X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Finclude%2Flustre_dlm.h;h=1b04e4c7d0d978f8a0532adc4caa8b4b15095eb7;hb=43c01b9d94e783295edc2d1432ed3af0076a0e51;hp=15cefc045c4f10e090df625d8ad5b1dc9f9e6b35;hpb=1317f6241b86e1fc90a4d2dc836e9a25eeaaeb04;p=fs%2Flustre-release.git diff --git a/lustre/include/lustre_dlm.h b/lustre/include/lustre_dlm.h index 15cefc0..1b04e4c 100644 --- a/lustre/include/lustre_dlm.h +++ b/lustre/include/lustre_dlm.h @@ -16,8 +16,8 @@ * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see [sun.com URL with a - * copy of GPLv2]. + * version 2 along with this program; If not, see + * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or @@ -26,8 +26,11 @@ * 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) 2010 Whamcloud, Inc + * */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -37,6 +40,11 @@ #ifndef _LUSTRE_DLM_H__ #define _LUSTRE_DLM_H__ +/** \defgroup ldlm ldlm + * + * @{ + */ + #if defined(__linux__) #include #elif defined(__APPLE__) @@ -51,8 +59,8 @@ #include #include #include -#include /* for obd_export, for LDLM_DEBUG */ #include /* for interval_node{}, ldlm_extent */ +#include struct obd_ops; struct obd_device; @@ -63,7 +71,7 @@ struct obd_device; /* 1.5 times the maximum 128 tasks available in VN mode */ #define LDLM_DEFAULT_LRU_SIZE 196 #else -#define LDLM_DEFAULT_LRU_SIZE (100 * num_online_cpus()) +#define LDLM_DEFAULT_LRU_SIZE (100 * cfs_num_online_cpus()) #endif #define LDLM_DEFAULT_MAX_ALIVE (cfs_time_seconds(36000)) #define LDLM_CTIME_AGE_LIMIT (10) @@ -95,7 +103,8 @@ typedef enum { #define LDLM_FL_BLOCK_WAIT 0x000008 #define LDLM_FL_CBPENDING 0x000010 /* this lock is being destroyed */ -#define LDLM_FL_AST_SENT 0x000020 /* blocking or cancel packet was sent */ +#define LDLM_FL_AST_SENT 0x000020 /* blocking or cancel packet was + * queued for sending. */ #define LDLM_FL_WAIT_NOREPROC 0x000040 /* not a real flag, not saved in lock */ #define LDLM_FL_CANCEL 0x000080 /* cancellation callback already run */ @@ -104,7 +113,7 @@ typedef enum { #define LDLM_FL_REPLAY 0x000100 #define LDLM_FL_INTENT_ONLY 0x000200 /* don't grant lock, just do intent */ -#define LDLM_FL_LOCAL_ONLY 0x000400 /* see ldlm_cli_cancel_unused */ +#define LDLM_FL_LOCAL_ONLY 0x000400 /* don't run the cancel callback under ldlm_cli_cancel_unused */ #define LDLM_FL_FAILED 0x000800 @@ -112,7 +121,7 @@ typedef enum { #define LDLM_FL_HAS_INTENT 0x001000 /* lock request has intent */ #define LDLM_FL_CANCELING 0x002000 /* lock cancel has already been sent */ #define LDLM_FL_LOCAL 0x004000 /* local lock (ie, no srv/cli split) */ -#define LDLM_FL_WARN 0x008000 /* see ldlm_cli_cancel_unused */ +/* was LDLM_FL_WARN until 2.0.0 0x008000 */ #define LDLM_FL_DISCARD_DATA 0x010000 /* discard (no writeback) on cancel */ #define LDLM_FL_NO_TIMEOUT 0x020000 /* Blocked by group lock - wait @@ -143,21 +152,15 @@ typedef enum { * list. */ #define LDLM_FL_KMS_IGNORE 0x200000 -/* Don't drop lock covering mmapped file in LRU */ -#define LDLM_FL_NO_LRU 0x400000 - /* Immediatelly cancel such locks when they block some other locks. Send - cancel notification to original lock holder, but expect no reply. */ + * cancel notification to original lock holder, but expect no reply. This is + * for clients (like liblustre) that cannot be expected to reliably response + * to blocking ast. */ #define LDLM_FL_CANCEL_ON_BLOCK 0x800000 /* Flags flags inherited from parent lock when doing intents. */ #define LDLM_INHERIT_FLAGS (LDLM_FL_CANCEL_ON_BLOCK) -/* These are flags that are mapped into the flags and ASTs of blocking locks */ -#define LDLM_AST_DISCARD_DATA 0x80000000 /* Add FL_DISCARD to blocking ASTs */ -/* Flags sent in AST lock_flags to be mapped into the receiving lock. */ -#define LDLM_AST_FLAGS (LDLM_FL_DISCARD_DATA) - /* completion ast to be executed */ #define LDLM_FL_CP_REQD 0x1000000 @@ -168,8 +171,7 @@ typedef enum { * w/o involving separate thread. in order to decrease cs rate */ #define LDLM_FL_ATOMIC_CB 0x4000000 -/* Cancel lock asynchronously. See ldlm_cli_cancel_unused_resource. */ -#define LDLM_FL_ASYNC 0x8000000 +/* was LDLM_FL_ASYNC until 2.0.0 0x8000000 */ /* It may happen that a client initiate 2 operations, e.g. unlink and mkdir, * such that server send blocking ast for conflict locks to this client for @@ -187,6 +189,27 @@ typedef enum { /* measure lock contention and return -EUSERS if locking contention is high */ #define LDLM_FL_DENY_ON_CONTENTION 0x40000000 +/* These are flags that are mapped into the flags and ASTs of blocking locks */ +#define LDLM_AST_DISCARD_DATA 0x80000000 /* Add FL_DISCARD to blocking ASTs */ + +/* Flags sent in AST lock_flags to be mapped into the receiving lock. */ +#define LDLM_AST_FLAGS (LDLM_FL_DISCARD_DATA) + +/* + * -------------------------------------------------------------------------- + * NOTE! Starting from this point, that is, LDLM_FL_* flags with values above + * 0x80000000 will not be sent over the wire. + * -------------------------------------------------------------------------- + */ + +/* Used for marking lock as an target for -EINTR while cp_ast sleep + * emulation + race with upcoming bl_ast. */ +#define LDLM_FL_FAIL_LOC 0x100000000ULL + +/* Used while processing the unused list to know that we have already + * handled this lock and decided to skip it */ +#define LDLM_FL_SKIPPED 0x200000000ULL + /* The blocking callback is overloaded to perform two functions. These flags * indicate which operation should be performed. */ #define LDLM_CB_BLOCKING 1 @@ -200,6 +223,7 @@ typedef enum { #define LCK_COMPAT_CR (LCK_COMPAT_CW | LCK_PR | LCK_PW) #define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX | LCK_GROUP) #define LCK_COMPAT_GROUP (LCK_GROUP | LCK_NL) +#define LCK_COMPAT_COS (LCK_COS) extern ldlm_mode_t lck_compat_array[]; @@ -240,7 +264,7 @@ static inline int lockmode_compat(ldlm_mode_t exist_mode, ldlm_mode_t new_mode) * led_lock * * lr_lock - * ns_unused_lock + * ns_lock * * lr_lvb_sem * lr_lock @@ -259,14 +283,25 @@ struct ldlm_pool_ops { int (*po_setup)(struct ldlm_pool *pl, int limit); }; -/* One second for pools thread check interval. */ +/** + * One second for pools thread check interval. Each pool has own period. + */ #define LDLM_POOLS_THREAD_PERIOD (1) -/* 5% margin for modest pools. See ldlm_pool.c for details. */ -#define LDLM_POOLS_MODEST_MARGIN (5) +/** + * ~6% margin for modest pools. See ldlm_pool.c for details. + */ +#define LDLM_POOLS_MODEST_MARGIN_SHIFT (4) + +/** + * Default recalc period for server side pools in sec. + */ +#define LDLM_POOL_SRV_DEF_RECALC_PERIOD (1) -/* A change to SLV in % after which we want to wake up pools thread asap. */ -#define LDLM_POOLS_FAST_SLV_CHANGE (50) +/** + * Default recalc period for client side pools in sec. + */ +#define LDLM_POOL_CLI_DEF_RECALC_PERIOD (10) struct ldlm_pool { /** @@ -280,27 +315,23 @@ struct ldlm_pool { /** * Lock for protecting slv/clv updates. */ - spinlock_t pl_lock; + cfs_spinlock_t pl_lock; /** * Number of allowed locks in in pool, both, client and server side. */ - atomic_t pl_limit; + cfs_atomic_t pl_limit; /** * Number of granted locks in */ - atomic_t pl_granted; + cfs_atomic_t pl_granted; /** * Grant rate per T. */ - atomic_t pl_grant_rate; + cfs_atomic_t pl_grant_rate; /** * Cancel rate per T. */ - atomic_t pl_cancel_rate; - /** - * Grant speed (GR-CR) per T. - */ - atomic_t pl_grant_speed; + cfs_atomic_t pl_cancel_rate; /** * Server lock volume. Protected by pl_lock. */ @@ -313,24 +344,24 @@ struct ldlm_pool { * Lock volume factor. SLV on client is calculated as following: * server_slv * lock_volume_factor. */ - atomic_t pl_lock_volume_factor; + cfs_atomic_t pl_lock_volume_factor; /** * Time when last slv from server was obtained. */ time_t pl_recalc_time; /** + * Recalc period for pool. + */ + time_t pl_recalc_period; + /** * Recalc and shrink ops. */ struct ldlm_pool_ops *pl_ops; /** - * Planned number of granted locks for next T. + * Number of planned locks for next period. */ int pl_grant_plan; /** - * Grant plan step for next T. - */ - int pl_grant_step; - /** * Pool statistics. */ struct lprocfs_stats *pl_stats; @@ -340,10 +371,14 @@ typedef int (*ldlm_res_policy)(struct ldlm_namespace *, struct ldlm_lock **, void *req_cookie, ldlm_mode_t mode, int flags, void *data); +typedef int (*ldlm_cancel_for_recovery)(struct ldlm_lock *lock); + struct ldlm_valblock_ops { int (*lvbo_init)(struct ldlm_resource *res); - int (*lvbo_update)(struct ldlm_resource *res, struct lustre_msg *m, - int buf_idx, int increase); + int (*lvbo_update)(struct ldlm_resource *res, + struct ptlrpc_request *r, + int increase); + int (*lvbo_free)(struct ldlm_resource *res); }; typedef enum { @@ -352,14 +387,6 @@ typedef enum { } ldlm_appetite_t; /* - * Default value for ->ns_shrink_thumb. If lock is not extent one its cost - * is one page. Here we have 256 pages which is 1M on i386. Thus by default - * all extent locks which have more than 1M long extent will be kept in lru, - * others (including ibits locks) will be canceled on memory pressure event. - */ -#define LDLM_LOCK_SHRINK_THUMB 256 - -/* * Default values for the "max_nolock_size", "contention_time" and * "contended_locks" namespace tunables. */ @@ -367,11 +394,41 @@ typedef enum { #define NS_DEFAULT_CONTENTION_SECONDS 2 #define NS_DEFAULT_CONTENDED_LOCKS 32 +struct ldlm_ns_bucket { + /** refer back */ + struct ldlm_namespace *nsb_namespace; + /** estimated lock callback time */ + struct adaptive_timeout nsb_at_estimate; +}; + +enum { + /** ldlm namespace lock stats */ + LDLM_NSS_LOCKS = 0, + LDLM_NSS_LAST +}; + +typedef enum { + /** invalide type */ + LDLM_NS_TYPE_UNKNOWN = 0, + /** mdc namespace */ + LDLM_NS_TYPE_MDC, + /** mds namespace */ + LDLM_NS_TYPE_MDT, + /** osc namespace */ + LDLM_NS_TYPE_OSC, + /** ost namespace */ + LDLM_NS_TYPE_OST, + /** mgc namespace */ + LDLM_NS_TYPE_MGC, + /** mgs namespace */ + LDLM_NS_TYPE_MGT, +} ldlm_ns_type_t; + struct ldlm_namespace { /** - * Namespace name. Used for logging, etc. + * Backward link to obd, required for ldlm pool to store new SLV. */ - char *ns_name; + struct obd_device *ns_obd; /** * Is this a client-side lock tree? @@ -379,64 +436,55 @@ struct ldlm_namespace { ldlm_side_t ns_client; /** - * Namespce connect flags supported by server (may be changed via proc, - * lru resize may be disabled/enabled). + * resource hash */ - __u64 ns_connect_flags; + cfs_hash_t *ns_rs_hash; - /** - * Client side orig connect flags supported by server. - */ - __u64 ns_orig_connect_flags; + /** + * serialize + */ + cfs_spinlock_t ns_lock; /** - * Hash table for namespace. + * big refcount (by bucket) */ - struct list_head *ns_hash; - spinlock_t ns_hash_lock; + cfs_atomic_t ns_bref; - /** - * Count of resources in the hash. - */ - __u32 ns_refcount; + /** + * Namespce connect flags supported by server (may be changed via proc, + * lru resize may be disabled/enabled). + */ + __u64 ns_connect_flags; /** - * All root resources in namespace. + * Client side orig connect flags supported by server. */ - struct list_head ns_root_list; + __u64 ns_orig_connect_flags; /** * Position in global namespace list. */ - struct list_head ns_list_chain; + cfs_list_t ns_list_chain; /** * All root resources in namespace. */ - struct list_head ns_unused_list; + cfs_list_t ns_unused_list; int ns_nr_unused; - spinlock_t ns_unused_lock; unsigned int ns_max_unused; unsigned int ns_max_age; - + unsigned int ns_timeouts; /** * Seconds. */ unsigned int ns_ctime_age_limit; /** - * Lower limit to number of pages in lock to keep it in cache. - */ - unsigned int ns_shrink_thumb; - - /** * Next debug dump, jiffies. */ cfs_time_t ns_next_dump; - atomic_t ns_locks; - __u64 ns_resources; ldlm_res_policy ns_policy; struct ldlm_valblock_ops *ns_lvbo; void *ns_lvbp; @@ -445,13 +493,13 @@ struct ldlm_namespace { ldlm_appetite_t ns_appetite; /** - * If more than @ns_contented_locks found, the resource considered - * as contended. + * If more than \a ns_contended_locks found, the resource is considered + * to be contended. */ unsigned ns_contended_locks; /** - * The resource remembers contended state during @ns_contention_time, + * The resource remembers contended state during \a ns_contention_time, * in seconds. */ unsigned ns_contention_time; @@ -462,11 +510,16 @@ struct ldlm_namespace { unsigned ns_max_nolock_size; /** - * Backward link to obd, required for ldlm pool to store new SLV. + * Limit of parallel AST RPC count. */ - struct obd_device *ns_obd; + unsigned ns_max_parallel_ast; - struct adaptive_timeout ns_at_estimate;/* estimated lock callback time*/ + /* callback to cancel locks before replaying it during recovery */ + ldlm_cancel_for_recovery ns_cancel_for_recovery; + /** + * ldlm lock stats + */ + struct lprocfs_stats *ns_stats; }; static inline int ns_is_client(struct ldlm_namespace *ns) @@ -495,15 +548,12 @@ static inline int ns_connect_lru_resize(struct ldlm_namespace *ns) return !!(ns->ns_connect_flags & OBD_CONNECT_LRU_RESIZE); } -/* - * - * Resource hash table - * - */ - -#define RES_HASH_BITS 10 -#define RES_HASH_SIZE (1UL << RES_HASH_BITS) -#define RES_HASH_MASK (RES_HASH_SIZE - 1) +static inline void ns_register_cancel(struct ldlm_namespace *ns, + ldlm_cancel_for_recovery arg) +{ + LASSERT(ns != NULL); + ns->ns_cancel_for_recovery = arg; +} struct ldlm_lock; @@ -513,11 +563,12 @@ typedef int (*ldlm_blocking_callback)(struct ldlm_lock *lock, typedef int (*ldlm_completion_callback)(struct ldlm_lock *lock, int flags, void *data); typedef int (*ldlm_glimpse_callback)(struct ldlm_lock *lock, void *data); +typedef unsigned long (*ldlm_weigh_callback)(struct ldlm_lock *lock); /* Interval node data for each LDLM_EXTENT lock */ struct ldlm_interval { struct interval_node li_node; /* node for tree mgmt */ - struct list_head li_group; /* the locks which have the same + cfs_list_t li_group; /* the locks which have the same * policy - group of the policy */ }; #define to_ldlm_interval(n) container_of(n, struct ldlm_interval, li_node) @@ -531,125 +582,287 @@ struct ldlm_interval_tree { struct interval_node *lit_root; /* actually ldlm_interval */ }; -struct ldlm_lock { - struct portals_handle l_handle; // must be first in the structure - atomic_t l_refc; - - /* internal spinlock protects l_resource. we should hold this lock - * first before grabbing res_lock.*/ - spinlock_t l_lock; - - /* ldlm_lock_change_resource() can change this */ - struct ldlm_resource *l_resource; - - /* protected by ns_hash_lock. FIXME */ - struct list_head l_lru; - - /* protected by lr_lock, linkage to resource's lock queues */ - struct list_head l_res_link; +#define LUSTRE_TRACKS_LOCK_EXP_REFS (1) - struct ldlm_interval *l_tree_node; /* tree node for ldlm_extent */ +/* Cancel flag. */ +typedef enum { + LCF_ASYNC = 0x1, /* Cancel locks asynchronously. */ + LCF_LOCAL = 0x2, /* Cancel locks locally, not notifing server */ + LCF_BL_AST = 0x4, /* Cancel locks marked as LDLM_FL_BL_AST + * in the same RPC */ +} ldlm_cancel_flags_t; + +struct ldlm_flock { + __u64 start; + __u64 end; + __u64 owner; + __u64 blocking_owner; + void *blocking_export; + __u32 pid; +}; - /* protected by led_lock */ - struct list_head l_export_chain; // per-export chain of locks +typedef union { + struct ldlm_extent l_extent; + struct ldlm_flock l_flock; + struct ldlm_inodebits l_inodebits; +} ldlm_policy_data_t; - /* protected by lr_lock */ - ldlm_mode_t l_req_mode; - ldlm_mode_t l_granted_mode; +void ldlm_convert_policy_to_wire(ldlm_type_t type, + const ldlm_policy_data_t *lpolicy, + ldlm_wire_policy_data_t *wpolicy); +void ldlm_convert_policy_to_local(ldlm_type_t type, + const ldlm_wire_policy_data_t *wpolicy, + ldlm_policy_data_t *lpolicy); +struct ldlm_lock { + /** + * Must be first in the structure. + */ + struct portals_handle l_handle; + /** + * Lock reference count. + */ + cfs_atomic_t l_refc; + /** + * Internal spinlock protects l_resource. we should hold this lock + * first before grabbing res_lock. + */ + cfs_spinlock_t l_lock; + /** + * ldlm_lock_change_resource() can change this. + */ + struct ldlm_resource *l_resource; + /** + * Protected by ns_hash_lock. List item for client side lru list. + */ + cfs_list_t l_lru; + /** + * Protected by lr_lock, linkage to resource's lock queues. + */ + cfs_list_t l_res_link; + /** + * Tree node for ldlm_extent. + */ + struct ldlm_interval *l_tree_node; + /** + * Protected by per-bucket exp->exp_lock_hash locks. Per export hash + * of locks. + */ + cfs_hlist_node_t l_exp_hash; + /** + * Protected by lr_lock. Requested mode. + */ + ldlm_mode_t l_req_mode; + /** + * Granted mode, also protected by lr_lock. + */ + ldlm_mode_t l_granted_mode; + /** + * Lock enqueue completion handler. + */ ldlm_completion_callback l_completion_ast; + /** + * Lock blocking ast handler. + */ ldlm_blocking_callback l_blocking_ast; + /** + * Lock glimpse handler. + */ ldlm_glimpse_callback l_glimpse_ast; + ldlm_weigh_callback l_weigh_ast; + + /** + * Lock export. + */ + struct obd_export *l_export; + /** + * Lock connection export. + */ + struct obd_export *l_conn_export; - struct obd_export *l_export; - struct obd_export *l_conn_export; + /** + * Remote lock handle. + */ + struct lustre_handle l_remote_handle; - struct lustre_handle l_remote_handle; - ldlm_policy_data_t l_policy_data; + ldlm_policy_data_t l_policy_data; - /* protected by lr_lock */ - __u32 l_flags; + /* + * Protected by lr_lock. Various counters: readers, writers, etc. + */ + __u64 l_flags; __u32 l_readers; __u32 l_writers; + /* + * Set for locks that were removed from class hash table and will be + * destroyed when last reference to them is released. Set by + * ldlm_lock_destroy_internal(). + * + * Protected by lock and resource locks. + */ __u8 l_destroyed; - - /* If the lock is granted, a process sleeps on this waitq to learn when + /** + * flag whether this is a server namespace lock + */ + __u8 l_ns_srv; + /** + * If the lock is granted, a process sleeps on this waitq to learn when * it's no longer in use. If the lock is not granted, a process sleeps - * on this waitq to learn when it becomes granted. */ + * on this waitq to learn when it becomes granted. + */ cfs_waitq_t l_waitq; - struct timeval l_enqueued_time; - cfs_time_t l_last_used; /* jiffies */ + /** + * Seconds. it will be updated if there is any activity related to + * the lock, e.g. enqueue the lock or send block AST. + */ + cfs_time_t l_last_activity; + + /** + * Jiffies. Should be converted to time if needed. + */ + cfs_time_t l_last_used; + struct ldlm_extent l_req_extent; - /* Client-side-only members */ - __u32 l_lvb_len; /* temporary storage for */ - void *l_lvb_data; /* an LVB received during */ - void *l_lvb_swabber; /* an enqueue */ + /* + * Client-side-only members. + */ + + /** + * Temporary storage for an LVB received during an enqueue operation. + */ + __u32 l_lvb_len; + void *l_lvb_data; + void *l_ast_data; - spinlock_t l_extents_list_lock; - struct list_head l_extents_list; - struct list_head l_cache_locks_list; + /* + * Server-side-only members. + */ - /* Server-side-only members */ + /** connection cookie for the client originated the operation. */ + __u64 l_client_cookie; - /* protected by elt_lock */ - struct list_head l_pending_chain; /* callbacks pending */ - cfs_time_t l_callback_timeout; /* jiffies */ + /** + * Protected by elt_lock. Callbacks pending. + */ + cfs_list_t l_pending_chain; + + cfs_time_t l_callback_timeout; + + /** + * Pid which created this lock. + */ + __u32 l_pid; - __u32 l_pid; /* pid which created this lock */ + /** + * For ldlm_add_ast_work_item(). + */ + cfs_list_t l_bl_ast; + /** + * For ldlm_add_ast_work_item(). + */ + cfs_list_t l_cp_ast; + /** + * For ldlm_add_ast_work_item(). + */ + cfs_list_t l_rk_ast; - /* for ldlm_add_ast_work_item() */ - struct list_head l_bl_ast; - struct list_head l_cp_ast; struct ldlm_lock *l_blocking_lock; int l_bl_ast_run; - /* protected by lr_lock, linkages to "skip lists" */ - struct list_head l_sl_mode; - struct list_head l_sl_policy; + /** + * Protected by lr_lock, linkages to "skip lists". + */ + cfs_list_t l_sl_mode; + cfs_list_t l_sl_policy; + struct lu_ref l_reference; +#if LUSTRE_TRACKS_LOCK_EXP_REFS + /* Debugging stuff for bug 20498, for tracking export + references. */ + /** number of export references taken */ + int l_exp_refs_nr; + /** link all locks referencing one export */ + cfs_list_t l_exp_refs_link; + /** referenced export object */ + struct obd_export *l_exp_refs_target; +#endif }; struct ldlm_resource { - struct ldlm_namespace *lr_namespace; + struct ldlm_ns_bucket *lr_ns_bucket; /* protected by ns_hash_lock */ - struct list_head lr_hash; - struct ldlm_resource *lr_parent; /* 0 for a root resource */ - struct list_head lr_children; /* list head for child resources */ - struct list_head lr_childof; /* part of ns_root_list if root res, - * part of lr_children if child */ - spinlock_t lr_lock; + cfs_hlist_node_t lr_hash; + cfs_spinlock_t lr_lock; /* protected by lr_lock */ - struct list_head lr_granted; - struct list_head lr_converting; - struct list_head lr_waiting; + cfs_list_t lr_granted; + cfs_list_t lr_converting; + cfs_list_t lr_waiting; ldlm_mode_t lr_most_restr; ldlm_type_t lr_type; /* LDLM_{PLAIN,EXTENT,FLOCK} */ struct ldlm_res_id lr_name; - atomic_t lr_refcount; + cfs_atomic_t lr_refcount; struct ldlm_interval_tree lr_itree[LCK_MODE_NUM]; /* interval trees*/ /* Server-side-only lock value block elements */ - struct semaphore lr_lvb_sem; + /** to serialize lvbo_init */ + cfs_semaphore_t lr_lvb_sem; __u32 lr_lvb_len; + /** protect by lr_lock */ void *lr_lvb_data; /* when the resource was considered as contended */ cfs_time_t lr_contention_time; + /** + * List of references to this resource. For debugging. + */ + struct lu_ref lr_reference; + + struct inode *lr_lvb_inode; }; +static inline char * +ldlm_ns_name(struct ldlm_namespace *ns) +{ + return ns->ns_rs_hash->hs_name; +} + +static inline struct ldlm_namespace * +ldlm_res_to_ns(struct ldlm_resource *res) +{ + return res->lr_ns_bucket->nsb_namespace; +} + +static inline struct ldlm_namespace * +ldlm_lock_to_ns(struct ldlm_lock *lock) +{ + return ldlm_res_to_ns(lock->l_resource); +} + +static inline char * +ldlm_lock_to_ns_name(struct ldlm_lock *lock) +{ + return ldlm_ns_name(ldlm_lock_to_ns(lock)); +} + +static inline struct adaptive_timeout * +ldlm_lock_to_ns_at(struct ldlm_lock *lock) +{ + return &lock->l_resource->lr_ns_bucket->nsb_at_estimate; +} + struct ldlm_ast_work { - struct ldlm_lock *w_lock; - int w_blocking; - struct ldlm_lock_desc w_desc; - struct list_head w_list; - int w_flags; - void *w_data; - int w_datalen; + struct ldlm_lock *w_lock; + int w_blocking; + struct ldlm_lock_desc w_desc; + cfs_list_t w_list; + int w_flags; + void *w_data; + int w_datalen; }; /* ldlm_enqueue parameters common */ @@ -659,7 +872,9 @@ struct ldlm_enqueue_info { void *ei_cb_bl; /* blocking lock callback */ void *ei_cb_cp; /* lock completion callback */ void *ei_cb_gl; /* lock glimpse callback */ + void *ei_cb_wg; /* lock weigh callback */ void *ei_cbdata; /* Data to be passed into callbacks. */ + short ei_async:1; /* async request */ }; extern struct obd_ops ldlm_obd_ops; @@ -669,7 +884,7 @@ extern char *ldlm_typename[]; extern char *ldlm_it2str(int it); #ifdef LIBCFS_DEBUG #define ldlm_lock_debug(cdls, level, lock, file, func, line, fmt, a...) do { \ - CHECK_STACK(); \ + CFS_CHECK_STACK(); \ \ if (((level) & D_CANTMASK) != 0 || \ ((libcfs_debug & (level)) != 0 && \ @@ -687,21 +902,26 @@ void _ldlm_lock_debug(struct ldlm_lock *lock, __u32 mask, ...) __attribute__ ((format (printf, 4, 5))); -#define LDLM_ERROR(lock, fmt, a...) do { \ +#define LDLM_DEBUG_LIMIT(mask, lock, fmt, a...) do { \ static cfs_debug_limit_state_t _ldlm_cdls; \ - ldlm_lock_debug(&_ldlm_cdls, D_ERROR, lock, \ + ldlm_lock_debug(&_ldlm_cdls, mask, lock, \ __FILE__, __FUNCTION__, __LINE__, \ "### " fmt , ##a); \ } while (0) +#define LDLM_ERROR(lock, fmt, a...) LDLM_DEBUG_LIMIT(D_ERROR, lock, fmt, ## a) +#define LDLM_WARN(lock, fmt, a...) LDLM_DEBUG_LIMIT(D_WARNING, lock, fmt, ## a) + #define LDLM_DEBUG(lock, fmt, a...) do { \ ldlm_lock_debug(NULL, D_DLMTRACE, lock, \ __FILE__, __FUNCTION__, __LINE__, \ "### " fmt , ##a); \ } while (0) -#else -#define LDLM_DEBUG(lock, fmt, a...) ((void)0) -#define LDLM_ERROR(lock, fmt, a...) ((void)0) +#else /* !LIBCFS_DEBUG */ +# define LDLM_DEBUG(lock, fmt, a...) ((void)0) +# define LDLM_ERROR(lock, fmt, a...) ((void)0) +# define ldlm_lock_debuf(cdls, level, lock, file, func, line, fmt, a...) \ + ((void)0) #endif #define LDLM_DEBUG_NOLOCK(format, a...) \ @@ -709,7 +929,7 @@ void _ldlm_lock_debug(struct ldlm_lock *lock, __u32 mask, typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags, int first_enq, ldlm_error_t *err, - struct list_head *work_list); + cfs_list_t *work_list); /* * Iterators. @@ -723,13 +943,11 @@ typedef int (*ldlm_res_iterator_t)(struct ldlm_resource *, void *); int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter, void *closure); -int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter, - void *closure); -int ldlm_namespace_foreach_res(struct ldlm_namespace *ns, - ldlm_res_iterator_t iter, void *closure); +void ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter, + void *closure); int ldlm_replay_locks(struct obd_import *imp); -void ldlm_resource_iterate(struct ldlm_namespace *, const struct ldlm_res_id *, +int ldlm_resource_iterate(struct ldlm_namespace *, const struct ldlm_res_id *, ldlm_iterator_t iter, void *data); /* ldlm_flock.c */ @@ -751,10 +969,12 @@ int ldlm_handle_cancel(struct ptlrpc_request *req); int ldlm_request_cancel(struct ptlrpc_request *req, const struct ldlm_request *dlm_req, int first); int ldlm_del_waiting_lock(struct ldlm_lock *lock); -int ldlm_refresh_waiting_lock(struct ldlm_lock *lock); +int ldlm_refresh_waiting_lock(struct ldlm_lock *lock, int timeout); void ldlm_revoke_export_locks(struct obd_export *exp); int ldlm_get_ref(void); void ldlm_put_ref(void); +int ldlm_init_export(struct obd_export *exp); +void ldlm_destroy_export(struct obd_export *exp); /* ldlm_lock.c */ ldlm_processing_policy ldlm_get_processing_policy(struct ldlm_resource *res); @@ -763,30 +983,63 @@ void ldlm_lock2handle(const struct ldlm_lock *lock, struct lustre_handle *lockh); struct ldlm_lock *__ldlm_handle2lock(const struct lustre_handle *, int flags); void ldlm_cancel_callback(struct ldlm_lock *); -int ldlm_lock_set_data(struct lustre_handle *, void *data); int ldlm_lock_remove_from_lru(struct ldlm_lock *); -struct ldlm_lock *ldlm_handle2lock_ns(struct ldlm_namespace *, - const struct lustre_handle *); +int ldlm_lock_set_data(struct lustre_handle *, void *); static inline struct ldlm_lock *ldlm_handle2lock(const struct lustre_handle *h) { return __ldlm_handle2lock(h, 0); } +#define LDLM_LOCK_REF_DEL(lock) \ + lu_ref_del(&lock->l_reference, "handle", cfs_current()) + +static inline struct ldlm_lock * +ldlm_handle2lock_long(const struct lustre_handle *h, int flags) +{ + struct ldlm_lock *lock; + + lock = __ldlm_handle2lock(h, flags); + if (lock != NULL) + LDLM_LOCK_REF_DEL(lock); + return lock; +} + static inline int ldlm_res_lvbo_update(struct ldlm_resource *res, - struct lustre_msg *m, int buf_idx, - int increase) + struct ptlrpc_request *r, int increase) { - if (res->lr_namespace->ns_lvbo && - res->lr_namespace->ns_lvbo->lvbo_update) { - return res->lr_namespace->ns_lvbo->lvbo_update(res, m, buf_idx, - increase); + if (ldlm_res_to_ns(res)->ns_lvbo && + ldlm_res_to_ns(res)->ns_lvbo->lvbo_update) { + return ldlm_res_to_ns(res)->ns_lvbo->lvbo_update(res, r, + increase); } return 0; } +int ldlm_error2errno(ldlm_error_t error); +ldlm_error_t ldlm_errno2error(int err_no); /* don't call it `errno': this + * confuses user-space. */ +#if LUSTRE_TRACKS_LOCK_EXP_REFS +void ldlm_dump_export_locks(struct obd_export *exp); +#endif + +/** + * Release a temporary lock reference obtained by ldlm_handle2lock() or + * __ldlm_handle2lock(). + */ #define LDLM_LOCK_PUT(lock) \ do { \ + LDLM_LOCK_REF_DEL(lock); \ + /*LDLM_DEBUG((lock), "put");*/ \ + ldlm_lock_put(lock); \ +} while (0) + +/** + * Release a lock reference obtained by some other means (see + * LDLM_LOCK_PUT()). + */ +#define LDLM_LOCK_RELEASE(lock) \ +do { \ /*LDLM_DEBUG((lock), "put");*/ \ ldlm_lock_put(lock); \ } while (0) @@ -798,17 +1051,17 @@ do { \ lock; \ }) -#define ldlm_lock_list_put(head, member, count) \ -({ \ - struct ldlm_lock *_lock, *_next; \ - int c = count; \ - list_for_each_entry_safe(_lock, _next, head, member) { \ - if (c-- == 0) \ - break; \ - list_del_init(&_lock->member); \ - LDLM_LOCK_PUT(_lock); \ - } \ - LASSERT(c <= 0); \ +#define ldlm_lock_list_put(head, member, count) \ +({ \ + struct ldlm_lock *_lock, *_next; \ + int c = count; \ + cfs_list_for_each_entry_safe(_lock, _next, head, member) { \ + if (c-- == 0) \ + break; \ + cfs_list_del_init(&_lock->member); \ + LDLM_LOCK_RELEASE(_lock); \ + } \ + LASSERT(c <= 0); \ }) struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock); @@ -816,19 +1069,19 @@ void ldlm_lock_put(struct ldlm_lock *lock); void ldlm_lock_destroy(struct ldlm_lock *lock); void ldlm_lock2desc(struct ldlm_lock *lock, struct ldlm_lock_desc *desc); void ldlm_lock_addref(struct lustre_handle *lockh, __u32 mode); +int ldlm_lock_addref_try(struct lustre_handle *lockh, __u32 mode); void ldlm_lock_decref(struct lustre_handle *lockh, __u32 mode); void ldlm_lock_decref_and_cancel(struct lustre_handle *lockh, __u32 mode); void ldlm_lock_allow_match(struct ldlm_lock *lock); -int ldlm_lock_fast_match(struct ldlm_lock *, int, obd_off, obd_off, void **); -void ldlm_lock_fast_release(void *, int); +void ldlm_lock_allow_match_locked(struct ldlm_lock *lock); ldlm_mode_t ldlm_lock_match(struct ldlm_namespace *ns, int flags, const struct ldlm_res_id *, ldlm_type_t type, ldlm_policy_data_t *, ldlm_mode_t mode, - struct lustre_handle *); + struct lustre_handle *, int unref); struct ldlm_resource *ldlm_lock_convert(struct ldlm_lock *lock, int new_mode, __u32 *flags); +void ldlm_lock_downgrade(struct ldlm_lock *lock, int new_mode); void ldlm_lock_cancel(struct ldlm_lock *lock); -void ldlm_cancel_locks_for_export(struct obd_export *export); void ldlm_reprocess_all(struct ldlm_resource *res); void ldlm_reprocess_all_ns(struct ldlm_namespace *ns); void ldlm_lock_dump(int level, struct ldlm_lock *lock, int pos); @@ -838,7 +1091,8 @@ void ldlm_unlink_lock_skiplist(struct ldlm_lock *req); /* resource.c */ struct ldlm_namespace * ldlm_namespace_new(struct obd_device *obd, char *name, - ldlm_side_t client, ldlm_appetite_t apt); + ldlm_side_t client, ldlm_appetite_t apt, + ldlm_ns_type_t ns_type); int ldlm_namespace_cleanup(struct ldlm_namespace *ns, int flags); void ldlm_namespace_free(struct ldlm_namespace *ns, struct obd_import *imp, int force); @@ -846,10 +1100,8 @@ void ldlm_namespace_register(struct ldlm_namespace *ns, ldlm_side_t client); void ldlm_namespace_unregister(struct ldlm_namespace *ns, ldlm_side_t client); void ldlm_namespace_move_locked(struct ldlm_namespace *ns, ldlm_side_t client); struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t client); -void ldlm_namespace_get_locked(struct ldlm_namespace *ns); -void ldlm_namespace_put_locked(struct ldlm_namespace *ns, int wakeup); void ldlm_namespace_get(struct ldlm_namespace *ns); -void ldlm_namespace_put(struct ldlm_namespace *ns, int wakeup); +void ldlm_namespace_put(struct ldlm_namespace *ns); int ldlm_proc_setup(void); #ifdef LPROCFS void ldlm_proc_cleanup(void); @@ -864,7 +1116,8 @@ struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns, ldlm_type_t type, int create); struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res); int ldlm_resource_putref(struct ldlm_resource *res); -void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *head, +void ldlm_resource_add_lock(struct ldlm_resource *res, + cfs_list_t *head, struct ldlm_lock *lock); void ldlm_resource_unlink_lock(struct ldlm_lock *lock); void ldlm_res2desc(struct ldlm_resource *res, struct ldlm_resource_desc *desc); @@ -874,40 +1127,50 @@ void ldlm_resource_dump(int level, struct ldlm_resource *); int ldlm_lock_change_resource(struct ldlm_namespace *, struct ldlm_lock *, const struct ldlm_res_id *); +#define LDLM_RESOURCE_ADDREF(res) do { \ + lu_ref_add_atomic(&(res)->lr_reference, __FUNCTION__, cfs_current()); \ +} while (0) + +#define LDLM_RESOURCE_DELREF(res) do { \ + lu_ref_del(&(res)->lr_reference, __FUNCTION__, cfs_current()); \ +} while (0) + struct ldlm_callback_suite { ldlm_completion_callback lcs_completion; ldlm_blocking_callback lcs_blocking; ldlm_glimpse_callback lcs_glimpse; + ldlm_weigh_callback lcs_weigh; }; /* ldlm_request.c */ int ldlm_expired_completion_wait(void *data); +int ldlm_blocking_ast_nocheck(struct ldlm_lock *lock); int ldlm_blocking_ast(struct ldlm_lock *lock, struct ldlm_lock_desc *desc, void *data, int flag); int ldlm_glimpse_ast(struct ldlm_lock *lock, void *reqp); +int ldlm_completion_ast_async(struct ldlm_lock *lock, int flags, void *data); int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data); int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp, struct ldlm_enqueue_info *einfo, const struct ldlm_res_id *res_id, - ldlm_policy_data_t *policy, int *flags, - void *lvb, __u32 lvb_len, void *lvb_swabber, - struct lustre_handle *lockh, int async); + ldlm_policy_data_t const *policy, int *flags, + void *lvb, __u32 lvb_len, struct lustre_handle *lockh, + int async); int ldlm_prep_enqueue_req(struct obd_export *exp, struct ptlrpc_request *req, - struct list_head *cancels, + cfs_list_t *cancels, int count); int ldlm_prep_elc_req(struct obd_export *exp, struct ptlrpc_request *req, int version, int opc, int canceloff, - struct list_head *cancels, int count); + cfs_list_t *cancels, int count); int ldlm_handle_enqueue0(struct ldlm_namespace *ns, struct ptlrpc_request *req, const struct ldlm_request *dlm_req, const struct ldlm_callback_suite *cbs); int ldlm_cli_enqueue_fini(struct obd_export *exp, struct ptlrpc_request *req, ldlm_type_t type, __u8 with_policy, ldlm_mode_t mode, int *flags, void *lvb, __u32 lvb_len, - void *lvb_swabber, struct lustre_handle *lockh, - int rc); + struct lustre_handle *lockh, int rc); int ldlm_cli_enqueue_local(struct ldlm_namespace *ns, const struct ldlm_res_id *res_id, ldlm_type_t type, ldlm_policy_data_t *policy, @@ -915,7 +1178,8 @@ int ldlm_cli_enqueue_local(struct ldlm_namespace *ns, ldlm_blocking_callback blocking, ldlm_completion_callback completion, ldlm_glimpse_callback glimpse, - void *data, __u32 lvb_len, void *lvb_swabber, + void *data, __u32 lvb_len, + const __u64 *client_cookie, struct lustre_handle *lockh); int ldlm_server_ast(struct lustre_handle *lockh, struct ldlm_lock_desc *new, void *data, __u32 data_len); @@ -925,22 +1189,24 @@ int ldlm_handle_convert0(struct ptlrpc_request *req, const struct ldlm_request *dlm_req); int ldlm_cli_cancel(struct lustre_handle *lockh); int ldlm_cli_cancel_unused(struct ldlm_namespace *, const struct ldlm_res_id *, - int flags, void *opaque); + ldlm_cancel_flags_t flags, void *opaque); int ldlm_cli_cancel_unused_resource(struct ldlm_namespace *ns, const struct ldlm_res_id *res_id, ldlm_policy_data_t *policy, - ldlm_mode_t mode, int flags, void *opaque); -int ldlm_cli_cancel_req(struct obd_export *exp, struct list_head *head, - int count, int flags); -int ldlm_cli_join_lru(struct ldlm_namespace *, - const struct ldlm_res_id *, int join); + ldlm_mode_t mode, + ldlm_cancel_flags_t flags, + void *opaque); +int ldlm_cli_cancel_req(struct obd_export *exp, cfs_list_t *head, + int count, ldlm_cancel_flags_t flags); int ldlm_cancel_resource_local(struct ldlm_resource *res, - struct list_head *cancels, + cfs_list_t *cancels, ldlm_policy_data_t *policy, ldlm_mode_t mode, int lock_flags, - int cancel_flags, void *opaque); -int ldlm_cli_cancel_list(struct list_head *head, int count, - struct ptlrpc_request *req, int flags); + ldlm_cancel_flags_t cancel_flags, void *opaque); +int ldlm_cli_cancel_list_local(cfs_list_t *cancels, int count, + ldlm_cancel_flags_t flags); +int ldlm_cli_cancel_list(cfs_list_t *head, int count, + struct ptlrpc_request *req, ldlm_cancel_flags_t flags); /* mds/handler.c */ /* This has to be here because recursive inclusion sucks. */ @@ -958,14 +1224,30 @@ void intent_set_disposition(struct ldlm_reply *rep, int flag); #define IOC_LDLM_REGRESS_STOP _IOWR('f', 43, long) #define IOC_LDLM_MAX_NR 43 +/** + * "Modes" of acquiring lock_res, necessary to tell lockdep that taking more + * than one lock_res is dead-lock safe. + */ +enum lock_res_type { + LRT_NORMAL, + LRT_NEW +}; + static inline void lock_res(struct ldlm_resource *res) { - spin_lock(&res->lr_lock); + cfs_spin_lock(&res->lr_lock); +} + +static inline void lock_res_nested(struct ldlm_resource *res, + enum lock_res_type mode) +{ + cfs_spin_lock_nested(&res->lr_lock, mode); } + static inline void unlock_res(struct ldlm_resource *res) { - spin_unlock(&res->lr_lock); + cfs_spin_unlock(&res->lr_lock); } static inline void check_res_locked(struct ldlm_resource *res) @@ -980,7 +1262,6 @@ void unlock_res_and_lock(struct ldlm_lock *lock); void ldlm_pools_recalc(ldlm_side_t client); int ldlm_pools_init(void); void ldlm_pools_fini(void); -void ldlm_pools_wakeup(void); int ldlm_pool_init(struct ldlm_pool *pl, struct ldlm_namespace *ns, int idx, ldlm_side_t client); @@ -998,5 +1279,7 @@ void ldlm_pool_set_clv(struct ldlm_pool *pl, __u64 clv); void ldlm_pool_set_limit(struct ldlm_pool *pl, __u32 limit); void ldlm_pool_add(struct ldlm_pool *pl, struct ldlm_lock *lock); void ldlm_pool_del(struct ldlm_pool *pl, struct ldlm_lock *lock); -#endif +/** @} ldlm */ + +#endif