d63b77f4c5
If we encounter an invalid (e.g., zeroed) mapping, return an error and avoid a divide by zero. Signed-off-by: Sage Weil <sage@inktank.com> Reviewed-by: Alex Elder <elder@inktank.com>
295 lines
8.6 KiB
C
295 lines
8.6 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/auth.h>
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/*
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* Maximum object name size
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* (must be at least as big as RBD_MAX_MD_NAME_LEN -- currently 100)
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*/
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#define MAX_OBJ_NAME_SIZE 100
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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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struct ceph_authorizer;
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struct ceph_pagelist;
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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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struct ceph_msg *);
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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 list_head o_requests;
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struct list_head 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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int o_marked_for_keepalive;
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struct list_head o_keepalive_item;
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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 list_head r_req_lru_item;
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struct list_head r_osd_item;
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struct list_head r_linger_item;
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struct list_head r_linger_osd;
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struct ceph_osd *r_osd;
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struct ceph_pg r_pgid;
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int r_pg_osds[CEPH_PG_MAX_SIZE];
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int r_num_pg_osds;
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struct ceph_connection *r_con_filling_msg;
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struct ceph_msg *r_request, *r_reply;
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int r_result;
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int r_flags; /* any additional flags for the osd */
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u32 r_sent; /* >0 if r_request is sending/sent */
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int r_got_reply;
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int r_linger;
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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, r_safe_completion;
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ceph_osdc_callback_t r_callback, r_safe_callback;
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struct ceph_eversion r_reassert_version;
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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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char r_oid[MAX_OBJ_NAME_SIZE]; /* object name */
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int r_oid_len;
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unsigned long r_stamp; /* send OR check time */
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struct ceph_file_layout r_file_layout;
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struct ceph_snap_context *r_snapc; /* snap context for writes */
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unsigned r_num_pages; /* size of page array (follows) */
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unsigned r_page_alignment; /* io offset in first page */
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struct page **r_pages; /* pages for data payload */
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int r_pages_from_pool;
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int r_own_pages; /* if true, i own page list */
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#ifdef CONFIG_BLOCK
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struct bio *r_bio; /* instead of pages */
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#endif
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struct ceph_pagelist *r_trail; /* trailing part of the data */
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};
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struct ceph_osd_event {
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u64 cookie;
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int one_shot;
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struct ceph_osd_client *osdc;
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void (*cb)(u64, u64, u8, void *);
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void *data;
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struct rb_node node;
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struct list_head osd_node;
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struct kref kref;
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struct completion completion;
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};
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struct ceph_osd_event_work {
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struct work_struct work;
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struct ceph_osd_event *event;
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u64 ver;
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u64 notify_id;
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u8 opcode;
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};
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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 map_sem;
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struct completion map_waiters;
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u64 last_requested_map;
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struct mutex request_mutex;
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struct rb_root osds; /* osds */
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struct list_head osd_lru; /* idle osds */
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u64 timeout_tid; /* tid of timeout triggering rq */
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u64 last_tid; /* tid of last request */
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struct rb_root requests; /* pending requests */
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struct list_head req_lru; /* in-flight lru */
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struct list_head req_unsent; /* unsent/need-resend queue */
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struct list_head req_notarget; /* map to no osd */
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struct list_head req_linger; /* lingering requests */
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int num_requests;
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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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spinlock_t event_lock;
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struct rb_root event_tree;
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u64 event_count;
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struct workqueue_struct *notify_wq;
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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_FLAG_* */
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union {
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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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} extent;
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struct {
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const char *name;
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u32 name_len;
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const char *val;
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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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} xattr;
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struct {
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const char *class_name;
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__u8 class_len;
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const char *method_name;
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__u8 method_len;
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__u8 argc;
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const char *indata;
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u32 indata_len;
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} cls;
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struct {
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u64 cookie, count;
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} pgls;
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struct {
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u64 snapid;
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} snap;
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struct {
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u64 cookie;
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u64 ver;
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__u8 flag;
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u32 prot_ver;
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u32 timeout;
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} watch;
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};
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u32 payload_len;
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};
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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 int ceph_calc_raw_layout(struct ceph_osd_client *osdc,
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struct ceph_file_layout *layout,
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u64 snapid,
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u64 off, u64 *plen, u64 *bno,
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struct ceph_osd_request *req,
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struct ceph_osd_req_op *op);
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extern struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc,
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int flags,
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struct ceph_snap_context *snapc,
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struct ceph_osd_req_op *ops,
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bool use_mempool,
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gfp_t gfp_flags,
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struct page **pages,
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struct bio *bio);
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extern void ceph_osdc_build_request(struct ceph_osd_request *req,
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u64 off, u64 *plen,
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struct ceph_osd_req_op *src_ops,
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struct ceph_snap_context *snapc,
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struct timespec *mtime,
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const char *oid,
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int oid_len);
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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, int op, int flags,
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struct ceph_snap_context *snapc,
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int do_sync, u32 truncate_seq,
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u64 truncate_size,
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struct timespec *mtime,
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bool use_mempool, int num_reply,
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int page_align);
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extern void ceph_osdc_set_request_linger(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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extern void ceph_osdc_unregister_linger_request(struct ceph_osd_client *osdc,
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struct ceph_osd_request *req);
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static inline void ceph_osdc_get_request(struct ceph_osd_request *req)
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{
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kref_get(&req->r_kref);
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}
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extern void ceph_osdc_release_request(struct kref *kref);
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static inline void ceph_osdc_put_request(struct ceph_osd_request *req)
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{
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kref_put(&req->r_kref, ceph_osdc_release_request);
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}
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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 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 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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int flags, int do_sync, bool nofail);
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/* watch/notify events */
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extern int ceph_osdc_create_event(struct ceph_osd_client *osdc,
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void (*event_cb)(u64, u64, u8, void *),
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int one_shot, void *data,
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struct ceph_osd_event **pevent);
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extern void ceph_osdc_cancel_event(struct ceph_osd_event *event);
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extern int ceph_osdc_wait_event(struct ceph_osd_event *event,
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unsigned long timeout);
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extern void ceph_osdc_put_event(struct ceph_osd_event *event);
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#endif
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