![Ilya Dryomov](/assets/img/avatar_default.png)
Handling redirect replies requires both map_sem and request_mutex. Taking map_sem unconditionally near the top of handle_reply() avoids possible race conditions that arise from releasing request_mutex to be able to acquire map_sem in redirect reply case. (Lock ordering is: map_sem, request_mutex, crush_mutex.) Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
2878 lines
74 KiB
C
2878 lines
74 KiB
C
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#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 struct kmem_cache *ceph_osd_request_cache;
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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 void __send_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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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 int calc_layout(struct ceph_file_layout *layout, u64 off, u64 *plen,
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u64 *objnum, u64 *objoff, u64 *objlen)
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{
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u64 orig_len = *plen;
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int r;
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/* object extent? */
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r = ceph_calc_file_object_mapping(layout, off, orig_len, objnum,
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objoff, objlen);
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if (r < 0)
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return r;
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if (*objlen < orig_len) {
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*plen = *objlen;
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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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}
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dout("calc_layout objnum=%llx %llu~%llu\n", *objnum, *objoff, *objlen);
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return 0;
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}
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static void ceph_osd_data_init(struct ceph_osd_data *osd_data)
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{
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memset(osd_data, 0, sizeof (*osd_data));
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osd_data->type = CEPH_OSD_DATA_TYPE_NONE;
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}
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static void ceph_osd_data_pages_init(struct ceph_osd_data *osd_data,
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struct page **pages, u64 length, u32 alignment,
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bool pages_from_pool, bool own_pages)
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{
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osd_data->type = CEPH_OSD_DATA_TYPE_PAGES;
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osd_data->pages = pages;
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osd_data->length = length;
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osd_data->alignment = alignment;
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osd_data->pages_from_pool = pages_from_pool;
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osd_data->own_pages = own_pages;
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}
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static void ceph_osd_data_pagelist_init(struct ceph_osd_data *osd_data,
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struct ceph_pagelist *pagelist)
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{
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osd_data->type = CEPH_OSD_DATA_TYPE_PAGELIST;
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osd_data->pagelist = pagelist;
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}
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#ifdef CONFIG_BLOCK
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static void ceph_osd_data_bio_init(struct ceph_osd_data *osd_data,
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struct bio *bio, size_t bio_length)
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{
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osd_data->type = CEPH_OSD_DATA_TYPE_BIO;
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osd_data->bio = bio;
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osd_data->bio_length = bio_length;
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}
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#endif /* CONFIG_BLOCK */
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#define osd_req_op_data(oreq, whch, typ, fld) \
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({ \
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BUG_ON(whch >= (oreq)->r_num_ops); \
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&(oreq)->r_ops[whch].typ.fld; \
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})
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static struct ceph_osd_data *
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osd_req_op_raw_data_in(struct ceph_osd_request *osd_req, unsigned int which)
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{
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BUG_ON(which >= osd_req->r_num_ops);
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return &osd_req->r_ops[which].raw_data_in;
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}
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struct ceph_osd_data *
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osd_req_op_extent_osd_data(struct ceph_osd_request *osd_req,
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unsigned int which)
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{
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return osd_req_op_data(osd_req, which, extent, osd_data);
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}
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EXPORT_SYMBOL(osd_req_op_extent_osd_data);
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struct ceph_osd_data *
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osd_req_op_cls_response_data(struct ceph_osd_request *osd_req,
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unsigned int which)
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{
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return osd_req_op_data(osd_req, which, cls, response_data);
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}
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EXPORT_SYMBOL(osd_req_op_cls_response_data); /* ??? */
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void osd_req_op_raw_data_in_pages(struct ceph_osd_request *osd_req,
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unsigned int which, struct page **pages,
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u64 length, u32 alignment,
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bool pages_from_pool, bool own_pages)
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{
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struct ceph_osd_data *osd_data;
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osd_data = osd_req_op_raw_data_in(osd_req, which);
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ceph_osd_data_pages_init(osd_data, pages, length, alignment,
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pages_from_pool, own_pages);
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}
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EXPORT_SYMBOL(osd_req_op_raw_data_in_pages);
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void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *osd_req,
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unsigned int which, struct page **pages,
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u64 length, u32 alignment,
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bool pages_from_pool, bool own_pages)
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{
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struct ceph_osd_data *osd_data;
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osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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ceph_osd_data_pages_init(osd_data, pages, length, alignment,
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pages_from_pool, own_pages);
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}
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EXPORT_SYMBOL(osd_req_op_extent_osd_data_pages);
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void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *osd_req,
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unsigned int which, struct ceph_pagelist *pagelist)
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{
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struct ceph_osd_data *osd_data;
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osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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ceph_osd_data_pagelist_init(osd_data, pagelist);
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}
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EXPORT_SYMBOL(osd_req_op_extent_osd_data_pagelist);
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#ifdef CONFIG_BLOCK
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void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *osd_req,
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unsigned int which, struct bio *bio, size_t bio_length)
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{
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struct ceph_osd_data *osd_data;
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osd_data = osd_req_op_data(osd_req, which, extent, osd_data);
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ceph_osd_data_bio_init(osd_data, bio, bio_length);
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}
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EXPORT_SYMBOL(osd_req_op_extent_osd_data_bio);
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#endif /* CONFIG_BLOCK */
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static void osd_req_op_cls_request_info_pagelist(
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struct ceph_osd_request *osd_req,
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unsigned int which, struct ceph_pagelist *pagelist)
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{
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struct ceph_osd_data *osd_data;
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osd_data = osd_req_op_data(osd_req, which, cls, request_info);
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ceph_osd_data_pagelist_init(osd_data, pagelist);
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}
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void osd_req_op_cls_request_data_pagelist(
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struct ceph_osd_request *osd_req,
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unsigned int which, struct ceph_pagelist *pagelist)
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{
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struct ceph_osd_data *osd_data;
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osd_data = osd_req_op_data(osd_req, which, cls, request_data);
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ceph_osd_data_pagelist_init(osd_data, pagelist);
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}
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EXPORT_SYMBOL(osd_req_op_cls_request_data_pagelist);
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void osd_req_op_cls_request_data_pages(struct ceph_osd_request *osd_req,
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unsigned int which, struct page **pages, u64 length,
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u32 alignment, bool pages_from_pool, bool own_pages)
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{
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struct ceph_osd_data *osd_data;
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osd_data = osd_req_op_data(osd_req, which, cls, request_data);
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ceph_osd_data_pages_init(osd_data, pages, length, alignment,
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pages_from_pool, own_pages);
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}
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EXPORT_SYMBOL(osd_req_op_cls_request_data_pages);
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void osd_req_op_cls_response_data_pages(struct ceph_osd_request *osd_req,
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unsigned int which, struct page **pages, u64 length,
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u32 alignment, bool pages_from_pool, bool own_pages)
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{
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struct ceph_osd_data *osd_data;
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osd_data = osd_req_op_data(osd_req, which, cls, response_data);
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ceph_osd_data_pages_init(osd_data, pages, length, alignment,
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pages_from_pool, own_pages);
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}
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EXPORT_SYMBOL(osd_req_op_cls_response_data_pages);
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static u64 ceph_osd_data_length(struct ceph_osd_data *osd_data)
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{
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switch (osd_data->type) {
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case CEPH_OSD_DATA_TYPE_NONE:
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return 0;
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case CEPH_OSD_DATA_TYPE_PAGES:
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return osd_data->length;
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case CEPH_OSD_DATA_TYPE_PAGELIST:
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return (u64)osd_data->pagelist->length;
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#ifdef CONFIG_BLOCK
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case CEPH_OSD_DATA_TYPE_BIO:
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return (u64)osd_data->bio_length;
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#endif /* CONFIG_BLOCK */
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default:
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WARN(true, "unrecognized data type %d\n", (int)osd_data->type);
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return 0;
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}
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}
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static void ceph_osd_data_release(struct ceph_osd_data *osd_data)
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{
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if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES && osd_data->own_pages) {
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int num_pages;
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num_pages = calc_pages_for((u64)osd_data->alignment,
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(u64)osd_data->length);
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ceph_release_page_vector(osd_data->pages, num_pages);
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}
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ceph_osd_data_init(osd_data);
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}
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static void osd_req_op_data_release(struct ceph_osd_request *osd_req,
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unsigned int which)
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{
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struct ceph_osd_req_op *op;
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BUG_ON(which >= osd_req->r_num_ops);
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op = &osd_req->r_ops[which];
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switch (op->op) {
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case CEPH_OSD_OP_READ:
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case CEPH_OSD_OP_WRITE:
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ceph_osd_data_release(&op->extent.osd_data);
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break;
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case CEPH_OSD_OP_CALL:
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ceph_osd_data_release(&op->cls.request_info);
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ceph_osd_data_release(&op->cls.request_data);
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ceph_osd_data_release(&op->cls.response_data);
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break;
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default:
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break;
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}
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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;
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unsigned int which;
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req = container_of(kref, struct ceph_osd_request, 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_revoke_incoming(req->r_reply);
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ceph_msg_put(req->r_reply);
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}
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for (which = 0; which < req->r_num_ops; which++)
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osd_req_op_data_release(req, which);
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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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kmem_cache_free(ceph_osd_request_cache, req);
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}
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EXPORT_SYMBOL(ceph_osdc_release_request);
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struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
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struct ceph_snap_context *snapc,
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unsigned int num_ops,
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bool use_mempool,
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gfp_t gfp_flags)
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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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size_t msg_size;
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BUILD_BUG_ON(CEPH_OSD_MAX_OP > U16_MAX);
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BUG_ON(num_ops > CEPH_OSD_MAX_OP);
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msg_size = 4 + 4 + 8 + 8 + 4+8;
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msg_size += 2 + 4 + 8 + 4 + 4; /* oloc */
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msg_size += 1 + 8 + 4 + 4; /* pg_t */
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msg_size += 4 + CEPH_MAX_OID_NAME_LEN; /* oid */
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msg_size += 2 + num_ops*sizeof(struct ceph_osd_op);
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msg_size += 8; /* snapid */
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msg_size += 8; /* snap_seq */
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msg_size += 8 * (snapc ? snapc->num_snaps : 0); /* snaps */
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msg_size += 4;
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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 = kmem_cache_zalloc(ceph_osd_request_cache, 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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req->r_num_ops = num_ops;
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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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RB_CLEAR_NODE(&req->r_node);
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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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INIT_LIST_HEAD(&req->r_osd_item);
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req->r_base_oloc.pool = -1;
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req->r_target_oloc.pool = -1;
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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, true);
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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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/* create request message; allow space for oid */
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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, true);
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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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memset(msg->front.iov_base, 0, msg->front.iov_len);
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req->r_request = msg;
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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 bool osd_req_opcode_valid(u16 opcode)
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{
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switch (opcode) {
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case CEPH_OSD_OP_READ:
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case CEPH_OSD_OP_STAT:
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case CEPH_OSD_OP_MAPEXT:
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case CEPH_OSD_OP_MASKTRUNC:
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case CEPH_OSD_OP_SPARSE_READ:
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case CEPH_OSD_OP_NOTIFY:
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case CEPH_OSD_OP_NOTIFY_ACK:
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case CEPH_OSD_OP_ASSERT_VER:
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case CEPH_OSD_OP_WRITE:
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case CEPH_OSD_OP_WRITEFULL:
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case CEPH_OSD_OP_TRUNCATE:
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case CEPH_OSD_OP_ZERO:
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case CEPH_OSD_OP_DELETE:
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case CEPH_OSD_OP_APPEND:
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case CEPH_OSD_OP_STARTSYNC:
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case CEPH_OSD_OP_SETTRUNC:
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case CEPH_OSD_OP_TRIMTRUNC:
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case CEPH_OSD_OP_TMAPUP:
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case CEPH_OSD_OP_TMAPPUT:
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case CEPH_OSD_OP_TMAPGET:
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case CEPH_OSD_OP_CREATE:
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case CEPH_OSD_OP_ROLLBACK:
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case CEPH_OSD_OP_WATCH:
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case CEPH_OSD_OP_OMAPGETKEYS:
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case CEPH_OSD_OP_OMAPGETVALS:
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case CEPH_OSD_OP_OMAPGETHEADER:
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case CEPH_OSD_OP_OMAPGETVALSBYKEYS:
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case CEPH_OSD_OP_OMAPSETVALS:
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case CEPH_OSD_OP_OMAPSETHEADER:
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case CEPH_OSD_OP_OMAPCLEAR:
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case CEPH_OSD_OP_OMAPRMKEYS:
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case CEPH_OSD_OP_OMAP_CMP:
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case CEPH_OSD_OP_CLONERANGE:
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case CEPH_OSD_OP_ASSERT_SRC_VERSION:
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case CEPH_OSD_OP_SRC_CMPXATTR:
|
|
case CEPH_OSD_OP_GETXATTR:
|
|
case CEPH_OSD_OP_GETXATTRS:
|
|
case CEPH_OSD_OP_CMPXATTR:
|
|
case CEPH_OSD_OP_SETXATTR:
|
|
case CEPH_OSD_OP_SETXATTRS:
|
|
case CEPH_OSD_OP_RESETXATTRS:
|
|
case CEPH_OSD_OP_RMXATTR:
|
|
case CEPH_OSD_OP_PULL:
|
|
case CEPH_OSD_OP_PUSH:
|
|
case CEPH_OSD_OP_BALANCEREADS:
|
|
case CEPH_OSD_OP_UNBALANCEREADS:
|
|
case CEPH_OSD_OP_SCRUB:
|
|
case CEPH_OSD_OP_SCRUB_RESERVE:
|
|
case CEPH_OSD_OP_SCRUB_UNRESERVE:
|
|
case CEPH_OSD_OP_SCRUB_STOP:
|
|
case CEPH_OSD_OP_SCRUB_MAP:
|
|
case CEPH_OSD_OP_WRLOCK:
|
|
case CEPH_OSD_OP_WRUNLOCK:
|
|
case CEPH_OSD_OP_RDLOCK:
|
|
case CEPH_OSD_OP_RDUNLOCK:
|
|
case CEPH_OSD_OP_UPLOCK:
|
|
case CEPH_OSD_OP_DNLOCK:
|
|
case CEPH_OSD_OP_CALL:
|
|
case CEPH_OSD_OP_PGLS:
|
|
case CEPH_OSD_OP_PGLS_FILTER:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is an osd op init function for opcodes that have no data or
|
|
* other information associated with them. It also serves as a
|
|
* common init routine for all the other init functions, below.
|
|
*/
|
|
static struct ceph_osd_req_op *
|
|
_osd_req_op_init(struct ceph_osd_request *osd_req, unsigned int which,
|
|
u16 opcode)
|
|
{
|
|
struct ceph_osd_req_op *op;
|
|
|
|
BUG_ON(which >= osd_req->r_num_ops);
|
|
BUG_ON(!osd_req_opcode_valid(opcode));
|
|
|
|
op = &osd_req->r_ops[which];
|
|
memset(op, 0, sizeof (*op));
|
|
op->op = opcode;
|
|
|
|
return op;
|
|
}
|
|
|
|
void osd_req_op_init(struct ceph_osd_request *osd_req,
|
|
unsigned int which, u16 opcode)
|
|
{
|
|
(void)_osd_req_op_init(osd_req, which, opcode);
|
|
}
|
|
EXPORT_SYMBOL(osd_req_op_init);
|
|
|
|
void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
|
|
unsigned int which, u16 opcode,
|
|
u64 offset, u64 length,
|
|
u64 truncate_size, u32 truncate_seq)
|
|
{
|
|
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
|
|
size_t payload_len = 0;
|
|
|
|
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
|
|
opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
|
|
opcode != CEPH_OSD_OP_TRUNCATE);
|
|
|
|
op->extent.offset = offset;
|
|
op->extent.length = length;
|
|
op->extent.truncate_size = truncate_size;
|
|
op->extent.truncate_seq = truncate_seq;
|
|
if (opcode == CEPH_OSD_OP_WRITE)
|
|
payload_len += length;
|
|
|
|
op->payload_len = payload_len;
|
|
}
|
|
EXPORT_SYMBOL(osd_req_op_extent_init);
|
|
|
|
void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
|
|
unsigned int which, u64 length)
|
|
{
|
|
struct ceph_osd_req_op *op;
|
|
u64 previous;
|
|
|
|
BUG_ON(which >= osd_req->r_num_ops);
|
|
op = &osd_req->r_ops[which];
|
|
previous = op->extent.length;
|
|
|
|
if (length == previous)
|
|
return; /* Nothing to do */
|
|
BUG_ON(length > previous);
|
|
|
|
op->extent.length = length;
|
|
op->payload_len -= previous - length;
|
|
}
|
|
EXPORT_SYMBOL(osd_req_op_extent_update);
|
|
|
|
void osd_req_op_cls_init(struct ceph_osd_request *osd_req, unsigned int which,
|
|
u16 opcode, const char *class, const char *method)
|
|
{
|
|
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
|
|
struct ceph_pagelist *pagelist;
|
|
size_t payload_len = 0;
|
|
size_t size;
|
|
|
|
BUG_ON(opcode != CEPH_OSD_OP_CALL);
|
|
|
|
pagelist = kmalloc(sizeof (*pagelist), GFP_NOFS);
|
|
BUG_ON(!pagelist);
|
|
ceph_pagelist_init(pagelist);
|
|
|
|
op->cls.class_name = class;
|
|
size = strlen(class);
|
|
BUG_ON(size > (size_t) U8_MAX);
|
|
op->cls.class_len = size;
|
|
ceph_pagelist_append(pagelist, class, size);
|
|
payload_len += size;
|
|
|
|
op->cls.method_name = method;
|
|
size = strlen(method);
|
|
BUG_ON(size > (size_t) U8_MAX);
|
|
op->cls.method_len = size;
|
|
ceph_pagelist_append(pagelist, method, size);
|
|
payload_len += size;
|
|
|
|
osd_req_op_cls_request_info_pagelist(osd_req, which, pagelist);
|
|
|
|
op->cls.argc = 0; /* currently unused */
|
|
|
|
op->payload_len = payload_len;
|
|
}
|
|
EXPORT_SYMBOL(osd_req_op_cls_init);
|
|
|
|
void osd_req_op_watch_init(struct ceph_osd_request *osd_req,
|
|
unsigned int which, u16 opcode,
|
|
u64 cookie, u64 version, int flag)
|
|
{
|
|
struct ceph_osd_req_op *op = _osd_req_op_init(osd_req, which, opcode);
|
|
|
|
BUG_ON(opcode != CEPH_OSD_OP_NOTIFY_ACK && opcode != CEPH_OSD_OP_WATCH);
|
|
|
|
op->watch.cookie = cookie;
|
|
op->watch.ver = version;
|
|
if (opcode == CEPH_OSD_OP_WATCH && flag)
|
|
op->watch.flag = (u8)1;
|
|
}
|
|
EXPORT_SYMBOL(osd_req_op_watch_init);
|
|
|
|
static void ceph_osdc_msg_data_add(struct ceph_msg *msg,
|
|
struct ceph_osd_data *osd_data)
|
|
{
|
|
u64 length = ceph_osd_data_length(osd_data);
|
|
|
|
if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
|
|
BUG_ON(length > (u64) SIZE_MAX);
|
|
if (length)
|
|
ceph_msg_data_add_pages(msg, osd_data->pages,
|
|
length, osd_data->alignment);
|
|
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGELIST) {
|
|
BUG_ON(!length);
|
|
ceph_msg_data_add_pagelist(msg, osd_data->pagelist);
|
|
#ifdef CONFIG_BLOCK
|
|
} else if (osd_data->type == CEPH_OSD_DATA_TYPE_BIO) {
|
|
ceph_msg_data_add_bio(msg, osd_data->bio, length);
|
|
#endif
|
|
} else {
|
|
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_NONE);
|
|
}
|
|
}
|
|
|
|
static u64 osd_req_encode_op(struct ceph_osd_request *req,
|
|
struct ceph_osd_op *dst, unsigned int which)
|
|
{
|
|
struct ceph_osd_req_op *src;
|
|
struct ceph_osd_data *osd_data;
|
|
u64 request_data_len = 0;
|
|
u64 data_length;
|
|
|
|
BUG_ON(which >= req->r_num_ops);
|
|
src = &req->r_ops[which];
|
|
if (WARN_ON(!osd_req_opcode_valid(src->op))) {
|
|
pr_err("unrecognized osd opcode %d\n", src->op);
|
|
|
|
return 0;
|
|
}
|
|
|
|
switch (src->op) {
|
|
case CEPH_OSD_OP_STAT:
|
|
osd_data = &src->raw_data_in;
|
|
ceph_osdc_msg_data_add(req->r_reply, osd_data);
|
|
break;
|
|
case CEPH_OSD_OP_READ:
|
|
case CEPH_OSD_OP_WRITE:
|
|
case CEPH_OSD_OP_ZERO:
|
|
case CEPH_OSD_OP_DELETE:
|
|
case CEPH_OSD_OP_TRUNCATE:
|
|
if (src->op == CEPH_OSD_OP_WRITE)
|
|
request_data_len = src->extent.length;
|
|
dst->extent.offset = cpu_to_le64(src->extent.offset);
|
|
dst->extent.length = cpu_to_le64(src->extent.length);
|
|
dst->extent.truncate_size =
|
|
cpu_to_le64(src->extent.truncate_size);
|
|
dst->extent.truncate_seq =
|
|
cpu_to_le32(src->extent.truncate_seq);
|
|
osd_data = &src->extent.osd_data;
|
|
if (src->op == CEPH_OSD_OP_WRITE)
|
|
ceph_osdc_msg_data_add(req->r_request, osd_data);
|
|
else
|
|
ceph_osdc_msg_data_add(req->r_reply, osd_data);
|
|
break;
|
|
case CEPH_OSD_OP_CALL:
|
|
dst->cls.class_len = src->cls.class_len;
|
|
dst->cls.method_len = src->cls.method_len;
|
|
osd_data = &src->cls.request_info;
|
|
ceph_osdc_msg_data_add(req->r_request, osd_data);
|
|
BUG_ON(osd_data->type != CEPH_OSD_DATA_TYPE_PAGELIST);
|
|
request_data_len = osd_data->pagelist->length;
|
|
|
|
osd_data = &src->cls.request_data;
|
|
data_length = ceph_osd_data_length(osd_data);
|
|
if (data_length) {
|
|
BUG_ON(osd_data->type == CEPH_OSD_DATA_TYPE_NONE);
|
|
dst->cls.indata_len = cpu_to_le32(data_length);
|
|
ceph_osdc_msg_data_add(req->r_request, osd_data);
|
|
src->payload_len += data_length;
|
|
request_data_len += data_length;
|
|
}
|
|
osd_data = &src->cls.response_data;
|
|
ceph_osdc_msg_data_add(req->r_reply, osd_data);
|
|
break;
|
|
case CEPH_OSD_OP_STARTSYNC:
|
|
break;
|
|
case CEPH_OSD_OP_NOTIFY_ACK:
|
|
case CEPH_OSD_OP_WATCH:
|
|
dst->watch.cookie = cpu_to_le64(src->watch.cookie);
|
|
dst->watch.ver = cpu_to_le64(src->watch.ver);
|
|
dst->watch.flag = src->watch.flag;
|
|
break;
|
|
default:
|
|
pr_err("unsupported osd opcode %s\n",
|
|
ceph_osd_op_name(src->op));
|
|
WARN_ON(1);
|
|
|
|
return 0;
|
|
}
|
|
dst->op = cpu_to_le16(src->op);
|
|
dst->payload_len = cpu_to_le32(src->payload_len);
|
|
|
|
return request_data_len;
|
|
}
|
|
|
|
/*
|
|
* build new request AND message, calculate layout, and adjust file
|
|
* extent as needed.
|
|
*
|
|
* if the file was recently truncated, we include information about its
|
|
* old and new size so that the object can be updated appropriately. (we
|
|
* avoid synchronously deleting truncated objects because it's slow.)
|
|
*
|
|
* if @do_sync, include a 'startsync' command so that the osd will flush
|
|
* data quickly.
|
|
*/
|
|
struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *osdc,
|
|
struct ceph_file_layout *layout,
|
|
struct ceph_vino vino,
|
|
u64 off, u64 *plen, int num_ops,
|
|
int opcode, int flags,
|
|
struct ceph_snap_context *snapc,
|
|
u32 truncate_seq,
|
|
u64 truncate_size,
|
|
bool use_mempool)
|
|
{
|
|
struct ceph_osd_request *req;
|
|
u64 objnum = 0;
|
|
u64 objoff = 0;
|
|
u64 objlen = 0;
|
|
u32 object_size;
|
|
u64 object_base;
|
|
int r;
|
|
|
|
BUG_ON(opcode != CEPH_OSD_OP_READ && opcode != CEPH_OSD_OP_WRITE &&
|
|
opcode != CEPH_OSD_OP_DELETE && opcode != CEPH_OSD_OP_ZERO &&
|
|
opcode != CEPH_OSD_OP_TRUNCATE);
|
|
|
|
req = ceph_osdc_alloc_request(osdc, snapc, num_ops, use_mempool,
|
|
GFP_NOFS);
|
|
if (!req)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
req->r_flags = flags;
|
|
|
|
/* calculate max write size */
|
|
r = calc_layout(layout, off, plen, &objnum, &objoff, &objlen);
|
|
if (r < 0) {
|
|
ceph_osdc_put_request(req);
|
|
return ERR_PTR(r);
|
|
}
|
|
|
|
object_size = le32_to_cpu(layout->fl_object_size);
|
|
object_base = off - objoff;
|
|
if (!(truncate_seq == 1 && truncate_size == -1ULL)) {
|
|
if (truncate_size <= object_base) {
|
|
truncate_size = 0;
|
|
} else {
|
|
truncate_size -= object_base;
|
|
if (truncate_size > object_size)
|
|
truncate_size = object_size;
|
|
}
|
|
}
|
|
|
|
osd_req_op_extent_init(req, 0, opcode, objoff, objlen,
|
|
truncate_size, truncate_seq);
|
|
|
|
/*
|
|
* A second op in the ops array means the caller wants to
|
|
* also issue a include a 'startsync' command so that the
|
|
* osd will flush data quickly.
|
|
*/
|
|
if (num_ops > 1)
|
|
osd_req_op_init(req, 1, CEPH_OSD_OP_STARTSYNC);
|
|
|
|
req->r_base_oloc.pool = ceph_file_layout_pg_pool(*layout);
|
|
|
|
snprintf(req->r_base_oid.name, sizeof(req->r_base_oid.name),
|
|
"%llx.%08llx", vino.ino, objnum);
|
|
req->r_base_oid.name_len = strlen(req->r_base_oid.name);
|
|
|
|
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;
|
|
LIST_HEAD(resend);
|
|
int err;
|
|
|
|
dout("__kick_osd_requests osd%d\n", osd->o_osd);
|
|
err = __reset_osd(osdc, osd);
|
|
if (err)
|
|
return;
|
|
/*
|
|
* Build up a list of requests to resend by traversing the
|
|
* osd's list of requests. Requests for a given object are
|
|
* sent in tid order, and that is also the order they're
|
|
* kept on this list. Therefore all requests that are in
|
|
* flight will be found first, followed by all requests that
|
|
* have not yet been sent. And to resend requests while
|
|
* preserving this order we will want to put any sent
|
|
* requests back on the front of the osd client's unsent
|
|
* list.
|
|
*
|
|
* So we build a separate ordered list of already-sent
|
|
* requests for the affected osd and splice it onto the
|
|
* front of the osd client's unsent list. Once we've seen a
|
|
* request that has not yet been sent we're done. Those
|
|
* requests are already sitting right where they belong.
|
|
*/
|
|
list_for_each_entry(req, &osd->o_requests, r_osd_item) {
|
|
if (!req->r_sent)
|
|
break;
|
|
list_move_tail(&req->r_req_lru_item, &resend);
|
|
dout("requeueing %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_splice(&resend, &osdc->req_unsent);
|
|
|
|
/*
|
|
* Linger requests are re-registered before sending, which
|
|
* sets up a new tid for each. We add them to the unsent
|
|
* list at the end to keep things in tid order.
|
|
*/
|
|
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_tail(&req->r_req_lru_item, &osdc->req_unsent);
|
|
list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
|
|
__unregister_linger_request(osdc, req);
|
|
dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
|
|
osd->o_osd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the osd connection drops, we need to resubmit all requests.
|
|
*/
|
|
static void osd_reset(struct ceph_connection *con)
|
|
{
|
|
struct ceph_osd *osd = con->private;
|
|
struct ceph_osd_client *osdc;
|
|
|
|
if (!osd)
|
|
return;
|
|
dout("osd_reset osd%d\n", osd->o_osd);
|
|
osdc = osd->o_osdc;
|
|
down_read(&osdc->map_sem);
|
|
mutex_lock(&osdc->request_mutex);
|
|
__kick_osd_requests(osdc, osd);
|
|
__send_queued(osdc);
|
|
mutex_unlock(&osdc->request_mutex);
|
|
up_read(&osdc->map_sem);
|
|
}
|
|
|
|
/*
|
|
* Track open sessions with osds.
|
|
*/
|
|
static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum)
|
|
{
|
|
struct ceph_osd *osd;
|
|
|
|
osd = kzalloc(sizeof(*osd), GFP_NOFS);
|
|
if (!osd)
|
|
return NULL;
|
|
|
|
atomic_set(&osd->o_ref, 1);
|
|
osd->o_osdc = osdc;
|
|
osd->o_osd = onum;
|
|
RB_CLEAR_NODE(&osd->o_node);
|
|
INIT_LIST_HEAD(&osd->o_requests);
|
|
INIT_LIST_HEAD(&osd->o_linger_requests);
|
|
INIT_LIST_HEAD(&osd->o_osd_lru);
|
|
osd->o_incarnation = 1;
|
|
|
|
ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr);
|
|
|
|
INIT_LIST_HEAD(&osd->o_keepalive_item);
|
|
return osd;
|
|
}
|
|
|
|
static struct ceph_osd *get_osd(struct ceph_osd *osd)
|
|
{
|
|
if (atomic_inc_not_zero(&osd->o_ref)) {
|
|
dout("get_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref)-1,
|
|
atomic_read(&osd->o_ref));
|
|
return osd;
|
|
} else {
|
|
dout("get_osd %p FAIL\n", osd);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static void put_osd(struct ceph_osd *osd)
|
|
{
|
|
dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
|
|
atomic_read(&osd->o_ref) - 1);
|
|
if (atomic_dec_and_test(&osd->o_ref) && osd->o_auth.authorizer) {
|
|
struct ceph_auth_client *ac = osd->o_osdc->client->monc.auth;
|
|
|
|
ceph_auth_destroy_authorizer(ac, osd->o_auth.authorizer);
|
|
kfree(osd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* remove an osd from our map
|
|
*/
|
|
static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd)
|
|
{
|
|
dout("__remove_osd %p\n", osd);
|
|
BUG_ON(!list_empty(&osd->o_requests));
|
|
rb_erase(&osd->o_node, &osdc->osds);
|
|
list_del_init(&osd->o_osd_lru);
|
|
ceph_con_close(&osd->o_con);
|
|
put_osd(osd);
|
|
}
|
|
|
|
static void remove_all_osds(struct ceph_osd_client *osdc)
|
|
{
|
|
dout("%s %p\n", __func__, 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_entity_addr *peer_addr;
|
|
|
|
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);
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
peer_addr = &osdc->osdmap->osd_addr[osd->o_osd];
|
|
if (!memcmp(peer_addr, &osd->o_con.peer_addr, sizeof (*peer_addr)) &&
|
|
!ceph_con_opened(&osd->o_con)) {
|
|
struct ceph_osd_request *req;
|
|
|
|
dout("osd addr hasn't changed and connection never opened, "
|
|
"letting msgr retry\n");
|
|
/* touch each r_stamp for handle_timeout()'s benfit */
|
|
list_for_each_entry(req, &osd->o_requests, r_osd_item)
|
|
req->r_stamp = jiffies;
|
|
|
|
return -EAGAIN;
|
|
}
|
|
|
|
ceph_con_close(&osd->o_con);
|
|
ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, peer_addr);
|
|
osd->o_incarnation++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* called under osdc->request_mutex
|
|
*/
|
|
static void __unregister_request(struct ceph_osd_client *osdc,
|
|
struct ceph_osd_request *req)
|
|
{
|
|
if (RB_EMPTY_NODE(&req->r_node)) {
|
|
dout("__unregister_request %p tid %lld not registered\n",
|
|
req, req->r_tid);
|
|
return;
|
|
}
|
|
|
|
dout("__unregister_request %p tid %lld\n", req, req->r_tid);
|
|
rb_erase(&req->r_node, &osdc->requests);
|
|
osdc->num_requests--;
|
|
|
|
if (req->r_osd) {
|
|
/* make sure the original request isn't in flight. */
|
|
ceph_msg_revoke(req->r_request);
|
|
|
|
list_del_init(&req->r_osd_item);
|
|
if (list_empty(&req->r_osd->o_requests) &&
|
|
list_empty(&req->r_osd->o_linger_requests)) {
|
|
dout("moving osd to %p lru\n", req->r_osd);
|
|
__move_osd_to_lru(osdc, req->r_osd);
|
|
}
|
|
if (list_empty(&req->r_linger_item))
|
|
req->r_osd = NULL;
|
|
}
|
|
|
|
list_del_init(&req->r_req_lru_item);
|
|
ceph_osdc_put_request(req);
|
|
|
|
if (osdc->num_requests == 0) {
|
|
dout(" no requests, canceling timeout\n");
|
|
__cancel_osd_timeout(osdc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Cancel a previously queued request message
|
|
*/
|
|
static void __cancel_request(struct ceph_osd_request *req)
|
|
{
|
|
if (req->r_sent && req->r_osd) {
|
|
ceph_msg_revoke(req->r_request);
|
|
req->r_sent = 0;
|
|
}
|
|
}
|
|
|
|
static void __register_linger_request(struct ceph_osd_client *osdc,
|
|
struct ceph_osd_request *req)
|
|
{
|
|
dout("__register_linger_request %p\n", req);
|
|
ceph_osdc_get_request(req);
|
|
list_add_tail(&req->r_linger_item, &osdc->req_linger);
|
|
if (req->r_osd)
|
|
list_add_tail(&req->r_linger_osd,
|
|
&req->r_osd->o_linger_requests);
|
|
}
|
|
|
|
static void __unregister_linger_request(struct ceph_osd_client *osdc,
|
|
struct ceph_osd_request *req)
|
|
{
|
|
dout("__unregister_linger_request %p\n", req);
|
|
list_del_init(&req->r_linger_item);
|
|
if (req->r_osd) {
|
|
list_del_init(&req->r_linger_osd);
|
|
|
|
if (list_empty(&req->r_osd->o_requests) &&
|
|
list_empty(&req->r_osd->o_linger_requests)) {
|
|
dout("moving osd to %p lru\n", req->r_osd);
|
|
__move_osd_to_lru(osdc, req->r_osd);
|
|
}
|
|
if (list_empty(&req->r_osd_item))
|
|
req->r_osd = NULL;
|
|
}
|
|
ceph_osdc_put_request(req);
|
|
}
|
|
|
|
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) {
|
|
req->r_linger = 0;
|
|
__unregister_linger_request(osdc, 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;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(ceph_osdc_set_request_linger);
|
|
|
|
/*
|
|
* Returns whether a request should be blocked from being sent
|
|
* based on the current osdmap and osd_client settings.
|
|
*
|
|
* Caller should hold map_sem for read.
|
|
*/
|
|
static bool __req_should_be_paused(struct ceph_osd_client *osdc,
|
|
struct ceph_osd_request *req)
|
|
{
|
|
bool pauserd = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD);
|
|
bool pausewr = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR) ||
|
|
ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
|
|
return (req->r_flags & CEPH_OSD_FLAG_READ && pauserd) ||
|
|
(req->r_flags & CEPH_OSD_FLAG_WRITE && pausewr);
|
|
}
|
|
|
|
/*
|
|
* Calculate mapping of a request to a PG. Takes tiering into account.
|
|
*/
|
|
static int __calc_request_pg(struct ceph_osdmap *osdmap,
|
|
struct ceph_osd_request *req,
|
|
struct ceph_pg *pg_out)
|
|
{
|
|
bool need_check_tiering;
|
|
|
|
need_check_tiering = false;
|
|
if (req->r_target_oloc.pool == -1) {
|
|
req->r_target_oloc = req->r_base_oloc; /* struct */
|
|
need_check_tiering = true;
|
|
}
|
|
if (req->r_target_oid.name_len == 0) {
|
|
ceph_oid_copy(&req->r_target_oid, &req->r_base_oid);
|
|
need_check_tiering = true;
|
|
}
|
|
|
|
if (need_check_tiering &&
|
|
(req->r_flags & CEPH_OSD_FLAG_IGNORE_OVERLAY) == 0) {
|
|
struct ceph_pg_pool_info *pi;
|
|
|
|
pi = ceph_pg_pool_by_id(osdmap, req->r_target_oloc.pool);
|
|
if (pi) {
|
|
if ((req->r_flags & CEPH_OSD_FLAG_READ) &&
|
|
pi->read_tier >= 0)
|
|
req->r_target_oloc.pool = pi->read_tier;
|
|
if ((req->r_flags & CEPH_OSD_FLAG_WRITE) &&
|
|
pi->write_tier >= 0)
|
|
req->r_target_oloc.pool = pi->write_tier;
|
|
}
|
|
/* !pi is caught in ceph_oloc_oid_to_pg() */
|
|
}
|
|
|
|
return ceph_oloc_oid_to_pg(osdmap, &req->r_target_oloc,
|
|
&req->r_target_oid, pg_out);
|
|
}
|
|
|
|
/*
|
|
* Pick an osd (the first 'up' osd in the pg), allocate the osd struct
|
|
* (as needed), and set the request r_osd appropriately. If there is
|
|
* no up osd, set r_osd to NULL. Move the request to the appropriate list
|
|
* (unsent, homeless) or leave on in-flight lru.
|
|
*
|
|
* Return 0 if unchanged, 1 if changed, or negative on error.
|
|
*
|
|
* Caller should hold map_sem for read and request_mutex.
|
|
*/
|
|
static int __map_request(struct ceph_osd_client *osdc,
|
|
struct ceph_osd_request *req, int force_resend)
|
|
{
|
|
struct ceph_pg pgid;
|
|
int acting[CEPH_PG_MAX_SIZE];
|
|
int o = -1, num = 0;
|
|
int err;
|
|
bool was_paused;
|
|
|
|
dout("map_request %p tid %lld\n", req, req->r_tid);
|
|
|
|
err = __calc_request_pg(osdc->osdmap, req, &pgid);
|
|
if (err) {
|
|
list_move(&req->r_req_lru_item, &osdc->req_notarget);
|
|
return err;
|
|
}
|
|
req->r_pgid = pgid;
|
|
|
|
err = ceph_calc_pg_acting(osdc->osdmap, pgid, acting);
|
|
if (err > 0) {
|
|
o = acting[0];
|
|
num = err;
|
|
}
|
|
|
|
was_paused = req->r_paused;
|
|
req->r_paused = __req_should_be_paused(osdc, req);
|
|
if (was_paused && !req->r_paused)
|
|
force_resend = 1;
|
|
|
|
if ((!force_resend &&
|
|
req->r_osd && req->r_osd->o_osd == o &&
|
|
req->r_sent >= req->r_osd->o_incarnation &&
|
|
req->r_num_pg_osds == num &&
|
|
memcmp(req->r_pg_osds, acting, sizeof(acting[0])*num) == 0) ||
|
|
(req->r_osd == NULL && o == -1) ||
|
|
req->r_paused)
|
|
return 0; /* no change */
|
|
|
|
dout("map_request tid %llu pgid %lld.%x osd%d (was osd%d)\n",
|
|
req->r_tid, pgid.pool, pgid.seed, o,
|
|
req->r_osd ? req->r_osd->o_osd : -1);
|
|
|
|
/* record full pg acting set */
|
|
memcpy(req->r_pg_osds, acting, sizeof(acting[0]) * num);
|
|
req->r_num_pg_osds = num;
|
|
|
|
if (req->r_osd) {
|
|
__cancel_request(req);
|
|
list_del_init(&req->r_osd_item);
|
|
req->r_osd = NULL;
|
|
}
|
|
|
|
req->r_osd = __lookup_osd(osdc, o);
|
|
if (!req->r_osd && o >= 0) {
|
|
err = -ENOMEM;
|
|
req->r_osd = create_osd(osdc, o);
|
|
if (!req->r_osd) {
|
|
list_move(&req->r_req_lru_item, &osdc->req_notarget);
|
|
goto out;
|
|
}
|
|
|
|
dout("map_request osd %p is osd%d\n", req->r_osd, o);
|
|
__insert_osd(osdc, req->r_osd);
|
|
|
|
ceph_con_open(&req->r_osd->o_con,
|
|
CEPH_ENTITY_TYPE_OSD, o,
|
|
&osdc->osdmap->osd_addr[o]);
|
|
}
|
|
|
|
if (req->r_osd) {
|
|
__remove_osd_from_lru(req->r_osd);
|
|
list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
|
|
list_move_tail(&req->r_req_lru_item, &osdc->req_unsent);
|
|
} else {
|
|
list_move_tail(&req->r_req_lru_item, &osdc->req_notarget);
|
|
}
|
|
err = 1; /* osd or pg changed */
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* caller should hold map_sem (for read) and request_mutex
|
|
*/
|
|
static void __send_request(struct ceph_osd_client *osdc,
|
|
struct ceph_osd_request *req)
|
|
{
|
|
void *p;
|
|
|
|
dout("send_request %p tid %llu to osd%d flags %d pg %lld.%x\n",
|
|
req, req->r_tid, req->r_osd->o_osd, req->r_flags,
|
|
(unsigned long long)req->r_pgid.pool, req->r_pgid.seed);
|
|
|
|
/* fill in message content that changes each time we send it */
|
|
put_unaligned_le32(osdc->osdmap->epoch, req->r_request_osdmap_epoch);
|
|
put_unaligned_le32(req->r_flags, req->r_request_flags);
|
|
put_unaligned_le64(req->r_target_oloc.pool, req->r_request_pool);
|
|
p = req->r_request_pgid;
|
|
ceph_encode_64(&p, req->r_pgid.pool);
|
|
ceph_encode_32(&p, req->r_pgid.seed);
|
|
put_unaligned_le64(1, req->r_request_attempts); /* FIXME */
|
|
memcpy(req->r_request_reassert_version, &req->r_reassert_version,
|
|
sizeof(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 */
|
|
|
|
req->r_sent = req->r_osd->o_incarnation;
|
|
|
|
ceph_con_send(&req->r_osd->o_con, req->r_request);
|
|
}
|
|
|
|
/*
|
|
* 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");
|
|
list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
|
|
__send_request(osdc, req);
|
|
}
|
|
|
|
/*
|
|
* Caller should hold map_sem for read and request_mutex.
|
|
*/
|
|
static int __ceph_osdc_start_request(struct ceph_osd_client *osdc,
|
|
struct ceph_osd_request *req,
|
|
bool nofail)
|
|
{
|
|
int rc;
|
|
|
|
__register_request(osdc, req);
|
|
req->r_sent = 0;
|
|
req->r_got_reply = 0;
|
|
rc = __map_request(osdc, req, 0);
|
|
if (rc < 0) {
|
|
if (nofail) {
|
|
dout("osdc_start_request failed map, "
|
|
" will retry %lld\n", req->r_tid);
|
|
rc = 0;
|
|
} else {
|
|
__unregister_request(osdc, req);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
if (req->r_osd == NULL) {
|
|
dout("send_request %p no up osds in pg\n", req);
|
|
ceph_monc_request_next_osdmap(&osdc->client->monc);
|
|
} else {
|
|
__send_queued(osdc);
|
|
}
|
|
|
|
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;
|
|
unsigned long keepalive =
|
|
osdc->client->options->osd_keepalive_timeout * HZ;
|
|
struct list_head slow_osds;
|
|
dout("timeout\n");
|
|
down_read(&osdc->map_sem);
|
|
|
|
ceph_monc_request_next_osdmap(&osdc->client->monc);
|
|
|
|
mutex_lock(&osdc->request_mutex);
|
|
|
|
/*
|
|
* ping osds that are a bit slow. this ensures that if there
|
|
* is a break in the TCP connection we will notice, and reopen
|
|
* a connection with that osd (from the fault callback).
|
|
*/
|
|
INIT_LIST_HEAD(&slow_osds);
|
|
list_for_each_entry(req, &osdc->req_lru, r_req_lru_item) {
|
|
if (time_before(jiffies, req->r_stamp + keepalive))
|
|
break;
|
|
|
|
osd = req->r_osd;
|
|
BUG_ON(!osd);
|
|
dout(" tid %llu is slow, will send keepalive on osd%d\n",
|
|
req->r_tid, osd->o_osd);
|
|
list_move_tail(&osd->o_keepalive_item, &slow_osds);
|
|
}
|
|
while (!list_empty(&slow_osds)) {
|
|
osd = list_entry(slow_osds.next, struct ceph_osd,
|
|
o_keepalive_item);
|
|
list_del_init(&osd->o_keepalive_item);
|
|
ceph_con_keepalive(&osd->o_con);
|
|
}
|
|
|
|
__schedule_osd_timeout(osdc);
|
|
__send_queued(osdc);
|
|
mutex_unlock(&osdc->request_mutex);
|
|
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 int ceph_oloc_decode(void **p, void *end,
|
|
struct ceph_object_locator *oloc)
|
|
{
|
|
u8 struct_v, struct_cv;
|
|
u32 len;
|
|
void *struct_end;
|
|
int ret = 0;
|
|
|
|
ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
|
|
struct_v = ceph_decode_8(p);
|
|
struct_cv = ceph_decode_8(p);
|
|
if (struct_v < 3) {
|
|
pr_warn("got v %d < 3 cv %d of ceph_object_locator\n",
|
|
struct_v, struct_cv);
|
|
goto e_inval;
|
|
}
|
|
if (struct_cv > 6) {
|
|
pr_warn("got v %d cv %d > 6 of ceph_object_locator\n",
|
|
struct_v, struct_cv);
|
|
goto e_inval;
|
|
}
|
|
len = ceph_decode_32(p);
|
|
ceph_decode_need(p, end, len, e_inval);
|
|
struct_end = *p + len;
|
|
|
|
oloc->pool = ceph_decode_64(p);
|
|
*p += 4; /* skip preferred */
|
|
|
|
len = ceph_decode_32(p);
|
|
if (len > 0) {
|
|
pr_warn("ceph_object_locator::key is set\n");
|
|
goto e_inval;
|
|
}
|
|
|
|
if (struct_v >= 5) {
|
|
len = ceph_decode_32(p);
|
|
if (len > 0) {
|
|
pr_warn("ceph_object_locator::nspace is set\n");
|
|
goto e_inval;
|
|
}
|
|
}
|
|
|
|
if (struct_v >= 6) {
|
|
s64 hash = ceph_decode_64(p);
|
|
if (hash != -1) {
|
|
pr_warn("ceph_object_locator::hash is set\n");
|
|
goto e_inval;
|
|
}
|
|
}
|
|
|
|
/* skip the rest */
|
|
*p = struct_end;
|
|
out:
|
|
return ret;
|
|
|
|
e_inval:
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
static int ceph_redirect_decode(void **p, void *end,
|
|
struct ceph_request_redirect *redir)
|
|
{
|
|
u8 struct_v, struct_cv;
|
|
u32 len;
|
|
void *struct_end;
|
|
int ret;
|
|
|
|
ceph_decode_need(p, end, 1 + 1 + 4, e_inval);
|
|
struct_v = ceph_decode_8(p);
|
|
struct_cv = ceph_decode_8(p);
|
|
if (struct_cv > 1) {
|
|
pr_warn("got v %d cv %d > 1 of ceph_request_redirect\n",
|
|
struct_v, struct_cv);
|
|
goto e_inval;
|
|
}
|
|
len = ceph_decode_32(p);
|
|
ceph_decode_need(p, end, len, e_inval);
|
|
struct_end = *p + len;
|
|
|
|
ret = ceph_oloc_decode(p, end, &redir->oloc);
|
|
if (ret)
|
|
goto out;
|
|
|
|
len = ceph_decode_32(p);
|
|
if (len > 0) {
|
|
pr_warn("ceph_request_redirect::object_name is set\n");
|
|
goto e_inval;
|
|
}
|
|
|
|
len = ceph_decode_32(p);
|
|
*p += len; /* skip osd_instructions */
|
|
|
|
/* skip the rest */
|
|
*p = struct_end;
|
|
out:
|
|
return ret;
|
|
|
|
e_inval:
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
static void complete_request(struct ceph_osd_request *req)
|
|
{
|
|
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)
|
|
{
|
|
void *p, *end;
|
|
struct ceph_osd_request *req;
|
|
struct ceph_request_redirect redir;
|
|
u64 tid;
|
|
int object_len;
|
|
unsigned int numops;
|
|
int payload_len, flags;
|
|
s32 result;
|
|
s32 retry_attempt;
|
|
struct ceph_pg pg;
|
|
int err;
|
|
u32 reassert_epoch;
|
|
u64 reassert_version;
|
|
u32 osdmap_epoch;
|
|
int already_completed;
|
|
u32 bytes;
|
|
unsigned int i;
|
|
|
|
tid = le64_to_cpu(msg->hdr.tid);
|
|
dout("handle_reply %p tid %llu\n", msg, tid);
|
|
|
|
p = msg->front.iov_base;
|
|
end = p + msg->front.iov_len;
|
|
|
|
ceph_decode_need(&p, end, 4, bad);
|
|
object_len = ceph_decode_32(&p);
|
|
ceph_decode_need(&p, end, object_len, bad);
|
|
p += object_len;
|
|
|
|
err = ceph_decode_pgid(&p, end, &pg);
|
|
if (err)
|
|
goto bad;
|
|
|
|
ceph_decode_need(&p, end, 8 + 4 + 4 + 8 + 4, bad);
|
|
flags = ceph_decode_64(&p);
|
|
result = ceph_decode_32(&p);
|
|
reassert_epoch = ceph_decode_32(&p);
|
|
reassert_version = ceph_decode_64(&p);
|
|
osdmap_epoch = ceph_decode_32(&p);
|
|
|
|
/* lookup */
|
|
down_read(&osdc->map_sem);
|
|
mutex_lock(&osdc->request_mutex);
|
|
req = __lookup_request(osdc, tid);
|
|
if (req == NULL) {
|
|
dout("handle_reply tid %llu dne\n", tid);
|
|
goto bad_mutex;
|
|
}
|
|
ceph_osdc_get_request(req);
|
|
|
|
dout("handle_reply %p tid %llu req %p result %d\n", msg, tid,
|
|
req, result);
|
|
|
|
ceph_decode_need(&p, end, 4, bad_put);
|
|
numops = ceph_decode_32(&p);
|
|
if (numops > CEPH_OSD_MAX_OP)
|
|
goto bad_put;
|
|
if (numops != req->r_num_ops)
|
|
goto bad_put;
|
|
payload_len = 0;
|
|
ceph_decode_need(&p, end, numops * sizeof(struct ceph_osd_op), bad_put);
|
|
for (i = 0; i < numops; i++) {
|
|
struct ceph_osd_op *op = p;
|
|
int len;
|
|
|
|
len = le32_to_cpu(op->payload_len);
|
|
req->r_reply_op_len[i] = len;
|
|
dout(" op %d has %d bytes\n", i, len);
|
|
payload_len += len;
|
|
p += sizeof(*op);
|
|
}
|
|
bytes = le32_to_cpu(msg->hdr.data_len);
|
|
if (payload_len != bytes) {
|
|
pr_warning("sum of op payload lens %d != data_len %d",
|
|
payload_len, bytes);
|
|
goto bad_put;
|
|
}
|
|
|
|
ceph_decode_need(&p, end, 4 + numops * 4, bad_put);
|
|
retry_attempt = ceph_decode_32(&p);
|
|
for (i = 0; i < numops; i++)
|
|
req->r_reply_op_result[i] = ceph_decode_32(&p);
|
|
|
|
if (le16_to_cpu(msg->hdr.version) >= 6) {
|
|
p += 8 + 4; /* skip replay_version */
|
|
p += 8; /* skip user_version */
|
|
|
|
err = ceph_redirect_decode(&p, end, &redir);
|
|
if (err)
|
|
goto bad_put;
|
|
} else {
|
|
redir.oloc.pool = -1;
|
|
}
|
|
|
|
if (redir.oloc.pool != -1) {
|
|
dout("redirect pool %lld\n", redir.oloc.pool);
|
|
|
|
__unregister_request(osdc, req);
|
|
|
|
req->r_target_oloc = redir.oloc; /* struct */
|
|
|
|
/*
|
|
* Start redirect requests with nofail=true. If
|
|
* mapping fails, request will end up on the notarget
|
|
* list, waiting for the new osdmap (which can take
|
|
* a while), even though the original request mapped
|
|
* successfully. In the future we might want to follow
|
|
* original request's nofail setting here.
|
|
*/
|
|
err = __ceph_osdc_start_request(osdc, req, true);
|
|
BUG_ON(err);
|
|
|
|
goto out_unlock;
|
|
}
|
|
|
|
already_completed = req->r_got_reply;
|
|
if (!req->r_got_reply) {
|
|
req->r_result = result;
|
|
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.epoch = cpu_to_le32(reassert_epoch);
|
|
req->r_reassert_version.version = cpu_to_le64(reassert_version);
|
|
|
|
req->r_got_reply = 1;
|
|
} else if ((flags & CEPH_OSD_FLAG_ONDISK) == 0) {
|
|
dout("handle_reply tid %llu dup ack\n", tid);
|
|
goto out_unlock;
|
|
}
|
|
|
|
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);
|
|
up_read(&osdc->map_sem);
|
|
|
|
if (!already_completed) {
|
|
if (req->r_unsafe_callback &&
|
|
result >= 0 && !(flags & CEPH_OSD_FLAG_ONDISK))
|
|
req->r_unsafe_callback(req, true);
|
|
if (req->r_callback)
|
|
req->r_callback(req, msg);
|
|
else
|
|
complete_all(&req->r_completion);
|
|
}
|
|
|
|
if (flags & CEPH_OSD_FLAG_ONDISK) {
|
|
if (req->r_unsafe_callback && already_completed)
|
|
req->r_unsafe_callback(req, false);
|
|
complete_request(req);
|
|
}
|
|
|
|
out:
|
|
dout("req=%p req->r_linger=%d\n", req, req->r_linger);
|
|
ceph_osdc_put_request(req);
|
|
return;
|
|
out_unlock:
|
|
mutex_unlock(&osdc->request_mutex);
|
|
up_read(&osdc->map_sem);
|
|
goto out;
|
|
|
|
bad_put:
|
|
req->r_result = -EIO;
|
|
__unregister_request(osdc, req);
|
|
if (req->r_callback)
|
|
req->r_callback(req, msg);
|
|
else
|
|
complete_all(&req->r_completion);
|
|
complete_request(req);
|
|
ceph_osdc_put_request(req);
|
|
bad_mutex:
|
|
mutex_unlock(&osdc->request_mutex);
|
|
up_read(&osdc->map_sem);
|
|
bad:
|
|
pr_err("corrupt osd_op_reply got %d %d\n",
|
|
(int)msg->front.iov_len, le32_to_cpu(msg->hdr.front_len));
|
|
ceph_msg_dump(msg);
|
|
}
|
|
|
|
static void reset_changed_osds(struct ceph_osd_client *osdc)
|
|
{
|
|
struct rb_node *p, *n;
|
|
|
|
for (p = rb_first(&osdc->osds); p; p = n) {
|
|
struct ceph_osd *osd = rb_entry(p, struct ceph_osd, o_node);
|
|
|
|
n = rb_next(p);
|
|
if (!ceph_osd_is_up(osdc->osdmap, osd->o_osd) ||
|
|
memcmp(&osd->o_con.peer_addr,
|
|
ceph_osd_addr(osdc->osdmap,
|
|
osd->o_osd),
|
|
sizeof(struct ceph_entity_addr)) != 0)
|
|
__reset_osd(osdc, osd);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Requeue requests whose mapping to an OSD has changed. If requests map to
|
|
* no osd, request a new map.
|
|
*
|
|
* Caller should hold map_sem for read.
|
|
*/
|
|
static void kick_requests(struct ceph_osd_client *osdc, bool force_resend,
|
|
bool force_resend_writes)
|
|
{
|
|
struct ceph_osd_request *req, *nreq;
|
|
struct rb_node *p;
|
|
int needmap = 0;
|
|
int err;
|
|
bool force_resend_req;
|
|
|
|
dout("kick_requests %s %s\n", force_resend ? " (force resend)" : "",
|
|
force_resend_writes ? " (force resend writes)" : "");
|
|
mutex_lock(&osdc->request_mutex);
|
|
for (p = rb_first(&osdc->requests); p; ) {
|
|
req = rb_entry(p, struct ceph_osd_request, r_node);
|
|
p = rb_next(p);
|
|
|
|
/*
|
|
* For linger requests that have not yet been
|
|
* registered, move them to the linger list; they'll
|
|
* be sent to the osd in the loop below. Unregister
|
|
* the request before re-registering it as a linger
|
|
* request to ensure the __map_request() below
|
|
* will decide it needs to be sent.
|
|
*/
|
|
if (req->r_linger && list_empty(&req->r_linger_item)) {
|
|
dout("%p tid %llu restart on osd%d\n",
|
|
req, req->r_tid,
|
|
req->r_osd ? req->r_osd->o_osd : -1);
|
|
ceph_osdc_get_request(req);
|
|
__unregister_request(osdc, req);
|
|
__register_linger_request(osdc, req);
|
|
ceph_osdc_put_request(req);
|
|
continue;
|
|
}
|
|
|
|
force_resend_req = force_resend ||
|
|
(force_resend_writes &&
|
|
req->r_flags & CEPH_OSD_FLAG_WRITE);
|
|
err = __map_request(osdc, req, force_resend_req);
|
|
if (err < 0)
|
|
continue; /* error */
|
|
if (req->r_osd == NULL) {
|
|
dout("%p tid %llu maps to no osd\n", req, req->r_tid);
|
|
needmap++; /* request a newer map */
|
|
} else if (err > 0) {
|
|
if (!req->r_linger) {
|
|
dout("%p tid %llu requeued on osd%d\n", req,
|
|
req->r_tid,
|
|
req->r_osd ? req->r_osd->o_osd : -1);
|
|
req->r_flags |= CEPH_OSD_FLAG_RETRY;
|
|
}
|
|
}
|
|
}
|
|
|
|
list_for_each_entry_safe(req, nreq, &osdc->req_linger,
|
|
r_linger_item) {
|
|
dout("linger req=%p req->r_osd=%p\n", req, req->r_osd);
|
|
|
|
err = __map_request(osdc, req,
|
|
force_resend || force_resend_writes);
|
|
dout("__map_request returned %d\n", err);
|
|
if (err == 0)
|
|
continue; /* no change and no osd was specified */
|
|
if (err < 0)
|
|
continue; /* hrm! */
|
|
if (req->r_osd == NULL) {
|
|
dout("tid %llu maps to no valid osd\n", req->r_tid);
|
|
needmap++; /* request a newer map */
|
|
continue;
|
|
}
|
|
|
|
dout("kicking lingering %p tid %llu osd%d\n", req, req->r_tid,
|
|
req->r_osd ? req->r_osd->o_osd : -1);
|
|
__register_request(osdc, req);
|
|
__unregister_linger_request(osdc, req);
|
|
}
|
|
reset_changed_osds(osdc);
|
|
mutex_unlock(&osdc->request_mutex);
|
|
|
|
if (needmap) {
|
|
dout("%d requests for down osds, need new map\n", needmap);
|
|
ceph_monc_request_next_osdmap(&osdc->client->monc);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Process updated osd map.
|
|
*
|
|
* The message contains any number of incremental and full maps, normally
|
|
* indicating some sort of topology change in the cluster. Kick requests
|
|
* off to different OSDs as needed.
|
|
*/
|
|
void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg)
|
|
{
|
|
void *p, *end, *next;
|
|
u32 nr_maps, maplen;
|
|
u32 epoch;
|
|
struct ceph_osdmap *newmap = NULL, *oldmap;
|
|
int err;
|
|
struct ceph_fsid fsid;
|
|
bool was_full;
|
|
|
|
dout("handle_map have %u\n", osdc->osdmap ? osdc->osdmap->epoch : 0);
|
|
p = msg->front.iov_base;
|
|
end = p + msg->front.iov_len;
|
|
|
|
/* verify fsid */
|
|
ceph_decode_need(&p, end, sizeof(fsid), bad);
|
|
ceph_decode_copy(&p, &fsid, sizeof(fsid));
|
|
if (ceph_check_fsid(osdc->client, &fsid) < 0)
|
|
return;
|
|
|
|
down_write(&osdc->map_sem);
|
|
|
|
was_full = ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL);
|
|
|
|
/* incremental maps */
|
|
ceph_decode_32_safe(&p, end, nr_maps, bad);
|
|
dout(" %d inc maps\n", nr_maps);
|
|
while (nr_maps > 0) {
|
|
ceph_decode_need(&p, end, 2*sizeof(u32), bad);
|
|
epoch = ceph_decode_32(&p);
|
|
maplen = ceph_decode_32(&p);
|
|
ceph_decode_need(&p, end, maplen, bad);
|
|
next = p + maplen;
|
|
if (osdc->osdmap && osdc->osdmap->epoch+1 == epoch) {
|
|
dout("applying incremental map %u len %d\n",
|
|
epoch, maplen);
|
|
newmap = osdmap_apply_incremental(&p, next,
|
|
osdc->osdmap,
|
|
&osdc->client->msgr);
|
|
if (IS_ERR(newmap)) {
|
|
err = PTR_ERR(newmap);
|
|
goto bad;
|
|
}
|
|
BUG_ON(!newmap);
|
|
if (newmap != osdc->osdmap) {
|
|
ceph_osdmap_destroy(osdc->osdmap);
|
|
osdc->osdmap = newmap;
|
|
}
|
|
was_full = was_full ||
|
|
ceph_osdmap_flag(osdc->osdmap,
|
|
CEPH_OSDMAP_FULL);
|
|
kick_requests(osdc, 0, was_full);
|
|
} else {
|
|
dout("ignoring incremental map %u len %d\n",
|
|
epoch, maplen);
|
|
}
|
|
p = next;
|
|
nr_maps--;
|
|
}
|
|
if (newmap)
|
|
goto done;
|
|
|
|
/* full maps */
|
|
ceph_decode_32_safe(&p, end, nr_maps, bad);
|
|
dout(" %d full maps\n", nr_maps);
|
|
while (nr_maps) {
|
|
ceph_decode_need(&p, end, 2*sizeof(u32), bad);
|
|
epoch = ceph_decode_32(&p);
|
|
maplen = ceph_decode_32(&p);
|
|
ceph_decode_need(&p, end, maplen, bad);
|
|
if (nr_maps > 1) {
|
|
dout("skipping non-latest full map %u len %d\n",
|
|
epoch, maplen);
|
|
} else if (osdc->osdmap && osdc->osdmap->epoch >= epoch) {
|
|
dout("skipping full map %u len %d, "
|
|
"older than our %u\n", epoch, maplen,
|
|
osdc->osdmap->epoch);
|
|
} else {
|
|
int skipped_map = 0;
|
|
|
|
dout("taking full map %u len %d\n", epoch, maplen);
|
|
newmap = osdmap_decode(&p, p+maplen);
|
|
if (IS_ERR(newmap)) {
|
|
err = PTR_ERR(newmap);
|
|
goto bad;
|
|
}
|
|
BUG_ON(!newmap);
|
|
oldmap = osdc->osdmap;
|
|
osdc->osdmap = newmap;
|
|
if (oldmap) {
|
|
if (oldmap->epoch + 1 < newmap->epoch)
|
|
skipped_map = 1;
|
|
ceph_osdmap_destroy(oldmap);
|
|
}
|
|
was_full = was_full ||
|
|
ceph_osdmap_flag(osdc->osdmap,
|
|
CEPH_OSDMAP_FULL);
|
|
kick_requests(osdc, skipped_map, was_full);
|
|
}
|
|
p += maplen;
|
|
nr_maps--;
|
|
}
|
|
|
|
if (!osdc->osdmap)
|
|
goto bad;
|
|
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_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSERD) ||
|
|
ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_PAUSEWR))
|
|
ceph_monc_request_next_osdmap(&osdc->client->monc);
|
|
|
|
mutex_lock(&osdc->request_mutex);
|
|
__send_queued(osdc);
|
|
mutex_unlock(&osdc->request_mutex);
|
|
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 *),
|
|
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 = 0;
|
|
event->data = data;
|
|
event->osdc = osdc;
|
|
INIT_LIST_HEAD(&event->osd_node);
|
|
RB_CLEAR_NODE(&event->node);
|
|
kref_init(&event->kref); /* one ref for us */
|
|
kref_get(&event->kref); /* one ref for the caller */
|
|
|
|
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);
|
|
dout("do_event_work completed %p\n", event);
|
|
ceph_osdc_put_event(event);
|
|
kfree(event_work);
|
|
}
|
|
|
|
|
|
/*
|
|
* Process osd watch notifications
|
|
*/
|
|
static 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) {
|
|
BUG_ON(event->one_shot);
|
|
get_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:
|
|
ceph_osdc_put_event(event);
|
|
return;
|
|
|
|
bad:
|
|
pr_err("osdc handle_watch_notify corrupt msg\n");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* build new request AND message
|
|
*
|
|
*/
|
|
void ceph_osdc_build_request(struct ceph_osd_request *req, u64 off,
|
|
struct ceph_snap_context *snapc, u64 snap_id,
|
|
struct timespec *mtime)
|
|
{
|
|
struct ceph_msg *msg = req->r_request;
|
|
void *p;
|
|
size_t msg_size;
|
|
int flags = req->r_flags;
|
|
u64 data_len;
|
|
unsigned int i;
|
|
|
|
req->r_snapid = snap_id;
|
|
req->r_snapc = ceph_get_snap_context(snapc);
|
|
|
|
/* encode request */
|
|
msg->hdr.version = cpu_to_le16(4);
|
|
|
|
p = msg->front.iov_base;
|
|
ceph_encode_32(&p, 1); /* client_inc is always 1 */
|
|
req->r_request_osdmap_epoch = p;
|
|
p += 4;
|
|
req->r_request_flags = p;
|
|
p += 4;
|
|
if (req->r_flags & CEPH_OSD_FLAG_WRITE)
|
|
ceph_encode_timespec(p, mtime);
|
|
p += sizeof(struct ceph_timespec);
|
|
req->r_request_reassert_version = p;
|
|
p += sizeof(struct ceph_eversion); /* will get filled in */
|
|
|
|
/* oloc */
|
|
ceph_encode_8(&p, 4);
|
|
ceph_encode_8(&p, 4);
|
|
ceph_encode_32(&p, 8 + 4 + 4);
|
|
req->r_request_pool = p;
|
|
p += 8;
|
|
ceph_encode_32(&p, -1); /* preferred */
|
|
ceph_encode_32(&p, 0); /* key len */
|
|
|
|
ceph_encode_8(&p, 1);
|
|
req->r_request_pgid = p;
|
|
p += 8 + 4;
|
|
ceph_encode_32(&p, -1); /* preferred */
|
|
|
|
/* oid */
|
|
ceph_encode_32(&p, req->r_base_oid.name_len);
|
|
memcpy(p, req->r_base_oid.name, req->r_base_oid.name_len);
|
|
dout("oid '%.*s' len %d\n", req->r_base_oid.name_len,
|
|
req->r_base_oid.name, req->r_base_oid.name_len);
|
|
p += req->r_base_oid.name_len;
|
|
|
|
/* ops--can imply data */
|
|
ceph_encode_16(&p, (u16)req->r_num_ops);
|
|
data_len = 0;
|
|
for (i = 0; i < req->r_num_ops; i++) {
|
|
data_len += osd_req_encode_op(req, p, i);
|
|
p += sizeof(struct ceph_osd_op);
|
|
}
|
|
|
|
/* snaps */
|
|
ceph_encode_64(&p, req->r_snapid);
|
|
ceph_encode_64(&p, req->r_snapc ? req->r_snapc->seq : 0);
|
|
ceph_encode_32(&p, req->r_snapc ? req->r_snapc->num_snaps : 0);
|
|
if (req->r_snapc) {
|
|
for (i = 0; i < snapc->num_snaps; i++) {
|
|
ceph_encode_64(&p, req->r_snapc->snaps[i]);
|
|
}
|
|
}
|
|
|
|
req->r_request_attempts = p;
|
|
p += 4;
|
|
|
|
/* data */
|
|
if (flags & CEPH_OSD_FLAG_WRITE) {
|
|
u16 data_off;
|
|
|
|
/*
|
|
* The header "data_off" is a hint to the receiver
|
|
* allowing it to align received data into its
|
|
* buffers such that there's no need to re-copy
|
|
* it before writing it to disk (direct I/O).
|
|
*/
|
|
data_off = (u16) (off & 0xffff);
|
|
req->r_request->hdr.data_off = cpu_to_le16(data_off);
|
|
}
|
|
req->r_request->hdr.data_len = cpu_to_le32(data_len);
|
|
|
|
BUG_ON(p > msg->front.iov_base + msg->front.iov_len);
|
|
msg_size = p - msg->front.iov_base;
|
|
msg->front.iov_len = msg_size;
|
|
msg->hdr.front_len = cpu_to_le32(msg_size);
|
|
|
|
dout("build_request msg_size was %d\n", (int)msg_size);
|
|
}
|
|
EXPORT_SYMBOL(ceph_osdc_build_request);
|
|
|
|
/*
|
|
* Register request, send initial attempt.
|
|
*/
|
|
int ceph_osdc_start_request(struct ceph_osd_client *osdc,
|
|
struct ceph_osd_request *req,
|
|
bool nofail)
|
|
{
|
|
int rc;
|
|
|
|
down_read(&osdc->map_sem);
|
|
mutex_lock(&osdc->request_mutex);
|
|
|
|
rc = __ceph_osdc_start_request(osdc, req, nofail);
|
|
|
|
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);
|
|
|
|
/*
|
|
* Call all pending notify callbacks - for use after a watch is
|
|
* unregistered, to make sure no more callbacks for it will be invoked
|
|
*/
|
|
extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc)
|
|
{
|
|
flush_workqueue(osdc->notify_wq);
|
|
}
|
|
EXPORT_SYMBOL(ceph_osdc_flush_notifies);
|
|
|
|
|
|
/*
|
|
* init, shutdown
|
|
*/
|
|
int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
|
|
{
|
|
int err;
|
|
|
|
dout("init\n");
|
|
osdc->client = client;
|
|
osdc->osdmap = NULL;
|
|
init_rwsem(&osdc->map_sem);
|
|
init_completion(&osdc->map_waiters);
|
|
osdc->last_requested_map = 0;
|
|
mutex_init(&osdc->request_mutex);
|
|
osdc->last_tid = 0;
|
|
osdc->osds = RB_ROOT;
|
|
INIT_LIST_HEAD(&osdc->osd_lru);
|
|
osdc->requests = RB_ROOT;
|
|
INIT_LIST_HEAD(&osdc->req_lru);
|
|
INIT_LIST_HEAD(&osdc->req_unsent);
|
|
INIT_LIST_HEAD(&osdc->req_notarget);
|
|
INIT_LIST_HEAD(&osdc->req_linger);
|
|
osdc->num_requests = 0;
|
|
INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
|
|
INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
|
|
spin_lock_init(&osdc->event_lock);
|
|
osdc->event_tree = RB_ROOT;
|
|
osdc->event_count = 0;
|
|
|
|
schedule_delayed_work(&osdc->osds_timeout_work,
|
|
round_jiffies_relative(osdc->client->options->osd_idle_ttl * HZ));
|
|
|
|
err = -ENOMEM;
|
|
osdc->req_mempool = mempool_create_kmalloc_pool(10,
|
|
sizeof(struct ceph_osd_request));
|
|
if (!osdc->req_mempool)
|
|
goto out;
|
|
|
|
err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP,
|
|
OSD_OP_FRONT_LEN, 10, true,
|
|
"osd_op");
|
|
if (err < 0)
|
|
goto out_mempool;
|
|
err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY,
|
|
OSD_OPREPLY_FRONT_LEN, 10, true,
|
|
"osd_op_reply");
|
|
if (err < 0)
|
|
goto out_msgpool;
|
|
|
|
err = -ENOMEM;
|
|
osdc->notify_wq = create_singlethread_workqueue("ceph-watch-notify");
|
|
if (!osdc->notify_wq)
|
|
goto out_msgpool_reply;
|
|
|
|
return 0;
|
|
|
|
out_msgpool_reply:
|
|
ceph_msgpool_destroy(&osdc->msgpool_op_reply);
|
|
out_msgpool:
|
|
ceph_msgpool_destroy(&osdc->msgpool_op);
|
|
out_mempool:
|
|
mempool_destroy(osdc->req_mempool);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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, 1,
|
|
CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ,
|
|
NULL, truncate_seq, truncate_size,
|
|
false);
|
|
if (IS_ERR(req))
|
|
return PTR_ERR(req);
|
|
|
|
/* it may be a short read due to an object boundary */
|
|
|
|
osd_req_op_extent_osd_data_pages(req, 0,
|
|
pages, *plen, page_align, false, false);
|
|
|
|
dout("readpages final extent is %llu~%llu (%llu bytes align %d)\n",
|
|
off, *plen, *plen, page_align);
|
|
|
|
ceph_osdc_build_request(req, off, NULL, vino.snap, NULL);
|
|
|
|
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)
|
|
{
|
|
struct ceph_osd_request *req;
|
|
int rc = 0;
|
|
int page_align = off & ~PAGE_MASK;
|
|
|
|
BUG_ON(vino.snap != CEPH_NOSNAP); /* snapshots aren't writeable */
|
|
req = ceph_osdc_new_request(osdc, layout, vino, off, &len, 1,
|
|
CEPH_OSD_OP_WRITE,
|
|
CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
|
|
snapc, truncate_seq, truncate_size,
|
|
true);
|
|
if (IS_ERR(req))
|
|
return PTR_ERR(req);
|
|
|
|
/* it may be a short write due to an object boundary */
|
|
osd_req_op_extent_osd_data_pages(req, 0, pages, len, page_align,
|
|
false, false);
|
|
dout("writepages %llu~%llu (%llu bytes)\n", off, len, len);
|
|
|
|
ceph_osdc_build_request(req, off, snapc, CEPH_NOSNAP, mtime);
|
|
|
|
rc = ceph_osdc_start_request(osdc, req, true);
|
|
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);
|
|
|
|
int ceph_osdc_setup(void)
|
|
{
|
|
BUG_ON(ceph_osd_request_cache);
|
|
ceph_osd_request_cache = kmem_cache_create("ceph_osd_request",
|
|
sizeof (struct ceph_osd_request),
|
|
__alignof__(struct ceph_osd_request),
|
|
0, NULL);
|
|
|
|
return ceph_osd_request_cache ? 0 : -ENOMEM;
|
|
}
|
|
EXPORT_SYMBOL(ceph_osdc_setup);
|
|
|
|
void ceph_osdc_cleanup(void)
|
|
{
|
|
BUG_ON(!ceph_osd_request_cache);
|
|
kmem_cache_destroy(ceph_osd_request_cache);
|
|
ceph_osd_request_cache = NULL;
|
|
}
|
|
EXPORT_SYMBOL(ceph_osdc_cleanup);
|
|
|
|
/*
|
|
* 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_len = 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;
|
|
dout("get_reply unknown tid %llu from osd%d\n", tid,
|
|
osd->o_osd);
|
|
goto out;
|
|
}
|
|
|
|
if (req->r_reply->con)
|
|
dout("%s revoking msg %p from old con %p\n", __func__,
|
|
req->r_reply, req->r_reply->con);
|
|
ceph_msg_revoke_incoming(req->r_reply);
|
|
|
|
if (front_len > req->r_reply->front_alloc_len) {
|
|
pr_warning("get_reply front %d > preallocated %d (%u#%llu)\n",
|
|
front_len, req->r_reply->front_alloc_len,
|
|
(unsigned int)con->peer_name.type,
|
|
le64_to_cpu(con->peer_name.num));
|
|
m = ceph_msg_new(CEPH_MSG_OSD_OPREPLY, front_len, GFP_NOFS,
|
|
false);
|
|
if (!m)
|
|
goto out;
|
|
ceph_msg_put(req->r_reply);
|
|
req->r_reply = m;
|
|
}
|
|
m = ceph_msg_get(req->r_reply);
|
|
|
|
if (data_len > 0) {
|
|
struct ceph_osd_data *osd_data;
|
|
|
|
/*
|
|
* XXX This is assuming there is only one op containing
|
|
* XXX page data. Probably OK for reads, but this
|
|
* XXX ought to be done more generally.
|
|
*/
|
|
osd_data = osd_req_op_extent_osd_data(req, 0);
|
|
if (osd_data->type == CEPH_OSD_DATA_TYPE_PAGES) {
|
|
if (osd_data->pages &&
|
|
unlikely(osd_data->length < data_len)) {
|
|
|
|
pr_warning("tid %lld reply has %d bytes "
|
|
"we had only %llu bytes ready\n",
|
|
tid, data_len, osd_data->length);
|
|
*skip = 1;
|
|
ceph_msg_put(m);
|
|
m = NULL;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
*skip = 0;
|
|
dout("get_reply tid %lld %p\n", tid, m);
|
|
|
|
out:
|
|
mutex_unlock(&osdc->request_mutex);
|
|
return m;
|
|
|
|
}
|
|
|
|
static struct ceph_msg *alloc_msg(struct ceph_connection *con,
|
|
struct ceph_msg_header *hdr,
|
|
int *skip)
|
|
{
|
|
struct ceph_osd *osd = con->private;
|
|
int type = le16_to_cpu(hdr->type);
|
|
int front = le32_to_cpu(hdr->front_len);
|
|
|
|
*skip = 0;
|
|
switch (type) {
|
|
case CEPH_MSG_OSD_MAP:
|
|
case CEPH_MSG_WATCH_NOTIFY:
|
|
return ceph_msg_new(type, front, GFP_NOFS, false);
|
|
case CEPH_MSG_OSD_OPREPLY:
|
|
return get_reply(con, hdr, skip);
|
|
default:
|
|
pr_info("alloc_msg unexpected msg type %d from osd%d\n", type,
|
|
osd->o_osd);
|
|
*skip = 1;
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Wrappers to refcount containing ceph_osd struct
|
|
*/
|
|
static struct ceph_connection *get_osd_con(struct ceph_connection *con)
|
|
{
|
|
struct ceph_osd *osd = con->private;
|
|
if (get_osd(osd))
|
|
return con;
|
|
return NULL;
|
|
}
|
|
|
|
static void put_osd_con(struct ceph_connection *con)
|
|
{
|
|
struct ceph_osd *osd = con->private;
|
|
put_osd(osd);
|
|
}
|
|
|
|
/*
|
|
* authentication
|
|
*/
|
|
/*
|
|
* Note: returned pointer is the address of a structure that's
|
|
* managed separately. Caller must *not* attempt to free it.
|
|
*/
|
|
static struct ceph_auth_handshake *get_authorizer(struct ceph_connection *con,
|
|
int *proto, int force_new)
|
|
{
|
|
struct ceph_osd *o = con->private;
|
|
struct ceph_osd_client *osdc = o->o_osdc;
|
|
struct ceph_auth_client *ac = osdc->client->monc.auth;
|
|
struct ceph_auth_handshake *auth = &o->o_auth;
|
|
|
|
if (force_new && auth->authorizer) {
|
|
ceph_auth_destroy_authorizer(ac, auth->authorizer);
|
|
auth->authorizer = NULL;
|
|
}
|
|
if (!auth->authorizer) {
|
|
int ret = ceph_auth_create_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
|
|
auth);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
} else {
|
|
int ret = ceph_auth_update_authorizer(ac, CEPH_ENTITY_TYPE_OSD,
|
|
auth);
|
|
if (ret)
|
|
return ERR_PTR(ret);
|
|
}
|
|
*proto = ac->protocol;
|
|
|
|
return auth;
|
|
}
|
|
|
|
|
|
static int verify_authorizer_reply(struct ceph_connection *con, int len)
|
|
{
|
|
struct ceph_osd *o = con->private;
|
|
struct ceph_osd_client *osdc = o->o_osdc;
|
|
struct ceph_auth_client *ac = osdc->client->monc.auth;
|
|
|
|
return ceph_auth_verify_authorizer_reply(ac, o->o_auth.authorizer, len);
|
|
}
|
|
|
|
static int invalidate_authorizer(struct ceph_connection *con)
|
|
{
|
|
struct ceph_osd *o = con->private;
|
|
struct ceph_osd_client *osdc = o->o_osdc;
|
|
struct ceph_auth_client *ac = osdc->client->monc.auth;
|
|
|
|
ceph_auth_invalidate_authorizer(ac, CEPH_ENTITY_TYPE_OSD);
|
|
return ceph_monc_validate_auth(&osdc->client->monc);
|
|
}
|
|
|
|
static const struct ceph_connection_operations osd_con_ops = {
|
|
.get = get_osd_con,
|
|
.put = put_osd_con,
|
|
.dispatch = dispatch,
|
|
.get_authorizer = get_authorizer,
|
|
.verify_authorizer_reply = verify_authorizer_reply,
|
|
.invalidate_authorizer = invalidate_authorizer,
|
|
.alloc_msg = alloc_msg,
|
|
.fault = osd_reset,
|
|
};
|