2009-10-06 20:31:10 +02:00
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#include "ceph_debug.h"
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#include <linux/err.h>
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#include <linux/highmem.h>
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#include <linux/mm.h>
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#include <linux/pagemap.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include "super.h"
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#include "osd_client.h"
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#include "messenger.h"
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#include "decode.h"
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2009-11-19 01:19:57 +01:00
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#include "auth.h"
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2009-10-06 20:31:10 +02:00
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const static struct ceph_connection_operations osd_con_ops;
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static void kick_requests(struct ceph_osd_client *osdc, struct ceph_osd *osd);
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/*
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* Implement client access to distributed object storage cluster.
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*
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* All data objects are stored within a cluster/cloud of OSDs, or
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* "object storage devices." (Note that Ceph OSDs have _nothing_ to
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* do with the T10 OSD extensions to SCSI.) Ceph OSDs are simply
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* remote daemons serving up and coordinating consistent and safe
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* access to storage.
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*
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* Cluster membership and the mapping of data objects onto storage devices
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* are described by the osd map.
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*
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* We keep track of pending OSD requests (read, write), resubmit
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* requests to different OSDs when the cluster topology/data layout
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* change, or retry the affected requests when the communications
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* channel with an OSD is reset.
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*/
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/*
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* calculate the mapping of a file extent onto an object, and fill out the
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* request accordingly. shorten extent as necessary if it crosses an
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* object boundary.
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*
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* fill osd op in request message.
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*/
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static void calc_layout(struct ceph_osd_client *osdc,
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struct ceph_vino vino, struct ceph_file_layout *layout,
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u64 off, u64 *plen,
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struct ceph_osd_request *req)
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{
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struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
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struct ceph_osd_op *op = (void *)(reqhead + 1);
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u64 orig_len = *plen;
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u64 objoff, objlen; /* extent in object */
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u64 bno;
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reqhead->snapid = cpu_to_le64(vino.snap);
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/* object extent? */
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ceph_calc_file_object_mapping(layout, off, plen, &bno,
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&objoff, &objlen);
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if (*plen < orig_len)
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dout(" skipping last %llu, final file extent %llu~%llu\n",
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orig_len - *plen, off, *plen);
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sprintf(req->r_oid, "%llx.%08llx", vino.ino, bno);
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req->r_oid_len = strlen(req->r_oid);
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op->extent.offset = cpu_to_le64(objoff);
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op->extent.length = cpu_to_le64(objlen);
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req->r_num_pages = calc_pages_for(off, *plen);
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dout("calc_layout %s (%d) %llu~%llu (%d pages)\n",
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req->r_oid, req->r_oid_len, objoff, objlen, req->r_num_pages);
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}
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/*
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* requests
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*/
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2009-12-07 22:37:03 +01:00
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void ceph_osdc_release_request(struct kref *kref)
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2009-10-06 20:31:10 +02:00
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{
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2009-12-07 22:37:03 +01:00
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struct ceph_osd_request *req = container_of(kref,
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struct ceph_osd_request,
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r_kref);
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if (req->r_request)
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ceph_msg_put(req->r_request);
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if (req->r_reply)
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ceph_msg_put(req->r_reply);
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2009-12-22 19:45:45 +01:00
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if (req->r_con_filling_pages) {
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dout("release_request revoking pages %p from con %p\n",
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req->r_pages, req->r_con_filling_pages);
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ceph_con_revoke_pages(req->r_con_filling_pages,
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req->r_pages);
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ceph_con_put(req->r_con_filling_pages);
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}
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2009-12-07 22:37:03 +01:00
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if (req->r_own_pages)
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ceph_release_page_vector(req->r_pages,
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req->r_num_pages);
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ceph_put_snap_context(req->r_snapc);
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if (req->r_mempool)
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mempool_free(req, req->r_osdc->req_mempool);
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else
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kfree(req);
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2009-10-06 20:31:10 +02:00
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}
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/*
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* build new request AND message, calculate layout, and adjust file
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* extent as needed.
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*
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* if the file was recently truncated, we include information about its
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* old and new size so that the object can be updated appropriately. (we
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* avoid synchronously deleting truncated objects because it's slow.)
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*
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* if @do_sync, include a 'startsync' command so that the osd will flush
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* data quickly.
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*/
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struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
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struct ceph_file_layout *layout,
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struct ceph_vino vino,
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u64 off, u64 *plen,
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int opcode, int flags,
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struct ceph_snap_context *snapc,
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int do_sync,
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u32 truncate_seq,
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u64 truncate_size,
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struct timespec *mtime,
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bool use_mempool, int num_reply)
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{
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struct ceph_osd_request *req;
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struct ceph_msg *msg;
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struct ceph_osd_request_head *head;
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struct ceph_osd_op *op;
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void *p;
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int do_trunc = truncate_seq && (off + *plen > truncate_size);
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int num_op = 1 + do_sync + do_trunc;
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size_t msg_size = sizeof(*head) + num_op*sizeof(*op);
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int err, i;
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u64 prevofs;
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if (use_mempool) {
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req = mempool_alloc(osdc->req_mempool, GFP_NOFS);
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memset(req, 0, sizeof(*req));
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} else {
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req = kzalloc(sizeof(*req), GFP_NOFS);
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}
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if (req == NULL)
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return ERR_PTR(-ENOMEM);
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err = ceph_msgpool_resv(&osdc->msgpool_op_reply, num_reply);
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if (err) {
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ceph_osdc_put_request(req);
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return ERR_PTR(-ENOMEM);
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}
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2009-12-15 18:50:36 +01:00
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req->r_num_prealloc_reply = num_reply;
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2009-10-06 20:31:10 +02:00
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req->r_osdc = osdc;
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req->r_mempool = use_mempool;
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2009-12-07 22:37:03 +01:00
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kref_init(&req->r_kref);
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2009-10-06 20:31:10 +02:00
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init_completion(&req->r_completion);
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init_completion(&req->r_safe_completion);
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INIT_LIST_HEAD(&req->r_unsafe_item);
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req->r_flags = flags;
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WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0);
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/* create message; allow space for oid */
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msg_size += 40;
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if (snapc)
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msg_size += sizeof(u64) * snapc->num_snaps;
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if (use_mempool)
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2009-10-15 02:36:07 +02:00
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msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
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2009-10-06 20:31:10 +02:00
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else
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msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, 0, 0, NULL);
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if (IS_ERR(msg)) {
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2009-12-15 18:50:36 +01:00
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ceph_msgpool_resv(&osdc->msgpool_op_reply, -num_reply);
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2009-10-06 20:31:10 +02:00
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ceph_osdc_put_request(req);
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return ERR_PTR(PTR_ERR(msg));
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}
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msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP);
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memset(msg->front.iov_base, 0, msg->front.iov_len);
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head = msg->front.iov_base;
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op = (void *)(head + 1);
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p = (void *)(op + num_op);
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req->r_request = msg;
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req->r_snapc = ceph_get_snap_context(snapc);
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head->client_inc = cpu_to_le32(1); /* always, for now. */
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head->flags = cpu_to_le32(flags);
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if (flags & CEPH_OSD_FLAG_WRITE)
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ceph_encode_timespec(&head->mtime, mtime);
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head->num_ops = cpu_to_le16(num_op);
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op->op = cpu_to_le16(opcode);
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/* calculate max write size */
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calc_layout(osdc, vino, layout, off, plen, req);
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req->r_file_layout = *layout; /* keep a copy */
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if (flags & CEPH_OSD_FLAG_WRITE) {
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req->r_request->hdr.data_off = cpu_to_le16(off);
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req->r_request->hdr.data_len = cpu_to_le32(*plen);
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op->payload_len = cpu_to_le32(*plen);
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}
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/* fill in oid */
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head->object_len = cpu_to_le32(req->r_oid_len);
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memcpy(p, req->r_oid, req->r_oid_len);
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p += req->r_oid_len;
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/* additional ops */
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if (do_trunc) {
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op++;
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op->op = cpu_to_le16(opcode == CEPH_OSD_OP_READ ?
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CEPH_OSD_OP_MASKTRUNC : CEPH_OSD_OP_SETTRUNC);
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op->trunc.truncate_seq = cpu_to_le32(truncate_seq);
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prevofs = le64_to_cpu((op-1)->extent.offset);
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op->trunc.truncate_size = cpu_to_le64(truncate_size -
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(off-prevofs));
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}
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if (do_sync) {
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op++;
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op->op = cpu_to_le16(CEPH_OSD_OP_STARTSYNC);
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}
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if (snapc) {
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head->snap_seq = cpu_to_le64(snapc->seq);
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head->num_snaps = cpu_to_le32(snapc->num_snaps);
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for (i = 0; i < snapc->num_snaps; i++) {
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put_unaligned_le64(snapc->snaps[i], p);
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p += sizeof(u64);
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}
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}
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BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
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return req;
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}
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/*
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* We keep osd requests in an rbtree, sorted by ->r_tid.
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*/
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static void __insert_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *new)
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{
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struct rb_node **p = &osdc->requests.rb_node;
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struct rb_node *parent = NULL;
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struct ceph_osd_request *req = NULL;
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while (*p) {
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parent = *p;
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req = rb_entry(parent, struct ceph_osd_request, r_node);
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if (new->r_tid < req->r_tid)
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p = &(*p)->rb_left;
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else if (new->r_tid > req->r_tid)
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p = &(*p)->rb_right;
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else
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BUG();
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}
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rb_link_node(&new->r_node, parent, p);
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rb_insert_color(&new->r_node, &osdc->requests);
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}
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static struct ceph_osd_request *__lookup_request(struct ceph_osd_client *osdc,
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u64 tid)
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{
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struct ceph_osd_request *req;
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struct rb_node *n = osdc->requests.rb_node;
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while (n) {
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req = rb_entry(n, struct ceph_osd_request, r_node);
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if (tid < req->r_tid)
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n = n->rb_left;
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else if (tid > req->r_tid)
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n = n->rb_right;
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else
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return req;
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}
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return NULL;
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}
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static struct ceph_osd_request *
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__lookup_request_ge(struct ceph_osd_client *osdc,
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u64 tid)
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{
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struct ceph_osd_request *req;
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struct rb_node *n = osdc->requests.rb_node;
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while (n) {
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req = rb_entry(n, struct ceph_osd_request, r_node);
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if (tid < req->r_tid) {
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if (!n->rb_left)
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return req;
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n = n->rb_left;
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} else if (tid > req->r_tid) {
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n = n->rb_right;
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} else {
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return req;
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}
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}
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return NULL;
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}
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/*
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2009-10-09 19:29:18 +02:00
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* If the osd connection drops, we need to resubmit all requests.
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2009-10-06 20:31:10 +02:00
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*/
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static void osd_reset(struct ceph_connection *con)
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{
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struct ceph_osd *osd = con->private;
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struct ceph_osd_client *osdc;
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if (!osd)
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return;
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dout("osd_reset osd%d\n", osd->o_osd);
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osdc = osd->o_osdc;
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osd->o_incarnation++;
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down_read(&osdc->map_sem);
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kick_requests(osdc, osd);
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up_read(&osdc->map_sem);
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}
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/*
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* Track open sessions with osds.
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*/
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static struct ceph_osd *create_osd(struct ceph_osd_client *osdc)
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{
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struct ceph_osd *osd;
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osd = kzalloc(sizeof(*osd), GFP_NOFS);
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if (!osd)
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return NULL;
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atomic_set(&osd->o_ref, 1);
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osd->o_osdc = osdc;
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INIT_LIST_HEAD(&osd->o_requests);
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osd->o_incarnation = 1;
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ceph_con_init(osdc->client->msgr, &osd->o_con);
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osd->o_con.private = osd;
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osd->o_con.ops = &osd_con_ops;
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|
|
osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD;
|
2009-11-19 01:19:57 +01:00
|
|
|
|
2009-10-06 20:31:10 +02:00
|
|
|
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);
|
2009-11-18 20:22:36 +01:00
|
|
|
if (atomic_dec_and_test(&osd->o_ref))
|
2009-10-06 20:31:10 +02:00
|
|
|
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);
|
|
|
|
ceph_con_close(&osd->o_con);
|
|
|
|
put_osd(osd);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* reset osd connect
|
|
|
|
*/
|
|
|
|
static int reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
|
|
|
|
{
|
|
|
|
int ret = 0;
|
|
|
|
|
|
|
|
dout("reset_osd %p osd%d\n", osd, osd->o_osd);
|
|
|
|
if (list_empty(&osd->o_requests)) {
|
|
|
|
remove_osd(osdc, osd);
|
|
|
|
} else {
|
|
|
|
ceph_con_close(&osd->o_con);
|
|
|
|
ceph_con_open(&osd->o_con, &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;
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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)
|
|
|
|
{
|
|
|
|
mutex_lock(&osdc->request_mutex);
|
|
|
|
req->r_tid = ++osdc->last_tid;
|
2009-12-22 20:24:33 +01:00
|
|
|
req->r_request->hdr.tid = cpu_to_le64(req->r_tid);
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
dout("register_request %p tid %lld\n", req, req->r_tid);
|
|
|
|
__insert_request(osdc, req);
|
|
|
|
ceph_osdc_get_request(req);
|
|
|
|
osdc->num_requests++;
|
|
|
|
|
|
|
|
req->r_timeout_stamp =
|
2009-10-27 19:50:50 +01:00
|
|
|
jiffies + osdc->client->mount_args->osd_timeout*HZ;
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
if (osdc->num_requests == 1) {
|
|
|
|
osdc->timeout_tid = req->r_tid;
|
|
|
|
dout(" timeout on tid %llu at %lu\n", req->r_tid,
|
|
|
|
req->r_timeout_stamp);
|
|
|
|
schedule_delayed_work(&osdc->timeout_work,
|
|
|
|
round_jiffies_relative(req->r_timeout_stamp - jiffies));
|
|
|
|
}
|
|
|
|
mutex_unlock(&osdc->request_mutex);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* called under osdc->request_mutex
|
|
|
|
*/
|
|
|
|
static void __unregister_request(struct ceph_osd_client *osdc,
|
|
|
|
struct ceph_osd_request *req)
|
|
|
|
{
|
|
|
|
dout("__unregister_request %p tid %lld\n", req, req->r_tid);
|
|
|
|
rb_erase(&req->r_node, &osdc->requests);
|
|
|
|
osdc->num_requests--;
|
|
|
|
|
2009-12-15 18:50:36 +01:00
|
|
|
ceph_msgpool_resv(&osdc->msgpool_op_reply, -req->r_num_prealloc_reply);
|
|
|
|
|
2009-10-09 01:57:16 +02:00
|
|
|
if (req->r_osd) {
|
|
|
|
/* make sure the original request isn't in flight. */
|
|
|
|
ceph_con_revoke(&req->r_osd->o_con, req->r_request);
|
|
|
|
|
|
|
|
list_del_init(&req->r_osd_item);
|
|
|
|
if (list_empty(&req->r_osd->o_requests))
|
|
|
|
remove_osd(osdc, req->r_osd);
|
|
|
|
req->r_osd = NULL;
|
|
|
|
}
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
ceph_osdc_put_request(req);
|
|
|
|
|
|
|
|
if (req->r_tid == osdc->timeout_tid) {
|
|
|
|
if (osdc->num_requests == 0) {
|
|
|
|
dout("no requests, canceling timeout\n");
|
|
|
|
osdc->timeout_tid = 0;
|
|
|
|
cancel_delayed_work(&osdc->timeout_work);
|
|
|
|
} else {
|
|
|
|
req = rb_entry(rb_first(&osdc->requests),
|
|
|
|
struct ceph_osd_request, r_node);
|
|
|
|
osdc->timeout_tid = req->r_tid;
|
|
|
|
dout("rescheduled timeout on tid %llu at %lu\n",
|
|
|
|
req->r_tid, req->r_timeout_stamp);
|
|
|
|
schedule_delayed_work(&osdc->timeout_work,
|
|
|
|
round_jiffies_relative(req->r_timeout_stamp -
|
|
|
|
jiffies));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Cancel a previously queued request message
|
|
|
|
*/
|
|
|
|
static void __cancel_request(struct ceph_osd_request *req)
|
|
|
|
{
|
|
|
|
if (req->r_sent) {
|
|
|
|
ceph_con_revoke(&req->r_osd->o_con, req->r_request);
|
|
|
|
req->r_sent = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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.
|
|
|
|
*
|
|
|
|
* Return 0 if unchanged, 1 if changed, or negative on error.
|
|
|
|
*
|
|
|
|
* Caller should hold map_sem for read and request_mutex.
|
|
|
|
*/
|
|
|
|
static int __map_osds(struct ceph_osd_client *osdc,
|
|
|
|
struct ceph_osd_request *req)
|
|
|
|
{
|
|
|
|
struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
|
2009-11-04 20:39:12 +01:00
|
|
|
struct ceph_pg pgid;
|
2009-10-06 20:31:10 +02:00
|
|
|
int o = -1;
|
|
|
|
int err;
|
|
|
|
struct ceph_osd *newosd = NULL;
|
|
|
|
|
|
|
|
dout("map_osds %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)
|
|
|
|
return err;
|
2009-11-04 20:39:12 +01:00
|
|
|
pgid = reqhead->layout.ol_pgid;
|
2010-01-09 00:58:25 +01:00
|
|
|
req->r_pgid = pgid;
|
|
|
|
|
2009-10-06 20:31:10 +02:00
|
|
|
o = ceph_calc_pg_primary(osdc->osdmap, pgid);
|
|
|
|
|
|
|
|
if ((req->r_osd && req->r_osd->o_osd == o &&
|
|
|
|
req->r_sent >= req->r_osd->o_incarnation) ||
|
|
|
|
(req->r_osd == NULL && o == -1))
|
|
|
|
return 0; /* no change */
|
|
|
|
|
2009-11-04 20:39:12 +01:00
|
|
|
dout("map_osds 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,
|
2009-10-06 20:31:10 +02:00
|
|
|
req->r_osd ? req->r_osd->o_osd : -1);
|
|
|
|
|
|
|
|
if (req->r_osd) {
|
|
|
|
__cancel_request(req);
|
|
|
|
list_del_init(&req->r_osd_item);
|
|
|
|
if (list_empty(&req->r_osd->o_requests)) {
|
|
|
|
/* try to re-use r_osd if possible */
|
|
|
|
newosd = get_osd(req->r_osd);
|
|
|
|
remove_osd(osdc, newosd);
|
|
|
|
}
|
|
|
|
req->r_osd = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
req->r_osd = __lookup_osd(osdc, o);
|
|
|
|
if (!req->r_osd && o >= 0) {
|
|
|
|
if (newosd) {
|
|
|
|
req->r_osd = newosd;
|
|
|
|
newosd = NULL;
|
|
|
|
} else {
|
|
|
|
err = -ENOMEM;
|
|
|
|
req->r_osd = create_osd(osdc);
|
|
|
|
if (!req->r_osd)
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
dout("map_osds osd %p is osd%d\n", req->r_osd, o);
|
|
|
|
req->r_osd->o_osd = o;
|
|
|
|
req->r_osd->o_con.peer_name.num = cpu_to_le64(o);
|
|
|
|
__insert_osd(osdc, req->r_osd);
|
|
|
|
|
|
|
|
ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (req->r_osd)
|
|
|
|
list_add(&req->r_osd_item, &req->r_osd->o_requests);
|
|
|
|
err = 1; /* osd changed */
|
|
|
|
|
|
|
|
out:
|
|
|
|
if (newosd)
|
|
|
|
put_osd(newosd);
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* caller should hold map_sem (for read) and request_mutex
|
|
|
|
*/
|
|
|
|
static int __send_request(struct ceph_osd_client *osdc,
|
|
|
|
struct ceph_osd_request *req)
|
|
|
|
{
|
|
|
|
struct ceph_osd_request_head *reqhead;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = __map_osds(osdc, req);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
if (req->r_osd == NULL) {
|
|
|
|
dout("send_request %p no up osds in pg\n", req);
|
|
|
|
ceph_monc_request_next_osdmap(&osdc->client->monc);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
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;
|
|
|
|
|
2009-10-27 19:50:50 +01:00
|
|
|
req->r_timeout_stamp = jiffies+osdc->client->mount_args->osd_timeout*HZ;
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
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;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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;
|
2009-10-27 19:50:50 +01:00
|
|
|
unsigned long timeout = osdc->client->mount_args->osd_timeout * HZ;
|
2009-10-06 20:31:10 +02:00
|
|
|
unsigned long next_timeout = timeout + jiffies;
|
|
|
|
struct rb_node *p;
|
|
|
|
|
|
|
|
dout("timeout\n");
|
|
|
|
down_read(&osdc->map_sem);
|
|
|
|
|
|
|
|
ceph_monc_request_next_osdmap(&osdc->client->monc);
|
|
|
|
|
|
|
|
mutex_lock(&osdc->request_mutex);
|
|
|
|
for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
|
|
|
|
req = rb_entry(p, struct ceph_osd_request, r_node);
|
|
|
|
|
|
|
|
if (req->r_resend) {
|
|
|
|
int err;
|
|
|
|
|
|
|
|
dout("osdc resending prev failed %lld\n", req->r_tid);
|
|
|
|
err = __send_request(osdc, req);
|
|
|
|
if (err)
|
|
|
|
dout("osdc failed again on %lld\n", req->r_tid);
|
|
|
|
else
|
|
|
|
req->r_resend = false;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
for (p = rb_first(&osdc->osds); p; p = rb_next(p)) {
|
|
|
|
osd = rb_entry(p, struct ceph_osd, o_node);
|
|
|
|
if (list_empty(&osd->o_requests))
|
|
|
|
continue;
|
|
|
|
req = list_first_entry(&osd->o_requests,
|
|
|
|
struct ceph_osd_request, r_osd_item);
|
|
|
|
if (time_before(jiffies, req->r_timeout_stamp))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
dout(" tid %llu (at least) timed out on osd%d\n",
|
|
|
|
req->r_tid, osd->o_osd);
|
|
|
|
req->r_timeout_stamp = next_timeout;
|
|
|
|
ceph_con_keepalive(&osd->o_con);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (osdc->timeout_tid)
|
|
|
|
schedule_delayed_work(&osdc->timeout_work,
|
|
|
|
round_jiffies_relative(timeout));
|
|
|
|
|
|
|
|
mutex_unlock(&osdc->request_mutex);
|
|
|
|
|
|
|
|
up_read(&osdc->map_sem);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* handle osd op reply. either call the callback if it is specified,
|
|
|
|
* or do the completion to wake up the waiting thread.
|
|
|
|
*/
|
2009-12-22 19:45:45 +01:00
|
|
|
static void handle_reply(struct ceph_osd_client *osdc, struct ceph_msg *msg,
|
|
|
|
struct ceph_connection *con)
|
2009-10-06 20:31:10 +02:00
|
|
|
{
|
|
|
|
struct ceph_osd_reply_head *rhead = msg->front.iov_base;
|
|
|
|
struct ceph_osd_request *req;
|
|
|
|
u64 tid;
|
|
|
|
int numops, object_len, flags;
|
|
|
|
|
2009-12-22 20:24:33 +01:00
|
|
|
tid = le64_to_cpu(msg->hdr.tid);
|
2009-10-06 20:31:10 +02:00
|
|
|
if (msg->front.iov_len < sizeof(*rhead))
|
|
|
|
goto bad;
|
|
|
|
numops = le32_to_cpu(rhead->num_ops);
|
|
|
|
object_len = le32_to_cpu(rhead->object_len);
|
|
|
|
if (msg->front.iov_len != sizeof(*rhead) + object_len +
|
|
|
|
numops * sizeof(struct ceph_osd_op))
|
|
|
|
goto bad;
|
|
|
|
dout("handle_reply %p tid %llu\n", msg, tid);
|
|
|
|
|
|
|
|
/* 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);
|
|
|
|
|
2009-12-22 19:45:45 +01:00
|
|
|
/*
|
|
|
|
* if this connection filled our pages, drop our reference now, to
|
|
|
|
* avoid a (safe but slower) revoke later.
|
|
|
|
*/
|
|
|
|
if (req->r_con_filling_pages == con && req->r_pages == msg->pages) {
|
|
|
|
dout(" got pages, dropping con_filling_pages ref %p\n", con);
|
|
|
|
req->r_con_filling_pages = NULL;
|
|
|
|
ceph_con_put(con);
|
|
|
|
}
|
|
|
|
|
2009-10-06 20:31:10 +02:00
|
|
|
if (req->r_reply) {
|
|
|
|
/*
|
|
|
|
* once we see the message has been received, we don't
|
|
|
|
* need a ref (which is only needed for revoking
|
|
|
|
* pages)
|
|
|
|
*/
|
|
|
|
ceph_msg_put(req->r_reply);
|
|
|
|
req->r_reply = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
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);
|
2009-12-01 21:23:54 +01:00
|
|
|
mutex_unlock(&osdc->request_mutex);
|
2009-10-06 20:31:10 +02:00
|
|
|
goto done;
|
|
|
|
}
|
|
|
|
|
|
|
|
dout("handle_reply tid %llu flags %d\n", tid, flags);
|
|
|
|
|
|
|
|
/* either this is a read, or we got the safe response */
|
|
|
|
if ((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(&req->r_completion);
|
|
|
|
|
|
|
|
if (flags & CEPH_OSD_FLAG_ONDISK) {
|
|
|
|
if (req->r_safe_callback)
|
|
|
|
req->r_safe_callback(req, msg);
|
|
|
|
complete(&req->r_safe_completion); /* fsync waiter */
|
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
|
|
|
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));
|
2009-12-15 00:13:47 +01:00
|
|
|
ceph_msg_dump(msg);
|
2009-10-06 20:31:10 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Resubmit osd requests whose osd or osd address has changed. Request
|
|
|
|
* a new osd map if osds are down, or we are otherwise unable to determine
|
|
|
|
* how to direct a request.
|
|
|
|
*
|
|
|
|
* Close connections to down osds.
|
|
|
|
*
|
|
|
|
* If @who is specified, resubmit requests for that specific osd.
|
|
|
|
*
|
|
|
|
* Caller should hold map_sem for read and request_mutex.
|
|
|
|
*/
|
|
|
|
static void kick_requests(struct ceph_osd_client *osdc,
|
|
|
|
struct ceph_osd *kickosd)
|
|
|
|
{
|
|
|
|
struct ceph_osd_request *req;
|
|
|
|
struct rb_node *p, *n;
|
|
|
|
int needmap = 0;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
dout("kick_requests osd%d\n", kickosd ? kickosd->o_osd : -1);
|
|
|
|
mutex_lock(&osdc->request_mutex);
|
|
|
|
if (!kickosd) {
|
|
|
|
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) ||
|
2010-01-08 01:12:36 +01:00
|
|
|
memcmp(&osd->o_con.peer_addr,
|
|
|
|
ceph_osd_addr(osdc->osdmap,
|
|
|
|
osd->o_osd),
|
|
|
|
sizeof(struct ceph_entity_addr)) != 0)
|
2009-10-06 20:31:10 +02:00
|
|
|
reset_osd(osdc, osd);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for (p = rb_first(&osdc->requests); p; p = rb_next(p)) {
|
|
|
|
req = rb_entry(p, struct ceph_osd_request, r_node);
|
|
|
|
|
|
|
|
if (req->r_resend) {
|
|
|
|
dout(" r_resend set on tid %llu\n", req->r_tid);
|
2009-10-09 19:31:32 +02:00
|
|
|
__cancel_request(req);
|
2009-10-06 20:31:10 +02:00
|
|
|
goto kick;
|
|
|
|
}
|
2009-10-09 19:31:32 +02:00
|
|
|
if (req->r_osd && kickosd == req->r_osd) {
|
|
|
|
__cancel_request(req);
|
2009-10-06 20:31:10 +02:00
|
|
|
goto kick;
|
2009-10-09 19:31:32 +02:00
|
|
|
}
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
err = __map_osds(osdc, req);
|
|
|
|
if (err == 0)
|
|
|
|
continue; /* no change */
|
|
|
|
if (err < 0) {
|
|
|
|
/*
|
|
|
|
* FIXME: really, we should set the request
|
|
|
|
* error and fail if this isn't a 'nofail'
|
|
|
|
* request, but that's a fair bit more
|
|
|
|
* complicated to do. So retry!
|
|
|
|
*/
|
|
|
|
dout(" setting r_resend on %llu\n", req->r_tid);
|
|
|
|
req->r_resend = true;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (req->r_osd == NULL) {
|
|
|
|
dout("tid %llu maps to no valid osd\n", req->r_tid);
|
|
|
|
needmap++; /* request a newer map */
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
kick:
|
2009-10-09 01:55:47 +02:00
|
|
|
dout("kicking %p tid %llu osd%d\n", req, req->r_tid,
|
|
|
|
req->r_osd->o_osd);
|
2009-10-06 20:31:10 +02:00
|
|
|
req->r_flags |= CEPH_OSD_FLAG_RETRY;
|
|
|
|
err = __send_request(osdc, req);
|
|
|
|
if (err) {
|
|
|
|
dout(" setting r_resend on %llu\n", req->r_tid);
|
|
|
|
req->r_resend = true;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
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;
|
|
|
|
|
|
|
|
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));
|
2009-11-19 01:50:41 +01:00
|
|
|
if (ceph_check_fsid(osdc->client, &fsid) < 0)
|
|
|
|
return;
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
down_write(&osdc->map_sem);
|
|
|
|
|
|
|
|
/* 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);
|
2009-10-14 18:59:09 +02:00
|
|
|
epoch = ceph_decode_32(&p);
|
|
|
|
maplen = ceph_decode_32(&p);
|
2009-10-06 20:31:10 +02:00
|
|
|
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;
|
|
|
|
}
|
2009-12-21 23:49:37 +01:00
|
|
|
BUG_ON(!newmap);
|
2009-10-06 20:31:10 +02:00
|
|
|
if (newmap != osdc->osdmap) {
|
|
|
|
ceph_osdmap_destroy(osdc->osdmap);
|
|
|
|
osdc->osdmap = newmap;
|
|
|
|
}
|
|
|
|
} 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);
|
2009-10-14 18:59:09 +02:00
|
|
|
epoch = ceph_decode_32(&p);
|
|
|
|
maplen = ceph_decode_32(&p);
|
2009-10-06 20:31:10 +02:00
|
|
|
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 {
|
|
|
|
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;
|
|
|
|
}
|
2009-12-21 23:49:37 +01:00
|
|
|
BUG_ON(!newmap);
|
2009-10-06 20:31:10 +02:00
|
|
|
oldmap = osdc->osdmap;
|
|
|
|
osdc->osdmap = newmap;
|
|
|
|
if (oldmap)
|
|
|
|
ceph_osdmap_destroy(oldmap);
|
|
|
|
}
|
|
|
|
p += maplen;
|
|
|
|
nr_maps--;
|
|
|
|
}
|
|
|
|
|
|
|
|
done:
|
|
|
|
downgrade_write(&osdc->map_sem);
|
|
|
|
ceph_monc_got_osdmap(&osdc->client->monc, osdc->osdmap->epoch);
|
|
|
|
if (newmap)
|
|
|
|
kick_requests(osdc, NULL);
|
|
|
|
up_read(&osdc->map_sem);
|
|
|
|
return;
|
|
|
|
|
|
|
|
bad:
|
|
|
|
pr_err("osdc handle_map corrupt msg\n");
|
2009-12-15 00:13:47 +01:00
|
|
|
ceph_msg_dump(msg);
|
2009-10-06 20:31:10 +02:00
|
|
|
up_write(&osdc->map_sem);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* A read request prepares specific pages that data is to be read into.
|
|
|
|
* When a message is being read off the wire, we call prepare_pages to
|
|
|
|
* find those pages.
|
|
|
|
* 0 = success, -1 failure.
|
|
|
|
*/
|
|
|
|
static int prepare_pages(struct ceph_connection *con, struct ceph_msg *m,
|
|
|
|
int want)
|
|
|
|
{
|
|
|
|
struct ceph_osd *osd = con->private;
|
|
|
|
struct ceph_osd_client *osdc;
|
|
|
|
struct ceph_osd_request *req;
|
|
|
|
u64 tid;
|
|
|
|
int ret = -1;
|
|
|
|
int type = le16_to_cpu(m->hdr.type);
|
|
|
|
|
|
|
|
if (!osd)
|
|
|
|
return -1;
|
|
|
|
osdc = osd->o_osdc;
|
|
|
|
|
|
|
|
dout("prepare_pages on msg %p want %d\n", m, want);
|
|
|
|
if (unlikely(type != CEPH_MSG_OSD_OPREPLY))
|
|
|
|
return -1; /* hmm! */
|
|
|
|
|
2009-12-22 20:24:33 +01:00
|
|
|
tid = le64_to_cpu(m->hdr.tid);
|
2009-10-06 20:31:10 +02:00
|
|
|
mutex_lock(&osdc->request_mutex);
|
|
|
|
req = __lookup_request(osdc, tid);
|
|
|
|
if (!req) {
|
|
|
|
dout("prepare_pages unknown tid %llu\n", tid);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
dout("prepare_pages tid %llu has %d pages, want %d\n",
|
|
|
|
tid, req->r_num_pages, want);
|
2009-12-22 19:45:45 +01:00
|
|
|
if (unlikely(req->r_num_pages < want))
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
if (req->r_con_filling_pages) {
|
|
|
|
dout("revoking pages %p from old con %p\n", req->r_pages,
|
|
|
|
req->r_con_filling_pages);
|
|
|
|
ceph_con_revoke_pages(req->r_con_filling_pages, req->r_pages);
|
|
|
|
ceph_con_put(req->r_con_filling_pages);
|
2009-10-06 20:31:10 +02:00
|
|
|
}
|
2009-12-22 19:45:45 +01:00
|
|
|
req->r_con_filling_pages = ceph_con_get(con);
|
|
|
|
req->r_reply = ceph_msg_get(m); /* for duration of read over socket */
|
|
|
|
m->pages = req->r_pages;
|
|
|
|
m->nr_pages = req->r_num_pages;
|
|
|
|
ret = 0; /* success */
|
2009-10-06 20:31:10 +02:00
|
|
|
out:
|
|
|
|
mutex_unlock(&osdc->request_mutex);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Register request, send initial attempt.
|
|
|
|
*/
|
|
|
|
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
|
|
|
|
struct ceph_osd_request *req,
|
|
|
|
bool nofail)
|
|
|
|
{
|
2009-10-09 01:55:47 +02:00
|
|
|
int rc = 0;
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
req->r_request->pages = req->r_pages;
|
|
|
|
req->r_request->nr_pages = req->r_num_pages;
|
|
|
|
|
|
|
|
register_request(osdc, req);
|
|
|
|
|
|
|
|
down_read(&osdc->map_sem);
|
|
|
|
mutex_lock(&osdc->request_mutex);
|
2009-10-09 01:55:47 +02:00
|
|
|
/*
|
|
|
|
* 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 = __send_request(osdc, req);
|
|
|
|
if (rc) {
|
|
|
|
if (nofail) {
|
|
|
|
dout("osdc_start_request failed send, "
|
|
|
|
" marking %lld\n", req->r_tid);
|
|
|
|
req->r_resend = true;
|
|
|
|
rc = 0;
|
|
|
|
} else {
|
|
|
|
__unregister_request(osdc, req);
|
|
|
|
}
|
2009-10-06 20:31:10 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
mutex_unlock(&osdc->request_mutex);
|
|
|
|
up_read(&osdc->map_sem);
|
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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);
|
2009-12-22 19:29:39 +01:00
|
|
|
__unregister_request(osdc, req);
|
2009-10-06 20:31:10 +02:00
|
|
|
mutex_unlock(&osdc->request_mutex);
|
2009-12-22 19:29:39 +01:00
|
|
|
dout("wait_request tid %llu canceled/timed out\n", req->r_tid);
|
2009-10-06 20:31:10 +02:00
|
|
|
return rc;
|
|
|
|
}
|
|
|
|
|
|
|
|
dout("wait_request tid %llu result %d\n", req->r_tid, req->r_result);
|
|
|
|
return req->r_result;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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->timeout_tid = 0;
|
|
|
|
osdc->last_tid = 0;
|
|
|
|
osdc->osds = RB_ROOT;
|
|
|
|
osdc->requests = RB_ROOT;
|
|
|
|
osdc->num_requests = 0;
|
|
|
|
INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
|
|
|
|
|
2009-11-18 23:52:18 +01:00
|
|
|
err = -ENOMEM;
|
2009-10-06 20:31:10 +02:00
|
|
|
osdc->req_mempool = mempool_create_kmalloc_pool(10,
|
|
|
|
sizeof(struct ceph_osd_request));
|
|
|
|
if (!osdc->req_mempool)
|
2009-11-18 23:52:18 +01:00
|
|
|
goto out;
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
err = ceph_msgpool_init(&osdc->msgpool_op, 4096, 10, true);
|
|
|
|
if (err < 0)
|
2009-11-18 23:52:18 +01:00
|
|
|
goto out_mempool;
|
2009-10-06 20:31:10 +02:00
|
|
|
err = ceph_msgpool_init(&osdc->msgpool_op_reply, 512, 0, false);
|
|
|
|
if (err < 0)
|
2009-11-18 23:52:18 +01:00
|
|
|
goto out_msgpool;
|
2009-10-06 20:31:10 +02:00
|
|
|
return 0;
|
2009-11-18 23:52:18 +01:00
|
|
|
|
|
|
|
out_msgpool:
|
|
|
|
ceph_msgpool_destroy(&osdc->msgpool_op);
|
|
|
|
out_mempool:
|
|
|
|
mempool_destroy(osdc->req_mempool);
|
|
|
|
out:
|
|
|
|
return err;
|
2009-10-06 20:31:10 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
void ceph_osdc_stop(struct ceph_osd_client *osdc)
|
|
|
|
{
|
|
|
|
cancel_delayed_work_sync(&osdc->timeout_work);
|
|
|
|
if (osdc->osdmap) {
|
|
|
|
ceph_osdmap_destroy(osdc->osdmap);
|
|
|
|
osdc->osdmap = NULL;
|
|
|
|
}
|
|
|
|
mempool_destroy(osdc->req_mempool);
|
|
|
|
ceph_msgpool_destroy(&osdc->msgpool_op);
|
|
|
|
ceph_msgpool_destroy(&osdc->msgpool_op_reply);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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)
|
|
|
|
{
|
|
|
|
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);
|
|
|
|
if (IS_ERR(req))
|
|
|
|
return PTR_ERR(req);
|
|
|
|
|
|
|
|
/* it may be a short read due to an object boundary */
|
|
|
|
req->r_pages = pages;
|
|
|
|
num_pages = calc_pages_for(off, *plen);
|
|
|
|
req->r_num_pages = num_pages;
|
|
|
|
|
|
|
|
dout("readpages final extent is %llu~%llu (%d pages)\n",
|
|
|
|
off, *plen, req->r_num_pages);
|
|
|
|
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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;
|
|
|
|
|
|
|
|
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);
|
|
|
|
if (IS_ERR(req))
|
|
|
|
return PTR_ERR(req);
|
|
|
|
|
|
|
|
/* it may be a short write due to an object boundary */
|
|
|
|
req->r_pages = pages;
|
|
|
|
req->r_num_pages = calc_pages_for(off, len);
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* handle incoming message
|
|
|
|
*/
|
|
|
|
static void dispatch(struct ceph_connection *con, struct ceph_msg *msg)
|
|
|
|
{
|
|
|
|
struct ceph_osd *osd = con->private;
|
2009-11-21 16:53:16 +01:00
|
|
|
struct ceph_osd_client *osdc;
|
2009-10-06 20:31:10 +02:00
|
|
|
int type = le16_to_cpu(msg->hdr.type);
|
|
|
|
|
|
|
|
if (!osd)
|
|
|
|
return;
|
2009-11-21 16:53:16 +01:00
|
|
|
osdc = osd->o_osdc;
|
2009-10-06 20:31:10 +02:00
|
|
|
|
|
|
|
switch (type) {
|
|
|
|
case CEPH_MSG_OSD_MAP:
|
|
|
|
ceph_osdc_handle_map(osdc, msg);
|
|
|
|
break;
|
|
|
|
case CEPH_MSG_OSD_OPREPLY:
|
2009-12-22 19:45:45 +01:00
|
|
|
handle_reply(osdc, msg, con);
|
2009-10-06 20:31:10 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
pr_err("received unknown message type %d %s\n", type,
|
|
|
|
ceph_msg_type_name(type));
|
|
|
|
}
|
|
|
|
ceph_msg_put(msg);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct ceph_msg *alloc_msg(struct ceph_connection *con,
|
2010-01-08 22:58:34 +01:00
|
|
|
struct ceph_msg_header *hdr,
|
|
|
|
int *skip)
|
2009-10-06 20:31:10 +02:00
|
|
|
{
|
|
|
|
struct ceph_osd *osd = con->private;
|
|
|
|
struct ceph_osd_client *osdc = osd->o_osdc;
|
|
|
|
int type = le16_to_cpu(hdr->type);
|
2009-10-15 02:36:07 +02:00
|
|
|
int front = le32_to_cpu(hdr->front_len);
|
2010-01-08 22:58:34 +01:00
|
|
|
struct ceph_msg *m;
|
2009-10-06 20:31:10 +02:00
|
|
|
|
2010-01-08 22:58:34 +01:00
|
|
|
*skip = 0;
|
2009-10-06 20:31:10 +02:00
|
|
|
switch (type) {
|
|
|
|
case CEPH_MSG_OSD_OPREPLY:
|
2010-01-08 22:58:34 +01:00
|
|
|
m = ceph_msgpool_get(&osdc->msgpool_op_reply, front);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return NULL;
|
2009-10-06 20:31:10 +02:00
|
|
|
}
|
2010-01-08 22:58:34 +01:00
|
|
|
|
|
|
|
if (!m)
|
|
|
|
*skip = 1;
|
|
|
|
|
|
|
|
return m;
|
2009-10-06 20:31:10 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* 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);
|
|
|
|
}
|
|
|
|
|
2009-11-19 01:19:57 +01:00
|
|
|
/*
|
|
|
|
* authentication
|
|
|
|
*/
|
|
|
|
static int get_authorizer(struct ceph_connection *con,
|
2009-12-01 23:12:07 +01:00
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void **buf, int *len, int *proto,
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void **reply_buf, int *reply_len, int force_new)
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2009-11-19 01:19:57 +01:00
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{
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struct ceph_osd *o = con->private;
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struct ceph_osd_client *osdc = o->o_osdc;
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struct ceph_auth_client *ac = osdc->client->monc.auth;
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int ret = 0;
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if (force_new && o->o_authorizer) {
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ac->ops->destroy_authorizer(ac, o->o_authorizer);
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o->o_authorizer = NULL;
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}
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if (o->o_authorizer == NULL) {
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ret = ac->ops->create_authorizer(
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ac, CEPH_ENTITY_TYPE_OSD,
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&o->o_authorizer,
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&o->o_authorizer_buf,
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&o->o_authorizer_buf_len,
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&o->o_authorizer_reply_buf,
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&o->o_authorizer_reply_buf_len);
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if (ret)
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return ret;
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}
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*proto = ac->protocol;
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*buf = o->o_authorizer_buf;
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*len = o->o_authorizer_buf_len;
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*reply_buf = o->o_authorizer_reply_buf;
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*reply_len = o->o_authorizer_reply_buf_len;
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return 0;
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}
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static int verify_authorizer_reply(struct ceph_connection *con, int len)
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{
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struct ceph_osd *o = con->private;
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struct ceph_osd_client *osdc = o->o_osdc;
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struct ceph_auth_client *ac = osdc->client->monc.auth;
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return ac->ops->verify_authorizer_reply(ac, o->o_authorizer, len);
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}
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2009-10-06 20:31:10 +02:00
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const static struct ceph_connection_operations osd_con_ops = {
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.get = get_osd_con,
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.put = put_osd_con,
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.dispatch = dispatch,
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2009-11-19 01:19:57 +01:00
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.get_authorizer = get_authorizer,
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.verify_authorizer_reply = verify_authorizer_reply,
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2009-10-06 20:31:10 +02:00
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.alloc_msg = alloc_msg,
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2009-10-09 19:29:18 +02:00
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.fault = osd_reset,
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2009-10-06 20:31:10 +02:00
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.prepare_pages = prepare_pages,
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};
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