/*
* hfs_lookup()
*/
static struct dentry *hfs_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
hfs_cat_rec rec;
struct hfs_find_data fd;
struct inode *inode = NULL;
int res;
hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd);
hfs_cat_build_key(dir->i_sb, fd.search_key, dir->i_ino, &dentry->d_name);
res = hfs_brec_read(&fd, &rec, sizeof(rec));
if (res) {
hfs_find_exit(&fd);
if (res == -ENOENT) {
/* No such entry */
inode = NULL;
goto done;
}
return ERR_PTR(res);
}
inode = hfs_iget(dir->i_sb, &fd.search_key->cat, &rec);
hfs_find_exit(&fd);
if (!inode)
return ERR_PTR(-EACCES);
done:
d_add(dentry, inode);
return NULL;
}
/*
* hfs_rename()
*
* This is the rename() entry in the inode_operations structure for
* regular HFS directories. The purpose is to rename an existing
* file or directory, given the inode for the current directory and
* the name (and its length) of the existing file/directory and the
* inode for the new directory and the name (and its length) of the
* new file/directory.
* XXX: how do you handle must_be dir?
*/
static int hfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry,
unsigned int flags)
{
int res;
if (flags & ~RENAME_NOREPLACE)
return -EINVAL;
/* Unlink destination if it already exists */
if (d_really_is_positive(new_dentry)) {
res = hfs_remove(new_dir, new_dentry);
if (res)
return res;
}
res = hfs_cat_move(d_inode(old_dentry)->i_ino,
old_dir, &old_dentry->d_name,
new_dir, &new_dentry->d_name);
if (!res)
hfs_cat_build_key(old_dir->i_sb,
(btree_key *)&HFS_I(d_inode(old_dentry))->cat_key,
new_dir->i_ino, &new_dentry->d_name);
return res;
}
/*
* build_key()
*
* Build a key for a file by the given name in the given directory.
* If the name matches one of the reserved names returns 1 otherwise 0.
*/
static int build_key(struct hfs_cat_key *key, struct inode *dir,
const char *name, int len)
{
struct hfs_name cname;
const struct hfs_name *reserved;
/* mangle the name */
hfs_nameout(dir, &cname, name, len);
/* check against reserved names */
reserved = HFS_SB(dir->i_sb)->s_reserved1;
while (reserved->Len) {
if (hfs_streq(reserved, &cname)) {
return 1;
}
++reserved;
}
/* check against the names reserved only in the root directory */
if (HFS_I(dir)->entry->cnid == htonl(HFS_ROOT_CNID)) {
reserved = HFS_SB(dir->i_sb)->s_reserved2;
while (reserved->Len) {
if (hfs_streq(reserved, &cname)) {
return 1;
}
++reserved;
}
}
/* build the key */
hfs_cat_build_key(HFS_I(dir)->entry->cnid, &cname, key);
return 0;
}
/*
* nat_hdr_unlink()
*
* This is the unlink() entry in the inode_operations structure for
* Netatalk .AppleDouble directories. The purpose is to delete an
* existing file, given the inode for the parent directory and the name
* (and its length) of the existing file.
*
* WE DON'T ACTUALLY DELETE HEADER THE FILE.
* In non-afpd-compatible mode:
* We return -EPERM.
* In afpd-compatible mode:
* We return success if the file exists or is .Parent.
* Otherwise we return -ENOENT.
*/
static int nat_hdr_unlink(struct inode *dir, const char *name, int len)
{
struct hfs_cat_entry *entry = HFS_I(dir)->entry;
int error = 0;
if (!HFS_SB(dir->i_sb)->s_afpd) {
/* Not in AFPD compatibility mode */
error = -EPERM;
} else {
struct hfs_name cname;
hfs_nameout(dir, &cname, name, len);
if (!hfs_streq(&cname, DOT_PARENT)) {
struct hfs_cat_entry *victim;
struct hfs_cat_key key;
hfs_cat_build_key(entry->cnid, &cname, &key);
victim = hfs_cat_get(entry->mdb, &key);
if (victim) {
/* pretend to succeed */
hfs_cat_put(victim);
} else {
error = -ENOENT;
}
}
}
iput(dir);
return error;
}
/*
* cap_lookup()
*
* This is the lookup() entry in the inode_operations structure for
* HFS directories in the CAP scheme. The purpose is to generate the
* inode corresponding to an entry in a directory, given the inode for
* the directory and the name (and its length) of the entry.
*/
static struct dentry *cap_lookup(struct inode * dir, struct dentry *dentry)
{
ino_t dtype;
struct hfs_name cname;
struct hfs_cat_entry *entry;
struct hfs_cat_key key;
struct inode *inode = NULL;
dentry->d_op = &hfs_dentry_operations;
entry = HFS_I(dir)->entry;
dtype = HFS_ITYPE(dir->i_ino);
/* Perform name-mangling */
hfs_nameout(dir, &cname, dentry->d_name.name,
dentry->d_name.len);
/* no need to check for "." or ".." */
/* Check for special directories if in a normal directory.
Note that cap_dupdir() does an iput(dir). */
if (dtype==HFS_CAP_NDIR) {
/* Check for ".resource", ".finderinfo" and ".rootinfo" */
if (hfs_streq(cname.Name, cname.Len,
DOT_RESOURCE->Name, DOT_RESOURCE_LEN)) {
++entry->count; /* __hfs_iget() eats one */
inode = hfs_iget(entry, HFS_CAP_RDIR, dentry);
goto done;
} else if (hfs_streq(cname.Name, cname.Len,
DOT_FINDERINFO->Name,
DOT_FINDERINFO_LEN)) {
++entry->count; /* __hfs_iget() eats one */
inode = hfs_iget(entry, HFS_CAP_FDIR, dentry);
goto done;
} else if ((entry->cnid == htonl(HFS_ROOT_CNID)) &&
hfs_streq(cname.Name, cname.Len,
DOT_ROOTINFO->Name, DOT_ROOTINFO_LEN)) {
++entry->count; /* __hfs_iget() eats one */
inode = hfs_iget(entry, HFS_CAP_FNDR, dentry);
goto done;
}
}
/* Do an hfs_iget() on the mangled name. */
hfs_cat_build_key(entry->cnid, &cname, &key);
inode = hfs_iget(hfs_cat_get(entry->mdb, &key),
HFS_I(dir)->file_type, dentry);
/* Don't return a resource fork for a directory */
if (inode && (dtype == HFS_CAP_RDIR) &&
(HFS_I(inode)->entry->type == HFS_CDR_DIR)) {
iput(inode); /* this does an hfs_cat_put */
inode = NULL;
}
done:
d_add(dentry, inode);
return NULL;
}
/*
* hfs_rename()
*
* This is the rename() entry in the inode_operations structure for
* regular HFS directories. The purpose is to rename an existing
* file or directory, given the inode for the current directory and
* the name (and its length) of the existing file/directory and the
* inode for the new directory and the name (and its length) of the
* new file/directory.
* XXX: how do you handle must_be dir?
*/
int hfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
int res;
/* Unlink destination if it already exists */
if (new_dentry->d_inode) {
res = hfs_unlink(new_dir, new_dentry);
if (res)
return res;
}
res = hfs_cat_move(old_dentry->d_inode->i_ino,
old_dir, &old_dentry->d_name,
new_dir, &new_dentry->d_name);
if (!res)
hfs_cat_build_key((btree_key *)&HFS_I(old_dentry->d_inode)->cat_key,
new_dir->i_ino, &new_dentry->d_name);
return res;
}
static int hfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
int res;
if (new_dentry->d_inode) {
res = hfs_remove(new_dir, new_dentry);
if (res)
return res;
}
res = hfs_cat_move(old_dentry->d_inode->i_ino,
old_dir, &old_dentry->d_name,
new_dir, &new_dentry->d_name);
if (!res)
hfs_cat_build_key(old_dir->i_sb,
(btree_key *)&HFS_I(old_dentry->d_inode)->cat_key,
new_dir->i_ino, &new_dentry->d_name);
return res;
}
/*
* nat_hdr_rename()
*
* This is the rename() entry in the inode_operations structure for
* Netatalk header directories. The purpose is to rename an existing
* file given the inode for the current directory and the name
* (and its length) of the existing file and the inode for the new
* directory and the name (and its length) of the new file/directory.
*
* WE NEVER MOVE ANYTHING.
* In non-afpd-compatible mode:
* We return -EPERM.
* In afpd-compatible mode:
* If the source header doesn't exist, we return -ENOENT.
* If the destination is not a header directory we return -EPERM.
* We return success if the destination is also a header directory
* and the header exists or is ".Parent".
*/
static int nat_hdr_rename(struct inode *old_dir, const char *old_name,
int old_len, struct inode *new_dir,
const char *new_name, int new_len, int must_be_dir)
{
struct hfs_cat_entry *entry = HFS_I(old_dir)->entry;
int error = 0;
if (!HFS_SB(old_dir->i_sb)->s_afpd) {
/* Not in AFPD compatibility mode */
error = -EPERM;
} else {
struct hfs_name cname;
hfs_nameout(old_dir, &cname, old_name, old_len);
if (!hfs_streq(&cname, DOT_PARENT)) {
struct hfs_cat_entry *victim;
struct hfs_cat_key key;
hfs_cat_build_key(entry->cnid, &cname, &key);
victim = hfs_cat_get(entry->mdb, &key);
if (victim) {
/* pretend to succeed */
hfs_cat_put(victim);
} else {
error = -ENOENT;
}
}
if (!error && (HFS_ITYPE(new_dir->i_ino) != HFS_NAT_HDIR)) {
error = -EPERM;
}
}
iput(old_dir);
iput(new_dir);
return error;
}
/*
* hfs_lookup()
*/
static struct dentry *hfs_lookup(struct inode *dir, struct dentry *dentry,
unsigned int flags)
{
hfs_cat_rec rec;
struct hfs_find_data fd;
struct inode *inode = NULL;
int res;
res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd);
if (res)
return ERR_PTR(res);
hfs_cat_build_key(dir->i_sb, fd.search_key, dir->i_ino, &dentry->d_name);
res = hfs_brec_read(&fd, &rec, sizeof(rec));
if (res) {
if (res != -ENOENT)
inode = ERR_PTR(res);
} else {
inode = hfs_iget(dir->i_sb, &fd.search_key->cat, &rec);
if (!inode)
inode = ERR_PTR(-EACCES);
}
hfs_find_exit(&fd);
return d_splice_alias(inode, dentry);
}
/*
* hfs_readdir
*/
static int hfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
{
struct inode *inode = filp->f_path.dentry->d_inode;
struct super_block *sb = inode->i_sb;
int len, err;
char strbuf[HFS_MAX_NAMELEN];
union hfs_cat_rec entry;
struct hfs_find_data fd;
struct hfs_readdir_data *rd;
u16 type;
if (filp->f_pos >= inode->i_size)
return 0;
hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
hfs_cat_build_key(sb, fd.search_key, inode->i_ino, NULL);
err = hfs_brec_find(&fd);
if (err)
goto out;
switch ((u32)filp->f_pos) {
case 0:
/* This is completely artificial... */
if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR))
goto out;
filp->f_pos++;
/* fall through */
case 1:
if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) {
err = -EIO;
goto out;
}
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength);
if (entry.type != HFS_CDR_THD) {
printk(KERN_ERR "hfs: bad catalog folder thread\n");
err = -EIO;
goto out;
}
//if (fd.entrylength < HFS_MIN_THREAD_SZ) {
// printk(KERN_ERR "hfs: truncated catalog thread\n");
// err = -EIO;
// goto out;
//}
if (filldir(dirent, "..", 2, 1,
be32_to_cpu(entry.thread.ParID), DT_DIR))
goto out;
filp->f_pos++;
/* fall through */
default:
if (filp->f_pos >= inode->i_size)
goto out;
err = hfs_brec_goto(&fd, filp->f_pos - 1);
if (err)
goto out;
}
for (;;) {
if (be32_to_cpu(fd.key->cat.ParID) != inode->i_ino) {
printk(KERN_ERR "hfs: walked past end of dir\n");
err = -EIO;
goto out;
}
if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) {
err = -EIO;
goto out;
}
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength);
type = entry.type;
len = hfs_mac2asc(sb, strbuf, &fd.key->cat.CName);
if (type == HFS_CDR_DIR) {
if (fd.entrylength < sizeof(struct hfs_cat_dir)) {
printk(KERN_ERR "hfs: small dir entry\n");
err = -EIO;
goto out;
}
if (filldir(dirent, strbuf, len, filp->f_pos,
be32_to_cpu(entry.dir.DirID), DT_DIR))
break;
} else if (type == HFS_CDR_FIL) {
if (fd.entrylength < sizeof(struct hfs_cat_file)) {
printk(KERN_ERR "hfs: small file entry\n");
err = -EIO;
goto out;
}
if (filldir(dirent, strbuf, len, filp->f_pos,
be32_to_cpu(entry.file.FlNum), DT_REG))
break;
} else {
printk(KERN_ERR "hfs: bad catalog entry type %d\n", type);
err = -EIO;
goto out;
}
filp->f_pos++;
if (filp->f_pos >= inode->i_size)
goto out;
err = hfs_brec_goto(&fd, 1);
if (err)
goto out;
}
rd = filp->private_data;
if (!rd) {
rd = kmalloc(sizeof(struct hfs_readdir_data), GFP_KERNEL);
if (!rd) {
err = -ENOMEM;
goto out;
}
filp->private_data = rd;
rd->file = filp;
list_add(&rd->list, &HFS_I(inode)->open_dir_list);
}
memcpy(&rd->key, &fd.key, sizeof(struct hfs_cat_key));
out:
hfs_find_exit(&fd);
return err;
}
/*
* hfs_read_super()
*
* This is the function that is responsible for mounting an HFS
* filesystem. It performs all the tasks necessary to get enough data
* from the disk to read the root inode. This includes parsing the
* mount options, dealing with Macintosh partitions, reading the
* superblock and the allocation bitmap blocks, calling
* hfs_btree_init() to get the necessary data about the extents and
* catalog B-trees and, finally, reading the root inode into memory.
*/
struct super_block *hfs_read_super(struct super_block *s, void *data,
int silent)
{
struct hfs_mdb *mdb;
struct hfs_cat_key key;
kdev_t dev = s->s_dev;
hfs_s32 part_size, part_start;
struct inode *root_inode;
int part;
if (!parse_options((char *)data, HFS_SB(s), &part)) {
hfs_warn("hfs_fs: unable to parse mount options.\n");
goto bail3;
}
/* set the device driver to 512-byte blocks */
set_blocksize(dev, HFS_SECTOR_SIZE);
s->s_blocksize_bits = HFS_SECTOR_SIZE_BITS;
s->s_blocksize = HFS_SECTOR_SIZE;
#ifdef CONFIG_MAC_PARTITION
/* check to see if we're in a partition */
mdb = hfs_mdb_get(s, s->s_flags & MS_RDONLY, 0);
/* erk. try parsing the partition table ourselves */
if (!mdb) {
if (hfs_part_find(s, part, silent, &part_size, &part_start)) {
goto bail2;
}
mdb = hfs_mdb_get(s, s->s_flags & MS_RDONLY, part_start);
}
#else
if (hfs_part_find(s, part, silent, &part_size, &part_start)) {
goto bail2;
}
mdb = hfs_mdb_get(s, s->s_flags & MS_RDONLY, part_start);
#endif
if (!mdb) {
if (!silent) {
hfs_warn("VFS: Can't find a HFS filesystem on dev %s.\n",
kdevname(dev));
}
goto bail2;
}
HFS_SB(s)->s_mdb = mdb;
if (HFS_ITYPE(mdb->next_id) != 0) {
hfs_warn("hfs_fs: too many files.\n");
goto bail1;
}
s->s_magic = HFS_SUPER_MAGIC;
s->s_op = &hfs_super_operations;
/* try to get the root inode */
hfs_cat_build_key(htonl(HFS_POR_CNID),
(struct hfs_name *)(mdb->vname), &key);
root_inode = hfs_iget(hfs_cat_get(mdb, &key), HFS_ITYPE_NORM, NULL);
if (!root_inode)
goto bail_no_root;
s->s_root = d_alloc_root(root_inode);
if (!s->s_root)
goto bail_no_root;
/* fix up pointers. */
HFS_I(root_inode)->entry->sys_entry[HFS_ITYPE_TO_INT(HFS_ITYPE_NORM)] =
s->s_root;
s->s_root->d_op = &hfs_dentry_operations;
/* everything's okay */
return s;
bail_no_root:
hfs_warn("hfs_fs: get root inode failed.\n");
iput(root_inode);
bail1:
hfs_mdb_put(mdb, s->s_flags & MS_RDONLY);
bail2:
set_blocksize(dev, BLOCK_SIZE);
bail3:
return NULL;
}
/*
* hfs_readdir
*/
static int hfs_readdir(struct file *file, struct dir_context *ctx)
{
struct inode *inode = file_inode(file);
struct super_block *sb = inode->i_sb;
int len, err;
char strbuf[HFS_MAX_NAMELEN];
union hfs_cat_rec entry;
struct hfs_find_data fd;
struct hfs_readdir_data *rd;
u16 type;
if (ctx->pos >= inode->i_size)
return 0;
err = hfs_find_init(HFS_SB(sb)->cat_tree, &fd);
if (err)
return err;
hfs_cat_build_key(sb, fd.search_key, inode->i_ino, NULL);
err = hfs_brec_find(&fd);
if (err)
goto out;
if (ctx->pos == 0) {
/* This is completely artificial... */
if (!dir_emit_dot(file, ctx))
goto out;
ctx->pos = 1;
}
if (ctx->pos == 1) {
if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) {
err = -EIO;
goto out;
}
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength);
if (entry.type != HFS_CDR_THD) {
pr_err("bad catalog folder thread\n");
err = -EIO;
goto out;
}
//if (fd.entrylength < HFS_MIN_THREAD_SZ) {
// pr_err("truncated catalog thread\n");
// err = -EIO;
// goto out;
//}
if (!dir_emit(ctx, "..", 2,
be32_to_cpu(entry.thread.ParID), DT_DIR))
goto out;
ctx->pos = 2;
}
if (ctx->pos >= inode->i_size)
goto out;
err = hfs_brec_goto(&fd, ctx->pos - 1);
if (err)
goto out;
for (;;) {
if (be32_to_cpu(fd.key->cat.ParID) != inode->i_ino) {
pr_err("walked past end of dir\n");
err = -EIO;
goto out;
}
if (fd.entrylength > sizeof(entry) || fd.entrylength < 0) {
err = -EIO;
goto out;
}
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength);
type = entry.type;
len = hfs_mac2asc(sb, strbuf, &fd.key->cat.CName);
if (type == HFS_CDR_DIR) {
if (fd.entrylength < sizeof(struct hfs_cat_dir)) {
pr_err("small dir entry\n");
err = -EIO;
goto out;
}
if (!dir_emit(ctx, strbuf, len,
be32_to_cpu(entry.dir.DirID), DT_DIR))
break;
} else if (type == HFS_CDR_FIL) {
if (fd.entrylength < sizeof(struct hfs_cat_file)) {
pr_err("small file entry\n");
err = -EIO;
goto out;
}
if (!dir_emit(ctx, strbuf, len,
be32_to_cpu(entry.file.FlNum), DT_REG))
break;
} else {
pr_err("bad catalog entry type %d\n", type);
err = -EIO;
goto out;
}
ctx->pos++;
if (ctx->pos >= inode->i_size)
goto out;
err = hfs_brec_goto(&fd, 1);
if (err)
goto out;
}
rd = file->private_data;
if (!rd) {
rd = kmalloc(sizeof(struct hfs_readdir_data), GFP_KERNEL);
if (!rd) {
err = -ENOMEM;
goto out;
}
file->private_data = rd;
rd->file = file;
spin_lock(&HFS_I(inode)->open_dir_lock);
list_add(&rd->list, &HFS_I(inode)->open_dir_list);
spin_unlock(&HFS_I(inode)->open_dir_lock);
}
/*
* Can be done after the list insertion; exclusion with
* hfs_delete_cat() is provided by directory lock.
*/
memcpy(&rd->key, &fd.key->cat, sizeof(struct hfs_cat_key));
out:
hfs_find_exit(&fd);
return err;
}
/*
* nat_lookup()
*
* This is the lookup() entry in the inode_operations structure for
* HFS directories in the Netatalk scheme. The purpose is to generate
* the inode corresponding to an entry in a directory, given the inode
* for the directory and the name (and its length) of the entry.
*/
static int nat_lookup(struct inode * dir, const char * name,
int len, struct inode ** result)
{
ino_t dtype;
struct hfs_name cname;
struct hfs_cat_entry *entry;
struct hfs_cat_key key;
struct inode *inode = NULL;
if (!dir || !S_ISDIR(dir->i_mode)) {
goto done;
}
entry = HFS_I(dir)->entry;
dtype = HFS_ITYPE(dir->i_ino);
if (len && !name) {
*result = NULL;
iput(dir);
return -EINVAL;
}
/* Perform name-mangling */
hfs_nameout(dir, &cname, name, len);
/* Check for "." */
if (hfs_streq(&cname, DOT)) {
/* this little trick skips the iget and iput */
*result = dir;
return 0;
}
/* Check for "..". */
if (hfs_streq(&cname, DOT_DOT)) {
struct hfs_cat_entry *parent;
if (dtype != HFS_NAT_NDIR) {
/* Case for ".." in ".AppleDouble" */
parent = entry;
++entry->count; /* __hfs_iget() eats one */
} else {
/* Case for ".." in a normal directory */
parent = hfs_cat_parent(entry);
}
inode = __hfs_iget(parent, HFS_NAT_NDIR, 0);
goto done;
}
/* Check for ".AppleDouble" if in a normal directory,
and for ".Parent" in ".AppleDouble". */
if (dtype==HFS_NAT_NDIR) {
/* Check for ".AppleDouble" */
if (hfs_streq(&cname, DOT_APPLEDOUBLE)) {
++entry->count; /* __hfs_iget() eats one */
inode = __hfs_iget(entry, HFS_NAT_HDIR, 1);
goto done;
}
} else if (dtype==HFS_NAT_HDIR) {
if (hfs_streq(&cname, DOT_PARENT)) {
++entry->count; /* __hfs_iget() eats one */
inode = __hfs_iget(entry, HFS_NAT_HDR, 0);
goto done;
}
}
/* Do an hfs_iget() on the mangled name. */
hfs_cat_build_key(entry->cnid, &cname, &key);
inode = hfs_iget(entry->mdb, &key, HFS_I(dir)->file_type);
/* Don't return a header file for a directory other than .Parent */
if (inode && (dtype == HFS_NAT_HDIR) &&
(HFS_I(inode)->entry != entry) &&
(HFS_I(inode)->entry->type == HFS_CDR_DIR)) {
iput(inode);
inode = NULL;
}
done:
iput(dir);
*result = inode;
return inode ? 0 : -ENOENT;
}
