#ifndef _LUSTRE_DLM_H__
#define _LUSTRE_DLM_H__
-#include <linux/kp30.h>
-#include <linux/list.h>
+#ifdef __KERNEL__
+
+#include <linux/obd_class.h>
+#include <linux/lustre_net.h>
#define OBD_LDLM_DEVICENAME "ldlm"
-typedef int cluster_host;
-typedef int cluster_pid;
+typedef enum {
+ ELDLM_OK = 0,
+
+ ELDLM_LOCK_CHANGED = 300,
+ ELDLM_LOCK_ABORTED = 301,
+ ELDLM_RESOURCE_FREED = 302,
+
+ ELDLM_NAMESPACE_EXISTS = 400,
+ ELDLM_BAD_NAMESPACE = 401
+} ldlm_error_t;
+
+#define LDLM_NAMESPACE_SERVER 0
+#define LDLM_NAMESPACE_CLIENT 1
-/* lock types */
-typedef enum {
- LCK_EX,
- LCK_PW,
- LCK_PR,
- LCK_CW,
- LCK_CR,
- LCK_NL
-} ldlm_mode_t;
+#define LDLM_FL_LOCK_CHANGED (1 << 0)
+#define LDLM_FL_BLOCK_GRANTED (1 << 1)
+#define LDLM_FL_BLOCK_CONV (1 << 2)
+#define LDLM_FL_BLOCK_WAIT (1 << 3)
+#define LDLM_FL_CBPENDING (1 << 4)
+#define LDLM_FL_AST_SENT (1 << 5)
+#define LDLM_FL_DESTROYED (1 << 6)
-#define L2B(c) (1<<c)
+#define L2B(c) (1 << c)
/* compatibility matrix */
#define LCK_COMPAT_EX L2B(LCK_NL)
#define LCK_COMPAT_NL (LCK_COMPAT_CR | L2B(LCK_EX))
static ldlm_mode_t lck_compat_array[] = {
- LCK_COMPAT_EX,
- LCK_COMPAT_PW,
- LCK_COMPAT_PR,
- LCK_COMPAT_CW,
- LCK_COMPAT_CR,
- LCK_COMPAT_NL
+ [LCK_EX] LCK_COMPAT_EX,
+ [LCK_PW] LCK_COMPAT_PW,
+ [LCK_PR] LCK_COMPAT_PR,
+ [LCK_CW] LCK_COMPAT_CW,
+ [LCK_CR] LCK_COMPAT_CR,
+ [LCK_NL] LCK_COMPAT_NL
};
-static inline int lockmode_compat(ldlm_mode_t a, ldlm_mode_t b)
+static inline int lockmode_compat(ldlm_mode_t exist, ldlm_mode_t new)
{
- if ( 0 <= a && a <= 5 ) {
- BUG();
- }
- if( 0 <= b && b <= 5 ) {
- BUG();
- }
-
- return 1 && (lck_compat_array[a] & L2B(b));
+ if (exist < LCK_EX || exist > LCK_NL)
+ LBUG();
+ if (new < LCK_EX || new > LCK_NL)
+ LBUG();
+
+ return (lck_compat_array[exist] & L2B(new));
}
/*
*/
struct ldlm_namespace {
- struct list_head ns_link; /* in the list of ns's */
- __u32 ns_id; /* identifier of ns */
- struct list_head *ns_hash; /* hash table for ns */
- struct list_head ns_root_list; /* all root resources in ns */
+ char *ns_name;
+ struct ptlrpc_client ns_rpc_client; /* used for revocation callbacks */
+ __u32 ns_client; /* is this a client-side lock tree? */
+ struct list_head *ns_hash; /* hash table for ns */
+ __u32 ns_refcount; /* count of resources in the hash */
+ struct list_head ns_root_list; /* all root resources in ns */
+ struct lustre_lock ns_lock; /* protects hash, refcount, list */
};
/*
*
*/
-#define RES_HASH_BITS 18
+#define RES_HASH_BITS 14
#define RES_HASH_SIZE (1UL << RES_HASH_BITS)
#define RES_HASH_MASK (RES_HASH_SIZE - 1)
-#define RES_NAME_SIZE 6
-#define RES_VERSION_SIZE 4
+struct ldlm_lock;
-struct ldlm_resource {
- struct list_head lr_hash;
- struct list_head lr_rootlink; /* link all root resources in NS */
- 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 child list of parent */
-
- struct list_head lr_granted;
- struct list_head lr_converting;
- struct list_head lr_waiting;
- ldlm_mode_t lr_most_restr;
- struct ldlm_resource *lr_root;
- //XXX cluster_host lr_master;
- __u32 lr_name[RES_NAME_SIZE];
- __u32 lr_version[RES_VERSION_SIZE];
-};
+typedef int (*ldlm_lock_callback)(struct lustre_handle *lockh,
+ struct ldlm_lock_desc *new, void *data,
+ __u32 data_len, struct ptlrpc_request **req);
struct ldlm_lock {
- struct ldlm_resource *lb_resource;
- struct ldlm_lock *lb_parent;
- struct list_head lb_children;
- struct list_head lb_childof;
- unsigned long lb_id;
- ldlm_mode_t lb_req_mode;
- ldlm_mode_t lb_granted_mode;
- void *lb_completion_ast;
- void *lb_blocking_ast;
- void *lb_event;
- //XXX cluster_host lb_holder;
- __u32 lb_version[RES_VERSION_SIZE];
+ __u64 l_random;
+ int l_refc;
+ struct ldlm_resource *l_resource;
+ struct ldlm_lock *l_parent;
+ struct list_head l_children;
+ struct list_head l_childof;
+ struct list_head l_res_link; /*position in one of three res lists*/
+ atomic_t l_refcount;
+
+ ldlm_mode_t l_req_mode;
+ ldlm_mode_t l_granted_mode;
+
+ ldlm_lock_callback l_completion_ast;
+ ldlm_lock_callback l_blocking_ast;
+
+ struct ptlrpc_connection *l_connection;
+ struct ptlrpc_client *l_client;
+ __u32 l_flags;
+ struct lustre_handle l_remote_handle;
+ void *l_data;
+ __u32 l_data_len;
+ void *l_cookie;
+ int l_cookie_len;
+ struct ldlm_extent l_extent;
+ __u32 l_version[RES_VERSION_SIZE];
+
+ __u32 l_readers;
+ __u32 l_writers;
+
+ /* 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. */
+ wait_queue_head_t l_waitq;
};
-struct ldlm_obd {
- struct list_head ldlm_namespaces;
+typedef int (*ldlm_res_compat)(struct ldlm_lock *child, struct ldlm_lock *new);
+typedef int (*ldlm_res_policy)(struct ldlm_lock *lock, void *req_cookie,
+ ldlm_mode_t mode, void *data);
+
+#define LDLM_PLAIN 10
+#define LDLM_EXTENT 11
+#define LDLM_MDSINTENT 12
+
+#define LDLM_MIN_TYPE 10
+#define LDLM_MAX_TYPE 12
+
+extern ldlm_res_compat ldlm_res_compat_table [];
+extern ldlm_res_policy ldlm_res_policy_table [];
+
+struct ldlm_resource {
+ struct ldlm_namespace *lr_namespace;
+ struct list_head lr_hash;
+ struct list_head lr_rootlink; /* link all root resources in NS */
+ 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 child list of parent */
+
+ struct list_head lr_granted;
+ struct list_head lr_converting;
+ struct list_head lr_waiting;
+ ldlm_mode_t lr_most_restr;
+ __u32 lr_type; /* PLAIN, EXTENT, or MDSINTENT */
+ struct ldlm_resource *lr_root;
+ __u64 lr_name[RES_NAME_SIZE];
+ __u32 lr_version[RES_VERSION_SIZE];
+ atomic_t lr_refcount;
+ void *lr_tmp;
};
+static inline struct ldlm_extent *ldlm_res2extent(struct ldlm_resource *res)
+{
+ return (struct ldlm_extent *)(res->lr_name);
+}
+
extern struct obd_ops ldlm_obd_ops;
+#define LDLM_DEBUG(lock, format, a...) \
+do { \
+ CDEBUG(D_DLMTRACE, "### " format \
+ " (%s: lock %p mode %d/%d on res %Lu (rc %d) " \
+ " type %d remote %Lx)\n" , ## a, \
+ lock->l_resource->lr_namespace->ns_name, lock, \
+ lock->l_granted_mode, lock->l_req_mode, \
+ lock->l_resource->lr_name[0], \
+ atomic_read(&lock->l_resource->lr_refcount), \
+ lock->l_resource->lr_type, \
+ lock->l_remote_handle.addr); \
+} while (0)
+
+#define LDLM_DEBUG_NOLOCK(format, a...) \
+ CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
+
+/* ldlm_extent.c */
+int ldlm_extent_compat(struct ldlm_lock *, struct ldlm_lock *);
+int ldlm_extent_policy(struct ldlm_lock *, void *, ldlm_mode_t, void *);
+
+/* ldlm_lock.c */
+void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
+struct ldlm_lock *ldlm_handle2lock(struct lustre_handle *handle);
+void ldlm_lock2handle(struct ldlm_lock *lock, struct lustre_handle *lockh);
+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 ldlm_lock *lock, __u32 mode);
+void ldlm_lock_decref(struct ldlm_lock *lock, __u32 mode);
+void ldlm_grant_lock(struct ldlm_lock *lock);
+int ldlm_lock_match(struct ldlm_namespace *ns, __u64 *res_id, __u32 type,
+ void *cookie, int cookielen, ldlm_mode_t mode,
+ struct lustre_handle *lockh);
+struct ldlm_lock *
+ldlm_lock_create(struct ldlm_namespace *ns,
+ struct lustre_handle *parent_lock_handle,
+ __u64 *res_id, __u32 type, ldlm_mode_t mode, void *data,
+ __u32 data_len);
+ldlm_error_t ldlm_lock_enqueue(struct ldlm_lock *lock, void *cookie,
+ int cookie_len, int *flags,
+ ldlm_lock_callback completion,
+ ldlm_lock_callback blocking);
+struct ldlm_resource *ldlm_convert(struct ldlm_lock *lock, int new_mode,
+ int *flags);
+void ldlm_lock_cancel(struct ldlm_lock *lock);
+void ldlm_reprocess_all(struct ldlm_resource *res);
+void ldlm_lock_dump(struct ldlm_lock *lock);
+
+/* ldlm_test.c */
+int ldlm_test(struct obd_device *device, struct ptlrpc_connection *conn);
+
+/* resource.c */
+struct ldlm_namespace *ldlm_namespace_new(char *name, __u32 local);
+int ldlm_namespace_free(struct ldlm_namespace *ns);
+
+/* resource.c - internal */
+struct ldlm_resource *ldlm_resource_get(struct ldlm_namespace *ns,
+ struct ldlm_resource *parent,
+ __u64 *name, __u32 type, int create);
+struct ldlm_resource *ldlm_resource_getref(struct ldlm_resource *res);
+int ldlm_resource_put(struct ldlm_resource *res);
+void ldlm_resource_add_lock(struct ldlm_resource *res, struct list_head *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);
+void ldlm_resource_dump(struct ldlm_resource *res);
+int ldlm_lock_change_resource(struct ldlm_lock *lock, __u64 new_resid[3]);
+
+/* ldlm_request.c */
+int ldlm_cli_enqueue(struct ptlrpc_client *cl,
+ struct ptlrpc_connection *peer,
+ struct ptlrpc_request *req,
+ struct ldlm_namespace *ns,
+ struct lustre_handle *parent_lock_handle,
+ __u64 *res_id,
+ __u32 type,
+ void *cookie, int cookielen,
+ ldlm_mode_t mode,
+ int *flags,
+ ldlm_lock_callback callback,
+ void *data,
+ __u32 data_len,
+ struct lustre_handle *lockh);
+int ldlm_cli_callback(struct lustre_handle *lockh, struct ldlm_lock_desc *new,
+ void *data, __u32 data_len, struct ptlrpc_request **reqp);
+int ldlm_cli_convert(struct ptlrpc_client *, struct lustre_handle *,
+ int new_mode, int *flags);
+int ldlm_cli_cancel(struct lustre_handle *);
+
+#endif /* __KERNEL__ */
+
+/* ioctls for trying requests */
+#define IOC_LDLM_TYPE 'f'
+#define IOC_LDLM_MIN_NR 40
+
+#define IOC_LDLM_TEST _IOWR('f', 40, long)
+#define IOC_LDLM_MAX_NR 41
+
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff