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fs/hpfs/super.c
19.4 KB
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/* * 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> |
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#include <linux/magic.h> |
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#include <linux/sched.h> |
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#include <linux/bitmap.h> |
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#include <linux/slab.h> |
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/* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ |
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static void mark_dirty(struct super_block *s, int remount) |
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{ |
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if (hpfs_sb(s)->sb_chkdsk && (remount || !(s->s_flags & MS_RDONLY))) { |
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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); |
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sync_dirty_buffer(bh); |
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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; |
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sync_blockdev(s->s_bdev); |
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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); |
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sync_dirty_buffer(bh); |
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brelse(bh); } } /* Filesystem error... */ |
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void hpfs_error(struct super_block *s, const char *fmt, ...) |
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{ |
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struct va_format vaf; |
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va_list args; va_start(args, fmt); |
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vaf.fmt = fmt; vaf.va = &args; pr_err("filesystem error: %pV", &vaf); |
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va_end(args); |
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if (!hpfs_sb(s)->sb_was_error) { if (hpfs_sb(s)->sb_err == 2) { |
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pr_cont("; crashing the system because you wanted it "); |
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mark_dirty(s, 0); |
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panic("HPFS panic"); } else if (hpfs_sb(s)->sb_err == 1) { |
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if (s->s_flags & MS_RDONLY) pr_cont("; already mounted read-only "); |
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else { |
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pr_cont("; remounting read-only "); |
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mark_dirty(s, 0); |
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s->s_flags |= MS_RDONLY; } |
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} else if (s->s_flags & MS_RDONLY) pr_cont("; going on - but anything won't be destroyed because it's read-only "); else pr_cont("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so! "); } else pr_cont(" "); |
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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; } |
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static void free_sbi(struct hpfs_sb_info *sbi) |
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{ |
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kfree(sbi->sb_cp_table); kfree(sbi->sb_bmp_dir); kfree(sbi); } |
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|
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static void lazy_free_sbi(struct rcu_head *rcu) { free_sbi(container_of(rcu, struct hpfs_sb_info, rcu)); } static void hpfs_put_super(struct super_block *s) { |
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hpfs_lock(s); unmark_dirty(s); hpfs_unlock(s); |
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call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi); |
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} |
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static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) |
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{ struct quad_buffer_head qbh; |
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unsigned long *bits; unsigned count; |
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bits = hpfs_map_4sectors(s, secno, &qbh, 0); |
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if (!bits) |
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return (unsigned)-1; |
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count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); |
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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; |
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for (n = 0; n < COUNT_RD_AHEAD; n++) { hpfs_prefetch_bitmap(s, n); } for (n = 0; n < n_bands; n++) { |
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unsigned c; |
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hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD); |
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c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n])); if (c != (unsigned)-1) count += c; |
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} |
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return count; } |
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unsigned hpfs_get_free_dnodes(struct super_block *s) { struct hpfs_sb_info *sbi = hpfs_sb(s); if (sbi->sb_n_free_dnodes == (unsigned)-1) { unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap); if (c == (unsigned)-1) return 0; sbi->sb_n_free_dnodes = c; } return sbi->sb_n_free_dnodes; } |
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static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
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{ |
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struct super_block *s = dentry->d_sb; |
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struct hpfs_sb_info *sbi = hpfs_sb(s); |
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u64 id = huge_encode_dev(s->s_bdev->bd_dev); |
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|
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hpfs_lock(s); |
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|
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if (sbi->sb_n_free == (unsigned)-1) |
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sbi->sb_n_free = count_bitmaps(s); |
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|
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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; |
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buf->f_ffree = hpfs_get_free_dnodes(s); |
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buf->f_fsid.val[0] = (u32)id; buf->f_fsid.val[1] = (u32)(id >> 32); |
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buf->f_namelen = 254; |
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hpfs_unlock(s); |
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return 0; } |
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long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg) { switch (cmd) { case FITRIM: { struct fstrim_range range; secno n_trimmed; int r; if (!capable(CAP_SYS_ADMIN)) return -EPERM; if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range))) return -EFAULT; r = hpfs_trim_fs(file_inode(file)->i_sb, range.start >> 9, (range.start + range.len) >> 9, (range.minlen + 511) >> 9, &n_trimmed); if (r) return r; range.len = (u64)n_trimmed << 9; if (copy_to_user((struct fstrim_range __user *)arg, &range, sizeof(range))) return -EFAULT; return 0; } default: { return -ENOIOCTLCMD; } } } |
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static struct kmem_cache * hpfs_inode_cachep; |
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static struct inode *hpfs_alloc_inode(struct super_block *sb) { struct hpfs_inode_info *ei; |
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ei = kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); |
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if (!ei) return NULL; ei->vfs_inode.i_version = 1; return &ei->vfs_inode; } |
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static void hpfs_i_callback(struct rcu_head *head) |
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{ |
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struct inode *inode = container_of(head, struct inode, i_rcu); |
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kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode)); } |
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static void hpfs_destroy_inode(struct inode *inode) { call_rcu(&inode->i_rcu, hpfs_i_callback); } |
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static void init_once(void *foo) |
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{ struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; |
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inode_init_once(&ei->vfs_inode); |
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} |
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|
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static int init_inodecache(void) { hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache", sizeof(struct hpfs_inode_info), |
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0, (SLAB_RECLAIM_ACCOUNT| SLAB_MEM_SPREAD), |
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init_once); |
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if (hpfs_inode_cachep == NULL) return -ENOMEM; return 0; } static void destroy_inodecache(void) { |
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/* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); |
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kmem_cache_destroy(hpfs_inode_cachep); |
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} /* * 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, |
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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, }; |
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static const match_table_t tokens = { |
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{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"}, |
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{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}, }; |
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static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask, |
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int *lowercase, int *eas, int *chk, int *errs, |
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int *chkdsk, int *timeshift) { char *p; int option; if (!opts) return 1; |
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/*pr_info("Parsing opts: '%s' ",opts);*/ |
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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; |
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*uid = make_kuid(current_user_ns(), option); if (!uid_valid(*uid)) return 0; |
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break; case Opt_gid: if (match_int(args, &option)) return 0; |
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*gid = make_kgid(current_user_ns(), option); if (!gid_valid(*gid)) return 0; |
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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; |
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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) { |
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pr_info(" \ |
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HPFS filesystem options: \ help do not mount and display this text \ uid=xxx set uid of files that don't have uid specified in eas \ gid=xxx set gid of files that don't have gid specified in eas \ umask=xxx set mode of files that don't have mode specified in eas \ case=lower lowercase all files \ case=asis do not lowercase files (default) \ |
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check=none no fs checks - kernel may crash on corrupted filesystem \ check=normal do some checks - it should not crash (default) \ check=strict do extra time-consuming checks, used for debugging \ errors=continue continue on errors \ errors=remount-ro remount read-only if errors found (default) \ errors=panic panic on errors \ chkdsk=no do not mark fs for chkdsking even if there were errors \ chkdsk=errors mark fs dirty if errors found (default) \ chkdsk=always always mark fs dirty - used for debugging \ eas=no ignore extended attributes \ eas=ro read but do not write extended attributes \ eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default) \ timeshift=nnn add nnn seconds to file times \ "); } static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) { |
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kuid_t uid; kgid_t gid; |
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umode_t umask; |
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int lowercase, eas, chk, errs, chkdsk, timeshift; |
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int o; struct hpfs_sb_info *sbi = hpfs_sb(s); |
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char *new_opts = kstrdup(data, GFP_KERNEL); |
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|
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if (data && !new_opts) |
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return -ENOMEM; |
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sync_filesystem(s); |
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*flags |= MS_NOATIME; |
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|
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hpfs_lock(s); |
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uid = sbi->sb_uid; gid = sbi->sb_gid; umask = 0777 & ~sbi->sb_mode; |
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lowercase = sbi->sb_lowercase; |
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eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk; errs = sbi->sb_err; timeshift = sbi->sb_timeshift; |
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if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase, |
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&eas, &chk, &errs, &chkdsk, ×hift))) { |
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pr_err("bad mount options. "); |
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goto out_err; |
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} if (o == 2) { hpfs_help(); |
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goto out_err; |
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} if (timeshift != sbi->sb_timeshift) { |
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pr_err("timeshift can't be changed using remount. "); |
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goto out_err; |
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} unmark_dirty(s); sbi->sb_uid = uid; sbi->sb_gid = gid; sbi->sb_mode = 0777 & ~umask; |
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sbi->sb_lowercase = lowercase; |
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sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk; sbi->sb_err = errs; sbi->sb_timeshift = timeshift; |
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if (!(*flags & MS_RDONLY)) mark_dirty(s, 1); |
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|
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if (new_opts) replace_mount_options(s, new_opts); |
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|
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507 |
hpfs_unlock(s); |
1da177e4c Linux-2.6.12-rc2 |
508 |
return 0; |
6d9c1fd42 mount options: fi... |
509 510 |
out_err: |
9a311b96c hpfs: remove the BKL |
511 |
hpfs_unlock(s); |
6d9c1fd42 mount options: fi... |
512 513 |
kfree(new_opts); return -EINVAL; |
1da177e4c Linux-2.6.12-rc2 |
514 515 516 |
} /* Super operations */ |
ee9b6d61a [PATCH] Mark stru... |
517 |
static const struct super_operations hpfs_sops = |
1da177e4c Linux-2.6.12-rc2 |
518 519 520 |
{ .alloc_inode = hpfs_alloc_inode, .destroy_inode = hpfs_destroy_inode, |
ea5440092 switch hpfs to ->... |
521 |
.evict_inode = hpfs_evict_inode, |
1da177e4c Linux-2.6.12-rc2 |
522 523 524 |
.put_super = hpfs_put_super, .statfs = hpfs_statfs, .remount_fs = hpfs_remount_fs, |
6d9c1fd42 mount options: fi... |
525 |
.show_options = generic_show_options, |
1da177e4c Linux-2.6.12-rc2 |
526 527 528 529 530 531 532 533 534 535 |
}; 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; |
0e1a43c71 userns: Convert h... |
536 537 |
kuid_t uid; kgid_t gid; |
1da177e4c Linux-2.6.12-rc2 |
538 |
umode_t umask; |
0fe105aa2 HPFS: Remove CR/L... |
539 |
int lowercase, eas, chk, errs, chkdsk, timeshift; |
1da177e4c Linux-2.6.12-rc2 |
540 541 542 543 544 545 |
dnode_secno root_dno; struct hpfs_dirent *de = NULL; struct quad_buffer_head qbh; int o; |
6d9c1fd42 mount options: fi... |
546 |
save_mount_options(s, options); |
f8314dc60 [PATCH] fs: Conve... |
547 |
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); |
db7192221 BKL: Explicitly a... |
548 |
if (!sbi) { |
1da177e4c Linux-2.6.12-rc2 |
549 |
return -ENOMEM; |
db7192221 BKL: Explicitly a... |
550 |
} |
1da177e4c Linux-2.6.12-rc2 |
551 |
s->s_fs_info = sbi; |
1da177e4c Linux-2.6.12-rc2 |
552 |
|
7dd29d8d8 HPFS: Introduce a... |
553 554 |
mutex_init(&sbi->hpfs_mutex); hpfs_lock(s); |
de395b8ac CRED: Wrap task c... |
555 556 |
uid = current_uid(); gid = current_gid(); |
ce3b0f8d5 New helper - curr... |
557 |
umask = current_umask(); |
1da177e4c Linux-2.6.12-rc2 |
558 |
lowercase = 0; |
1da177e4c Linux-2.6.12-rc2 |
559 560 561 562 563 |
eas = 2; chk = 1; errs = 1; chkdsk = 1; timeshift = 0; |
0fe105aa2 HPFS: Remove CR/L... |
564 |
if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, |
1da177e4c Linux-2.6.12-rc2 |
565 |
&eas, &chk, &errs, &chkdsk, ×hift))) { |
a19189e55 fs/hpfs: increase... |
566 567 |
pr_err("bad mount options. "); |
1da177e4c Linux-2.6.12-rc2 |
568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 |
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 */ |
0b69760be HPFS: Fix endiani... |
583 584 585 |
if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC || le32_to_cpu(spareblock->magic) != SP_MAGIC) { |
b7cb1ce22 fs/hpfs: convert ... |
586 |
if (!silent) |
a19189e55 fs/hpfs: increase... |
587 588 |
pr_err("Bad magic ... probably not HPFS "); |
1da177e4c Linux-2.6.12-rc2 |
589 590 591 592 593 594 |
goto bail4; } /* Check version */ if (!(s->s_flags & MS_RDONLY) && superblock->funcversion != 2 && superblock->funcversion != 3) { |
a19189e55 fs/hpfs: increase... |
595 596 |
pr_err("Bad version %d,%d. Mount readonly to go around ", |
1da177e4c Linux-2.6.12-rc2 |
597 |
(int)superblock->version, (int)superblock->funcversion); |
a19189e55 fs/hpfs: increase... |
598 599 |
pr_err("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 "); |
1da177e4c Linux-2.6.12-rc2 |
600 601 602 603 604 605 606 607 |
goto bail4; } s->s_flags |= MS_NOATIME; /* Fill superblock stuff */ s->s_magic = HPFS_SUPER_MAGIC; s->s_op = &hpfs_sops; |
43d344d77 switch hpfs |
608 |
s->s_d_op = &hpfs_dentry_operations; |
1da177e4c Linux-2.6.12-rc2 |
609 |
|
0b69760be HPFS: Fix endiani... |
610 611 612 613 614 615 |
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); |
1da177e4c Linux-2.6.12-rc2 |
616 617 618 619 620 621 |
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; |
1da177e4c Linux-2.6.12-rc2 |
622 623 624 625 626 627 628 629 630 |
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; |
3ebacb050 hpfs: better test... |
631 632 633 634 635 636 |
if (sbi->sb_fs_size >= 0x80000000) { hpfs_error(s, "invalid size in superblock: %08x", (unsigned)sbi->sb_fs_size); goto bail4; } |
a64eefaac hpfs: support hot... |
637 638 |
if (spareblock->n_spares_used) hpfs_load_hotfix_map(s, spareblock); |
1da177e4c Linux-2.6.12-rc2 |
639 |
/* Load bitmap directory */ |
0b69760be HPFS: Fix endiani... |
640 |
if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps)))) |
1da177e4c Linux-2.6.12-rc2 |
641 642 643 644 645 |
goto bail4; /* Check for general fs errors*/ if (spareblock->dirty && !spareblock->old_wrote) { if (errs == 2) { |
a19189e55 fs/hpfs: increase... |
646 647 |
pr_err("Improperly stopped, not mounted "); |
1da177e4c Linux-2.6.12-rc2 |
648 649 650 651 652 653 654 655 656 657 |
goto bail4; } hpfs_error(s, "improperly stopped"); } if (!(s->s_flags & MS_RDONLY)) { spareblock->dirty = 1; spareblock->old_wrote = 0; mark_buffer_dirty(bh2); } |
0b69760be HPFS: Fix endiani... |
658 |
if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { |
1da177e4c Linux-2.6.12-rc2 |
659 |
if (errs >= 2) { |
a19189e55 fs/hpfs: increase... |
660 661 |
pr_err("Spare dnodes used, try chkdsk "); |
dab4c82a6 HPFS: Fix a bug t... |
662 |
mark_dirty(s, 0); |
1da177e4c Linux-2.6.12-rc2 |
663 664 665 |
goto bail4; } hpfs_error(s, "warning: spare dnodes used, try chkdsk"); |
b7cb1ce22 fs/hpfs: convert ... |
666 |
if (errs == 0) |
a19189e55 fs/hpfs: increase... |
667 668 |
pr_err("Proceeding, but your filesystem could be corrupted if you delete files or directories "); |
1da177e4c Linux-2.6.12-rc2 |
669 670 671 |
} if (chk) { unsigned a; |
0b69760be HPFS: Fix endiani... |
672 673 |
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) { |
1da177e4c Linux-2.6.12-rc2 |
674 |
hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x", |
0b69760be HPFS: Fix endiani... |
675 |
le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band)); |
1da177e4c Linux-2.6.12-rc2 |
676 677 678 679 |
goto bail4; } a = sbi->sb_dirband_size; sbi->sb_dirband_size = 0; |
0b69760be HPFS: Fix endiani... |
680 681 682 |
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")) { |
dab4c82a6 HPFS: Fix a bug t... |
683 |
mark_dirty(s, 0); |
1da177e4c Linux-2.6.12-rc2 |
684 685 686 |
goto bail4; } sbi->sb_dirband_size = a; |
b7cb1ce22 fs/hpfs: convert ... |
687 |
} else |
a19189e55 fs/hpfs: increase... |
688 689 |
pr_err("You really don't want any checks? You are crazy... "); |
1da177e4c Linux-2.6.12-rc2 |
690 691 |
/* Load code page table */ |
0b69760be HPFS: Fix endiani... |
692 693 |
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)))) |
a19189e55 fs/hpfs: increase... |
694 695 |
pr_err("code page support is disabled "); |
1da177e4c Linux-2.6.12-rc2 |
696 697 698 699 700 701 702 703 704 705 706 |
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); |
48fde701a switch open-coded... |
707 708 |
s->s_root = d_make_root(root); if (!s->s_root) |
1da177e4c Linux-2.6.12-rc2 |
709 |
goto bail0; |
1da177e4c Linux-2.6.12-rc2 |
710 711 712 713 714 715 716 717 718 719 720 |
/* * 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 { |
0b69760be HPFS: Fix endiani... |
721 |
root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date)); |
1da177e4c Linux-2.6.12-rc2 |
722 |
root->i_atime.tv_nsec = 0; |
0b69760be HPFS: Fix endiani... |
723 |
root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date)); |
1da177e4c Linux-2.6.12-rc2 |
724 |
root->i_mtime.tv_nsec = 0; |
0b69760be HPFS: Fix endiani... |
725 |
root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date)); |
1da177e4c Linux-2.6.12-rc2 |
726 |
root->i_ctime.tv_nsec = 0; |
de5e2b362 hpfs: endianness ... |
727 |
hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size); |
1da177e4c Linux-2.6.12-rc2 |
728 729 730 731 732 733 734 |
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); } |
7dd29d8d8 HPFS: Introduce a... |
735 |
hpfs_unlock(s); |
1da177e4c Linux-2.6.12-rc2 |
736 737 738 739 740 741 742 |
return 0; bail4: brelse(bh2); bail3: brelse(bh1); bail2: brelse(bh0); bail1: bail0: |
7dd29d8d8 HPFS: Introduce a... |
743 |
hpfs_unlock(s); |
30687e0a4 hpfs: make freein... |
744 |
free_sbi(sbi); |
1da177e4c Linux-2.6.12-rc2 |
745 746 |
return -EINVAL; } |
152a08366 new helper: mount... |
747 748 |
static struct dentry *hpfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) |
1da177e4c Linux-2.6.12-rc2 |
749 |
{ |
152a08366 new helper: mount... |
750 |
return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super); |
1da177e4c Linux-2.6.12-rc2 |
751 752 753 754 755 |
} static struct file_system_type hpfs_fs_type = { .owner = THIS_MODULE, .name = "hpfs", |
152a08366 new helper: mount... |
756 |
.mount = hpfs_mount, |
1da177e4c Linux-2.6.12-rc2 |
757 758 759 |
.kill_sb = kill_block_super, .fs_flags = FS_REQUIRES_DEV, }; |
3e64fe5b2 fs: Limit sys_mou... |
760 |
MODULE_ALIAS_FS("hpfs"); |
1da177e4c Linux-2.6.12-rc2 |
761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 |
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"); |