patch-2.4.15 linux/include/linux/intermezzo_psdev.h

• Lines: 73
• Date: Sun Nov 11 10:20:21 2001
• Orig file: v2.4.14/linux/include/linux/intermezzo_psdev.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.14/linux/include/linux/intermezzo_psdev.h linux/include/linux/intermezzo_psdev.h
@@ -0,0 +1,72 @@
+#ifndef __PRESTO_PSDEV_H
+#define __PRESTO_PSDEV_H
+
+#ifdef PRESTO_DEVEL
+# define PRESTO_FS_NAME "izofs"
+# define PRESTO_PSDEV_NAME "/dev/izo"
+# define PRESTO_PSDEV_MAJOR 186
+#else
+# define PRESTO_FS_NAME "InterMezzo"
+# define PRESTO_PSDEV_NAME "/dev/intermezzo"
+# define PRESTO_PSDEV_MAJOR 185
+#endif
+
+#define MAX_PRESTODEV 16
+
+#include <linux/version.h>
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,3,0))
+#define wait_queue_head_t  struct wait_queue *
+#define DECLARE_WAITQUEUE(name,task) \
+        struct wait_queue name = { task, NULL }
+#define init_waitqueue_head(arg) 
+#else
+#ifndef __initfunc
+#define __initfunc(arg) arg
+#endif
+#endif
+
+
+/* represents state of a /dev/presto */
+/* communication pending & processing queues */
+struct upc_comm {
+        unsigned int         uc_seq;
+        wait_queue_head_t    uc_waitq;     /* Lento wait queue */
+        struct list_head    uc_pending;
+        struct list_head    uc_processing;
+        int                  uc_pid;       /* Lento's pid */
+        int                  uc_hard; /* allows signals during upcalls */
+        int                  uc_no_filter;
+        int                  uc_no_journal;
+        int                  uc_no_upcall;
+        int                  uc_timeout; /* . sec: signals will dequeue upc */
+        long                 uc_errorval; /* for testing I/O failures */
+        struct list_head     uc_cache_list;
+        int                   uc_minor;
+        char *                uc_devname;
+};
+
+#define ISLENTO(minor) (current->pid == upc_comms[minor].uc_pid \
+                || current->p_pptr->pid == upc_comms[minor].uc_pid)
+
+extern struct upc_comm upc_comms[MAX_PRESTODEV];
+
+/* messages between presto filesystem in kernel and Venus */
+#define REQ_READ   1
+#define REQ_WRITE  2
+#define REQ_ASYNC  4
+#define REQ_DEAD   8
+
+struct upc_req {
+        struct list_head   rq_chain;
+        caddr_t            rq_data;
+        u_short            rq_flags;
+        u_short            rq_bufsize;
+        u_short            rq_rep_size;
+        u_short            rq_opcode;  /* copied from data to save lookup */
+        int                rq_unique;
+        wait_queue_head_t  rq_sleep;   /* process' wait queue */
+        unsigned long      rq_posttime;
+};
+
+#endif