2 * linux/include/linux/ufs_fs.h
5 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
6 * Laboratory for Computer Science Research Computing Facility
7 * Rutgers, The State University of New Jersey
9 * Clean swab support by Fare <fare@tunes.org>
10 * just hope no one is using NNUUXXI on __?64 structure elements
11 * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>
13 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
14 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
15 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
17 * NeXTstep support added on February 5th 1998 by
18 * Niels Kristian Bech Jensen <nkbj@image.dk>.
20 * Write support by Daniel Pirkl <daniel.pirkl@email.cz>
22 * HP/UX hfs filesystem support added by
23 * Martin K. Petersen <mkp@mkp.net>, August 1999
25 * UFS2 (of FreeBSD 5.x) support added by
26 * Niraj Kumar <niraj17@iitbombay.org> , Jan 2004
30 #ifndef __LINUX_UFS_FS_H
31 #define __LINUX_UFS_FS_H
33 #include <linux/types.h>
34 #include <linux/kernel.h>
35 #include <linux/stat.h>
43 typedef __u64 __bitwise __fs64
;
44 typedef __u32 __bitwise __fs32
;
45 typedef __u16 __bitwise __fs16
;
48 #include <linux/ufs_fs_i.h>
49 #include <linux/ufs_fs_sb.h>
52 #define UFS_BBSIZE 8192
53 #define UFS_SBLOCK 8192
54 #define UFS_SBSIZE 8192
56 #define UFS_SECTOR_SIZE 512
57 #define UFS_SECTOR_BITS 9
58 #define UFS_MAGIC 0x00011954
59 #define UFS2_MAGIC 0x19540119
60 #define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */
62 /* Copied from FreeBSD */
64 * Each disk drive contains some number of filesystems.
65 * A filesystem consists of a number of cylinder groups.
66 * Each cylinder group has inodes and data.
68 * A filesystem is described by its super-block, which in turn
69 * describes the cylinder groups. The super-block is critical
70 * data and is replicated in each cylinder group to protect against
71 * catastrophic loss. This is done at `newfs' time and the critical
72 * super-block data does not change, so the copies need not be
73 * referenced further unless disaster strikes.
75 * For filesystem fs, the offsets of the various blocks of interest
76 * are given in the super block as:
77 * [fs->fs_sblkno] Super-block
78 * [fs->fs_cblkno] Cylinder group block
79 * [fs->fs_iblkno] Inode blocks
80 * [fs->fs_dblkno] Data blocks
81 * The beginning of cylinder group cg in fs, is given by
82 * the ``cgbase(fs, cg)'' macro.
84 * Depending on the architecture and the media, the superblock may
85 * reside in any one of four places. For tiny media where every block
86 * counts, it is placed at the very front of the partition. Historically,
87 * UFS1 placed it 8K from the front to leave room for the disk label and
88 * a small bootstrap. For UFS2 it got moved to 64K from the front to leave
89 * room for the disk label and a bigger bootstrap, and for really piggy
90 * systems we check at 256K from the front if the first three fail. In
91 * all cases the size of the superblock will be SBLOCKSIZE. All values are
92 * given in byte-offset form, so they do not imply a sector size. The
93 * SBLOCKSEARCH specifies the order in which the locations should be searched.
95 #define SBLOCK_FLOPPY 0
96 #define SBLOCK_UFS1 8192
97 #define SBLOCK_UFS2 65536
98 #define SBLOCK_PIGGY 262144
99 #define SBLOCKSIZE 8192
100 #define SBLOCKSEARCH \
101 { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 }
104 /* HP specific MAGIC values */
106 #define UFS_MAGIC_LFN 0x00095014 /* fs supports filenames > 14 chars */
107 #define UFS_CIGAM_LFN 0x14500900 /* srahc 41 < semanelif stroppus sf */
109 #define UFS_MAGIC_SEC 0x00612195 /* B1 security fs */
110 #define UFS_CIGAM_SEC 0x95216100
112 #define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */
113 #define UFS_CIGAM_FEA 0x12561900
115 #define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */
116 #define UFS_CIGAM_4GB 0x94192305
118 /* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */
119 #define UFS_FSF_LFN 0x00000001 /* long file names */
120 #define UFS_FSF_B1 0x00000002 /* B1 security */
121 #define UFS_FSF_LFS 0x00000002 /* large files */
122 #define UFS_FSF_LUID 0x00000004 /* large UIDs */
124 /* End of HP stuff */
127 #define UFS_BSIZE 8192
128 #define UFS_MINBSIZE 4096
129 #define UFS_FSIZE 1024
130 #define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE)
132 #define UFS_NDADDR 12
135 #define UFS_IND_BLOCK (UFS_NDADDR + 0)
136 #define UFS_DIND_BLOCK (UFS_NDADDR + 1)
137 #define UFS_TIND_BLOCK (UFS_NDADDR + 2)
139 #define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
140 #define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
141 #define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
142 #define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
144 #define UFS_ROOTINO 2
145 #define UFS_FIRST_INO (UFS_ROOTINO + 1)
147 #define UFS_USEEFT ((__u16)65535)
149 #define UFS_FSOK 0x7c269d38
150 #define UFS_FSACTIVE ((__s8)0x00)
151 #define UFS_FSCLEAN ((__s8)0x01)
152 #define UFS_FSSTABLE ((__s8)0x02)
153 #define UFS_FSOSF1 ((__s8)0x03) /* is this correct for DEC OSF/1? */
154 #define UFS_FSBAD ((__s8)0xff)
156 /* From here to next blank line, s_flags for ufs_sb_info */
157 /* directory entry encoding */
158 #define UFS_DE_MASK 0x00000010 /* mask for the following */
159 #define UFS_DE_OLD 0x00000000
160 #define UFS_DE_44BSD 0x00000010
162 #define UFS_UID_MASK 0x00000060 /* mask for the following */
163 #define UFS_UID_OLD 0x00000000
164 #define UFS_UID_44BSD 0x00000020
165 #define UFS_UID_EFT 0x00000040
166 /* superblock state encoding */
167 #define UFS_ST_MASK 0x00000700 /* mask for the following */
168 #define UFS_ST_OLD 0x00000000
169 #define UFS_ST_44BSD 0x00000100
170 #define UFS_ST_SUN 0x00000200
171 #define UFS_ST_SUNx86 0x00000400
172 /*cylinder group encoding */
173 #define UFS_CG_MASK 0x00003000 /* mask for the following */
174 #define UFS_CG_OLD 0x00000000
175 #define UFS_CG_44BSD 0x00002000
176 #define UFS_CG_SUN 0x00001000
177 /* filesystem type encoding */
178 #define UFS_TYPE_MASK 0x00010000 /* mask for the following */
179 #define UFS_TYPE_UFS1 0x00000000
180 #define UFS_TYPE_UFS2 0x00010000
183 /* fs_inodefmt options */
184 #define UFS_42INODEFMT -1
185 #define UFS_44INODEFMT 2
188 #define UFS_MOUNT_ONERROR 0x0000000F
189 #define UFS_MOUNT_ONERROR_PANIC 0x00000001
190 #define UFS_MOUNT_ONERROR_LOCK 0x00000002
191 #define UFS_MOUNT_ONERROR_UMOUNT 0x00000004
192 #define UFS_MOUNT_ONERROR_REPAIR 0x00000008
194 #define UFS_MOUNT_UFSTYPE 0x0000FFF0
195 #define UFS_MOUNT_UFSTYPE_OLD 0x00000010
196 #define UFS_MOUNT_UFSTYPE_44BSD 0x00000020
197 #define UFS_MOUNT_UFSTYPE_SUN 0x00000040
198 #define UFS_MOUNT_UFSTYPE_NEXTSTEP 0x00000080
199 #define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD 0x00000100
200 #define UFS_MOUNT_UFSTYPE_OPENSTEP 0x00000200
201 #define UFS_MOUNT_UFSTYPE_SUNx86 0x00000400
202 #define UFS_MOUNT_UFSTYPE_HP 0x00000800
203 #define UFS_MOUNT_UFSTYPE_UFS2 0x00001000
205 #define ufs_clear_opt(o,opt) o &= ~UFS_MOUNT_##opt
206 #define ufs_set_opt(o,opt) o |= UFS_MOUNT_##opt
207 #define ufs_test_opt(o,opt) ((o) & UFS_MOUNT_##opt)
210 * MINFREE gives the minimum acceptable percentage of file system
211 * blocks which may be free. If the freelist drops below this level
212 * only the superuser may continue to allocate blocks. This may
213 * be set to 0 if no reserve of free blocks is deemed necessary,
214 * however throughput drops by fifty percent if the file system
215 * is run at between 95% and 100% full; thus the minimum default
216 * value of fs_minfree is 5%. However, to get good clustering
217 * performance, 10% is a better choice. hence we use 10% as our
218 * default value. With 10% free space, fragmentation is not a
219 * problem, so we choose to optimize for time.
221 #define UFS_MINFREE 5
222 #define UFS_DEFAULTOPT UFS_OPTTIME
227 #ifdef CONFIG_UFS_DEBUG
228 # define UFSD(f, a...) { \
229 printk ("UFSD (%s, %d): %s:", \
230 __FILE__, __LINE__, __FUNCTION__); \
234 # define UFSD(f, a...) /**/
238 * Turn file system block numbers into disk block addresses.
239 * This maps file system blocks to device size blocks.
241 #define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb)
242 #define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb)
245 * Cylinder group macros to locate things in cylinder groups.
246 * They calc file system addresses of cylinder group data structures.
248 #define ufs_cgbase(c) (uspi->s_fpg * (c))
249 #define ufs_cgstart(c) ((uspi)->fs_magic == UFS2_MAGIC ? ufs_cgbase(c) : \
250 (ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask)))
251 #define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */
252 #define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */
253 #define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */
254 #define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */
257 * Macros for handling inode numbers:
258 * inode number to file system block offset.
259 * inode number to cylinder group number.
260 * inode number to file system block address.
262 #define ufs_inotocg(x) ((x) / uspi->s_ipg)
263 #define ufs_inotocgoff(x) ((x) % uspi->s_ipg)
264 #define ufs_inotofsba(x) (ufs_cgimin(ufs_inotocg(x)) + ufs_inotocgoff(x) / uspi->s_inopf)
265 #define ufs_inotofsbo(x) ((x) % uspi->s_inopf)
268 * Give cylinder group number for a file system block.
269 * Give cylinder group block number for a file system block.
271 #define ufs_dtog(d) ((d) / uspi->s_fpg)
272 #define ufs_dtogd(d) ((d) % uspi->s_fpg)
275 * Compute the cylinder and rotational position of a cyl block addr.
277 #define ufs_cbtocylno(bno) \
278 ((bno) * uspi->s_nspf / uspi->s_spc)
279 #define ufs_cbtorpos(bno) \
280 ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
281 * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
282 % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
283 * uspi->s_nrpos) / uspi->s_npsect)
286 * The following macros optimize certain frequently calculated
287 * quantities by using shifts and masks in place of divisions
288 * modulos and multiplications.
290 #define ufs_blkoff(loc) ((loc) & uspi->s_qbmask)
291 #define ufs_fragoff(loc) ((loc) & uspi->s_qfmask)
292 #define ufs_lblktosize(blk) ((blk) << uspi->s_bshift)
293 #define ufs_lblkno(loc) ((loc) >> uspi->s_bshift)
294 #define ufs_numfrags(loc) ((loc) >> uspi->s_fshift)
295 #define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask)
296 #define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask)
297 #define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift)
298 #define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift)
299 #define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask)
300 #define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask)
302 #define UFS_MAXNAMLEN 255
303 #define UFS_MAXMNTLEN 512
304 #define UFS2_MAXMNTLEN 468
305 #define UFS2_MAXVOLLEN 32
306 /* #define UFS_MAXCSBUFS 31 */
307 #define UFS_LINK_MAX 32000
309 #define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4)
311 #define UFS2_NOCSPTRS 28
314 * UFS_DIR_PAD defines the directory entries boundaries
315 * (must be a multiple of 4)
317 #define UFS_DIR_PAD 4
318 #define UFS_DIR_ROUND (UFS_DIR_PAD - 1)
319 #define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)
326 struct ufs_dir_entry
{
327 __fs32 d_ino
; /* inode number of this entry */
328 __fs16 d_reclen
; /* length of this entry */
330 __fs16 d_namlen
; /* actual length of d_name */
332 __u8 d_type
; /* file type */
333 __u8 d_namlen
; /* length of string in d_name */
336 __u8 d_name
[UFS_MAXNAMLEN
+ 1]; /* file name */
340 __fs32 cs_ndir
; /* number of directories */
341 __fs32 cs_nbfree
; /* number of free blocks */
342 __fs32 cs_nifree
; /* number of free inodes */
343 __fs32 cs_nffree
; /* number of free frags */
345 struct ufs2_csum_total
{
346 __fs64 cs_ndir
; /* number of directories */
347 __fs64 cs_nbfree
; /* number of free blocks */
348 __fs64 cs_nifree
; /* number of free inodes */
349 __fs64 cs_nffree
; /* number of free frags */
350 __fs64 cs_numclusters
; /* number of free clusters */
351 __fs64 cs_spare
[3]; /* future expansion */
354 struct ufs_csum_core
{
355 __u64 cs_ndir
; /* number of directories */
356 __u64 cs_nbfree
; /* number of free blocks */
357 __u64 cs_nifree
; /* number of free inodes */
358 __u64 cs_nffree
; /* number of free frags */
359 __u64 cs_numclusters
; /* number of free clusters */
365 #define UFS_UNCLEAN 0x01 /* file system not clean at mount (unused) */
366 #define UFS_DOSOFTDEP 0x02 /* file system using soft dependencies */
367 #define UFS_NEEDSFSCK 0x04 /* needs sync fsck (FreeBSD compat, unused) */
368 #define UFS_INDEXDIRS 0x08 /* kernel supports indexed directories */
369 #define UFS_ACLS 0x10 /* file system has ACLs enabled */
370 #define UFS_MULTILABEL 0x20 /* file system is MAC multi-label */
371 #define UFS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */
375 * This is the actual superblock, as it is laid out on the disk.
376 * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and
377 * it may occupy several blocks, use
378 * struct ufs_super_block_(first,second,third) instead.
380 struct ufs_super_block
{
381 __fs32 fs_link
; /* UNUSED */
382 __fs32 fs_rlink
; /* UNUSED */
383 __fs32 fs_sblkno
; /* addr of super-block in filesys */
384 __fs32 fs_cblkno
; /* offset of cyl-block in filesys */
385 __fs32 fs_iblkno
; /* offset of inode-blocks in filesys */
386 __fs32 fs_dblkno
; /* offset of first data after cg */
387 __fs32 fs_cgoffset
; /* cylinder group offset in cylinder */
388 __fs32 fs_cgmask
; /* used to calc mod fs_ntrak */
389 __fs32 fs_time
; /* last time written -- time_t */
390 __fs32 fs_size
; /* number of blocks in fs */
391 __fs32 fs_dsize
; /* number of data blocks in fs */
392 __fs32 fs_ncg
; /* number of cylinder groups */
393 __fs32 fs_bsize
; /* size of basic blocks in fs */
394 __fs32 fs_fsize
; /* size of frag blocks in fs */
395 __fs32 fs_frag
; /* number of frags in a block in fs */
396 /* these are configuration parameters */
397 __fs32 fs_minfree
; /* minimum percentage of free blocks */
398 __fs32 fs_rotdelay
; /* num of ms for optimal next block */
399 __fs32 fs_rps
; /* disk revolutions per second */
400 /* these fields can be computed from the others */
401 __fs32 fs_bmask
; /* ``blkoff'' calc of blk offsets */
402 __fs32 fs_fmask
; /* ``fragoff'' calc of frag offsets */
403 __fs32 fs_bshift
; /* ``lblkno'' calc of logical blkno */
404 __fs32 fs_fshift
; /* ``numfrags'' calc number of frags */
405 /* these are configuration parameters */
406 __fs32 fs_maxcontig
; /* max number of contiguous blks */
407 __fs32 fs_maxbpg
; /* max number of blks per cyl group */
408 /* these fields can be computed from the others */
409 __fs32 fs_fragshift
; /* block to frag shift */
410 __fs32 fs_fsbtodb
; /* fsbtodb and dbtofsb shift constant */
411 __fs32 fs_sbsize
; /* actual size of super block */
412 __fs32 fs_csmask
; /* csum block offset */
413 __fs32 fs_csshift
; /* csum block number */
414 __fs32 fs_nindir
; /* value of NINDIR */
415 __fs32 fs_inopb
; /* value of INOPB */
416 __fs32 fs_nspf
; /* value of NSPF */
417 /* yet another configuration parameter */
418 __fs32 fs_optim
; /* optimization preference, see below */
419 /* these fields are derived from the hardware */
422 __fs32 fs_npsect
; /* # sectors/track including spares */
425 __fs32 fs_state
; /* file system state time stamp */
428 __fs32 fs_interleave
; /* hardware sector interleave */
429 __fs32 fs_trackskew
; /* sector 0 skew, per track */
430 /* a unique id for this filesystem (currently unused and unmaintained) */
431 /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */
432 /* Neither of those fields is used in the Tahoe code right now but */
433 /* there could be problems if they are. */
434 __fs32 fs_id
[2]; /* file system id */
435 /* sizes determined by number of cylinder groups and their sizes */
436 __fs32 fs_csaddr
; /* blk addr of cyl grp summary area */
437 __fs32 fs_cssize
; /* size of cyl grp summary area */
438 __fs32 fs_cgsize
; /* cylinder group size */
439 /* these fields are derived from the hardware */
440 __fs32 fs_ntrak
; /* tracks per cylinder */
441 __fs32 fs_nsect
; /* sectors per track */
442 __fs32 fs_spc
; /* sectors per cylinder */
443 /* this comes from the disk driver partitioning */
444 __fs32 fs_ncyl
; /* cylinders in file system */
445 /* these fields can be computed from the others */
446 __fs32 fs_cpg
; /* cylinders per group */
447 __fs32 fs_ipg
; /* inodes per cylinder group */
448 __fs32 fs_fpg
; /* blocks per group * fs_frag */
449 /* this data must be re-computed after crashes */
450 struct ufs_csum fs_cstotal
; /* cylinder summary information */
451 /* these fields are cleared at mount time */
452 __s8 fs_fmod
; /* super block modified flag */
453 __s8 fs_clean
; /* file system is clean flag */
454 __s8 fs_ronly
; /* mounted read-only flag */
458 __s8 fs_fsmnt
[UFS_MAXMNTLEN
];/* name mounted on */
459 __fs32 fs_cgrotor
; /* last cg searched */
460 __fs32 fs_csp
[UFS_MAXCSBUFS
];/*list of fs_cs info buffers */
461 __fs32 fs_maxcluster
;
462 __fs32 fs_cpc
; /* cyl per cycle in postbl */
463 __fs16 fs_opostbl
[16][8]; /* old rotation block list head */
466 __s8 fs_fsmnt
[UFS2_MAXMNTLEN
]; /* name mounted on */
467 __u8 fs_volname
[UFS2_MAXVOLLEN
]; /* volume name */
468 __fs64 fs_swuid
; /* system-wide uid */
469 __fs32 fs_pad
; /* due to alignment of fs_swuid */
470 __fs32 fs_cgrotor
; /* last cg searched */
471 __fs32 fs_ocsp
[UFS2_NOCSPTRS
]; /*list of fs_cs info buffers */
472 __fs32 fs_contigdirs
;/*# of contiguously allocated dirs */
473 __fs32 fs_csp
; /* cg summary info buffer for fs_cs */
474 __fs32 fs_maxcluster
;
475 __fs32 fs_active
;/* used by snapshots to track fs */
476 __fs32 fs_old_cpc
; /* cyl per cycle in postbl */
477 __fs32 fs_maxbsize
;/*maximum blocking factor permitted */
478 __fs64 fs_sparecon64
[17];/*old rotation block list head */
479 __fs64 fs_sblockloc
; /* byte offset of standard superblock */
480 struct ufs2_csum_total fs_cstotal
;/*cylinder summary information*/
481 struct ufs_timeval fs_time
; /* last time written */
482 __fs64 fs_size
; /* number of blocks in fs */
483 __fs64 fs_dsize
; /* number of data blocks in fs */
484 __fs64 fs_csaddr
; /* blk addr of cyl grp summary area */
485 __fs64 fs_pendingblocks
;/* blocks in process of being freed */
486 __fs32 fs_pendinginodes
;/*inodes in process of being freed */
491 __fs32 fs_sparecon
[53];/* reserved for future constants */
493 __fs32 fs_sparecon2
[1];
494 __fs32 fs_state
; /* file system state time stamp */
495 __fs32 fs_qbmask
[2]; /* ~usb_bmask */
496 __fs32 fs_qfmask
[2]; /* ~usb_fmask */
499 __fs32 fs_sparecon
[53];/* reserved for future constants */
501 __fs32 fs_sparecon2
[1];
502 __fs32 fs_npsect
; /* # sectors/track including spares */
503 __fs32 fs_qbmask
[2]; /* ~usb_bmask */
504 __fs32 fs_qfmask
[2]; /* ~usb_fmask */
507 __fs32 fs_sparecon
[50];/* reserved for future constants */
508 __fs32 fs_contigsumsize
;/* size of cluster summary array */
509 __fs32 fs_maxsymlinklen
;/* max length of an internal symlink */
510 __fs32 fs_inodefmt
; /* format of on-disk inodes */
511 __fs32 fs_maxfilesize
[2]; /* max representable file size */
512 __fs32 fs_qbmask
[2]; /* ~usb_bmask */
513 __fs32 fs_qfmask
[2]; /* ~usb_fmask */
514 __fs32 fs_state
; /* file system state time stamp */
517 __fs32 fs_postblformat
; /* format of positional layout tables */
518 __fs32 fs_nrpos
; /* number of rotational positions */
519 __fs32 fs_postbloff
; /* (__s16) rotation block list head */
520 __fs32 fs_rotbloff
; /* (__u8) blocks for each rotation */
521 __fs32 fs_magic
; /* magic number */
522 __u8 fs_space
[1]; /* list of blocks for each rotation */
524 #endif/*struct ufs_super_block*/
527 * Preference for optimization.
529 #define UFS_OPTTIME 0 /* minimize allocation time */
530 #define UFS_OPTSPACE 1 /* minimize disk fragmentation */
533 * Rotational layout table format types
535 #define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */
536 #define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */
539 * Convert cylinder group to base address of its global summary info.
541 #define fs_cs(indx) s_csp[(indx)]
544 * Cylinder group block for a file system.
546 * Writable fields in the cylinder group are protected by the associated
547 * super block lock fs->fs_lock.
549 #define CG_MAGIC 0x090255
550 #define ufs_cg_chkmagic(sb, ucg) \
551 (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC)
554 * size of this structure is 172 B
556 struct ufs_cylinder_group
{
557 __fs32 cg_link
; /* linked list of cyl groups */
558 __fs32 cg_magic
; /* magic number */
559 __fs32 cg_time
; /* time last written */
560 __fs32 cg_cgx
; /* we are the cgx'th cylinder group */
561 __fs16 cg_ncyl
; /* number of cyl's this cg */
562 __fs16 cg_niblk
; /* number of inode blocks this cg */
563 __fs32 cg_ndblk
; /* number of data blocks this cg */
564 struct ufs_csum cg_cs
; /* cylinder summary information */
565 __fs32 cg_rotor
; /* position of last used block */
566 __fs32 cg_frotor
; /* position of last used frag */
567 __fs32 cg_irotor
; /* position of last used inode */
568 __fs32 cg_frsum
[UFS_MAXFRAG
]; /* counts of available frags */
569 __fs32 cg_btotoff
; /* (__u32) block totals per cylinder */
570 __fs32 cg_boff
; /* (short) free block positions */
571 __fs32 cg_iusedoff
; /* (char) used inode map */
572 __fs32 cg_freeoff
; /* (u_char) free block map */
573 __fs32 cg_nextfreeoff
; /* (u_char) next available space */
576 __fs32 cg_clustersumoff
; /* (u_int32) counts of avail clusters */
577 __fs32 cg_clusteroff
; /* (u_int8) free cluster map */
578 __fs32 cg_nclusterblks
; /* number of clusters this cg */
579 __fs32 cg_sparecon
[13]; /* reserved for future use */
582 __fs32 cg_clustersumoff
;/* (u_int32) counts of avail clusters */
583 __fs32 cg_clusteroff
; /* (u_int8) free cluster map */
584 __fs32 cg_nclusterblks
;/* number of clusters this cg */
585 __fs32 cg_niblk
; /* number of inode blocks this cg */
586 __fs32 cg_initediblk
; /* last initialized inode */
587 __fs32 cg_sparecon32
[3];/* reserved for future use */
588 __fs64 cg_time
; /* time last written */
589 __fs64 cg_sparecon
[3]; /* reserved for future use */
591 __fs32 cg_sparecon
[16]; /* reserved for future use */
593 __u8 cg_space
[1]; /* space for cylinder group maps */
594 /* actually longer */
598 * structure of an on-disk inode
601 __fs16 ui_mode
; /* 0x0 */
602 __fs16 ui_nlink
; /* 0x2 */
605 __fs16 ui_suid
; /* 0x4 */
606 __fs16 ui_sgid
; /* 0x6 */
608 __fs32 ui_inumber
; /* 0x4 lsf: inode number */
609 __fs32 ui_author
; /* 0x4 GNU HURD: author */
611 __fs64 ui_size
; /* 0x8 */
612 struct ufs_timeval ui_atime
; /* 0x10 access */
613 struct ufs_timeval ui_mtime
; /* 0x18 modification */
614 struct ufs_timeval ui_ctime
; /* 0x20 creation */
617 __fs32 ui_db
[UFS_NDADDR
];/* 0x28 data blocks */
618 __fs32 ui_ib
[UFS_NINDIR
];/* 0x58 indirect blocks */
620 __u8 ui_symlink
[4*(UFS_NDADDR
+UFS_NINDIR
)];/* 0x28 fast symlink */
622 __fs32 ui_flags
; /* 0x64 immutable, append-only... */
623 __fs32 ui_blocks
; /* 0x68 blocks in use */
624 __fs32 ui_gen
; /* 0x6c like ext2 i_version, for NFS support */
627 __fs32 ui_shadow
; /* 0x70 shadow inode with security data */
628 __fs32 ui_uid
; /* 0x74 long EFT version of uid */
629 __fs32 ui_gid
; /* 0x78 long EFT version of gid */
630 __fs32 ui_oeftflag
; /* 0x7c reserved */
633 __fs32 ui_uid
; /* 0x70 File owner */
634 __fs32 ui_gid
; /* 0x74 File group */
635 __fs32 ui_spare
[2]; /* 0x78 reserved */
638 __fs32 ui_uid
; /* 0x70 */
639 __fs32 ui_gid
; /* 0x74 */
640 __fs16 ui_modeh
; /* 0x78 mode high bits */
641 __fs16 ui_spare
; /* 0x7A unused */
642 __fs32 ui_trans
; /* 0x7c filesystem translator */
647 #define UFS_NXADDR 2 /* External addresses in inode. */
649 __fs16 ui_mode
; /* 0: IFMT, permissions; see below. */
650 __fs16 ui_nlink
; /* 2: File link count. */
651 __fs32 ui_uid
; /* 4: File owner. */
652 __fs32 ui_gid
; /* 8: File group. */
653 __fs32 ui_blksize
; /* 12: Inode blocksize. */
654 __fs64 ui_size
; /* 16: File byte count. */
655 __fs64 ui_blocks
; /* 24: Bytes actually held. */
656 struct ufs_timeval ui_atime
; /* 32: Last access time. */
657 struct ufs_timeval ui_mtime
; /* 40: Last modified time. */
658 struct ufs_timeval ui_ctime
; /* 48: Last inode change time. */
659 struct ufs_timeval ui_birthtime
; /* 56: Inode creation time. */
660 __fs32 ui_mtimensec
; /* 64: Last modified time. */
661 __fs32 ui_atimensec
; /* 68: Last access time. */
662 __fs32 ui_ctimensec
; /* 72: Last inode change time. */
663 __fs32 ui_birthnsec
; /* 76: Inode creation time. */
664 __fs32 ui_gen
; /* 80: Generation number. */
665 __fs32 ui_kernflags
; /* 84: Kernel flags. */
666 __fs32 ui_flags
; /* 88: Status flags (chflags). */
667 __fs32 ui_extsize
; /* 92: External attributes block. */
668 __fs64 ui_extb
[UFS_NXADDR
];/* 96: External attributes block. */
671 __fs64 ui_db
[UFS_NDADDR
]; /* 112: Direct disk blocks. */
672 __fs64 ui_ib
[UFS_NINDIR
];/* 208: Indirect disk blocks.*/
674 __u8 ui_symlink
[2*4*(UFS_NDADDR
+UFS_NINDIR
)];/* 0x28 fast symlink */
676 __fs64 ui_spare
[3]; /* 232: Reserved; currently unused */
680 /* FreeBSD has these in sys/stat.h */
681 /* ui_flags that can be set by a file owner */
682 #define UFS_UF_SETTABLE 0x0000ffff
683 #define UFS_UF_NODUMP 0x00000001 /* do not dump */
684 #define UFS_UF_IMMUTABLE 0x00000002 /* immutable (can't "change") */
685 #define UFS_UF_APPEND 0x00000004 /* append-only */
686 #define UFS_UF_OPAQUE 0x00000008 /* directory is opaque (unionfs) */
687 #define UFS_UF_NOUNLINK 0x00000010 /* can't be removed or renamed */
688 /* ui_flags that only root can set */
689 #define UFS_SF_SETTABLE 0xffff0000
690 #define UFS_SF_ARCHIVED 0x00010000 /* archived */
691 #define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */
692 #define UFS_SF_APPEND 0x00040000 /* append-only */
693 #define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */
696 * This structure is used for reading disk structures larger
697 * than the size of fragment.
699 struct ufs_buffer_head
{
700 __u64 fragment
; /* first fragment */
701 __u64 count
; /* number of fragments */
702 struct buffer_head
* bh
[UFS_MAXFRAG
]; /* buffers */
705 struct ufs_cg_private_info
{
706 struct ufs_buffer_head c_ubh
;
707 __u32 c_cgx
; /* number of cylidner group */
708 __u16 c_ncyl
; /* number of cyl's this cg */
709 __u16 c_niblk
; /* number of inode blocks this cg */
710 __u32 c_ndblk
; /* number of data blocks this cg */
711 __u32 c_rotor
; /* position of last used block */
712 __u32 c_frotor
; /* position of last used frag */
713 __u32 c_irotor
; /* position of last used inode */
714 __u32 c_btotoff
; /* (__u32) block totals per cylinder */
715 __u32 c_boff
; /* (short) free block positions */
716 __u32 c_iusedoff
; /* (char) used inode map */
717 __u32 c_freeoff
; /* (u_char) free block map */
718 __u32 c_nextfreeoff
; /* (u_char) next available space */
719 __u32 c_clustersumoff
;/* (u_int32) counts of avail clusters */
720 __u32 c_clusteroff
; /* (u_int8) free cluster map */
721 __u32 c_nclusterblks
; /* number of clusters this cg */
724 struct ufs_sb_private_info
{
725 struct ufs_buffer_head s_ubh
; /* buffer containing super block */
726 struct ufs_csum_core cs_total
;
727 __u32 s_sblkno
; /* offset of super-blocks in filesys */
728 __u32 s_cblkno
; /* offset of cg-block in filesys */
729 __u32 s_iblkno
; /* offset of inode-blocks in filesys */
730 __u32 s_dblkno
; /* offset of first data after cg */
731 __u32 s_cgoffset
; /* cylinder group offset in cylinder */
732 __u32 s_cgmask
; /* used to calc mod fs_ntrak */
733 __u32 s_size
; /* number of blocks (fragments) in fs */
734 __u32 s_dsize
; /* number of data blocks in fs */
735 __u64 s_u2_size
; /* ufs2: number of blocks (fragments) in fs */
736 __u64 s_u2_dsize
; /*ufs2: number of data blocks in fs */
737 __u32 s_ncg
; /* number of cylinder groups */
738 __u32 s_bsize
; /* size of basic blocks */
739 __u32 s_fsize
; /* size of fragments */
740 __u32 s_fpb
; /* fragments per block */
741 __u32 s_minfree
; /* minimum percentage of free blocks */
742 __u32 s_bmask
; /* `blkoff'' calc of blk offsets */
743 __u32 s_fmask
; /* s_fsize mask */
744 __u32 s_bshift
; /* `lblkno'' calc of logical blkno */
745 __u32 s_fshift
; /* s_fsize shift */
746 __u32 s_fpbshift
; /* fragments per block shift */
747 __u32 s_fsbtodb
; /* fsbtodb and dbtofsb shift constant */
748 __u32 s_sbsize
; /* actual size of super block */
749 __u32 s_csmask
; /* csum block offset */
750 __u32 s_csshift
; /* csum block number */
751 __u32 s_nindir
; /* value of NINDIR */
752 __u32 s_inopb
; /* value of INOPB */
753 __u32 s_nspf
; /* value of NSPF */
754 __u32 s_npsect
; /* # sectors/track including spares */
755 __u32 s_interleave
; /* hardware sector interleave */
756 __u32 s_trackskew
; /* sector 0 skew, per track */
757 __u32 s_csaddr
; /* blk addr of cyl grp summary area */
758 __u32 s_cssize
; /* size of cyl grp summary area */
759 __u32 s_cgsize
; /* cylinder group size */
760 __u32 s_ntrak
; /* tracks per cylinder */
761 __u32 s_nsect
; /* sectors per track */
762 __u32 s_spc
; /* sectors per cylinder */
763 __u32 s_ipg
; /* inodes per cylinder group */
764 __u32 s_fpg
; /* fragments per group */
765 __u32 s_cpc
; /* cyl per cycle in postbl */
766 __s32 s_contigsumsize
;/* size of cluster summary array, 44bsd */
767 __s64 s_qbmask
; /* ~usb_bmask */
768 __s64 s_qfmask
; /* ~usb_fmask */
769 __s32 s_postblformat
; /* format of positional layout tables */
770 __s32 s_nrpos
; /* number of rotational positions */
771 __s32 s_postbloff
; /* (__s16) rotation block list head */
772 __s32 s_rotbloff
; /* (__u8) blocks for each rotation */
774 __u32 s_fpbmask
; /* fragments per block mask */
775 __u32 s_apb
; /* address per block */
776 __u32 s_2apb
; /* address per block^2 */
777 __u32 s_3apb
; /* address per block^3 */
778 __u32 s_apbmask
; /* address per block mask */
779 __u32 s_apbshift
; /* address per block shift */
780 __u32 s_2apbshift
; /* address per block shift * 2 */
781 __u32 s_3apbshift
; /* address per block shift * 3 */
782 __u32 s_nspfshift
; /* number of sector per fragment shift */
783 __u32 s_nspb
; /* number of sector per block */
784 __u32 s_inopf
; /* inodes per fragment */
785 __u32 s_sbbase
; /* offset of NeXTstep superblock */
786 __u32 s_bpf
; /* bits per fragment */
787 __u32 s_bpfshift
; /* bits per fragment shift*/
788 __u32 s_bpfmask
; /* bits per fragment mask */
790 __u32 s_maxsymlinklen
;/* upper limit on fast symlinks' size */
791 __s32 fs_magic
; /* filesystem magic */
795 * Sizes of this structures are:
796 * ufs_super_block_first 512
797 * ufs_super_block_second 512
798 * ufs_super_block_third 356
800 struct ufs_super_block_first
{
842 __fs32 fs_interleave
;
855 struct ufs_csum fs_cstotal
;
860 __s8 fs_fsmnt
[UFS_MAXMNTLEN
- 212];
864 struct ufs_super_block_second
{
869 __fs32 fs_csp
[UFS_MAXCSBUFS
];
870 __fs32 fs_maxcluster
;
872 __fs16 fs_opostbl
[82];
875 __s8 fs_fsmnt
[UFS2_MAXMNTLEN
- UFS_MAXMNTLEN
+ 212];
876 __u8 fs_volname
[UFS2_MAXVOLLEN
];
880 __fs32 fs_ocsp
[UFS2_NOCSPTRS
];
881 __fs32 fs_contigdirs
;
883 __fs32 fs_maxcluster
;
887 __fs64 fs_sparecon64
[17];
895 struct ufs_super_block_third
{
898 __fs16 fs_opostbl
[46];
901 __fs64 cs_nifree
; /* number of free inodes */
902 __fs64 cs_nffree
; /* number of free frags */
903 __fs64 cs_numclusters
; /* number of free clusters */
904 __fs64 cs_spare
[3]; /* future expansion */
905 struct ufs_timeval fs_time
; /* last time written */
906 __fs64 fs_size
; /* number of blocks in fs */
907 __fs64 fs_dsize
; /* number of data blocks in fs */
908 __fs64 fs_csaddr
; /* blk addr of cyl grp summary area */
909 __fs64 fs_pendingblocks
;/* blocks in process of being freed */
910 __fs32 fs_pendinginodes
;/*inodes in process of being freed */
911 } __attribute__ ((packed
)) fs_u2
;
915 __fs32 fs_sparecon
[53];/* reserved for future constants */
917 __fs32 fs_sparecon2
[1];
918 __fs32 fs_state
; /* file system state time stamp */
919 __fs32 fs_qbmask
[2]; /* ~usb_bmask */
920 __fs32 fs_qfmask
[2]; /* ~usb_fmask */
923 __fs32 fs_sparecon
[53];/* reserved for future constants */
925 __fs32 fs_sparecon2
[1];
926 __fs32 fs_npsect
; /* # sectors/track including spares */
927 __fs32 fs_qbmask
[2]; /* ~usb_bmask */
928 __fs32 fs_qfmask
[2]; /* ~usb_fmask */
931 __fs32 fs_sparecon
[50];/* reserved for future constants */
932 __fs32 fs_contigsumsize
;/* size of cluster summary array */
933 __fs32 fs_maxsymlinklen
;/* max length of an internal symlink */
934 __fs32 fs_inodefmt
; /* format of on-disk inodes */
935 __fs32 fs_maxfilesize
[2]; /* max representable file size */
936 __fs32 fs_qbmask
[2]; /* ~usb_bmask */
937 __fs32 fs_qfmask
[2]; /* ~usb_fmask */
938 __fs32 fs_state
; /* file system state time stamp */
941 __fs32 fs_postblformat
;
952 extern void ufs_free_fragments (struct inode
*, unsigned, unsigned);
953 extern void ufs_free_blocks (struct inode
*, unsigned, unsigned);
954 extern unsigned ufs_new_fragments(struct inode
*, __fs32
*, unsigned, unsigned,
955 unsigned, int *, struct page
*);
958 extern struct ufs_cg_private_info
* ufs_load_cylinder (struct super_block
*, unsigned);
959 extern void ufs_put_cylinder (struct super_block
*, unsigned);
962 extern struct inode_operations ufs_dir_inode_operations
;
963 extern int ufs_add_link (struct dentry
*, struct inode
*);
964 extern ino_t
ufs_inode_by_name(struct inode
*, struct dentry
*);
965 extern int ufs_make_empty(struct inode
*, struct inode
*);
966 extern struct ufs_dir_entry
*ufs_find_entry(struct inode
*, struct dentry
*, struct page
**);
967 extern int ufs_delete_entry(struct inode
*, struct ufs_dir_entry
*, struct page
*);
968 extern int ufs_empty_dir (struct inode
*);
969 extern struct ufs_dir_entry
*ufs_dotdot(struct inode
*, struct page
**);
970 extern void ufs_set_link(struct inode
*dir
, struct ufs_dir_entry
*de
,
971 struct page
*page
, struct inode
*inode
);
974 extern struct inode_operations ufs_file_inode_operations
;
975 extern const struct file_operations ufs_file_operations
;
977 extern const struct address_space_operations ufs_aops
;
980 extern void ufs_free_inode (struct inode
*inode
);
981 extern struct inode
* ufs_new_inode (struct inode
*, int);
984 extern void ufs_read_inode (struct inode
*);
985 extern void ufs_put_inode (struct inode
*);
986 extern int ufs_write_inode (struct inode
*, int);
987 extern int ufs_sync_inode (struct inode
*);
988 extern void ufs_delete_inode (struct inode
*);
989 extern struct buffer_head
* ufs_bread (struct inode
*, unsigned, int, int *);
990 extern int ufs_getfrag_block (struct inode
*inode
, sector_t fragment
, struct buffer_head
*bh_result
, int create
);
993 extern const struct file_operations ufs_dir_operations
;
996 extern void ufs_warning (struct super_block
*, const char *, const char *, ...) __attribute__ ((format (printf
, 3, 4)));
997 extern void ufs_error (struct super_block
*, const char *, const char *, ...) __attribute__ ((format (printf
, 3, 4)));
998 extern void ufs_panic (struct super_block
*, const char *, const char *, ...) __attribute__ ((format (printf
, 3, 4)));
1001 extern struct inode_operations ufs_fast_symlink_inode_operations
;
1004 extern int ufs_truncate (struct inode
*, loff_t
);
1006 static inline struct ufs_sb_info
*UFS_SB(struct super_block
*sb
)
1008 return sb
->s_fs_info
;
1011 static inline struct ufs_inode_info
*UFS_I(struct inode
*inode
)
1013 return container_of(inode
, struct ufs_inode_info
, vfs_inode
);
1016 #endif /* __KERNEL__ */
1018 #endif /* __LINUX_UFS_FS_H */