xref: /openbmc/linux/fs/ufs/ufs_fs.h (revision 498495dba268b20e8eadd7fe93c140c68b6cc9d2)
1  /* SPDX-License-Identifier: GPL-2.0 */
2  /*
3   *  linux/include/linux/ufs_fs.h
4   *
5   * Copyright (C) 1996
6   * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
7   * Laboratory for Computer Science Research Computing Facility
8   * Rutgers, The State University of New Jersey
9   *
10   * Clean swab support by Fare <fare@tunes.org>
11   * just hope no one is using NNUUXXI on __?64 structure elements
12   * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>
13   *
14   * 4.4BSD (FreeBSD) support added on February 1st 1998 by
15   * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
16   * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
17   *
18   * NeXTstep support added on February 5th 1998 by
19   * Niels Kristian Bech Jensen <nkbj@image.dk>.
20   *
21   * Write support by Daniel Pirkl <daniel.pirkl@email.cz>
22   *
23   * HP/UX hfs filesystem support added by
24   * Martin K. Petersen <mkp@mkp.net>, August 1999
25   *
26   * UFS2 (of FreeBSD 5.x) support added by
27   * Niraj Kumar <niraj17@iitbombay.org>  , Jan 2004
28   *
29   */
30  
31  #ifndef __LINUX_UFS_FS_H
32  #define __LINUX_UFS_FS_H
33  
34  #include <linux/types.h>
35  #include <linux/kernel.h>
36  #include <linux/stat.h>
37  #include <linux/fs.h>
38  #include <linux/workqueue.h>
39  
40  #include <asm/div64.h>
41  typedef __u64 __bitwise __fs64;
42  typedef __u32 __bitwise __fs32;
43  typedef __u16 __bitwise __fs16;
44  
45  #define UFS_BBLOCK 0
46  #define UFS_BBSIZE 8192
47  #define UFS_SBLOCK 8192
48  #define UFS_SBSIZE 8192
49  
50  #define UFS_SECTOR_SIZE 512
51  #define UFS_SECTOR_BITS 9
52  #define UFS_MAGIC  0x00011954
53  #define UFS_MAGIC_BW 0x0f242697
54  #define UFS2_MAGIC 0x19540119
55  #define UFS_CIGAM  0x54190100 /* byteswapped MAGIC */
56  
57  /* Copied from FreeBSD */
58  /*
59   * Each disk drive contains some number of filesystems.
60   * A filesystem consists of a number of cylinder groups.
61   * Each cylinder group has inodes and data.
62   *
63   * A filesystem is described by its super-block, which in turn
64   * describes the cylinder groups.  The super-block is critical
65   * data and is replicated in each cylinder group to protect against
66   * catastrophic loss.  This is done at `newfs' time and the critical
67   * super-block data does not change, so the copies need not be
68   * referenced further unless disaster strikes.
69   *
70   * For filesystem fs, the offsets of the various blocks of interest
71   * are given in the super block as:
72   *      [fs->fs_sblkno]         Super-block
73   *      [fs->fs_cblkno]         Cylinder group block
74   *      [fs->fs_iblkno]         Inode blocks
75   *      [fs->fs_dblkno]         Data blocks
76   * The beginning of cylinder group cg in fs, is given by
77   * the ``cgbase(fs, cg)'' macro.
78   *
79   * Depending on the architecture and the media, the superblock may
80   * reside in any one of four places. For tiny media where every block
81   * counts, it is placed at the very front of the partition. Historically,
82   * UFS1 placed it 8K from the front to leave room for the disk label and
83   * a small bootstrap. For UFS2 it got moved to 64K from the front to leave
84   * room for the disk label and a bigger bootstrap, and for really piggy
85   * systems we check at 256K from the front if the first three fail. In
86   * all cases the size of the superblock will be SBLOCKSIZE. All values are
87   * given in byte-offset form, so they do not imply a sector size. The
88   * SBLOCKSEARCH specifies the order in which the locations should be searched.
89   */
90  #define SBLOCK_FLOPPY        0
91  #define SBLOCK_UFS1       8192
92  #define SBLOCK_UFS2      65536
93  #define SBLOCK_PIGGY    262144
94  #define SBLOCKSIZE        8192
95  #define SBLOCKSEARCH \
96          { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 }
97  
98  
99  /* HP specific MAGIC values */
100  
101  #define UFS_MAGIC_LFN   0x00095014 /* fs supports filenames > 14 chars */
102  #define UFS_CIGAM_LFN   0x14500900 /* srahc 41 < semanelif stroppus sf */
103  
104  #define UFS_MAGIC_SEC   0x00612195 /* B1 security fs */
105  #define UFS_CIGAM_SEC   0x95216100
106  
107  #define UFS_MAGIC_FEA   0x00195612 /* fs_featurebits supported */
108  #define UFS_CIGAM_FEA   0x12561900
109  
110  #define UFS_MAGIC_4GB   0x05231994 /* fs > 4 GB && fs_featurebits */
111  #define UFS_CIGAM_4GB   0x94192305
112  
113  /* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */
114  #define UFS_FSF_LFN     0x00000001 /* long file names */
115  #define UFS_FSF_B1      0x00000002 /* B1 security */
116  #define UFS_FSF_LFS     0x00000002 /* large files */
117  #define UFS_FSF_LUID    0x00000004 /* large UIDs */
118  
119  /* End of HP stuff */
120  
121  
122  #define UFS_BSIZE	8192
123  #define UFS_MINBSIZE	4096
124  #define UFS_FSIZE	1024
125  #define UFS_MAXFRAG	(UFS_BSIZE / UFS_FSIZE)
126  
127  #define UFS_NDADDR 12
128  #define UFS_NINDIR 3
129  
130  #define UFS_IND_BLOCK	(UFS_NDADDR + 0)
131  #define UFS_DIND_BLOCK	(UFS_NDADDR + 1)
132  #define UFS_TIND_BLOCK	(UFS_NDADDR + 2)
133  
134  #define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
135  #define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
136  #define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
137  #define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
138  
139  #define UFS_ROOTINO 2
140  #define UFS_FIRST_INO (UFS_ROOTINO + 1)
141  
142  #define UFS_USEEFT  ((__u16)65535)
143  
144  /* fs_clean values */
145  #define UFS_FSOK      0x7c269d38
146  #define UFS_FSACTIVE  ((__s8)0x00)
147  #define UFS_FSCLEAN   ((__s8)0x01)
148  #define UFS_FSSTABLE  ((__s8)0x02)
149  #define UFS_FSOSF1    ((__s8)0x03)	/* is this correct for DEC OSF/1? */
150  #define UFS_FSBAD     ((__s8)0xff)
151  
152  /* Solaris-specific fs_clean values */
153  #define UFS_FSSUSPEND ((__s8)0xfe)	/* temporarily suspended */
154  #define UFS_FSLOG     ((__s8)0xfd)	/* logging fs */
155  #define UFS_FSFIX     ((__s8)0xfc)	/* being repaired while mounted */
156  
157  /* From here to next blank line, s_flags for ufs_sb_info */
158  /* directory entry encoding */
159  #define UFS_DE_MASK		0x00000010	/* mask for the following */
160  #define UFS_DE_OLD		0x00000000
161  #define UFS_DE_44BSD		0x00000010
162  /* uid encoding */
163  #define UFS_UID_MASK		0x00000060	/* mask for the following */
164  #define UFS_UID_OLD		0x00000000
165  #define UFS_UID_44BSD		0x00000020
166  #define UFS_UID_EFT		0x00000040
167  /* superblock state encoding */
168  #define UFS_ST_MASK		0x00000700	/* mask for the following */
169  #define UFS_ST_OLD		0x00000000
170  #define UFS_ST_44BSD		0x00000100
171  #define UFS_ST_SUN		0x00000200 /* Solaris */
172  #define UFS_ST_SUNOS		0x00000300
173  #define UFS_ST_SUNx86		0x00000400 /* Solaris x86 */
174  /*cylinder group encoding */
175  #define UFS_CG_MASK		0x00003000	/* mask for the following */
176  #define UFS_CG_OLD		0x00000000
177  #define UFS_CG_44BSD		0x00002000
178  #define UFS_CG_SUN		0x00001000
179  /* filesystem type encoding */
180  #define UFS_TYPE_MASK		0x00010000	/* mask for the following */
181  #define UFS_TYPE_UFS1		0x00000000
182  #define UFS_TYPE_UFS2		0x00010000
183  
184  
185  /* fs_inodefmt options */
186  #define UFS_42INODEFMT	-1
187  #define UFS_44INODEFMT	2
188  
189  /*
190   * MINFREE gives the minimum acceptable percentage of file system
191   * blocks which may be free. If the freelist drops below this level
192   * only the superuser may continue to allocate blocks. This may
193   * be set to 0 if no reserve of free blocks is deemed necessary,
194   * however throughput drops by fifty percent if the file system
195   * is run at between 95% and 100% full; thus the minimum default
196   * value of fs_minfree is 5%. However, to get good clustering
197   * performance, 10% is a better choice. hence we use 10% as our
198   * default value. With 10% free space, fragmentation is not a
199   * problem, so we choose to optimize for time.
200   */
201  #define UFS_MINFREE         5
202  #define UFS_DEFAULTOPT      UFS_OPTTIME
203  
204  /*
205   * Turn file system block numbers into disk block addresses.
206   * This maps file system blocks to device size blocks.
207   */
208  #define ufs_fsbtodb(uspi, b)	((b) << (uspi)->s_fsbtodb)
209  #define	ufs_dbtofsb(uspi, b)	((b) >> (uspi)->s_fsbtodb)
210  
211  /*
212   * Cylinder group macros to locate things in cylinder groups.
213   * They calc file system addresses of cylinder group data structures.
214   */
215  #define	ufs_cgbase(c)	(uspi->s_fpg * (c))
216  #define ufs_cgstart(c)	((uspi)->fs_magic == UFS2_MAGIC ?  ufs_cgbase(c) : \
217  	(ufs_cgbase(c)  + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask)))
218  #define	ufs_cgsblock(c)	(ufs_cgstart(c) + uspi->s_sblkno)	/* super blk */
219  #define	ufs_cgcmin(c)	(ufs_cgstart(c) + uspi->s_cblkno)	/* cg block */
220  #define	ufs_cgimin(c)	(ufs_cgstart(c) + uspi->s_iblkno)	/* inode blk */
221  #define	ufs_cgdmin(c)	(ufs_cgstart(c) + uspi->s_dblkno)	/* 1st data */
222  
223  /*
224   * Macros for handling inode numbers:
225   *     inode number to file system block offset.
226   *     inode number to cylinder group number.
227   *     inode number to file system block address.
228   */
229  #define	ufs_inotocg(x)		((x) / uspi->s_ipg)
230  #define	ufs_inotocgoff(x)	((x) % uspi->s_ipg)
231  #define	ufs_inotofsba(x)	(((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf)
232  #define	ufs_inotofsbo(x)	((x) % uspi->s_inopf)
233  
234  /*
235   * Compute the cylinder and rotational position of a cyl block addr.
236   */
237  #define ufs_cbtocylno(bno) \
238  	((bno) * uspi->s_nspf / uspi->s_spc)
239  #define ufs_cbtorpos(bno)				      \
240  	((UFS_SB(sb)->s_flags & UFS_CG_SUN) ?		      \
241  	 (((((bno) * uspi->s_nspf % uspi->s_spc) %	      \
242  	    uspi->s_nsect) *				      \
243  	   uspi->s_nrpos) / uspi->s_nsect)		      \
244  	 :						      \
245  	((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
246  	* uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
247  	% uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
248  	  * uspi->s_nrpos) / uspi->s_npsect))
249  
250  /*
251   * The following macros optimize certain frequently calculated
252   * quantities by using shifts and masks in place of divisions
253   * modulos and multiplications.
254   */
255  #define ufs_blkoff(loc)		((loc) & uspi->s_qbmask)
256  #define ufs_fragoff(loc)	((loc) & uspi->s_qfmask)
257  #define ufs_lblktosize(blk)	((blk) << uspi->s_bshift)
258  #define ufs_lblkno(loc)		((loc) >> uspi->s_bshift)
259  #define ufs_numfrags(loc)	((loc) >> uspi->s_fshift)
260  #define ufs_blkroundup(size)	(((size) + uspi->s_qbmask) & uspi->s_bmask)
261  #define ufs_fragroundup(size)	(((size) + uspi->s_qfmask) & uspi->s_fmask)
262  #define ufs_fragstoblks(frags)	((frags) >> uspi->s_fpbshift)
263  #define ufs_blkstofrags(blks)	((blks) << uspi->s_fpbshift)
264  #define ufs_fragnum(fsb)	((fsb) & uspi->s_fpbmask)
265  #define ufs_blknum(fsb)		((fsb) & ~uspi->s_fpbmask)
266  
267  #define	UFS_MAXNAMLEN 255
268  #define UFS_MAXMNTLEN 512
269  #define UFS2_MAXMNTLEN 468
270  #define UFS2_MAXVOLLEN 32
271  #define UFS_MAXCSBUFS 31
272  #define UFS_LINK_MAX 32000
273  /*
274  #define	UFS2_NOCSPTRS	((128 / sizeof(void *)) - 4)
275  */
276  #define	UFS2_NOCSPTRS	28
277  
278  /*
279   * UFS_DIR_PAD defines the directory entries boundaries
280   * (must be a multiple of 4)
281   */
282  #define UFS_DIR_PAD			4
283  #define UFS_DIR_ROUND			(UFS_DIR_PAD - 1)
284  #define UFS_DIR_REC_LEN(name_len)	(((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)
285  
286  struct ufs_timeval {
287  	__fs32	tv_sec;
288  	__fs32	tv_usec;
289  };
290  
291  struct ufs_dir_entry {
292  	__fs32  d_ino;			/* inode number of this entry */
293  	__fs16  d_reclen;		/* length of this entry */
294  	union {
295  		__fs16	d_namlen;		/* actual length of d_name */
296  		struct {
297  			__u8	d_type;		/* file type */
298  			__u8	d_namlen;	/* length of string in d_name */
299  		} d_44;
300  	} d_u;
301  	__u8	d_name[UFS_MAXNAMLEN + 1];	/* file name */
302  };
303  
304  struct ufs_csum {
305  	__fs32	cs_ndir;	/* number of directories */
306  	__fs32	cs_nbfree;	/* number of free blocks */
307  	__fs32	cs_nifree;	/* number of free inodes */
308  	__fs32	cs_nffree;	/* number of free frags */
309  };
310  struct ufs2_csum_total {
311  	__fs64	cs_ndir;	/* number of directories */
312  	__fs64	cs_nbfree;	/* number of free blocks */
313  	__fs64	cs_nifree;	/* number of free inodes */
314  	__fs64	cs_nffree;	/* number of free frags */
315  	__fs64   cs_numclusters;	/* number of free clusters */
316  	__fs64   cs_spare[3];	/* future expansion */
317  };
318  
319  struct ufs_csum_core {
320  	__u64	cs_ndir;	/* number of directories */
321  	__u64	cs_nbfree;	/* number of free blocks */
322  	__u64	cs_nifree;	/* number of free inodes */
323  	__u64	cs_nffree;	/* number of free frags */
324  	__u64   cs_numclusters;	/* number of free clusters */
325  };
326  
327  /*
328   * File system flags
329   */
330  #define UFS_UNCLEAN      0x01    /* file system not clean at mount (unused) */
331  #define UFS_DOSOFTDEP    0x02    /* file system using soft dependencies */
332  #define UFS_NEEDSFSCK    0x04    /* needs sync fsck (FreeBSD compat, unused) */
333  #define UFS_INDEXDIRS    0x08    /* kernel supports indexed directories */
334  #define UFS_ACLS         0x10    /* file system has ACLs enabled */
335  #define UFS_MULTILABEL   0x20    /* file system is MAC multi-label */
336  #define UFS_FLAGS_UPDATED 0x80   /* flags have been moved to new location */
337  
338  #if 0
339  /*
340   * This is the actual superblock, as it is laid out on the disk.
341   * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and
342   * it may occupy several blocks, use
343   * struct ufs_super_block_(first,second,third) instead.
344   */
345  struct ufs_super_block {
346  	union {
347  		struct {
348  			__fs32	fs_link;	/* UNUSED */
349  		} fs_42;
350  		struct {
351  			__fs32	fs_state;	/* file system state flag */
352  		} fs_sun;
353  	} fs_u0;
354  	__fs32	fs_rlink;	/* UNUSED */
355  	__fs32	fs_sblkno;	/* addr of super-block in filesys */
356  	__fs32	fs_cblkno;	/* offset of cyl-block in filesys */
357  	__fs32	fs_iblkno;	/* offset of inode-blocks in filesys */
358  	__fs32	fs_dblkno;	/* offset of first data after cg */
359  	__fs32	fs_cgoffset;	/* cylinder group offset in cylinder */
360  	__fs32	fs_cgmask;	/* used to calc mod fs_ntrak */
361  	__fs32	fs_time;	/* last time written -- time_t */
362  	__fs32	fs_size;	/* number of blocks in fs */
363  	__fs32	fs_dsize;	/* number of data blocks in fs */
364  	__fs32	fs_ncg;		/* number of cylinder groups */
365  	__fs32	fs_bsize;	/* size of basic blocks in fs */
366  	__fs32	fs_fsize;	/* size of frag blocks in fs */
367  	__fs32	fs_frag;	/* number of frags in a block in fs */
368  /* these are configuration parameters */
369  	__fs32	fs_minfree;	/* minimum percentage of free blocks */
370  	__fs32	fs_rotdelay;	/* num of ms for optimal next block */
371  	__fs32	fs_rps;		/* disk revolutions per second */
372  /* these fields can be computed from the others */
373  	__fs32	fs_bmask;	/* ``blkoff'' calc of blk offsets */
374  	__fs32	fs_fmask;	/* ``fragoff'' calc of frag offsets */
375  	__fs32	fs_bshift;	/* ``lblkno'' calc of logical blkno */
376  	__fs32	fs_fshift;	/* ``numfrags'' calc number of frags */
377  /* these are configuration parameters */
378  	__fs32	fs_maxcontig;	/* max number of contiguous blks */
379  	__fs32	fs_maxbpg;	/* max number of blks per cyl group */
380  /* these fields can be computed from the others */
381  	__fs32	fs_fragshift;	/* block to frag shift */
382  	__fs32	fs_fsbtodb;	/* fsbtodb and dbtofsb shift constant */
383  	__fs32	fs_sbsize;	/* actual size of super block */
384  	__fs32	fs_csmask;	/* csum block offset */
385  	__fs32	fs_csshift;	/* csum block number */
386  	__fs32	fs_nindir;	/* value of NINDIR */
387  	__fs32	fs_inopb;	/* value of INOPB */
388  	__fs32	fs_nspf;	/* value of NSPF */
389  /* yet another configuration parameter */
390  	__fs32	fs_optim;	/* optimization preference, see below */
391  /* these fields are derived from the hardware */
392  	union {
393  		struct {
394  			__fs32	fs_npsect;	/* # sectors/track including spares */
395  		} fs_sun;
396  		struct {
397  			__fs32	fs_state;	/* file system state time stamp */
398  		} fs_sunx86;
399  	} fs_u1;
400  	__fs32	fs_interleave;	/* hardware sector interleave */
401  	__fs32	fs_trackskew;	/* sector 0 skew, per track */
402  /* a unique id for this filesystem (currently unused and unmaintained) */
403  /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */
404  /* Neither of those fields is used in the Tahoe code right now but */
405  /* there could be problems if they are.                            */
406  	__fs32	fs_id[2];	/* file system id */
407  /* sizes determined by number of cylinder groups and their sizes */
408  	__fs32	fs_csaddr;	/* blk addr of cyl grp summary area */
409  	__fs32	fs_cssize;	/* size of cyl grp summary area */
410  	__fs32	fs_cgsize;	/* cylinder group size */
411  /* these fields are derived from the hardware */
412  	__fs32	fs_ntrak;	/* tracks per cylinder */
413  	__fs32	fs_nsect;	/* sectors per track */
414  	__fs32	fs_spc;		/* sectors per cylinder */
415  /* this comes from the disk driver partitioning */
416  	__fs32	fs_ncyl;	/* cylinders in file system */
417  /* these fields can be computed from the others */
418  	__fs32	fs_cpg;		/* cylinders per group */
419  	__fs32	fs_ipg;		/* inodes per cylinder group */
420  	__fs32	fs_fpg;		/* blocks per group * fs_frag */
421  /* this data must be re-computed after crashes */
422  	struct ufs_csum fs_cstotal;	/* cylinder summary information */
423  /* these fields are cleared at mount time */
424  	__s8	fs_fmod;	/* super block modified flag */
425  	__s8	fs_clean;	/* file system is clean flag */
426  	__s8	fs_ronly;	/* mounted read-only flag */
427  	__s8	fs_flags;
428  	union {
429  		struct {
430  			__s8	fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */
431  			__fs32	fs_cgrotor;	/* last cg searched */
432  			__fs32	fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */
433  			__fs32	fs_maxcluster;
434  			__fs32	fs_cpc;		/* cyl per cycle in postbl */
435  			__fs16	fs_opostbl[16][8]; /* old rotation block list head */
436  		} fs_u1;
437  		struct {
438  			__s8  fs_fsmnt[UFS2_MAXMNTLEN];	/* name mounted on */
439  			__u8   fs_volname[UFS2_MAXVOLLEN]; /* volume name */
440  			__fs64  fs_swuid;		/* system-wide uid */
441  			__fs32  fs_pad;	/* due to alignment of fs_swuid */
442  			__fs32   fs_cgrotor;     /* last cg searched */
443  			__fs32   fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */
444  			__fs32   fs_contigdirs;/*# of contiguously allocated dirs */
445  			__fs32   fs_csp;	/* cg summary info buffer for fs_cs */
446  			__fs32   fs_maxcluster;
447  			__fs32   fs_active;/* used by snapshots to track fs */
448  			__fs32   fs_old_cpc;	/* cyl per cycle in postbl */
449  			__fs32   fs_maxbsize;/*maximum blocking factor permitted */
450  			__fs64   fs_sparecon64[17];/*old rotation block list head */
451  			__fs64   fs_sblockloc; /* byte offset of standard superblock */
452  			struct  ufs2_csum_total fs_cstotal;/*cylinder summary information*/
453  			struct  ufs_timeval    fs_time;		/* last time written */
454  			__fs64    fs_size;		/* number of blocks in fs */
455  			__fs64    fs_dsize;	/* number of data blocks in fs */
456  			__fs64   fs_csaddr;	/* blk addr of cyl grp summary area */
457  			__fs64    fs_pendingblocks;/* blocks in process of being freed */
458  			__fs32    fs_pendinginodes;/*inodes in process of being freed */
459  		} fs_u2;
460  	}  fs_u11;
461  	union {
462  		struct {
463  			__fs32	fs_sparecon[53];/* reserved for future constants */
464  			__fs32	fs_reclaim;
465  			__fs32	fs_sparecon2[1];
466  			__fs32	fs_state;	/* file system state time stamp */
467  			__fs32	fs_qbmask[2];	/* ~usb_bmask */
468  			__fs32	fs_qfmask[2];	/* ~usb_fmask */
469  		} fs_sun;
470  		struct {
471  			__fs32	fs_sparecon[53];/* reserved for future constants */
472  			__fs32	fs_reclaim;
473  			__fs32	fs_sparecon2[1];
474  			__fs32	fs_npsect;	/* # sectors/track including spares */
475  			__fs32	fs_qbmask[2];	/* ~usb_bmask */
476  			__fs32	fs_qfmask[2];	/* ~usb_fmask */
477  		} fs_sunx86;
478  		struct {
479  			__fs32	fs_sparecon[50];/* reserved for future constants */
480  			__fs32	fs_contigsumsize;/* size of cluster summary array */
481  			__fs32	fs_maxsymlinklen;/* max length of an internal symlink */
482  			__fs32	fs_inodefmt;	/* format of on-disk inodes */
483  			__fs32	fs_maxfilesize[2];	/* max representable file size */
484  			__fs32	fs_qbmask[2];	/* ~usb_bmask */
485  			__fs32	fs_qfmask[2];	/* ~usb_fmask */
486  			__fs32	fs_state;	/* file system state time stamp */
487  		} fs_44;
488  	} fs_u2;
489  	__fs32	fs_postblformat;	/* format of positional layout tables */
490  	__fs32	fs_nrpos;		/* number of rotational positions */
491  	__fs32	fs_postbloff;		/* (__s16) rotation block list head */
492  	__fs32	fs_rotbloff;		/* (__u8) blocks for each rotation */
493  	__fs32	fs_magic;		/* magic number */
494  	__u8	fs_space[1];		/* list of blocks for each rotation */
495  };
496  #endif/*struct ufs_super_block*/
497  
498  /*
499   * Preference for optimization.
500   */
501  #define UFS_OPTTIME	0	/* minimize allocation time */
502  #define UFS_OPTSPACE	1	/* minimize disk fragmentation */
503  
504  /*
505   * Rotational layout table format types
506   */
507  #define UFS_42POSTBLFMT		-1	/* 4.2BSD rotational table format */
508  #define UFS_DYNAMICPOSTBLFMT	1	/* dynamic rotational table format */
509  
510  /*
511   * Convert cylinder group to base address of its global summary info.
512   */
513  #define fs_cs(indx) s_csp[(indx)]
514  
515  /*
516   * Cylinder group block for a file system.
517   *
518   * Writable fields in the cylinder group are protected by the associated
519   * super block lock fs->fs_lock.
520   */
521  #define	CG_MAGIC	0x090255
522  #define ufs_cg_chkmagic(sb, ucg) \
523  	(fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC)
524  /*
525   * Macros for access to old cylinder group array structures
526   */
527  #define ufs_ocg_blktot(sb, ucg)      fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot)
528  #define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno])
529  #define ufs_ocg_inosused(sb, ucg)    fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused)
530  #define ufs_ocg_blksfree(sb, ucg)    fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free)
531  #define ufs_ocg_chkmagic(sb, ucg) \
532  	(fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC)
533  
534  /*
535   * size of this structure is 172 B
536   */
537  struct	ufs_cylinder_group {
538  	__fs32	cg_link;		/* linked list of cyl groups */
539  	__fs32	cg_magic;		/* magic number */
540  	__fs32	cg_time;		/* time last written */
541  	__fs32	cg_cgx;			/* we are the cgx'th cylinder group */
542  	__fs16	cg_ncyl;		/* number of cyl's this cg */
543  	__fs16	cg_niblk;		/* number of inode blocks this cg */
544  	__fs32	cg_ndblk;		/* number of data blocks this cg */
545  	struct	ufs_csum cg_cs;		/* cylinder summary information */
546  	__fs32	cg_rotor;		/* position of last used block */
547  	__fs32	cg_frotor;		/* position of last used frag */
548  	__fs32	cg_irotor;		/* position of last used inode */
549  	__fs32	cg_frsum[UFS_MAXFRAG];	/* counts of available frags */
550  	__fs32	cg_btotoff;		/* (__u32) block totals per cylinder */
551  	__fs32	cg_boff;		/* (short) free block positions */
552  	__fs32	cg_iusedoff;		/* (char) used inode map */
553  	__fs32	cg_freeoff;		/* (u_char) free block map */
554  	__fs32	cg_nextfreeoff;		/* (u_char) next available space */
555  	union {
556  		struct {
557  			__fs32	cg_clustersumoff;	/* (u_int32) counts of avail clusters */
558  			__fs32	cg_clusteroff;		/* (u_int8) free cluster map */
559  			__fs32	cg_nclusterblks;	/* number of clusters this cg */
560  			__fs32	cg_sparecon[13];	/* reserved for future use */
561  		} cg_44;
562  		struct {
563  			__fs32	cg_clustersumoff;/* (u_int32) counts of avail clusters */
564  			__fs32	cg_clusteroff;	/* (u_int8) free cluster map */
565  			__fs32	cg_nclusterblks;/* number of clusters this cg */
566  			__fs32   cg_niblk; /* number of inode blocks this cg */
567  			__fs32   cg_initediblk;	/* last initialized inode */
568  			__fs32   cg_sparecon32[3];/* reserved for future use */
569  			__fs64   cg_time;	/* time last written */
570  			__fs64	cg_sparecon[3];	/* reserved for future use */
571  		} cg_u2;
572  		__fs32	cg_sparecon[16];	/* reserved for future use */
573  	} cg_u;
574  	__u8	cg_space[1];		/* space for cylinder group maps */
575  /* actually longer */
576  };
577  
578  /* Historic Cylinder group info */
579  struct ufs_old_cylinder_group {
580  	__fs32	cg_link;		/* linked list of cyl groups */
581  	__fs32	cg_rlink;		/* for incore cyl groups     */
582  	__fs32	cg_time;		/* time last written */
583  	__fs32	cg_cgx;			/* we are the cgx'th cylinder group */
584  	__fs16	cg_ncyl;		/* number of cyl's this cg */
585  	__fs16	cg_niblk;		/* number of inode blocks this cg */
586  	__fs32	cg_ndblk;		/* number of data blocks this cg */
587  	struct	ufs_csum cg_cs;		/* cylinder summary information */
588  	__fs32	cg_rotor;		/* position of last used block */
589  	__fs32	cg_frotor;		/* position of last used frag */
590  	__fs32	cg_irotor;		/* position of last used inode */
591  	__fs32	cg_frsum[8];		/* counts of available frags */
592  	__fs32	cg_btot[32];		/* block totals per cylinder */
593  	__fs16	cg_b[32][8];		/* positions of free blocks */
594  	__u8	cg_iused[256];		/* used inode map */
595  	__fs32	cg_magic;		/* magic number */
596  	__u8	cg_free[1];		/* free block map */
597  /* actually longer */
598  };
599  
600  /*
601   * structure of an on-disk inode
602   */
603  struct ufs_inode {
604  	__fs16	ui_mode;		/*  0x0 */
605  	__fs16	ui_nlink;		/*  0x2 */
606  	union {
607  		struct {
608  			__fs16	ui_suid;	/*  0x4 */
609  			__fs16	ui_sgid;	/*  0x6 */
610  		} oldids;
611  		__fs32	ui_inumber;		/*  0x4 lsf: inode number */
612  		__fs32	ui_author;		/*  0x4 GNU HURD: author */
613  	} ui_u1;
614  	__fs64	ui_size;		/*  0x8 */
615  	struct ufs_timeval ui_atime;	/* 0x10 access */
616  	struct ufs_timeval ui_mtime;	/* 0x18 modification */
617  	struct ufs_timeval ui_ctime;	/* 0x20 creation */
618  	union {
619  		struct {
620  			__fs32	ui_db[UFS_NDADDR];/* 0x28 data blocks */
621  			__fs32	ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */
622  		} ui_addr;
623  		__u8	ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
624  	} ui_u2;
625  	__fs32	ui_flags;		/* 0x64 immutable, append-only... */
626  	__fs32	ui_blocks;		/* 0x68 blocks in use */
627  	__fs32	ui_gen;			/* 0x6c like ext2 i_version, for NFS support */
628  	union {
629  		struct {
630  			__fs32	ui_shadow;	/* 0x70 shadow inode with security data */
631  			__fs32	ui_uid;		/* 0x74 long EFT version of uid */
632  			__fs32	ui_gid;		/* 0x78 long EFT version of gid */
633  			__fs32	ui_oeftflag;	/* 0x7c reserved */
634  		} ui_sun;
635  		struct {
636  			__fs32	ui_uid;		/* 0x70 File owner */
637  			__fs32	ui_gid;		/* 0x74 File group */
638  			__fs32	ui_spare[2];	/* 0x78 reserved */
639  		} ui_44;
640  		struct {
641  			__fs32	ui_uid;		/* 0x70 */
642  			__fs32	ui_gid;		/* 0x74 */
643  			__fs16	ui_modeh;	/* 0x78 mode high bits */
644  			__fs16	ui_spare;	/* 0x7A unused */
645  			__fs32	ui_trans;	/* 0x7c filesystem translator */
646  		} ui_hurd;
647  	} ui_u3;
648  };
649  
650  #define UFS_NXADDR  2            /* External addresses in inode. */
651  struct ufs2_inode {
652  	__fs16     ui_mode;        /*   0: IFMT, permissions; see below. */
653  	__fs16     ui_nlink;       /*   2: File link count. */
654  	__fs32     ui_uid;         /*   4: File owner. */
655  	__fs32     ui_gid;         /*   8: File group. */
656  	__fs32     ui_blksize;     /*  12: Inode blocksize. */
657  	__fs64     ui_size;        /*  16: File byte count. */
658  	__fs64     ui_blocks;      /*  24: Bytes actually held. */
659  	__fs64   ui_atime;       /*  32: Last access time. */
660  	__fs64   ui_mtime;       /*  40: Last modified time. */
661  	__fs64   ui_ctime;       /*  48: Last inode change time. */
662  	__fs64   ui_birthtime;   /*  56: Inode creation time. */
663  	__fs32     ui_mtimensec;   /*  64: Last modified time. */
664  	__fs32     ui_atimensec;   /*  68: Last access time. */
665  	__fs32     ui_ctimensec;   /*  72: Last inode change time. */
666  	__fs32     ui_birthnsec;   /*  76: Inode creation time. */
667  	__fs32     ui_gen;         /*  80: Generation number. */
668  	__fs32     ui_kernflags;   /*  84: Kernel flags. */
669  	__fs32     ui_flags;       /*  88: Status flags (chflags). */
670  	__fs32     ui_extsize;     /*  92: External attributes block. */
671  	__fs64     ui_extb[UFS_NXADDR];/*  96: External attributes block. */
672  	union {
673  		struct {
674  			__fs64     ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
675  			__fs64     ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/
676  		} ui_addr;
677  	__u8	ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
678  	} ui_u2;
679  	__fs64     ui_spare[3];    /* 232: Reserved; currently unused */
680  };
681  
682  
683  /* FreeBSD has these in sys/stat.h */
684  /* ui_flags that can be set by a file owner */
685  #define UFS_UF_SETTABLE   0x0000ffff
686  #define UFS_UF_NODUMP     0x00000001  /* do not dump */
687  #define UFS_UF_IMMUTABLE  0x00000002  /* immutable (can't "change") */
688  #define UFS_UF_APPEND     0x00000004  /* append-only */
689  #define UFS_UF_OPAQUE     0x00000008  /* directory is opaque (unionfs) */
690  #define UFS_UF_NOUNLINK   0x00000010  /* can't be removed or renamed */
691  /* ui_flags that only root can set */
692  #define UFS_SF_SETTABLE   0xffff0000
693  #define UFS_SF_ARCHIVED   0x00010000  /* archived */
694  #define UFS_SF_IMMUTABLE  0x00020000  /* immutable (can't "change") */
695  #define UFS_SF_APPEND     0x00040000  /* append-only */
696  #define UFS_SF_NOUNLINK   0x00100000  /* can't be removed or renamed */
697  
698  /*
699   * This structure is used for reading disk structures larger
700   * than the size of fragment.
701   */
702  struct ufs_buffer_head {
703  	__u64 fragment;			/* first fragment */
704  	__u64 count;				/* number of fragments */
705  	struct buffer_head * bh[UFS_MAXFRAG];	/* buffers */
706  };
707  
708  struct ufs_cg_private_info {
709  	struct ufs_buffer_head c_ubh;
710  	__u32	c_cgx;		/* number of cylidner group */
711  	__u16	c_ncyl;		/* number of cyl's this cg */
712  	__u16	c_niblk;	/* number of inode blocks this cg */
713  	__u32	c_ndblk;	/* number of data blocks this cg */
714  	__u32	c_rotor;	/* position of last used block */
715  	__u32	c_frotor;	/* position of last used frag */
716  	__u32	c_irotor;	/* position of last used inode */
717  	__u32	c_btotoff;	/* (__u32) block totals per cylinder */
718  	__u32	c_boff;		/* (short) free block positions */
719  	__u32	c_iusedoff;	/* (char) used inode map */
720  	__u32	c_freeoff;	/* (u_char) free block map */
721  	__u32	c_nextfreeoff;	/* (u_char) next available space */
722  	__u32	c_clustersumoff;/* (u_int32) counts of avail clusters */
723  	__u32	c_clusteroff;	/* (u_int8) free cluster map */
724  	__u32	c_nclusterblks;	/* number of clusters this cg */
725  };
726  
727  
728  struct ufs_sb_private_info {
729  	struct ufs_buffer_head s_ubh; /* buffer containing super block */
730  	struct ufs_csum_core cs_total;
731  	__u32	s_sblkno;	/* offset of super-blocks in filesys */
732  	__u32	s_cblkno;	/* offset of cg-block in filesys */
733  	__u32	s_iblkno;	/* offset of inode-blocks in filesys */
734  	__u32	s_dblkno;	/* offset of first data after cg */
735  	__u32	s_cgoffset;	/* cylinder group offset in cylinder */
736  	__u32	s_cgmask;	/* used to calc mod fs_ntrak */
737  	__u64	s_size;		/* number of blocks (fragments) in fs */
738  	__u64	s_dsize;	/* number of data blocks in fs */
739  	__u32	s_ncg;		/* number of cylinder groups */
740  	__u32	s_bsize;	/* size of basic blocks */
741  	__u32	s_fsize;	/* size of fragments */
742  	__u32	s_fpb;		/* fragments per block */
743  	__u32	s_minfree;	/* minimum percentage of free blocks */
744  	__u32	s_bmask;	/* `blkoff'' calc of blk offsets */
745  	__u32	s_fmask;	/* s_fsize mask */
746  	__u32	s_bshift;	/* `lblkno'' calc of logical blkno */
747  	__u32   s_fshift;	/* s_fsize shift */
748  	__u32	s_fpbshift;	/* fragments per block shift */
749  	__u32	s_fsbtodb;	/* fsbtodb and dbtofsb shift constant */
750  	__u32	s_sbsize;	/* actual size of super block */
751  	__u32   s_csmask;	/* csum block offset */
752  	__u32	s_csshift;	/* csum block number */
753  	__u32	s_nindir;	/* value of NINDIR */
754  	__u32	s_inopb;	/* value of INOPB */
755  	__u32	s_nspf;		/* value of NSPF */
756  	__u32	s_npsect;	/* # sectors/track including spares */
757  	__u32	s_interleave;	/* hardware sector interleave */
758  	__u32	s_trackskew;	/* sector 0 skew, per track */
759  	__u64	s_csaddr;	/* blk addr of cyl grp summary area */
760  	__u32	s_cssize;	/* size of cyl grp summary area */
761  	__u32	s_cgsize;	/* cylinder group size */
762  	__u32	s_ntrak;	/* tracks per cylinder */
763  	__u32	s_nsect;	/* sectors per track */
764  	__u32	s_spc;		/* sectors per cylinder */
765  	__u32	s_ipg;		/* inodes per cylinder group */
766  	__u32	s_fpg;		/* fragments per group */
767  	__u32	s_cpc;		/* cyl per cycle in postbl */
768  	__s32	s_contigsumsize;/* size of cluster summary array, 44bsd */
769  	__s64	s_qbmask;	/* ~usb_bmask */
770  	__s64	s_qfmask;	/* ~usb_fmask */
771  	__s32	s_postblformat;	/* format of positional layout tables */
772  	__s32	s_nrpos;	/* number of rotational positions */
773          __s32	s_postbloff;	/* (__s16) rotation block list head */
774  	__s32	s_rotbloff;	/* (__u8) blocks for each rotation */
775  
776  	__u32	s_fpbmask;	/* fragments per block mask */
777  	__u32	s_apb;		/* address per block */
778  	__u32	s_2apb;		/* address per block^2 */
779  	__u32	s_3apb;		/* address per block^3 */
780  	__u32	s_apbmask;	/* address per block mask */
781  	__u32	s_apbshift;	/* address per block shift */
782  	__u32	s_2apbshift;	/* address per block shift * 2 */
783  	__u32	s_3apbshift;	/* address per block shift * 3 */
784  	__u32	s_nspfshift;	/* number of sector per fragment shift */
785  	__u32	s_nspb;		/* number of sector per block */
786  	__u32	s_inopf;	/* inodes per fragment */
787  	__u32	s_sbbase;	/* offset of NeXTstep superblock */
788  	__u32	s_bpf;		/* bits per fragment */
789  	__u32	s_bpfshift;	/* bits per fragment shift*/
790  	__u32	s_bpfmask;	/* bits per fragment mask */
791  
792  	__u32	s_maxsymlinklen;/* upper limit on fast symlinks' size */
793  	__s32	fs_magic;       /* filesystem magic */
794  	unsigned int s_dirblksize;
795  	__u64   s_root_blocks;
796  	__u64	s_time_to_space;
797  	__u64	s_space_to_time;
798  };
799  
800  /*
801   * Sizes of this structures are:
802   *	ufs_super_block_first	512
803   *	ufs_super_block_second	512
804   *	ufs_super_block_third	356
805   */
806  struct ufs_super_block_first {
807  	union {
808  		struct {
809  			__fs32	fs_link;	/* UNUSED */
810  		} fs_42;
811  		struct {
812  			__fs32	fs_state;	/* file system state flag */
813  		} fs_sun;
814  	} fs_u0;
815  	__fs32	fs_rlink;
816  	__fs32	fs_sblkno;
817  	__fs32	fs_cblkno;
818  	__fs32	fs_iblkno;
819  	__fs32	fs_dblkno;
820  	__fs32	fs_cgoffset;
821  	__fs32	fs_cgmask;
822  	__fs32	fs_time;
823  	__fs32	fs_size;
824  	__fs32	fs_dsize;
825  	__fs32	fs_ncg;
826  	__fs32	fs_bsize;
827  	__fs32	fs_fsize;
828  	__fs32	fs_frag;
829  	__fs32	fs_minfree;
830  	__fs32	fs_rotdelay;
831  	__fs32	fs_rps;
832  	__fs32	fs_bmask;
833  	__fs32	fs_fmask;
834  	__fs32	fs_bshift;
835  	__fs32	fs_fshift;
836  	__fs32	fs_maxcontig;
837  	__fs32	fs_maxbpg;
838  	__fs32	fs_fragshift;
839  	__fs32	fs_fsbtodb;
840  	__fs32	fs_sbsize;
841  	__fs32	fs_csmask;
842  	__fs32	fs_csshift;
843  	__fs32	fs_nindir;
844  	__fs32	fs_inopb;
845  	__fs32	fs_nspf;
846  	__fs32	fs_optim;
847  	union {
848  		struct {
849  			__fs32	fs_npsect;
850  		} fs_sun;
851  		struct {
852  			__fs32	fs_state;
853  		} fs_sunx86;
854  	} fs_u1;
855  	__fs32	fs_interleave;
856  	__fs32	fs_trackskew;
857  	__fs32	fs_id[2];
858  	__fs32	fs_csaddr;
859  	__fs32	fs_cssize;
860  	__fs32	fs_cgsize;
861  	__fs32	fs_ntrak;
862  	__fs32	fs_nsect;
863  	__fs32	fs_spc;
864  	__fs32	fs_ncyl;
865  	__fs32	fs_cpg;
866  	__fs32	fs_ipg;
867  	__fs32	fs_fpg;
868  	struct ufs_csum fs_cstotal;
869  	__s8	fs_fmod;
870  	__s8	fs_clean;
871  	__s8	fs_ronly;
872  	__s8	fs_flags;
873  	__s8	fs_fsmnt[UFS_MAXMNTLEN - 212];
874  
875  };
876  
877  struct ufs_super_block_second {
878  	union {
879  		struct {
880  			__s8	fs_fsmnt[212];
881  			__fs32	fs_cgrotor;
882  			__fs32	fs_csp[UFS_MAXCSBUFS];
883  			__fs32	fs_maxcluster;
884  			__fs32	fs_cpc;
885  			__fs16	fs_opostbl[82];
886  		} fs_u1;
887  		struct {
888  			__s8  fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212];
889  			__u8   fs_volname[UFS2_MAXVOLLEN];
890  			__fs64  fs_swuid;
891  			__fs32  fs_pad;
892  			__fs32   fs_cgrotor;
893  			__fs32   fs_ocsp[UFS2_NOCSPTRS];
894  			__fs32   fs_contigdirs;
895  			__fs32   fs_csp;
896  			__fs32   fs_maxcluster;
897  			__fs32   fs_active;
898  			__fs32   fs_old_cpc;
899  			__fs32   fs_maxbsize;
900  			__fs64   fs_sparecon64[17];
901  			__fs64   fs_sblockloc;
902  			__fs64	cs_ndir;
903  			__fs64	cs_nbfree;
904  		} fs_u2;
905  	} fs_un;
906  };
907  
908  struct ufs_super_block_third {
909  	union {
910  		struct {
911  			__fs16	fs_opostbl[46];
912  		} fs_u1;
913  		struct {
914  			__fs64	cs_nifree;	/* number of free inodes */
915  			__fs64	cs_nffree;	/* number of free frags */
916  			__fs64   cs_numclusters;	/* number of free clusters */
917  			__fs64   cs_spare[3];	/* future expansion */
918  			struct  ufs_timeval    fs_time;		/* last time written */
919  			__fs64    fs_size;		/* number of blocks in fs */
920  			__fs64    fs_dsize;	/* number of data blocks in fs */
921  			__fs64   fs_csaddr;	/* blk addr of cyl grp summary area */
922  			__fs64    fs_pendingblocks;/* blocks in process of being freed */
923  			__fs32    fs_pendinginodes;/*inodes in process of being freed */
924  		} __attribute__ ((packed)) fs_u2;
925  	} fs_un1;
926  	union {
927  		struct {
928  			__fs32	fs_sparecon[53];/* reserved for future constants */
929  			__fs32	fs_reclaim;
930  			__fs32	fs_sparecon2[1];
931  			__fs32	fs_state;	/* file system state time stamp */
932  			__fs32	fs_qbmask[2];	/* ~usb_bmask */
933  			__fs32	fs_qfmask[2];	/* ~usb_fmask */
934  		} fs_sun;
935  		struct {
936  			__fs32	fs_sparecon[53];/* reserved for future constants */
937  			__fs32	fs_reclaim;
938  			__fs32	fs_sparecon2[1];
939  			__fs32	fs_npsect;	/* # sectors/track including spares */
940  			__fs32	fs_qbmask[2];	/* ~usb_bmask */
941  			__fs32	fs_qfmask[2];	/* ~usb_fmask */
942  		} fs_sunx86;
943  		struct {
944  			__fs32	fs_sparecon[50];/* reserved for future constants */
945  			__fs32	fs_contigsumsize;/* size of cluster summary array */
946  			__fs32	fs_maxsymlinklen;/* max length of an internal symlink */
947  			__fs32	fs_inodefmt;	/* format of on-disk inodes */
948  			__fs32	fs_maxfilesize[2];	/* max representable file size */
949  			__fs32	fs_qbmask[2];	/* ~usb_bmask */
950  			__fs32	fs_qfmask[2];	/* ~usb_fmask */
951  			__fs32	fs_state;	/* file system state time stamp */
952  		} fs_44;
953  	} fs_un2;
954  	__fs32	fs_postblformat;
955  	__fs32	fs_nrpos;
956  	__fs32	fs_postbloff;
957  	__fs32	fs_rotbloff;
958  	__fs32	fs_magic;
959  	__u8	fs_space[1];
960  };
961  
962  #endif /* __LINUX_UFS_FS_H */
963