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1 | /*****************************************************************************\ | |
2 | * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC. | |
3 | * Copyright (C) 2007 The Regents of the University of California. | |
4 | * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER). | |
5 | * Written by Brian Behlendorf <behlendorf1@llnl.gov>. | |
6 | * UCRL-CODE-235197 | |
7 | * | |
8 | * This file is part of the SPL, Solaris Porting Layer. | |
9 | * For details, see <http://zfsonlinux.org/>. | |
10 | * | |
11 | * The SPL is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | * The SPL is distributed in the hope that it will be useful, but WITHOUT | |
17 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
18 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
19 | * for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License along | |
22 | * with the SPL. If not, see <http://www.gnu.org/licenses/>. | |
23 | \*****************************************************************************/ | |
24 | ||
25 | #ifndef _SPL_VNODE_H | |
26 | #define _SPL_VNODE_H | |
27 | ||
28 | #include <linux/module.h> | |
29 | #include <linux/syscalls.h> | |
30 | #include <linux/fcntl.h> | |
31 | #include <linux/buffer_head.h> | |
32 | #include <linux/dcache.h> | |
33 | #include <linux/namei.h> | |
34 | #include <linux/file.h> | |
35 | #include <linux/fs.h> | |
36 | #include <linux/fs_struct.h> | |
37 | #include <linux/mount.h> | |
38 | #include <sys/kmem.h> | |
39 | #include <sys/mutex.h> | |
40 | #include <sys/types.h> | |
41 | #include <sys/time.h> | |
42 | #include <sys/uio.h> | |
43 | #include <sys/sunldi.h> | |
44 | ||
45 | /* | |
46 | * Prior to linux-2.6.33 only O_DSYNC semantics were implemented and | |
47 | * they used the O_SYNC flag. As of linux-2.6.33 the this behavior | |
48 | * was properly split in to O_SYNC and O_DSYNC respectively. | |
49 | */ | |
50 | #ifndef O_DSYNC | |
51 | #define O_DSYNC O_SYNC | |
52 | #endif | |
53 | ||
54 | #define FREAD 1 | |
55 | #define FWRITE 2 | |
56 | #define FCREAT O_CREAT | |
57 | #define FTRUNC O_TRUNC | |
58 | #define FOFFMAX O_LARGEFILE | |
59 | #define FSYNC O_SYNC | |
60 | #define FDSYNC O_DSYNC | |
61 | #define FRSYNC O_SYNC | |
62 | #define FEXCL O_EXCL | |
63 | #define FDIRECT O_DIRECT | |
64 | #define FAPPEND O_APPEND | |
65 | ||
66 | #define FNODSYNC 0x10000 /* fsync pseudo flag */ | |
67 | #define FNOFOLLOW 0x20000 /* don't follow symlinks */ | |
68 | ||
69 | #define F_FREESP 11 /* Free file space */ | |
70 | ||
71 | ||
72 | /* | |
73 | * The vnode AT_ flags are mapped to the Linux ATTR_* flags. | |
74 | * This allows them to be used safely with an iattr structure. | |
75 | * The AT_XVATTR flag has been added and mapped to the upper | |
76 | * bit range to avoid conflicting with the standard Linux set. | |
77 | */ | |
78 | #undef AT_UID | |
79 | #undef AT_GID | |
80 | ||
81 | #define AT_MODE ATTR_MODE | |
82 | #define AT_UID ATTR_UID | |
83 | #define AT_GID ATTR_GID | |
84 | #define AT_SIZE ATTR_SIZE | |
85 | #define AT_ATIME ATTR_ATIME | |
86 | #define AT_MTIME ATTR_MTIME | |
87 | #define AT_CTIME ATTR_CTIME | |
88 | ||
89 | #define ATTR_XVATTR (1 << 31) | |
90 | #define AT_XVATTR ATTR_XVATTR | |
91 | ||
92 | #define ATTR_IATTR_MASK (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_SIZE | \ | |
93 | ATTR_ATIME | ATTR_MTIME | ATTR_CTIME | ATTR_FILE) | |
94 | ||
95 | #define CRCREAT 0x01 | |
96 | #define RMFILE 0x02 | |
97 | ||
98 | #define B_INVAL 0x01 | |
99 | #define B_TRUNC 0x02 | |
100 | ||
101 | #define LOOKUP_DIR 0x01 | |
102 | #define LOOKUP_XATTR 0x02 | |
103 | #define CREATE_XATTR_DIR 0x04 | |
104 | #define ATTR_NOACLCHECK 0x20 | |
105 | ||
106 | typedef enum vtype { | |
107 | VNON = 0, | |
108 | VREG = 1, | |
109 | VDIR = 2, | |
110 | VBLK = 3, | |
111 | VCHR = 4, | |
112 | VLNK = 5, | |
113 | VFIFO = 6, | |
114 | VDOOR = 7, | |
115 | VPROC = 8, | |
116 | VSOCK = 9, | |
117 | VPORT = 10, | |
118 | VBAD = 11 | |
119 | } vtype_t; | |
120 | ||
121 | typedef struct vattr { | |
122 | enum vtype va_type; /* vnode type */ | |
123 | u_int va_mask; /* attribute bit-mask */ | |
124 | u_short va_mode; /* acc mode */ | |
125 | uid_t va_uid; /* owner uid */ | |
126 | gid_t va_gid; /* owner gid */ | |
127 | long va_fsid; /* fs id */ | |
128 | long va_nodeid; /* node # */ | |
129 | uint32_t va_nlink; /* # links */ | |
130 | uint64_t va_size; /* file size */ | |
131 | struct timespec va_atime; /* last acc */ | |
132 | struct timespec va_mtime; /* last mod */ | |
133 | struct timespec va_ctime; /* last chg */ | |
134 | dev_t va_rdev; /* dev */ | |
135 | uint64_t va_nblocks; /* space used */ | |
136 | uint32_t va_blksize; /* block size */ | |
137 | uint32_t va_seq; /* sequence */ | |
138 | struct dentry *va_dentry; /* dentry to wire */ | |
139 | } vattr_t; | |
140 | ||
141 | typedef struct vnode { | |
142 | struct file *v_file; | |
143 | kmutex_t v_lock; /* protects vnode fields */ | |
144 | uint_t v_flag; /* vnode flags (see below) */ | |
145 | uint_t v_count; /* reference count */ | |
146 | void *v_data; /* private data for fs */ | |
147 | struct vfs *v_vfsp; /* ptr to containing VFS */ | |
148 | struct stdata *v_stream; /* associated stream */ | |
149 | enum vtype v_type; /* vnode type */ | |
150 | dev_t v_rdev; /* device (VCHR, VBLK) */ | |
151 | gfp_t v_gfp_mask; /* original mapping gfp mask */ | |
152 | } vnode_t; | |
153 | ||
154 | typedef struct vn_file { | |
155 | int f_fd; /* linux fd for lookup */ | |
156 | struct task_struct *f_task; /* linux task this fd belongs to */ | |
157 | struct file *f_file; /* linux file struct */ | |
158 | atomic_t f_ref; /* ref count */ | |
159 | kmutex_t f_lock; /* struct lock */ | |
160 | loff_t f_offset; /* offset */ | |
161 | vnode_t *f_vnode; /* vnode */ | |
162 | struct list_head f_list; /* list referenced file_t's */ | |
163 | } file_t; | |
164 | ||
165 | extern vnode_t *vn_alloc(int flag); | |
166 | void vn_free(vnode_t *vp); | |
167 | extern vtype_t vn_mode_to_vtype(mode_t); | |
168 | extern mode_t vn_vtype_to_mode(vtype_t); | |
169 | extern int vn_open(const char *path, uio_seg_t seg, int flags, int mode, | |
170 | vnode_t **vpp, int x1, void *x2); | |
171 | extern int vn_openat(const char *path, uio_seg_t seg, int flags, int mode, | |
172 | vnode_t **vpp, int x1, void *x2, vnode_t *vp, int fd); | |
173 | extern int vn_rdwr(uio_rw_t uio, vnode_t *vp, void *addr, ssize_t len, | |
174 | offset_t off, uio_seg_t seg, int x1, rlim64_t x2, | |
175 | void *x3, ssize_t *residp); | |
176 | extern int vn_close(vnode_t *vp, int flags, int x1, int x2, void *x3, void *x4); | |
177 | extern int vn_seek(vnode_t *vp, offset_t o, offset_t *op, void *ct); | |
178 | ||
179 | extern int vn_remove(const char *path, uio_seg_t seg, int flags); | |
180 | extern int vn_rename(const char *path1, const char *path2, int x1); | |
181 | extern int vn_getattr(vnode_t *vp, vattr_t *vap, int flags, void *x3, void *x4); | |
182 | extern int vn_fsync(vnode_t *vp, int flags, void *x3, void *x4); | |
183 | extern int vn_space(vnode_t *vp, int cmd, struct flock *bfp, int flag, | |
184 | offset_t offset, void *x6, void *x7); | |
185 | extern file_t *vn_getf(int fd); | |
186 | extern void vn_releasef(int fd); | |
187 | extern int vn_set_pwd(const char *filename); | |
188 | ||
189 | int spl_vn_init(void); | |
190 | void spl_vn_fini(void); | |
191 | ||
192 | #define VOP_CLOSE vn_close | |
193 | #define VOP_SEEK vn_seek | |
194 | #define VOP_GETATTR vn_getattr | |
195 | #define VOP_FSYNC vn_fsync | |
196 | #define VOP_SPACE vn_space | |
197 | #define VOP_PUTPAGE(vp, o, s, f, x1, x2) ((void)0) | |
198 | #define vn_is_readonly(vp) 0 | |
199 | #define getf vn_getf | |
200 | #define releasef vn_releasef | |
201 | ||
202 | extern vnode_t *rootdir; | |
203 | ||
204 | #endif /* SPL_VNODE_H */ |