Add zfs_file_* interface, remove vnodes

Provide a common zfs_file_* interface which can be implemented on all 
platforms to perform normal file access from either the kernel module
or the libzpool library.

This allows all non-portable vnode_t usage in the common code to be 
replaced by the new portable zfs_file_t.  The associated vnode and
kobj compatibility functions, types, and macros have been removed
from the SPL.  Moving forward, vnodes should only be used in platform
specific code when provided by the native operating system.

Reviewed-by: Sean Eric Fagan <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Reviewed-by: Igor Kozhukhov <[email protected]>
Reviewed-by: Jorgen Lundman <[email protected]>
Signed-off-by: Matt Macy <[email protected]>
Closes #9556 

4 files changed, 0 insertions, 171 deletions

diff --git a/include/os/linux/spl/sys/Makefile.am b/include/os/linux/spl/sys/Makefile.am
index e3df4edae..63b5ba71b 100644
--- a/include/os/linux/spl/sys/Makefile.am
+++ b/include/os/linux/spl/sys/Makefile.am
@@ -19,11 +19,9 @@ KERNEL_H = \
 	$(top_srcdir)/include/os/linux/spl/sys/isa_defs.h \
 	$(top_srcdir)/include/os/linux/spl/sys/kmem_cache.h \
 	$(top_srcdir)/include/os/linux/spl/sys/kmem.h \
-	$(top_srcdir)/include/os/linux/spl/sys/kobj.h \
 	$(top_srcdir)/include/os/linux/spl/sys/kstat.h \
 	$(top_srcdir)/include/os/linux/spl/sys/list.h \
 	$(top_srcdir)/include/os/linux/spl/sys/mod_os.h \
-	$(top_srcdir)/include/os/linux/spl/sys/mode.h \
 	$(top_srcdir)/include/os/linux/spl/sys/mutex.h \
 	$(top_srcdir)/include/os/linux/spl/sys/param.h \
 	$(top_srcdir)/include/os/linux/spl/sys/processor.h \
diff --git a/include/os/linux/spl/sys/kobj.h b/include/os/linux/spl/sys/kobj.h
deleted file mode 100644
index 558ec39a8..000000000
--- a/include/os/linux/spl/sys/kobj.h
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
- *  Copyright (C) 2007 The Regents of the University of California.
- *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
- *  Written by Brian Behlendorf <[email protected]>.
- *  UCRL-CODE-235197
- *
- *  This file is part of the SPL, Solaris Porting Layer.
- *  For details, see <http://zfsonlinux.org/>.
- *
- *  The SPL is free software; you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License as published by the
- *  Free Software Foundation; either version 2 of the License, or (at your
- *  option) any later version.
- *
- *  The SPL is distributed in the hope that it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- *  for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef _SPL_KOBJ_H
-#define	_SPL_KOBJ_H
-
-#include <sys/vnode.h>
-
-typedef struct _buf {
-	vnode_t *vp;
-} _buf_t;
-
-typedef struct _buf buf_t;
-
-extern struct _buf *kobj_open_file(const char *name);
-extern void kobj_close_file(struct _buf *file);
-extern int kobj_read_file(struct _buf *file, char *buf, unsigned size,
-    unsigned off);
-extern int kobj_get_filesize(struct _buf *file, uint64_t *size);
-
-#endif /* SPL_KOBJ_H */
diff --git a/include/os/linux/spl/sys/mode.h b/include/os/linux/spl/sys/mode.h
deleted file mode 100644
index 02802d0d4..000000000
--- a/include/os/linux/spl/sys/mode.h
+++ /dev/null
@@ -1,32 +0,0 @@
-/*
- *  Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
- *  Copyright (C) 2007 The Regents of the University of California.
- *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
- *  Written by Brian Behlendorf <[email protected]>.
- *  UCRL-CODE-235197
- *
- *  This file is part of the SPL, Solaris Porting Layer.
- *  For details, see <http://zfsonlinux.org/>.
- *
- *  The SPL is free software; you can redistribute it and/or modify it
- *  under the terms of the GNU General Public License as published by the
- *  Free Software Foundation; either version 2 of the License, or (at your
- *  option) any later version.
- *
- *  The SPL is distributed in the hope that it will be useful, but WITHOUT
- *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- *  for more details.
- *
- *  You should have received a copy of the GNU General Public License along
- *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#ifndef _SPL_MODE_H
-#define	_SPL_MODE_H
-
-#define	IFTOVT(mode)	vn_mode_to_vtype(mode)
-#define	VTTOIF(vtype)	vn_vtype_to_mode(vtype)
-#define	MAKEIMODE(T, M) (VTTOIF(T) | ((M) & ~S_IFMT))
-
-#endif /* SPL_MODE_H */
diff --git a/include/os/linux/spl/sys/vnode.h b/include/os/linux/spl/sys/vnode.h
index 7bd278e4e..07eac8e44 100644
--- a/include/os/linux/spl/sys/vnode.h
+++ b/include/os/linux/spl/sys/vnode.h
@@ -51,23 +51,8 @@
 #define	O_DSYNC		O_SYNC
 #endif
 
-#define	FREAD		1
-#define	FWRITE		2
-#define	FCREAT		O_CREAT
-#define	FTRUNC		O_TRUNC
-#define	FOFFMAX		O_LARGEFILE
-#define	FSYNC		O_SYNC
-#define	FDSYNC		O_DSYNC
-#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 */
-
 #define	F_FREESP	11 	/* Free file space */
 
-
 /*
  * The vnode AT_ flags are mapped to the Linux ATTR_* flags.
  * This allows them to be used safely with an iattr structure.
@@ -102,23 +87,7 @@
 #define	CREATE_XATTR_DIR	0x04
 #define	ATTR_NOACLCHECK		0x20
 
-typedef enum vtype {
-	VNON		= 0,
-	VREG		= 1,
-	VDIR		= 2,
-	VBLK		= 3,
-	VCHR		= 4,
-	VLNK		= 5,
-	VFIFO		= 6,
-	VDOOR		= 7,
-	VPROC		= 8,
-	VSOCK		= 9,
-	VPORT		= 10,
-	VBAD		= 11
-} vtype_t;
-
 typedef struct vattr {
-	enum vtype	va_type;	/* vnode type */
 	uint32_t	va_mask;	/* attribute bit-mask */
 	ushort_t	va_mode;	/* acc mode */
 	uid_t		va_uid;		/* owner uid */
@@ -133,70 +102,6 @@ typedef struct vattr {
 	dev_t		va_rdev;	/* dev */
 	uint64_t	va_nblocks;	/* space used */
 	uint32_t	va_blksize;	/* block size */
-	uint32_t	va_seq;		/* sequence */
 	struct dentry	*va_dentry;	/* dentry to wire */
 } vattr_t;
-
-typedef struct vnode {
-	struct file	*v_file;
-	kmutex_t	v_lock;		/* protects vnode fields */
-	uint_t		v_flag;		/* vnode flags (see below) */
-	uint_t		v_count;	/* reference count */
-	void		*v_data;	/* private data for fs */
-	struct vfs	*v_vfsp;	/* ptr to containing VFS */
-	struct stdata	*v_stream;	/* associated stream */
-	enum vtype	v_type;		/* vnode type */
-	dev_t		v_rdev;		/* device (VCHR, VBLK) */
-	gfp_t		v_gfp_mask;	/* original mapping gfp mask */
-} vnode_t;
-
-typedef struct vn_file {
-	int		f_fd;		/* linux fd for lookup */
-	struct task_struct *f_task;	/* linux task this fd belongs to */
-	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 referenced file_t's */
-} file_t;
-
-extern vnode_t *vn_alloc(int flag);
-void vn_free(vnode_t *vp);
-extern vtype_t vn_mode_to_vtype(mode_t);
-extern mode_t vn_vtype_to_mode(vtype_t);
-extern int vn_open(const char *path, uio_seg_t seg, int flags, int mode,
-    vnode_t **vpp, int x1, void *x2);
-extern int vn_openat(const char *path, uio_seg_t seg, int flags, int mode,
-    vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd);
-extern int vn_rdwr(uio_rw_t uio, vnode_t *vp, void *addr, ssize_t len,
-    offset_t off, uio_seg_t seg, int x1, rlim64_t x2,
-    void *x3, ssize_t *residp);
-extern int vn_close(vnode_t *vp, int flags, int x1, int x2, void *x3, void *x4);
-extern int vn_seek(vnode_t *vp, offset_t o, offset_t *op, void *ct);
-
-extern int vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4);
-extern int vn_fsync(vnode_t *vp, int flags, void *x3, void *x4);
-extern int vn_space(vnode_t *vp, int cmd, struct flock *bfp, int flag,
-    offset_t offset, void *x6, void *x7);
-extern file_t *vn_getf(int fd);
-extern void vn_releasef(int fd);
-extern void vn_areleasef(int fd, uf_info_t *fip);
-
-int spl_vn_init(void);
-void spl_vn_fini(void);
-
-#define	VOP_CLOSE				vn_close
-#define	VOP_SEEK				vn_seek
-#define	VOP_GETATTR				vn_getattr
-#define	VOP_FSYNC				vn_fsync
-#define	VOP_SPACE				vn_space
-#define	VOP_PUTPAGE(vp, o, s, f, x1, x2)	((void)0)
-#define	vn_is_readonly(vp)			0
-#define	getf					vn_getf
-#define	releasef				vn_releasef
-#define	areleasef				vn_areleasef
-
-extern vnode_t *rootdir;
-
 #endif /* SPL_VNODE_H */