static int hfsplus_rename(struct inode *old_dir, struct dentry *old_dentry,
struct inode *new_dir, struct dentry *new_dentry)
{
int res;
hfsplus_handle_t hfsplus_handle;
/* Unlink destination if it already exists */
if (new_dentry->d_inode) {
res = hfsplus_unlink(new_dir, new_dentry);
if (res)
return res;
}
if ((res = hfsplus_journal_start(__FUNCTION__, old_dir->i_sb, &hfsplus_handle)))
return res;
res = hfsplus_rename_cat(&hfsplus_handle, (u32)(unsigned long)old_dentry->d_fsdata,
old_dir, &old_dentry->d_name,
new_dir, &new_dentry->d_name);
if (!res)
new_dentry->d_fsdata = old_dentry->d_fsdata;
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
static int hfsplus_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
struct inode *inode;
hfsplus_handle_t hfsplus_handle;
int res;
if ((res = hfsplus_journal_start(__FUNCTION__, dir->i_sb, &hfsplus_handle)))
return res;
inode = hfsplus_new_inode(&hfsplus_handle, dir->i_sb, S_IFDIR | mode);
if (!inode) {
hfsplus_journal_stop(&hfsplus_handle);
return -ENOSPC;
}
res = hfsplus_create_cat(&hfsplus_handle, inode->i_ino, dir, &dentry->d_name, inode);
if (res) {
inode->i_nlink = 0;
hfsplus_delete_inode(&hfsplus_handle, inode);
iput(inode);
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
hfsplus_instantiate(dentry, inode, inode->i_ino);
res = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
static int hfsplus_mknod(struct inode *dir, struct dentry *dentry,
int mode, dev_t rdev)
{
struct super_block *sb;
struct inode *inode;
hfsplus_handle_t hfsplus_handle;
int res;
if ((res = hfsplus_journal_start(__FUNCTION__, dir->i_sb, &hfsplus_handle)))
return res;
sb = dir->i_sb;
inode = hfsplus_new_inode(&hfsplus_handle, sb, mode);
if (!inode) {
hfsplus_journal_stop(&hfsplus_handle);
return -ENOSPC;
}
res = hfsplus_create_cat(&hfsplus_handle, inode->i_ino, dir, &dentry->d_name, inode);
if (res) {
inode->i_nlink = 0;
hfsplus_delete_inode(&hfsplus_handle, inode);
iput(inode);
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
init_special_inode(inode, mode, rdev);
hfsplus_instantiate(dentry, inode, inode->i_ino);
res = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
hfsplus_journal_stop(&hfsplus_handle);
return 0;
}
static int hfsplus_unlink(struct inode *dir, struct dentry *dentry)
{
struct super_block *sb = dir->i_sb;
struct inode *inode = dentry->d_inode;
struct qstr str;
char name[32];
u32 cnid;
int res;
hfsplus_handle_t hfsplus_handle;
if (HFSPLUS_IS_RSRC(inode))
return -EPERM;
if ((res = hfsplus_journal_start(__FUNCTION__, dir->i_sb, &hfsplus_handle)))
return res;
cnid = (u32)(unsigned long)dentry->d_fsdata;
if (inode->i_ino == cnid &&
atomic_read(&HFSPLUS_I(inode).opencnt)) {
str.name = name;
str.len = sprintf(name, "temp%lu", inode->i_ino);
res = hfsplus_rename_cat(&hfsplus_handle, inode->i_ino,
dir, &dentry->d_name,
HFSPLUS_SB(sb).hidden_dir, &str);
if (!res)
inode->i_flags |= S_DEAD;
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
res = hfsplus_delete_cat(&hfsplus_handle, cnid, dir, &dentry->d_name);
if (res) {
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
if (inode->i_nlink > 0)
drop_nlink(inode);
if (inode->i_ino == cnid)
clear_nlink(inode);
if (!inode->i_nlink) {
if (inode->i_ino != cnid) {
HFSPLUS_SB(sb).file_count--;
if (!atomic_read(&HFSPLUS_I(inode).opencnt)) {
res = hfsplus_delete_cat(&hfsplus_handle, inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
if (!res)
hfsplus_delete_inode(&hfsplus_handle, inode);
} else
inode->i_flags |= S_DEAD;
} else
hfsplus_delete_inode(&hfsplus_handle,inode);
} else
HFSPLUS_SB(sb).file_count--;
inode->i_ctime = CURRENT_TIME_SEC;
res = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
static int hfsplus_symlink(struct inode *dir, struct dentry *dentry,
const char *symname)
{
struct super_block *sb;
struct inode *inode;
hfsplus_handle_t hfsplus_handle;
int res;
if ((res = hfsplus_journal_start(__FUNCTION__, dir->i_sb, &hfsplus_handle)))
return res;
sb = dir->i_sb;
inode = hfsplus_new_inode(&hfsplus_handle, sb, S_IFLNK | S_IRWXUGO);
if (!inode) {
hfsplus_journal_stop(&hfsplus_handle);
return -ENOSPC;
}
res = page_symlink(inode, symname, strlen(symname) + 1);
if (res) {
inode->i_nlink = 0;
hfsplus_delete_inode(&hfsplus_handle, inode);
iput(inode);
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
if ((res = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode)))
goto symlink_out;
res = hfsplus_create_cat(&hfsplus_handle, inode->i_ino, dir, &dentry->d_name, inode);
if (!res) {
hfsplus_instantiate(dentry, inode, inode->i_ino);
res = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
}
symlink_out:
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
void hfsplus_file_truncate(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
struct hfs_find_data fd;
u32 alloc_cnt, blk_cnt, start;
int res;
hfsplus_handle_t hfsplus_handle;
dprint(DBG_INODE, "truncate: %lu, %Lu -> %Lu\n", inode->i_ino,
(long long)HFSPLUS_I(inode).phys_size, inode->i_size);
if (inode->i_size > HFSPLUS_I(inode).phys_size) {
struct address_space *mapping = inode->i_mapping;
struct page *page;
void *fsdata;
u32 size = inode->i_size - 1;
int res;
page = grab_cache_page(mapping, size >> PAGE_CACHE_SHIFT);
if (!page)
return;
size &= PAGE_CACHE_SIZE - 1;
size++;
res = mapping->a_ops->write_begin(NULL, mapping, size, 0,
AOP_FLAG_UNINTERRUPTIBLE,
&page, &fsdata);
if (!res)
res = mapping->a_ops->write_end(NULL, mapping, size, 0, 0, page, fsdata);
if (res)
inode->i_size = HFSPLUS_I(inode).phys_size;
unlock_page(page);
page_cache_release(page);
if (hfsplus_journal_start(__FUNCTION__, sb, &hfsplus_handle))
return;
hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
hfsplus_journal_stop(&hfsplus_handle);
return;
} else if (inode->i_size == HFSPLUS_I(inode).phys_size)
static int hfsplus_rmdir(struct inode *dir, struct dentry *dentry)
{
struct inode *inode;
hfsplus_handle_t hfsplus_handle;
int res;
inode = dentry->d_inode;
if (inode->i_size != 2)
return -ENOTEMPTY;
if ((res = hfsplus_journal_start(__FUNCTION__, dir->i_sb, &hfsplus_handle)))
return res;
res = hfsplus_delete_cat(&hfsplus_handle, inode->i_ino, dir, &dentry->d_name);
if (res) {
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
clear_nlink(inode);
inode->i_ctime = CURRENT_TIME_SEC;
hfsplus_delete_inode(&hfsplus_handle, inode);
res = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir,
struct dentry *dst_dentry)
{
struct super_block *sb = dst_dir->i_sb;
struct inode *inode = src_dentry->d_inode;
struct inode *src_dir = src_dentry->d_parent->d_inode;
hfsplus_handle_t hfsplus_handle;
struct qstr str;
char name[32];
u32 cnid, id;
int res;
if (HFSPLUS_IS_RSRC(inode))
return -EPERM;
if ((res = hfsplus_journal_start(__FUNCTION__, dst_dir->i_sb, &hfsplus_handle)))
return res;
if (inode->i_ino == (u32)(unsigned long)src_dentry->d_fsdata) {
for (;;) {
get_random_bytes(&id, sizeof(cnid));
id &= 0x3fffffff;
str.name = name;
str.len = sprintf(name, "iNode%d", id);
res = hfsplus_rename_cat(&hfsplus_handle, inode->i_ino,
src_dir, &src_dentry->d_name,
HFSPLUS_SB(sb).hidden_dir, &str);
if (!res)
break;
if (res != -EEXIST) {
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
}
HFSPLUS_I(inode).dev = id;
cnid = HFSPLUS_SB(sb).next_cnid++;
src_dentry->d_fsdata = (void *)(unsigned long)cnid;
res = hfsplus_create_cat(&hfsplus_handle, cnid, src_dir, &src_dentry->d_name, inode);
if (res) {
/* panic? */
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
HFSPLUS_SB(sb).file_count++;
}
cnid = HFSPLUS_SB(sb).next_cnid++;
res = hfsplus_create_cat(&hfsplus_handle, cnid, dst_dir, &dst_dentry->d_name, inode);
if (res) {
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
inc_nlink(inode);
hfsplus_instantiate(dst_dentry, inode, cnid);
atomic_inc(&inode->i_count);
inode->i_ctime = CURRENT_TIME_SEC;
res = hfsplus_journalled_mark_inode_dirty(__FUNCTION__, &hfsplus_handle, inode);
HFSPLUS_SB(sb).file_count++;
sb->s_dirt = 1;
hfsplus_journal_stop(&hfsplus_handle);
return res;
}
/* Find the entry inside dir named dentry->d_name */
static struct dentry *hfsplus_lookup(struct inode *dir, struct dentry *dentry,
struct nameidata *nd)
{
struct inode *inode = NULL;
struct hfs_find_data fd;
struct super_block *sb;
hfsplus_handle_t hfsplus_handle;
hfsplus_cat_entry entry;
int err;
u32 cnid, linkid = 0;
u16 type;
if (hfsplus_journal_start(__FUNCTION__, dir->i_sb, &hfsplus_handle))
return NULL;
sb = dir->i_sb;
dentry->d_op = &hfsplus_dentry_operations;
dentry->d_fsdata = NULL;
hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, &dentry->d_name);
again:
err = hfs_brec_read(&hfsplus_handle, &fd, &entry, sizeof(entry));
if (err) {
if (err == -ENOENT) {
hfs_find_exit(&hfsplus_handle, &fd);
/* No such entry */
inode = NULL;
goto out;
}
goto fail;
}
type = be16_to_cpu(entry.type);
if (type == HFSPLUS_FOLDER) {
if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
err = -EIO;
goto fail;
}
cnid = be32_to_cpu(entry.folder.id);
dentry->d_fsdata = (void *)(unsigned long)cnid;
} else if (type == HFSPLUS_FILE) {
if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
err = -EIO;
goto fail;
}
cnid = be32_to_cpu(entry.file.id);
if (entry.file.user_info.fdType == cpu_to_be32(HFSP_HARDLINK_TYPE) &&
entry.file.user_info.fdCreator == cpu_to_be32(HFSP_HFSPLUS_CREATOR) &&
(entry.file.create_date == HFSPLUS_I(HFSPLUS_SB(sb).hidden_dir).create_date ||
entry.file.create_date == HFSPLUS_I(sb->s_root->d_inode).create_date) &&
HFSPLUS_SB(sb).hidden_dir) {
struct qstr str;
char name[32];
if (dentry->d_fsdata) {
/*
* We found a link pointing to another link,
* so ignore it and treat it as regular file.
*/
cnid = (unsigned long)dentry->d_fsdata;
linkid = 0;
} else {
dentry->d_fsdata = (void *)(unsigned long)cnid;
linkid = be32_to_cpu(entry.file.permissions.dev);
str.len = sprintf(name, "iNode%d", linkid);
str.name = name;
hfsplus_cat_build_key(sb, fd.search_key, HFSPLUS_SB(sb).hidden_dir->i_ino, &str);
goto again;
}
} else if (!dentry->d_fsdata)
dentry->d_fsdata = (void *)(unsigned long)cnid;
} else {
printk(KERN_ERR "hfs: invalid catalog entry type in lookup\n");
err = -EIO;
goto fail;
}
hfs_find_exit(&hfsplus_handle, &fd);
inode = hfsplus_iget(dir->i_sb, cnid);
if (!inode)
return ERR_PTR(-EACCES);
if (S_ISREG(inode->i_mode))
HFSPLUS_I(inode).dev = linkid;
out:
d_add(dentry, inode);
hfsplus_journal_stop(&hfsplus_handle);
return NULL;
fail:
hfs_find_exit(&hfsplus_handle, &fd);
hfsplus_journal_stop(&hfsplus_handle);
return ERR_PTR(err);
}
static int hfsplus_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[HFSPLUS_MAX_STRLEN + 1];
hfsplus_cat_entry entry;
struct hfs_find_data fd;
struct hfsplus_readdir_data *rd;
hfsplus_handle_t hfsplus_handle;
u16 type;
if (filp->f_pos >= inode->i_size)
return 0;
if ((err = hfsplus_journal_start(__FUNCTION__, sb, &hfsplus_handle)))
return err;
hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
hfsplus_cat_build_key(sb, fd.search_key, inode->i_ino, NULL);
err = hfs_brec_find(&hfsplus_handle, &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:
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength);
if (be16_to_cpu(entry.type) != HFSPLUS_FOLDER_THREAD) {
printk(KERN_ERR "hfs: bad catalog folder thread\n");
err = -EIO;
goto out;
}
if (fd.entrylength < HFSPLUS_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.parentID), DT_DIR))
goto out;
filp->f_pos++;
/* fall through */
default:
if (filp->f_pos >= inode->i_size)
goto out;
err = hfs_brec_goto(&hfsplus_handle, &fd, filp->f_pos - 1);
if (err)
goto out;
}
for (;;) {
if (be32_to_cpu(fd.key->cat.parent) != inode->i_ino) {
printk(KERN_ERR "hfs: walked past end of dir\n");
err = -EIO;
goto out;
}
hfs_bnode_read(fd.bnode, &entry, fd.entryoffset, fd.entrylength);
type = be16_to_cpu(entry.type);
len = HFSPLUS_MAX_STRLEN;
err = hfsplus_uni2asc(sb, &fd.key->cat.name, strbuf, &len);
if (err)
goto out;
if (type == HFSPLUS_FOLDER) {
if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
printk(KERN_ERR "hfs: small dir entry\n");
err = -EIO;
goto out;
}
if (HFSPLUS_SB(sb).hidden_dir &&
HFSPLUS_SB(sb).hidden_dir->i_ino == be32_to_cpu(entry.folder.id))
goto next;
if (filldir(dirent, strbuf, len, filp->f_pos,
be32_to_cpu(entry.folder.id), DT_DIR))
break;
} else if (type == HFSPLUS_FILE) {
if (fd.entrylength < sizeof(struct hfsplus_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.id), DT_REG))
break;
} else {
printk(KERN_ERR "hfs: bad catalog entry type\n");
err = -EIO;
goto out;
}
next:
filp->f_pos++;
if (filp->f_pos >= inode->i_size)
goto out;
err = hfs_brec_goto(&hfsplus_handle, &fd, 1);
if (err)
goto out;
}
rd = filp->private_data;
if (!rd) {
rd = kmalloc(sizeof(struct hfsplus_readdir_data), GFP_KERNEL);
if (!rd) {
err = -ENOMEM;
goto out;
}
filp->private_data = rd;
rd->file = filp;
list_add(&rd->list, &HFSPLUS_I(inode).open_dir_list);
}
memcpy(&rd->key, fd.key, sizeof(struct hfsplus_cat_key));
out:
hfs_find_exit(&hfsplus_handle, &fd);
hfsplus_journal_stop(&hfsplus_handle);
return err;
}
