struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry)
{
const char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
struct quad_buffer_head qbh;
struct hpfs_dirent *de;
ino_t ino;
int err;
struct inode *result = NULL;
if ((err = hpfs_chk_name((char *)name, &len))) {
if (err == -ENAMETOOLONG) return ERR_PTR(-ENAMETOOLONG);
goto end_add;
}
hpfs_lock_inode(dir);
/*
* '.' and '..' will never be passed here.
*/
de = map_dirent(dir, dir->i_hpfs_dno, (char *) name, len, NULL, &qbh);
/*
* This is not really a bailout, just means file not found.
*/
if (!de) goto end;
/*
* Get inode number, what we're after.
*/
ino = de->fnode;
/*
* Go find or make an inode.
*/
hpfs_lock_iget(dir->i_sb, de->directory || (de->ea_size && dir->i_sb->s_hpfs_eas) ? 1 : 2);
if (!(result = iget(dir->i_sb, ino))) {
hpfs_unlock_iget(dir->i_sb);
hpfs_error(dir->i_sb, "hpfs_lookup: can't get inode");
goto bail1;
}
if (!de->directory) result->i_hpfs_parent_dir = dir->i_ino;
hpfs_unlock_iget(dir->i_sb);
hpfs_decide_conv(result, (char *)name, len);
if (de->has_acl || de->has_xtd_perm) if (!(dir->i_sb->s_flags & MS_RDONLY)) {
hpfs_error(result->i_sb, "ACLs or XPERM found. This is probably HPFS386. This driver doesn't support it now. Send me some info on these structures");
goto bail1;
}
/*
* Fill in the info from the directory if this is a newly created
* inode.
*/
if (!result->i_ctime) {
if (!(result->i_ctime = local_to_gmt(dir->i_sb, de->creation_date)))
result->i_ctime = 1;
result->i_mtime = local_to_gmt(dir->i_sb, de->write_date);
result->i_atime = local_to_gmt(dir->i_sb, de->read_date);
result->i_hpfs_ea_size = de->ea_size;
if (!result->i_hpfs_ea_mode && de->read_only)
result->i_mode &= ~0222;
if (!de->directory) {
if (result->i_size == -1) {
result->i_size = de->file_size;
result->i_data.a_ops = &hpfs_aops;
result->u.hpfs_i.mmu_private = result->i_size;
/*
* i_blocks should count the fnode and any anodes.
* We count 1 for the fnode and don't bother about
* anodes -- the disk heads are on the directory band
* and we want them to stay there.
*/
result->i_blocks = 1 + ((result->i_size + 511) >> 9);
}
}
}
struct super_block *hpfs_read_super(struct super_block *s, void *options,
int silent)
{
kdev_t dev;
struct buffer_head *bh0, *bh1, *bh2;
struct hpfs_boot_block *bootblock;
struct hpfs_super_block *superblock;
struct hpfs_spare_block *spareblock;
uid_t uid;
gid_t gid;
umode_t umask;
int lowercase, conv, eas, chk, errs, chkdsk, timeshift;
dnode_secno root_dno;
struct hpfs_dirent *de = NULL;
struct quad_buffer_head qbh;
int o;
s->s_hpfs_bmp_dir = NULL;
s->s_hpfs_cp_table = NULL;
s->s_hpfs_creation_de_lock = s->s_hpfs_rd_inode = 0;
init_waitqueue_head(&s->s_hpfs_creation_de);
init_waitqueue_head(&s->s_hpfs_iget_q);
uid = current->uid;
gid = current->gid;
umask = current->fs->umask;
lowercase = 0;
conv = CONV_BINARY;
eas = 2;
chk = 1;
errs = 1;
chkdsk = 1;
timeshift = 0;
if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv,
&eas, &chk, &errs, &chkdsk, ×hift))) {
printk("HPFS: bad mount options.\n");
goto bail0;
}
if (o==2) {
hpfs_help();
goto bail0;
}
/*s->s_hpfs_mounting = 1;*/
dev = s->s_dev;
set_blocksize(dev, 512);
s->s_hpfs_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 (/*bootblock->magic != BB_MAGIC
||*/ superblock->magic != SB_MAGIC
|| 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 - [email protected]\n");
goto bail4;
}
s->s_flags |= MS_NOATIME;
/* Fill superblock stuff */
s->s_magic = HPFS_SUPER_MAGIC;
s->s_blocksize = 512;
s->s_blocksize_bits = 9;
s->s_op = &hpfs_sops;
s->s_hpfs_root = superblock->root;
s->s_hpfs_fs_size = superblock->n_sectors;
s->s_hpfs_bitmaps = superblock->bitmaps;
s->s_hpfs_dirband_start = superblock->dir_band_start;
s->s_hpfs_dirband_size = superblock->n_dir_band;
s->s_hpfs_dmap = superblock->dir_band_bitmap;
s->s_hpfs_uid = uid;
s->s_hpfs_gid = gid;
s->s_hpfs_mode = 0777 & ~umask;
s->s_hpfs_n_free = -1;
s->s_hpfs_n_free_dnodes = -1;
s->s_hpfs_lowercase = lowercase;
s->s_hpfs_conv = conv;
s->s_hpfs_eas = eas;
s->s_hpfs_chk = chk;
s->s_hpfs_chkdsk = chkdsk;
s->s_hpfs_err = errs;
s->s_hpfs_timeshift = timeshift;
s->s_hpfs_was_error = 0;
s->s_hpfs_cp_table = NULL;
s->s_hpfs_c_bitmap = -1;
/* Load bitmap directory */
if (!(s->s_hpfs_bmp_dir = hpfs_load_bitmap_directory(s, 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 || spareblock->n_spares_used) {
if (errs >= 2) {
printk("HPFS: Hotfixes not supported here, try chkdsk\n");
mark_dirty(s);
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 (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) {
if (errs >= 2) {
printk("HPFS: Spare dnodes used, try chkdsk\n");
mark_dirty(s);
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 (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band ||
superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) {
hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band);
goto bail4;
}
a = s->s_hpfs_dirband_size;
s->s_hpfs_dirband_size = 0;
if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") ||
hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") ||
hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) {
mark_dirty(s);
goto bail4;
}
s->s_hpfs_dirband_size = a;
} else printk("HPFS: You really don't want any checks? You are crazy...\n");
/* Load code page table */
if (spareblock->n_code_pages)
if (!(s->s_hpfs_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir)))
printk("HPFS: Warning: code page support is disabled\n");
brelse(bh2);
brelse(bh1);
brelse(bh0);
hpfs_lock_iget(s, 1);
s->s_root = d_alloc_root(iget(s, s->s_hpfs_root));
hpfs_unlock_iget(s);
if (!s->s_root || !s->s_root->d_inode) {
printk("HPFS: iget failed. Why???\n");
goto bail0;
}
hpfs_set_dentry_operations(s->s_root);
/*
* find the root directory's . pointer & finish filling in the inode
*/
root_dno = hpfs_fnode_dno(s, s->s_hpfs_root);
if (root_dno)
de = map_dirent(s->s_root->d_inode, root_dno, "\001\001", 2, NULL, &qbh);
if (!root_dno || !de) hpfs_error(s, "unable to find root dir");
else {
s->s_root->d_inode->i_atime = local_to_gmt(s, de->read_date);
s->s_root->d_inode->i_mtime = local_to_gmt(s, de->write_date);
s->s_root->d_inode->i_ctime = local_to_gmt(s, de->creation_date);
s->s_root->d_inode->i_hpfs_ea_size = de->ea_size;
s->s_root->d_inode->i_hpfs_parent_dir = s->s_root->d_inode->i_ino;
if (s->s_root->d_inode->i_size == -1) s->s_root->d_inode->i_size = 2048;
if (s->s_root->d_inode->i_blocks == -1) s->s_root->d_inode->i_blocks = 5;
}
if (de) hpfs_brelse4(&qbh);
return s;
bail4: brelse(bh2);
bail3: brelse(bh1);
bail2: brelse(bh0);
bail1:
bail0:
if (s->s_hpfs_bmp_dir) kfree(s->s_hpfs_bmp_dir);
if (s->s_hpfs_cp_table) kfree(s->s_hpfs_cp_table);
return NULL;
}
