aboutsummaryrefslogtreecommitdiffstats
path: root/include/sys/vnode.h
blob: 03462bd7091a7a4b196bb69e31abe24778783798 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
/*****************************************************************************\
 *  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 <behlendorf1@llnl.gov>.
 *  UCRL-CODE-235197
 *
 *  This file is part of the SPL, Solaris Porting Layer.
 *  For details, see <http://github.com/behlendorf/spl/>.
 *
 *  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_VNODE_H
#define _SPL_VNODE_H

#include <linux/module.h>
#include <linux/syscalls.h>
#include <linux/fcntl.h>
#include <linux/buffer_head.h>
#include <linux/dcache.h>
#include <linux/namei.h>
#include <linux/file.h>
#include <linux/fs.h>
#include <linux/fs_struct.h>
#include <linux/mount.h>
#include <sys/kmem.h>
#include <sys/mutex.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/sunldi.h>

/*
 * Prior to linux-2.6.33 only O_DSYNC semantics were implemented and
 * they used the O_SYNC flag.  As of linux-2.6.33 the this behavior
 * was properly split in to O_SYNC and O_DSYNC respectively.
 */
#ifndef O_DSYNC
#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 FRSYNC		O_SYNC
#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 */

/*
 * The vnode AT_ flags are mapped to the Linux ATTR_* flags.
 * This allows them to be used safely with an iattr structure.
 * The AT_XVATTR flag has been added and mapped to the upper
 * bit range to avoid conflicting with the standard Linux set.
 */
#undef AT_UID
#undef AT_GID

#define AT_MODE		ATTR_MODE
#define AT_UID		ATTR_UID
#define AT_GID		ATTR_GID
#define AT_SIZE		ATTR_SIZE
#define AT_ATIME	ATTR_ATIME
#define AT_MTIME	ATTR_MTIME
#define AT_CTIME	ATTR_CTIME

#define ATTR_XVATTR	(1 << 31)
#define AT_XVATTR	ATTR_XVATTR

#define ATTR_IATTR_MASK	(ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_SIZE | \
			ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_FILE)

#define CRCREAT		0x01
#define RMFILE		0x02

#define B_INVAL		0x01
#define B_TRUNC		0x02

#define LOOKUP_DIR		0x01
#define LOOKUP_XATTR		0x02
#define CREATE_XATTR_DIR	0x04
#define ATTR_NOACLCHECK		0x20

#ifdef HAVE_PATH_IN_NAMEIDATA
# define nd_dentry	path.dentry
# define nd_mnt		path.mnt
#else
# define nd_dentry	dentry
# define nd_mnt		mnt
#endif

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 */
	u_int		va_mask;	/* attribute bit-mask */
	u_short		va_mode;	/* acc mode */
	uid_t		va_uid;		/* owner uid */
	gid_t		va_gid;		/* owner gid */
	long		va_fsid;	/* fs id */
	long		va_nodeid;	/* node # */
	uint32_t	va_nlink;	/* # links */
	uint64_t	va_size;	/* file size */
	struct timespec	va_atime;	/* last acc */
	struct timespec	va_mtime;	/* last mod */
	struct timespec	va_ctime;	/* last chg */
	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_remove(const char *path, uio_seg_t seg, int flags);
extern int vn_rename(const char *path1, const char *path2, int x1);
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 file_t *vn_getf(int fd);
extern void vn_releasef(int fd);
extern int vn_set_pwd(const char *filename);

int spl_vn_init_kallsyms_lookup(void);
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_PUTPAGE(vp, o, s, f, x1, x2)	((void)0)
#define vn_is_readonly(vp)			0
#define getf					vn_getf
#define releasef				vn_releasef

extern vnode_t *rootdir;

#endif /* SPL_VNODE_H */