462 lines
13 KiB
C
462 lines
13 KiB
C
#ifndef _FS_CEPH_OSD_CLIENT_H
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#define _FS_CEPH_OSD_CLIENT_H
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#include <linux/completion.h>
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#include <linux/kref.h>
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#include <linux/mempool.h>
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#include <linux/rbtree.h>
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#include <linux/ceph/types.h>
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#include <linux/ceph/osdmap.h>
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#include <linux/ceph/messenger.h>
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#include <linux/ceph/msgpool.h>
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#include <linux/ceph/auth.h>
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#include <linux/ceph/pagelist.h>
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struct ceph_msg;
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struct ceph_snap_context;
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struct ceph_osd_request;
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struct ceph_osd_client;
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/*
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* completion callback for async writepages
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*/
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typedef void (*ceph_osdc_callback_t)(struct ceph_osd_request *);
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typedef void (*ceph_osdc_unsafe_callback_t)(struct ceph_osd_request *, bool);
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#define CEPH_HOMELESS_OSD -1
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/* a given osd we're communicating with */
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struct ceph_osd {
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atomic_t o_ref;
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struct ceph_osd_client *o_osdc;
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int o_osd;
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int o_incarnation;
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struct rb_node o_node;
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struct ceph_connection o_con;
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struct rb_root o_requests;
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struct rb_root o_linger_requests;
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struct list_head o_osd_lru;
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struct ceph_auth_handshake o_auth;
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unsigned long lru_ttl;
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struct list_head o_keepalive_item;
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struct mutex lock;
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};
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#define CEPH_OSD_SLAB_OPS 2
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#define CEPH_OSD_MAX_OPS 16
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enum ceph_osd_data_type {
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CEPH_OSD_DATA_TYPE_NONE = 0,
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CEPH_OSD_DATA_TYPE_PAGES,
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CEPH_OSD_DATA_TYPE_PAGELIST,
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#ifdef CONFIG_BLOCK
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CEPH_OSD_DATA_TYPE_BIO,
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#endif /* CONFIG_BLOCK */
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};
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struct ceph_osd_data {
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enum ceph_osd_data_type type;
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union {
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struct {
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struct page **pages;
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u64 length;
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u32 alignment;
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bool pages_from_pool;
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bool own_pages;
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};
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struct ceph_pagelist *pagelist;
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#ifdef CONFIG_BLOCK
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struct {
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struct bio *bio; /* list of bios */
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size_t bio_length; /* total in list */
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};
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#endif /* CONFIG_BLOCK */
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};
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};
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struct ceph_osd_req_op {
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u16 op; /* CEPH_OSD_OP_* */
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u32 flags; /* CEPH_OSD_OP_FLAG_* */
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u32 indata_len; /* request */
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u32 outdata_len; /* reply */
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s32 rval;
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union {
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struct ceph_osd_data raw_data_in;
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struct {
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u64 offset, length;
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u64 truncate_size;
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u32 truncate_seq;
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struct ceph_osd_data osd_data;
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} extent;
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struct {
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u32 name_len;
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u32 value_len;
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__u8 cmp_op; /* CEPH_OSD_CMPXATTR_OP_* */
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__u8 cmp_mode; /* CEPH_OSD_CMPXATTR_MODE_* */
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struct ceph_osd_data osd_data;
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} xattr;
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struct {
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const char *class_name;
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const char *method_name;
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struct ceph_osd_data request_info;
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struct ceph_osd_data request_data;
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struct ceph_osd_data response_data;
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__u8 class_len;
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__u8 method_len;
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u32 indata_len;
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} cls;
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struct {
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u64 cookie;
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__u8 op; /* CEPH_OSD_WATCH_OP_ */
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u32 gen;
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} watch;
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struct {
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struct ceph_osd_data request_data;
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} notify_ack;
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struct {
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u64 cookie;
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struct ceph_osd_data request_data;
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struct ceph_osd_data response_data;
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} notify;
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struct {
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struct ceph_osd_data response_data;
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} list_watchers;
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struct {
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u64 expected_object_size;
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u64 expected_write_size;
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} alloc_hint;
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};
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};
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struct ceph_osd_request_target {
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struct ceph_object_id base_oid;
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struct ceph_object_locator base_oloc;
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struct ceph_object_id target_oid;
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struct ceph_object_locator target_oloc;
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struct ceph_pg pgid;
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u32 pg_num;
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u32 pg_num_mask;
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struct ceph_osds acting;
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struct ceph_osds up;
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int size;
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int min_size;
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bool sort_bitwise;
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unsigned int flags; /* CEPH_OSD_FLAG_* */
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bool paused;
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int osd;
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};
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/* an in-flight request */
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struct ceph_osd_request {
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u64 r_tid; /* unique for this client */
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struct rb_node r_node;
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struct rb_node r_mc_node; /* map check */
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struct ceph_osd *r_osd;
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struct ceph_osd_request_target r_t;
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#define r_base_oid r_t.base_oid
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#define r_base_oloc r_t.base_oloc
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#define r_flags r_t.flags
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struct ceph_msg *r_request, *r_reply;
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u32 r_sent; /* >0 if r_request is sending/sent */
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/* request osd ops array */
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unsigned int r_num_ops;
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int r_result;
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bool r_got_reply;
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struct ceph_osd_client *r_osdc;
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struct kref r_kref;
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bool r_mempool;
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struct completion r_completion;
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struct completion r_safe_completion; /* fsync waiter */
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ceph_osdc_callback_t r_callback;
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ceph_osdc_unsafe_callback_t r_unsafe_callback;
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struct list_head r_unsafe_item;
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struct inode *r_inode; /* for use by callbacks */
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void *r_priv; /* ditto */
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/* set by submitter */
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u64 r_snapid; /* for reads, CEPH_NOSNAP o/w */
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struct ceph_snap_context *r_snapc; /* for writes */
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struct timespec r_mtime; /* ditto */
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u64 r_data_offset; /* ditto */
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bool r_linger; /* don't resend on failure */
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/* internal */
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unsigned long r_stamp; /* jiffies, send or check time */
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int r_attempts;
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struct ceph_eversion r_replay_version; /* aka reassert_version */
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u32 r_last_force_resend;
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u32 r_map_dne_bound;
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struct ceph_osd_req_op r_ops[];
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};
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struct ceph_request_redirect {
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struct ceph_object_locator oloc;
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};
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typedef void (*rados_watchcb2_t)(void *arg, u64 notify_id, u64 cookie,
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u64 notifier_id, void *data, size_t data_len);
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typedef void (*rados_watcherrcb_t)(void *arg, u64 cookie, int err);
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struct ceph_osd_linger_request {
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struct ceph_osd_client *osdc;
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u64 linger_id;
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bool committed;
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bool is_watch; /* watch or notify */
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struct ceph_osd *osd;
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struct ceph_osd_request *reg_req;
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struct ceph_osd_request *ping_req;
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unsigned long ping_sent;
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unsigned long watch_valid_thru;
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struct list_head pending_lworks;
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struct ceph_osd_request_target t;
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u32 last_force_resend;
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u32 map_dne_bound;
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struct timespec mtime;
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struct kref kref;
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struct mutex lock;
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struct rb_node node; /* osd */
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struct rb_node osdc_node; /* osdc */
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struct rb_node mc_node; /* map check */
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struct list_head scan_item;
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struct completion reg_commit_wait;
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struct completion notify_finish_wait;
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int reg_commit_error;
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int notify_finish_error;
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int last_error;
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u32 register_gen;
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u64 notify_id;
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rados_watchcb2_t wcb;
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rados_watcherrcb_t errcb;
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void *data;
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struct page ***preply_pages;
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size_t *preply_len;
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};
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struct ceph_watch_item {
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struct ceph_entity_name name;
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u64 cookie;
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struct ceph_entity_addr addr;
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};
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#define CEPH_LINGER_ID_START 0xffff000000000000ULL
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struct ceph_osd_client {
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struct ceph_client *client;
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struct ceph_osdmap *osdmap; /* current map */
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struct rw_semaphore lock;
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struct rb_root osds; /* osds */
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struct list_head osd_lru; /* idle osds */
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spinlock_t osd_lru_lock;
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struct ceph_osd homeless_osd;
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atomic64_t last_tid; /* tid of last request */
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u64 last_linger_id;
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struct rb_root linger_requests; /* lingering requests */
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struct rb_root map_checks;
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struct rb_root linger_map_checks;
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atomic_t num_requests;
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atomic_t num_homeless;
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struct delayed_work timeout_work;
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struct delayed_work osds_timeout_work;
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#ifdef CONFIG_DEBUG_FS
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struct dentry *debugfs_file;
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#endif
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mempool_t *req_mempool;
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struct ceph_msgpool msgpool_op;
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struct ceph_msgpool msgpool_op_reply;
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struct workqueue_struct *notify_wq;
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};
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static inline bool ceph_osdmap_flag(struct ceph_osd_client *osdc, int flag)
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{
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return osdc->osdmap->flags & flag;
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}
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extern int ceph_osdc_setup(void);
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extern void ceph_osdc_cleanup(void);
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extern int ceph_osdc_init(struct ceph_osd_client *osdc,
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struct ceph_client *client);
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extern void ceph_osdc_stop(struct ceph_osd_client *osdc);
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extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
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struct ceph_msg *msg);
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extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
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struct ceph_msg *msg);
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extern void osd_req_op_init(struct ceph_osd_request *osd_req,
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unsigned int which, u16 opcode, u32 flags);
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extern void osd_req_op_raw_data_in_pages(struct ceph_osd_request *,
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unsigned int which,
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struct page **pages, u64 length,
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u32 alignment, bool pages_from_pool,
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bool own_pages);
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extern void osd_req_op_extent_init(struct ceph_osd_request *osd_req,
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unsigned int which, u16 opcode,
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u64 offset, u64 length,
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u64 truncate_size, u32 truncate_seq);
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extern void osd_req_op_extent_update(struct ceph_osd_request *osd_req,
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unsigned int which, u64 length);
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extern void osd_req_op_extent_dup_last(struct ceph_osd_request *osd_req,
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unsigned int which, u64 offset_inc);
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extern struct ceph_osd_data *osd_req_op_extent_osd_data(
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struct ceph_osd_request *osd_req,
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unsigned int which);
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extern void osd_req_op_extent_osd_data_pages(struct ceph_osd_request *,
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unsigned int which,
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struct page **pages, u64 length,
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u32 alignment, bool pages_from_pool,
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bool own_pages);
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extern void osd_req_op_extent_osd_data_pagelist(struct ceph_osd_request *,
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unsigned int which,
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struct ceph_pagelist *pagelist);
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#ifdef CONFIG_BLOCK
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extern void osd_req_op_extent_osd_data_bio(struct ceph_osd_request *,
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unsigned int which,
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struct bio *bio, size_t bio_length);
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#endif /* CONFIG_BLOCK */
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extern void osd_req_op_cls_request_data_pagelist(struct ceph_osd_request *,
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unsigned int which,
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struct ceph_pagelist *pagelist);
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extern void osd_req_op_cls_request_data_pages(struct ceph_osd_request *,
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unsigned int which,
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struct page **pages, u64 length,
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u32 alignment, bool pages_from_pool,
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bool own_pages);
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extern void osd_req_op_cls_response_data_pages(struct ceph_osd_request *,
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unsigned int which,
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struct page **pages, u64 length,
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u32 alignment, bool pages_from_pool,
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bool own_pages);
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extern void osd_req_op_cls_init(struct ceph_osd_request *osd_req,
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unsigned int which, u16 opcode,
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const char *class, const char *method);
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extern int osd_req_op_xattr_init(struct ceph_osd_request *osd_req, unsigned int which,
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u16 opcode, const char *name, const void *value,
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size_t size, u8 cmp_op, u8 cmp_mode);
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extern void osd_req_op_alloc_hint_init(struct ceph_osd_request *osd_req,
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unsigned int which,
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u64 expected_object_size,
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u64 expected_write_size);
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extern 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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int ceph_osdc_alloc_messages(struct ceph_osd_request *req, gfp_t gfp);
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extern struct ceph_osd_request *ceph_osdc_new_request(struct ceph_osd_client *,
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struct ceph_file_layout *layout,
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struct ceph_vino vino,
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u64 offset, u64 *len,
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unsigned int which, int num_ops,
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int opcode, int flags,
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struct ceph_snap_context *snapc,
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u32 truncate_seq, u64 truncate_size,
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bool use_mempool);
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extern void ceph_osdc_get_request(struct ceph_osd_request *req);
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extern void ceph_osdc_put_request(struct ceph_osd_request *req);
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extern int ceph_osdc_start_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req,
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bool nofail);
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extern void ceph_osdc_cancel_request(struct ceph_osd_request *req);
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extern int ceph_osdc_wait_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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extern void ceph_osdc_sync(struct ceph_osd_client *osdc);
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extern void ceph_osdc_flush_notifies(struct ceph_osd_client *osdc);
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void ceph_osdc_maybe_request_map(struct ceph_osd_client *osdc);
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int ceph_osdc_call(struct ceph_osd_client *osdc,
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struct ceph_object_id *oid,
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struct ceph_object_locator *oloc,
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const char *class, const char *method,
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unsigned int flags,
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struct page *req_page, size_t req_len,
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struct page *resp_page, size_t *resp_len);
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extern int ceph_osdc_readpages(struct ceph_osd_client *osdc,
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struct ceph_vino vino,
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struct ceph_file_layout *layout,
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u64 off, u64 *plen,
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u32 truncate_seq, u64 truncate_size,
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struct page **pages, int nr_pages,
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int page_align);
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extern int ceph_osdc_writepages(struct ceph_osd_client *osdc,
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struct ceph_vino vino,
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struct ceph_file_layout *layout,
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struct ceph_snap_context *sc,
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u64 off, u64 len,
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u32 truncate_seq, u64 truncate_size,
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struct timespec *mtime,
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struct page **pages, int nr_pages);
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/* watch/notify */
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struct ceph_osd_linger_request *
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ceph_osdc_watch(struct ceph_osd_client *osdc,
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struct ceph_object_id *oid,
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struct ceph_object_locator *oloc,
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rados_watchcb2_t wcb,
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rados_watcherrcb_t errcb,
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void *data);
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int ceph_osdc_unwatch(struct ceph_osd_client *osdc,
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struct ceph_osd_linger_request *lreq);
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int ceph_osdc_notify_ack(struct ceph_osd_client *osdc,
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struct ceph_object_id *oid,
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struct ceph_object_locator *oloc,
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u64 notify_id,
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u64 cookie,
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void *payload,
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size_t payload_len);
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int ceph_osdc_notify(struct ceph_osd_client *osdc,
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struct ceph_object_id *oid,
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struct ceph_object_locator *oloc,
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void *payload,
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size_t payload_len,
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u32 timeout,
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struct page ***preply_pages,
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size_t *preply_len);
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int ceph_osdc_watch_check(struct ceph_osd_client *osdc,
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struct ceph_osd_linger_request *lreq);
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int ceph_osdc_list_watchers(struct ceph_osd_client *osdc,
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struct ceph_object_id *oid,
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struct ceph_object_locator *oloc,
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struct ceph_watch_item **watchers,
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u32 *num_watchers);
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#endif
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