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Diffstat (limited to 'fs/ufs/super.c')
| -rw-r--r-- | fs/ufs/super.c | 1545 |
1 files changed, 1545 insertions, 0 deletions
diff --git a/fs/ufs/super.c b/fs/ufs/super.c new file mode 100644 index 000000000..6e59e45d7 --- /dev/null +++ b/fs/ufs/super.c @@ -0,0 +1,1545 @@ +/* + * linux/fs/ufs/super.c + * + * Copyright (C) 1998 + * Daniel Pirkl <daniel.pirkl@email.cz> + * 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 <stepan@home.culture.mipt.ru> + * + * Module usage counts added on 96/04/29 by + * Gertjan van Wingerde <gwingerde@gmail.com> + * + * Clean swab support on 19970406 by + * Francois-Rene Rideau <fare@tunes.org> + * + * 4.4BSD (FreeBSD) support added on February 1st 1998 by + * Niels Kristian Bech Jensen <nkbj@image.dk> partially based + * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. + * + * NeXTstep support added on February 5th 1998 by + * Niels Kristian Bech Jensen <nkbj@image.dk>. + * + * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998 + * + * HP/UX hfs filesystem support added by + * Martin K. Petersen <mkp@mkp.net>, August 1999 + * + * UFS2 (of FreeBSD 5.x) support added by + * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004 + * + * UFS2 write support added by + * Evgeniy Dushistov <dushistov@mail.ru>, 2007 + */ + +#include <linux/exportfs.h> +#include <linux/module.h> +#include <linux/bitops.h> + +#include <stdarg.h> + +#include <linux/uaccess.h> + +#include <linux/errno.h> +#include <linux/fs.h> +#include <linux/slab.h> +#include <linux/time.h> +#include <linux/stat.h> +#include <linux/string.h> +#include <linux/blkdev.h> +#include <linux/backing-dev.h> +#include <linux/init.h> +#include <linux/parser.h> +#include <linux/buffer_head.h> +#include <linux/vfs.h> +#include <linux/log2.h> +#include <linux/mount.h> +#include <linux/seq_file.h> +#include <linux/iversion.h> + +#include "ufs_fs.h" +#include "ufs.h" +#include "swab.h" +#include "util.h" + +static struct inode *ufs_nfs_get_inode(struct super_block *sb, u64 ino, u32 generation) +{ + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct inode *inode; + + if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg) + return ERR_PTR(-ESTALE); + + inode = ufs_iget(sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); + if (generation && inode->i_generation != generation) { + iput(inode); + return ERR_PTR(-ESTALE); + } + return inode; +} + +static struct dentry *ufs_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_dentry(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); +} + +static struct dentry *ufs_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_parent(sb, fid, fh_len, fh_type, ufs_nfs_get_inode); +} + +static struct dentry *ufs_get_parent(struct dentry *child) +{ + struct qstr dot_dot = QSTR_INIT("..", 2); + ino_t ino; + + ino = ufs_inode_by_name(d_inode(child), &dot_dot); + if (!ino) + return ERR_PTR(-ENOENT); + return d_obtain_alias(ufs_iget(child->d_sb, ino)); +} + +static const struct export_operations ufs_export_ops = { + .fh_to_dentry = ufs_fh_to_dentry, + .fh_to_parent = ufs_fh_to_parent, + .get_parent = ufs_get_parent, +}; + +#ifdef CONFIG_UFS_DEBUG +/* + * Print contents of ufs_super_block, useful for debugging + */ +static 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) +{ + u32 magic = fs32_to_cpu(sb, usb3->fs_magic); + + pr_debug("ufs_print_super_stuff\n"); + pr_debug(" magic: 0x%x\n", magic); + if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) { + pr_debug(" fs_size: %llu\n", (unsigned long long) + fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size)); + pr_debug(" fs_dsize: %llu\n", (unsigned long long) + fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize)); + pr_debug(" bsize: %u\n", + fs32_to_cpu(sb, usb1->fs_bsize)); + pr_debug(" fsize: %u\n", + fs32_to_cpu(sb, usb1->fs_fsize)); + pr_debug(" fs_volname: %s\n", usb2->fs_un.fs_u2.fs_volname); + pr_debug(" fs_sblockloc: %llu\n", (unsigned long long) + fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc)); + pr_debug(" cs_ndir(No of dirs): %llu\n", (unsigned long long) + fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir)); + pr_debug(" cs_nbfree(No of free blocks): %llu\n", + (unsigned long long) + fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree)); + pr_info(" cs_nifree(Num of free inodes): %llu\n", + (unsigned long long) + fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree)); + pr_info(" cs_nffree(Num of free frags): %llu\n", + (unsigned long long) + fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree)); + pr_info(" fs_maxsymlinklen: %u\n", + fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen)); + } else { + pr_debug(" sblkno: %u\n", fs32_to_cpu(sb, usb1->fs_sblkno)); + pr_debug(" cblkno: %u\n", fs32_to_cpu(sb, usb1->fs_cblkno)); + pr_debug(" iblkno: %u\n", fs32_to_cpu(sb, usb1->fs_iblkno)); + pr_debug(" dblkno: %u\n", fs32_to_cpu(sb, usb1->fs_dblkno)); + pr_debug(" cgoffset: %u\n", + fs32_to_cpu(sb, usb1->fs_cgoffset)); + pr_debug(" ~cgmask: 0x%x\n", + ~fs32_to_cpu(sb, usb1->fs_cgmask)); + pr_debug(" size: %u\n", fs32_to_cpu(sb, usb1->fs_size)); + pr_debug(" dsize: %u\n", fs32_to_cpu(sb, usb1->fs_dsize)); + pr_debug(" ncg: %u\n", fs32_to_cpu(sb, usb1->fs_ncg)); + pr_debug(" bsize: %u\n", fs32_to_cpu(sb, usb1->fs_bsize)); + pr_debug(" fsize: %u\n", fs32_to_cpu(sb, usb1->fs_fsize)); + pr_debug(" frag: %u\n", fs32_to_cpu(sb, usb1->fs_frag)); + pr_debug(" fragshift: %u\n", + fs32_to_cpu(sb, usb1->fs_fragshift)); + pr_debug(" ~fmask: %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask)); + pr_debug(" fshift: %u\n", fs32_to_cpu(sb, usb1->fs_fshift)); + pr_debug(" sbsize: %u\n", fs32_to_cpu(sb, usb1->fs_sbsize)); + pr_debug(" spc: %u\n", fs32_to_cpu(sb, usb1->fs_spc)); + pr_debug(" cpg: %u\n", fs32_to_cpu(sb, usb1->fs_cpg)); + pr_debug(" ipg: %u\n", fs32_to_cpu(sb, usb1->fs_ipg)); + pr_debug(" fpg: %u\n", fs32_to_cpu(sb, usb1->fs_fpg)); + pr_debug(" csaddr: %u\n", fs32_to_cpu(sb, usb1->fs_csaddr)); + pr_debug(" cssize: %u\n", fs32_to_cpu(sb, usb1->fs_cssize)); + pr_debug(" cgsize: %u\n", fs32_to_cpu(sb, usb1->fs_cgsize)); + pr_debug(" fstodb: %u\n", + fs32_to_cpu(sb, usb1->fs_fsbtodb)); + pr_debug(" nrpos: %u\n", fs32_to_cpu(sb, usb3->fs_nrpos)); + pr_debug(" ndir %u\n", + fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir)); + pr_debug(" nifree %u\n", + fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree)); + pr_debug(" nbfree %u\n", + fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree)); + pr_debug(" nffree %u\n", + fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree)); + } + pr_debug("\n"); +} + +/* + * Print contents of ufs_cylinder_group, useful for debugging + */ +static void ufs_print_cylinder_stuff(struct super_block *sb, + struct ufs_cylinder_group *cg) +{ + pr_debug("\nufs_print_cylinder_stuff\n"); + pr_debug("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group)); + pr_debug(" magic: %x\n", fs32_to_cpu(sb, cg->cg_magic)); + pr_debug(" time: %u\n", fs32_to_cpu(sb, cg->cg_time)); + pr_debug(" cgx: %u\n", fs32_to_cpu(sb, cg->cg_cgx)); + pr_debug(" ncyl: %u\n", fs16_to_cpu(sb, cg->cg_ncyl)); + pr_debug(" niblk: %u\n", fs16_to_cpu(sb, cg->cg_niblk)); + pr_debug(" ndblk: %u\n", fs32_to_cpu(sb, cg->cg_ndblk)); + pr_debug(" cs_ndir: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir)); + pr_debug(" cs_nbfree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree)); + pr_debug(" cs_nifree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree)); + pr_debug(" cs_nffree: %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree)); + pr_debug(" rotor: %u\n", fs32_to_cpu(sb, cg->cg_rotor)); + pr_debug(" frotor: %u\n", fs32_to_cpu(sb, cg->cg_frotor)); + pr_debug(" irotor: %u\n", fs32_to_cpu(sb, cg->cg_irotor)); + pr_debug(" 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])); + pr_debug(" btotoff: %u\n", fs32_to_cpu(sb, cg->cg_btotoff)); + pr_debug(" boff: %u\n", fs32_to_cpu(sb, cg->cg_boff)); + pr_debug(" iuseoff: %u\n", fs32_to_cpu(sb, cg->cg_iusedoff)); + pr_debug(" freeoff: %u\n", fs32_to_cpu(sb, cg->cg_freeoff)); + pr_debug(" nextfreeoff: %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff)); + pr_debug(" clustersumoff %u\n", + fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff)); + pr_debug(" clusteroff %u\n", + fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff)); + pr_debug(" nclusterblks %u\n", + fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks)); + pr_debug("\n"); +} +#else +# define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/ +# define ufs_print_cylinder_stuff(sb, cg) /**/ +#endif /* CONFIG_UFS_DEBUG */ + +static const struct super_operations ufs_super_ops; + +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; + struct va_format vaf; + va_list args; + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(uspi); + + if (!sb_rdonly(sb)) { + usb1->fs_clean = UFS_FSBAD; + ubh_mark_buffer_dirty(USPI_UBH(uspi)); + ufs_mark_sb_dirty(sb); + sb->s_flags |= SB_RDONLY; + } + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) { + case UFS_MOUNT_ONERROR_PANIC: + panic("panic (device %s): %s: %pV\n", + sb->s_id, function, &vaf); + + case UFS_MOUNT_ONERROR_LOCK: + case UFS_MOUNT_ONERROR_UMOUNT: + case UFS_MOUNT_ONERROR_REPAIR: + pr_crit("error (device %s): %s: %pV\n", + sb->s_id, function, &vaf); + } + va_end(args); +} + +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; + struct va_format vaf; + va_list args; + + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(uspi); + + if (!sb_rdonly(sb)) { + usb1->fs_clean = UFS_FSBAD; + ubh_mark_buffer_dirty(USPI_UBH(uspi)); + ufs_mark_sb_dirty(sb); + } + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + sb->s_flags |= SB_RDONLY; + pr_crit("panic (device %s): %s: %pV\n", + sb->s_id, function, &vaf); + va_end(args); +} + +void ufs_warning (struct super_block * sb, const char * function, + const char * fmt, ...) +{ + struct va_format vaf; + va_list args; + + va_start(args, fmt); + vaf.fmt = fmt; + vaf.va = &args; + pr_warn("(device %s): %s: %pV\n", + sb->s_id, function, &vaf); + va_end(args); +} + +enum { + Opt_type_old = UFS_MOUNT_UFSTYPE_OLD, + Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86, + Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN, + Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS, + Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD, + Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2, + Opt_type_hp = UFS_MOUNT_UFSTYPE_HP, + Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD, + Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP, + Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP, + Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC, + Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK, + Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT, + Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR, + Opt_err +}; + +static const match_table_t tokens = { + {Opt_type_old, "ufstype=old"}, + {Opt_type_sunx86, "ufstype=sunx86"}, + {Opt_type_sun, "ufstype=sun"}, + {Opt_type_sunos, "ufstype=sunos"}, + {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"}, +/*end of possible ufs types */ + {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_sunos: + ufs_clear_opt(*mount_options, UFSTYPE); + ufs_set_opt(*mount_options, UFSTYPE_SUNOS); + 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: + pr_err("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: + pr_err("Invalid option: \"%s\" or missing value\n", p); + return 0; + } + } + return 1; +} + +/* + * Different types of UFS hold fs_cstotal in different + * places, and use different data structure for it. + * To make things simpler we just copy fs_cstotal to ufs_sb_private_info + */ +static void ufs_setup_cstotal(struct super_block *sb) +{ + struct ufs_sb_info *sbi = UFS_SB(sb); + struct ufs_sb_private_info *uspi = sbi->s_uspi; + struct ufs_super_block_first *usb1; + struct ufs_super_block_second *usb2; + struct ufs_super_block_third *usb3; + unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; + + UFSD("ENTER, mtype=%u\n", mtype); + usb1 = ubh_get_usb_first(uspi); + usb2 = ubh_get_usb_second(uspi); + usb3 = ubh_get_usb_third(uspi); + + if ((mtype == UFS_MOUNT_UFSTYPE_44BSD && + (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) || + mtype == UFS_MOUNT_UFSTYPE_UFS2) { + /*we have statistic in different place, then usual*/ + uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir); + uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree); + uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree); + uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree); + } else { + uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir); + uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree); + uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree); + uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree); + } + UFSD("EXIT\n"); +} + +/* + * 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 = sbi->s_uspi; + struct ufs_buffer_head * ubh; + unsigned char * base, * space; + unsigned size, blks, i; + + UFSD("ENTER\n"); + + /* + * 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_NOFS); + if (!base) + goto failed; + sbi->s_csp = (struct ufs_csum *)space; + 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); + + if (!ubh) + goto failed; + + ubh_ubhcpymem (space, ubh, size); + + 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. + */ + sbi->s_ucg = kmalloc_array(uspi->s_ncg, sizeof(struct buffer_head *), + GFP_NOFS); + if (!sbi->s_ucg) + 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; + + ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data); + } + for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) { + if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_NOFS))) + goto failed; + sbi->s_cgno[i] = UFS_CGNO_EMPTY; + } + sbi->s_cg_loaded = 0; + UFSD("EXIT\n"); + return 1; + +failed: + 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++) + kfree (sbi->s_ucpi[i]); + } + UFSD("EXIT (FAILED)\n"); + return 0; +} + +/* + * Sync our internal copy of fs_cstotal with disk + */ +static void ufs_put_cstotal(struct super_block *sb) +{ + unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE; + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + struct ufs_super_block_first *usb1; + struct ufs_super_block_second *usb2; + struct ufs_super_block_third *usb3; + + UFSD("ENTER\n"); + usb1 = ubh_get_usb_first(uspi); + usb2 = ubh_get_usb_second(uspi); + usb3 = ubh_get_usb_third(uspi); + + if (mtype == UFS_MOUNT_UFSTYPE_UFS2) { + /*we have statistic in different place, then usual*/ + usb2->fs_un.fs_u2.cs_ndir = + cpu_to_fs64(sb, uspi->cs_total.cs_ndir); + usb2->fs_un.fs_u2.cs_nbfree = + cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); + usb3->fs_un1.fs_u2.cs_nifree = + cpu_to_fs64(sb, uspi->cs_total.cs_nifree); + usb3->fs_un1.fs_u2.cs_nffree = + cpu_to_fs64(sb, uspi->cs_total.cs_nffree); + goto out; + } + + if (mtype == UFS_MOUNT_UFSTYPE_44BSD && + (usb2->fs_un.fs_u2.fs_maxbsize == usb1->fs_bsize)) { + /* store stats in both old and new places */ + usb2->fs_un.fs_u2.cs_ndir = + cpu_to_fs64(sb, uspi->cs_total.cs_ndir); + usb2->fs_un.fs_u2.cs_nbfree = + cpu_to_fs64(sb, uspi->cs_total.cs_nbfree); + usb3->fs_un1.fs_u2.cs_nifree = + cpu_to_fs64(sb, uspi->cs_total.cs_nifree); + usb3->fs_un1.fs_u2.cs_nffree = + cpu_to_fs64(sb, uspi->cs_total.cs_nffree); + } + usb1->fs_cstotal.cs_ndir = cpu_to_fs32(sb, uspi->cs_total.cs_ndir); + usb1->fs_cstotal.cs_nbfree = cpu_to_fs32(sb, uspi->cs_total.cs_nbfree); + usb1->fs_cstotal.cs_nifree = cpu_to_fs32(sb, uspi->cs_total.cs_nifree); + usb1->fs_cstotal.cs_nffree = cpu_to_fs32(sb, uspi->cs_total.cs_nffree); +out: + ubh_mark_buffer_dirty(USPI_UBH(uspi)); + ufs_print_super_stuff(sb, usb1, usb2, usb3); + UFSD("EXIT\n"); +} + +/** + * ufs_put_super_internal() - put on-disk intrenal structures + * @sb: pointer to super_block structure + * Put on-disk structures associated with cylinder groups + * and write them back to disk, also update cs_total on disk + */ +static void ufs_put_super_internal(struct super_block *sb) +{ + struct ufs_sb_info *sbi = UFS_SB(sb); + struct ufs_sb_private_info *uspi = sbi->s_uspi; + struct ufs_buffer_head * ubh; + unsigned char * base, * space; + unsigned blks, size, i; + + + UFSD("ENTER\n"); + + ufs_put_cstotal(sb); + size = uspi->s_cssize; + blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift; + base = space = (char*) sbi->s_csp; + 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_sync_fs(struct super_block *sb, int wait) +{ + struct ufs_sb_private_info * uspi; + struct ufs_super_block_first * usb1; + struct ufs_super_block_third * usb3; + unsigned flags; + + mutex_lock(&UFS_SB(sb)->s_lock); + + UFSD("ENTER\n"); + + flags = UFS_SB(sb)->s_flags; + uspi = UFS_SB(sb)->s_uspi; + usb1 = ubh_get_usb_first(uspi); + usb3 = ubh_get_usb_third(uspi); + + usb1->fs_time = ufs_get_seconds(sb); + if ((flags & UFS_ST_MASK) == UFS_ST_SUN || + (flags & UFS_ST_MASK) == UFS_ST_SUNOS || + (flags & UFS_ST_MASK) == UFS_ST_SUNx86) + ufs_set_fs_state(sb, usb1, usb3, + UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)); + ufs_put_cstotal(sb); + + UFSD("EXIT\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); + + return 0; +} + +static void delayed_sync_fs(struct work_struct *work) +{ + struct ufs_sb_info *sbi; + + sbi = container_of(work, struct ufs_sb_info, sync_work.work); + + spin_lock(&sbi->work_lock); + sbi->work_queued = 0; + spin_unlock(&sbi->work_lock); + + ufs_sync_fs(sbi->sb, 1); +} + +void ufs_mark_sb_dirty(struct super_block *sb) +{ + struct ufs_sb_info *sbi = UFS_SB(sb); + unsigned long delay; + + spin_lock(&sbi->work_lock); + if (!sbi->work_queued) { + delay = msecs_to_jiffies(dirty_writeback_interval * 10); + queue_delayed_work(system_long_wq, &sbi->sync_work, delay); + sbi->work_queued = 1; + } + spin_unlock(&sbi->work_lock); +} + +static void ufs_put_super(struct super_block *sb) +{ + struct ufs_sb_info * sbi = UFS_SB(sb); + + UFSD("ENTER\n"); + + if (!sb_rdonly(sb)) + ufs_put_super_internal(sb); + cancel_delayed_work_sync(&sbi->sync_work); + + ubh_brelse_uspi (sbi->s_uspi); + kfree (sbi->s_uspi); + kfree (sbi); + sb->s_fs_info = NULL; + UFSD("EXIT\n"); + return; +} + +static u64 ufs_max_bytes(struct super_block *sb) +{ + struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi; + int bits = uspi->s_apbshift; + u64 res; + + if (bits > 21) + res = ~0ULL; + else + res = UFS_NDADDR + (1LL << bits) + (1LL << (2*bits)) + + (1LL << (3*bits)); + + if (res >= (MAX_LFS_FILESIZE >> uspi->s_bshift)) + return MAX_LFS_FILESIZE; + return res << uspi->s_bshift; +} + +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_buffer_head * ubh; + struct inode *inode; + unsigned block_size, super_block_size; + unsigned flags; + unsigned super_block_offset; + unsigned maxsymlen; + int ret = -EINVAL; + + uspi = NULL; + ubh = NULL; + flags = 0; + + UFSD("ENTER\n"); + +#ifndef CONFIG_UFS_FS_WRITE + if (!sb_rdonly(sb)) { + pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); + return -EROFS; + } +#endif + + sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL); + if (!sbi) + goto failed_nomem; + sb->s_fs_info = sbi; + sbi->sb = sb; + + UFSD("flag %u\n", (int)(sb_rdonly(sb))); + + mutex_init(&sbi->s_lock); + spin_lock_init(&sbi->work_lock); + INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs); + /* + * 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)) { + pr_err("wrong mount options\n"); + goto failed; + } + if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) { + if (!silent) + pr_err("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|nextstep-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); + } + + uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL); + sbi->s_uspi = uspi; + if (!uspi) + goto failed; + uspi->s_dirblksize = UFS_SECTOR_SIZE; + super_block_offset=UFS_SBLOCK; + + sb->s_maxbytes = MAX_LFS_FILESIZE; + + 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"); + super_block_offset=SBLOCK_UFS2; + 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; + 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 = 0; /* Not supported on disk */ + flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN; + break; + + case UFS_MOUNT_UFSTYPE_SUNOS: + UFSD("ufstype=sunos\n"); + uspi->s_fsize = block_size = 1024; + uspi->s_fmask = ~(1024 - 1); + uspi->s_fshift = 10; + uspi->s_sbsize = 2048; + super_block_size = 2048; + uspi->s_sbbase = 0; + uspi->s_maxsymlinklen = 0; /* Not supported on disk */ + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | 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 = 0; /* Not supported on disk */ + 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_rdonly(sb)) { + if (!silent) + pr_info("ufstype=old is supported read-only\n"); + sb->s_flags |= SB_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; + uspi->s_dirblksize = 1024; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!sb_rdonly(sb)) { + if (!silent) + pr_info("ufstype=nextstep is supported read-only\n"); + sb->s_flags |= SB_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; + uspi->s_dirblksize = 1024; + flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD; + if (!sb_rdonly(sb)) { + if (!silent) + pr_info("ufstype=nextstep-cd is supported read-only\n"); + sb->s_flags |= SB_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; + uspi->s_dirblksize = 1024; + flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD; + if (!sb_rdonly(sb)) { + if (!silent) + pr_info("ufstype=openstep is supported read-only\n"); + sb->s_flags |= SB_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_rdonly(sb)) { + if (!silent) + pr_info("ufstype=hp is supported read-only\n"); + sb->s_flags |= SB_RDONLY; + } + break; + default: + if (!silent) + pr_err("unknown ufstype\n"); + goto failed; + } + +again: + if (!sb_set_blocksize(sb, block_size)) { + pr_err("failed to set blocksize\n"); + goto failed; + } + + /* + * read ufs super block from device + */ + + ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size); + + if (!ubh) + goto failed; + + usb1 = ubh_get_usb_first(uspi); + usb2 = ubh_get_usb_second(uspi); + usb3 = ubh_get_usb_third(uspi); + + /* Sort out mod used on SunOS 4.1.3 for fs_state */ + uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat); + if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) && + (uspi->s_postblformat != UFS_42POSTBLFMT)) { + flags &= ~UFS_ST_MASK; + flags |= UFS_ST_SUN; + } + + if ((flags & UFS_ST_MASK) == UFS_ST_44BSD && + uspi->s_postblformat == UFS_42POSTBLFMT) { + if (!silent) + pr_err("this is not a 44bsd filesystem"); + goto failed; + } + + /* + * Check ufs magic number + */ + sbi->s_bytesex = BYTESEX_LE; + switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) { + case UFS_MAGIC: + case UFS_MAGIC_BW: + 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 UFS_MAGIC_BW: + 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) + pr_err("%s(): bad magic number\n", __func__); + 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 (!is_power_of_2(uspi->s_fsize)) { + pr_err("%s(): fragment size %u is not a power of 2\n", + __func__, uspi->s_fsize); + goto failed; + } + if (uspi->s_fsize < 512) { + pr_err("%s(): fragment size %u is too small\n", + __func__, uspi->s_fsize); + goto failed; + } + if (uspi->s_fsize > 4096) { + pr_err("%s(): fragment size %u is too large\n", + __func__, uspi->s_fsize); + goto failed; + } + if (!is_power_of_2(uspi->s_bsize)) { + pr_err("%s(): block size %u is not a power of 2\n", + __func__, uspi->s_bsize); + goto failed; + } + if (uspi->s_bsize < 4096) { + pr_err("%s(): block size %u is too small\n", + __func__, uspi->s_bsize); + goto failed; + } + if (uspi->s_bsize / uspi->s_fsize > 8) { + pr_err("%s(): too many fragments per block (%u)\n", + __func__, 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; + } + + sbi->s_flags = flags;/*after that line some functions use s_flags*/ + ufs_print_super_stuff(sb, usb1, usb2, usb3); + + /* + * 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_SUNOS || + (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_FSLOG: + UFSD("fs is logging fs\n"); + break; + case UFS_FSOSF1: + UFSD("fs is DEC OSF/1\n"); + break; + case UFS_FSACTIVE: + pr_err("%s(): fs is active\n", __func__); + sb->s_flags |= SB_RDONLY; + break; + case UFS_FSBAD: + pr_err("%s(): fs is bad\n", __func__); + sb->s_flags |= SB_RDONLY; + break; + default: + pr_err("%s(): can't grok fs_clean 0x%x\n", + __func__, usb1->fs_clean); + sb->s_flags |= SB_RDONLY; + break; + } + } else { + pr_err("%s(): fs needs fsck\n", __func__); + sb->s_flags |= SB_RDONLY; + } + + /* + * Read ufs_super_block into internal data structures + */ + sb->s_op = &ufs_super_ops; + sb->s_export_op = &ufs_export_ops; + + 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_size = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size); + uspi->s_dsize = fs64_to_cpu(sb, usb3->fs_un1.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); + + if (uspi->fs_magic == UFS2_MAGIC) + uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr); + else + 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_un.fs_u1.fs_cpc); + uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize); + uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3); + uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3); + 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); + + uspi->s_root_blocks = mul_u64_u32_div(uspi->s_dsize, + uspi->s_minfree, 100); + if (uspi->s_minfree <= 5) { + uspi->s_time_to_space = ~0ULL; + uspi->s_space_to_time = 0; + usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE); + } else { + uspi->s_time_to_space = (uspi->s_root_blocks / 2) + 1; + uspi->s_space_to_time = mul_u64_u32_div(uspi->s_dsize, + uspi->s_minfree - 2, 100) - 1; + } + + /* + * 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 || + (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2) + uspi->s_maxsymlinklen = + fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen); + + if (uspi->fs_magic == UFS2_MAGIC) + maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR); + else + maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR); + if (uspi->s_maxsymlinklen > maxsymlen) { + ufs_warning(sb, __func__, "ufs_read_super: excessive maximum " + "fast symlink size (%u)\n", uspi->s_maxsymlinklen); + uspi->s_maxsymlinklen = maxsymlen; + } + sb->s_maxbytes = ufs_max_bytes(sb); + sb->s_max_links = UFS_LINK_MAX; + + inode = ufs_iget(sb, UFS_ROOTINO); + if (IS_ERR(inode)) { + ret = PTR_ERR(inode); + goto failed; + } + sb->s_root = d_make_root(inode); + if (!sb->s_root) { + ret = -ENOMEM; + goto failed; + } + + ufs_setup_cstotal(sb); + /* + * Read cylinder group structures + */ + if (!sb_rdonly(sb)) + if (!ufs_read_cylinder_structures(sb)) + goto failed; + + UFSD("EXIT\n"); + return 0; + +failed: + if (ubh) + ubh_brelse_uspi (uspi); + kfree (uspi); + kfree(sbi); + sb->s_fs_info = NULL; + UFSD("EXIT (FAILED)\n"); + return ret; + +failed_nomem: + UFSD("EXIT (NOMEM)\n"); + return -ENOMEM; +} + +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; + + sync_filesystem(sb); + mutex_lock(&UFS_SB(sb)->s_lock); + uspi = UFS_SB(sb)->s_uspi; + flags = UFS_SB(sb)->s_flags; + usb1 = ubh_get_usb_first(uspi); + usb3 = ubh_get_usb_third(uspi); + + /* + * 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)) { + mutex_unlock(&UFS_SB(sb)->s_lock); + return -EINVAL; + } + if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) { + new_mount_opt |= ufstype; + } else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) { + pr_err("ufstype can't be changed during remount\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); + return -EINVAL; + } + + if ((bool)(*mount_flags & SB_RDONLY) == sb_rdonly(sb)) { + UFS_SB(sb)->s_mount_opt = new_mount_opt; + mutex_unlock(&UFS_SB(sb)->s_lock); + return 0; + } + + /* + * fs was mouted as rw, remounting ro + */ + if (*mount_flags & SB_RDONLY) { + ufs_put_super_internal(sb); + usb1->fs_time = ufs_get_seconds(sb); + if ((flags & UFS_ST_MASK) == UFS_ST_SUN + || (flags & UFS_ST_MASK) == UFS_ST_SUNOS + || (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(uspi)); + sb->s_flags |= SB_RDONLY; + } else { + /* + * fs was mounted as ro, remounting rw + */ +#ifndef CONFIG_UFS_FS_WRITE + pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); + return -EINVAL; +#else + if (ufstype != UFS_MOUNT_UFSTYPE_SUN && + ufstype != UFS_MOUNT_UFSTYPE_SUNOS && + ufstype != UFS_MOUNT_UFSTYPE_44BSD && + ufstype != UFS_MOUNT_UFSTYPE_SUNx86 && + ufstype != UFS_MOUNT_UFSTYPE_UFS2) { + pr_err("this ufstype is read-only supported\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); + return -EINVAL; + } + if (!ufs_read_cylinder_structures(sb)) { + pr_err("failed during remounting\n"); + mutex_unlock(&UFS_SB(sb)->s_lock); + return -EPERM; + } + sb->s_flags &= ~SB_RDONLY; +#endif + } + UFS_SB(sb)->s_mount_opt = new_mount_opt; + mutex_unlock(&UFS_SB(sb)->s_lock); + return 0; +} + +static int ufs_show_options(struct seq_file *seq, struct dentry *root) +{ + struct ufs_sb_info *sbi = UFS_SB(root->d_sb); + unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE; + const struct match_token *tp = tokens; + + while (tp->token != Opt_onerror_panic && tp->token != mval) + ++tp; + BUG_ON(tp->token == Opt_onerror_panic); + seq_printf(seq, ",%s", tp->pattern); + + mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR; + while (tp->token != Opt_err && tp->token != mval) + ++tp; + BUG_ON(tp->token == Opt_err); + seq_printf(seq, ",%s", tp->pattern); + + return 0; +} + +static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + struct super_block *sb = dentry->d_sb; + struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi; + unsigned flags = UFS_SB(sb)->s_flags; + struct ufs_super_block_third *usb3; + u64 id = huge_encode_dev(sb->s_bdev->bd_dev); + + mutex_lock(&UFS_SB(sb)->s_lock); + usb3 = ubh_get_usb_third(uspi); + + if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) + buf->f_type = UFS2_MAGIC; + else + buf->f_type = UFS_MAGIC; + + buf->f_blocks = uspi->s_dsize; + buf->f_bfree = ufs_freefrags(uspi); + buf->f_ffree = uspi->cs_total.cs_nifree; + buf->f_bsize = sb->s_blocksize; + buf->f_bavail = (buf->f_bfree > uspi->s_root_blocks) + ? (buf->f_bfree - uspi->s_root_blocks) : 0; + buf->f_files = uspi->s_ncg * uspi->s_ipg; + buf->f_namelen = UFS_MAXNAMLEN; + buf->f_fsid.val[0] = (u32)id; + buf->f_fsid.val[1] = (u32)(id >> 32); + + mutex_unlock(&UFS_SB(sb)->s_lock); + + return 0; +} + +static struct kmem_cache * ufs_inode_cachep; + +static struct inode *ufs_alloc_inode(struct super_block *sb) +{ + struct ufs_inode_info *ei; + + ei = kmem_cache_alloc(ufs_inode_cachep, GFP_NOFS); + if (!ei) + return NULL; + + inode_set_iversion(&ei->vfs_inode, 1); + seqlock_init(&ei->meta_lock); + mutex_init(&ei->truncate_mutex); + return &ei->vfs_inode; +} + +static void ufs_i_callback(struct rcu_head *head) +{ + struct inode *inode = container_of(head, struct inode, i_rcu); + kmem_cache_free(ufs_inode_cachep, UFS_I(inode)); +} + +static void ufs_destroy_inode(struct inode *inode) +{ + call_rcu(&inode->i_rcu, ufs_i_callback); +} + +static void init_once(void *foo) +{ + struct ufs_inode_info *ei = (struct ufs_inode_info *) foo; + + inode_init_once(&ei->vfs_inode); +} + +static int __init init_inodecache(void) +{ + ufs_inode_cachep = kmem_cache_create_usercopy("ufs_inode_cache", + sizeof(struct ufs_inode_info), 0, + (SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD| + SLAB_ACCOUNT), + offsetof(struct ufs_inode_info, i_u1.i_symlink), + sizeof_field(struct ufs_inode_info, + i_u1.i_symlink), + init_once); + if (ufs_inode_cachep == NULL) + return -ENOMEM; + return 0; +} + +static void destroy_inodecache(void) +{ + /* + * Make sure all delayed rcu free inodes are flushed before we + * destroy cache. + */ + rcu_barrier(); + kmem_cache_destroy(ufs_inode_cachep); +} + +static const struct super_operations ufs_super_ops = { + .alloc_inode = ufs_alloc_inode, + .destroy_inode = ufs_destroy_inode, + .write_inode = ufs_write_inode, + .evict_inode = ufs_evict_inode, + .put_super = ufs_put_super, + .sync_fs = ufs_sync_fs, + .statfs = ufs_statfs, + .remount_fs = ufs_remount, + .show_options = ufs_show_options, +}; + +static struct dentry *ufs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + return mount_bdev(fs_type, flags, dev_name, data, ufs_fill_super); +} + +static struct file_system_type ufs_fs_type = { + .owner = THIS_MODULE, + .name = "ufs", + .mount = ufs_mount, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; +MODULE_ALIAS_FS("ufs"); + +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"); |