* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
+ * Copyright (c) 2011 Whamcloud, Inc.
+ */
+/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*/
+/** \defgroup PtlRPC Portal RPC and networking module.
+ *
+ * PortalRPC is the layer used by rest of lustre code to achieve network
+ * communications: establish connections with corresponding export and import
+ * states, listen for a service, send and receive RPCs.
+ * PortalRPC also includes base recovery framework: packet resending and
+ * replaying, reconnections, pinger.
+ *
+ * PortalRPC utilizes LNet as its transport layer.
+ *
+ * @{
+ */
+
#ifndef _LUSTRE_NET_H
#define _LUSTRE_NET_H
+/** \defgroup net net
+ *
+ * @{
+ */
+
#if defined(__linux__)
#include <linux/lustre_net.h>
#elif defined(__APPLE__)
#include <lu_object.h>
#include <lustre_req_layout.h>
+#include <obd_support.h>
+#include <lustre_ver.h>
+
/* MD flags we _always_ use */
#define PTLRPC_MD_OPTIONS 0
-/* Define maxima for bulk I/O
+/**
+ * Define maxima for bulk I/O
* CAVEAT EMPTOR, with multinet (i.e. routers forwarding between networks)
* these limits are system wide and not interface-local. */
#define PTLRPC_MAX_BRW_BITS LNET_MTU_BITS
# endif
#endif /* __KERNEL__ */
-/* Size over which to OBD_VMALLOC() rather than OBD_ALLOC() service request
- * buffers */
-#define SVC_BUF_VMALLOC_THRESHOLD (2 * CFS_PAGE_SIZE)
-
-/* The following constants determine how memory is used to buffer incoming
+/**
+ * The following constants determine how memory is used to buffer incoming
* service requests.
*
* ?_NBUFS # buffers to allocate when growing the pool
* Messages larger than ?_MAXREQSIZE are dropped. Request buffers are
* considered full when less than ?_MAXREQSIZE is left in them.
*/
-
-#define LDLM_THREADS_AUTO_MIN \
- min((int)(num_online_cpus() * num_online_cpus() * 2), 8)
-#define LDLM_THREADS_AUTO_MAX (LDLM_THREADS_AUTO_MIN * 16)
+#define LDLM_THREADS_AUTO_MIN (2)
+#define LDLM_THREADS_AUTO_MAX min_t(unsigned, cfs_num_online_cpus() * \
+ cfs_num_online_cpus() * 32, 128)
#define LDLM_BL_THREADS LDLM_THREADS_AUTO_MIN
-#define LDLM_NBUFS (64 * num_online_cpus())
+#define LDLM_NBUFS (64 * cfs_num_online_cpus())
#define LDLM_BUFSIZE (8 * 1024)
#define LDLM_MAXREQSIZE (5 * 1024)
#define LDLM_MAXREPSIZE (1024)
+/** Absolute limits */
#define MDT_MIN_THREADS 2UL
+#ifndef MDT_MAX_THREADS
#define MDT_MAX_THREADS 512UL
-#define MDT_NUM_THREADS max(min_t(unsigned long, MDT_MAX_THREADS, \
- num_physpages >> (25 - CFS_PAGE_SHIFT)), 2UL)
-#define FLD_NUM_THREADS max(min_t(unsigned long, MDT_MAX_THREADS, \
- num_physpages >> (25 - CFS_PAGE_SHIFT)), 2UL)
-#define SEQ_NUM_THREADS max(min_t(unsigned long, MDT_MAX_THREADS, \
- num_physpages >> (25 - CFS_PAGE_SHIFT)), 2UL)
-
-/* Absolute limits */
-#define MDS_THREADS_MIN 2
-#define MDS_THREADS_MAX 512
-#define MDS_THREADS_MIN_READPAGE 2
-#define MDS_NBUFS (64 * num_online_cpus())
-#define MDS_BUFSIZE (8 * 1024)
-/* Assume file name length = FNAME_MAX = 256 (true for ext3).
+#endif
+#define MDS_NBUFS (64 * cfs_num_online_cpus())
+/**
+ * Assume file name length = FNAME_MAX = 256 (true for ext3).
* path name length = PATH_MAX = 4096
- * LOV MD size max = EA_MAX = 4000
+ * LOV MD size max = EA_MAX = 48000 (2000 stripes)
* symlink: FNAME_MAX + PATH_MAX <- largest
* link: FNAME_MAX + PATH_MAX (mds_rec_link < mds_rec_create)
* rename: FNAME_MAX + FNAME_MAX
* open: FNAME_MAX + EA_MAX
*
* MDS_MAXREQSIZE ~= 4736 bytes =
- * lustre_msg + ldlm_request + mds_body + mds_rec_create + FNAME_MAX + PATH_MAX
+ * lustre_msg + ldlm_request + mdt_body + mds_rec_create + FNAME_MAX + PATH_MAX
* MDS_MAXREPSIZE ~= 8300 bytes = lustre_msg + llog_header
* or, for mds_close() and mds_reint_unlink() on a many-OST filesystem:
- * = 9210 bytes = lustre_msg + mds_body + 160 * (easize + cookiesize)
+ * = 9210 bytes = lustre_msg + mdt_body + 160 * (easize + cookiesize)
*
* Realistic size is about 512 bytes (20 character name + 128 char symlink),
* except in the open case where there are a large number of OSTs in a LOV.
*/
-#define MDS_MAXREQSIZE (5 * 1024)
-#define MDS_MAXREPSIZE max(9 * 1024, 280 + LOV_MAX_STRIPE_COUNT * 56)
+#define MDS_MAXREPSIZE max(10 * 1024, 362 + LOV_MAX_STRIPE_COUNT * 56)
+#define MDS_MAXREQSIZE MDS_MAXREPSIZE
+
+/** MDS_BUFSIZE = max_reqsize + max sptlrpc payload size */
+#define MDS_BUFSIZE (MDS_MAXREQSIZE + 1024)
-/* FLD_MAXREQSIZE == lustre_msg + __u32 padding + ptlrpc_body + opc + md_fld */
+/** FLD_MAXREQSIZE == lustre_msg + __u32 padding + ptlrpc_body + opc */
#define FLD_MAXREQSIZE (160)
-/* FLD_MAXREPSIZE == lustre_msg + ptlrpc_body + md_fld */
+/** FLD_MAXREPSIZE == lustre_msg + ptlrpc_body */
#define FLD_MAXREPSIZE (152)
-/* SEQ_MAXREQSIZE == lustre_msg + __u32 padding + ptlrpc_body + opc + lu_range +
+/**
+ * SEQ_MAXREQSIZE == lustre_msg + __u32 padding + ptlrpc_body + opc + lu_range +
* __u32 padding */
#define SEQ_MAXREQSIZE (160)
-/* SEQ_MAXREPSIZE == lustre_msg + ptlrpc_body + lu_range */
+/** SEQ_MAXREPSIZE == lustre_msg + ptlrpc_body + lu_range */
#define SEQ_MAXREPSIZE (152)
-#define MGS_THREADS_AUTO_MIN 2
+/** MGS threads must be >= 3, see bug 22458 comment #28 */
+#define MGS_THREADS_AUTO_MIN 3
#define MGS_THREADS_AUTO_MAX 32
-#define MGS_NBUFS (64 * num_online_cpus())
+#define MGS_NBUFS (64 * cfs_num_online_cpus())
#define MGS_BUFSIZE (8 * 1024)
#define MGS_MAXREQSIZE (7 * 1024)
#define MGS_MAXREPSIZE (9 * 1024)
-/* Absolute limits */
-#define OSS_THREADS_MIN 2
+/** Absolute OSS limits */
+#define OSS_THREADS_MIN 3 /* difficult replies, HPQ, others */
#define OSS_THREADS_MAX 512
-#define OST_NBUFS (64 * num_online_cpus())
+#define OST_NBUFS (64 * cfs_num_online_cpus())
#define OST_BUFSIZE (8 * 1024)
-/* OST_MAXREQSIZE ~= 4768 bytes =
+
+/**
+ * OST_MAXREQSIZE ~= 4768 bytes =
* lustre_msg + obdo + 16 * obd_ioobj + 256 * niobuf_remote
*
* - single object with 16 pages is 512 bytes
/* Macro to hide a typecast. */
#define ptlrpc_req_async_args(req) ((void *)&req->rq_async_args)
+/**
+ * Structure to single define portal connection.
+ */
struct ptlrpc_connection {
- struct hlist_node c_hash;
+ /** linkage for connections hash table */
+ cfs_hlist_node_t c_hash;
+ /** Our own lnet nid for this connection */
lnet_nid_t c_self;
+ /** Remote side nid for this connection */
lnet_process_id_t c_peer;
+ /** UUID of the other side */
struct obd_uuid c_remote_uuid;
- atomic_t c_refcount;
+ /** reference counter for this connection */
+ cfs_atomic_t c_refcount;
};
+/** Client definition for PortalRPC */
struct ptlrpc_client {
+ /** What lnet portal does this client send messages to by default */
__u32 cli_request_portal;
+ /** What portal do we expect replies on */
__u32 cli_reply_portal;
+ /** Name of the client */
char *cli_name;
};
-/* state flags of requests */
+/** state flags of requests */
/* XXX only ones left are those used by the bulk descs as well! */
#define PTL_RPC_FL_INTR (1 << 0) /* reply wait was interrupted by user */
#define PTL_RPC_FL_TIMEOUT (1 << 7) /* request timed out waiting for reply */
#define REQ_MAX_ACK_LOCKS 8
union ptlrpc_async_args {
- /* Scratchpad for passing args to completion interpreter. Users
- * cast to the struct of their choosing, and LASSERT that this is
+ /**
+ * Scratchpad for passing args to completion interpreter. Users
+ * cast to the struct of their choosing, and CLASSERT that this is
* big enough. For _tons_ of context, OBD_ALLOC a struct and store
* a pointer to it here. The pointer_arg ensures this struct is at
- * least big enough for that. */
- void *pointer_arg[9];
- __u64 space[4];
+ * least big enough for that.
+ */
+ void *pointer_arg[11];
+ __u64 space[6];
};
struct ptlrpc_request_set;
typedef int (*set_interpreter_func)(struct ptlrpc_request_set *, void *, int);
+/**
+ * Definition of request set structure.
+ * Request set is a list of requests (not necessary to the same target) that
+ * once populated with RPCs could be sent in parallel.
+ * There are two kinds of request sets. General purpose and with dedicated
+ * serving thread. Example of the latter is ptlrpcd set.
+ * For general purpose sets once request set started sending it is impossible
+ * to add new requests to such set.
+ * Provides a way to call "completion callbacks" when all requests in the set
+ * returned.
+ */
struct ptlrpc_request_set {
- int set_remaining; /* # uncompleted requests */
- cfs_waitq_t set_waitq;
- cfs_waitq_t *set_wakeup_ptr;
- struct list_head set_requests;
- struct list_head set_cblist; /* list of completion callbacks */
- set_interpreter_func set_interpret; /* completion callback */
- void *set_arg; /* completion context */
- /* locked so that any old caller can communicate requests to
- * the set holder who can then fold them into the lock-free set */
- spinlock_t set_new_req_lock;
- struct list_head set_new_requests;
+ cfs_atomic_t set_refcount;
+ /** number of in queue requests */
+ cfs_atomic_t set_new_count;
+ /** number of uncompleted requests */
+ cfs_atomic_t set_remaining;
+ /** wait queue to wait on for request events */
+ cfs_waitq_t set_waitq;
+ cfs_waitq_t *set_wakeup_ptr;
+ /** List of requests in the set */
+ cfs_list_t set_requests;
+ /**
+ * List of completion callbacks to be called when the set is completed
+ * This is only used if \a set_interpret is NULL.
+ * Links struct ptlrpc_set_cbdata.
+ */
+ cfs_list_t set_cblist;
+ /** Completion callback, if only one. */
+ set_interpreter_func set_interpret;
+ /** opaq argument passed to completion \a set_interpret callback. */
+ void *set_arg;
+ /**
+ * Lock for \a set_new_requests manipulations
+ * locked so that any old caller can communicate requests to
+ * the set holder who can then fold them into the lock-free set
+ */
+ cfs_spinlock_t set_new_req_lock;
+ /** List of new yet unsent requests. Only used with ptlrpcd now. */
+ cfs_list_t set_new_requests;
};
+/**
+ * Description of a single ptrlrpc_set callback
+ */
struct ptlrpc_set_cbdata {
- struct list_head psc_item;
+ /** List linkage item */
+ cfs_list_t psc_item;
+ /** Pointer to interpreting function */
set_interpreter_func psc_interpret;
+ /** Opaq argument to pass to the callback */
void *psc_data;
};
struct ptlrpc_bulk_desc;
-/*
+/**
* ptlrpc callback & work item stuff
*/
struct ptlrpc_cb_id {
void *cbid_arg; /* additional arg */
};
+/** Maximum number of locks to fit into reply state */
#define RS_MAX_LOCKS 8
-#define RS_DEBUG 1
-
+#define RS_DEBUG 0
+
+/**
+ * Structure to define reply state on the server
+ * Reply state holds various reply message information. Also for "difficult"
+ * replies (rep-ack case) we store the state after sending reply and wait
+ * for the client to acknowledge the reception. In these cases locks could be
+ * added to the state for replay/failover consistency guarantees.
+ */
struct ptlrpc_reply_state {
+ /** Callback description */
struct ptlrpc_cb_id rs_cb_id;
- struct list_head rs_list;
- struct list_head rs_exp_list;
- struct list_head rs_obd_list;
+ /** Linkage for list of all reply states in a system */
+ cfs_list_t rs_list;
+ /** Linkage for list of all reply states on same export */
+ cfs_list_t rs_exp_list;
+ /** Linkage for list of all reply states for same obd */
+ cfs_list_t rs_obd_list;
#if RS_DEBUG
- struct list_head rs_debug_list;
+ cfs_list_t rs_debug_list;
#endif
- /* updates to following flag serialised by srv_request_lock */
+ /** A spinlock to protect the reply state flags */
+ cfs_spinlock_t rs_lock;
+ /** Reply state flags */
unsigned long rs_difficult:1; /* ACK/commit stuff */
+ unsigned long rs_no_ack:1; /* no ACK, even for
+ difficult requests */
unsigned long rs_scheduled:1; /* being handled? */
unsigned long rs_scheduled_ever:1;/* any schedule attempts? */
unsigned long rs_handled:1; /* been handled yet? */
unsigned long rs_on_net:1; /* reply_out_callback pending? */
unsigned long rs_prealloc:1; /* rs from prealloc list */
-
+ unsigned long rs_committed:1;/* the transaction was committed
+ and the rs was dispatched
+ by ptlrpc_commit_replies */
+ /** Size of the state */
int rs_size;
+ /** opcode */
+ __u32 rs_opc;
+ /** Transaction number */
__u64 rs_transno;
+ /** xid */
__u64 rs_xid;
struct obd_export *rs_export;
struct ptlrpc_service *rs_service;
+ /** Lnet metadata handle for the reply */
lnet_handle_md_t rs_md_h;
- atomic_t rs_refcount;
+ cfs_atomic_t rs_refcount;
+ /** Context for the sevice thread */
struct ptlrpc_svc_ctx *rs_svc_ctx;
+ /** Reply buffer (actually sent to the client), encoded if needed */
struct lustre_msg *rs_repbuf; /* wrapper */
+ /** Size of the reply buffer */
int rs_repbuf_len; /* wrapper buf length */
+ /** Size of the reply message */
int rs_repdata_len; /* wrapper msg length */
+ /**
+ * Actual reply message. Its content is encrupted (if needed) to
+ * produce reply buffer for actual sending. In simple case
+ * of no network encryption we jus set \a rs_repbuf to \a rs_msg
+ */
struct lustre_msg *rs_msg; /* reply message */
- /* locks awaiting client reply ACK */
+ /** Number of locks awaiting client ACK */
int rs_nlocks;
+ /** Handles of locks awaiting client reply ACK */
struct lustre_handle rs_locks[RS_MAX_LOCKS];
+ /** Lock modes of locks in \a rs_locks */
ldlm_mode_t rs_modes[RS_MAX_LOCKS];
};
struct ptlrpc_thread;
+/** RPC stages */
enum rq_phase {
- RQ_PHASE_NEW = 0xebc0de00,
- RQ_PHASE_RPC = 0xebc0de01,
- RQ_PHASE_BULK = 0xebc0de02,
- RQ_PHASE_INTERPRET = 0xebc0de03,
- RQ_PHASE_COMPLETE = 0xebc0de04,
+ RQ_PHASE_NEW = 0xebc0de00,
+ RQ_PHASE_RPC = 0xebc0de01,
+ RQ_PHASE_BULK = 0xebc0de02,
+ RQ_PHASE_INTERPRET = 0xebc0de03,
+ RQ_PHASE_COMPLETE = 0xebc0de04,
+ RQ_PHASE_UNREGISTERING = 0xebc0de05,
+ RQ_PHASE_UNDEFINED = 0xebc0de06
};
+/** Type of request interpreter call-back */
+typedef int (*ptlrpc_interpterer_t)(const struct lu_env *env,
+ struct ptlrpc_request *req,
+ void *arg, int rc);
+
+/**
+ * Definition of request pool structure.
+ * The pool is used to store empty preallocated requests for the case
+ * when we would actually need to send something without performing
+ * any allocations (to avoid e.g. OOM).
+ */
struct ptlrpc_request_pool {
- spinlock_t prp_lock;
- struct list_head prp_req_list; /* list of ptlrpc_request structs */
+ /** Locks the list */
+ cfs_spinlock_t prp_lock;
+ /** list of ptlrpc_request structs */
+ cfs_list_t prp_req_list;
+ /** Maximum message size that would fit into a rquest from this pool */
int prp_rq_size;
+ /** Function to allocate more requests for this pool */
void (*prp_populate)(struct ptlrpc_request_pool *, int);
};
struct lu_context;
struct lu_env;
+struct ldlm_lock;
+
+/**
+ * Basic request prioritization operations structure.
+ * The whole idea is centered around locks and RPCs that might affect locks.
+ * When a lock is contended we try to give priority to RPCs that might lead
+ * to fastest release of that lock.
+ * Currently only implemented for OSTs only in a way that makes all
+ * IO and truncate RPCs that are coming from a locked region where a lock is
+ * contended a priority over other requests.
+ */
+struct ptlrpc_hpreq_ops {
+ /**
+ * Check if the lock handle of the given lock is the same as
+ * taken from the request.
+ */
+ int (*hpreq_lock_match)(struct ptlrpc_request *, struct ldlm_lock *);
+ /**
+ * Check if the request is a high priority one.
+ */
+ int (*hpreq_check)(struct ptlrpc_request *);
+};
+
+/**
+ * Represents remote procedure call.
+ *
+ * This is a staple structure used by everybody wanting to send a request
+ * in Lustre.
+ */
struct ptlrpc_request {
- int rq_type; /* one of PTL_RPC_MSG_* */
- struct list_head rq_list;
- struct list_head rq_timed_list; /* server-side early replies */
- struct list_head rq_history_list; /* server-side history */
- __u64 rq_history_seq; /* history sequence # */
+ /* Request type: one of PTL_RPC_MSG_* */
+ int rq_type;
+ /**
+ * Linkage item through which this request is included into
+ * sending/delayed lists on client and into rqbd list on server
+ */
+ cfs_list_t rq_list;
+ /**
+ * Server side list of incoming unserved requests sorted by arrival
+ * time. Traversed from time to time to notice about to expire
+ * requests and sent back "early replies" to clients to let them
+ * know server is alive and well, just very busy to service their
+ * requests in time
+ */
+ cfs_list_t rq_timed_list;
+ /** server-side history, used for debuging purposes. */
+ cfs_list_t rq_history_list;
+ /** server-side per-export list */
+ cfs_list_t rq_exp_list;
+ /** server-side hp handlers */
+ struct ptlrpc_hpreq_ops *rq_ops;
+ /** history sequence # */
+ __u64 rq_history_seq;
+ /** the index of service's srv_at_array into which request is linked */
+ time_t rq_at_index;
+ /** Result of request processing */
int rq_status;
- spinlock_t rq_lock;
- /* client-side flags are serialized by rq_lock */
+ /** Lock to protect request flags and some other important bits, like
+ * rq_list
+ */
+ cfs_spinlock_t rq_lock;
+ /** client-side flags are serialized by rq_lock */
unsigned long rq_intr:1, rq_replied:1, rq_err:1,
rq_timedout:1, rq_resend:1, rq_restart:1,
- /*
+ /**
* when ->rq_replay is set, request is kept by the client even
* after server commits corresponding transaction. This is
* used for operations that require sequence of multiple
* requests to be replayed. The only example currently is file
- * open/close/dw/setattr. When last request in such a sequence
- * is committed, ->rq_replay is cleared on all requests in the
+ * open/close. When last request in such a sequence is
+ * committed, ->rq_replay is cleared on all requests in the
* sequence.
*/
rq_replay:1,
- /* this is the last request in the sequence. */
- rq_sequence:1,
rq_no_resend:1, rq_waiting:1, rq_receiving_reply:1,
rq_no_delay:1, rq_net_err:1, rq_wait_ctx:1,
rq_early:1, rq_must_unlink:1,
+ rq_fake:1, /* this fake req */
+ rq_memalloc:1, /* req originated from "kswapd" */
/* server-side flags */
rq_packed_final:1, /* packed final reply */
- rq_sent_final:1; /* stop sending early replies */
+ rq_hp:1, /* high priority RPC */
+ rq_at_linked:1, /* link into service's srv_at_array */
+ rq_reply_truncate:1,
+ rq_committed:1,
+ /* whether the "rq_set" is a valid one */
+ rq_invalid_rqset:1;
enum rq_phase rq_phase; /* one of RQ_PHASE_* */
- atomic_t rq_refcount; /* client-side refcount for SENT race,
- server-side refcounf for multiple replies */
+ enum rq_phase rq_next_phase; /* one of RQ_PHASE_* to be used next */
+ cfs_atomic_t rq_refcount;/* client-side refcount for SENT race,
+ server-side refcounf for multiple replies */
- struct ptlrpc_thread *rq_svc_thread; /* initial thread servicing req */
+ /** initial thread servicing this request */
+ struct ptlrpc_thread *rq_svc_thread;
+ /** Portal to which this request would be sent */
int rq_request_portal; /* XXX FIXME bug 249 */
+ /** Portal where to wait for reply and where reply would be sent */
int rq_reply_portal; /* XXX FIXME bug 249 */
- int rq_nob_received; /* client-side # reply bytes actually received */
-
+ /**
+ * client-side:
+ * !rq_truncate : # reply bytes actually received,
+ * rq_truncate : required repbuf_len for resend
+ */
+ int rq_nob_received;
+ /** Request length */
int rq_reqlen;
+ /** Request message - what client sent */
struct lustre_msg *rq_reqmsg;
+ /** Reply length */
int rq_replen;
+ /** Reply message - server response */
struct lustre_msg *rq_repmsg;
+ /** Transaction number */
__u64 rq_transno;
+ /** xid */
__u64 rq_xid;
- struct list_head rq_replay_list;
- struct list_head rq_mod_list;
+ /**
+ * List item to for replay list. Not yet commited requests get linked
+ * there.
+ * Also see \a rq_replay comment above.
+ */
+ cfs_list_t rq_replay_list;
- struct ptlrpc_cli_ctx *rq_cli_ctx; /* client's half ctx */
- struct ptlrpc_svc_ctx *rq_svc_ctx; /* server's half ctx */
- struct list_head rq_ctx_chain; /* link to waited ctx */
+ /**
+ * security and encryption data
+ * @{ */
+ struct ptlrpc_cli_ctx *rq_cli_ctx; /**< client's half ctx */
+ struct ptlrpc_svc_ctx *rq_svc_ctx; /**< server's half ctx */
+ cfs_list_t rq_ctx_chain; /**< link to waited ctx */
- struct sptlrpc_flavor rq_flvr; /* client & server */
+ struct sptlrpc_flavor rq_flvr; /**< for client & server */
enum lustre_sec_part rq_sp_from;
unsigned long /* client/server security flags */
rq_auth_remote:1, /* authed as remote user */
rq_auth_usr_root:1, /* authed as root */
rq_auth_usr_mdt:1, /* authed as mdt */
+ rq_auth_usr_ost:1, /* authed as ost */
/* security tfm flags */
rq_pack_udesc:1,
rq_pack_bulk:1,
/* doesn't expect reply FIXME */
- rq_no_reply:1;
+ rq_no_reply:1,
+ rq_pill_init:1; /* pill initialized */
uid_t rq_auth_uid; /* authed uid */
uid_t rq_auth_mapped_uid; /* authed uid mapped to */
/* (server side), pointed directly into req buffer */
struct ptlrpc_user_desc *rq_user_desc;
- /* early replies go to offset 0, regular replies go after that */
+ /** early replies go to offset 0, regular replies go after that */
unsigned int rq_reply_off;
/* various buffer pointers */
int rq_clrbuf_len; /* only in priv mode */
int rq_clrdata_len; /* only in priv mode */
+ /** @} */
+
+ /** Fields that help to see if request and reply were swabbed or not */
__u32 rq_req_swab_mask;
__u32 rq_rep_swab_mask;
+ /** What was import generation when this request was sent */
int rq_import_generation;
enum lustre_imp_state rq_send_state;
- int rq_early_count; /* how many early replies (for stats) */
+ /** how many early replies (for stats) */
+ int rq_early_count;
- /* client+server request */
+ /** client+server request */
lnet_handle_md_t rq_req_md_h;
struct ptlrpc_cb_id rq_req_cbid;
+ /** optional time limit for send attempts */
+ cfs_duration_t rq_delay_limit;
+ /** time request was first queued */
+ cfs_time_t rq_queued_time;
/* server-side... */
- struct timeval rq_arrival_time; /* request arrival time */
- struct ptlrpc_reply_state *rq_reply_state; /* separated reply state */
- struct ptlrpc_request_buffer_desc *rq_rqbd; /* incoming request buffer*/
+ /** request arrival time */
+ struct timeval rq_arrival_time;
+ /** separated reply state */
+ struct ptlrpc_reply_state *rq_reply_state;
+ /** incoming request buffer */
+ struct ptlrpc_request_buffer_desc *rq_rqbd;
#ifdef CRAY_XT3
__u32 rq_uid; /* peer uid, used in MDS only */
#endif
- /* client-only incoming reply */
+ /** client-only incoming reply */
lnet_handle_md_t rq_reply_md_h;
cfs_waitq_t rq_reply_waitq;
struct ptlrpc_cb_id rq_reply_cbid;
+ /** our LNet NID */
lnet_nid_t rq_self;
+ /** Peer description (the other side) */
lnet_process_id_t rq_peer;
+ /** Server-side, export on which request was received */
struct obd_export *rq_export;
+ /** Client side, import where request is being sent */
struct obd_import *rq_import;
+ /** Replay callback, called after request is replayed at recovery */
void (*rq_replay_cb)(struct ptlrpc_request *);
+ /**
+ * Commit callback, called when request is committed and about to be
+ * freed.
+ */
void (*rq_commit_cb)(struct ptlrpc_request *);
+ /** Opaq data for replay and commit callbacks. */
void *rq_cb_data;
- struct ptlrpc_bulk_desc *rq_bulk;/* client side bulk */
+ /** For bulk requests on client only: bulk descriptor */
+ struct ptlrpc_bulk_desc *rq_bulk;
- /* client outgoing req */
- time_t rq_sent; /* when request/reply sent (secs), or
- * time when request should be sent */
+ /** client outgoing req */
+ /**
+ * when request/reply sent (secs), or time when request should be sent
+ */
+ time_t rq_sent;
+ /** time for request really sent out */
+ time_t rq_real_sent;
+
+ /** when request must finish. volatile
+ * so that servers' early reply updates to the deadline aren't
+ * kept in per-cpu cache */
+ volatile time_t rq_deadline;
+ /** when req reply unlink must finish. */
+ time_t rq_reply_deadline;
+ /** when req bulk unlink must finish. */
+ time_t rq_bulk_deadline;
+ /**
+ * service time estimate (secs)
+ * If the requestsis not served by this time, it is marked as timed out.
+ */
+ int rq_timeout;
+
+ /** Multi-rpc bits */
+ /** Link item for request set lists */
+ cfs_list_t rq_set_chain;
+ /** Per-request waitq introduced by bug 21938 for recovery waiting */
+ cfs_waitq_t rq_set_waitq;
+ /** Link back to the request set */
+ struct ptlrpc_request_set *rq_set;
+ /** Async completion handler, called when reply is received */
+ ptlrpc_interpterer_t rq_interpret_reply;
+ /** Async completion context */
+ union ptlrpc_async_args rq_async_args;
- volatile time_t rq_deadline; /* when request must finish. volatile
- so that servers' early reply updates to the deadline aren't
- kept in per-cpu cache */
- int rq_timeout; /* service time estimate (secs) */
+ /** Pool if request is from preallocated list */
+ struct ptlrpc_request_pool *rq_pool;
- /* Multi-rpc bits */
- struct list_head rq_set_chain;
- struct ptlrpc_request_set *rq_set;
- void *rq_interpret_reply; /* Async completion handler */
- union ptlrpc_async_args rq_async_args; /* Async completion context */
- struct ptlrpc_request_pool *rq_pool; /* Pool if request from
- preallocated list */
struct lu_context rq_session;
+ struct lu_context rq_recov_session;
- /* request format */
+ /** request format description */
struct req_capsule rq_pill;
};
-static inline void ptlrpc_close_replay_seq(struct ptlrpc_request *req)
+/**
+ * Call completion handler for rpc if any, return it's status or original
+ * rc if there was no handler defined for this request.
+ */
+static inline int ptlrpc_req_interpret(const struct lu_env *env,
+ struct ptlrpc_request *req, int rc)
{
- spin_lock(&req->rq_lock);
- req->rq_replay = 0;
- req->rq_sequence = 1;
- spin_unlock(&req->rq_lock);
+ if (req->rq_interpret_reply != NULL) {
+ req->rq_status = req->rq_interpret_reply(env, req,
+ &req->rq_async_args,
+ rc);
+ return req->rq_status;
+ }
+ return rc;
}
-static inline void lustre_set_req_swabbed(struct ptlrpc_request *req, int index)
+/**
+ * Returns 1 if request buffer at offset \a index was already swabbed
+ */
+static inline int lustre_req_swabbed(struct ptlrpc_request *req, int index)
{
LASSERT(index < sizeof(req->rq_req_swab_mask) * 8);
- LASSERT((req->rq_req_swab_mask & (1 << index)) == 0);
- req->rq_req_swab_mask |= 1 << index;
+ return req->rq_req_swab_mask & (1 << index);
}
-static inline void lustre_set_rep_swabbed(struct ptlrpc_request *req, int index)
+/**
+ * Returns 1 if request reply buffer at offset \a index was already swabbed
+ */
+static inline int lustre_rep_swabbed(struct ptlrpc_request *req, int index)
{
LASSERT(index < sizeof(req->rq_rep_swab_mask) * 8);
- LASSERT((req->rq_rep_swab_mask & (1 << index)) == 0);
- req->rq_rep_swab_mask |= 1 << index;
+ return req->rq_rep_swab_mask & (1 << index);
}
-static inline int lustre_req_swabbed(struct ptlrpc_request *req, int index)
+/**
+ * Returns 1 if request needs to be swabbed into local cpu byteorder
+ */
+static inline int ptlrpc_req_need_swab(struct ptlrpc_request *req)
+{
+ return lustre_req_swabbed(req, MSG_PTLRPC_HEADER_OFF);
+}
+
+/**
+ * Returns 1 if request reply needs to be swabbed into local cpu byteorder
+ */
+static inline int ptlrpc_rep_need_swab(struct ptlrpc_request *req)
+{
+ return lustre_rep_swabbed(req, MSG_PTLRPC_HEADER_OFF);
+}
+
+/**
+ * Mark request buffer at offset \a index that it was already swabbed
+ */
+static inline void lustre_set_req_swabbed(struct ptlrpc_request *req, int index)
{
LASSERT(index < sizeof(req->rq_req_swab_mask) * 8);
- return req->rq_req_swab_mask & (1 << index);
+ LASSERT((req->rq_req_swab_mask & (1 << index)) == 0);
+ req->rq_req_swab_mask |= 1 << index;
}
-static inline int lustre_rep_swabbed(struct ptlrpc_request *req, int index)
+/**
+ * Mark request reply buffer at offset \a index that it was already swabbed
+ */
+static inline void lustre_set_rep_swabbed(struct ptlrpc_request *req, int index)
{
LASSERT(index < sizeof(req->rq_rep_swab_mask) * 8);
- return req->rq_rep_swab_mask & (1 << index);
+ LASSERT((req->rq_rep_swab_mask & (1 << index)) == 0);
+ req->rq_rep_swab_mask |= 1 << index;
}
+/**
+ * Convert numerical request phase value \a phase into text string description
+ */
static inline const char *
-ptlrpc_rqphase2str(const struct ptlrpc_request *req)
+ptlrpc_phase2str(enum rq_phase phase)
{
- switch (req->rq_phase) {
+ switch (phase) {
case RQ_PHASE_NEW:
return "New";
case RQ_PHASE_RPC:
return "Interpret";
case RQ_PHASE_COMPLETE:
return "Complete";
+ case RQ_PHASE_UNREGISTERING:
+ return "Unregistering";
default:
return "?Phase?";
}
}
+/**
+ * Convert numerical request phase of the request \a req into text stringi
+ * description
+ */
+static inline const char *
+ptlrpc_rqphase2str(struct ptlrpc_request *req)
+{
+ return ptlrpc_phase2str(req->rq_phase);
+}
+
+/**
+ * Debugging functions and helpers to print request structure into debug log
+ * @{
+ */
/* Spare the preprocessor, spoil the bugs. */
#define FLAG(field, str) (field ? str : "")
+/** Convert bit flags into a string */
#define DEBUG_REQ_FLAGS(req) \
ptlrpc_rqphase2str(req), \
FLAG(req->rq_intr, "I"), FLAG(req->rq_replied, "R"), \
FLAG(req->rq_restart, "T"), FLAG(req->rq_replay, "P"), \
FLAG(req->rq_no_resend, "N"), \
FLAG(req->rq_waiting, "W"), \
- FLAG(req->rq_wait_ctx, "C")
+ FLAG(req->rq_wait_ctx, "C"), FLAG(req->rq_hp, "H"), \
+ FLAG(req->rq_committed, "M")
-#define REQ_FLAGS_FMT "%s:%s%s%s%s%s%s%s%s%s%s"
+#define REQ_FLAGS_FMT "%s:%s%s%s%s%s%s%s%s%s%s%s%s"
void _debug_req(struct ptlrpc_request *req, __u32 mask,
struct libcfs_debug_msg_data *data, const char *fmt, ...)
__attribute__ ((format (printf, 4, 5)));
+/**
+ * Helper that decides if we need to print request accordig to current debug
+ * level settings
+ */
#define debug_req(cdls, level, req, file, func, line, fmt, a...) \
do { \
- CHECK_STACK(); \
+ CFS_CHECK_STACK(); \
\
if (((level) & D_CANTMASK) != 0 || \
((libcfs_debug & (level)) != 0 && \
} \
} while(0)
-/* for most callers (level is a constant) this is resolved at compile time */
+/**
+ * This is the debug print function you need to use to print request sturucture
+ * content into lustre debug log.
+ * for most callers (level is a constant) this is resolved at compile time */
#define DEBUG_REQ(level, req, fmt, args...) \
do { \
if ((level) & (D_ERROR | D_WARNING)) { \
debug_req(NULL, level, req, __FILE__, __func__, __LINE__, \
"@@@ "fmt" ", ## args); \
} while (0)
+/** @} */
+/**
+ * Structure that defines a single page of a bulk transfer
+ */
struct ptlrpc_bulk_page {
- struct list_head bp_link;
+ /** Linkage to list of pages in a bulk */
+ cfs_list_t bp_link;
+ /**
+ * Number of bytes in a page to transfer starting from \a bp_pageoffset
+ */
int bp_buflen;
- int bp_pageoffset; /* offset within a page */
+ /** offset within a page */
+ int bp_pageoffset;
+ /** The page itself */
struct page *bp_page;
};
#define BULK_GET_SINK 2
#define BULK_PUT_SOURCE 3
+/**
+ * Definition of buk descriptor.
+ * Bulks are special "Two phase" RPCs where initial request message
+ * is sent first and it is followed bt a transfer (o receiving) of a large
+ * amount of data to be settled into pages referenced from the bulk descriptors.
+ * Bulks transfers (the actual data following the small requests) are done
+ * on separate LNet portals.
+ * In lustre we use bulk transfers for READ and WRITE transfers from/to OSTs.
+ * Another user is readpage for MDT.
+ */
struct ptlrpc_bulk_desc {
- unsigned long bd_success:1; /* completed successfully */
- unsigned long bd_network_rw:1; /* accessible to the network */
- unsigned long bd_type:2; /* {put,get}{source,sink} */
- unsigned long bd_registered:1; /* client side */
- spinlock_t bd_lock; /* serialise with callback */
+ /** completed successfully */
+ unsigned long bd_success:1;
+ /** accessible to the network (network io potentially in progress) */
+ unsigned long bd_network_rw:1;
+ /** {put,get}{source,sink} */
+ unsigned long bd_type:2;
+ /** client side */
+ unsigned long bd_registered:1;
+ /** For serialization with callback */
+ cfs_spinlock_t bd_lock;
+ /** Import generation when request for this bulk was sent */
int bd_import_generation;
+ /** Server side - export this bulk created for */
struct obd_export *bd_export;
+ /** Client side - import this bulk was sent on */
struct obd_import *bd_import;
+ /** LNet portal for this bulk */
__u32 bd_portal;
- struct ptlrpc_request *bd_req; /* associated request */
+ /** Back pointer to the request */
+ struct ptlrpc_request *bd_req;
cfs_waitq_t bd_waitq; /* server side only WQ */
int bd_iov_count; /* # entries in bd_iov */
int bd_max_iov; /* allocated size of bd_iov */
lnet_handle_md_t bd_md_h; /* associated MD */
lnet_nid_t bd_sender; /* stash event::sender */
- cfs_page_t **bd_enc_pages;
#if defined(__KERNEL__)
+ /*
+ * encrypt iov, size is either 0 or bd_iov_count.
+ */
+ lnet_kiov_t *bd_enc_iov;
+
lnet_kiov_t bd_iov[0];
#else
lnet_md_iovec_t bd_iov[0];
#endif
};
-struct ptlrpc_thread {
-
- struct list_head t_link; /* active threads in svc->srv_threads */
+enum {
+ SVC_STOPPED = 1 << 0,
+ SVC_STOPPING = 1 << 1,
+ SVC_STARTING = 1 << 2,
+ SVC_RUNNING = 1 << 3,
+ SVC_EVENT = 1 << 4,
+ SVC_SIGNAL = 1 << 5,
+};
- void *t_data; /* thread-private data (preallocated memory) */
+/**
+ * Definition of server service thread structure
+ */
+struct ptlrpc_thread {
+ /**
+ * List of active threads in svc->srv_threads
+ */
+ cfs_list_t t_link;
+ /**
+ * thread-private data (preallocated memory)
+ */
+ void *t_data;
__u32 t_flags;
-
- unsigned int t_id; /* service thread index, from ptlrpc_start_threads */
+ /**
+ * service thread index, from ptlrpc_start_threads
+ */
+ unsigned int t_id;
+ /**
+ * service thread pid
+ */
+ pid_t t_pid;
+ /**
+ * put watchdog in the structure per thread b=14840
+ */
+ struct lc_watchdog *t_watchdog;
+ /**
+ * the svc this thread belonged to b=18582
+ */
+ struct ptlrpc_service *t_svc;
cfs_waitq_t t_ctl_waitq;
struct lu_env *t_env;
};
+static inline int thread_is_stopped(struct ptlrpc_thread *thread)
+{
+ return !!(thread->t_flags & SVC_STOPPED);
+}
+
+static inline int thread_is_stopping(struct ptlrpc_thread *thread)
+{
+ return !!(thread->t_flags & SVC_STOPPING);
+}
+
+static inline int thread_is_starting(struct ptlrpc_thread *thread)
+{
+ return !!(thread->t_flags & SVC_STARTING);
+}
+
+static inline int thread_is_running(struct ptlrpc_thread *thread)
+{
+ return !!(thread->t_flags & SVC_RUNNING);
+}
+
+static inline int thread_is_event(struct ptlrpc_thread *thread)
+{
+ return !!(thread->t_flags & SVC_EVENT);
+}
+
+static inline int thread_is_signal(struct ptlrpc_thread *thread)
+{
+ return !!(thread->t_flags & SVC_SIGNAL);
+}
+
+static inline void thread_clear_flags(struct ptlrpc_thread *thread, __u32 flags)
+{
+ thread->t_flags &= ~flags;
+}
+
+static inline void thread_set_flags(struct ptlrpc_thread *thread, __u32 flags)
+{
+ thread->t_flags = flags;
+}
+
+static inline void thread_add_flags(struct ptlrpc_thread *thread, __u32 flags)
+{
+ thread->t_flags |= flags;
+}
+
+static inline int thread_test_and_clear_flags(struct ptlrpc_thread *thread,
+ __u32 flags)
+{
+ if (thread->t_flags & flags) {
+ thread->t_flags &= ~flags;
+ return 1;
+ }
+ return 0;
+}
+
+/**
+ * Request buffer descriptor structure.
+ * This is a structure that contains one posted request buffer for service.
+ * Once data land into a buffer, event callback creates actual request and
+ * notifies wakes one of the service threads to process new incoming request.
+ * More than one request can fit into the buffer.
+ */
struct ptlrpc_request_buffer_desc {
- struct list_head rqbd_list;
- struct list_head rqbd_reqs;
+ /** Link item for rqbds on a service */
+ cfs_list_t rqbd_list;
+ /** History of requests for this buffer */
+ cfs_list_t rqbd_reqs;
+ /** Back pointer to service for which this buffer is registered */
struct ptlrpc_service *rqbd_service;
+ /** LNet descriptor */
lnet_handle_md_t rqbd_md_h;
int rqbd_refcount;
+ /** The buffer itself */
char *rqbd_buffer;
struct ptlrpc_cb_id rqbd_cbid;
+ /**
+ * This "embedded" request structure is only used for the
+ * last request to fit into the buffer
+ */
struct ptlrpc_request rqbd_req;
};
-typedef int (*svc_handler_t)(struct ptlrpc_request *req);
-typedef void (*svcreq_printfn_t)(void *, struct ptlrpc_request *);
+typedef int (*svc_thr_init_t)(struct ptlrpc_thread *thread);
+typedef void (*svc_thr_done_t)(struct ptlrpc_thread *thread);
+typedef int (*svc_handler_t)(struct ptlrpc_request *req);
+typedef int (*svc_hpreq_handler_t)(struct ptlrpc_request *);
+typedef void (*svc_req_printfn_t)(void *, struct ptlrpc_request *);
-struct ptlrpc_service {
- struct list_head srv_list; /* chain thru all services */
- int srv_max_req_size; /* biggest request to receive */
- int srv_max_reply_size; /* biggest reply to send */
- int srv_buf_size; /* size of individual buffers */
- int srv_nbuf_per_group; /* # buffers to allocate in 1 group */
- int srv_nbufs; /* total # req buffer descs allocated */
- int srv_threads_min; /* threads to start at SOW */
- int srv_threads_max; /* thread upper limit */
- int srv_threads_started; /* index of last started thread */
- int srv_threads_running; /* # running threads */
- int srv_n_difficult_replies; /* # 'difficult' replies */
- int srv_n_active_reqs; /* # reqs being served */
- cfs_duration_t srv_rqbd_timeout; /* timeout before re-posting reqs, in tick */
- int srv_watchdog_factor; /* soft watchdog timeout mutiplier */
- unsigned srv_cpu_affinity:1; /* bind threads to CPUs */
- unsigned srv_at_check:1; /* check early replies */
- cfs_time_t srv_at_checktime; /* debug */
-
- __u32 srv_req_portal;
- __u32 srv_rep_portal;
-
- /* AT stuff */
- struct adaptive_timeout srv_at_estimate;/* estimated rpc service time */
- spinlock_t srv_at_lock;
- struct list_head srv_at_list; /* reqs waiting for replies */
- cfs_timer_t srv_at_timer; /* early reply timer */
-
- int srv_n_queued_reqs; /* # reqs in either of the queues below */
- struct list_head srv_req_in_queue; /* incoming reqs */
- struct list_head srv_request_queue; /* reqs waiting for service */
-
- struct list_head srv_request_history; /* request history */
- __u64 srv_request_seq; /* next request sequence # */
- __u64 srv_request_max_cull_seq; /* highest seq culled from history */
- svcreq_printfn_t srv_request_history_print_fn; /* service-specific print fn */
-
- struct list_head srv_idle_rqbds; /* request buffers to be reposted */
- struct list_head srv_active_rqbds; /* req buffers receiving */
- struct list_head srv_history_rqbds; /* request buffer history */
- int srv_nrqbd_receiving; /* # posted request buffers */
- int srv_n_history_rqbds; /* # request buffers in history */
- int srv_max_history_rqbds;/* max # request buffers in history */
-
- atomic_t srv_outstanding_replies;
- struct list_head srv_active_replies; /* all the active replies */
- struct list_head srv_reply_queue; /* replies waiting for service */
-
- cfs_waitq_t srv_waitq; /* all threads sleep on this. This
- * wait-queue is signalled when new
- * incoming request arrives and when
- * difficult reply has to be handled. */
-
- struct list_head srv_threads; /* service thread list */
- svc_handler_t srv_handler;
-
- char *srv_name; /* only statically allocated strings here; we don't clean them */
- char *srv_thread_name; /* only statically allocated strings here; we don't clean them */
-
- spinlock_t srv_lock;
-
- cfs_proc_dir_entry_t *srv_procroot;
- struct lprocfs_stats *srv_stats;
-
- /* List of free reply_states */
- struct list_head srv_free_rs_list;
- /* waitq to run, when adding stuff to srv_free_rs_list */
- cfs_waitq_t srv_free_rs_waitq;
+#ifndef __cfs_cacheline_aligned
+/* NB: put it here for reducing patche dependence */
+# define __cfs_cacheline_aligned
+#endif
- /*
- * Tags for lu_context associated with this thread, see struct
- * lu_context.
- */
- __u32 srv_ctx_tags;
- /*
+/**
+ * How many high priority requests to serve before serving one normal
+ * priority request
+ */
+#define PTLRPC_SVC_HP_RATIO 10
+
+/**
+ * Definition of PortalRPC service.
+ * The service is listening on a particular portal (like tcp port)
+ * and perform actions for a specific server like IO service for OST
+ * or general metadata service for MDS.
+ *
+ * ptlrpc service has four locks:
+ * \a srv_lock
+ * serialize operations on rqbd and requests waiting for preprocess
+ * \a srv_rq_lock
+ * serialize operations active requests sent to this portal
+ * \a srv_at_lock
+ * serialize adaptive timeout stuff
+ * \a srv_rs_lock
+ * serialize operations on RS list (reply states)
+ *
+ * We don't have any use-case to take two or more locks at the same time
+ * for now, so there is no lock order issue.
+ */
+struct ptlrpc_service {
+ /** most often accessed fields */
+ /** chain thru all services */
+ cfs_list_t srv_list;
+ /** only statically allocated strings here; we don't clean them */
+ char *srv_name;
+ /** only statically allocated strings here; we don't clean them */
+ char *srv_thread_name;
+ /** service thread list */
+ cfs_list_t srv_threads;
+ /** threads to start at beginning of service */
+ int srv_threads_min;
+ /** thread upper limit */
+ int srv_threads_max;
+ /** always increasing number */
+ unsigned srv_threads_next_id;
+ /** # of starting threads */
+ int srv_threads_starting;
+ /** # running threads */
+ int srv_threads_running;
+
+ /** service operations, move to ptlrpc_svc_ops_t in the future */
+ /** @{ */
+ /**
* if non-NULL called during thread creation (ptlrpc_start_thread())
* to initialize service specific per-thread state.
*/
- int (*srv_init)(struct ptlrpc_thread *thread);
- /*
+ svc_thr_init_t srv_init;
+ /**
* if non-NULL called during thread shutdown (ptlrpc_main()) to
* destruct state created by ->srv_init().
*/
- void (*srv_done)(struct ptlrpc_thread *thread);
+ svc_thr_done_t srv_done;
+ /** Handler function for incoming requests for this service */
+ svc_handler_t srv_handler;
+ /** hp request handler */
+ svc_hpreq_handler_t srv_hpreq_handler;
+ /** service-specific print fn */
+ svc_req_printfn_t srv_req_printfn;
+ /** @} */
+
+ /** Root of /proc dir tree for this service */
+ cfs_proc_dir_entry_t *srv_procroot;
+ /** Pointer to statistic data for this service */
+ struct lprocfs_stats *srv_stats;
+ /** # hp per lp reqs to handle */
+ int srv_hpreq_ratio;
+ /** biggest request to receive */
+ int srv_max_req_size;
+ /** biggest reply to send */
+ int srv_max_reply_size;
+ /** size of individual buffers */
+ int srv_buf_size;
+ /** # buffers to allocate in 1 group */
+ int srv_nbuf_per_group;
+ /** Local portal on which to receive requests */
+ __u32 srv_req_portal;
+ /** Portal on the client to send replies to */
+ __u32 srv_rep_portal;
+ /**
+ * Tags for lu_context associated with this thread, see struct
+ * lu_context.
+ */
+ __u32 srv_ctx_tags;
+ /** soft watchdog timeout multiplier */
+ int srv_watchdog_factor;
+ /** bind threads to CPUs */
+ unsigned srv_cpu_affinity:1;
+ /** under unregister_service */
+ unsigned srv_is_stopping:1;
+
+ /**
+ * serialize the following fields, used for protecting
+ * rqbd list and incoming requests waiting for preprocess
+ */
+ cfs_spinlock_t srv_lock __cfs_cacheline_aligned;
+ /** incoming reqs */
+ cfs_list_t srv_req_in_queue;
+ /** total # req buffer descs allocated */
+ int srv_nbufs;
+ /** # posted request buffers */
+ int srv_nrqbd_receiving;
+ /** timeout before re-posting reqs, in tick */
+ cfs_duration_t srv_rqbd_timeout;
+ /** request buffers to be reposted */
+ cfs_list_t srv_idle_rqbds;
+ /** req buffers receiving */
+ cfs_list_t srv_active_rqbds;
+ /** request buffer history */
+ cfs_list_t srv_history_rqbds;
+ /** # request buffers in history */
+ int srv_n_history_rqbds;
+ /** max # request buffers in history */
+ int srv_max_history_rqbds;
+ /** request history */
+ cfs_list_t srv_request_history;
+ /** next request sequence # */
+ __u64 srv_request_seq;
+ /** highest seq culled from history */
+ __u64 srv_request_max_cull_seq;
+ /**
+ * all threads sleep on this. This wait-queue is signalled when new
+ * incoming request arrives and when difficult reply has to be handled.
+ */
+ cfs_waitq_t srv_waitq;
+
+ /**
+ * serialize the following fields, used for processing requests
+ * sent to this portal
+ */
+ cfs_spinlock_t srv_rq_lock __cfs_cacheline_aligned;
+ /** # reqs in either of the queues below */
+ /** reqs waiting for service */
+ cfs_list_t srv_request_queue;
+ /** high priority queue */
+ cfs_list_t srv_request_hpq;
+ /** # incoming reqs */
+ int srv_n_queued_reqs;
+ /** # reqs being served */
+ int srv_n_active_reqs;
+ /** # HPreqs being served */
+ int srv_n_active_hpreq;
+ /** # hp requests handled */
+ int srv_hpreq_count;
+
+ /** AT stuff */
+ /** @{ */
+ /**
+ * serialize the following fields, used for changes on
+ * adaptive timeout
+ */
+ cfs_spinlock_t srv_at_lock __cfs_cacheline_aligned;
+ /** estimated rpc service time */
+ struct adaptive_timeout srv_at_estimate;
+ /** reqs waiting for replies */
+ struct ptlrpc_at_array srv_at_array;
+ /** early reply timer */
+ cfs_timer_t srv_at_timer;
+ /** check early replies */
+ unsigned srv_at_check;
+ /** debug */
+ cfs_time_t srv_at_checktime;
+ /** @} */
+ /**
+ * serialize the following fields, used for processing
+ * replies for this portal
+ */
+ cfs_spinlock_t srv_rs_lock __cfs_cacheline_aligned;
+ /** all the active replies */
+ cfs_list_t srv_active_replies;
+#ifndef __KERNEL__
+ /** replies waiting for service */
+ cfs_list_t srv_reply_queue;
+#endif
+ /** List of free reply_states */
+ cfs_list_t srv_free_rs_list;
+ /** waitq to run, when adding stuff to srv_free_rs_list */
+ cfs_waitq_t srv_free_rs_waitq;
+ /** # 'difficult' replies */
+ cfs_atomic_t srv_n_difficult_replies;
//struct ptlrpc_srv_ni srv_interfaces[0];
};
+/**
+ * Declaration of ptlrpcd control structure
+ */
struct ptlrpcd_ctl {
/**
- * Ptlrpc thread control flags (LIOD_START, LIOD_STOP, LIOD_STOP_FORCE)
+ * Ptlrpc thread control flags (LIOD_START, LIOD_STOP, LIOD_FORCE)
*/
unsigned long pc_flags;
/**
* Thread lock protecting structure fields.
*/
- spinlock_t pc_lock;
+ cfs_spinlock_t pc_lock;
/**
* Start completion.
*/
- struct completion pc_starting;
+ cfs_completion_t pc_starting;
/**
* Stop completion.
*/
- struct completion pc_finishing;
+ cfs_completion_t pc_finishing;
/**
* Thread requests set.
*/
* Thread name used in cfs_daemonize()
*/
char pc_name[16];
+ /**
+ * Environment for request interpreters to run in.
+ */
+ struct lu_env pc_env;
+ /**
+ * Index of ptlrpcd thread in the array.
+ */
+ int pc_index;
+ /**
+ * Number of the ptlrpcd's partners.
+ */
+ int pc_npartners;
+ /**
+ * Pointer to the array of partners' ptlrpcd_ctl structure.
+ */
+ struct ptlrpcd_ctl **pc_partners;
+ /**
+ * Record the partner index to be processed next.
+ */
+ int pc_cursor;
#ifndef __KERNEL__
/**
* Async rpcs flag to make sure that ptlrpcd_check() is called only
*/
LIOD_STOP = 1 << 1,
/**
- * Ptlrpc thread stop force flag. This will cause also
- * aborting any inflight rpcs handled by thread.
+ * Ptlrpc thread force flag (only stop force so far).
+ * This will cause aborting any inflight rpcs handled
+ * by thread if LIOD_STOP is specified.
+ */
+ LIOD_FORCE = 1 << 2,
+ /**
+ * This is a recovery ptlrpc thread.
*/
- LIOD_STOP_FORCE = 1 << 2
+ LIOD_RECOVERY = 1 << 3,
+ /**
+ * The ptlrpcd is bound to some CPU core.
+ */
+ LIOD_BIND = 1 << 4,
};
/* ptlrpc/events.c */
extern lnet_handle_eq_t ptlrpc_eq_h;
extern int ptlrpc_uuid_to_peer(struct obd_uuid *uuid,
lnet_process_id_t *peer, lnet_nid_t *self);
+/**
+ * These callbacks are invoked by LNet when something happened to
+ * underlying buffer
+ * @{
+ */
extern void request_out_callback (lnet_event_t *ev);
extern void reply_in_callback(lnet_event_t *ev);
extern void client_bulk_callback (lnet_event_t *ev);
extern void request_in_callback(lnet_event_t *ev);
extern void reply_out_callback(lnet_event_t *ev);
extern void server_bulk_callback (lnet_event_t *ev);
+/** @} */
/* ptlrpc/connection.c */
struct ptlrpc_connection *ptlrpc_connection_get(lnet_process_id_t peer,
extern lnet_pid_t ptl_get_pid(void);
/* ptlrpc/niobuf.c */
+/**
+ * Actual interfacing with LNet to put/get/register/unregister stuff
+ * @{
+ */
int ptlrpc_start_bulk_transfer(struct ptlrpc_bulk_desc *desc);
void ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *desc);
int ptlrpc_register_bulk(struct ptlrpc_request *req);
-void ptlrpc_unregister_bulk (struct ptlrpc_request *req);
+int ptlrpc_unregister_bulk(struct ptlrpc_request *req, int async);
-static inline int ptlrpc_bulk_active (struct ptlrpc_bulk_desc *desc)
+static inline int ptlrpc_server_bulk_active(struct ptlrpc_bulk_desc *desc)
{
- int rc;
+ int rc;
+
+ LASSERT(desc != NULL);
- spin_lock(&desc->bd_lock);
+ cfs_spin_lock(&desc->bd_lock);
rc = desc->bd_network_rw;
- spin_unlock(&desc->bd_lock);
- return (rc);
+ cfs_spin_unlock(&desc->bd_lock);
+ return rc;
+}
+
+static inline int ptlrpc_client_bulk_active(struct ptlrpc_request *req)
+{
+ struct ptlrpc_bulk_desc *desc = req->rq_bulk;
+ int rc;
+
+ LASSERT(req != NULL);
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK) &&
+ req->rq_bulk_deadline > cfs_time_current_sec())
+ return 1;
+
+ if (!desc)
+ return 0;
+
+ cfs_spin_lock(&desc->bd_lock);
+ rc = desc->bd_network_rw;
+ cfs_spin_unlock(&desc->bd_lock);
+ return rc;
}
#define PTLRPC_REPLY_MAYBE_DIFFICULT 0x01
int ptlrpc_at_get_net_latency(struct ptlrpc_request *req);
int ptl_send_rpc(struct ptlrpc_request *request, int noreply);
int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd);
+/** @} */
/* ptlrpc/client.c */
+/**
+ * Client-side portals API. Everything to send requests, receive replies,
+ * request queues, request management, etc.
+ * @{
+ */
void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
struct ptlrpc_client *);
void ptlrpc_cleanup_client(struct obd_import *imp);
struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid);
-static inline int
-ptlrpc_client_recv_or_unlink (struct ptlrpc_request *req)
-{
- int rc;
-
- spin_lock(&req->rq_lock);
- rc = req->rq_receiving_reply || req->rq_must_unlink;
- spin_unlock(&req->rq_lock);
- return (rc);
-}
-
-static inline void
-ptlrpc_wake_client_req (struct ptlrpc_request *req)
-{
- if (req->rq_set == NULL)
- cfs_waitq_signal(&req->rq_reply_waitq);
- else
- cfs_waitq_signal(&req->rq_set->set_waitq);
-}
-
int ptlrpc_queue_wait(struct ptlrpc_request *req);
int ptlrpc_replay_req(struct ptlrpc_request *req);
-void ptlrpc_unregister_reply(struct ptlrpc_request *req);
+int ptlrpc_unregister_reply(struct ptlrpc_request *req, int async);
void ptlrpc_restart_req(struct ptlrpc_request *req);
void ptlrpc_abort_inflight(struct obd_import *imp);
+void ptlrpc_cleanup_imp(struct obd_import *imp);
void ptlrpc_abort_set(struct ptlrpc_request_set *set);
struct ptlrpc_request_set *ptlrpc_prep_set(void);
int ptlrpc_set_add_cb(struct ptlrpc_request_set *set,
set_interpreter_func fn, void *data);
int ptlrpc_set_next_timeout(struct ptlrpc_request_set *);
-int ptlrpc_check_set(struct ptlrpc_request_set *set);
+int ptlrpc_check_set(const struct lu_env *env, struct ptlrpc_request_set *set);
int ptlrpc_set_wait(struct ptlrpc_request_set *);
int ptlrpc_expired_set(void *data);
void ptlrpc_interrupted_set(void *data);
void ptlrpc_mark_interrupted(struct ptlrpc_request *req);
void ptlrpc_set_destroy(struct ptlrpc_request_set *);
void ptlrpc_set_add_req(struct ptlrpc_request_set *, struct ptlrpc_request *);
-int ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
- struct ptlrpc_request *req);
+void ptlrpc_set_add_new_req(struct ptlrpcd_ctl *pc,
+ struct ptlrpc_request *req);
void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool);
void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq);
int ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
__u32 version, int opcode, char **bufs,
struct ptlrpc_cli_ctx *ctx);
+struct ptlrpc_request *ptlrpc_prep_fakereq(struct obd_import *imp,
+ unsigned int timeout,
+ ptlrpc_interpterer_t interpreter);
+void ptlrpc_fakereq_finished(struct ptlrpc_request *req);
+
struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, __u32 version,
int opcode, int count, __u32 *lengths,
char **bufs);
__u32 version, int opcode,
int count, __u32 *lengths, char **bufs,
struct ptlrpc_request_pool *pool);
-void ptlrpc_free_req(struct ptlrpc_request *request);
void ptlrpc_req_finished(struct ptlrpc_request *request);
void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request);
struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req);
__u64 ptlrpc_sample_next_xid(void);
__u64 ptlrpc_req_xid(struct ptlrpc_request *request);
+/** @} */
+
struct ptlrpc_service_conf {
int psc_nbufs;
int psc_bufsize;
};
/* ptlrpc/service.c */
+/**
+ * Server-side services API. Register/unregister service, request state
+ * management, service thread management
+ *
+ * @{
+ */
void ptlrpc_save_lock (struct ptlrpc_request *req,
- struct lustre_handle *lock, int mode);
-void ptlrpc_commit_replies (struct obd_device *obd);
+ struct lustre_handle *lock, int mode, int no_ack);
+void ptlrpc_commit_replies(struct obd_export *exp);
+void ptlrpc_dispatch_difficult_reply (struct ptlrpc_reply_state *rs);
void ptlrpc_schedule_difficult_reply (struct ptlrpc_reply_state *rs);
struct ptlrpc_service *ptlrpc_init_svc_conf(struct ptlrpc_service_conf *c,
svc_handler_t h, char *name,
struct proc_dir_entry *proc_entry,
- svcreq_printfn_t prntfn,
+ svc_req_printfn_t prntfn,
char *threadname);
struct ptlrpc_service *ptlrpc_init_svc(int nbufs, int bufsize, int max_req_size,
int watchdog_factor,
svc_handler_t, char *name,
cfs_proc_dir_entry_t *proc_entry,
- svcreq_printfn_t,
+ svc_req_printfn_t,
int min_threads, int max_threads,
- char *threadname, __u32 ctx_tags);
+ char *threadname, __u32 ctx_tags,
+ svc_hpreq_handler_t);
void ptlrpc_stop_all_threads(struct ptlrpc_service *svc);
-int ptlrpc_start_threads(struct obd_device *dev, struct ptlrpc_service *svc);
-int ptlrpc_start_thread(struct obd_device *dev, struct ptlrpc_service *svc);
+int ptlrpc_start_threads(struct ptlrpc_service *svc);
+int ptlrpc_start_thread(struct ptlrpc_service *svc);
int ptlrpc_unregister_service(struct ptlrpc_service *service);
int liblustre_check_services (void *arg);
void ptlrpc_daemonize(char *name);
int ptlrpc_service_health_check(struct ptlrpc_service *);
+void ptlrpc_hpreq_reorder(struct ptlrpc_request *req);
+void ptlrpc_server_drop_request(struct ptlrpc_request *req);
+#ifdef __KERNEL__
+int ptlrpc_hr_init(void);
+void ptlrpc_hr_fini(void);
+#else
+# define ptlrpc_hr_init() (0)
+# define ptlrpc_hr_fini() do {} while(0)
+#endif
struct ptlrpc_svc_data {
char *name;
struct ptlrpc_service *svc;
struct ptlrpc_thread *thread;
- struct obd_device *dev;
};
+/** @} */
/* ptlrpc/import.c */
-int ptlrpc_connect_import(struct obd_import *imp, char * new_uuid);
+/**
+ * Import API
+ * @{
+ */
+int ptlrpc_connect_import(struct obd_import *imp);
int ptlrpc_init_import(struct obd_import *imp);
int ptlrpc_disconnect_import(struct obd_import *imp, int noclose);
int ptlrpc_import_recovery_state_machine(struct obd_import *imp);
/* ptlrpc/pack_generic.c */
int ptlrpc_reconnect_import(struct obd_import *imp);
-int lustre_msg_swabbed(struct lustre_msg *msg);
+/** @} */
+
+/**
+ * ptlrpc msg buffer and swab interface
+ *
+ * @{
+ */
+int ptlrpc_buf_need_swab(struct ptlrpc_request *req, const int inout,
+ int index);
+void ptlrpc_buf_set_swabbed(struct ptlrpc_request *req, const int inout,
+ int index);
+int ptlrpc_unpack_rep_msg(struct ptlrpc_request *req, int len);
+int ptlrpc_unpack_req_msg(struct ptlrpc_request *req, int len);
+
int lustre_msg_check_version(struct lustre_msg *msg, __u32 version);
void lustre_init_msg_v2(struct lustre_msg_v2 *msg, int count, __u32 *lens,
char **bufs);
int lustre_shrink_msg(struct lustre_msg *msg, int segment,
unsigned int newlen, int move_data);
void lustre_free_reply_state(struct ptlrpc_reply_state *rs);
+int __lustre_unpack_msg(struct lustre_msg *m, int len);
int lustre_msg_hdr_size(__u32 magic, int count);
int lustre_msg_size(__u32 magic, int count, __u32 *lengths);
int lustre_msg_size_v2(int count, __u32 *lengths);
int lustre_packed_msg_size(struct lustre_msg *msg);
int lustre_msg_early_size(void);
-int lustre_unpack_msg(struct lustre_msg *m, int len);
void *lustre_msg_buf_v2(struct lustre_msg_v2 *m, int n, int min_size);
void *lustre_msg_buf(struct lustre_msg *m, int n, int minlen);
int lustre_msg_buflen(struct lustre_msg *m, int n);
void lustre_msg_set_buflen(struct lustre_msg *m, int n, int len);
int lustre_msg_bufcount(struct lustre_msg *m);
char *lustre_msg_string (struct lustre_msg *m, int n, int max_len);
-void *lustre_swab_buf(struct lustre_msg *, int n, int minlen, void *swabber);
-void *lustre_swab_reqbuf(struct ptlrpc_request *req, int n, int minlen,
- void *swabber);
-void *lustre_swab_repbuf(struct ptlrpc_request *req, int n, int minlen,
- void *swabber);
__u32 lustre_msghdr_get_flags(struct lustre_msg *msg);
void lustre_msghdr_set_flags(struct lustre_msg *msg, __u32 flags);
__u32 lustre_msg_get_flags(struct lustre_msg *msg);
__u32 lustre_msg_get_opc(struct lustre_msg *msg);
__u64 lustre_msg_get_last_xid(struct lustre_msg *msg);
__u64 lustre_msg_get_last_committed(struct lustre_msg *msg);
+__u64 *lustre_msg_get_versions(struct lustre_msg *msg);
__u64 lustre_msg_get_transno(struct lustre_msg *msg);
__u64 lustre_msg_get_slv(struct lustre_msg *msg);
__u32 lustre_msg_get_limit(struct lustre_msg *msg);
__u32 lustre_msg_get_timeout(struct lustre_msg *msg);
__u32 lustre_msg_get_service_time(struct lustre_msg *msg);
__u32 lustre_msg_get_cksum(struct lustre_msg *msg);
+#if LUSTRE_VERSION_CODE < OBD_OCD_VERSION(2, 9, 0, 0)
+__u32 lustre_msg_calc_cksum(struct lustre_msg *msg, int compat18);
+#else
+# warning "remove checksum compatibility support for b1_8"
__u32 lustre_msg_calc_cksum(struct lustre_msg *msg);
+#endif
void lustre_msg_set_handle(struct lustre_msg *msg,struct lustre_handle *handle);
void lustre_msg_set_type(struct lustre_msg *msg, __u32 type);
void lustre_msg_set_opc(struct lustre_msg *msg, __u32 opc);
void lustre_msg_set_last_xid(struct lustre_msg *msg, __u64 last_xid);
void lustre_msg_set_last_committed(struct lustre_msg *msg,__u64 last_committed);
+void lustre_msg_set_versions(struct lustre_msg *msg, __u64 *versions);
void lustre_msg_set_transno(struct lustre_msg *msg, __u64 transno);
void lustre_msg_set_status(struct lustre_msg *msg, __u32 status);
void lustre_msg_set_conn_cnt(struct lustre_msg *msg, __u32 conn_cnt);
req->rq_replen = lustre_shrink_msg(req->rq_repmsg, segment,
newlen, move_data);
}
+/** @} */
+
+/** Change request phase of \a req to \a new_phase */
+static inline void
+ptlrpc_rqphase_move(struct ptlrpc_request *req, enum rq_phase new_phase)
+{
+ if (req->rq_phase == new_phase)
+ return;
+
+ if (new_phase == RQ_PHASE_UNREGISTERING) {
+ req->rq_next_phase = req->rq_phase;
+ if (req->rq_import)
+ cfs_atomic_inc(&req->rq_import->imp_unregistering);
+ }
+
+ if (req->rq_phase == RQ_PHASE_UNREGISTERING) {
+ if (req->rq_import)
+ cfs_atomic_dec(&req->rq_import->imp_unregistering);
+ }
+
+ DEBUG_REQ(D_INFO, req, "move req \"%s\" -> \"%s\"",
+ ptlrpc_rqphase2str(req), ptlrpc_phase2str(new_phase));
+
+ req->rq_phase = new_phase;
+}
+
+/**
+ * Returns true if request \a req got early reply and hard deadline is not met
+ */
+static inline int
+ptlrpc_client_early(struct ptlrpc_request *req)
+{
+ if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
+ req->rq_reply_deadline > cfs_time_current_sec())
+ return 0;
+ return req->rq_early;
+}
+
+/**
+ * Returns true if we got real reply from server for this request
+ */
+static inline int
+ptlrpc_client_replied(struct ptlrpc_request *req)
+{
+ if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
+ req->rq_reply_deadline > cfs_time_current_sec())
+ return 0;
+ return req->rq_replied;
+}
+
+/** Returns true if request \a req is in process of receiving server reply */
+static inline int
+ptlrpc_client_recv(struct ptlrpc_request *req)
+{
+ if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
+ req->rq_reply_deadline > cfs_time_current_sec())
+ return 1;
+ return req->rq_receiving_reply;
+}
+
+static inline int
+ptlrpc_client_recv_or_unlink(struct ptlrpc_request *req)
+{
+ int rc;
+
+ cfs_spin_lock(&req->rq_lock);
+ if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_REPL_UNLINK) &&
+ req->rq_reply_deadline > cfs_time_current_sec()) {
+ cfs_spin_unlock(&req->rq_lock);
+ return 1;
+ }
+ rc = req->rq_receiving_reply || req->rq_must_unlink;
+ cfs_spin_unlock(&req->rq_lock);
+ return rc;
+}
+
+static inline void
+ptlrpc_client_wake_req(struct ptlrpc_request *req)
+{
+ if (req->rq_set == NULL)
+ cfs_waitq_signal(&req->rq_reply_waitq);
+ else
+ cfs_waitq_signal(&req->rq_set->set_waitq);
+}
static inline void
ptlrpc_rs_addref(struct ptlrpc_reply_state *rs)
{
- LASSERT(atomic_read(&rs->rs_refcount) > 0);
- atomic_inc(&rs->rs_refcount);
+ LASSERT(cfs_atomic_read(&rs->rs_refcount) > 0);
+ cfs_atomic_inc(&rs->rs_refcount);
}
static inline void
ptlrpc_rs_decref(struct ptlrpc_reply_state *rs)
{
- LASSERT(atomic_read(&rs->rs_refcount) > 0);
- if (atomic_dec_and_test(&rs->rs_refcount))
+ LASSERT(cfs_atomic_read(&rs->rs_refcount) > 0);
+ if (cfs_atomic_dec_and_test(&rs->rs_refcount))
lustre_free_reply_state(rs);
}
}
}
+static inline int ptlrpc_send_limit_expired(struct ptlrpc_request *req)
+{
+ if (req->rq_delay_limit != 0 &&
+ cfs_time_before(cfs_time_add(req->rq_queued_time,
+ cfs_time_seconds(req->rq_delay_limit)),
+ cfs_time_current())) {
+ return 1;
+ }
+ return 0;
+}
+
+static inline int ptlrpc_no_resend(struct ptlrpc_request *req)
+{
+ if (!req->rq_no_resend && ptlrpc_send_limit_expired(req)) {
+ cfs_spin_lock(&req->rq_lock);
+ req->rq_no_resend = 1;
+ cfs_spin_unlock(&req->rq_lock);
+ }
+ return req->rq_no_resend;
+}
+
/* ldlm/ldlm_lib.c */
+/**
+ * Target client logic
+ * @{
+ */
int client_obd_setup(struct obd_device *obddev, struct lustre_cfg *lcfg);
int client_obd_cleanup(struct obd_device *obddev);
int client_connect_import(const struct lu_env *env,
- struct lustre_handle *conn, struct obd_device *obd,
+ struct obd_export **exp, struct obd_device *obd,
struct obd_uuid *cluuid, struct obd_connect_data *,
void *localdata);
int client_disconnect_export(struct obd_export *exp);
int client_import_add_conn(struct obd_import *imp, struct obd_uuid *uuid,
int priority);
int client_import_del_conn(struct obd_import *imp, struct obd_uuid *uuid);
+int client_import_find_conn(struct obd_import *imp, lnet_nid_t peer,
+ struct obd_uuid *uuid);
int import_set_conn_priority(struct obd_import *imp, struct obd_uuid *uuid);
+void client_destroy_import(struct obd_import *imp);
+/** @} */
+
+int server_disconnect_export(struct obd_export *exp);
/* ptlrpc/pinger.c */
+/**
+ * Pinger API (client side only)
+ * @{
+ */
+enum timeout_event {
+ TIMEOUT_GRANT = 1
+};
+struct timeout_item;
+typedef int (*timeout_cb_t)(struct timeout_item *, void *);
int ptlrpc_pinger_add_import(struct obd_import *imp);
int ptlrpc_pinger_del_import(struct obd_import *imp);
+int ptlrpc_add_timeout_client(int time, enum timeout_event event,
+ timeout_cb_t cb, void *data,
+ cfs_list_t *obd_list);
+int ptlrpc_del_timeout_client(cfs_list_t *obd_list,
+ enum timeout_event event);
+struct ptlrpc_request * ptlrpc_prep_ping(struct obd_import *imp);
+int ptlrpc_obd_ping(struct obd_device *obd);
cfs_time_t ptlrpc_suspend_wakeup_time(void);
#ifdef __KERNEL__
void ping_evictor_start(void);
#define ping_evictor_stop() do {} while (0)
#endif
int ptlrpc_check_and_wait_suspend(struct ptlrpc_request *req);
+/** @} */
+
+/* ptlrpc daemon bind policy */
+typedef enum {
+ /* all ptlrpcd threads are free mode */
+ PDB_POLICY_NONE = 1,
+ /* all ptlrpcd threads are bound mode */
+ PDB_POLICY_FULL = 2,
+ /* <free1 bound1> <free2 bound2> ... <freeN boundN> */
+ PDB_POLICY_PAIR = 3,
+ /* <free1 bound1> <bound1 free2> ... <freeN boundN> <boundN free1>,
+ * means each ptlrpcd[X] has two partners: thread[X-1] and thread[X+1]*/
+ PDB_POLICY_NEIGHBOR = 4,
+} pdb_policy_t;
+
+/* ptlrpc daemon load policy
+ * It is caller's duty to specify how to push the async RPC into some ptlrpcd
+ * queue, but it is not enforced, affected by "ptlrpcd_bind_policy". If it is
+ * "PDB_POLICY_FULL", then the RPC will be processed by the selected ptlrpcd,
+ * Otherwise, the RPC may be processed by the selected ptlrpcd or its partner,
+ * depends on which is scheduled firstly, to accelerate the RPC processing. */
+typedef enum {
+ /* on the same CPU core as the caller */
+ PDL_POLICY_SAME = 1,
+ /* within the same CPU partition, but not the same core as the caller */
+ PDL_POLICY_LOCAL = 2,
+ /* round-robin on all CPU cores, but not the same core as the caller */
+ PDL_POLICY_ROUND = 3,
+ /* the specified CPU core is preferred, but not enforced */
+ PDL_POLICY_PREFERRED = 4,
+} pdl_policy_t;
/* ptlrpc/ptlrpcd.c */
-int ptlrpcd_start(char *name, struct ptlrpcd_ctl *pc);
void ptlrpcd_stop(struct ptlrpcd_ctl *pc, int force);
void ptlrpcd_wake(struct ptlrpc_request *req);
-void ptlrpcd_add_req(struct ptlrpc_request *req);
+void ptlrpcd_add_req(struct ptlrpc_request *req, pdl_policy_t policy, int idx);
+void ptlrpcd_add_rqset(struct ptlrpc_request_set *set);
int ptlrpcd_addref(void);
void ptlrpcd_decref(void);
/* ptlrpc/lproc_ptlrpc.c */
+/**
+ * procfs output related functions
+ * @{
+ */
const char* ll_opcode2str(__u32 opcode);
#ifdef LPROCFS
void ptlrpc_lprocfs_register_obd(struct obd_device *obd);
static inline void ptlrpc_lprocfs_unregister_obd(struct obd_device *obd) {}
static inline void ptlrpc_lprocfs_brw(struct ptlrpc_request *req, int bytes) {}
#endif
+/** @} */
/* ptlrpc/llog_server.c */
int llog_origin_handle_create(struct ptlrpc_request *req);
/* ptlrpc/llog_client.c */
extern struct llog_operations llog_client_ops;
+/** @} net */
+
#endif
+/** @} PtlRPC */
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