Initial pass at a file API getf/releasef hooks

git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@50 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c

include/sys/file.h

@@ -1,4 +1,34 @@
 #ifndef _SPL_FILE_H
 #define _SPL_FILE_H
 
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+#include <linux/module.h>
+#include <linux/file.h>
+#include <sys/kmem.h>
+#include <sys/mutex.h>
+#include <sys/vnode.h>
+
+typedef struct spl_file {
+	int			f_fd;	   /* linux fd for lookup */
+	struct file		*f_file;   /* linux file struct */
+	atomic_t		f_ref;	   /* ref count */
+	kmutex_t		f_lock;    /* struct lock */
+	loff_t			f_offset;  /* offset */
+	vnode_t			*f_vnode;  /* vnode */
+        struct list_head	f_list;	   /* list of referenced file_t's */
+} file_t;
+
+extern file_t *getf(int fd);
+extern void releasef(int fd);
+
+int file_init(void);
+void file_fini(void);
+
+#ifdef  __cplusplus
+}
+#endif
+
 #endif /* SPL_FILE_H */

include/sys/kmem.h

@@ -204,6 +204,9 @@ extern __kmem_cache_destroy(kmem_cache_t *cache);
 void
 extern __kmem_reap(void);
 
+int kmem_init(void);
+void kmem_fini(void);
+
 #define kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags) \
         __kmem_cache_create(name,size,align,ctor,dtor,rclm,priv,vmp,flags)
 #define kmem_cache_destroy(cache)       __kmem_cache_destroy(cache)

include/sys/types.h

@@ -31,5 +31,7 @@ typedef longlong_t			diskaddr_t;
 typedef ushort_t			o_mode_t;
 typedef uint_t				major_t;
 typedef uint_t				minor_t;
+typedef uint_t				ldi_ident_t;
+typedef dev_t				dev_info_t;
 
 #endif	/* _SPL_TYPES_H */

include/sys/vnode.h

@@ -1,6 +1,10 @@
 #ifndef _SPL_VNODE_H
 #define _SPL_VNODE_H
 
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
 #include <linux/module.h>
 #include <linux/syscalls.h>
 #include <linux/fcntl.h>
@@ -30,6 +34,7 @@
 #define FRSYNC		O_RSYNC
 #define FEXCL		O_EXCL
 #define FDIRECT		O_DIRECT
+#define FAPPEND		O_APPEND
 
 #define FNODSYNC	0x10000 /* fsync pseudo flag */
 #define FNOFOLLOW	0x20000 /* don't follow symlinks */
@@ -178,4 +183,8 @@ vn_putpage(vnode_t *vp, offset_t off, ssize_t size,
 
 extern void *rootdir;
 
+#ifdef  __cplusplus
+}
+#endif
+
 #endif /* SPL_VNODE_H */