cregit-Linux how code gets into the kernel

Release 4.18 fs/hpfs/super.c

Directory: fs/hpfs
/*
 *  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>
#include <linux/seq_file.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 || !sb_rdonly(s))) { 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); } } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7379.35%120.00%
Mikulas Patocka1213.04%240.00%
Brian Gerst44.35%120.00%
David Howells33.26%120.00%
Total92100.00%5100.00%

/* 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 (sb_rdonly(s)) 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); } }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8172.32%125.00%
Brian Gerst1614.29%125.00%
Mikulas Patocka1210.71%125.00%
David Howells32.68%125.00%
Total112100.00%4100.00%

/* Filesystem error... */
void hpfs_error(struct super_block *s, const char *fmt, ...) { struct va_format vaf; va_list args; va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; pr_err("filesystem error: %pV", &vaf); va_end(args); if (!hpfs_sb(s)->sb_was_error) { if (hpfs_sb(s)->sb_err == 2) { pr_cont("; crashing the system because you wanted it\n"); mark_dirty(s, 0); panic("HPFS panic"); } else if (hpfs_sb(s)->sb_err == 1) { if (sb_rdonly(s)) pr_cont("; already mounted read-only\n"); else { pr_cont("; remounting read-only\n"); mark_dirty(s, 0); s->s_flags |= SB_RDONLY; } } else if (sb_rdonly(s)) pr_cont("; going on - but anything won't be destroyed because it's read-only\n"); else pr_cont("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n"); } else pr_cont("\n"); hpfs_sb(s)->sb_was_error = 1; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11865.56%112.50%
Joe Perches2111.67%112.50%
Brian Gerst168.89%112.50%
Alexey Dobriyan73.89%112.50%
Fabian Frederick73.89%112.50%
David Howells63.33%112.50%
Mikulas Patocka42.22%112.50%
Linus Torvalds10.56%112.50%
Total180100.00%8100.00%

/* * 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; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)80100.00%1100.00%
Total80100.00%1100.00%


static void free_sbi(struct hpfs_sb_info *sbi) { kfree(sbi->sb_cp_table); kfree(sbi->sb_bmp_dir); kfree(sbi); }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro2480.00%266.67%
Linus Torvalds (pre-git)620.00%133.33%
Total30100.00%3100.00%


static void lazy_free_sbi(struct rcu_head *rcu) { free_sbi(container_of(rcu, struct hpfs_sb_info, rcu)); }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro2083.33%150.00%
Brian Gerst416.67%150.00%
Total24100.00%2100.00%


static void hpfs_put_super(struct super_block *s) { hpfs_lock(s); unmark_dirty(s); hpfs_unlock(s); call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi); }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro1743.59%125.00%
Mikulas Patocka1538.46%125.00%
Brian Gerst410.26%125.00%
Linus Torvalds (pre-git)37.69%125.00%
Total39100.00%4100.00%


static 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, 0); if (!bits) return (unsigned)-1; count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); hpfs_brelse4(&qbh); return count; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5272.22%233.33%
Akinobu Mita1318.06%233.33%
Mikulas Patocka79.72%233.33%
Total72100.00%6100.00%


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 < COUNT_RD_AHEAD; n++) { hpfs_prefetch_bitmap(s, n); } for (n = 0; n < n_bands; n++) { unsigned c; hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD); c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n])); if (c != (unsigned)-1) count += c; } return count; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6048.78%233.33%
Mikulas Patocka5544.72%350.00%
Brian Gerst86.50%116.67%
Total123100.00%6100.00%


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; }

Contributors

PersonTokensPropCommitsCommitProp
Mikulas Patocka70100.00%1100.00%
Total70100.00%1100.00%


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 == (unsigned)-1) sbi->sb_n_free = count_bitmaps(s); 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 = hpfs_get_free_dnodes(s); buf->f_fsid.val[0] = (u32)id; buf->f_fsid.val[1] = (u32)(id >> 32); buf->f_namelen = 254; hpfs_unlock(s); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7341.48%220.00%
Coly Li4425.00%110.00%
Brian Gerst2111.93%110.00%
Mikulas Patocka158.52%110.00%
David Howells116.25%110.00%
Arnd Bergmann84.55%110.00%
Paul Menage21.14%110.00%
Al Viro10.57%110.00%
Andrew Morton10.57%110.00%
Total176100.00%10100.00%


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; } } }

Contributors

PersonTokensPropCommitsCommitProp
Mikulas Patocka171100.00%1100.00%
Total171100.00%1100.00%

static struct kmem_cache * hpfs_inode_cachep;
static struct inode *hpfs_alloc_inode(struct super_block *sb) { struct hpfs_inode_info *ei; ei = kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS); if (!ei) return NULL; return &ei->vfs_inode; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds4097.56%150.00%
Christoph Lameter12.44%150.00%
Total41100.00%2100.00%


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)); }

Contributors

PersonTokensPropCommitsCommitProp
Nicholas Piggin1850.00%150.00%
Linus Torvalds1850.00%150.00%
Total36100.00%2100.00%


static void hpfs_destroy_inode(struct inode *inode) { call_rcu(&inode->i_rcu, hpfs_i_callback); }

Contributors

PersonTokensPropCommitsCommitProp
Nicholas Piggin21100.00%1100.00%
Total21100.00%1100.00%


static void init_once(void *foo) { struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo; inode_init_once(&ei->vfs_inode); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds2790.00%150.00%
Christoph Lameter310.00%150.00%
Total30100.00%2100.00%


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|SLAB_ACCOUNT), init_once); if (hpfs_inode_cachep == NULL) return -ENOMEM; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds3984.78%120.00%
Paul Jackson48.70%240.00%
Vladimir Davydov24.35%120.00%
Andrew Morton12.17%120.00%
Total46100.00%5100.00%


static void destroy_inodecache(void) { /* * Make sure all delayed rcu free inodes are flushed before we * destroy cache. */ rcu_barrier(); kmem_cache_destroy(hpfs_inode_cachep); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds1376.47%150.00%
Kirill A. Shutemov423.53%150.00%
Total17100.00%2100.00%

/* * 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, kuid_t *uid, kgid_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; /*pr_info("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 = make_kuid(current_user_ns(), option); if (!uid_valid(*uid)) return 0; break; case Opt_gid: if (match_int(args, &option)) return 0; *gid = make_kgid(current_user_ns(), option); if (!gid_valid(*gid)) return 0; 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; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)20346.35%114.29%
Andrew Morton17139.04%114.29%
Eric W. Biedermann388.68%114.29%
Dave Jones132.97%114.29%
Linus Torvalds112.51%114.29%
Fabian Frederick10.23%114.29%
Adrian Bunk10.23%114.29%
Total438100.00%7100.00%


static inline void hpfs_help(void) { pr_info("\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"); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1285.71%250.00%
Mikulas Patocka17.14%125.00%
Fabian Frederick17.14%125.00%
Total14100.00%4100.00%


static int hpfs_remount_fs(struct super_block *s, int *flags, char *data) { kuid_t uid; kgid_t gid; umode_t umask; int lowercase, eas, chk, errs, chkdsk, timeshift; int o; struct hpfs_sb_info *sbi = hpfs_sb(s); sync_filesystem(s); *flags |= SB_NOATIME; hpfs_lock(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, &timeshift))) { pr_err("bad mount options.\n"); goto out_err; } if (o == 2) { hpfs_help(); goto out_err; } if (timeshift != sbi->sb_timeshift) { pr_err("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 & SB_RDONLY)) mark_dirty(s, 1); hpfs_unlock(s); return 0; out_err: hpfs_unlock(s); return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)21068.85%17.69%
Brian Gerst4815.74%17.69%
Arnd Bergmann123.93%17.69%
Miklos Szeredi113.61%17.69%
Mikulas Patocka72.30%215.38%
Theodore Y. Ts'o51.64%17.69%
Fabian Frederick41.31%215.38%
Alessio Igor Bogani30.98%17.69%
Linus Torvalds20.66%17.69%
Eric W. Biedermann20.66%17.69%
Al Viro10.33%17.69%
Total305100.00%13100.00%


static int hpfs_show_options(struct seq_file *seq, struct dentry *root) { struct hpfs_sb_info *sbi = hpfs_sb(root->d_sb); seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, sbi->sb_uid)); seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, sbi->sb_gid)); seq_printf(seq, ",umask=%03o", (~sbi->sb_mode & 0777)); if (sbi->sb_lowercase) seq_printf(seq, ",case=lower"); if (!sbi->sb_chk) seq_printf(seq, ",check=none"); if (sbi->sb_chk == 2) seq_printf(seq, ",check=strict"); if (!sbi->sb_err) seq_printf(seq, ",errors=continue"); if (sbi->sb_err == 2) seq_printf(seq, ",errors=panic"); if (!sbi->sb_chkdsk) seq_printf(seq, ",chkdsk=no"); if (sbi->sb_chkdsk == 2) seq_printf(seq, ",chkdsk=always"); if (!sbi->sb_eas) seq_printf(seq, ",eas=no"); if (sbi->sb_eas == 1) seq_printf(seq, ",eas=ro"); if (sbi->sb_timeshift) seq_printf(seq, ",timeshift=%d", sbi->sb_timeshift); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Mikulas Patocka22197.36%133.33%
Miklos Szeredi52.20%133.33%
Linus Torvalds (pre-git)10.44%133.33%
Total227100.00%3100.00%

/* 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 = hpfs_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; kuid_t uid; kgid_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; sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) { return -ENOMEM; } s->s_fs_info = sbi; 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, &timeshift))) { pr_err("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) pr_err("Bad magic ... probably not HPFS\n"); goto bail4; } /* Check version */ if (!sb_rdonly(s) && superblock->funcversion != 2 && superblock->funcversion != 3) { pr_err("Bad version %d,%d. Mount readonly to go around\n", (int)superblock->version, (int)superblock->funcversion); 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\n"); goto bail4; } s->s_flags |= SB_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; if (sbi->sb_fs_size >= 0x80000000) { hpfs_error(s, "invalid size in superblock: %08x", (unsigned)sbi->sb_fs_size); goto bail4; } if (spareblock->n_spares_used) hpfs_load_hotfix_map(s, spareblock); /* 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) { pr_err("Improperly stopped, not mounted\n"); goto bail4; } hpfs_error(s, "improperly stopped"); } if (!sb_rdonly(s)) { spareblock->dirty = 1; spareblock->old_wrote = 0; mark_buffer_dirty(bh2); } if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) { if (errs >= 2) { pr_err("Spare dnodes used, try chkdsk\n"); mark_dirty(s, 0); goto bail4; } hpfs_error(s, "warning: spare dnodes used, try chkdsk"); if (errs == 0) pr_err("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 pr_err("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)))) pr_err("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); free_sbi(sbi); return -EINVAL; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)91670.30%26.45%
Mikulas Patocka15812.13%619.35%
Brian Gerst906.91%26.45%
Al Viro675.14%929.03%
Andi Kleen272.07%13.23%
Fabian Frederick181.38%26.45%
Linus Torvalds110.84%39.68%
David Howells100.77%26.45%
Jan Blunck20.15%13.23%
Eric W. Biedermann20.15%13.23%
Thomas Gleixner10.08%13.23%
Panagiotis Issaris10.08%13.23%
Total1303100.00%31100.00%


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); }

Contributors

PersonTokensPropCommitsCommitProp
Al Viro3487.18%250.00%
Linus Torvalds (pre-git)410.26%125.00%
Andries E. Brouwer12.56%125.00%
Total39100.00%4100.00%

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, }; MODULE_ALIAS_FS("hpfs");
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; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds3570.00%133.33%
Linus Torvalds (pre-git)1530.00%266.67%
Total50100.00%3100.00%


static void __exit exit_hpfs_fs(void) { unregister_filesystem(&hpfs_fs_type); destroy_inodecache(); }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)1583.33%266.67%
Linus Torvalds316.67%133.33%
Total18100.00%3100.00%

module_init(init_hpfs_fs) module_exit(exit_hpfs_fs) MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)194347.86%67.32%
Mikulas Patocka75218.52%1214.63%
Andrew Morton3468.52%33.66%
Al Viro2255.54%1315.85%
Brian Gerst2115.20%22.44%
Linus Torvalds2045.02%44.88%
Eric W. Biedermann471.16%22.44%
Coly Li441.08%11.22%
Nicholas Piggin390.96%11.22%
David Howells330.81%33.66%
Fabian Frederick310.76%33.66%
Andi Kleen270.67%11.22%
Joe Perches210.52%11.22%
Miklos Szeredi200.49%11.22%
Arnd Bergmann200.49%11.22%
Dave Jones190.47%33.66%
Akinobu Mita140.34%22.44%
Alexey Dobriyan100.25%22.44%
Art Haas100.25%11.22%
Christoph Lameter60.15%33.66%
Alessio Igor Bogani50.12%11.22%
Theodore Y. Ts'o50.12%11.22%
Paul Jackson40.10%22.44%
Kirill A. Shutemov40.10%11.22%
Jeff Garzik30.07%11.22%
Tejun Heo30.07%11.22%
Paul Menage20.05%11.22%
Vladimir Davydov20.05%11.22%
Christoph Hellwig20.05%11.22%
Jan Blunck20.05%11.22%
Panagiotis Issaris10.02%11.22%
Andries E. Brouwer10.02%11.22%
Thomas Gleixner10.02%11.22%
Josef 'Jeff' Sipek10.02%11.22%
Steven Whitehouse10.02%11.22%
Adrian Bunk10.02%11.22%
Jeff Layton0.00%00.00%
Total4060100.00%82100.00%
Directory: fs/hpfs
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.