Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 273 insertions, 0 deletions

diff --git a/include/linux/sunrpc/sched.h b/include/linux/sunrpc/sched.h
new file mode 100644
index 000000000000..99d17ed7cebb
--- /dev/null
+++ b/include/linux/sunrpc/sched.h
@@ -0,0 +1,273 @@
+/*
+ * linux/include/linux/sunrpc/sched.h
+ *
+ * Scheduling primitives for kernel Sun RPC.
+ *
+ * Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef _LINUX_SUNRPC_SCHED_H_
+#define _LINUX_SUNRPC_SCHED_H_
+
+#include <linux/timer.h>
+#include <linux/sunrpc/types.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+#include <linux/workqueue.h>
+#include <linux/sunrpc/xdr.h>
+
+/*
+ * This is the actual RPC procedure call info.
+ */
+struct rpc_procinfo;
+struct rpc_message {
+        struct rpc_procinfo *   rpc_proc;       /* Procedure information */
+        void *                  rpc_argp;       /* Arguments */
+        void *                  rpc_resp;       /* Result */
+        struct rpc_cred *       rpc_cred;       /* Credentials */
+};
+
+struct rpc_wait_queue;
+struct rpc_wait {
+        struct list_head        list;           /* wait queue links */
+        struct list_head        links;          /* Links to related tasks */
+        wait_queue_head_t       waitq;          /* sync: sleep on this q */
+        struct rpc_wait_queue * rpc_waitq;      /* RPC wait queue we're on */
+};
+
+/*
+ * This is the RPC task struct
+ */
+struct rpc_task {
+#ifdef RPC_DEBUG
+        unsigned long           tk_magic;       /* 0xf00baa */
+#endif
+        struct list_head        tk_task;        /* global list of tasks */
+        struct rpc_clnt *       tk_client;      /* RPC client */
+        struct rpc_rqst *       tk_rqstp;       /* RPC request */
+        int                     tk_status;      /* result of last operation */
+
+        /*
+         * RPC call state
+         */
+        struct rpc_message      tk_msg;         /* RPC call info */
+        __u32 *                 tk_buffer;      /* XDR buffer */
+        size_t                  tk_bufsize;
+        __u8                    tk_garb_retry;
+        __u8                    tk_cred_retry;
+
+        unsigned long           tk_cookie;      /* Cookie for batching tasks */
+
+        /*
+         * timeout_fn   to be executed by timer bottom half
+         * callback     to be executed after waking up
+         * action       next procedure for async tasks
+         * exit         exit async task and report to caller
+         */
+        void                    (*tk_timeout_fn)(struct rpc_task *);
+        void                    (*tk_callback)(struct rpc_task *);
+        void                    (*tk_action)(struct rpc_task *);
+        void                    (*tk_exit)(struct rpc_task *);
+        void                    (*tk_release)(struct rpc_task *);
+        void *                  tk_calldata;
+
+        /*
+         * tk_timer is used for async processing by the RPC scheduling
+         * primitives. You should not access this directly unless
+         * you have a pathological interest in kernel oopses.
+         */
+        struct timer_list       tk_timer;       /* kernel timer */
+        unsigned long           tk_timeout;     /* timeout for rpc_sleep() */
+        unsigned short          tk_flags;       /* misc flags */
+        unsigned char           tk_active   : 1;/* Task has been activated */
+        unsigned char           tk_priority : 2;/* Task priority */
+        unsigned long           tk_runstate;    /* Task run status */
+        struct workqueue_struct *tk_workqueue;  /* Normally rpciod, but could
+                                                 * be any workqueue
+                                                 */
+        union {
+                struct work_struct      tk_work;        /* Async task work queue */
+                struct rpc_wait         tk_wait;        /* RPC wait */
+        } u;
+#ifdef RPC_DEBUG
+        unsigned short          tk_pid;         /* debugging aid */
+#endif
+};
+#define tk_auth                 tk_client->cl_auth
+#define tk_xprt                 tk_client->cl_xprt
+
+/* support walking a list of tasks on a wait queue */
+#define task_for_each(task, pos, head) \
+        list_for_each(pos, head) \
+                if ((task=list_entry(pos, struct rpc_task, u.tk_wait.list)),1)
+
+#define task_for_first(task, head) \
+        if (!list_empty(head) &&  \
+            ((task=list_entry((head)->next, struct rpc_task, u.tk_wait.list)),1))
+
+/* .. and walking list of all tasks */
+#define alltask_for_each(task, pos, head) \
+        list_for_each(pos, head) \
+                if ((task=list_entry(pos, struct rpc_task, tk_task)),1)
+
+typedef void                    (*rpc_action)(struct rpc_task *);
+
+/*
+ * RPC task flags
+ */
+#define RPC_TASK_ASYNC          0x0001          /* is an async task */
+#define RPC_TASK_SWAPPER        0x0002          /* is swapping in/out */
+#define RPC_TASK_CHILD          0x0008          /* is child of other task */
+#define RPC_CALL_MAJORSEEN      0x0020          /* major timeout seen */
+#define RPC_TASK_ROOTCREDS      0x0040          /* force root creds */
+#define RPC_TASK_DYNAMIC        0x0080          /* task was kmalloc'ed */
+#define RPC_TASK_KILLED         0x0100          /* task was killed */
+#define RPC_TASK_SOFT           0x0200          /* Use soft timeouts */
+#define RPC_TASK_NOINTR         0x0400          /* uninterruptible task */
+
+#define RPC_IS_ASYNC(t)         ((t)->tk_flags & RPC_TASK_ASYNC)
+#define RPC_IS_CHILD(t)         ((t)->tk_flags & RPC_TASK_CHILD)
+#define RPC_IS_SWAPPER(t)       ((t)->tk_flags & RPC_TASK_SWAPPER)
+#define RPC_DO_ROOTOVERRIDE(t)  ((t)->tk_flags & RPC_TASK_ROOTCREDS)
+#define RPC_ASSASSINATED(t)     ((t)->tk_flags & RPC_TASK_KILLED)
+#define RPC_IS_ACTIVATED(t)     ((t)->tk_active)
+#define RPC_DO_CALLBACK(t)      ((t)->tk_callback != NULL)
+#define RPC_IS_SOFT(t)          ((t)->tk_flags & RPC_TASK_SOFT)
+#define RPC_TASK_UNINTERRUPTIBLE(t) ((t)->tk_flags & RPC_TASK_NOINTR)
+
+#define RPC_TASK_RUNNING        0
+#define RPC_TASK_QUEUED         1
+#define RPC_TASK_WAKEUP         2
+#define RPC_TASK_HAS_TIMER      3
+
+#define RPC_IS_RUNNING(t)       (test_bit(RPC_TASK_RUNNING, &(t)->tk_runstate))
+#define rpc_set_running(t)      (set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate))
+#define rpc_test_and_set_running(t) \
+                                (test_and_set_bit(RPC_TASK_RUNNING, &(t)->tk_runstate))
+#define rpc_clear_running(t)    \
+        do { \
+                smp_mb__before_clear_bit(); \
+                clear_bit(RPC_TASK_RUNNING, &(t)->tk_runstate); \
+                smp_mb__after_clear_bit(); \
+        } while (0)
+
+#define RPC_IS_QUEUED(t)        (test_bit(RPC_TASK_QUEUED, &(t)->tk_runstate))
+#define rpc_set_queued(t)       (set_bit(RPC_TASK_QUEUED, &(t)->tk_runstate))
+#define rpc_clear_queued(t)     \
+        do { \
+                smp_mb__before_clear_bit(); \
+                clear_bit(RPC_TASK_QUEUED, &(t)->tk_runstate); \
+                smp_mb__after_clear_bit(); \
+        } while (0)
+
+#define rpc_start_wakeup(t) \
+        (test_and_set_bit(RPC_TASK_WAKEUP, &(t)->tk_runstate) == 0)
+#define rpc_finish_wakeup(t) \
+        do { \
+                smp_mb__before_clear_bit(); \
+                clear_bit(RPC_TASK_WAKEUP, &(t)->tk_runstate); \
+                smp_mb__after_clear_bit(); \
+        } while (0)
+
+/*
+ * Task priorities.
+ * Note: if you change these, you must also change
+ * the task initialization definitions below.
+ */
+#define RPC_PRIORITY_LOW        0
+#define RPC_PRIORITY_NORMAL     1
+#define RPC_PRIORITY_HIGH       2
+#define RPC_NR_PRIORITY         (RPC_PRIORITY_HIGH+1)
+
+/*
+ * RPC synchronization objects
+ */
+struct rpc_wait_queue {
+        spinlock_t              lock;
+        struct list_head        tasks[RPC_NR_PRIORITY]; /* task queue for each priority level */
+        unsigned long           cookie;                 /* cookie of last task serviced */
+        unsigned char           maxpriority;            /* maximum priority (0 if queue is not a priority queue) */
+        unsigned char           priority;               /* current priority */
+        unsigned char           count;                  /* # task groups remaining serviced so far */
+        unsigned char           nr;                     /* # tasks remaining for cookie */
+#ifdef RPC_DEBUG
+        const char *            name;
+#endif
+};
+
+/*
+ * This is the # requests to send consecutively
+ * from a single cookie.  The aim is to improve
+ * performance of NFS operations such as read/write.
+ */
+#define RPC_BATCH_COUNT                 16
+
+#ifndef RPC_DEBUG
+# define RPC_WAITQ_INIT(var,qname) { \
+                .lock = SPIN_LOCK_UNLOCKED, \
+                .tasks = { \
+                        [0] = LIST_HEAD_INIT(var.tasks[0]), \
+                        [1] = LIST_HEAD_INIT(var.tasks[1]), \
+                        [2] = LIST_HEAD_INIT(var.tasks[2]), \
+                }, \
+        }
+#else
+# define RPC_WAITQ_INIT(var,qname) { \
+                .lock = SPIN_LOCK_UNLOCKED, \
+                .tasks = { \
+                        [0] = LIST_HEAD_INIT(var.tasks[0]), \
+                        [1] = LIST_HEAD_INIT(var.tasks[1]), \
+                        [2] = LIST_HEAD_INIT(var.tasks[2]), \
+                }, \
+                .name = qname, \
+        }
+#endif
+# define RPC_WAITQ(var,qname)      struct rpc_wait_queue var = RPC_WAITQ_INIT(var,qname)
+
+#define RPC_IS_PRIORITY(q)              ((q)->maxpriority > 0)
+
+/*
+ * Function prototypes
+ */
+struct rpc_task *rpc_new_task(struct rpc_clnt *, rpc_action, int flags);
+struct rpc_task *rpc_new_child(struct rpc_clnt *, struct rpc_task *parent);
+void            rpc_init_task(struct rpc_task *, struct rpc_clnt *,
+                                        rpc_action exitfunc, int flags);
+void            rpc_release_task(struct rpc_task *);
+void            rpc_killall_tasks(struct rpc_clnt *);
+int             rpc_execute(struct rpc_task *);
+void            rpc_run_child(struct rpc_task *parent, struct rpc_task *child,
+                                        rpc_action action);
+void            rpc_init_priority_wait_queue(struct rpc_wait_queue *, const char *);
+void            rpc_init_wait_queue(struct rpc_wait_queue *, const char *);
+void            rpc_sleep_on(struct rpc_wait_queue *, struct rpc_task *,
+                                        rpc_action action, rpc_action timer);
+void            rpc_wake_up_task(struct rpc_task *);
+void            rpc_wake_up(struct rpc_wait_queue *);
+struct rpc_task *rpc_wake_up_next(struct rpc_wait_queue *);
+void            rpc_wake_up_status(struct rpc_wait_queue *, int);
+void            rpc_delay(struct rpc_task *, unsigned long);
+void *          rpc_malloc(struct rpc_task *, size_t);
+int             rpciod_up(void);
+void            rpciod_down(void);
+void            rpciod_wake_up(void);
+#ifdef RPC_DEBUG
+void            rpc_show_tasks(void);
+#endif
+int             rpc_init_mempool(void);
+void            rpc_destroy_mempool(void);
+
+static inline void rpc_exit(struct rpc_task *task, int status)
+{
+        task->tk_status = status;
+        task->tk_action = NULL;
+}
+
+#ifdef RPC_DEBUG
+static inline const char * rpc_qname(struct rpc_wait_queue *q)
+{
+        return ((q && q->name) ? q->name : "unknown");
+}
+#endif
+
+#endif /* _LINUX_SUNRPC_SCHED_H_ */