| /* |
| * linux/fs/hpfs/super.c |
| * |
| * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 |
| * |
| * mounting, unmounting, error handling |
| */ |
| |
| #include "hpfs_fn.h" |
| #include <linux/module.h> |
| #include <linux/parser.h> |
| #include <linux/init.h> |
| #include <linux/statfs.h> |
| #include <linux/magic.h> |
| #include <linux/sched.h> |
| #include <linux/bitmap.h> |
| #include <linux/slab.h> |
| |
| /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ |
| |
| static void mark_dirty(struct super_block *s, int remount) |
| { |
| if (hpfs_sb(s)->sb_chkdsk && (remount || !(s->s_flags & MS_RDONLY))) { |
| struct buffer_head *bh; |
| struct hpfs_spare_block *sb; |
| if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { |
| sb->dirty = 1; |
| sb->old_wrote = 0; |
| mark_buffer_dirty(bh); |
| sync_dirty_buffer(bh); |
| brelse(bh); |
| } |
| } |
| } |
| |
| /* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there |
| were errors) */ |
| |
| static void unmark_dirty(struct super_block *s) |
| { |
| struct buffer_head *bh; |
| struct hpfs_spare_block *sb; |
| if (s->s_flags & MS_RDONLY) return; |
| sync_blockdev(s->s_bdev); |
| if ((sb = hpfs_map_sector(s, 17, &bh, 0))) { |
| sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error; |
| sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error; |
| mark_buffer_dirty(bh); |
| sync_dirty_buffer(bh); |
| brelse(bh); |
| } |
| } |
| |
| /* Filesystem error... */ |
| static char err_buf[1024]; |
| |
| void hpfs_error(struct super_block *s, const char *fmt, ...) |
| { |
| va_list args; |
| |
| va_start(args, fmt); |
| vsnprintf(err_buf, sizeof(err_buf), fmt, args); |
| va_end(args); |
| |
| printk("HPFS: filesystem error: %s", err_buf); |
| if (!hpfs_sb(s)->sb_was_error) { |
| if (hpfs_sb(s)->sb_err == 2) { |
| printk("; crashing the system because you wanted it\n"); |
| mark_dirty(s, 0); |
| panic("HPFS panic"); |
| } else if (hpfs_sb(s)->sb_err == 1) { |
| if (s->s_flags & MS_RDONLY) printk("; already mounted read-only\n"); |
| else { |
| printk("; remounting read-only\n"); |
| mark_dirty(s, 0); |
| s->s_flags |= MS_RDONLY; |
| } |
| } else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n"); |
| else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); |
| } else printk("\n"); |
| hpfs_sb(s)->sb_was_error = 1; |
| } |
| |
| /* |
| * A little trick to detect cycles in many hpfs structures and don't let the |
| * kernel crash on corrupted filesystem. When first called, set c2 to 0. |
| * |
| * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories |
| * nested each in other, chkdsk locked up happilly. |
| */ |
| |
| int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2, |
| char *msg) |
| { |
| if (*c2 && *c1 == key) { |
| hpfs_error(s, "cycle detected on key %08x in %s", key, msg); |
| return 1; |
| } |
| (*c2)++; |
| if (!((*c2 - 1) & *c2)) *c1 = key; |
| return 0; |
| } |
| |
| static void hpfs_put_super(struct super_block *s) |
| { |
| struct hpfs_sb_info *sbi = hpfs_sb(s); |
| |
| hpfs_lock(s); |
| unmark_dirty(s); |
| hpfs_unlock(s); |
| |
| kfree(sbi->sb_cp_table); |
| kfree(sbi->sb_bmp_dir); |
| s->s_fs_info = NULL; |
| kfree(sbi); |
| } |
| |
| unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) |
| { |
| struct quad_buffer_head qbh; |
| unsigned long *bits; |
| unsigned count; |
| |
| bits = hpfs_map_4sectors(s, secno, &qbh, 4); |
| if (!bits) |
| return 0; |
| count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); |
| hpfs_brelse4(&qbh); |
| return count; |
| } |
| |
| static unsigned count_bitmaps(struct super_block *s) |
| { |
| unsigned n, count, n_bands; |
| n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14; |
| count = 0; |
| for (n = 0; n < n_bands; n++) |
| count += hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n])); |
| return count; |
| } |
| |
| static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
| { |
| struct super_block *s = dentry->d_sb; |
| struct hpfs_sb_info *sbi = hpfs_sb(s); |
| u64 id = huge_encode_dev(s->s_bdev->bd_dev); |
| hpfs_lock(s); |
| |
| /*if (sbi->sb_n_free == -1) {*/ |
| sbi->sb_n_free = count_bitmaps(s); |
| sbi->sb_n_free_dnodes = hpfs_count_one_bitmap(s, sbi->sb_dmap); |
| /*}*/ |
| buf->f_type = s->s_magic; |
| buf->f_bsize = 512; |
| buf->f_blocks = sbi->sb_fs_size; |
| buf->f_bfree = sbi->sb_n_free; |
| buf->f_bavail = sbi->sb_n_free; |
| buf->f_files = sbi->sb_dirband_size / 4; |
| buf->f_ffree = sbi->sb_n_free_dnodes; |
| buf->f_fsid.val[0] = (u32)id; |
| buf->f_fsid.val[1] = (u32)(id >> 32); |
| buf->f_namelen = 254; |
| |
| hpfs_unlock(s); |
| |
| return 0; |
| } |
| |
| static struct kmem_cache * hpfs_inode_cachep; |
| |
| static struct inode *hpfs_alloc_inode(struct super_block *sb) |
| { |
| struct hpfs_inode_info *ei; |
| ei = (struct hpfs_inode_info *)kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); |
| if (!ei) |
| return NULL; |
| ei->vfs_inode.i_version = 1; |
| return &ei->vfs_inode; |
| } |
| |
| static void hpfs_i_callback(struct rcu_head *head) |
| { |
| struct inode *inode = container_of(head, struct inode, i_rcu); |
| kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); |
| } |
| |
| static void hpfs_destroy_inode(struct inode *inode) |
| { |
| call_rcu(&inode->i_rcu, hpfs_i_callback); |
| } |
| |
| static void init_once(void *foo) |
| { |
| struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; |
| |
| inode_init_once(&ei->vfs_inode); |
| } |
| |
| static int init_inodecache(void) |
| { |
| hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", |
| sizeof(struct hpfs_inode_info), |
| 0, (SLAB_RECLAIM_ACCOUNT| |
| SLAB_MEM_SPREAD), |
| init_once); |
| if (hpfs_inode_cachep == NULL) |
| return -ENOMEM; |
| return 0; |
| } |
| |
| static void destroy_inodecache(void) |
| { |
| kmem_cache_destroy(hpfs_inode_cachep); |
| } |
| |
| /* |
| * A tiny parser for option strings, stolen from dosfs. |
| * Stolen again from read-only hpfs. |
| * And updated for table-driven option parsing. |
| */ |
| |
| enum { |
| Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis, |
| Opt_check_none, Opt_check_normal, Opt_check_strict, |
| Opt_err_cont, Opt_err_ro, Opt_err_panic, |
| Opt_eas_no, Opt_eas_ro, Opt_eas_rw, |
| Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always, |
| Opt_timeshift, Opt_err, |
| }; |
| |
| static const match_table_t tokens = { |
| {Opt_help, "help"}, |
| {Opt_uid, "uid=%u"}, |
| {Opt_gid, "gid=%u"}, |
| {Opt_umask, "umask=%o"}, |
| {Opt_case_lower, "case=lower"}, |
| {Opt_case_asis, "case=asis"}, |
| {Opt_check_none, "check=none"}, |
| {Opt_check_normal, "check=normal"}, |
| {Opt_check_strict, "check=strict"}, |
| {Opt_err_cont, "errors=continue"}, |
| {Opt_err_ro, "errors=remount-ro"}, |
| {Opt_err_panic, "errors=panic"}, |
| {Opt_eas_no, "eas=no"}, |
| {Opt_eas_ro, "eas=ro"}, |
| {Opt_eas_rw, "eas=rw"}, |
| {Opt_chkdsk_no, "chkdsk=no"}, |
| {Opt_chkdsk_errors, "chkdsk=errors"}, |
| {Opt_chkdsk_always, "chkdsk=always"}, |
| {Opt_timeshift, "timeshift=%d"}, |
| {Opt_err, NULL}, |
| }; |
| |
| static int parse_opts(char *opts, uid_t *uid, gid_t *gid, umode_t *umask, |
| int *lowercase, int *eas, int *chk, int *errs, |
| int *chkdsk, int *timeshift) |
| { |
| char *p; |
| int option; |
| |
| if (!opts) |
| return 1; |
| |
| /*printk("Parsing opts: '%s'\n",opts);*/ |
| |
| while ((p = strsep(&opts, ",")) != NULL) { |
| substring_t args[MAX_OPT_ARGS]; |
| int token; |
| if (!*p) |
| continue; |
| |
| token = match_token(p, tokens, args); |
| switch (token) { |
| case Opt_help: |
| return 2; |
| case Opt_uid: |
| if (match_int(args, &option)) |
| return 0; |
| *uid = option; |
| break; |
| case Opt_gid: |
| if (match_int(args, &option)) |
| return 0; |
| *gid = option; |
| break; |
| case Opt_umask: |
| if (match_octal(args, &option)) |
| return 0; |
| *umask = option; |
| break; |
| case Opt_case_lower: |
| *lowercase = 1; |
| break; |
| case Opt_case_asis: |
| *lowercase = 0; |
| break; |
| case Opt_check_none: |
| *chk = 0; |
| break; |
| case Opt_check_normal: |
| *chk = 1; |
| break; |
| case Opt_check_strict: |
| *chk = 2; |
| break; |
| case Opt_err_cont: |
| *errs = 0; |
| break; |
| case Opt_err_ro: |
| *errs = 1; |
| break; |
| case Opt_err_panic: |
| *errs = 2; |
| break; |
| case Opt_eas_no: |
| *eas = 0; |
| break; |
| case Opt_eas_ro: |
| *eas = 1; |
| break; |
| case Opt_eas_rw: |
| *eas = 2; |
| break; |
| case Opt_chkdsk_no: |
| *chkdsk = 0; |
| break; |
| case Opt_chkdsk_errors: |
| *chkdsk = 1; |
| break; |
| case Opt_chkdsk_always: |
| *chkdsk = 2; |
| break; |
| case Opt_timeshift: |
| { |
| int m = 1; |
| char *rhs = args[0].from; |
| if (!rhs || !*rhs) |
| return 0; |
| if (*rhs == '-') m = -1; |
| if (*rhs == '+' || *rhs == '-') rhs++; |
| *timeshift = simple_strtoul(rhs, &rhs, 0) * m; |
| if (*rhs) |
| return 0; |
| break; |
| } |
| default: |
| return 0; |
| } |
| } |
| return 1; |
| } |
| |
| static inline void hpfs_help(void) |
| { |
| printk("\n\ |
| HPFS filesystem options:\n\ |
| help do not mount and display this text\n\ |
| uid=xxx set uid of files that don't have uid specified in eas\n\ |
| gid=xxx set gid of files that don't have gid specified in eas\n\ |
| umask=xxx set mode of files that don't have mode specified in eas\n\ |
| case=lower lowercase all files\n\ |
| case=asis do not lowercase files (default)\n\ |
| check=none no fs checks - kernel may crash on corrupted filesystem\n\ |
| check=normal do some checks - it should not crash (default)\n\ |
| check=strict do extra time-consuming checks, used for debugging\n\ |
| errors=continue continue on errors\n\ |
| errors=remount-ro remount read-only if errors found (default)\n\ |
| errors=panic panic on errors\n\ |
| chkdsk=no do not mark fs for chkdsking even if there were errors\n\ |
| chkdsk=errors mark fs dirty if errors found (default)\n\ |
| chkdsk=always always mark fs dirty - used for debugging\n\ |
| eas=no ignore extended attributes\n\ |
| eas=ro read but do not write extended attributes\n\ |
| eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\ |
| timeshift=nnn add nnn seconds to file times\n\ |
| \n"); |
| } |
| |
| static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) |
| { |
| uid_t uid; |
| gid_t gid; |
| umode_t umask; |
| int lowercase, eas, chk, errs, chkdsk, timeshift; |
| int o; |
| struct hpfs_sb_info *sbi = hpfs_sb(s); |
| char *new_opts = kstrdup(data, GFP_KERNEL); |
| |
| *flags |= MS_NOATIME; |
| |
| hpfs_lock(s); |
| lock_super(s); |
| uid = sbi->sb_uid; gid = sbi->sb_gid; |
| umask = 0777 & ~sbi->sb_mode; |
| lowercase = sbi->sb_lowercase; |
| eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; |
| errs = sbi->sb_err; timeshift = sbi->sb_timeshift; |
| |
| if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, |
| &eas, &chk, &errs, &chkdsk, ×hift))) { |
| printk("HPFS: bad mount options.\n"); |
| goto out_err; |
| } |
| if (o == 2) { |
| hpfs_help(); |
| goto out_err; |
| } |
| if (timeshift != sbi->sb_timeshift) { |
| printk("HPFS: timeshift can't be changed using remount.\n"); |
| goto out_err; |
| } |
| |
| unmark_dirty(s); |
| |
| sbi->sb_uid = uid; sbi->sb_gid = gid; |
| sbi->sb_mode = 0777 & ~umask; |
| sbi->sb_lowercase = lowercase; |
| sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; |
| sbi->sb_err = errs; sbi->sb_timeshift = timeshift; |
| |
| if (!(*flags & MS_RDONLY)) mark_dirty(s, 1); |
| |
| replace_mount_options(s, new_opts); |
| |
| unlock_super(s); |
| hpfs_unlock(s); |
| return 0; |
| |
| out_err: |
| unlock_super(s); |
| hpfs_unlock(s); |
| kfree(new_opts); |
| return -EINVAL; |
| } |
| |
| /* Super operations */ |
| |
| static const struct super_operations hpfs_sops = |
| { |
| .alloc_inode = hpfs_alloc_inode, |
| .destroy_inode = hpfs_destroy_inode, |
| .evict_inode = hpfs_evict_inode, |
| .put_super = hpfs_put_super, |
| .statfs = hpfs_statfs, |
| .remount_fs = hpfs_remount_fs, |
| .show_options = generic_show_options, |
| }; |
| |
| static int hpfs_fill_super(struct super_block *s, void *options, int silent) |
| { |
| struct buffer_head *bh0, *bh1, *bh2; |
| struct hpfs_boot_block *bootblock; |
| struct hpfs_super_block *superblock; |
| struct hpfs_spare_block *spareblock; |
| struct hpfs_sb_info *sbi; |
| struct inode *root; |
| |
| uid_t uid; |
| gid_t gid; |
| umode_t umask; |
| int lowercase, eas, chk, errs, chkdsk, timeshift; |
| |
| dnode_secno root_dno; |
| struct hpfs_dirent *de = NULL; |
| struct quad_buffer_head qbh; |
| |
| int o; |
| |
| save_mount_options(s, options); |
| |
| sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
| if (!sbi) { |
| return -ENOMEM; |
| } |
| s->s_fs_info = sbi; |
| |
| sbi->sb_bmp_dir = NULL; |
| sbi->sb_cp_table = NULL; |
| |
| mutex_init(&sbi->hpfs_mutex); |
| hpfs_lock(s); |
| |
| uid = current_uid(); |
| gid = current_gid(); |
| umask = current_umask(); |
| lowercase = 0; |
| eas = 2; |
| chk = 1; |
| errs = 1; |
| chkdsk = 1; |
| timeshift = 0; |
| |
| if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, |
| &eas, &chk, &errs, &chkdsk, ×hift))) { |
| printk("HPFS: bad mount options.\n"); |
| goto bail0; |
| } |
| if (o==2) { |
| hpfs_help(); |
| goto bail0; |
| } |
| |
| /*sbi->sb_mounting = 1;*/ |
| sb_set_blocksize(s, 512); |
| sbi->sb_fs_size = -1; |
| if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1; |
| if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2; |
| if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3; |
| |
| /* Check magics */ |
| if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC |
| ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC |
| || le32_to_cpu(spareblock->magic) != SP_MAGIC) { |
| if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n"); |
| goto bail4; |
| } |
| |
| /* Check version */ |
| if (!(s->s_flags & MS_RDONLY) && |
| superblock->funcversion != 2 && superblock->funcversion != 3) { |
| printk("HPFS: Bad version %d,%d. Mount readonly to go around\n", |
| (int)superblock->version, (int)superblock->funcversion); |
| printk("HPFS: please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - mikulas@artax.karlin.mff.cuni.cz\n"); |
| goto bail4; |
| } |
| |
| s->s_flags |= MS_NOATIME; |
| |
| /* Fill superblock stuff */ |
| s->s_magic = HPFS_SUPER_MAGIC; |
| s->s_op = &hpfs_sops; |
| s->s_d_op = &hpfs_dentry_operations; |
| |
| sbi->sb_root = le32_to_cpu(superblock->root); |
| sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors); |
| sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps); |
| sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start); |
| sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band); |
| sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap); |
| sbi->sb_uid = uid; |
| sbi->sb_gid = gid; |
| sbi->sb_mode = 0777 & ~umask; |
| sbi->sb_n_free = -1; |
| sbi->sb_n_free_dnodes = -1; |
| sbi->sb_lowercase = lowercase; |
| sbi->sb_eas = eas; |
| sbi->sb_chk = chk; |
| sbi->sb_chkdsk = chkdsk; |
| sbi->sb_err = errs; |
| sbi->sb_timeshift = timeshift; |
| sbi->sb_was_error = 0; |
| sbi->sb_cp_table = NULL; |
| sbi->sb_c_bitmap = -1; |
| sbi->sb_max_fwd_alloc = 0xffffff; |
| |
| /* Load bitmap directory */ |
| if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps)))) |
| goto bail4; |
| |
| /* Check for general fs errors*/ |
| if (spareblock->dirty && !spareblock->old_wrote) { |
| if (errs == 2) { |
| printk("HPFS: Improperly stopped, not mounted\n"); |
| goto bail4; |
| } |
| hpfs_error(s, "improperly stopped"); |
| } |
| |
| if (!(s->s_flags & MS_RDONLY)) { |
| spareblock->dirty = 1; |
| spareblock->old_wrote = 0; |
| mark_buffer_dirty(bh2); |
| } |
| |
| if (spareblock->hotfixes_used || le32_to_cpu(spareblock->n_spares_used)) { |
| if (errs >= 2) { |
| printk("HPFS: Hotfixes not supported here, try chkdsk\n"); |
| mark_dirty(s, 0); |
| goto bail4; |
| } |
| hpfs_error(s, "hotfixes not supported here, try chkdsk"); |
| if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n"); |
| else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n"); |
| } |
| if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { |
| if (errs >= 2) { |
| printk("HPFS: Spare dnodes used, try chkdsk\n"); |
| mark_dirty(s, 0); |
| goto bail4; |
| } |
| hpfs_error(s, "warning: spare dnodes used, try chkdsk"); |
| if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n"); |
| } |
| if (chk) { |
| unsigned a; |
| if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) || |
| le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) { |
| hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", |
| le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band)); |
| goto bail4; |
| } |
| a = sbi->sb_dirband_size; |
| sbi->sb_dirband_size = 0; |
| if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") || |
| hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") || |
| hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) { |
| mark_dirty(s, 0); |
| goto bail4; |
| } |
| sbi->sb_dirband_size = a; |
| } else printk("HPFS: You really don't want any checks? You are crazy...\n"); |
| |
| /* Load code page table */ |
| if (le32_to_cpu(spareblock->n_code_pages)) |
| if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir)))) |
| printk("HPFS: Warning: code page support is disabled\n"); |
| |
| brelse(bh2); |
| brelse(bh1); |
| brelse(bh0); |
| |
| root = iget_locked(s, sbi->sb_root); |
| if (!root) |
| goto bail0; |
| hpfs_init_inode(root); |
| hpfs_read_inode(root); |
| unlock_new_inode(root); |
| s->s_root = d_make_root(root); |
| if (!s->s_root) |
| goto bail0; |
| |
| /* |
| * find the root directory's . pointer & finish filling in the inode |
| */ |
| |
| root_dno = hpfs_fnode_dno(s, sbi->sb_root); |
| if (root_dno) |
| de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh); |
| if (!de) |
| hpfs_error(s, "unable to find root dir"); |
| else { |
| root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date)); |
| root->i_atime.tv_nsec = 0; |
| root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date)); |
| root->i_mtime.tv_nsec = 0; |
| root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date)); |
| root->i_ctime.tv_nsec = 0; |
| hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size); |
| hpfs_i(root)->i_parent_dir = root->i_ino; |
| if (root->i_size == -1) |
| root->i_size = 2048; |
| if (root->i_blocks == -1) |
| root->i_blocks = 5; |
| hpfs_brelse4(&qbh); |
| } |
| hpfs_unlock(s); |
| return 0; |
| |
| bail4: brelse(bh2); |
| bail3: brelse(bh1); |
| bail2: brelse(bh0); |
| bail1: |
| bail0: |
| hpfs_unlock(s); |
| kfree(sbi->sb_bmp_dir); |
| kfree(sbi->sb_cp_table); |
| s->s_fs_info = NULL; |
| kfree(sbi); |
| return -EINVAL; |
| } |
| |
| static struct dentry *hpfs_mount(struct file_system_type *fs_type, |
| int flags, const char *dev_name, void *data) |
| { |
| return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); |
| } |
| |
| static struct file_system_type hpfs_fs_type = { |
| .owner = THIS_MODULE, |
| .name = "hpfs", |
| .mount = hpfs_mount, |
| .kill_sb = kill_block_super, |
| .fs_flags = FS_REQUIRES_DEV, |
| }; |
| |
| static int __init init_hpfs_fs(void) |
| { |
| int err = init_inodecache(); |
| if (err) |
| goto out1; |
| err = register_filesystem(&hpfs_fs_type); |
| if (err) |
| goto out; |
| return 0; |
| out: |
| destroy_inodecache(); |
| out1: |
| return err; |
| } |
| |
| static void __exit exit_hpfs_fs(void) |
| { |
| unregister_filesystem(&hpfs_fs_type); |
| destroy_inodecache(); |
| } |
| |
| module_init(init_hpfs_fs) |
| module_exit(exit_hpfs_fs) |
| MODULE_LICENSE("GPL"); |