/* * linux/fs/ufs/super.c * * Copyright (C) 1998 * Daniel Pirkl * Charles University, Faculty of Mathematics and Physics */ /* Derived from * * linux/fs/ext2/super.c * * Copyright (C) 1992, 1993, 1994, 1995 * Remy Card (card@masi.ibp.fr) * Laboratoire MASI - Institut Blaise Pascal * Universite Pierre et Marie Curie (Paris VI) * * from * * linux/fs/minix/inode.c * * Copyright (C) 1991, 1992 Linus Torvalds * * Big-endian to little-endian byte-swapping/bitmaps by * David S. Miller (davem@caip.rutgers.edu), 1995 */ /* * Inspired by * * linux/fs/ufs/super.c * * Copyright (C) 1996 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) * Laboratory for Computer Science Research Computing Facility * Rutgers, The State University of New Jersey * * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be) * * Kernel module support added on 96/04/26 by * Stefan Reinauer * * Module usage counts added on 96/04/29 by * Gertjan van Wingerde * * Clean swab support on 19970406 by * Francois-Rene Rideau * * 4.4BSD (FreeBSD) support added on February 1st 1998 by * Niels Kristian Bech Jensen partially based * on code by Martin von Loewis . * * NeXTstep support added on February 5th 1998 by * Niels Kristian Bech Jensen . * * write support Daniel Pirkl 1998 * * HP/UX hfs filesystem support added by * Martin K. Petersen , August 1999 * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "swab.h" #include "util.h" #undef UFS_SUPER_DEBUG #undef UFS_SUPER_DEBUG_MORE #ifdef UFS_SUPER_DEBUG #define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x; #else #define UFSD(x) #endif #ifdef UFS_SUPER_DEBUG_MORE /* * Print contents of ufs_super_block, useful for debugging */ void ufs_print_super_stuff(struct ufs_super_block_first * usb1, struct ufs_super_block_second * usb2, struct ufs_super_block_third * usb3, unsigned swab) { printk("ufs_print_super_stuff\n"); printk("size of usb: %u\n", sizeof(struct ufs_super_block)); printk(" magic: 0x%x\n", SWAB32(usb3->fs_magic)); printk(" sblkno: %u\n", SWAB32(usb1->fs_sblkno)); printk(" cblkno: %u\n", SWAB32(usb1->fs_cblkno)); printk(" iblkno: %u\n", SWAB32(usb1->fs_iblkno)); printk(" dblkno: %u\n", SWAB32(usb1->fs_dblkno)); printk(" cgoffset: %u\n", SWAB32(usb1->fs_cgoffset)); printk(" ~cgmask: 0x%x\n", ~SWAB32(usb1->fs_cgmask)); printk(" size: %u\n", SWAB32(usb1->fs_size)); printk(" dsize: %u\n", SWAB32(usb1->fs_dsize)); printk(" ncg: %u\n", SWAB32(usb1->fs_ncg)); printk(" bsize: %u\n", SWAB32(usb1->fs_bsize)); printk(" fsize: %u\n", SWAB32(usb1->fs_fsize)); printk(" frag: %u\n", SWAB32(usb1->fs_frag)); printk(" fragshift: %u\n", SWAB32(usb1->fs_fragshift)); printk(" ~fmask: %u\n", ~SWAB32(usb1->fs_fmask)); printk(" fshift: %u\n", SWAB32(usb1->fs_fshift)); printk(" sbsize: %u\n", SWAB32(usb1->fs_sbsize)); printk(" spc: %u\n", SWAB32(usb1->fs_spc)); printk(" cpg: %u\n", SWAB32(usb1->fs_cpg)); printk(" ipg: %u\n", SWAB32(usb1->fs_ipg)); printk(" fpg: %u\n", SWAB32(usb1->fs_fpg)); printk(" csaddr: %u\n", SWAB32(usb1->fs_csaddr)); printk(" cssize: %u\n", SWAB32(usb1->fs_cssize)); printk(" cgsize: %u\n", SWAB32(usb1->fs_cgsize)); printk(" fstodb: %u\n", SWAB32(usb1->fs_fsbtodb)); printk(" contigsumsize: %d\n", SWAB32(usb3->fs_u2.fs_44.fs_contigsumsize)); printk(" postblformat: %u\n", SWAB32(usb3->fs_postblformat)); printk(" nrpos: %u\n", SWAB32(usb3->fs_nrpos)); printk(" ndir %u\n", SWAB32(usb1->fs_cstotal.cs_ndir)); printk(" nifree %u\n", SWAB32(usb1->fs_cstotal.cs_nifree)); printk(" nbfree %u\n", SWAB32(usb1->fs_cstotal.cs_nbfree)); printk(" nffree %u\n", SWAB32(usb1->fs_cstotal.cs_nffree)); printk("\n"); } /* * Print contents of ufs_cylinder_group, useful for debugging */ void ufs_print_cylinder_stuff(struct ufs_cylinder_group *cg, unsigned swab) { printk("\nufs_print_cylinder_stuff\n"); printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group)); printk(" magic: %x\n", SWAB32(cg->cg_magic)); printk(" time: %u\n", SWAB32(cg->cg_time)); printk(" cgx: %u\n", SWAB32(cg->cg_cgx)); printk(" ncyl: %u\n", SWAB16(cg->cg_ncyl)); printk(" niblk: %u\n", SWAB16(cg->cg_niblk)); printk(" ndblk: %u\n", SWAB32(cg->cg_ndblk)); printk(" cs_ndir: %u\n", SWAB32(cg->cg_cs.cs_ndir)); printk(" cs_nbfree: %u\n", SWAB32(cg->cg_cs.cs_nbfree)); printk(" cs_nifree: %u\n", SWAB32(cg->cg_cs.cs_nifree)); printk(" cs_nffree: %u\n", SWAB32(cg->cg_cs.cs_nffree)); printk(" rotor: %u\n", SWAB32(cg->cg_rotor)); printk(" frotor: %u\n", SWAB32(cg->cg_frotor)); printk(" irotor: %u\n", SWAB32(cg->cg_irotor)); printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", SWAB32(cg->cg_frsum[0]), SWAB32(cg->cg_frsum[1]), SWAB32(cg->cg_frsum[2]), SWAB32(cg->cg_frsum[3]), SWAB32(cg->cg_frsum[4]), SWAB32(cg->cg_frsum[5]), SWAB32(cg->cg_frsum[6]), SWAB32(cg->cg_frsum[7])); printk(" btotoff: %u\n", SWAB32(cg->cg_btotoff)); printk(" boff: %u\n", SWAB32(cg->cg_boff)); printk(" iuseoff: %u\n", SWAB32(cg->cg_iusedoff)); printk(" freeoff: %u\n", SWAB32(cg->cg_freeoff)); printk(" nextfreeoff: %u\n", SWAB32(cg->cg_nextfreeoff)); printk(" clustersumoff %u\n", SWAB32(cg->cg_u.cg_44.cg_clustersumoff)); printk(" clusteroff %u\n", SWAB32(cg->cg_u.cg_44.cg_clusteroff)); printk(" nclusterblks %u\n", SWAB32(cg->cg_u.cg_44.cg_nclusterblks)); printk("\n"); } #endif /* UFS_SUPER_DEBUG_MORE */ static struct super_operations ufs_super_ops; static char error_buf[1024]; void ufs_error (struct super_block * sb, const char * function, const char * fmt, ...) { struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; va_list args; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first(USPI_UBH); if (!(sb->s_flags & MS_RDONLY)) { usb1->fs_clean = UFS_FSBAD; ubh_mark_buffer_dirty(USPI_UBH); sb->s_dirt = 1; sb->s_flags |= MS_RDONLY; } va_start (args, fmt); vsprintf (error_buf, fmt, args); va_end (args); switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_ONERROR) { case UFS_MOUNT_ONERROR_PANIC: panic ("UFS-fs panic (device %s): %s: %s\n", kdevname(sb->s_dev), function, error_buf); case UFS_MOUNT_ONERROR_LOCK: case UFS_MOUNT_ONERROR_UMOUNT: case UFS_MOUNT_ONERROR_REPAIR: printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n", kdevname(sb->s_dev), function, error_buf); } } void ufs_panic (struct super_block * sb, const char * function, const char * fmt, ...) { struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; va_list args; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first(USPI_UBH); if (!(sb->s_flags & MS_RDONLY)) { usb1->fs_clean = UFS_FSBAD; ubh_mark_buffer_dirty(USPI_UBH); sb->s_dirt = 1; } va_start (args, fmt); vsprintf (error_buf, fmt, args); va_end (args); /* this is to prevent panic from syncing this filesystem */ if (sb->s_lock) sb->s_lock = 0; sb->s_flags |= MS_RDONLY; printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", kdevname(sb->s_dev), function, error_buf); } void ufs_warning (struct super_block * sb, const char * function, const char * fmt, ...) { va_list args; va_start (args, fmt); vsprintf (error_buf, fmt, args); va_end (args); printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n", kdevname(sb->s_dev), function, error_buf); } static int ufs_parse_options (char * options, unsigned * mount_options) { char * this_char; char * value; UFSD(("ENTER\n")) if (!options) return 1; for (this_char = strtok (options, ","); this_char != NULL; this_char = strtok (NULL, ",")) { if ((value = strchr (this_char, '=')) != NULL) *value++ = 0; if (!strcmp (this_char, "ufstype")) { ufs_clear_opt (*mount_options, UFSTYPE); if (!strcmp (value, "old")) ufs_set_opt (*mount_options, UFSTYPE_OLD); else if (!strcmp (value, "sun")) ufs_set_opt (*mount_options, UFSTYPE_SUN); else if (!strcmp (value, "44bsd")) ufs_set_opt (*mount_options, UFSTYPE_44BSD); else if (!strcmp (value, "nextstep")) ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); else if (!strcmp (value, "nextstep-cd")) ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); else if (!strcmp (value, "openstep")) ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); else if (!strcmp (value, "sunx86")) ufs_set_opt (*mount_options, UFSTYPE_SUNx86); else if (!strcmp (value, "hp")) ufs_set_opt (*mount_options, UFSTYPE_HP); else { printk ("UFS-fs: Invalid type option: %s\n", value); return 0; } } else if (!strcmp (this_char, "onerror")) { ufs_clear_opt (*mount_options, ONERROR); if (!strcmp (value, "panic")) ufs_set_opt (*mount_options, ONERROR_PANIC); else if (!strcmp (value, "lock")) ufs_set_opt (*mount_options, ONERROR_LOCK); else if (!strcmp (value, "umount")) ufs_set_opt (*mount_options, ONERROR_UMOUNT); else if (!strcmp (value, "repair")) { printk("UFS-fs: Unable to do repair on error, " "will lock lock instead \n"); ufs_set_opt (*mount_options, ONERROR_REPAIR); } else { printk ("UFS-fs: Invalid action onerror: %s\n", value); return 0; } } else { printk("UFS-fs: Invalid option: %s\n", this_char); return 0; } } return 1; } /* * Read on-disk structures associated with cylinder groups */ int ufs_read_cylinder_structures (struct super_block * sb) { struct ufs_sb_private_info * uspi; struct ufs_buffer_head * ubh; unsigned char * base, * space; unsigned size, blks, i; unsigned swab; UFSD(("ENTER\n")) uspi = sb->u.ufs_sb.s_uspi; swab = sb->u.ufs_sb.s_swab; /* * Read cs structures from (usually) first data block * on the device. */ size = uspi->s_cssize; blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; base = space = kmalloc(size, GFP_KERNEL); if (!base) goto failed; for (i = 0; i < blks; i += uspi->s_fpb) { size = uspi->s_bsize; if (i + uspi->s_fpb > blks) size = (blks - i) * uspi->s_fsize; ubh = ubh_bread(sb->s_dev, uspi->s_csaddr + i, size); if (!ubh) goto failed; ubh_ubhcpymem (space, ubh, size); sb->u.ufs_sb.s_csp[ufs_fragstoblks(i)] = (struct ufs_csum *)space; space += size; ubh_brelse (ubh); ubh = NULL; } /* * Read cylinder group (we read only first fragment from block * at this time) and prepare internal data structures for cg caching. */ if (!(sb->u.ufs_sb.s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) goto failed; for (i = 0; i < uspi->s_ncg; i++) sb->u.ufs_sb.s_ucg[i] = NULL; for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { sb->u.ufs_sb.s_ucpi[i] = NULL; sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY; } for (i = 0; i < uspi->s_ncg; i++) { UFSD(("read cg %u\n", i)) if (!(sb->u.ufs_sb.s_ucg[i] = bread (sb->s_dev, ufs_cgcmin(i), sb->s_blocksize))) goto failed; if (!ufs_cg_chkmagic ((struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data)) goto failed; #ifdef UFS_SUPER_DEBUG_MORE ufs_print_cylinder_stuff((struct ufs_cylinder_group *) sb->u.ufs_sb.s_ucg[i]->b_data, swab); #endif } for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { if (!(sb->u.ufs_sb.s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) goto failed; sb->u.ufs_sb.s_cgno[i] = UFS_CGNO_EMPTY; } sb->u.ufs_sb.s_cg_loaded = 0; UFSD(("EXIT\n")) return 1; failed: if (base) kfree (base); if (sb->u.ufs_sb.s_ucg) { for (i = 0; i < uspi->s_ncg; i++) if (sb->u.ufs_sb.s_ucg[i]) brelse (sb->u.ufs_sb.s_ucg[i]); kfree (sb->u.ufs_sb.s_ucg); for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) if (sb->u.ufs_sb.s_ucpi[i]) kfree (sb->u.ufs_sb.s_ucpi[i]); } UFSD(("EXIT (FAILED)\n")) return 0; } /* * Put on-disk structures associated with cylinder groups and * write them back to disk */ void ufs_put_cylinder_structures (struct super_block * sb) { struct ufs_sb_private_info * uspi; struct ufs_buffer_head * ubh; unsigned char * base, * space; unsigned blks, size, i; UFSD(("ENTER\n")) uspi = sb->u.ufs_sb.s_uspi; size = uspi->s_cssize; blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; base = space = (char*) sb->u.ufs_sb.s_csp[0]; for (i = 0; i < blks; i += uspi->s_fpb) { size = uspi->s_bsize; if (i + uspi->s_fpb > blks) size = (blks - i) * uspi->s_fsize; ubh = ubh_bread (sb->s_dev, uspi->s_csaddr + i, size); ubh_memcpyubh (ubh, space, size); space += size; ubh_mark_buffer_uptodate (ubh, 1); ubh_mark_buffer_dirty (ubh); ubh_brelse (ubh); } for (i = 0; i < sb->u.ufs_sb.s_cg_loaded; i++) { ufs_put_cylinder (sb, i); kfree (sb->u.ufs_sb.s_ucpi[i]); } for (; i < UFS_MAX_GROUP_LOADED; i++) kfree (sb->u.ufs_sb.s_ucpi[i]); for (i = 0; i < uspi->s_ncg; i++) brelse (sb->u.ufs_sb.s_ucg[i]); kfree (sb->u.ufs_sb.s_ucg); kfree (base); UFSD(("EXIT\n")) } struct super_block * ufs_read_super (struct super_block * sb, void * data, int silent) { struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_super_block_second * usb2; struct ufs_super_block_third * usb3; struct ufs_buffer_head * ubh; unsigned block_size, super_block_size; unsigned flags, swab; uspi = NULL; ubh = NULL; flags = 0; swab = 0; UFSD(("ENTER\n")) UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY))) #ifndef CONFIG_UFS_FS_WRITE if (!(sb->s_flags & MS_RDONLY)) { printk("ufs was compiled with read-only support, " "can't be mounted as read-write\n"); goto failed; } #endif /* * Set default mount options * Parse mount options */ sb->u.ufs_sb.s_mount_opt = 0; ufs_set_opt (sb->u.ufs_sb.s_mount_opt, ONERROR_LOCK); if (!ufs_parse_options ((char *) data, &sb->u.ufs_sb.s_mount_opt)) { printk("wrong mount options\n"); goto failed; } if (!(sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE)) { printk("You didn't specify the type of your ufs filesystem\n\n" "mount -t ufs -o ufstype=" "sun|sunx86|44bsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n" ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " "default is ufstype=old\n"); ufs_set_opt (sb->u.ufs_sb.s_mount_opt, UFSTYPE_OLD); } sb->u.ufs_sb.s_uspi = uspi = kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); if (!uspi) goto failed; /* Set a 2Gig file limit. Some UFS variants need to override this but as I don't know which I'll let those in the know loosen the rules */ sb->s_maxbytes = MAX_NON_LFS; switch (sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) { case UFS_MOUNT_UFSTYPE_44BSD: UFSD(("ufstype=44bsd\n")) uspi->s_fsize = block_size = 512; uspi->s_fmask = ~(512 - 1); uspi->s_fshift = 9; uspi->s_sbsize = super_block_size = 1536; uspi->s_sbbase = 0; flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; break; case UFS_MOUNT_UFSTYPE_SUN: UFSD(("ufstype=sun\n")) uspi->s_fsize = block_size = 1024; uspi->s_fmask = ~(1024 - 1); uspi->s_fshift = 10; uspi->s_sbsize = super_block_size = 2048; uspi->s_sbbase = 0; uspi->s_maxsymlinklen = 56; flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; break; case UFS_MOUNT_UFSTYPE_SUNx86: UFSD(("ufstype=sunx86\n")) uspi->s_fsize = block_size = 1024; uspi->s_fmask = ~(1024 - 1); uspi->s_fshift = 10; uspi->s_sbsize = super_block_size = 2048; uspi->s_sbbase = 0; uspi->s_maxsymlinklen = 56; flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN; break; case UFS_MOUNT_UFSTYPE_OLD: UFSD(("ufstype=old\n")) uspi->s_fsize = block_size = 1024; uspi->s_fmask = ~(1024 - 1); uspi->s_fshift = 10; uspi->s_sbsize = super_block_size = 2048; uspi->s_sbbase = 0; flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; if (!(sb->s_flags & MS_RDONLY)) { printk(KERN_INFO "ufstype=old is supported read-only\n"); sb->s_flags |= MS_RDONLY; } break; case UFS_MOUNT_UFSTYPE_NEXTSTEP: UFSD(("ufstype=nextstep\n")) uspi->s_fsize = block_size = 1024; uspi->s_fmask = ~(1024 - 1); uspi->s_fshift = 10; uspi->s_sbsize = super_block_size = 2048; uspi->s_sbbase = 0; flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; if (!(sb->s_flags & MS_RDONLY)) { printk(KERN_INFO "ufstype=nextstep is supported read-only\n"); sb->s_flags |= MS_RDONLY; } break; case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD: UFSD(("ufstype=nextstep-cd\n")) uspi->s_fsize = block_size = 2048; uspi->s_fmask = ~(2048 - 1); uspi->s_fshift = 11; uspi->s_sbsize = super_block_size = 2048; uspi->s_sbbase = 0; flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; if (!(sb->s_flags & MS_RDONLY)) { printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n"); sb->s_flags |= MS_RDONLY; } break; case UFS_MOUNT_UFSTYPE_OPENSTEP: UFSD(("ufstype=openstep\n")) uspi->s_fsize = block_size = 1024; uspi->s_fmask = ~(1024 - 1); uspi->s_fshift = 10; uspi->s_sbsize = super_block_size = 2048; uspi->s_sbbase = 0; flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; if (!(sb->s_flags & MS_RDONLY)) { printk(KERN_INFO "ufstype=openstep is supported read-only\n"); sb->s_flags |= MS_RDONLY; } break; case UFS_MOUNT_UFSTYPE_HP: UFSD(("ufstype=hp\n")) uspi->s_fsize = block_size = 1024; uspi->s_fmask = ~(1024 - 1); uspi->s_fshift = 10; uspi->s_sbsize = super_block_size = 2048; uspi->s_sbbase = 0; flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; if (!(sb->s_flags & MS_RDONLY)) { printk(KERN_INFO "ufstype=hp is supported read-only\n"); sb->s_flags |= MS_RDONLY; } break; default: printk("unknown ufstype\n"); goto failed; } again: set_blocksize (sb->s_dev, block_size); /* * read ufs super block from device */ ubh = ubh_bread_uspi (uspi, sb->s_dev, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size); if (!ubh) goto failed; usb1 = ubh_get_usb_first(USPI_UBH); usb2 = ubh_get_usb_second(USPI_UBH); usb3 = ubh_get_usb_third(USPI_UBH); /* * Check ufs magic number */ #if defined(__LITTLE_ENDIAN) || defined(__BIG_ENDIAN) /* sane bytesex */ switch (usb3->fs_magic) { case UFS_MAGIC: case UFS_MAGIC_LFN: case UFS_MAGIC_FEA: case UFS_MAGIC_4GB: swab = UFS_NATIVE_ENDIAN; goto magic_found; case UFS_CIGAM: case UFS_CIGAM_LFN: case UFS_CIGAM_FEA: case UFS_CIGAM_4GB: swab = UFS_SWABBED_ENDIAN; goto magic_found; } #else /* bytesex perversion */ switch (le32_to_cpup(&usb3->fs_magic)) { case UFS_MAGIC: case UFS_MAGIC_LFN: case UFS_MAGIC_FEA: case UFS_MAGIC_4GB: swab = UFS_LITTLE_ENDIAN; goto magic_found; case UFS_CIGAM: case UFS_CIGAM_LFN: case UFS_CIGAM_FEA: case UFS_CIGAM_4GB: swab = UFS_BIG_ENDIAN; goto magic_found; } #endif if ((((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) || ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) && uspi->s_sbbase < 256) { ubh_brelse_uspi(uspi); ubh = NULL; uspi->s_sbbase += 8; goto again; } printk("ufs_read_super: bad magic number\n"); goto failed; magic_found: /* * Check block and fragment sizes */ uspi->s_bsize = SWAB32(usb1->fs_bsize); uspi->s_fsize = SWAB32(usb1->fs_fsize); uspi->s_sbsize = SWAB32(usb1->fs_sbsize); uspi->s_fmask = SWAB32(usb1->fs_fmask); uspi->s_fshift = SWAB32(usb1->fs_fshift); if (uspi->s_bsize != 4096 && uspi->s_bsize != 8192 && uspi->s_bsize != 32768) { printk("ufs_read_super: fs_bsize %u != {4096, 8192, 32768}\n", uspi->s_bsize); goto failed; } if (uspi->s_fsize != 512 && uspi->s_fsize != 1024 && uspi->s_fsize != 2048 && uspi->s_fsize != 4096) { printk("ufs_read_super: fs_fsize %u != {512, 1024, 2048. 4096}\n", uspi->s_fsize); goto failed; } if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) { ubh_brelse_uspi(uspi); ubh = NULL; block_size = uspi->s_fsize; super_block_size = uspi->s_sbsize; UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size)) goto again; } #ifdef UFS_SUPER_DEBUG_MORE ufs_print_super_stuff (usb1, usb2, usb3, swab); #endif /* * Check, if file system was correctly unmounted. * If not, make it read only. */ if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) || ((flags & UFS_ST_MASK) == UFS_ST_OLD) || (((flags & UFS_ST_MASK) == UFS_ST_SUN || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && (ufs_get_fs_state(usb1, usb3) == (UFS_FSOK - SWAB32(usb1->fs_time))))) { switch(usb1->fs_clean) { case UFS_FSCLEAN: UFSD(("fs is clean\n")) break; case UFS_FSSTABLE: UFSD(("fs is stable\n")) break; case UFS_FSOSF1: UFSD(("fs is DEC OSF/1\n")) break; case UFS_FSACTIVE: printk("ufs_read_super: fs is active\n"); sb->s_flags |= MS_RDONLY; break; case UFS_FSBAD: printk("ufs_read_super: fs is bad\n"); sb->s_flags |= MS_RDONLY; break; default: printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean); sb->s_flags |= MS_RDONLY; break; } } else { printk("ufs_read_super: fs needs fsck\n"); sb->s_flags |= MS_RDONLY; } /* * Read ufs_super_block into internal data structures */ sb->s_blocksize = SWAB32(usb1->fs_fsize); sb->s_blocksize_bits = SWAB32(usb1->fs_fshift); sb->s_op = &ufs_super_ops; sb->dq_op = NULL; /***/ sb->s_magic = SWAB32(usb3->fs_magic); uspi->s_sblkno = SWAB32(usb1->fs_sblkno); uspi->s_cblkno = SWAB32(usb1->fs_cblkno); uspi->s_iblkno = SWAB32(usb1->fs_iblkno); uspi->s_dblkno = SWAB32(usb1->fs_dblkno); uspi->s_cgoffset = SWAB32(usb1->fs_cgoffset); uspi->s_cgmask = SWAB32(usb1->fs_cgmask); uspi->s_size = SWAB32(usb1->fs_size); uspi->s_dsize = SWAB32(usb1->fs_dsize); uspi->s_ncg = SWAB32(usb1->fs_ncg); /* s_bsize already set */ /* s_fsize already set */ uspi->s_fpb = SWAB32(usb1->fs_frag); uspi->s_minfree = SWAB32(usb1->fs_minfree); uspi->s_bmask = SWAB32(usb1->fs_bmask); uspi->s_fmask = SWAB32(usb1->fs_fmask); uspi->s_bshift = SWAB32(usb1->fs_bshift); uspi->s_fshift = SWAB32(usb1->fs_fshift); uspi->s_fpbshift = SWAB32(usb1->fs_fragshift); uspi->s_fsbtodb = SWAB32(usb1->fs_fsbtodb); /* s_sbsize already set */ uspi->s_csmask = SWAB32(usb1->fs_csmask); uspi->s_csshift = SWAB32(usb1->fs_csshift); uspi->s_nindir = SWAB32(usb1->fs_nindir); uspi->s_inopb = SWAB32(usb1->fs_inopb); uspi->s_nspf = SWAB32(usb1->fs_nspf); uspi->s_npsect = ufs_get_fs_npsect(usb1, usb3); uspi->s_interleave = SWAB32(usb1->fs_interleave); uspi->s_trackskew = SWAB32(usb1->fs_trackskew); uspi->s_csaddr = SWAB32(usb1->fs_csaddr); uspi->s_cssize = SWAB32(usb1->fs_cssize); uspi->s_cgsize = SWAB32(usb1->fs_cgsize); uspi->s_ntrak = SWAB32(usb1->fs_ntrak); uspi->s_nsect = SWAB32(usb1->fs_nsect); uspi->s_spc = SWAB32(usb1->fs_spc); uspi->s_ipg = SWAB32(usb1->fs_ipg); uspi->s_fpg = SWAB32(usb1->fs_fpg); uspi->s_cpc = SWAB32(usb2->fs_cpc); uspi->s_contigsumsize = SWAB32(usb3->fs_u2.fs_44.fs_contigsumsize); uspi->s_qbmask = ufs_get_fs_qbmask(usb3); uspi->s_qfmask = ufs_get_fs_qfmask(usb3); uspi->s_postblformat = SWAB32(usb3->fs_postblformat); uspi->s_nrpos = SWAB32(usb3->fs_nrpos); uspi->s_postbloff = SWAB32(usb3->fs_postbloff); uspi->s_rotbloff = SWAB32(usb3->fs_rotbloff); /* * Compute another frequently used values */ uspi->s_fpbmask = uspi->s_fpb - 1; uspi->s_apbshift = uspi->s_bshift - 2; uspi->s_2apbshift = uspi->s_apbshift * 2; uspi->s_3apbshift = uspi->s_apbshift * 3; uspi->s_apb = 1 << uspi->s_apbshift; uspi->s_2apb = 1 << uspi->s_2apbshift; uspi->s_3apb = 1 << uspi->s_3apbshift; uspi->s_apbmask = uspi->s_apb - 1; uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS; uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift; uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift; uspi->s_bpf = uspi->s_fsize << 3; uspi->s_bpfshift = uspi->s_fshift + 3; uspi->s_bpfmask = uspi->s_bpf - 1; if ((sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD) uspi->s_maxsymlinklen = SWAB32(usb3->fs_u2.fs_44.fs_maxsymlinklen); sb->u.ufs_sb.s_flags = flags; sb->u.ufs_sb.s_swab = swab; sb->s_root = d_alloc_root(iget(sb, UFS_ROOTINO)); /* * Read cylinder group structures */ if (!(sb->s_flags & MS_RDONLY)) if (!ufs_read_cylinder_structures(sb)) goto failed; UFSD(("EXIT\n")) return(sb); failed: if (ubh) ubh_brelse_uspi (uspi); if (uspi) kfree (uspi); UFSD(("EXIT (FAILED)\n")) return(NULL); } void ufs_write_super (struct super_block * sb) { struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_super_block_third * usb3; unsigned flags, swab; UFSD(("ENTER\n")) swab = sb->u.ufs_sb.s_swab; flags = sb->u.ufs_sb.s_flags; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first(USPI_UBH); usb3 = ubh_get_usb_third(USPI_UBH); if (!(sb->s_flags & MS_RDONLY)) { usb1->fs_time = SWAB32(CURRENT_TIME); if ((flags & UFS_ST_MASK) == UFS_ST_SUN || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) ufs_set_fs_state(usb1, usb3, UFS_FSOK - SWAB32(usb1->fs_time)); ubh_mark_buffer_dirty (USPI_UBH); } sb->s_dirt = 0; UFSD(("EXIT\n")) } void ufs_put_super (struct super_block * sb) { struct ufs_sb_private_info * uspi; unsigned swab; UFSD(("ENTER\n")) uspi = sb->u.ufs_sb.s_uspi; swab = sb->u.ufs_sb.s_swab; if (!(sb->s_flags & MS_RDONLY)) ufs_put_cylinder_structures (sb); ubh_brelse_uspi (uspi); kfree (sb->u.ufs_sb.s_uspi); return; } int ufs_remount (struct super_block * sb, int * mount_flags, char * data) { struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_super_block_third * usb3; unsigned new_mount_opt, ufstype; unsigned flags, swab; uspi = sb->u.ufs_sb.s_uspi; flags = sb->u.ufs_sb.s_flags; swab = sb->u.ufs_sb.s_swab; usb1 = ubh_get_usb_first(USPI_UBH); usb3 = ubh_get_usb_third(USPI_UBH); /* * Allow the "check" option to be passed as a remount option. * It is not possible to change ufstype option during remount */ ufstype = sb->u.ufs_sb.s_mount_opt & UFS_MOUNT_UFSTYPE; new_mount_opt = 0; ufs_set_opt (new_mount_opt, ONERROR_LOCK); if (!ufs_parse_options (data, &new_mount_opt)) return -EINVAL; if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { new_mount_opt |= ufstype; } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { printk("ufstype can't be changed during remount\n"); return -EINVAL; } if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { sb->u.ufs_sb.s_mount_opt = new_mount_opt; return 0; } /* * fs was mouted as rw, remounting ro */ if (*mount_flags & MS_RDONLY) { ufs_put_cylinder_structures(sb); usb1->fs_time = SWAB32(CURRENT_TIME); if ((flags & UFS_ST_MASK) == UFS_ST_SUN || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) ufs_set_fs_state(usb1, usb3, UFS_FSOK - SWAB32(usb1->fs_time)); ubh_mark_buffer_dirty (USPI_UBH); sb->s_dirt = 0; sb->s_flags |= MS_RDONLY; } /* * fs was mounted as ro, remounting rw */ else { #ifndef CONFIG_UFS_FS_WRITE printk("ufs was compiled with read-only support, " "can't be mounted as read-write\n"); return -EINVAL; #else if (ufstype != UFS_MOUNT_UFSTYPE_SUN && ufstype != UFS_MOUNT_UFSTYPE_44BSD && ufstype != UFS_MOUNT_UFSTYPE_SUNx86) { printk("this ufstype is read-only supported\n"); return -EINVAL; } if (!ufs_read_cylinder_structures (sb)) { printk("failed during remounting\n"); return -EPERM; } sb->s_flags &= ~MS_RDONLY; #endif } sb->u.ufs_sb.s_mount_opt = new_mount_opt; return 0; } int ufs_statfs (struct super_block * sb, struct statfs * buf) { struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; unsigned swab; swab = sb->u.ufs_sb.s_swab; uspi = sb->u.ufs_sb.s_uspi; usb1 = ubh_get_usb_first (USPI_UBH); buf->f_type = UFS_MAGIC; buf->f_bsize = sb->s_blocksize; buf->f_blocks = uspi->s_dsize; buf->f_bfree = ufs_blkstofrags(SWAB32(usb1->fs_cstotal.cs_nbfree)) + SWAB32(usb1->fs_cstotal.cs_nffree); buf->f_bavail = (buf->f_bfree > ((buf->f_blocks / 100) * uspi->s_minfree)) ? (buf->f_bfree - ((buf->f_blocks / 100) * uspi->s_minfree)) : 0; buf->f_files = uspi->s_ncg * uspi->s_ipg; buf->f_ffree = SWAB32(usb1->fs_cstotal.cs_nifree); buf->f_namelen = UFS_MAXNAMLEN; return 0; } static struct super_operations ufs_super_ops = { read_inode: ufs_read_inode, write_inode: ufs_write_inode, delete_inode: ufs_delete_inode, put_super: ufs_put_super, write_super: ufs_write_super, statfs: ufs_statfs, remount_fs: ufs_remount, }; static DECLARE_FSTYPE_DEV(ufs_fs_type, "ufs", ufs_read_super); static int __init init_ufs_fs(void) { return register_filesystem(&ufs_fs_type); } static void __exit exit_ufs_fs(void) { unregister_filesystem(&ufs_fs_type); } EXPORT_NO_SYMBOLS; module_init(init_ufs_fs) module_exit(exit_ufs_fs)