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TOMOYO Linux Cross Reference
Linux/fs/freevxfs/vxfs.h

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  1 /*
  2  * Copyright (c) 2000-2001 Christoph Hellwig.
  3  * All rights reserved.
  4  *
  5  * Redistribution and use in source and binary forms, with or without
  6  * modification, are permitted provided that the following conditions
  7  * are met:
  8  * 1. Redistributions of source code must retain the above copyright
  9  *    notice, this list of conditions, and the following disclaimer,
 10  *    without modification.
 11  * 2. The name of the author may not be used to endorse or promote products
 12  *    derived from this software without specific prior written permission.
 13  *
 14  * Alternatively, this software may be distributed under the terms of the
 15  * GNU General Public License ("GPL").
 16  *
 17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
 21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 27  * SUCH DAMAGE.
 28  *
 29  */
 30 #ifndef _VXFS_SUPER_H_
 31 #define _VXFS_SUPER_H_
 32 
 33 /*
 34  * Veritas filesystem driver - superblock structure.
 35  *
 36  * This file contains the definition of the disk and core
 37  * superblocks of the Veritas Filesystem.
 38  */
 39 #include <linux/types.h>
 40 
 41 
 42 /*
 43  * Data types for use with the VxFS ondisk format.
 44  */
 45 typedef int32_t         vx_daddr_t;
 46 typedef int32_t         vx_ino_t;
 47 
 48 /*
 49  * Superblock magic number (vxfs_super->vs_magic).
 50  */
 51 #define VXFS_SUPER_MAGIC        0xa501FCF5
 52 
 53 /*
 54  * The root inode.
 55  */
 56 #define VXFS_ROOT_INO           2
 57 
 58 /*
 59  * Num of entries in free extent array
 60  */
 61 #define VXFS_NEFREE             32
 62 
 63 
 64 /*
 65  * VxFS superblock (disk).
 66  */
 67 struct vxfs_sb {
 68         /*
 69          * Readonly fields for the version 1 superblock.
 70          *
 71          * Lots of this fields are no more used by version 2
 72          * and never filesystems.
 73          */
 74         u_int32_t       vs_magic;               /* Magic number */
 75         int32_t         vs_version;             /* VxFS version */
 76         u_int32_t       vs_ctime;               /* create time - secs */
 77         u_int32_t       vs_cutime;              /* create time - usecs */
 78         int32_t         __unused1;              /* unused */
 79         int32_t         __unused2;              /* unused */
 80         vx_daddr_t      vs_old_logstart;        /* obsolete */
 81         vx_daddr_t      vs_old_logend;          /* obsolete */
 82         int32_t         vs_bsize;               /* block size */
 83         int32_t         vs_size;                /* number of blocks */
 84         int32_t         vs_dsize;               /* number of data blocks */
 85         u_int32_t       vs_old_ninode;          /* obsolete */
 86         int32_t         vs_old_nau;             /* obsolete */
 87         int32_t         __unused3;              /* unused */
 88         int32_t         vs_old_defiextsize;     /* obsolete */
 89         int32_t         vs_old_ilbsize;         /* obsolete */
 90         int32_t         vs_immedlen;            /* size of immediate data area */
 91         int32_t         vs_ndaddr;              /* number of direct extentes */
 92         vx_daddr_t      vs_firstau;             /* address of first AU */
 93         vx_daddr_t      vs_emap;                /* offset of extent map in AU */
 94         vx_daddr_t      vs_imap;                /* offset of inode map in AU */
 95         vx_daddr_t      vs_iextop;              /* offset of ExtOp. map in AU */
 96         vx_daddr_t      vs_istart;              /* offset of inode list in AU */
 97         vx_daddr_t      vs_bstart;              /* offset of fdblock in AU */
 98         vx_daddr_t      vs_femap;               /* aufirst + emap */
 99         vx_daddr_t      vs_fimap;               /* aufirst + imap */
100         vx_daddr_t      vs_fiextop;             /* aufirst + iextop */
101         vx_daddr_t      vs_fistart;             /* aufirst + istart */
102         vx_daddr_t      vs_fbstart;             /* aufirst + bstart */
103         int32_t         vs_nindir;              /* number of entries in indir */
104         int32_t         vs_aulen;               /* length of AU in blocks */
105         int32_t         vs_auimlen;             /* length of imap in blocks */
106         int32_t         vs_auemlen;             /* length of emap in blocks */
107         int32_t         vs_auilen;              /* length of ilist in blocks */
108         int32_t         vs_aupad;               /* length of pad in blocks */
109         int32_t         vs_aublocks;            /* data blocks in AU */
110         int32_t         vs_maxtier;             /* log base 2 of aublocks */
111         int32_t         vs_inopb;               /* number of inodes per blk */
112         int32_t         vs_old_inopau;          /* obsolete */
113         int32_t         vs_old_inopilb;         /* obsolete */
114         int32_t         vs_old_ndiripau;        /* obsolete */
115         int32_t         vs_iaddrlen;            /* size of indirect addr ext. */
116         int32_t         vs_bshift;              /* log base 2 of bsize */
117         int32_t         vs_inoshift;            /* log base 2 of inobp */
118         int32_t         vs_bmask;               /* ~( bsize - 1 ) */
119         int32_t         vs_boffmask;            /* bsize - 1 */
120         int32_t         vs_old_inomask;         /* old_inopilb - 1 */
121         int32_t         vs_checksum;            /* checksum of V1 data */
122         
123         /*
124          * Version 1, writable
125          */
126         int32_t         vs_free;                /* number of free blocks */
127         int32_t         vs_ifree;               /* number of free inodes */
128         int32_t         vs_efree[VXFS_NEFREE];  /* number of free extents by size */
129         int32_t         vs_flags;               /* flags ?!? */
130         u_int8_t        vs_mod;                 /* filesystem has been changed */
131         u_int8_t        vs_clean;               /* clean FS */
132         u_int16_t       __unused4;              /* unused */
133         u_int32_t       vs_firstlogid;          /* mount time log ID */
134         u_int32_t       vs_wtime;               /* last time written - sec */
135         u_int32_t       vs_wutime;              /* last time written - usec */
136         u_int8_t        vs_fname[6];            /* FS name */
137         u_int8_t        vs_fpack[6];            /* FS pack name */
138         int32_t         vs_logversion;          /* log format version */
139         int32_t         __unused5;              /* unused */
140         
141         /*
142          * Version 2, Read-only
143          */
144         vx_daddr_t      vs_oltext[2];           /* OLT extent and replica */
145         int32_t         vs_oltsize;             /* OLT extent size */
146         int32_t         vs_iauimlen;            /* size of inode map */
147         int32_t         vs_iausize;             /* size of IAU in blocks */
148         int32_t         vs_dinosize;            /* size of inode in bytes */
149         int32_t         vs_old_dniaddr;         /* indir levels per inode */
150         int32_t         vs_checksum2;           /* checksum of V2 RO */
151 
152         /*
153          * Actually much more...
154          */
155 };
156 
157 
158 /*
159  * In core superblock filesystem private data for VxFS.
160  */
161 struct vxfs_sb_info {
162         struct vxfs_sb          *vsi_raw;       /* raw (on disk) superblock */
163         struct buffer_head      *vsi_bp;        /* buffer for raw superblock*/
164         struct inode            *vsi_fship;     /* fileset header inode */
165         struct inode            *vsi_ilist;     /* inode list inode */
166         struct inode            *vsi_stilist;   /* structural inode list inode */
167         u_long                  vsi_iext;       /* initial inode list */
168         ino_t                   vsi_fshino;     /* fileset header inode */
169         daddr_t                 vsi_oltext;     /* OLT extent */
170         daddr_t                 vsi_oltsize;    /* OLT size */
171 };
172 
173 
174 /*
175  * File modes.  File types above 0xf000 are vxfs internal only, they should
176  * not be passed back to higher levels of the system.  vxfs file types must
177  * never have one of the regular file type bits set.
178  */
179 enum vxfs_mode {
180         VXFS_ISUID = 0x00000800,        /* setuid */
181         VXFS_ISGID = 0x00000400,        /* setgid */
182         VXFS_ISVTX = 0x00000200,        /* sticky bit */
183         VXFS_IREAD = 0x00000100,        /* read */
184         VXFS_IWRITE = 0x00000080,       /* write */
185         VXFS_IEXEC = 0x00000040,        /* exec */
186 
187         VXFS_IFIFO = 0x00001000,        /* Named pipe */
188         VXFS_IFCHR = 0x00002000,        /* Character device */
189         VXFS_IFDIR = 0x00004000,        /* Directory */
190         VXFS_IFNAM = 0x00005000,        /* Xenix device ?? */
191         VXFS_IFBLK = 0x00006000,        /* Block device */
192         VXFS_IFREG = 0x00008000,        /* Regular file */
193         VXFS_IFCMP = 0x00009000,        /* Compressed file ?!? */
194         VXFS_IFLNK = 0x0000a000,        /* Symlink */
195         VXFS_IFSOC = 0x0000c000,        /* Socket */
196 
197         /* VxFS internal */
198         VXFS_IFFSH = 0x10000000,        /* Fileset header */
199         VXFS_IFILT = 0x20000000,        /* Inode list */
200         VXFS_IFIAU = 0x30000000,        /* Inode allocation unit */
201         VXFS_IFCUT = 0x40000000,        /* Current usage table */
202         VXFS_IFATT = 0x50000000,        /* Attr. inode */
203         VXFS_IFLCT = 0x60000000,        /* Link count table */
204         VXFS_IFIAT = 0x70000000,        /* Indirect attribute file */
205         VXFS_IFEMR = 0x80000000,        /* Extent map reorg file */
206         VXFS_IFQUO = 0x90000000,        /* BSD quota file */
207         VXFS_IFPTI = 0xa0000000,        /* "Pass through" inode */
208         VXFS_IFLAB = 0x11000000,        /* Device label file */
209         VXFS_IFOLT = 0x12000000,        /* OLT file */
210         VXFS_IFLOG = 0x13000000,        /* Log file */
211         VXFS_IFEMP = 0x14000000,        /* Extent map file */
212         VXFS_IFEAU = 0x15000000,        /* Extent AU file */
213         VXFS_IFAUS = 0x16000000,        /* Extent AU summary file */
214         VXFS_IFDEV = 0x17000000,        /* Device config file */
215 
216 };
217 
218 #define VXFS_TYPE_MASK          0xfffff000
219 
220 #define VXFS_IS_TYPE(ip,type)   (((ip)->vii_mode & VXFS_TYPE_MASK) == (type))
221 #define VXFS_ISFIFO(x)          VXFS_IS_TYPE((x),VXFS_IFIFO)
222 #define VXFS_ISCHR(x)           VXFS_IS_TYPE((x),VXFS_IFCHR)
223 #define VXFS_ISDIR(x)           VXFS_IS_TYPE((x),VXFS_IFDIR)
224 #define VXFS_ISNAM(x)           VXFS_IS_TYPE((x),VXFS_IFNAM)
225 #define VXFS_ISBLK(x)           VXFS_IS_TYPE((x),VXFS_IFBLK)
226 #define VXFS_ISLNK(x)           VXFS_IS_TYPE((x),VXFS_IFLNK)
227 #define VXFS_ISREG(x)           VXFS_IS_TYPE((x),VXFS_IFREG)
228 #define VXFS_ISCMP(x)           VXFS_IS_TYPE((x),VXFS_IFCMP)
229 #define VXFS_ISSOC(x)           VXFS_IS_TYPE((x),VXFS_IFSOC)
230 
231 #define VXFS_ISFSH(x)           VXFS_IS_TYPE((x),VXFS_IFFSH)
232 #define VXFS_ISILT(x)           VXFS_IS_TYPE((x),VXFS_IFILT)
233 
234 /*
235  * Inmode organisation types.
236  */
237 enum {
238         VXFS_ORG_NONE   = 0,    /* Inode has *no* format ?!? */
239         VXFS_ORG_EXT4   = 1,    /* Ext4 */
240         VXFS_ORG_IMMED  = 2,    /* All data stored in inode */
241         VXFS_ORG_TYPED  = 3,    /* Typed extents */
242 };
243 
244 #define VXFS_IS_ORG(ip,org)     ((ip)->vii_orgtype == (org))
245 #define VXFS_ISNONE(ip)         VXFS_IS_ORG((ip), VXFS_ORG_NONE)
246 #define VXFS_ISEXT4(ip)         VXFS_IS_ORG((ip), VXFS_ORG_EXT4)
247 #define VXFS_ISIMMED(ip)        VXFS_IS_ORG((ip), VXFS_ORG_IMMED)
248 #define VXFS_ISTYPED(ip)        VXFS_IS_ORG((ip), VXFS_ORG_TYPED)
249 
250 
251 /*
252  * Get filesystem private data from VFS inode.
253  */
254 #define VXFS_INO(ip) \
255         ((struct vxfs_inode_info *)(ip)->i_private)
256 
257 /*
258  * Get filesystem private data from VFS superblock.
259  */
260 #define VXFS_SBI(sbp) \
261         ((struct vxfs_sb_info *)(sbp)->s_fs_info)
262 
263 #endif /* _VXFS_SUPER_H_ */
264 

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