*/
#define DRBD_SIGKILL SIGHUP
-/* All EEs on the free list should have ID_VACANT (== 0)
- * freshly allocated EEs get !ID_VACANT (== 1)
- * so if it says "cannot dereference null pointer at address 0x00000001",
- * it is most likely one of these :( */
-
#define ID_IN_SYNC (4711ULL)
#define ID_OUT_OF_SYNC (4712ULL)
-
#define ID_SYNCER (-1ULL)
-#define ID_VACANT 0
-#define is_syncer_block_id(id) ((id) == ID_SYNCER)
+
#define UUID_NEW_BM_OFFSET ((u64)0x0001000000000000ULL)
struct drbd_conf;
+struct drbd_tconn;
/* to shorten dev_warn(DEV, "msg"); and relatives statements */
#define D_ASSERT(exp) if (!(exp)) \
dev_err(DEV, "ASSERT( " #exp " ) in %s:%d\n", __FILE__, __LINE__)
-#define ERR_IF(exp) if (({ \
- int _b = (exp) != 0; \
- if (_b) dev_err(DEV, "ASSERT FAILED: %s: (%s) in %s:%d\n", \
- __func__, #exp, __FILE__, __LINE__); \
- _b; \
- }))
+/**
+ * expect - Make an assertion
+ *
+ * Unlike the assert macro, this macro returns a boolean result.
+ */
+#define expect(exp) ({ \
+ bool _bool = (exp); \
+ if (!_bool) \
+ dev_err(DEV, "ASSERTION %s FAILED in %s\n", \
+ #exp, __func__); \
+ _bool; \
+ })
/* Defines to control fault insertion */
enum {
/**********************************************************************/
enum drbd_thread_state {
- None,
- Running,
- Exiting,
- Restarting
+ NONE,
+ RUNNING,
+ EXITING,
+ RESTARTING
};
struct drbd_thread {
drbd_work_cb cb;
};
-struct drbd_tl_epoch;
+#include "drbd_interval.h"
+
struct drbd_request {
struct drbd_work w;
struct drbd_conf *mdev;
* see drbd_endio_pri(). */
struct bio *private_bio;
- struct hlist_node collision;
- sector_t sector;
- unsigned int size;
+ struct drbd_interval i;
unsigned int epoch; /* barrier_nr */
/* barrier_nr: used to check on "completion" whether this req was in
struct drbd_epoch_entry {
struct drbd_work w;
- struct hlist_node collision;
struct drbd_epoch *epoch; /* for writes */
struct drbd_conf *mdev;
struct page *pages;
atomic_t pending_bios;
- unsigned int size;
+ struct drbd_interval i;
/* see comments on ee flag bits below */
unsigned long flags;
- sector_t sector;
union {
u64 block_id;
struct digest_info *digest;
unsigned int size;
};
+struct drbd_tconn { /* is a resource from the config file */
+ char *name; /* Resource name */
+ struct list_head all_tconn; /* List of all drbd_tconn, prot by global_state_lock */
+ struct drbd_conf *volume0; /* TODO: Remove me again */
+
+ struct net_conf *net_conf; /* protected by get_net_conf() and put_net_conf() */
+};
+
struct drbd_conf {
+ struct drbd_tconn *tconn;
+ int vnr; /* volume number within the connection */
+
/* things that are stored as / read from meta data on disk */
unsigned long flags;
struct drbd_tl_epoch *newest_tle;
struct drbd_tl_epoch *oldest_tle;
struct list_head out_of_sequence_requests;
- struct hlist_head *tl_hash;
- unsigned int tl_hash_s;
+
+ /* Interval tree of pending local requests */
+ struct rb_root read_requests;
+ struct rb_root write_requests;
/* blocks to resync in this run [unit BM_BLOCK_SIZE] */
unsigned long rs_total;
struct list_head done_ee; /* send ack */
struct list_head read_ee; /* IO in progress (any read) */
struct list_head net_ee; /* zero-copy network send in progress */
- struct hlist_head *ee_hash; /* is proteced by req_lock! */
- unsigned int ee_hash_s;
+
+ /* Interval tree of pending remote write requests (struct drbd_epoch_entry) */
+ struct rb_root epoch_entries;
/* this one is protected by ee_lock, single thread */
struct drbd_epoch_entry *last_write_w_barrier;
int next_barrier_nr;
- struct hlist_head *app_reads_hash; /* is proteced by req_lock */
struct list_head resync_reads;
atomic_t pp_in_use; /* allocated from page pool */
atomic_t pp_in_use_by_net; /* sendpage()d, still referenced by tcp */
#endif
#endif
-/* Sector shift value for the "hash" functions of tl_hash and ee_hash tables.
- * With a value of 8 all IO in one 128K block make it to the same slot of the
- * hash table. */
#define HT_SHIFT 8
#define DRBD_MAX_BIO_SIZE (1U<<(9+HT_SHIFT))
#define DRBD_MAX_BIO_SIZE_SAFE (1 << 12) /* Works always = 4k */
#define DRBD_MAX_SIZE_H80_PACKET (1 << 15) /* The old header only allows packets up to 32Kib data */
-/* Number of elements in the app_reads_hash */
-#define APP_R_HSIZE 15
-
extern int drbd_bm_init(struct drbd_conf *mdev);
extern int drbd_bm_resize(struct drbd_conf *mdev, sector_t sectors, int set_new_bits);
extern void drbd_bm_cleanup(struct drbd_conf *mdev);
extern struct drbd_conf *drbd_new_device(unsigned int minor);
extern void drbd_free_mdev(struct drbd_conf *mdev);
+struct drbd_tconn *drbd_new_tconn(char *name);
+extern void drbd_free_tconn(struct drbd_tconn *tconn);
+
extern int proc_details;
/* drbd_req */
extern void drbd_set_recv_tcq(struct drbd_conf *mdev, int tcq_enabled);
extern void _drbd_clear_done_ee(struct drbd_conf *mdev, struct list_head *to_be_freed);
extern void drbd_flush_workqueue(struct drbd_conf *mdev);
-extern void drbd_free_tl_hash(struct drbd_conf *mdev);
/* yes, there is kernel_setsockopt, but only since 2.6.18. we don't need to
* mess with get_fs/set_fs, we know we are KERNEL_DS always. */
* or implicit barrier packets as necessary.
* increased:
* w_send_barrier
- * _req_mod(req, queue_for_net_write or queue_for_net_read);
+ * _req_mod(req, QUEUE_FOR_NET_WRITE or QUEUE_FOR_NET_READ);
* it is much easier and equally valid to count what we queue for the
* worker, even before it actually was queued or send.
* (drbd_make_request_common; recovery path on read io-error)
* decreased:
* got_BarrierAck (respective tl_clear, tl_clear_barrier)
- * _req_mod(req, data_received)
+ * _req_mod(req, DATA_RECEIVED)
* [from receive_DataReply]
- * _req_mod(req, write_acked_by_peer or recv_acked_by_peer or neg_acked)
+ * _req_mod(req, WRITE_ACKED_BY_PEER or RECV_ACKED_BY_PEER or NEG_ACKED)
* [from got_BlockAck (P_WRITE_ACK, P_RECV_ACK)]
* for some reason it is NOT decreased in got_NegAck,
* but in the resulting cleanup code from report_params.
* we should try to remember the reason for that...
- * _req_mod(req, send_failed or send_canceled)
- * _req_mod(req, connection_lost_while_pending)
+ * _req_mod(req, SEND_FAILED or SEND_CANCELED)
+ * _req_mod(req, CONNECTION_LOST_WHILE_PENDING)
* [from tl_clear_barrier]
*/
static inline void inc_ap_pending(struct drbd_conf *mdev)
projects / linux-block.git / blobdiff