static int hpfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
{
const unsigned char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
struct buffer_head *bh;
struct fnode *fnode;
fnode_secno fno;
int r;
struct hpfs_dirent dee;
struct inode *result = NULL;
int err;
if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
if (!new_valid_dev(rdev))
return -EINVAL;
hpfs_lock(dir->i_sb);
err = -ENOSPC;
fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
if (!fnode)
goto bail;
memset(&dee, 0, sizeof dee);
if (!(mode & 0222)) dee.read_only = 1;
dee.archive = 1;
dee.hidden = name[0] == '.';
dee.fnode = cpu_to_le32(fno);
dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
result = new_inode(dir->i_sb);
if (!result)
goto bail1;
hpfs_init_inode(result);
result->i_ino = fno;
hpfs_i(result)->i_parent_dir = dir->i_ino;
result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
result->i_ctime.tv_nsec = 0;
result->i_mtime.tv_nsec = 0;
result->i_atime.tv_nsec = 0;
hpfs_i(result)->i_ea_size = 0;
result->i_uid = current_fsuid();
result->i_gid = current_fsgid();
set_nlink(result, 1);
result->i_size = 0;
result->i_blocks = 1;
init_special_inode(result, mode, rdev);
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail2;
if (r == -1) {
err = -EEXIST;
goto bail2;
}
fnode->len = len;
memcpy(fnode->name, name, len > 15 ? 15 : len);
fnode->up = cpu_to_le32(dir->i_ino);
mark_buffer_dirty(bh);
insert_inode_hash(result);
hpfs_write_inode_nolock(result);
hpfs_update_directory_times(dir);
d_instantiate(dentry, result);
brelse(bh);
hpfs_unlock(dir->i_sb);
return 0;
bail2:
iput(result);
bail1:
brelse(bh);
hpfs_free_sectors(dir->i_sb, fno, 1);
bail:
hpfs_unlock(dir->i_sb);
return err;
}
static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
{
const unsigned char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
struct buffer_head *bh;
struct fnode *fnode;
fnode_secno fno;
int r;
struct hpfs_dirent dee;
struct inode *result;
int err;
if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
hpfs_lock(dir->i_sb);
if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
hpfs_unlock(dir->i_sb);
return -EPERM;
}
err = -ENOSPC;
fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
if (!fnode)
goto bail;
memset(&dee, 0, sizeof dee);
dee.archive = 1;
dee.hidden = name[0] == '.';
dee.fnode = cpu_to_le32(fno);
dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
result = new_inode(dir->i_sb);
if (!result)
goto bail1;
result->i_ino = fno;
hpfs_init_inode(result);
hpfs_i(result)->i_parent_dir = dir->i_ino;
result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
result->i_ctime.tv_nsec = 0;
result->i_mtime.tv_nsec = 0;
result->i_atime.tv_nsec = 0;
hpfs_i(result)->i_ea_size = 0;
result->i_mode = S_IFLNK | 0777;
result->i_uid = current_fsuid();
result->i_gid = current_fsgid();
result->i_blocks = 1;
set_nlink(result, 1);
result->i_size = strlen(symlink);
result->i_op = &page_symlink_inode_operations;
result->i_data.a_ops = &hpfs_symlink_aops;
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail2;
if (r == -1) {
err = -EEXIST;
goto bail2;
}
fnode->len = len;
memcpy(fnode->name, name, len > 15 ? 15 : len);
fnode->up = cpu_to_le32(dir->i_ino);
hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
mark_buffer_dirty(bh);
brelse(bh);
insert_inode_hash(result);
hpfs_write_inode_nolock(result);
hpfs_update_directory_times(dir);
d_instantiate(dentry, result);
hpfs_unlock(dir->i_sb);
return 0;
bail2:
iput(result);
bail1:
brelse(bh);
hpfs_free_sectors(dir->i_sb, fno, 1);
bail:
hpfs_unlock(dir->i_sb);
return err;
}
static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
{
const unsigned char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
struct inode *result = NULL;
struct buffer_head *bh;
struct fnode *fnode;
fnode_secno fno;
int r;
struct hpfs_dirent dee;
int err;
if ((err = hpfs_chk_name(name, &len)))
return err==-ENOENT ? -EINVAL : err;
hpfs_lock(dir->i_sb);
err = -ENOSPC;
fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
if (!fnode)
goto bail;
memset(&dee, 0, sizeof dee);
if (!(mode & 0222)) dee.read_only = 1;
dee.archive = 1;
dee.hidden = name[0] == '.';
dee.fnode = cpu_to_le32(fno);
dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
result = new_inode(dir->i_sb);
if (!result)
goto bail1;
hpfs_init_inode(result);
result->i_ino = fno;
result->i_mode |= S_IFREG;
result->i_mode &= ~0111;
result->i_op = &hpfs_file_iops;
result->i_fop = &hpfs_file_ops;
set_nlink(result, 1);
hpfs_i(result)->i_parent_dir = dir->i_ino;
result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
result->i_ctime.tv_nsec = 0;
result->i_mtime.tv_nsec = 0;
result->i_atime.tv_nsec = 0;
hpfs_i(result)->i_ea_size = 0;
if (dee.read_only)
result->i_mode &= ~0222;
result->i_blocks = 1;
result->i_size = 0;
result->i_data.a_ops = &hpfs_aops;
hpfs_i(result)->mmu_private = 0;
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail2;
if (r == -1) {
err = -EEXIST;
goto bail2;
}
fnode->len = len;
memcpy(fnode->name, name, len > 15 ? 15 : len);
fnode->up = cpu_to_le32(dir->i_ino);
mark_buffer_dirty(bh);
brelse(bh);
insert_inode_hash(result);
if (!uid_eq(result->i_uid, current_fsuid()) ||
!gid_eq(result->i_gid, current_fsgid()) ||
result->i_mode != (mode | S_IFREG)) {
result->i_uid = current_fsuid();
result->i_gid = current_fsgid();
result->i_mode = mode | S_IFREG;
hpfs_write_inode_nolock(result);
}
hpfs_update_directory_times(dir);
d_instantiate(dentry, result);
hpfs_unlock(dir->i_sb);
return 0;
bail2:
iput(result);
bail1:
brelse(bh);
hpfs_free_sectors(dir->i_sb, fno, 1);
bail:
hpfs_unlock(dir->i_sb);
return err;
}
static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
const unsigned char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
struct quad_buffer_head qbh0;
struct buffer_head *bh;
struct hpfs_dirent *de;
struct fnode *fnode;
struct dnode *dnode;
struct inode *result;
fnode_secno fno;
dnode_secno dno;
int r;
struct hpfs_dirent dee;
int err;
if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
hpfs_lock(dir->i_sb);
err = -ENOSPC;
fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
if (!fnode)
goto bail;
dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0);
if (!dnode)
goto bail1;
memset(&dee, 0, sizeof dee);
dee.directory = 1;
if (!(mode & 0222)) dee.read_only = 1;
/*dee.archive = 0;*/
dee.hidden = name[0] == '.';
dee.fnode = cpu_to_le32(fno);
dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
result = new_inode(dir->i_sb);
if (!result)
goto bail2;
hpfs_init_inode(result);
result->i_ino = fno;
hpfs_i(result)->i_parent_dir = dir->i_ino;
hpfs_i(result)->i_dno = dno;
result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
result->i_ctime.tv_nsec = 0;
result->i_mtime.tv_nsec = 0;
result->i_atime.tv_nsec = 0;
hpfs_i(result)->i_ea_size = 0;
result->i_mode |= S_IFDIR;
result->i_op = &hpfs_dir_iops;
result->i_fop = &hpfs_dir_ops;
result->i_blocks = 4;
result->i_size = 2048;
set_nlink(result, 2);
if (dee.read_only)
result->i_mode &= ~0222;
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail3;
if (r == -1) {
err = -EEXIST;
goto bail3;
}
fnode->len = len;
memcpy(fnode->name, name, len > 15 ? 15 : len);
fnode->up = cpu_to_le32(dir->i_ino);
fnode->flags |= FNODE_dir;
fnode->btree.n_free_nodes = 7;
fnode->btree.n_used_nodes = 1;
fnode->btree.first_free = cpu_to_le16(0x14);
fnode->u.external[0].disk_secno = cpu_to_le32(dno);
fnode->u.external[0].file_secno = cpu_to_le32(-1);
dnode->root_dnode = 1;
dnode->up = cpu_to_le32(fno);
de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);
de->creation_date = de->write_date = de->read_date = cpu_to_le32(gmt_to_local(dir->i_sb, get_seconds()));
if (!(mode & 0222)) de->read_only = 1;
de->first = de->directory = 1;
/*de->hidden = de->system = 0;*/
de->fnode = cpu_to_le32(fno);
mark_buffer_dirty(bh);
brelse(bh);
hpfs_mark_4buffers_dirty(&qbh0);
hpfs_brelse4(&qbh0);
inc_nlink(dir);
insert_inode_hash(result);
if (!uid_eq(result->i_uid, current_fsuid()) ||
!gid_eq(result->i_gid, current_fsgid()) ||
result->i_mode != (mode | S_IFDIR)) {
result->i_uid = current_fsuid();
result->i_gid = current_fsgid();
result->i_mode = mode | S_IFDIR;
hpfs_write_inode_nolock(result);
}
hpfs_update_directory_times(dir);
d_instantiate(dentry, result);
hpfs_unlock(dir->i_sb);
return 0;
bail3:
iput(result);
bail2:
hpfs_brelse4(&qbh0);
hpfs_free_dnode(dir->i_sb, dno);
bail1:
brelse(bh);
hpfs_free_sectors(dir->i_sb, fno, 1);
bail:
hpfs_unlock(dir->i_sb);
return err;
}
static int hpfs_lookup(struct inode *dir, const char *name, int len,
struct inode **result)
{
struct quad_buffer_head qbh;
struct hpfs_dirent *de;
struct inode *inode;
ino_t ino;
/* In case of madness */
*result = 0;
if (dir == 0)
return -ENOENT;
if (!S_ISDIR(dir->i_mode))
goto bail;
/*
* Read in the directory entry. "." is there under the name ^A^A .
* Always read the dir even for . and .. in case we need the dates.
*/
if (name[0] == '.' && len == 1)
de = map_dirent(dir, dir->i_hpfs_dno, "\001\001", 2, &qbh);
else if (name[0] == '.' && name[1] == '.' && len == 2)
de = map_dirent(dir,
fnode_dno(dir->i_dev, dir->i_hpfs_parent_dir),
"\001\001", 2, &qbh);
else
de = map_dirent(dir, dir->i_hpfs_dno, name, len, &qbh);
/*
* This is not really a bailout, just means file not found.
*/
if (!de)
goto bail;
/*
* Get inode number, what we're after.
*/
if (de->directory)
ino = dir_ino(de->fnode);
else
ino = file_ino(de->fnode);
/*
* Go find or make an inode.
*/
if (!(inode = iget(dir->i_sb, ino)))
goto bail1;
/*
* Fill in the info from the directory if this is a newly created
* inode.
*/
if (!inode->i_atime) {
inode->i_atime = local_to_gmt(de->read_date);
inode->i_mtime = local_to_gmt(de->write_date);
inode->i_ctime = local_to_gmt(de->creation_date);
if (de->read_only)
inode->i_mode &= ~0222;
if (!de->directory) {
inode->i_size = de->file_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.
*/
inode->i_blocks = 1 + ((inode->i_size + 511) >> 9);
}
struct super_block *hpfs_read_super(struct super_block *s,
void *options, int silent)
{
struct hpfs_boot_block *bootblock;
struct hpfs_super_block *superblock;
struct hpfs_spare_block *spareblock;
struct hpfs_dirent *de;
struct buffer_head *bh0, *bh1, *bh2;
struct quad_buffer_head qbh;
dnode_secno root_dno;
dev_t dev;
uid_t uid;
gid_t gid;
umode_t umask;
int lowercase;
int conv;
int dubious;
/*
* Get the mount options
*/
if (!parse_opts(options, &uid, &gid, &umask, &lowercase, &conv)) {
printk("HPFS: syntax error in mount options. Not mounted.\n");
s->s_dev = 0;
return 0;
}
/*
* Fill in the super block struct
*/
lock_super(s);
dev = s->s_dev;
set_blocksize(dev, 512);
/*
* fetch sectors 0, 16, 17
*/
bootblock = map_sector(dev, 0, &bh0);
if (!bootblock)
goto bail;
superblock = map_sector(dev, 16, &bh1);
if (!superblock)
goto bail0;
spareblock = map_sector(dev, 17, &bh2);
if (!spareblock)
goto bail1;
/*
* Check that this fs looks enough like a known one that we can find
* and read the root directory.
*/
if (bootblock->magic != 0xaa55
|| superblock->magic != SB_MAGIC
|| spareblock->magic != SP_MAGIC
|| bootblock->sig_28h != 0x28
|| memcmp(&bootblock->sig_hpfs, "HPFS ", 8)
|| little_ushort(bootblock->bytes_per_sector) != 512) {
printk("HPFS: hpfs_read_super: Not HPFS\n");
goto bail2;
}
/*
* Check for inconsistencies -- possibly wrong guesses here, possibly
* filesystem problems.
*/
dubious = 0;
dubious |= check_warn(spareblock->dirty != 0,
"`Improperly stopped'", "flag is set", "run CHKDSK");
dubious |= check_warn(spareblock->n_spares_used != 0,
"Spare blocks", "may be in use", "run CHKDSK");
/*
* Above errors mean we could get wrong answers if we proceed,
* so don't
*/
if (dubious)
goto bail2;
dubious |= check_warn((spareblock->n_dnode_spares !=
spareblock->n_dnode_spares_free),
"Spare dnodes", "may be in use", "run CHKDSK");
dubious |= check_warn(superblock->zero1 != 0,
"#1", "unknown word nonzero", "investigate");
dubious |= check_warn(superblock->zero3 != 0,
"#3", "unknown word nonzero", "investigate");
dubious |= check_warn(superblock->zero4 != 0,
"#4", "unknown word nonzero", "investigate");
dubious |= check_warn(!zerop(superblock->zero5,
sizeof superblock->zero5),
"#5", "unknown word nonzero", "investigate");
dubious |= check_warn(!zerop(superblock->zero6,
sizeof superblock->zero6),
"#6", "unknown word nonzero", "investigate");
if (dubious)
printk("HPFS: Proceeding, but operation may be unreliable\n");
/*
* set fs read only
*/
s->s_flags |= MS_RDONLY;
/*
* fill in standard stuff
*/
s->s_magic = HPFS_SUPER_MAGIC;
s->s_blocksize = 512;
s->s_blocksize_bits = 9;
s->s_op = (struct super_operations *) &hpfs_sops;
/*
* fill in hpfs stuff
*/
s->s_hpfs_root = dir_ino(superblock->root);
s->s_hpfs_fs_size = superblock->n_sectors;
s->s_hpfs_dirband_size = superblock->n_dir_band / 4;
s->s_hpfs_dmap = superblock->dir_band_bitmap;
s->s_hpfs_bitmaps = superblock->bitmaps;
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;
/*
* done with the low blocks
*/
brelse(bh2);
brelse(bh1);
brelse(bh0);
/*
* all set. try it out.
*/
s->s_mounted = iget(s, s->s_hpfs_root);
unlock_super(s);
if (!s->s_mounted) {
printk("HPFS: hpfs_read_super: inode get failed\n");
s->s_dev = 0;
return 0;
}
/*
* find the root directory's . pointer & finish filling in the inode
*/
root_dno = fnode_dno(dev, s->s_hpfs_root);
if (root_dno)
de = map_dirent(s->s_mounted, root_dno, "\001\001", 2, &qbh);
if (!root_dno || !de) {
printk("HPFS: "
"hpfs_read_super: root dir isn't in the root dir\n");
s->s_dev = 0;
return 0;
}
s->s_mounted->i_atime = local_to_gmt(de->read_date);
s->s_mounted->i_mtime = local_to_gmt(de->write_date);
s->s_mounted->i_ctime = local_to_gmt(de->creation_date);
brelse4(&qbh);
return s;
bail2:
brelse(bh2);
bail1:
brelse(bh1);
bail0:
brelse(bh0);
bail:
s->s_dev = 0;
unlock_super(s);
return 0;
}
struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
const unsigned 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;
struct hpfs_inode_info *hpfs_result;
hpfs_lock(dir->i_sb);
if ((err = hpfs_chk_name(name, &len))) {
if (err == -ENAMETOOLONG) {
hpfs_unlock(dir->i_sb);
return ERR_PTR(-ENAMETOOLONG);
}
goto end_add;
}
/*
* '.' and '..' will never be passed here.
*/
de = map_dirent(dir, hpfs_i(dir)->i_dno, 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 = le32_to_cpu(de->fnode);
/*
* Go find or make an inode.
*/
result = iget_locked(dir->i_sb, ino);
if (!result) {
hpfs_error(dir->i_sb, "hpfs_lookup: can't get inode");
goto bail1;
}
if (result->i_state & I_NEW) {
hpfs_init_inode(result);
if (de->directory)
hpfs_read_inode(result);
else if (le32_to_cpu(de->ea_size) && hpfs_sb(dir->i_sb)->sb_eas)
hpfs_read_inode(result);
else {
result->i_mode |= S_IFREG;
result->i_mode &= ~0111;
result->i_op = &hpfs_file_iops;
result->i_fop = &hpfs_file_ops;
result->i_nlink = 1;
}
unlock_new_inode(result);
}
hpfs_result = hpfs_i(result);
if (!de->directory) hpfs_result->i_parent_dir = dir->i_ino;
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.tv_sec) {
if (!(result->i_ctime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->creation_date))))
result->i_ctime.tv_sec = 1;
result->i_ctime.tv_nsec = 0;
result->i_mtime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->write_date));
result->i_mtime.tv_nsec = 0;
result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->read_date));
result->i_atime.tv_nsec = 0;
hpfs_result->i_ea_size = le32_to_cpu(de->ea_size);
if (!hpfs_result->i_ea_mode && de->read_only)
result->i_mode &= ~0222;
if (!de->directory) {
if (result->i_size == -1) {
result->i_size = le32_to_cpu(de->file_size);
result->i_data.a_ops = &hpfs_aops;
hpfs_i(result)->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);
}
}
}
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 - [email protected]\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;
if (sbi->sb_fs_size >= 0x80000000) {
hpfs_error(s, "invalid size in superblock: %08x",
(unsigned)sbi->sb_fs_size);
goto bail4;
}
/* 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 (le32_to_cpu(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_alloc_root(root);
if (!s->s_root) {
iput(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 = le16_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 int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struct nameidata *nd)
{
const char *name = dentry->d_name.name;
unsigned len = dentry->d_name.len;
struct inode *result = NULL;
struct buffer_head *bh;
struct fnode *fnode;
fnode_secno fno;
int r;
struct hpfs_dirent dee;
int err;
if ((err = hpfs_chk_name((char *)name, &len)))
return err==-ENOENT ? -EINVAL : err;
lock_kernel();
err = -ENOSPC;
fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
if (!fnode)
goto bail;
memset(&dee, 0, sizeof dee);
if (!(mode & 0222)) dee.read_only = 1;
dee.archive = 1;
dee.hidden = name[0] == '.';
dee.fnode = fno;
dee.creation_date = dee.write_date = dee.read_date = gmt_to_local(dir->i_sb, get_seconds());
result = new_inode(dir->i_sb);
if (!result)
goto bail1;
hpfs_init_inode(result);
result->i_ino = fno;
result->i_mode |= S_IFREG;
result->i_mode &= ~0111;
result->i_op = &hpfs_file_iops;
result->i_fop = &hpfs_file_ops;
result->i_nlink = 1;
hpfs_decide_conv(result, (char *)name, len);
hpfs_i(result)->i_parent_dir = dir->i_ino;
result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, dee.creation_date);
result->i_ctime.tv_nsec = 0;
result->i_mtime.tv_nsec = 0;
result->i_atime.tv_nsec = 0;
hpfs_i(result)->i_ea_size = 0;
if (dee.read_only)
result->i_mode &= ~0222;
result->i_blocks = 1;
result->i_size = 0;
result->i_data.a_ops = &hpfs_aops;
hpfs_i(result)->mmu_private = 0;
mutex_lock(&hpfs_i(dir)->i_mutex);
r = hpfs_add_dirent(dir, (char *)name, len, &dee, 0);
if (r == 1)
goto bail2;
if (r == -1) {
err = -EEXIST;
goto bail2;
}
fnode->len = len;
memcpy(fnode->name, name, len > 15 ? 15 : len);
fnode->up = dir->i_ino;
mark_buffer_dirty(bh);
brelse(bh);
insert_inode_hash(result);
if (result->i_uid != current->fsuid ||
result->i_gid != current->fsgid ||
result->i_mode != (mode | S_IFREG)) {
result->i_uid = current->fsuid;
result->i_gid = current->fsgid;
result->i_mode = mode | S_IFREG;
hpfs_write_inode_nolock(result);
}
d_instantiate(dentry, result);
mutex_unlock(&hpfs_i(dir)->i_mutex);
unlock_kernel();
return 0;
bail2:
mutex_unlock(&hpfs_i(dir)->i_mutex);
iput(result);
bail1:
brelse(bh);
hpfs_free_sectors(dir->i_sb, fno, 1);
bail:
unlock_kernel();
return err;
}
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;
}