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-rw-r--r--include/linux/ufs_fs.h296
1 files changed, 216 insertions, 80 deletions
diff --git a/include/linux/ufs_fs.h b/include/linux/ufs_fs.h
index b59cd5f90..70740489c 100644
--- a/include/linux/ufs_fs.h
+++ b/include/linux/ufs_fs.h
@@ -21,10 +21,6 @@
#ifndef __LINUX_UFS_FS_H
#define __LINUX_UFS_FS_H
-#undef UFS_HEAVY_DEBUG
-/*#define UFS_HEAVY_DEBUG 1*/
-/* Uncomment the line above when hacking ufs code */
-
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/time.h>
@@ -35,11 +31,15 @@
#define UFS_SBLOCK 8192
#define UFS_SBSIZE 8192
+#define SECTOR_SIZE 512
+#define SECTOR_BITS 9
#define UFS_MAGIC 0x00011954
#define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */
-#define UFS_FSIZE 1024
-#define UFS_BSIZE 8192
+#define UFS_BSIZE 8192
+#define UFS_MINBSIZE 4096
+#define UFS_FSIZE 1024
+#define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE)
#define UFS_NDADDR 12
#define UFS_NINDIR 3
@@ -48,7 +48,13 @@
#define UFS_DIND_BLOCK (UFS_NDADDR + 1)
#define UFS_TIND_BLOCK (UFS_NDADDR + 2)
+#define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
+#define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
+#define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
+#define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
+
#define UFS_ROOTINO 2
+#define UFS_FIRST_INO (UFS_ROOTINO + 1)
#define UFS_USEEFT ((__u16)65535)
@@ -87,62 +93,109 @@
#define UFS_HURD 0x00000130
#define UFS_SUN 0x00000200
#define UFS_NEXT 0x00000400
-/* we preserve distinction in flavor identification even without difference,
- * because yet-to-be-supported features may introduce difference in the future
- */
-/* last but not least, debug flags */
-#define UFS_DEBUG 0x01000000
-#define UFS_DEBUG_INODE 0x02000000
-#define UFS_DEBUG_NAMEI 0x04000000
-#define UFS_DEBUG_LINKS 0x08000000
-
-#ifdef UFS_HEAVY_DEBUG
-# define UFS_DEBUG_INITIAL UFS_DEBUG
-#else
-# define UFS_DEBUG_INITIAL 0
-#endif
/* fs_inodefmt options */
#define UFS_42INODEFMT -1
#define UFS_44INODEFMT 2
-#define UFS_ADDR_PER_BLOCK(sb) ((sb)->u.ufs_sb.s_bsize >> 2)
-#define UFS_ADDR_PER_BLOCK_BITS(sb) ((sb)->u.ufs_sb.s_bshift - 2)
+/*
+ * MINFREE gives the minimum acceptable percentage of file system
+ * blocks which may be free. If the freelist drops below this level
+ * only the superuser may continue to allocate blocks. This may
+ * be set to 0 if no reserve of free blocks is deemed necessary,
+ * however throughput drops by fifty percent if the file system
+ * is run at between 95% and 100% full; thus the minimum default
+ * value of fs_minfree is 5%. However, to get good clustering
+ * performance, 10% is a better choice. hence we use 10% as our
+ * default value. With 10% free space, fragmentation is not a
+ * problem, so we choose to optimize for time.
+ */
+#define UFS_MINFREE 5
+#define UFS_DEFAULTOPT UFS_OPTTIME
+
+/*
+ * Turn file system block numbers into disk block addresses.
+ * This maps file system blocks to device size blocks.
+ */
+#define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb)
+#define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb)
-/* Test if the inode number is valid. */
-#define ufs_ino_ok(inode) ((inode->i_ino < 2) && \
- (inode->i_ino > (inode->i_sb->u.ufs_sb.s_ncg * inode->i_sb->u.ufs_sb.s_ipg - 1)))
+/*
+ * Cylinder group macros to locate things in cylinder groups.
+ * They calc file system addresses of cylinder group data structures.
+ */
+#define ufs_cgbase(c) (uspi->s_fpg * (c))
+#define ufs_cgstart(c) (ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask))
+#define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */
+#define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */
+#define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */
+#define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */
-/* Convert (sb,cg) to the first physical block number for that cg. */
-#define ufs_cgstart(sb, cg) \
- (((sb)->u.ufs_sb.s_fpg * (cg)) + (sb)->u.ufs_sb.s_cgoffset * ((cg) & ~((sb)->u.ufs_sb.s_cgmask)))
+/*
+ * Macros for handling inode numbers:
+ * inode number to file system block offset.
+ * inode number to cylinder group number.
+ * inode number to file system block address.
+ */
+#define ufs_inotocg(x) ((x) / uspi->s_ipg)
+#define ufs_inotocgoff(x) ((x) % uspi->s_ipg)
+#define ufs_inotofsba(x) (ufs_cgimin(ufs_inotocg(x)) + ufs_inotocgoff(x) / uspi->s_inopf)
+#define ufs_inotofsbo(x) ((x) % uspi->s_inopf)
-/* Convert (sb,cg) to the first phys. block number for inodes in that cg. */
-#define ufs_cgimin(sb, cg) (ufs_cgstart((sb), (cg)) + (sb)->u.ufs_sb.s_iblkno)
-#define ufs_cgdmin(sb, cg) (ufs_cgstart((sb), (cg)) + (sb)->u.ufs_sb.s_dblkno)
+/*
+ * Give cylinder group number for a file system block.
+ * Give cylinder group block number for a file system block.
+ */
+#define ufs_dtog(d) ((d) / uspi->s_fpg)
+#define ufs_dtogd(d) ((d) % uspi->s_fpg)
-/* Convert an inode number to a cg number. */
-/* XXX - this can be optimized if s_ipg is a power of 2. */
-#define ufs_ino2cg(inode) ((inode)->i_ino/(inode)->i_sb->u.ufs_sb.s_ipg)
+/*
+ * Compute the cylinder and rotational position of a cyl block addr.
+ */
+#define ufs_cbtocylno(bno) \
+ ((bno) * uspi->s_nspf / uspi->s_spc)
+#define ufs_cbtorpos(bno) \
+ ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
+ * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
+ % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
+ * uspi->s_nrpos) / uspi->s_npsect)
-/* current filesystem state; method depends on flags */
-#define UFS_STATE(usb) \
- ( ((flags&UFS_ST_MASK) == UFS_ST_OLD) \
- ? (usb)->fs_u.fs_sun.fs_state /* old normal way */ \
- : (usb)->fs_u.fs_44.fs_state /* 4.4BSD way */ )
+/*
+ * The following macros optimize certain frequently calculated
+ * quantities by using shifts and masks in place of divisions
+ * modulos and multiplications.
+ */
+#define ufs_blkoff(loc) ((loc) & uspi->s_qbmask)
+#define ufs_fragoff(loc) ((loc) & uspi->s_qfmask)
+#define ufs_lblktosize(blk) ((blk) << uspi->s_bshift)
+#define ufs_lblkno(loc) ((loc) >> uspi->s_bshift)
+#define ufs_numfrags(loc) ((loc) >> uspi->s_fshift)
+#define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask)
+#define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask)
+#define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift)
+#define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift)
+#define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask)
+#define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask)
#define UFS_MAXNAMLEN 255
+#define UFS_MAXMNTLEN 512
+#define UFS_MAXCSBUFS 31
+#define UFS_LINK_MAX EXT2_LINK_MAX
-#define ufs_lbn(sb, block) ((block) >> (sb)->u.ufs_sb.s_lshift)
-#define ufs_boff(sb, block) ((block) & ~((sb)->u.ufs_sb.s_lmask))
-#define ufs_dbn(sb, block, boff) ((block) + ufs_boff((sb), (boff)))
+/*
+ * UFS_DIR_PAD defines the directory entries boundaries
+ * (must be a multiple of 4)
+ */
+#define UFS_DIR_PAD 4
+#define UFS_DIR_ROUND (UFS_DIR_PAD - 1)
+#define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)
struct ufs_timeval {
__s32 tv_sec;
__s32 tv_usec;
};
-struct ufs_direct {
+struct ufs_dir_entry {
__u32 d_ino; /* inode number of this entry */
__u16 d_reclen; /* length of this entry */
union {
@@ -155,9 +208,6 @@ struct ufs_direct {
__u8 d_name[UFS_MAXNAMLEN + 1]; /* file name */
};
-#define MAXMNTLEN 512
-#define MAXCSBUFS 32
-
struct ufs_csum {
__u32 cs_ndir; /* number of directories */
__u32 cs_nbfree; /* number of free blocks */
@@ -168,7 +218,7 @@ struct ufs_csum {
/*
* This is the actual superblock, as it is laid out on the disk.
*/
-struct ufs_superblock {
+struct ufs_super_block {
__u32 fs_link; /* UNUSED */
__u32 fs_rlink; /* UNUSED */
__u32 fs_sblkno; /* addr of super-block in filesys */
@@ -237,15 +287,18 @@ struct ufs_superblock {
__u8 fs_clean; /* file system is clean flag */
__u8 fs_ronly; /* mounted read-only flag */
__u8 fs_flags; /* currently unused flag */
- __u8 fs_fsmnt[MAXMNTLEN]; /* name mounted on */
+ __u8 fs_fsmnt[UFS_MAXMNTLEN]; /* name mounted on */
/* these fields retain the current block allocation info */
__u32 fs_cgrotor; /* last cg searched */
- __u32 fs_csp[MAXCSBUFS]; /* list of fs_cs info buffers */
+ __u32 fs_csp[UFS_MAXCSBUFS]; /* list of fs_cs info buffers */
+ __u32 fs_maxcluster;
__u32 fs_cpc; /* cyl per cycle in postbl */
__u16 fs_opostbl[16][8]; /* old rotation block list head */
union {
struct {
- __s32 fs_sparecon[55];/* reserved for future constants */
+ __s32 fs_sparecon[53];/* reserved for future constants */
+ __s32 fs_reclaim;
+ __s32 fs_sparecon2[1];
__s32 fs_state; /* file system state time stamp */
__u32 fs_qbmask[2]; /* ~usb_bmask */
__u32 fs_qfmask[2]; /* ~usb_fmask */
@@ -255,7 +308,7 @@ struct ufs_superblock {
__s32 fs_contigsumsize;/* size of cluster summary array */
__s32 fs_maxsymlinklen;/* max length of an internal symlink */
__s32 fs_inodefmt; /* format of on-disk inodes */
- __u32 fs_maxfilesize[2];/* max representable file size */
+ __u32 fs_maxfilesize[2]; /* max representable file size */
__u32 fs_qbmask[2]; /* ~usb_bmask */
__u32 fs_qfmask[2]; /* ~usb_fmask */
__s32 fs_state; /* file system state time stamp */
@@ -270,6 +323,59 @@ struct ufs_superblock {
};
/*
+ * Preference for optimization.
+ */
+#define UFS_OPTTIME 0 /* minimize allocation time */
+#define UFS_OPTSPACE 1 /* minimize disk fragmentation */
+
+/*
+ * Rotational layout table format types
+ */
+#define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */
+#define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */
+
+/*
+ * Convert cylinder group to base address of its global summary info.
+ */
+#define fs_cs(indx) \
+ u.ufs_sb.s_csp[(indx) >> uspi->s_csshift][(indx) & ~uspi->s_csmask]
+
+/*
+ * Cylinder group block for a file system.
+ *
+ * Writable fields in the cylinder group are protected by the associated
+ * super block lock fs->fs_lock.
+ */
+#define CG_MAGIC 0x090255
+#define ufs_cg_chkmagic(ucg) (SWAB32((ucg)->cg_magic) == CG_MAGIC)
+
+/*
+ * size of this structure is 172 B
+ */
+struct ufs_cylinder_group {
+ __u32 cg_link; /* linked list of cyl groups */
+ __u32 cg_magic; /* magic number */
+ __u32 cg_time; /* time last written */
+ __u32 cg_cgx; /* we are the cgx'th cylinder group */
+ __u16 cg_ncyl; /* number of cyl's this cg */
+ __u16 cg_niblk; /* number of inode blocks this cg */
+ __u32 cg_ndblk; /* number of data blocks this cg */
+ struct ufs_csum cg_cs; /* cylinder summary information */
+ __u32 cg_rotor; /* position of last used block */
+ __u32 cg_frotor; /* position of last used frag */
+ __u32 cg_irotor; /* position of last used inode */
+ __u32 cg_frsum[UFS_MAXFRAG]; /* counts of available frags */
+ __u32 cg_btotoff; /* (__u32) block totals per cylinder */
+ __u32 cg_boff; /* (short) free block positions */
+ __u32 cg_iusedoff; /* (char) used inode map */
+ __u32 cg_freeoff; /* (u_char) free block map */
+ __u32 cg_nextfreeoff; /* (u_char) next available space */
+ __u32 cg_sparecon[16]; /* reserved for future use */
+ __u8 cg_space[1]; /* space for cylinder group maps */
+/* actually longer */
+};
+
+/*
* structure of an on-disk inode
*/
struct ufs_inode {
@@ -277,11 +383,11 @@ struct ufs_inode {
__u16 ui_nlink; /* 0x2 */
union {
struct {
- __u16 suid; /* 0x4 */
- __u16 sgid; /* 0x6 */
+ __u16 ui_suid; /* 0x4 */
+ __u16 ui_sgid; /* 0x6 */
} oldids;
- __u32 inumber; /* 0x4 lsf: inode number */
- __u32 author; /* 0x4 GNU HURD: author */
+ __u32 ui_inumber; /* 0x4 lsf: inode number */
+ __u32 ui_author; /* 0x4 GNU HURD: author */
} ui_u1;
__u64 ui_size; /* 0x8 */
struct ufs_timeval ui_atime; /* 0x10 access */
@@ -333,43 +439,73 @@ struct ufs_inode {
#define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */
#define UFS_SF_APPEND 0x00040000 /* append-only */
#define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */
-
-
-#ifdef __KERNEL__
-/*
- * Function prototypes
- */
-
-/* ufs_inode.c */
-extern int ufs_bmap (struct inode *, int);
-extern void ufs_read_inode(struct inode * inode);
-extern void ufs_put_inode(struct inode * inode);
-extern void ufs_print_inode (struct inode *);
+#ifdef __KERNEL__
-/* ufs_namei.c */
-extern int ufs_lookup (struct inode *, struct dentry *);
+/* acl.c */
+extern int ufs_permission (struct inode *, int);
-/* ufs_super.c */
-extern void ufs_warning (struct super_block *, const char *, const char *, ...)
- __attribute__ ((format (printf, 3, 4)));
-extern int init_ufs_fs(void);
+/* balloc.c */
+extern void ufs_free_fragments (struct inode *, unsigned, unsigned);
+extern void ufs_free_blocks (struct inode *, unsigned, unsigned);
+extern unsigned ufs_new_fragments (struct inode *, u32 *, unsigned, unsigned, unsigned, int *);
-/*
- * Inodes and files operations
- */
+/* cylinder.c */
+extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
+extern void ufs_put_cylinder (struct super_block *, unsigned);
-/* ufs_dir.c */
+/* dir.c */
extern struct inode_operations ufs_dir_inode_operations;
extern struct file_operations ufs_dir_operations;
+extern int ufs_check_dir_entry (const char *, struct inode *, struct ufs_dir_entry *, struct buffer_head *, unsigned long);
-/* ufs_file.c */
+/* file.c */
extern struct inode_operations ufs_file_inode_operations;
extern struct file_operations ufs_file_operations;
-/* ufs_symlink.c */
+/* ialloc.c */
+extern void ufs_free_inode (struct inode *inode);
+extern struct inode * ufs_new_inode (const struct inode *, int, int *);
+
+/* inode.c */
+extern int ufs_bmap (struct inode *, int);
+extern void ufs_read_inode (struct inode *);
+extern void ufs_put_inode (struct inode *);
+extern void ufs_write_inode (struct inode *);
+extern int ufs_sync_inode (struct inode *);
+extern void ufs_print_inode (struct inode *);
+extern void ufs_write_inode (struct inode *);
+extern void ufs_delete_inode (struct inode *);
+extern struct buffer_head * ufs_getfrag (struct inode *, unsigned, int, int *);
+extern struct buffer_head * ufs_bread (struct inode *, unsigned, int, int *);
+
+/* namei.c */
+extern int ufs_lookup (struct inode *, struct dentry *);
+extern int ufs_mkdir(struct inode *, struct dentry *, int);
+extern int ufs_rmdir (struct inode *, struct dentry *);
+extern int ufs_unlink (struct inode *, struct dentry *);
+extern int ufs_create (struct inode *, struct dentry *, int);
+extern int ufs_rename (struct inode *, struct dentry *, struct inode *, struct dentry *);
+extern int ufs_mknod (struct inode *, struct dentry *, int, int);
+extern int ufs_symlink (struct inode *, struct dentry *, const char *);
+extern int ufs_link (struct dentry *, struct inode *, struct dentry *);
+
+/* super.c */
+extern struct super_operations ufs_super_ops;
+extern struct file_system_type ufs_fs_type;
+extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
+extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
+extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
+
+extern int init_ufs_fs(void);
+extern void ufs_write_super (struct super_block *);
+extern void ufs_print_cylinder_stuff(struct ufs_cylinder_group *, __u32);
+
+/* symlink.c */
extern struct inode_operations ufs_symlink_inode_operations;
-extern struct file_operations ufs_symlink_operations;
+
+/* truncate.c */
+extern void ufs_truncate (struct inode *);
#endif /* __KERNEL__ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 19:48:20 +0000