &bno, req, op);
+ if (r < 0)
+ return r;
+
+ snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx", vino.ino, bno);
+ req->r_oid_len = strlen(req->r_oid);
+
+ return r;
+}
+
+/*
+ * requests
+ */
+void ceph_osdc_release_request(struct kref *kref)
+{
+ struct ceph_osd_request *req = container_of(kref,
+ struct ceph_osd_request,
+ r_kref);
+
+ if (req->r_request)
+ ceph_msg_put(req->r_request);
+ if (req->r_con_filling_msg) {
+ dout("%s revoking pages %p from con %p\n", __func__,
+ req->r_pages, req->r_con_filling_msg);
+ ceph_msg_revoke_incoming(req->r_reply);
+ req->r_con_filling_msg->ops->put(req->r_con_filling_msg);
+ }
+ if (req->r_reply)
+ ceph_msg_put(req->r_reply);
+ if (req->r_own_pages)
+ ceph_release_page_vector(req->r_pages,
+ req->r_num_pages);
+#ifdef CONFIG_BLOCK
+ if (req->r_bio)
+ bio_put(req->r_bio);
+#endif
+ ceph_put_snap_context(req->r_snapc);
+ if (req->r_trail) {
+ ceph_pagelist_release(req->r_trail);
+ kfree(req->r_trail);
+ }
+ if (req->r_mempool)
+ mempool_free(req, req->r_osdc->req_mempool);
+ else
+ kfree(req);
+}
+EXPORT_SYMBOL(ceph_osdc_release_request);
+
+static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail)
+{
+ int i = 0;
+
+ if (needs_trail)
+ *needs_trail = 0;
+ while (ops[i].op) {
+ if (needs_trail && op_needs_trail(ops[i].op))
+ *needs_trail = 1;
+ i++;
+ }
+
+ return i;
+}
+
+struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
+ int flags,
+ struct ceph_snap_context *snapc,
+ struct ceph_osd_req_op *ops,
+ bool use_mempool,
+ gfp_t gfp_flags,
+ struct page **pages,
+ struct bio *bio)
+{
+ struct ceph_osd_request *req;
+ struct ceph_msg *msg;
+ int needs_trail;
+ int num_op = get_num_ops(ops, &needs_trail);
+ size_t msg_size = sizeof(struct ceph_osd_request_head);
+
+ msg_size += num_op*sizeof(struct ceph_osd_op);
+
+ if (use_mempool) {
+ req = mempool_alloc(osdc->req_mempool, gfp_flags);
+ memset(req, 0, sizeof(*req));
+ } else {
+ req = kzalloc(sizeof(*req), gfp_flags);
+ }
+ if (req == NULL)
+ return NULL;
+
+ req->r_osdc = osdc;
+ req->r_mempool = use_mempool;
+
+ kref_init(&req->r_kref);
+ init_completion(&req->r_completion);
+ init_completion(&req->r_safe_completion);
+ RB_CLEAR_NODE(&req->r_node);
+ INIT_LIST_HEAD(&req->r_unsafe_item);
+ INIT_LIST_HEAD(&req->r_linger_item);
+ INIT_LIST_HEAD(&req->r_linger_osd);
+ INIT_LIST_HEAD(&req->r_req_lru_item);
+ req->r_flags = flags;
+
+ WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0);
+
+ /* create reply message */
+ if (use_mempool)
+ msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
+ else
+ msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
+ OSD_OPREPLY_FRONT_LEN, gfp_flags, true);
+ if (!msg) {
+ ceph_osdc_put_request(req);
+ return NULL;
+ }
+ req->r_reply = msg;
+
+ /* allocate space for the trailing data */
+ if (needs_trail) {
+ req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags);
+ if (!req->r_trail) {
+ ceph_osdc_put_request(req);
+ return NULL;
+ }
+ ceph_pagelist_init(req->r_trail);
+ }
+
+ /* create request message; allow space for oid */
+ msg_size += MAX_OBJ_NAME_SIZE;
+ if (snapc)
+ msg_size += sizeof(u64) * snapc->num_snaps;
+ if (use_mempool)
+ msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
+ else
+ msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags, true);
+ if (!msg) {
+ ceph_osdc_put_request(req);
+ return NULL;
+ }
+
+ memset(msg->front.iov_base, 0, msg->front.iov_len);
+
+ req->r_request = msg;
+ req->r_pages = pages;
+#ifdef CONFIG_BLOCK
+ if (bio) {
+ req->r_bio = bio;
+ bio_get(req->r_bio);
+ }
+#endif
+
+ return req;
+}
+EXPORT_SYMBOL(ceph_osdc_alloc_request);
+
+static void osd_req_encode_op(struct ceph_osd_request *req,
+ struct ceph_osd_op *dst,
+ struct ceph_osd_req_op *src)
+{
+ dst->op = cpu_to_le16(src->op);
+
+ switch (src->op) {
+ case CEPH_OSD_OP_READ:
+ case CEPH_OSD_OP_WRITE:
+ dst->extent.offset =
+ cpu_to_le64(src->extent.offset);
+ dst->extent.length =
+ cpu_to_le64(src->extent.length);
+ dst->extent.truncate_size =
+ cpu_to_le64(src->extent.truncate_size);
+ dst->extent.truncate_seq =
+ cpu_to_le32(src->extent.truncate_seq);
+ break;
+
+ case CEPH_OSD_OP_GETXATTR:
+ case CEPH_OSD_OP_SETXATTR:
+ case CEPH_OSD_OP_CMPXATTR:
+ BUG_ON(!req->r_trail);
+
+ dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
+ dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
+ dst->xattr.cmp_op = src->xattr.cmp_op;
+ dst->xattr.cmp_mode = src->xattr.cmp_mode;
+ ceph_pagelist_append(req->r_trail, src->xattr.name,
+ src->xattr.name_len);
+ ceph_pagelist_append(req->r_trail, src->xattr.val,
+ src->xattr.value_len);
+ break;
+ case CEPH_OSD_OP_CALL:
+ BUG_ON(!req->r_trail);
+
+ dst->cls.class_len = src->cls.class_len;
+ dst->cls.method_len = src->cls.method_len;
+ dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
+
+ ceph_pagelist_append(req->r_trail, src->cls.class_name,
+ src->cls.class_len);
+ ceph_pagelist_append(req->r_trail, src->cls.method_name,
+ src->cls.method_len);
+ ceph_pagelist_append(req->r_trail, src->cls.indata,
+ src->cls.indata_len);
+ break;
+ case CEPH_OSD_OP_ROLLBACK:
+ dst->snap.snapid = cpu_to_le64(src->snap.snapid);
+ break;
+ case CEPH_OSD_OP_STARTSYNC:
+ break;
+ case CEPH_OSD_OP_NOTIFY:
+ {
+ __le32 prot_ver = cpu_to_le32(src->watch.prot_ver);
+ __le32 timeout = cpu_to_le32(src->watch.timeout);
+
+ BUG_ON(!req->r_trail);
+
+ ceph_pagelist_append(req->r_trail,
+ &prot_ver, sizeof(prot_ver));
+ ceph_pagelist_append(req->r_trail,
+ &timeout, sizeof(timeout));
+ }
+ case CEPH_OSD_OP_NOTIFY_ACK:
+ case CEPH_OSD_OP_WATCH:
+ dst->watch.cookie = cpu_to_le64(src->watch.cookie);
+ dst->watch.ver = cpu_to_le64(src->watch.ver);
+ dst->watch.flag = src->watch.flag;
+ break;
+ default:
+ pr_err("unrecognized osd opcode %d\n", dst->op);
+ WARN_ON(1);
+ break;
+ }
+ dst->payload_len = cpu_to_le32(src->payload_len);
+}
+
+/*
+ * build new request AND message
+ *
+ */
+void ceph_osdc_build_request(struct ceph_osd_request *req,
+ u64 off, u64 *plen,
+ struct ceph_osd_req_op *src_ops,
+ struct ceph_snap_context *snapc,
+ struct timespec *mtime,
+ const char *oid,
+ int oid_len)
+{
+ struct ceph_msg *msg = req->r_request;
+ struct ceph_osd_request_head *head;
+ struct ceph_osd_req_op *src_op;
+ struct ceph_osd_op *op;
+ void *p;
+ int num_op = get_num_ops(src_ops, NULL);
+ size_t msg_size = sizeof(*head) + num_op*sizeof(*op);
+ int flags = req->r_flags;
+ u64 data_len = 0;
+ int i;
+
+ head = msg->front.iov_base;
+ op = (void *)(head + 1);
+ p = (void *)(op + num_op);
+
+ req->r_snapc = ceph_get_snap_context(snapc);
+
+ head->client_inc = cpu_to_le32(1); /* always, for now. */
+ head->flags = cpu_to_le32(flags);
+ if (flags & CEPH_OSD_FLAG_WRITE)
+ ceph_encode_timespec(&head->mtime, mtime);
+ head->num_ops = cpu_to_le16(num_op);
+
+
+ /* fill in oid */
+ head->object_len = cpu_to_le32(oid_len);
+ memcpy(p, oid, oid_len);
+ p += oid_len;
+
+ src_op = src_ops;
+ while (src_op->op) {
+ osd_req_encode_op(req, op, src_op);
+ src_op++;
+ op++;
+ }
+
+ if (req->r_trail)
+ data_len += req->r_trail->length;
+
+ if (snapc) {
+ head->snap_seq = cpu_to_le64(snapc->seq);
+ head->num_snaps = cpu_to_le32(snapc->num_snaps);
+ for (i = 0; i < snapc->num_snaps; i++) {
+ put_unaligned_le64(snapc->snaps[i], p);
+ p += sizeof(u64);
+ }
+ }
+
+ if (flags & CEPH_OSD_FLAG_WRITE) {
+ req->r_request->hdr.data_off = cpu_to_le16(off);
+ req->r_request->hdr.data_len = cpu_to_le32(*plen + data_len);
+ } else if (data_len) {
+ req->r_request->hdr.data_off = 0;
+ req->r_request->hdr.data_len = cpu_to_le32(data_len);
+ }
+
+ req->r_request->page_alignment = req->r_page_alignment;
+
+ BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
+ msg_size = p - msg->front.iov_base;
+ msg->front.iov_len = msg_size;
+ msg->hdr.front_len = cpu_to_le32(msg_size);
+ return;
+}
+EXPORT_SYMBOL(ceph_osdc_build_request);
+
+/*
+ * build new request AND message, calculate layout, and adjust file
+ * extent as needed.
+ *
+ * if the file was recently truncated, we include information about its
+ * old and new size so that the object can be updated appropriately. (we
+ * avoid synchronously deleting truncated objects because it's slow.)
+ *
+ * if @do_sync, include a 'startsync' command so that the osd will flush
+ * data quickly.
+ */
+struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
+ struct ceph_file_layout *layout,
+ struct ceph_vino vino,
+ u64 off, u64 *plen,
+ int opcode, int flags,
+ struct ceph_snap_context *snapc,
+ int do_sync,
+ u32 truncate_seq,
+ u64 truncate_size,
+ struct timespec *mtime,
+ bool use_mempool, int num_reply,
+ int page_align)
+{
+ struct ceph_osd_req_op ops[3];
+ struct ceph_osd_request *req;
+ int r;
+
+ ops[0].op = opcode;
+ ops[0].extent.truncate_seq = truncate_seq;
+ ops[0].extent.truncate_size = truncate_size;
+ ops[0].payload_len = 0;
+
+ if (do_sync) {
+ ops[1].op = CEPH_OSD_OP_STARTSYNC;
+ ops[1].payload_len = 0;
+ ops[2].op = 0;
+ } else
+ ops[1].op = 0;
+
+ req = ceph_osdc_alloc_request(osdc, flags,
+ snapc, ops,
+ use_mempool,
+ GFP_NOFS, NULL, NULL);
+ if (!req)
+ return ERR_PTR(-ENOMEM);
+
+ /* calculate max write size */
+ r = calc_layout(osdc, vino, layout, off, plen, req, ops);
+ if (r < 0)
+ return ERR_PTR(r);
+ req->r_file_layout = *layout; /* keep a copy */
+
+ /* in case it differs from natural (file) alignment that
+ calc_layout filled in for us */
+ req->r_num_pages = calc_pages_for(page_align, *plen);
+ req->r_page_alignment = page_align;
+
+ ceph_osdc_build_request(req, off, plen, ops,
+ snapc,
+ mtime,
+ req->r_oid, req->r_oid_len);
+
+ return req;
+}
+EXPORT_SYMBOL(ceph_osdc_new_request);
+
+/*
+ * We keep osd requests in an rbtree, sorted by ->r_tid.
+ */
+static void __insert_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *new)
+{
+ struct rb_node **p = &osdc->requests.rb_node;
+ struct rb_node *parent = NULL;
+ struct ceph_osd_request *req = NULL;
+
+ while (*p) {
+ parent = *p;
+ req = rb_entry(parent, struct ceph_osd_request, r_node);
+ if (new->r_tid < req->r_tid)
+ p = &(*p)->rb_left;
+ else if (new->r_tid > req->r_tid)
+ p = &(*p)->rb_right;
+ else
+ BUG();
+ }
+
+ rb_link_node(&new->r_node, parent, p);
+ rb_insert_color(&new->r_node, &osdc->requests);
+}
+
+static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
+ u64 tid)
+{
+ struct ceph_osd_request *req;
+ struct rb_node *n = osdc->requests.rb_node;
+
+ while (n) {
+ req = rb_entry(n, struct ceph_osd_request, r_node);
+ if (tid < req->r_tid)
+ n = n->rb_left;
+ else if (tid > req->r_tid)
+ n = n->rb_right;
+ else
+ return req;
+ }
+ return NULL;
+}
+
+static struct ceph_osd_request *
+__lookup_request_ge(struct ceph_osd_client *osdc,
+ u64 tid)
+{
+ struct ceph_osd_request *req;
+ struct rb_node *n = osdc->requests.rb_node;
+
+ while (n) {
+ req = rb_entry(n, struct ceph_osd_request, r_node);
+ if (tid < req->r_tid) {
+ if (!n->rb_left)
+ return req;
+ n = n->rb_left;
+ } else if (tid > req->r_tid) {
+ n = n->rb_right;
+ } else {
+ return req;
+ }
+ }
+ return NULL;
+}
+
+/*
+ * Resubmit requests pending on the given osd.
+ */
+static void __kick_osd_requests(struct ceph_osd_client *osdc,
+ struct ceph_osd *osd)
+{
+ struct ceph_osd_request *req, *nreq;
+ int err;
+
+ dout("__kick_osd_requests osd%d\n", osd->o_osd);
+ err = __reset_osd(osdc, osd);
+ if (err)
+ return;
+
+ list_for_each_entry(req, &osd->o_requests, r_osd_item) {
+ list_move(&req->r_req_lru_item, &osdc->req_unsent);
+ dout("requeued %p tid %llu osd%d\n", req, req->r_tid,
+ osd->o_osd);
+ if (!req->r_linger)
+ req->r_flags |= CEPH_OSD_FLAG_RETRY;
+ }
+
+ list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
+ r_linger_osd) {
+ /*
+ * reregister request prior to unregistering linger so
+ * that r_osd is preserved.
+ */
+ BUG_ON(!list_empty(&req->r_req_lru_item));
+ __register_request(osdc, req);
+ list_add(&req->r_req_lru_item, &osdc->req_unsent);
+ list_add(&req->r_osd_item, &req->r_osd->o_requests);
+ __unregister_linger_request(osdc, req);
+ dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
+ osd->o_osd);
+ }
+}
+
+/*
+ * If the osd connection drops, we need to resubmit all requests.
+ */
+static void osd_reset(struct ceph_connection *con)
+{
+ struct ceph_osd *osd = con->private;
+ struct ceph_osd_client *osdc;
+
+ if (!osd)
+ return;
+ dout("osd_reset osd%d\n", osd->o_osd);
+ osdc = osd->o_osdc;
+ down_read(&osdc->map_sem);
+ mutex_lock(&osdc->request_mutex);
+ __kick_osd_requests(osdc, osd);
+ mutex_unlock(&osdc->request_mutex);
+ send_queued(osdc);
+ up_read(&osdc->map_sem);
+}
+
+/*
+ * Track open sessions with osds.
+ */
+static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
+{
+ struct ceph_osd *osd;
+
+ osd = kzalloc(sizeof(*osd), GFP_NOFS);
+ if (!osd)
+ return NULL;
+
+ atomic_set(&osd->o_ref, 1);
+ osd->o_osdc = osdc;
+ osd->o_osd = onum;
+ RB_CLEAR_NODE(&osd->o_node);
+ INIT_LIST_HEAD(&osd->o_requests);
+ INIT_LIST_HEAD(&osd->o_linger_requests);
+ INIT_LIST_HEAD(&osd->o_osd_lru);
+ osd->o_incarnation = 1;
+
+ ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
+
+ INIT_LIST_HEAD(&osd->o_keepalive_item);
+ return osd;
+}
+
+static struct ceph_osd *get_osd(struct ceph_osd *osd)
+{
+ if (atomic_inc_not_zero(&osd->o_ref)) {
+ dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
+ atomic_read(&osd->o_ref));
+ return osd;
+ } else {
+ dout("get_osd %p FAIL\n", osd);
+ return NULL;
+ }
+}
+
+static void put_osd(struct ceph_osd *osd)
+{
+ dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
+ atomic_read(&osd->o_ref) - 1);
+ if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
+ struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
+
+ ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
+ kfree(osd);
+ }
+}
+
+/*
+ * remove an osd from our map
+ */
+static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
+{
+ dout("__remove_osd %p\n", osd);
+ BUG_ON(!list_empty(&osd->o_requests));
+ rb_erase(&osd->o_node, &osdc->osds);
+ list_del_init(&osd->o_osd_lru);
+ ceph_con_close(&osd->o_con);
+ put_osd(osd);
+}
+
+static void remove_all_osds(struct ceph_osd_client *osdc)
+{
+ dout("__remove_old_osds %p\n", osdc);
+ mutex_lock(&osdc->request_mutex);
+ while (!RB_EMPTY_ROOT(&osdc->osds)) {
+ struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds),
+ struct ceph_osd, o_node);
+ __remove_osd(osdc, osd);
+ }
+ mutex_unlock(&osdc->request_mutex);
+}
+
+static void __move_osd_to_lru(struct ceph_osd_client *osdc,
+ struct ceph_osd *osd)
+{
+ dout("__move_osd_to_lru %p\n", osd);
+ BUG_ON(!list_empty(&osd->o_osd_lru));
+ list_add_tail(&osd->o_osd_lru, &osdc->osd_lru);
+ osd->lru_ttl = jiffies + osdc->client->options->osd_idle_ttl * HZ;
+}
+
+static void __remove_osd_from_lru(struct ceph_osd *osd)
+{
+ dout("__remove_osd_from_lru %p\n", osd);
+ if (!list_empty(&osd->o_osd_lru))
+ list_del_init(&osd->o_osd_lru);
+}
+
+static void remove_old_osds(struct ceph_osd_client *osdc)
+{
+ struct ceph_osd *osd, *nosd;
+
+ dout("__remove_old_osds %p\n", osdc);
+ mutex_lock(&osdc->request_mutex);
+ list_for_each_entry_safe(osd, nosd, &osdc->osd_lru, o_osd_lru) {
+ if (time_before(jiffies, osd->lru_ttl))
+ break;
+ __remove_osd(osdc, osd);
+ }
+ mutex_unlock(&osdc->request_mutex);
+}
+
+/*
+ * reset osd connect
+ */
+static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
+{
+ struct ceph_osd_request *req;
+ int ret = 0;
+
+ dout("__reset_osd %p osd%d\n", osd, osd->o_osd);
+ if (list_empty(&osd->o_requests) &&
+ list_empty(&osd->o_linger_requests)) {
+ __remove_osd(osdc, osd);
+ ret = -ENODEV;
+ } else if (memcmp(&osdc->osdmap->osd_addr[osd->o_osd],
+ &osd->o_con.peer_addr,
+ sizeof(osd->o_con.peer_addr)) == 0 &&
+ !ceph_con_opened(&osd->o_con)) {
+ dout(" osd addr hasn't changed and connection never opened,"
+ " letting msgr retry");
+ /* touch each r_stamp for handle_timeout()'s benfit */
+ list_for_each_entry(req, &osd->o_requests, r_osd_item)
+ req->r_stamp = jiffies;
+ ret = -EAGAIN;
+ } else {
+ ceph_con_close(&osd->o_con);
+ ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd,
+ &osdc->osdmap->osd_addr[osd->o_osd]);
+ osd->o_incarnation++;
+ }
+ return ret;
+}
+
+static void __insert_osd(struct ceph_osd_client *osdc, struct ceph_osd *new)
+{
+ struct rb_node **p = &osdc->osds.rb_node;
+ struct rb_node *parent = NULL;
+ struct ceph_osd *osd = NULL;
+
+ dout("__insert_osd %p osd%d\n", new, new->o_osd);
+ while (*p) {
+ parent = *p;
+ osd = rb_entry(parent, struct ceph_osd, o_node);
+ if (new->o_osd < osd->o_osd)
+ p = &(*p)->rb_left;
+ else if (new->o_osd > osd->o_osd)
+ p = &(*p)->rb_right;
+ else
+ BUG();
+ }
+
+ rb_link_node(&new->o_node, parent, p);
+ rb_insert_color(&new->o_node, &osdc->osds);
+}
+
+static struct ceph_osd *__lookup_osd(struct ceph_osd_client *osdc, int o)
+{
+ struct ceph_osd *osd;
+ struct rb_node *n = osdc->osds.rb_node;
+
+ while (n) {
+ osd = rb_entry(n, struct ceph_osd, o_node);
+ if (o < osd->o_osd)
+ n = n->rb_left;
+ else if (o > osd->o_osd)
+ n = n->rb_right;
+ else
+ return osd;
+ }
+ return NULL;
+}
+
+static void __schedule_osd_timeout(struct ceph_osd_client *osdc)
+{
+ schedule_delayed_work(&osdc->timeout_work,
+ osdc->client->options->osd_keepalive_timeout * HZ);
+}
+
+static void __cancel_osd_timeout(struct ceph_osd_client *osdc)
+{
+ cancel_delayed_work(&osdc->timeout_work);
+}
+
+/*
+ * Register request, assign tid. If this is the first request, set up
+ * the timeout event.
+ */
+static void __register_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ req->r_tid = ++osdc->last_tid;
+ req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
+ dout("__register_request %p tid %lld\n", req, req->r_tid);
+ __insert_request(osdc, req);
+ ceph_osdc_get_request(req);
+ osdc->num_requests++;
+ if (osdc->num_requests == 1) {
+ dout(" first request, scheduling timeout\n");
+ __schedule_osd_timeout(osdc);
+ }
+}
+
+static void register_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ mutex_lock(&osdc->request_mutex);
+ __register_request(osdc, req);
+ mutex_unlock(&osdc->request_mutex);
+}
+
+/*
+ * called under osdc->request_mutex
+ */
+static void __unregister_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ if (RB_EMPTY_NODE(&req->r_node)) {
+ dout("__unregister_request %p tid %lld not registered\n",
+ req, req->r_tid);
+ return;
+ }
+
+ dout("__unregister_request %p tid %lld\n", req, req->r_tid);
+ rb_erase(&req->r_node, &osdc->requests);
+ osdc->num_requests--;
+
+ if (req->r_osd) {
+ /* make sure the original request isn't in flight. */
+ ceph_msg_revoke(req->r_request);
+
+ list_del_init(&req->r_osd_item);
+ if (list_empty(&req->r_osd->o_requests) &&
+ list_empty(&req->r_osd->o_linger_requests)) {
+ dout("moving osd to %p lru\n", req->r_osd);
+ __move_osd_to_lru(osdc, req->r_osd);
+ }
+ if (list_empty(&req->r_linger_item))
+ req->r_osd = NULL;
+ }
+
+ list_del_init(&req->r_req_lru_item);
+ ceph_osdc_put_request(req);
+
+ if (osdc->num_requests == 0) {
+ dout(" no requests, canceling timeout\n");
+ __cancel_osd_timeout(osdc);
+ }
+}
+
+/*
+ * Cancel a previously queued request message
+ */
+static void __cancel_request(struct ceph_osd_request *req)
+{
+ if (req->r_sent && req->r_osd) {
+ ceph_msg_revoke(req->r_request);
+ req->r_sent = 0;
+ }
+}
+
+static void __register_linger_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ dout("__register_linger_request %p\n", req);
+ list_add_tail(&req->r_linger_item, &osdc->req_linger);
+ if (req->r_osd)
+ list_add_tail(&req->r_linger_osd,
+ &req->r_osd->o_linger_requests);
+}
+
+static void __unregister_linger_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ dout("__unregister_linger_request %p\n", req);
+ list_del_init(&req->r_linger_item);
+ if (req->r_osd) {
+ list_del_init(&req->r_linger_osd);
+
+ if (list_empty(&req->r_osd->o_requests) &&
+ list_empty(&req->r_osd->o_linger_requests)) {
+ dout("moving osd to %p lru\n", req->r_osd);
+ __move_osd_to_lru(osdc, req->r_osd);
+ }
+ if (list_empty(&req->r_osd_item))
+ req->r_osd = NULL;
+ }
+}
+
+void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ mutex_lock(&osdc->request_mutex);
+ if (req->r_linger) {
+ __unregister_linger_request(osdc, req);
+ ceph_osdc_put_request(req);
+ }
+ mutex_unlock(&osdc->request_mutex);
+}
+EXPORT_SYMBOL(ceph_osdc_unregister_linger_request);
+
+void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ if (!req->r_linger) {
+ dout("set_request_linger %p\n", req);
+ req->r_linger = 1;
+ /*
+ * caller is now responsible for calling
+ * unregister_linger_request
+ */
+ ceph_osdc_get_request(req);
+ }
+}
+EXPORT_SYMBOL(ceph_osdc_set_request_linger);
+
+/*
+ * Pick an osd (the first 'up' osd in the pg), allocate the osd struct
+ * (as needed), and set the request r_osd appropriately. If there is
+ * no up osd, set r_osd to NULL. Move the request to the appropriate list
+ * (unsent, homeless) or leave on in-flight lru.
+ *
+ * Return 0 if unchanged, 1 if changed, or negative on error.
+ *
+ * Caller should hold map_sem for read and request_mutex.
+ */
+static int __map_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req, int force_resend)
+{
+ struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
+ struct ceph_pg pgid;
+ int acting[CEPH_PG_MAX_SIZE];
+ int o = -1, num = 0;
+ int err;
+
+ dout("map_request %p tid %lld\n", req, req->r_tid);
+ err = ceph_calc_object_layout(&reqhead->layout, req->r_oid,
+ &req->r_file_layout, osdc->osdmap);
+ if (err) {
+ list_move(&req->r_req_lru_item, &osdc->req_notarget);
+ return err;
+ }
+ pgid = reqhead->layout.ol_pgid;
+ req->r_pgid = pgid;
+
+ err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
+ if (err > 0) {
+ o = acting[0];
+ num = err;
+ }
+
+ if ((!force_resend &&
+ req->r_osd && req->r_osd->o_osd == o &&
+ req->r_sent >= req->r_osd->o_incarnation &&
+ req->r_num_pg_osds == num &&
+ memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
+ (req->r_osd == NULL && o == -1))
+ return 0; /* no change */
+
+ dout("map_request tid %llu pgid %d.%x osd%d (was osd%d)\n",
+ req->r_tid, le32_to_cpu(pgid.pool), le16_to_cpu(pgid.ps), o,
+ req->r_osd ? req->r_osd->o_osd : -1);
+
+ /* record full pg acting set */
+ memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
+ req->r_num_pg_osds = num;
+
+ if (req->r_osd) {
+ __cancel_request(req);
+ list_del_init(&req->r_osd_item);
+ req->r_osd = NULL;
+ }
+
+ req->r_osd = __lookup_osd(osdc, o);
+ if (!req->r_osd && o >= 0) {
+ err = -ENOMEM;
+ req->r_osd = create_osd(osdc, o);
+ if (!req->r_osd) {
+ list_move(&req->r_req_lru_item, &osdc->req_notarget);
+ goto out;
+ }
+
+ dout("map_request osd %p is osd%d\n", req->r_osd, o);
+ __insert_osd(osdc, req->r_osd);
+
+ ceph_con_open(&req->r_osd->o_con,
+ CEPH_ENTITY_TYPE_OSD, o,
+ &osdc->osdmap->osd_addr[o]);
+ }
+
+ if (req->r_osd) {
+ __remove_osd_from_lru(req->r_osd);
+ list_add(&req->r_osd_item, &req->r_osd->o_requests);
+ list_move(&req->r_req_lru_item, &osdc->req_unsent);
+ } else {
+ list_move(&req->r_req_lru_item, &osdc->req_notarget);
+ }
+ err = 1; /* osd or pg changed */
+
+out:
+ return err;
+}
+
+/*
+ * caller should hold map_sem (for read) and request_mutex
+ */
+static void __send_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ struct ceph_osd_request_head *reqhead;
+
+ dout("send_request %p tid %llu to osd%d flags %d\n",
+ req, req->r_tid, req->r_osd->o_osd, req->r_flags);
+
+ reqhead = req->r_request->front.iov_base;
+ reqhead->osdmap_epoch = cpu_to_le32(osdc->osdmap->epoch);
+ reqhead->flags |= cpu_to_le32(req->r_flags); /* e.g., RETRY */
+ reqhead->reassert_version = req->r_reassert_version;
+
+ req->r_stamp = jiffies;
+ list_move_tail(&req->r_req_lru_item, &osdc->req_lru);
+
+ ceph_msg_get(req->r_request); /* send consumes a ref */
+ ceph_con_send(&req->r_osd->o_con, req->r_request);
+ req->r_sent = req->r_osd->o_incarnation;
+}
+
+/*
+ * Send any requests in the queue (req_unsent).
+ */
+static void send_queued(struct ceph_osd_client *osdc)
+{
+ struct ceph_osd_request *req, *tmp;
+
+ dout("send_queued\n");
+ mutex_lock(&osdc->request_mutex);
+ list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) {
+ __send_request(osdc, req);
+ }
+ mutex_unlock(&osdc->request_mutex);
+}
+
+/*
+ * Timeout callback, called every N seconds when 1 or more osd
+ * requests has been active for more than N seconds. When this
+ * happens, we ping all OSDs with requests who have timed out to
+ * ensure any communications channel reset is detected. Reset the
+ * request timeouts another N seconds in the future as we go.
+ * Reschedule the timeout event another N seconds in future (unless
+ * there are no open requests).
+ */
+static void handle_timeout(struct work_struct *work)
+{
+ struct ceph_osd_client *osdc =
+ container_of(work, struct ceph_osd_client, timeout_work.work);
+ struct ceph_osd_request *req;
+ struct ceph_osd *osd;
+ unsigned long keepalive =
+ osdc->client->options->osd_keepalive_timeout * HZ;
+ struct list_head slow_osds;
+ dout("timeout\n");
+ down_read(&osdc->map_sem);
+
+ ceph_monc_request_next_osdmap(&osdc->client->monc);
+
+ mutex_lock(&osdc->request_mutex);
+
+ /*
+ * ping osds that are a bit slow. this ensures that if there
+ * is a break in the TCP connection we will notice, and reopen
+ * a connection with that osd (from the fault callback).
+ */
+ INIT_LIST_HEAD(&slow_osds);
+ list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
+ if (time_before(jiffies, req->r_stamp + keepalive))
+ break;
+
+ osd = req->r_osd;
+ BUG_ON(!osd);
+ dout(" tid %llu is slow, will send keepalive on osd%d\n",
+ req->r_tid, osd->o_osd);
+ list_move_tail(&osd->o_keepalive_item, &slow_osds);
+ }
+ while (!list_empty(&slow_osds)) {
+ osd = list_entry(slow_osds.next, struct ceph_osd,
+ o_keepalive_item);
+ list_del_init(&osd->o_keepalive_item);
+ ceph_con_keepalive(&osd->o_con);
+ }
+
+ __schedule_osd_timeout(osdc);
+ mutex_unlock(&osdc->request_mutex);
+ send_queued(osdc);
+ up_read(&osdc->map_sem);
+}
+
+static void handle_osds_timeout(struct work_struct *work)
+{
+ struct ceph_osd_client *osdc =
+ container_of(work, struct ceph_osd_client,
+ osds_timeout_work.work);
+ unsigned long delay =
+ osdc->client->options->osd_idle_ttl * HZ >> 2;
+
+ dout("osds timeout\n");
+ down_read(&osdc->map_sem);
+ remove_old_osds(osdc);
+ up_read(&osdc->map_sem);
+
+ schedule_delayed_work(&osdc->osds_timeout_work,
+ round_jiffies_relative(delay));
+}
+
+static void complete_request(struct ceph_osd_request *req)
+{
+ if (req->r_safe_callback)
+ req->r_safe_callback(req, NULL);
+ complete_all(&req->r_safe_completion); /* fsync waiter */
+}
+
+/*
+ * handle osd op reply. either call the callback if it is specified,
+ * or do the completion to wake up the waiting thread.
+ */
+static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
+ struct ceph_connection *con)
+{
+ struct ceph_osd_reply_head *rhead = msg->front.iov_base;
+ struct ceph_osd_request *req;
+ u64 tid;
+ int numops, object_len, flags;
+ s32 result;
+
+ tid = le64_to_cpu(msg->hdr.tid);
+ if (msg->front.iov_len < sizeof(*rhead))
+ goto bad;
+ numops = le32_to_cpu(rhead->num_ops);
+ object_len = le32_to_cpu(rhead->object_len);
+ result = le32_to_cpu(rhead->result);
+ if (msg->front.iov_len != sizeof(*rhead) + object_len +
+ numops * sizeof(struct ceph_osd_op))
+ goto bad;
+ dout("handle_reply %p tid %llu result %d\n", msg, tid, (int)result);
+ /* lookup */
+ mutex_lock(&osdc->request_mutex);
+ req = __lookup_request(osdc, tid);
+ if (req == NULL) {
+ dout("handle_reply tid %llu dne\n", tid);
+ mutex_unlock(&osdc->request_mutex);
+ return;
+ }
+ ceph_osdc_get_request(req);
+ flags = le32_to_cpu(rhead->flags);
+
+ /*
+ * if this connection filled our message, drop our reference now, to
+ * avoid a (safe but slower) revoke later.
+ */
+ if (req->r_con_filling_msg == con && req->r_reply == msg) {
+ dout(" dropping con_filling_msg ref %p\n", con);
+ req->r_con_filling_msg = NULL;
+ con->ops->put(con);
+ }
+
+ if (!req->r_got_reply) {
+ unsigned bytes;
+
+ req->r_result = le32_to_cpu(rhead->result);
+ bytes = le32_to_cpu(msg->hdr.data_len);
+ dout("handle_reply result %d bytes %d\n", req->r_result,
+ bytes);
+ if (req->r_result == 0)
+ req->r_result = bytes;
+
+ /* in case this is a write and we need to replay, */
+ req->r_reassert_version = rhead->reassert_version;
+
+ req->r_got_reply = 1;
+ } else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
+ dout("handle_reply tid %llu dup ack\n", tid);
+ mutex_unlock(&osdc->request_mutex);
+ goto done;
+ }
+
+ dout("handle_reply tid %llu flags %d\n", tid, flags);
+
+ if (req->r_linger && (flags & CEPH_OSD_FLAG_ONDISK))
+ __register_linger_request(osdc, req);
+
+ /* either this is a read, or we got the safe response */
+ if (result < 0 ||
+ (flags & CEPH_OSD_FLAG_ONDISK) ||
+ ((flags & CEPH_OSD_FLAG_WRITE) == 0))
+ __unregister_request(osdc, req);
+
+ mutex_unlock(&osdc->request_mutex);
+
+ if (req->r_callback)
+ req->r_callback(req, msg);
+ else
+ complete_all(&req->r_completion);
+
+ if (flags & CEPH_OSD_FLAG_ONDISK)
+ complete_request(req);
+
+done:
+ dout("req=%p req->r_linger=%d\n", req, req->r_linger);
+ ceph_osdc_put_request(req);
+ return;
+
+bad:
+ pr_err("corrupt osd_op_reply got %d %d expected %d\n",
+ (int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len),
+ (int)sizeof(*rhead));
+ ceph_msg_dump(msg);
+}
+
+static void reset_changed_osds(struct ceph_osd_client *osdc)
+{
+ struct rb_node *p, *n;
+
+ for (p = rb_first(&osdc->osds); p; p = n) {
+ struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
+
+ n = rb_next(p);
+ if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
+ memcmp(&osd->o_con.peer_addr,
+ ceph_osd_addr(osdc->osdmap,
+ osd->o_osd),
+ sizeof(struct ceph_entity_addr)) != 0)
+ __reset_osd(osdc, osd);
+ }
+}
+
+/*
+ * Requeue requests whose mapping to an OSD has changed. If requests map to
+ * no osd, request a new map.
+ *
+ * Caller should hold map_sem for read.
+ */
+static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
+ bool force_resend_writes)
+{
+ struct ceph_osd_request *req, *nreq;
+ struct rb_node *p;
+ int needmap = 0;
+ int err;
+ bool force_resend_req;
+
+ dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
+ force_resend_writes ? " (force resend writes)" : "");
+ mutex_lock(&osdc->request_mutex);
+ for (p = rb_first(&osdc->requests); p; ) {
+ req = rb_entry(p, struct ceph_osd_request, r_node);
+ p = rb_next(p);
+
+ /*
+ * For linger requests that have not yet been
+ * registered, move them to the linger list; they'll
+ * be sent to the osd in the loop below. Unregister
+ * the request before re-registering it as a linger
+ * request to ensure the __map_request() below
+ * will decide it needs to be sent.
+ */
+ if (req->r_linger && list_empty(&req->r_linger_item)) {
+ dout("%p tid %llu restart on osd%d\n",
+ req, req->r_tid,
+ req->r_osd ? req->r_osd->o_osd : -1);
+ __unregister_request(osdc, req);
+ __register_linger_request(osdc, req);
+ continue;
+ }
+
+ force_resend_req = force_resend ||
+ (force_resend_writes &&
+ req->r_flags & CEPH_OSD_FLAG_WRITE);
+ err = __map_request(osdc, req, force_resend_req);
+ if (err < 0)
+ continue; /* error */
+ if (req->r_osd == NULL) {
+ dout("%p tid %llu maps to no osd\n", req, req->r_tid);
+ needmap++; /* request a newer map */
+ } else if (err > 0) {
+ if (!req->r_linger) {
+ dout("%p tid %llu requeued on osd%d\n", req,
+ req->r_tid,
+ req->r_osd ? req->r_osd->o_osd : -1);
+ req->r_flags |= CEPH_OSD_FLAG_RETRY;
+ }
+ }
+ }
+
+ list_for_each_entry_safe(req, nreq, &osdc->req_linger,
+ r_linger_item) {
+ dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
+
+ err = __map_request(osdc, req,
+ force_resend || force_resend_writes);
+ dout("__map_request returned %d\n", err);
+ if (err == 0)
+ continue; /* no change and no osd was specified */
+ if (err < 0)
+ continue; /* hrm! */
+ if (req->r_osd == NULL) {
+ dout("tid %llu maps to no valid osd\n", req->r_tid);
+ needmap++; /* request a newer map */
+ continue;
+ }
+
+ dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
+ req->r_osd ? req->r_osd->o_osd : -1);
+ __register_request(osdc, req);
+ __unregister_linger_request(osdc, req);
+ }
+ reset_changed_osds(osdc);
+ mutex_unlock(&osdc->request_mutex);
+
+ if (needmap) {
+ dout("%d requests for down osds, need new map\n", needmap);
+ ceph_monc_request_next_osdmap(&osdc->client->monc);
+ }
+}
+
+
+/*
+ * Process updated osd map.
+ *
+ * The message contains any number of incremental and full maps, normally
+ * indicating some sort of topology change in the cluster. Kick requests
+ * off to different OSDs as needed.
+ */
+void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
+{
+ void *p, *end, *next;
+ u32 nr_maps, maplen;
+ u32 epoch;
+ struct ceph_osdmap *newmap = NULL, *oldmap;
+ int err;
+ struct ceph_fsid fsid;
+ bool was_full;
+
+ dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
+ p = msg->front.iov_base;
+ end = p + msg->front.iov_len;
+
+ /* verify fsid */
+ ceph_decode_need(&p, end, sizeof(fsid), bad);
+ ceph_decode_copy(&p, &fsid, sizeof(fsid));
+ if (ceph_check_fsid(osdc->client, &fsid) < 0)
+ return;
+
+ down_write(&osdc->map_sem);
+
+ was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
+
+ /* incremental maps */
+ ceph_decode_32_safe(&p, end, nr_maps, bad);
+ dout(" %d inc maps\n", nr_maps);
+ while (nr_maps > 0) {
+ ceph_decode_need(&p, end, 2*sizeof(u32), bad);
+ epoch = ceph_decode_32(&p);
+ maplen = ceph_decode_32(&p);
+ ceph_decode_need(&p, end, maplen, bad);
+ next = p + maplen;
+ if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
+ dout("applying incremental map %u len %d\n",
+ epoch, maplen);
+ newmap = osdmap_apply_incremental(&p, next,
+ osdc->osdmap,
+ &osdc->client->msgr);
+ if (IS_ERR(newmap)) {
+ err = PTR_ERR(newmap);
+ goto bad;
+ }
+ BUG_ON(!newmap);
+ if (newmap != osdc->osdmap) {
+ ceph_osdmap_destroy(osdc->osdmap);
+ osdc->osdmap = newmap;
+ }
+ was_full = was_full ||
+ ceph_osdmap_flag(osdc->osdmap,
+ CEPH_OSDMAP_FULL);
+ kick_requests(osdc, 0, was_full);
+ } else {
+ dout("ignoring incremental map %u len %d\n",
+ epoch, maplen);
+ }
+ p = next;
+ nr_maps--;
+ }
+ if (newmap)
+ goto done;
+
+ /* full maps */
+ ceph_decode_32_safe(&p, end, nr_maps, bad);
+ dout(" %d full maps\n", nr_maps);
+ while (nr_maps) {
+ ceph_decode_need(&p, end, 2*sizeof(u32), bad);
+ epoch = ceph_decode_32(&p);
+ maplen = ceph_decode_32(&p);
+ ceph_decode_need(&p, end, maplen, bad);
+ if (nr_maps > 1) {
+ dout("skipping non-latest full map %u len %d\n",
+ epoch, maplen);
+ } else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
+ dout("skipping full map %u len %d, "
+ "older than our %u\n", epoch, maplen,
+ osdc->osdmap->epoch);
+ } else {
+ int skipped_map = 0;
+
+ dout("taking full map %u len %d\n", epoch, maplen);
+ newmap = osdmap_decode(&p, p+maplen);
+ if (IS_ERR(newmap)) {
+ err = PTR_ERR(newmap);
+ goto bad;
+ }
+ BUG_ON(!newmap);
+ oldmap = osdc->osdmap;
+ osdc->osdmap = newmap;
+ if (oldmap) {
+ if (oldmap->epoch + 1 < newmap->epoch)
+ skipped_map = 1;
+ ceph_osdmap_destroy(oldmap);
+ }
+ was_full = was_full ||
+ ceph_osdmap_flag(osdc->osdmap,
+ CEPH_OSDMAP_FULL);
+ kick_requests(osdc, skipped_map, was_full);
+ }
+ p += maplen;
+ nr_maps--;
+ }
+
+done:
+ downgrade_write(&osdc->map_sem);
+ ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
+
+ /*
+ * subscribe to subsequent osdmap updates if full to ensure
+ * we find out when we are no longer full and stop returning
+ * ENOSPC.
+ */
+ if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
+ ceph_monc_request_next_osdmap(&osdc->client->monc);
+
+ send_queued(osdc);
+ up_read(&osdc->map_sem);
+ wake_up_all(&osdc->client->auth_wq);
+ return;
+
+bad:
+ pr_err("osdc handle_map corrupt msg\n");
+ ceph_msg_dump(msg);
+ up_write(&osdc->map_sem);
+ return;
+}
+
+/*
+ * watch/notify callback event infrastructure
+ *
+ * These callbacks are used both for watch and notify operations.
+ */
+static void __release_event(struct kref *kref)
+{
+ struct ceph_osd_event *event =
+ container_of(kref, struct ceph_osd_event, kref);
+
+ dout("__release_event %p\n", event);
+ kfree(event);
+}
+
+static void get_event(struct ceph_osd_event *event)
+{
+ kref_get(&event->kref);
+}
+
+void ceph_osdc_put_event(struct ceph_osd_event *event)
+{
+ kref_put(&event->kref, __release_event);
+}
+EXPORT_SYMBOL(ceph_osdc_put_event);
+
+static void __insert_event(struct ceph_osd_client *osdc,
+ struct ceph_osd_event *new)
+{
+ struct rb_node **p = &osdc->event_tree.rb_node;
+ struct rb_node *parent = NULL;
+ struct ceph_osd_event *event = NULL;
+
+ while (*p) {
+ parent = *p;
+ event = rb_entry(parent, struct ceph_osd_event, node);
+ if (new->cookie < event->cookie)
+ p = &(*p)->rb_left;
+ else if (new->cookie > event->cookie)
+ p = &(*p)->rb_right;
+ else
+ BUG();
+ }
+
+ rb_link_node(&new->node, parent, p);
+ rb_insert_color(&new->node, &osdc->event_tree);
+}
+
+static struct ceph_osd_event *__find_event(struct ceph_osd_client *osdc,
+ u64 cookie)
+{
+ struct rb_node **p = &osdc->event_tree.rb_node;
+ struct rb_node *parent = NULL;
+ struct ceph_osd_event *event = NULL;
+
+ while (*p) {
+ parent = *p;
+ event = rb_entry(parent, struct ceph_osd_event, node);
+ if (cookie < event->cookie)
+ p = &(*p)->rb_left;
+ else if (cookie > event->cookie)
+ p = &(*p)->rb_right;
+ else
+ return event;
+ }
+ return NULL;
+}
+
+static void __remove_event(struct ceph_osd_event *event)
+{
+ struct ceph_osd_client *osdc = event->osdc;
+
+ if (!RB_EMPTY_NODE(&event->node)) {
+ dout("__remove_event removed %p\n", event);
+ rb_erase(&event->node, &osdc->event_tree);
+ ceph_osdc_put_event(event);
+ } else {
+ dout("__remove_event didn't remove %p\n", event);
+ }
+}
+
+int ceph_osdc_create_event(struct ceph_osd_client *osdc,
+ void (*event_cb)(u64, u64, u8, void *),
+ int one_shot, void *data,
+ struct ceph_osd_event **pevent)
+{
+ struct ceph_osd_event *event;
+
+ event = kmalloc(sizeof(*event), GFP_NOIO);
+ if (!event)
+ return -ENOMEM;
+
+ dout("create_event %p\n", event);
+ event->cb = event_cb;
+ event->one_shot = one_shot;
+ event->data = data;
+ event->osdc = osdc;
+ INIT_LIST_HEAD(&event->osd_node);
+ RB_CLEAR_NODE(&event->node);
+ kref_init(&event->kref); /* one ref for us */
+ kref_get(&event->kref); /* one ref for the caller */
+ init_completion(&event->completion);
+
+ spin_lock(&osdc->event_lock);
+ event->cookie = ++osdc->event_count;
+ __insert_event(osdc, event);
+ spin_unlock(&osdc->event_lock);
+
+ *pevent = event;
+ return 0;
+}
+EXPORT_SYMBOL(ceph_osdc_create_event);
+
+void ceph_osdc_cancel_event(struct ceph_osd_event *event)
+{
+ struct ceph_osd_client *osdc = event->osdc;
+
+ dout("cancel_event %p\n", event);
+ spin_lock(&osdc->event_lock);
+ __remove_event(event);
+ spin_unlock(&osdc->event_lock);
+ ceph_osdc_put_event(event); /* caller's */
+}
+EXPORT_SYMBOL(ceph_osdc_cancel_event);
+
+
+static void do_event_work(struct work_struct *work)
+{
+ struct ceph_osd_event_work *event_work =
+ container_of(work, struct ceph_osd_event_work, work);
+ struct ceph_osd_event *event = event_work->event;
+ u64 ver = event_work->ver;
+ u64 notify_id = event_work->notify_id;
+ u8 opcode = event_work->opcode;
+
+ dout("do_event_work completing %p\n", event);
+ event->cb(ver, notify_id, opcode, event->data);
+ complete(&event->completion);
+ dout("do_event_work completed %p\n", event);
+ ceph_osdc_put_event(event);
+ kfree(event_work);
+}
+
+
+/*
+ * Process osd watch notifications
+ */
+void handle_watch_notify(struct ceph_osd_client *osdc, struct ceph_msg *msg)
+{
+ void *p, *end;
+ u8 proto_ver;
+ u64 cookie, ver, notify_id;
+ u8 opcode;
+ struct ceph_osd_event *event;
+ struct ceph_osd_event_work *event_work;
+
+ p = msg->front.iov_base;
+ end = p + msg->front.iov_len;
+
+ ceph_decode_8_safe(&p, end, proto_ver, bad);
+ ceph_decode_8_safe(&p, end, opcode, bad);
+ ceph_decode_64_safe(&p, end, cookie, bad);
+ ceph_decode_64_safe(&p, end, ver, bad);
+ ceph_decode_64_safe(&p, end, notify_id, bad);
+
+ spin_lock(&osdc->event_lock);
+ event = __find_event(osdc, cookie);
+ if (event) {
+ get_event(event);
+ if (event->one_shot)
+ __remove_event(event);
+ }
+ spin_unlock(&osdc->event_lock);
+ dout("handle_watch_notify cookie %lld ver %lld event %p\n",
+ cookie, ver, event);
+ if (event) {
+ event_work = kmalloc(sizeof(*event_work), GFP_NOIO);
+ if (!event_work) {
+ dout("ERROR: could not allocate event_work\n");
+ goto done_err;
+ }
+ INIT_WORK(&event_work->work, do_event_work);
+ event_work->event = event;
+ event_work->ver = ver;
+ event_work->notify_id = notify_id;
+ event_work->opcode = opcode;
+ if (!queue_work(osdc->notify_wq, &event_work->work)) {
+ dout("WARNING: failed to queue notify event work\n");
+ goto done_err;
+ }
+ }
+
+ return;
+
+done_err:
+ complete(&event->completion);
+ ceph_osdc_put_event(event);
+ return;
+
+bad:
+ pr_err("osdc handle_watch_notify corrupt msg\n");
+ return;
+}
+
+int ceph_osdc_wait_event(struct ceph_osd_event *event, unsigned long timeout)
+{
+ int err;
+
+ dout("wait_event %p\n", event);
+ err = wait_for_completion_interruptible_timeout(&event->completion,
+ timeout * HZ);
+ ceph_osdc_put_event(event);
+ if (err > 0)
+ err = 0;
+ dout("wait_event %p returns %d\n", event, err);
+ return err;
+}
+EXPORT_SYMBOL(ceph_osdc_wait_event);
+
+/*
+ * Register request, send initial attempt.
+ */
+int ceph_osdc_start_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req,
+ bool nofail)
+{
+ int rc = 0;
+
+ req->r_request->pages = req->r_pages;
+ req->r_request->nr_pages = req->r_num_pages;
+#ifdef CONFIG_BLOCK
+ req->r_request->bio = req->r_bio;
+#endif
+ req->r_request->trail = req->r_trail;
+
+ register_request(osdc, req);
+
+ down_read(&osdc->map_sem);
+ mutex_lock(&osdc->request_mutex);
+ /*
+ * a racing kick_requests() may have sent the message for us
+ * while we dropped request_mutex above, so only send now if
+ * the request still han't been touched yet.
+ */
+ if (req->r_sent == 0) {
+ rc = __map_request(osdc, req, 0);
+ if (rc < 0) {
+ if (nofail) {
+ dout("osdc_start_request failed map, "
+ " will retry %lld\n", req->r_tid);
+ rc = 0;
+ } else {
+ __unregister_request(osdc, req);
+ }
+ goto out_unlock;
+ }
+ if (req->r_osd == NULL) {
+ dout("send_request %p no up osds in pg\n", req);
+ ceph_monc_request_next_osdmap(&osdc->client->monc);
+ } else {
+ __send_request(osdc, req);
+ }
+ rc = 0;
+ }
+
+out_unlock:
+ mutex_unlock(&osdc->request_mutex);
+ up_read(&osdc->map_sem);
+ return rc;
+}
+EXPORT_SYMBOL(ceph_osdc_start_request);
+
+/*
+ * wait for a request to complete
+ */
+int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
+ struct ceph_osd_request *req)
+{
+ int rc;
+
+ rc = wait_for_completion_interruptible(&req->r_completion);
+ if (rc < 0) {
+ mutex_lock(&osdc->request_mutex);
+ __cancel_request(req);
+ __unregister_request(osdc, req);
+ mutex_unlock(&osdc->request_mutex);
+ complete_request(req);
+ dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
+ return rc;
+ }
+
+ dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
+ return req->r_result;
+}
+EXPORT_SYMBOL(ceph_osdc_wait_request);
+
+/*
+ * sync - wait for all in-flight requests to flush. avoid starvation.
+ */
+void ceph_osdc_sync(struct ceph_osd_client *osdc)
+{
+ struct ceph_osd_request *req;
+ u64 last_tid, next_tid = 0;
+
+ mutex_lock(&osdc->request_mutex);
+ last_tid = osdc->last_tid;
+ while (1) {
+ req = __lookup_request_ge(osdc, next_tid);
+ if (!req)
+ break;
+ if (req->r_tid > last_tid)
+ break;
+
+ next_tid = req->r_tid + 1;
+ if ((req->r_flags & CEPH_OSD_FLAG_WRITE) == 0)
+ continue;
+
+ ceph_osdc_get_request(req);
+ mutex_unlock(&osdc->request_mutex);
+ dout("sync waiting on tid %llu (last is %llu)\n",
+ req->r_tid, last_tid);
+ wait_for_completion(&req->r_safe_completion);
+ mutex_lock(&osdc->request_mutex);
+ ceph_osdc_put_request(req);
+ }
+ mutex_unlock(&osdc->request_mutex);
+ dout("sync done (thru tid %llu)\n", last_tid);
+}
+EXPORT_SYMBOL(ceph_osdc_sync);
+
+/*
+ * init, shutdown
+ */
+int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
+{
+ int err;
+
+ dout("init\n");
+ osdc->client = client;
+ osdc->osdmap = NULL;
+ init_rwsem(&osdc->map_sem);
+ init_completion(&osdc->map_waiters);
+ osdc->last_requested_map = 0;
+ mutex_init(&osdc->request_mutex);
+ osdc->last_tid = 0;
+ osdc->osds = RB_ROOT;
+ INIT_LIST_HEAD(&osdc->osd_lru);
+ osdc->requests = RB_ROOT;
+ INIT_LIST_HEAD(&osdc->req_lru);
+ INIT_LIST_HEAD(&osdc->req_unsent);
+ INIT_LIST_HEAD(&osdc->req_notarget);
+ INIT_LIST_HEAD(&osdc->req_linger);
+ osdc->num_requests = 0;
+ INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
+ INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
+ spin_lock_init(&osdc->event_lock);
+ osdc->event_tree = RB_ROOT;
+ osdc->event_count = 0;
+
+ schedule_delayed_work(&osdc->osds_timeout_work,
+ round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
+
+ err = -ENOMEM;
+ osdc->req_mempool = mempool_create_kmalloc_pool(10,
+ sizeof(struct ceph_osd_request));
+ if (!osdc->req_mempool)
+ goto out;
+
+ err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
+ OSD_OP_FRONT_LEN, 10, true,
+ "osd_op");
+ if (err < 0)
+ goto out_mempool;
+ err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
+ OSD_OPREPLY_FRONT_LEN, 10, true,
+ "osd_op_reply");
+ if (err < 0)
+ goto out_msgpool;
+
+ osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
+ if (IS_ERR(osdc->notify_wq)) {
+ err = PTR_ERR(osdc->notify_wq);
+ osdc->notify_wq = NULL;
+ goto out_msgpool;
+ }
+ return 0;
+
+out_msgpool:
+ ceph_msgpool_destroy(&osdc->msgpool_op);
+out_mempool:
+ mempool_destroy(osdc->req_mempool);
+out:
+ return err;
+}
+EXPORT_SYMBOL(ceph_osdc_init);
+
+void ceph_osdc_stop(struct ceph_osd_client *osdc)
+{
+ flush_workqueue(osdc->notify_wq);
+ destroy_workqueue(osdc->notify_wq);
+ cancel_delayed_work_sync(&osdc->timeout_work);
+ cancel_delayed_work_sync(&osdc->osds_timeout_work);
+ if (osdc->osdmap) {
+ ceph_osdmap_destroy(osdc->osdmap);
+ osdc->osdmap = NULL;
+ }
+ remove_all_osds(osdc);
+ mempool_destroy(osdc->req_mempool);
+ ceph_msgpool_destroy(&osdc->msgpool_op);
+ ceph_msgpool_destroy(&osdc->msgpool_op_reply);
+}
+EXPORT_SYMBOL(ceph_osdc_stop);
+
+/*
+ * Read some contiguous pages. If we cross a stripe boundary, shorten
+ * *plen. Return number of bytes read, or error.
+ */
+int ceph_osdc_readpages(struct ceph_osd_client *osdc,
+ struct ceph_vino vino, struct ceph_file_layout *layout,
+ u64 off, u64 *plen,
+ u32 truncate_seq, u64 truncate_size,
+ struct page **pages, int num_pages, int page_align)
+{
+ struct ceph_osd_request *req;
+ int rc = 0;
+
+ dout("readpages on ino %llx.%llx on %llu~%llu\n", vino.ino,
+ vino.snap, off, *plen);
+ req = ceph_osdc_new_request(osdc, layout, vino, off, plen,
+ CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
+ NULL, 0, truncate_seq, truncate_size, NULL,
+ false, 1, page_align);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ /* it may be a short read due to an object boundary */
+ req->r_pages = pages;
+
+ dout("readpages final extent is %llu~%llu (%d pages align %d)\n",
+ off, *plen, req->r_num_pages, page_align);
+
+ rc = ceph_osdc_start_request(osdc, req, false);
+ if (!rc)
+ rc = ceph_osdc_wait_request(osdc, req);
+
+ ceph_osdc_put_request(req);
+ dout("readpages result %d\n", rc);
+ return rc;
+}
+EXPORT_SYMBOL(ceph_osdc_readpages);
+
+/*
+ * do a synchronous write on N pages
+ */
+int ceph_osdc_writepages(struct ceph_osd_client *osdc, struct ceph_vino vino,
+ struct ceph_file_layout *layout,
+ struct ceph_snap_context *snapc,
+ u64 off, u64 len,
+ u32 truncate_seq, u64 truncate_size,
+ struct timespec *mtime,
+ struct page **pages, int num_pages,
+ int flags, int do_sync, bool nofail)
+{
+ struct ceph_osd_request *req;
+ int rc = 0;
+ int page_align = off & ~PAGE_MASK;
+
+ BUG_ON(vino.snap != CEPH_NOSNAP);
+ req = ceph_osdc_new_request(osdc, layout, vino, off, &len,
+ CEPH_OSD_OP_WRITE,
+ flags | CEPH_OSD_FLAG_ONDISK |
+ CEPH_OSD_FLAG_WRITE,
+ snapc, do_sync,
+ truncate_seq, truncate_size, mtime,
+ nofail, 1, page_align);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ /* it may be a short write due to an object boundary */
+ req->r_pages = pages;
+ dout("writepages %llu~%llu (%d pages)\n", off, len,
+ req->r_num_pages);
+
+ rc = ceph_osdc_start_request(osdc, req, nofail);
+ if (!rc)
+ rc = ceph_osdc_wait_request(osdc, req);
+
+ ceph_osdc_put_request(req);
+ if (rc == 0)
+ rc = len;
+ dout("writepages result %d\n", rc);
+ return rc;
+}
+EXPORT_SYMBOL(ceph_osdc_writepages);
+
+/*
+ * handle incoming message
+ */
+static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
+{
+ struct ceph_osd *osd = con->private;
+ struct ceph_osd_client *osdc;
+ int type = le16_to_cpu(msg->hdr.type);
+
+ if (!osd)
+ goto out;
+ osdc = osd->o_osdc;
+
+ switch (type) {
+ case CEPH_MSG_OSD_MAP:
+ ceph_osdc_handle_map(osdc, msg);
+ break;
+ case CEPH_MSG_OSD_OPREPLY:
+ handle_reply(osdc, msg, con);
+ break;
+ case CEPH_MSG_WATCH_NOTIFY:
+ handle_watch_notify(osdc, msg);
+ break;
+
+ default:
+ pr_err("received unknown message type %d %s\n", type,
+ ceph_msg_type_name(type));
+ }
+out:
+ ceph_msg_put(msg);
+}
+
+/*
+ * lookup and return message for incoming reply. set up reply message
+ * pages.
+ */
+static struct ceph_msg *get_reply(struct ceph_connection *con,
+ struct ceph_msg_header *hdr,
+ int *skip)
+{
+ struct ceph_osd *osd = con->private;
+ struct ceph_osd_client *osdc = osd->o_osdc;
+ struct ceph_msg *m;
+ struct ceph_osd_request *req;
+ int front = le32_to_cpu(hdr->front_len);
+ int data_len = le32_to_cpu(hdr->data_len);
+ u64 tid;
+
+ tid = le64_to_cpu(hdr->tid);
+ mutex_lock(&osdc->request_mutex);
+ req = __lookup_request(osdc, tid);
+ if (!req) {
+ *skip = 1;
+ m = NULL;
+ pr_info("get_reply unknown tid %llu from osd%d\n", tid,
+ osd->o_osd);
+ goto out;
+ }
+
+ if (req->r_con_filling_msg) {
+ dout("%s revoking msg %p from old con %p\n", __func__,
+ req->r_reply, req->r_con_filling_msg);
+ ceph_msg_revoke_incoming(req->r_reply);
+ req->r_con_filling_msg->ops->put(req->r_con_filling_msg);
+ req->r_con_filling_msg = NULL;
+ }
+
+ if (front > req->r_reply->front.iov_len) {
+ pr_warning("get_reply front %d > preallocated %d\n",
+ front, (int)req->r_reply->front.iov_len);
+ m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front, GFP_NOFS, false);
+ if (!m)
+ goto out;
+ ceph_msg_put(req->r_reply);
+ req->r_reply = m;
+ }
+ m = ceph_msg_get(req->r_reply);
+
+ if (data_len > 0) {
+ int want = calc_pages_for(req->r_page_alignment, data_len);
+
+ if (unlikely(req->r_num_pages < want)) {
+ pr_warning("tid %lld reply has %d bytes %d pages, we"
+ " had only %d pages ready\n", tid, data_len,
+ want, req->r_num_pages);
+ *skip = 1;
+ ceph_msg_put(m);
+ m = NULL;
+ goto out;
+ }
+ m->pages = req->r_pages;
+ m->nr_pages = req->r_num_pages;
+ m->page_alignment = req->r_page_alignment;
+#ifdef CONFIG_BLOCK
+ m->bio = req->r_bio;
+#endif
+ }
+ *skip = 0;
+ req->r_con_filling_msg = con->ops->get(con);
+ dout("get_reply tid %lld %p\n", tid, m);
+
+out:
+ mutex_unlock(&osdc->request_mutex);
+ return m;
+
+}
+
+static struct ceph_msg *alloc_msg(struct ceph_connection *con,
+ struct ceph_msg_header *hdr,
+ int *skip)
+{
+ struct ceph_osd *osd = con->private;
+ int type = le16_to_cpu(hdr->type);
+ int front = le32_to_cpu(hdr->front_len);
+
+ *skip = 0;
+ switch (type) {
+ case CEPH_MSG_OSD_MAP:
+ case CEPH_MSG_WATCH_NOTIFY:
+ return ceph_msg_new(type, front, GFP_NOFS, false);
+ case CEPH_MSG_OSD_OPREPLY:
+ return get_reply(con, hdr, skip);
+ default:
+ pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
+ osd->o_osd);
+ *skip = 1;
+ return NULL;
+ }
+}
+
+/*
+ * Wrappers to refcount containing ceph_osd struct
+ */
+static struct ceph_connection *get_osd_con(struct ceph_connection *con)
+{
+ struct ceph_osd *osd = con->private;
+ if (get_osd(osd))
+ return con;
+ return NULL;
+}
+
+static void put_osd_con(struct ceph_connection *con)
+{
+ struct ceph_osd *osd = con->private;
+ put_osd(osd);
+}
+
+/*
+ * authentication
+ */
+/*
+ * Note: returned pointer is the address of a structure that's
+ * managed separately. Caller must *not* attempt to free it.
+ */
+static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
+ int *proto, int force_new)
+{
+ struct ceph_osd *o = con->private;
+ struct ceph_osd_client *osdc = o->o_osdc;
+ struct ceph_auth_client *ac = osdc->client->monc.auth;
+ struct ceph_auth_handshake *auth = &o->o_auth;
+
+ if (force_new && auth->authorizer) {
+ ceph_auth_destroy_authorizer(ac, auth->authorizer);
+ auth->authorizer = NULL;
+ }
+ if (!auth->authorizer) {
+ int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
+ auth);
+ if (ret)
+ return ERR_PTR(ret);
+ } else {
+ int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
+ auth);
+ if (ret)
+ return ERR_PTR(ret);
+ }
+ *proto = ac->protocol;
+
+ return auth;
+}
+
+
+static int verify_authorizer_reply(struct ceph_connection *con, int len)
+{
+ struct ceph_osd *o = con->private;
+ struct ceph_osd_client *osdc = o->o_osdc;
+ struct ceph_auth_client *ac = osdc->client->monc.auth;
+
+ return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
+}
+
+static int invalidate_authorizer(struct ceph_connection *con)
+{
+ struct ceph_osd *o = con->private;
+ struct ceph_osd_client *osdc = o->o_osdc;
+ struct ceph_auth_client *ac = osdc->client->monc.auth;
+
+ ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
+ return ceph_monc_validate_auth(&osdc->client->monc);
+}
+
+static const struct ceph_connection_operations osd_con_ops = {
+ .get = get_osd_con,
+ .put = put_osd_con,
+ .dispatch = dispatch,
+ .get_authorizer = get_authorizer,
+ .verify_authorizer_reply = verify_authorizer_reply,
+ .invalidate_authorizer = invalidate_authorizer,
+ .alloc_msg = alloc_msg,
+ .fault = osd_reset,
+};