/* * 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 * * UFS2 (of FreeBSD 5.x) support added by * Niraj Kumar , Jan 2004 * */ #include #include #include #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 #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 super_block *sb, struct ufs_super_block_first * usb1, struct ufs_super_block_second * usb2, struct ufs_super_block_third * usb3) { printk("ufs_print_super_stuff\n"); printk("size of usb: %u\n", sizeof(struct ufs_super_block)); printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb3->fs_magic)); printk(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); printk(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); printk(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); printk(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); printk(" cgoffset: %u\n", fs32_to_cpu(sb, usb1->fs_cgoffset)); printk(" ~cgmask: 0x%x\n", ~fs32_to_cpu(sb, usb1->fs_cgmask)); printk(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); printk(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); printk(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); printk(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); printk(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); printk(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); printk(" fragshift: %u\n", fs32_to_cpu(sb, usb1->fs_fragshift)); printk(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); printk(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); printk(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); printk(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); printk(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); printk(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); printk(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); printk(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); printk(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); printk(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); printk(" fstodb: %u\n", fs32_to_cpu(sb, usb1->fs_fsbtodb)); printk(" contigsumsize: %d\n", fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize)); printk(" postblformat: %u\n", fs32_to_cpu(sb, usb3->fs_postblformat)); printk(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); printk(" ndir %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); printk(" nifree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); printk(" nbfree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); printk(" nffree %u\n", fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); printk("\n"); } /* * Print contents of ufs2 ufs_super_block, useful for debugging */ void ufs2_print_super_stuff( struct super_block *sb, struct ufs_super_block *usb) { printk("ufs_print_super_stuff\n"); printk("size of usb: %u\n", sizeof(struct ufs_super_block)); printk(" magic: 0x%x\n", fs32_to_cpu(sb, usb->fs_magic)); printk(" fs_size: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size)); printk(" fs_dsize: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize)); printk(" bsize: %u\n", fs32_to_cpu(usb, usb->fs_bsize)); printk(" fsize: %u\n", fs32_to_cpu(usb, usb->fs_fsize)); printk(" fs_volname: %s\n", usb->fs_u11.fs_u2.fs_volname); printk(" fs_fsmnt: %s\n", usb->fs_u11.fs_u2.fs_fsmnt); printk(" fs_sblockloc: %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_sblockloc)); printk(" cs_ndir(No of dirs): %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_ndir)); printk(" cs_nbfree(No of free blocks): %u\n",fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)); printk("\n"); } /* * Print contents of ufs_cylinder_group, useful for debugging */ void ufs_print_cylinder_stuff(struct super_block *sb, struct ufs_cylinder_group *cg) { printk("\nufs_print_cylinder_stuff\n"); printk("size of ucg: %u\n", sizeof(struct ufs_cylinder_group)); printk(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); printk(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); printk(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); printk(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); printk(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); printk(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); printk(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); printk(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); printk(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); printk(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); printk(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); printk(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); printk(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); printk(" frsum: %u, %u, %u, %u, %u, %u, %u, %u\n", fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]), fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]), fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]), fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7])); printk(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); printk(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); printk(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); printk(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); printk(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); printk(" clustersumoff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); printk(" clusteroff %u\n", fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); printk(" nclusterblks %u\n", fs32_to_cpu(sb, 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 = UFS_SB(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 (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { case UFS_MOUNT_ONERROR_PANIC: panic ("UFS-fs panic (device %s): %s: %s\n", sb->s_id, 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", sb->s_id, 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 = UFS_SB(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); sb->s_flags |= MS_RDONLY; printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n", sb->s_id, 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", sb->s_id, function, error_buf); } enum { Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd, Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep, Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock, Opt_onerror_umount, Opt_onerror_repair, Opt_err }; static match_table_t tokens = { {Opt_type_old, "ufstype=old"}, {Opt_type_sunx86, "ufstype=sunx86"}, {Opt_type_sun, "ufstype=sun"}, {Opt_type_44bsd, "ufstype=44bsd"}, {Opt_type_ufs2, "ufstype=ufs2"}, {Opt_type_ufs2, "ufstype=5xbsd"}, {Opt_type_hp, "ufstype=hp"}, {Opt_type_nextstepcd, "ufstype=nextstep-cd"}, {Opt_type_nextstep, "ufstype=nextstep"}, {Opt_type_openstep, "ufstype=openstep"}, {Opt_onerror_panic, "onerror=panic"}, {Opt_onerror_lock, "onerror=lock"}, {Opt_onerror_umount, "onerror=umount"}, {Opt_onerror_repair, "onerror=repair"}, {Opt_err, NULL} }; static int ufs_parse_options (char * options, unsigned * mount_options) { char * p; UFSD(("ENTER\n")) if (!options) return 1; while ((p = strsep(&options, ",")) != NULL) { substring_t args[MAX_OPT_ARGS]; int token; if (!*p) continue; token = match_token(p, tokens, args); switch (token) { case Opt_type_old: ufs_clear_opt (*mount_options, UFSTYPE); ufs_set_opt (*mount_options, UFSTYPE_OLD); break; case Opt_type_sunx86: ufs_clear_opt (*mount_options, UFSTYPE); ufs_set_opt (*mount_options, UFSTYPE_SUNx86); break; case Opt_type_sun: ufs_clear_opt (*mount_options, UFSTYPE); ufs_set_opt (*mount_options, UFSTYPE_SUN); break; case Opt_type_44bsd: ufs_clear_opt (*mount_options, UFSTYPE); ufs_set_opt (*mount_options, UFSTYPE_44BSD); break; case Opt_type_ufs2: ufs_clear_opt(*mount_options, UFSTYPE); ufs_set_opt(*mount_options, UFSTYPE_UFS2); break; case Opt_type_hp: ufs_clear_opt (*mount_options, UFSTYPE); ufs_set_opt (*mount_options, UFSTYPE_HP); break; case Opt_type_nextstepcd: ufs_clear_opt (*mount_options, UFSTYPE); ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD); break; case Opt_type_nextstep: ufs_clear_opt (*mount_options, UFSTYPE); ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP); break; case Opt_type_openstep: ufs_clear_opt (*mount_options, UFSTYPE); ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP); break; case Opt_onerror_panic: ufs_clear_opt (*mount_options, ONERROR); ufs_set_opt (*mount_options, ONERROR_PANIC); break; case Opt_onerror_lock: ufs_clear_opt (*mount_options, ONERROR); ufs_set_opt (*mount_options, ONERROR_LOCK); break; case Opt_onerror_umount: ufs_clear_opt (*mount_options, ONERROR); ufs_set_opt (*mount_options, ONERROR_UMOUNT); break; case Opt_onerror_repair: printk("UFS-fs: Unable to do repair on error, " "will lock lock instead\n"); ufs_clear_opt (*mount_options, ONERROR); ufs_set_opt (*mount_options, ONERROR_REPAIR); break; default: printk("UFS-fs: Invalid option: \"%s\" " "or missing value\n", p); return 0; } } return 1; } /* * Read on-disk structures associated with cylinder groups */ static int ufs_read_cylinder_structures (struct super_block *sb) { struct ufs_sb_info * sbi = UFS_SB(sb); struct ufs_sb_private_info * uspi; struct ufs_super_block *usb; struct ufs_buffer_head * ubh; unsigned char * base, * space; unsigned size, blks, i; unsigned flags = 0; UFSD(("ENTER\n")) uspi = sbi->s_uspi; usb = (struct ufs_super_block *) ((struct ufs_buffer_head *)uspi)->bh[0]->b_data; flags = UFS_SB(sb)->s_flags; /* * 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; if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { ubh = ubh_bread(sb, fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_csaddr) + i, size); if (!ubh) goto failed; ubh_ubhcpymem (space, ubh, size); sbi->s_csp[ufs_fragstoblks(i)]=(struct ufs_csum *)space; } else { ubh = ubh_bread(sb, uspi->s_csaddr + i, size); if (!ubh) goto failed; ubh_ubhcpymem(space, ubh, size); sbi->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 (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL))) goto failed; for (i = 0; i < uspi->s_ncg; i++) sbi->s_ucg[i] = NULL; for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { sbi->s_ucpi[i] = NULL; sbi->s_cgno[i] = UFS_CGNO_EMPTY; } for (i = 0; i < uspi->s_ncg; i++) { UFSD(("read cg %u\n", i)) if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i)))) goto failed; if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data)) goto failed; #ifdef UFS_SUPER_DEBUG_MORE ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); #endif } for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL))) goto failed; sbi->s_cgno[i] = UFS_CGNO_EMPTY; } sbi->s_cg_loaded = 0; UFSD(("EXIT\n")) return 1; failed: if (base) kfree (base); if (sbi->s_ucg) { for (i = 0; i < uspi->s_ncg; i++) if (sbi->s_ucg[i]) brelse (sbi->s_ucg[i]); kfree (sbi->s_ucg); for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) if (sbi->s_ucpi[i]) kfree (sbi->s_ucpi[i]); } UFSD(("EXIT (FAILED)\n")) return 0; } /* * Put on-disk structures associated with cylinder groups and * write them back to disk */ static void ufs_put_cylinder_structures (struct super_block *sb) { struct ufs_sb_info * sbi = UFS_SB(sb); struct ufs_sb_private_info * uspi; struct ufs_buffer_head * ubh; unsigned char * base, * space; unsigned blks, size, i; UFSD(("ENTER\n")) uspi = sbi->s_uspi; size = uspi->s_cssize; blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; base = space = (char*) sbi->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, 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 < sbi->s_cg_loaded; i++) { ufs_put_cylinder (sb, i); kfree (sbi->s_ucpi[i]); } for (; i < UFS_MAX_GROUP_LOADED; i++) kfree (sbi->s_ucpi[i]); for (i = 0; i < uspi->s_ncg; i++) brelse (sbi->s_ucg[i]); kfree (sbi->s_ucg); kfree (base); UFSD(("EXIT\n")) } static int ufs_fill_super(struct super_block *sb, void *data, int silent) { struct ufs_sb_info * sbi; 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_super_block *usb; struct ufs_buffer_head * ubh; struct inode *inode; unsigned block_size, super_block_size; unsigned flags; uspi = NULL; ubh = NULL; flags = 0; UFSD(("ENTER\n")) sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); if (!sbi) goto failed_nomem; sb->s_fs_info = sbi; memset(sbi, 0, sizeof(struct ufs_sb_info)); 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 */ sbi->s_mount_opt = 0; ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK); if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) { printk("wrong mount options\n"); goto failed; } if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { if (!silent) printk("You didn't specify the type of your ufs filesystem\n\n" "mount -t ufs -o ufstype=" "sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n" ">>>WARNING<<< Wrong ufstype may corrupt your filesystem, " "default is ufstype=old\n"); ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD); } sbi->s_uspi = uspi = kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL); if (!uspi) goto failed; /* Keep 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 */ switch (sbi->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_UFS2: UFSD(("ufstype=ufs2\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_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; if (!(sb->s_flags & MS_RDONLY)) { printk(KERN_INFO "ufstype=ufs2 is supported read-only\n"); sb->s_flags |= MS_RDONLY; } 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)) { if (!silent) 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)) { if (!silent) 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)) { if (!silent) 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)) { if (!silent) 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)) { if (!silent) printk(KERN_INFO "ufstype=hp is supported read-only\n"); sb->s_flags |= MS_RDONLY; } break; default: if (!silent) printk("unknown ufstype\n"); goto failed; } again: if (!sb_set_blocksize(sb, block_size)) { printk(KERN_ERR "UFS: failed to set blocksize\n"); goto failed; } /* * read ufs super block from device */ if ( (flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + SBLOCK_UFS2/block_size, super_block_size); } else { ubh = ubh_bread_uspi(uspi, sb, 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); usb = (struct ufs_super_block *) ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; /* * Check ufs magic number */ sbi->s_bytesex = BYTESEX_LE; switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { case UFS_MAGIC: case UFS2_MAGIC: case UFS_MAGIC_LFN: case UFS_MAGIC_FEA: case UFS_MAGIC_4GB: goto magic_found; } sbi->s_bytesex = BYTESEX_BE; switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { case UFS_MAGIC: case UFS2_MAGIC: case UFS_MAGIC_LFN: case UFS_MAGIC_FEA: case UFS_MAGIC_4GB: goto magic_found; } if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) || ((sbi->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; } if (!silent) printk("ufs_read_super: bad magic number\n"); goto failed; magic_found: /* * Check block and fragment sizes */ uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize); uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize); uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize); uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); if (uspi->s_fsize & (uspi->s_fsize - 1)) { printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n", uspi->s_fsize); goto failed; } if (uspi->s_fsize < 512) { printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n", uspi->s_fsize); goto failed; } if (uspi->s_fsize > 4096) { printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n", uspi->s_fsize); goto failed; } if (uspi->s_bsize & (uspi->s_bsize - 1)) { printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n", uspi->s_bsize); goto failed; } if (uspi->s_bsize < 4096) { printk(KERN_ERR "ufs_read_super: block size %u is too small\n", uspi->s_bsize); goto failed; } if (uspi->s_bsize / uspi->s_fsize > 8) { printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n", uspi->s_bsize / 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 if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) ufs2_print_super_stuff(sb,usb); else ufs_print_super_stuff(sb, usb1, usb2, usb3); #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(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, 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_op = &ufs_super_ops; sb->dq_op = NULL; /***/ sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic); uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno); uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno); uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno); uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno); uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset); uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask); if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { uspi->s_u2_size = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_size); uspi->s_u2_dsize = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); } else { uspi->s_size = fs32_to_cpu(sb, usb1->fs_size); uspi->s_dsize = fs32_to_cpu(sb, usb1->fs_dsize); } uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg); /* s_bsize already set */ /* s_fsize already set */ uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag); uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree); uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask); uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask); uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift); uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift); UFSD(("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift, uspi->s_fshift)); uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift); uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb); /* s_sbsize already set */ uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask); uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift); uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir); uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb); uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf); uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3); uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave); uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew); uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr); uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize); uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize); uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak); uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect); uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc); uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg); uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg); uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_cpc); uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_contigsumsize); uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos); uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff); uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff); /* * Compute another frequently used values */ uspi->s_fpbmask = uspi->s_fpb - 1; if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { uspi->s_apbshift = uspi->s_bshift - 3; } else { 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 ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_44BSD) uspi->s_maxsymlinklen = fs32_to_cpu(sb, usb3->fs_u2.fs_44.fs_maxsymlinklen); sbi->s_flags = flags; inode = iget(sb, UFS_ROOTINO); if (!inode || is_bad_inode(inode)) goto failed; sb->s_root = d_alloc_root(inode); if (!sb->s_root) goto dalloc_failed; /* * Read cylinder group structures */ if (!(sb->s_flags & MS_RDONLY)) if (!ufs_read_cylinder_structures(sb)) goto failed; UFSD(("EXIT\n")) return 0; dalloc_failed: iput(inode); failed: if (ubh) ubh_brelse_uspi (uspi); if (uspi) kfree (uspi); if (sbi) kfree(sbi); sb->s_fs_info = NULL; UFSD(("EXIT (FAILED)\n")) return -EINVAL; failed_nomem: UFSD(("EXIT (NOMEM)\n")) return -ENOMEM; } static 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; lock_kernel(); UFSD(("ENTER\n")) flags = UFS_SB(sb)->s_flags; uspi = UFS_SB(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 = cpu_to_fs32(sb, get_seconds()); if ((flags & UFS_ST_MASK) == UFS_ST_SUN || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) ufs_set_fs_state(sb, usb1, usb3, UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); ubh_mark_buffer_dirty (USPI_UBH); } sb->s_dirt = 0; UFSD(("EXIT\n")) unlock_kernel(); } static void ufs_put_super (struct super_block *sb) { struct ufs_sb_info * sbi = UFS_SB(sb); UFSD(("ENTER\n")) if (!(sb->s_flags & MS_RDONLY)) ufs_put_cylinder_structures (sb); ubh_brelse_uspi (sbi->s_uspi); kfree (sbi->s_uspi); kfree (sbi); sb->s_fs_info = NULL; return; } static 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; uspi = UFS_SB(sb)->s_uspi; flags = UFS_SB(sb)->s_flags; 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 = UFS_SB(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)) { UFS_SB(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 = cpu_to_fs32(sb, get_seconds()); if ((flags & UFS_ST_MASK) == UFS_ST_SUN || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) ufs_set_fs_state(sb, usb1, usb3, UFS_FSOK - fs32_to_cpu(sb, 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 } UFS_SB(sb)->s_mount_opt = new_mount_opt; return 0; } static int ufs_statfs (struct super_block *sb, struct kstatfs *buf) { struct ufs_sb_private_info * uspi; struct ufs_super_block_first * usb1; struct ufs_super_block * usb; unsigned flags = 0; lock_kernel(); uspi = UFS_SB(sb)->s_uspi; usb1 = ubh_get_usb_first (USPI_UBH); usb = (struct ufs_super_block *) ((struct ufs_buffer_head *)uspi)->bh[0]->b_data ; flags = UFS_SB(sb)->s_flags; if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) { buf->f_type = UFS2_MAGIC; buf->f_blocks = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_dsize); buf->f_bfree = ufs_blkstofrags(fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nbfree)) + fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nffree); buf->f_ffree = fs64_to_cpu(sb, usb->fs_u11.fs_u2.fs_cstotal.cs_nifree); } else { buf->f_type = UFS_MAGIC; buf->f_blocks = uspi->s_dsize; buf->f_bfree = ufs_blkstofrags(fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)) + fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); buf->f_ffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); } buf->f_bsize = sb->s_blocksize; buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree)) ? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0; buf->f_files = uspi->s_ncg * uspi->s_ipg; buf->f_namelen = UFS_MAXNAMLEN; unlock_kernel(); return 0; } static kmem_cache_t * ufs_inode_cachep; static struct inode *ufs_alloc_inode(struct super_block *sb) { struct ufs_inode_info *ei; ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, SLAB_KERNEL); if (!ei) return NULL; ei->vfs_inode.i_version = 1; return &ei->vfs_inode; } static void ufs_destroy_inode(struct inode *inode) { kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); } static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) { struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == SLAB_CTOR_CONSTRUCTOR) inode_init_once(&ei->vfs_inode); } static int init_inodecache(void) { ufs_inode_cachep = kmem_cache_create("ufs_inode_cache", sizeof(struct ufs_inode_info), 0, SLAB_RECLAIM_ACCOUNT, init_once, NULL); if (ufs_inode_cachep == NULL) return -ENOMEM; return 0; } static void destroy_inodecache(void) { if (kmem_cache_destroy(ufs_inode_cachep)) printk(KERN_INFO "ufs_inode_cache: not all structures were freed\n"); } #ifdef CONFIG_QUOTA static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t); static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t); #endif static struct super_operations ufs_super_ops = { .alloc_inode = ufs_alloc_inode, .destroy_inode = ufs_destroy_inode, .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, #ifdef CONFIG_QUOTA .quota_read = ufs_quota_read, .quota_write = ufs_quota_write, #endif }; #ifdef CONFIG_QUOTA /* Read data from quotafile - avoid pagecache and such because we cannot afford * acquiring the locks... As quota files are never truncated and quota code * itself serializes the operations (and noone else should touch the files) * we don't have to be afraid of races */ static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off) { struct inode *inode = sb_dqopt(sb)->files[type]; sector_t blk = off >> sb->s_blocksize_bits; int err = 0; int offset = off & (sb->s_blocksize - 1); int tocopy; size_t toread; struct buffer_head *bh; loff_t i_size = i_size_read(inode); if (off > i_size) return 0; if (off+len > i_size) len = i_size-off; toread = len; while (toread > 0) { tocopy = sb->s_blocksize - offset < toread ? sb->s_blocksize - offset : toread; bh = ufs_bread(inode, blk, 0, &err); if (err) return err; if (!bh) /* A hole? */ memset(data, 0, tocopy); else { memcpy(data, bh->b_data+offset, tocopy); brelse(bh); } offset = 0; toread -= tocopy; data += tocopy; blk++; } return len; } /* Write to quotafile */ static ssize_t ufs_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off) { struct inode *inode = sb_dqopt(sb)->files[type]; sector_t blk = off >> sb->s_blocksize_bits; int err = 0; int offset = off & (sb->s_blocksize - 1); int tocopy; size_t towrite = len; struct buffer_head *bh; down(&inode->i_sem); while (towrite > 0) { tocopy = sb->s_blocksize - offset < towrite ? sb->s_blocksize - offset : towrite; bh = ufs_bread(inode, blk, 1, &err); if (!bh) goto out; lock_buffer(bh); memcpy(bh->b_data+offset, data, tocopy); flush_dcache_page(bh->b_page); set_buffer_uptodate(bh); mark_buffer_dirty(bh); unlock_buffer(bh); brelse(bh); offset = 0; towrite -= tocopy; data += tocopy; blk++; } out: if (len == towrite) return err; if (inode->i_size < off+len-towrite) i_size_write(inode, off+len-towrite); inode->i_version++; inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; mark_inode_dirty(inode); up(&inode->i_sem); return len - towrite; } #endif static struct super_block *ufs_get_sb(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super); } static struct file_system_type ufs_fs_type = { .owner = THIS_MODULE, .name = "ufs", .get_sb = ufs_get_sb, .kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; static int __init init_ufs_fs(void) { int err = init_inodecache(); if (err) goto out1; err = register_filesystem(&ufs_fs_type); if (err) goto out; return 0; out: destroy_inodecache(); out1: return err; } static void __exit exit_ufs_fs(void) { unregister_filesystem(&ufs_fs_type); destroy_inodecache(); } module_init(init_ufs_fs) module_exit(exit_ufs_fs) MODULE_LICENSE("GPL");