![Sage Weil](/assets/img/avatar_default.png)
The r_req_lru_item list node moves between several lists, and that cycle is not directly related (and does not begin) with __register_request(). Initialize it in the request constructor, not __register_request(). This fixes later badness (below) when OSDs restart underneath an rbd mount. Crashes we've seen due to this include: [ 213.974288] kernel BUG at net/ceph/messenger.c:2193! and [ 144.035274] BUG: unable to handle kernel NULL pointer dereference at 0000000000000048 [ 144.035278] IP: [<ffffffffa036c053>] con_work+0x1463/0x2ce0 [libceph] Signed-off-by: Sage Weil <sage@newdream.net>
2179 lines
56 KiB
C
2179 lines
56 KiB
C
#include <linux/ceph/ceph_debug.h>
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#include <linux/module.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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#ifdef CONFIG_BLOCK
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#include <linux/bio.h>
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#endif
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#include <linux/ceph/libceph.h>
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#include <linux/ceph/osd_client.h>
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#include <linux/ceph/messenger.h>
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#include <linux/ceph/decode.h>
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#include <linux/ceph/auth.h>
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#include <linux/ceph/pagelist.h>
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#define OSD_OP_FRONT_LEN 4096
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#define OSD_OPREPLY_FRONT_LEN 512
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static const struct ceph_connection_operations osd_con_ops;
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static void send_queued(struct ceph_osd_client *osdc);
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static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
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static void __register_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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static void __unregister_linger_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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static int __send_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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static int op_needs_trail(int op)
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{
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switch (op) {
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case CEPH_OSD_OP_GETXATTR:
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case CEPH_OSD_OP_SETXATTR:
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case CEPH_OSD_OP_CMPXATTR:
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case CEPH_OSD_OP_CALL:
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case CEPH_OSD_OP_NOTIFY:
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return 1;
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default:
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return 0;
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}
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}
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static int op_has_extent(int op)
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{
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return (op == CEPH_OSD_OP_READ ||
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op == CEPH_OSD_OP_WRITE);
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}
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void ceph_calc_raw_layout(struct ceph_osd_client *osdc,
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struct ceph_file_layout *layout,
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u64 snapid,
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u64 off, u64 *plen, u64 *bno,
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struct ceph_osd_request *req,
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struct ceph_osd_req_op *op)
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{
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struct ceph_osd_request_head *reqhead = req->r_request->front.iov_base;
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u64 orig_len = *plen;
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u64 objoff, objlen; /* extent in object */
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reqhead->snapid = cpu_to_le64(snapid);
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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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if (op_has_extent(op->op)) {
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op->extent.offset = objoff;
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op->extent.length = objlen;
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}
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req->r_num_pages = calc_pages_for(off, *plen);
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req->r_page_alignment = off & ~PAGE_MASK;
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if (op->op == CEPH_OSD_OP_WRITE)
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op->payload_len = *plen;
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dout("calc_layout bno=%llx %llu~%llu (%d pages)\n",
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*bno, objoff, objlen, req->r_num_pages);
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}
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EXPORT_SYMBOL(ceph_calc_raw_layout);
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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,
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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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struct ceph_osd_req_op *op)
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{
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u64 bno;
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ceph_calc_raw_layout(osdc, layout, vino.snap, off,
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plen, &bno, req, op);
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snprintf(req->r_oid, sizeof(req->r_oid), "%llx.%08llx", vino.ino, bno);
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req->r_oid_len = strlen(req->r_oid);
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}
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/*
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* requests
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*/
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void ceph_osdc_release_request(struct kref *kref)
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{
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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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if (req->r_con_filling_msg) {
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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_msg);
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ceph_con_revoke_message(req->r_con_filling_msg,
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req->r_reply);
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ceph_con_put(req->r_con_filling_msg);
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}
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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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#ifdef CONFIG_BLOCK
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if (req->r_bio)
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bio_put(req->r_bio);
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#endif
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ceph_put_snap_context(req->r_snapc);
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if (req->r_trail) {
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ceph_pagelist_release(req->r_trail);
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kfree(req->r_trail);
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}
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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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}
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EXPORT_SYMBOL(ceph_osdc_release_request);
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static int get_num_ops(struct ceph_osd_req_op *ops, int *needs_trail)
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{
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int i = 0;
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if (needs_trail)
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*needs_trail = 0;
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while (ops[i].op) {
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if (needs_trail && op_needs_trail(ops[i].op))
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*needs_trail = 1;
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i++;
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}
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return i;
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}
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struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
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int flags,
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struct ceph_snap_context *snapc,
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struct ceph_osd_req_op *ops,
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bool use_mempool,
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gfp_t gfp_flags,
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struct page **pages,
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struct bio *bio)
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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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int needs_trail;
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int num_op = get_num_ops(ops, &needs_trail);
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size_t msg_size = sizeof(struct ceph_osd_request_head);
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msg_size += num_op*sizeof(struct ceph_osd_op);
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if (use_mempool) {
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req = mempool_alloc(osdc->req_mempool, gfp_flags);
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memset(req, 0, sizeof(*req));
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} else {
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req = kzalloc(sizeof(*req), gfp_flags);
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}
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if (req == NULL)
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return NULL;
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req->r_osdc = osdc;
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req->r_mempool = use_mempool;
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kref_init(&req->r_kref);
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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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INIT_LIST_HEAD(&req->r_linger_item);
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INIT_LIST_HEAD(&req->r_linger_osd);
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INIT_LIST_HEAD(&req->r_req_lru_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 reply message */
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if (use_mempool)
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msg = ceph_msgpool_get(&osdc->msgpool_op_reply, 0);
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else
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msg = ceph_msg_new(CEPH_MSG_OSD_OPREPLY,
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OSD_OPREPLY_FRONT_LEN, gfp_flags);
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if (!msg) {
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ceph_osdc_put_request(req);
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return NULL;
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}
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req->r_reply = msg;
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/* allocate space for the trailing data */
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if (needs_trail) {
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req->r_trail = kmalloc(sizeof(struct ceph_pagelist), gfp_flags);
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if (!req->r_trail) {
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ceph_osdc_put_request(req);
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return NULL;
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}
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ceph_pagelist_init(req->r_trail);
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}
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/* create request 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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msg = ceph_msgpool_get(&osdc->msgpool_op, 0);
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else
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msg = ceph_msg_new(CEPH_MSG_OSD_OP, msg_size, gfp_flags);
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if (!msg) {
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ceph_osdc_put_request(req);
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return NULL;
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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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req->r_request = msg;
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req->r_pages = pages;
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#ifdef CONFIG_BLOCK
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if (bio) {
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req->r_bio = bio;
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bio_get(req->r_bio);
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}
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#endif
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return req;
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}
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EXPORT_SYMBOL(ceph_osdc_alloc_request);
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static void osd_req_encode_op(struct ceph_osd_request *req,
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struct ceph_osd_op *dst,
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struct ceph_osd_req_op *src)
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{
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dst->op = cpu_to_le16(src->op);
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switch (dst->op) {
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case CEPH_OSD_OP_READ:
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case CEPH_OSD_OP_WRITE:
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dst->extent.offset =
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cpu_to_le64(src->extent.offset);
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dst->extent.length =
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cpu_to_le64(src->extent.length);
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dst->extent.truncate_size =
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cpu_to_le64(src->extent.truncate_size);
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dst->extent.truncate_seq =
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cpu_to_le32(src->extent.truncate_seq);
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break;
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case CEPH_OSD_OP_GETXATTR:
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case CEPH_OSD_OP_SETXATTR:
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case CEPH_OSD_OP_CMPXATTR:
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BUG_ON(!req->r_trail);
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dst->xattr.name_len = cpu_to_le32(src->xattr.name_len);
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dst->xattr.value_len = cpu_to_le32(src->xattr.value_len);
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dst->xattr.cmp_op = src->xattr.cmp_op;
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dst->xattr.cmp_mode = src->xattr.cmp_mode;
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ceph_pagelist_append(req->r_trail, src->xattr.name,
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src->xattr.name_len);
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ceph_pagelist_append(req->r_trail, src->xattr.val,
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src->xattr.value_len);
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break;
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case CEPH_OSD_OP_CALL:
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BUG_ON(!req->r_trail);
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dst->cls.class_len = src->cls.class_len;
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dst->cls.method_len = src->cls.method_len;
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dst->cls.indata_len = cpu_to_le32(src->cls.indata_len);
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ceph_pagelist_append(req->r_trail, src->cls.class_name,
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src->cls.class_len);
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ceph_pagelist_append(req->r_trail, src->cls.method_name,
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src->cls.method_len);
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ceph_pagelist_append(req->r_trail, src->cls.indata,
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src->cls.indata_len);
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break;
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case CEPH_OSD_OP_ROLLBACK:
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dst->snap.snapid = cpu_to_le64(src->snap.snapid);
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break;
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case CEPH_OSD_OP_STARTSYNC:
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break;
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case CEPH_OSD_OP_NOTIFY:
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{
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__le32 prot_ver = cpu_to_le32(src->watch.prot_ver);
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__le32 timeout = cpu_to_le32(src->watch.timeout);
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BUG_ON(!req->r_trail);
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ceph_pagelist_append(req->r_trail,
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&prot_ver, sizeof(prot_ver));
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ceph_pagelist_append(req->r_trail,
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&timeout, sizeof(timeout));
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}
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case CEPH_OSD_OP_NOTIFY_ACK:
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case CEPH_OSD_OP_WATCH:
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dst->watch.cookie = cpu_to_le64(src->watch.cookie);
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dst->watch.ver = cpu_to_le64(src->watch.ver);
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dst->watch.flag = src->watch.flag;
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break;
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default:
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pr_err("unrecognized osd opcode %d\n", dst->op);
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WARN_ON(1);
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break;
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}
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dst->payload_len = cpu_to_le32(src->payload_len);
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}
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/*
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* build new request AND message
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*
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*/
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void ceph_osdc_build_request(struct ceph_osd_request *req,
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u64 off, u64 *plen,
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struct ceph_osd_req_op *src_ops,
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struct ceph_snap_context *snapc,
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struct timespec *mtime,
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const char *oid,
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int oid_len)
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{
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struct ceph_msg *msg = req->r_request;
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struct ceph_osd_request_head *head;
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struct ceph_osd_req_op *src_op;
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struct ceph_osd_op *op;
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void *p;
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int num_op = get_num_ops(src_ops, NULL);
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size_t msg_size = sizeof(*head) + num_op*sizeof(*op);
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int flags = req->r_flags;
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u64 data_len = 0;
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int i;
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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_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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/* fill in oid */
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head->object_len = cpu_to_le32(oid_len);
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memcpy(p, oid, oid_len);
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p += oid_len;
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src_op = src_ops;
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while (src_op->op) {
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osd_req_encode_op(req, op, src_op);
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src_op++;
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op++;
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}
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if (req->r_trail)
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data_len += req->r_trail->length;
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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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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 + data_len);
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} else if (data_len) {
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req->r_request->hdr.data_off = 0;
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req->r_request->hdr.data_len = cpu_to_le32(data_len);
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}
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req->r_request->page_alignment = req->r_page_alignment;
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BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
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msg_size = p - msg->front.iov_base;
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msg->front.iov_len = msg_size;
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msg->hdr.front_len = cpu_to_le32(msg_size);
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return;
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}
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EXPORT_SYMBOL(ceph_osdc_build_request);
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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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int page_align)
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{
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struct ceph_osd_req_op ops[3];
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struct ceph_osd_request *req;
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ops[0].op = opcode;
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ops[0].extent.truncate_seq = truncate_seq;
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ops[0].extent.truncate_size = truncate_size;
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ops[0].payload_len = 0;
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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 NULL;
|
|
|
|
/* calculate max write size */
|
|
calc_layout(osdc, vino, layout, off, plen, req, ops);
|
|
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 == -EAGAIN)
|
|
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);
|
|
}
|
|
}
|
|
|
|
static void kick_osd_requests(struct ceph_osd_client *osdc,
|
|
struct ceph_osd *kickosd)
|
|
{
|
|
mutex_lock(&osdc->request_mutex);
|
|
__kick_osd_requests(osdc, kickosd);
|
|
mutex_unlock(&osdc->request_mutex);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
kick_osd_requests(osdc, osd);
|
|
send_queued(osdc);
|
|
up_read(&osdc->map_sem);
|
|
}
|
|
|
|
/*
|
|
* Track open sessions with osds.
|
|
*/
|
|
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc)
|
|
{
|
|
struct ceph_osd *osd;
|
|
|
|
osd = kzalloc(sizeof(*osd), GFP_NOFS);
|
|
if (!osd)
|
|
return NULL;
|
|
|
|
atomic_set(&osd->o_ref, 1);
|
|
osd->o_osdc = osdc;
|
|
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(osdc->client->msgr, &osd->o_con);
|
|
osd->o_con.private = osd;
|
|
osd->o_con.ops = &osd_con_ops;
|
|
osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD;
|
|
|
|
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)) {
|
|
struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
|
|
|
|
if (osd->o_authorizer)
|
|
ac->ops->destroy_authorizer(ac, osd->o_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);
|
|
} 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, &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)
|
|
{
|
|
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_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) &&
|
|
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;
|
|
}
|
|
|
|
ceph_osdc_put_request(req);
|
|
|
|
list_del_init(&req->r_req_lru_item);
|
|
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_con_revoke(&req->r_osd->o_con, 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);
|
|
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);
|
|
if (req->r_osd) {
|
|
list_del_init(&req->r_linger_item);
|
|
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)
|
|
{
|
|
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 ((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);
|
|
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);
|
|
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) {
|
|
__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 int __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;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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, *last_req = NULL;
|
|
struct ceph_osd *osd;
|
|
unsigned long timeout = osdc->client->options->osd_timeout * HZ;
|
|
unsigned long keepalive =
|
|
osdc->client->options->osd_keepalive_timeout * HZ;
|
|
unsigned long last_stamp = 0;
|
|
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);
|
|
|
|
/*
|
|
* reset osds that appear to be _really_ unresponsive. this
|
|
* is a failsafe measure.. we really shouldn't be getting to
|
|
* this point if the system is working properly. the monitors
|
|
* should mark the osd as failed and we should find out about
|
|
* it from an updated osd map.
|
|
*/
|
|
while (timeout && !list_empty(&osdc->req_lru)) {
|
|
req = list_entry(osdc->req_lru.next, struct ceph_osd_request,
|
|
r_req_lru_item);
|
|
|
|
/* hasn't been long enough since we sent it? */
|
|
if (time_before(jiffies, req->r_stamp + timeout))
|
|
break;
|
|
|
|
/* hasn't been long enough since it was acked? */
|
|
if (req->r_request->ack_stamp == 0 ||
|
|
time_before(jiffies, req->r_request->ack_stamp + timeout))
|
|
break;
|
|
|
|
BUG_ON(req == last_req && req->r_stamp == last_stamp);
|
|
last_req = req;
|
|
last_stamp = req->r_stamp;
|
|
|
|
osd = req->r_osd;
|
|
BUG_ON(!osd);
|
|
pr_warning(" tid %llu timed out on osd%d, will reset osd\n",
|
|
req->r_tid, osd->o_osd);
|
|
__kick_osd_requests(osdc, osd);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
ceph_con_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 and request_mutex.
|
|
*/
|
|
static void kick_requests(struct ceph_osd_client *osdc)
|
|
{
|
|
struct ceph_osd_request *req, *nreq;
|
|
struct rb_node *p;
|
|
int needmap = 0;
|
|
int err;
|
|
|
|
dout("kick_requests\n");
|
|
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);
|
|
err = __map_request(osdc, 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) {
|
|
dout("%p tid %llu requeued on osd%d\n", req, req->r_tid,
|
|
req->r_osd ? req->r_osd->o_osd : -1);
|
|
if (!req->r_linger)
|
|
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);
|
|
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);
|
|
__unregister_linger_request(osdc, req);
|
|
__register_request(osdc, req);
|
|
}
|
|
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));
|
|
if (ceph_check_fsid(osdc->client, &fsid) < 0)
|
|
return;
|
|
|
|
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);
|
|
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;
|
|
}
|
|
kick_requests(osdc);
|
|
reset_changed_osds(osdc);
|
|
} 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 {
|
|
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)
|
|
ceph_osdmap_destroy(oldmap);
|
|
kick_requests(osdc);
|
|
}
|
|
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);
|
|
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);
|
|
if (rc < 0) {
|
|
if (nofail) {
|
|
dout("osdc_start_request failed map, "
|
|
" will retry %lld\n", req->r_tid);
|
|
rc = 0;
|
|
}
|
|
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 {
|
|
rc = __send_request(osdc, req);
|
|
if (rc) {
|
|
if (nofail) {
|
|
dout("osdc_start_request failed send, "
|
|
" will retry %lld\n", req->r_tid);
|
|
rc = 0;
|
|
} else {
|
|
__unregister_request(osdc, req);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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, OSD_OP_FRONT_LEN, 10, true,
|
|
"osd_op");
|
|
if (err < 0)
|
|
goto out_mempool;
|
|
err = ceph_msgpool_init(&osdc->msgpool_op_reply,
|
|
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 (!req)
|
|
return -ENOMEM;
|
|
|
|
/* 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 (!req)
|
|
return -ENOMEM;
|
|
|
|
/* 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("get_reply revoking msg %p from old con %p\n",
|
|
req->r_reply, req->r_con_filling_msg);
|
|
ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply);
|
|
ceph_con_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);
|
|
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 = ceph_con_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);
|
|
|
|
switch (type) {
|
|
case CEPH_MSG_OSD_MAP:
|
|
case CEPH_MSG_WATCH_NOTIFY:
|
|
return ceph_msg_new(type, front, GFP_NOFS);
|
|
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
|
|
*/
|
|
static int get_authorizer(struct ceph_connection *con,
|
|
void **buf, int *len, int *proto,
|
|
void **reply_buf, int *reply_len, 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;
|
|
int ret = 0;
|
|
|
|
if (force_new && o->o_authorizer) {
|
|
ac->ops->destroy_authorizer(ac, o->o_authorizer);
|
|
o->o_authorizer = NULL;
|
|
}
|
|
if (o->o_authorizer == NULL) {
|
|
ret = ac->ops->create_authorizer(
|
|
ac, CEPH_ENTITY_TYPE_OSD,
|
|
&o->o_authorizer,
|
|
&o->o_authorizer_buf,
|
|
&o->o_authorizer_buf_len,
|
|
&o->o_authorizer_reply_buf,
|
|
&o->o_authorizer_reply_buf_len);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
*proto = ac->protocol;
|
|
*buf = o->o_authorizer_buf;
|
|
*len = o->o_authorizer_buf_len;
|
|
*reply_buf = o->o_authorizer_reply_buf;
|
|
*reply_len = o->o_authorizer_reply_buf_len;
|
|
return 0;
|
|
}
|
|
|
|
|
|
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 ac->ops->verify_authorizer_reply(ac, o->o_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;
|
|
|
|
if (ac->ops->invalidate_authorizer)
|
|
ac->ops->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,
|
|
};
|