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_unlink(struct inode *dir, struct dentry *dentry)
{
struct hfsplus_sb_info *sbi = HFSPLUS_SB(dir->i_sb);
struct inode *inode = dentry->d_inode;
struct qstr str;
char name[32];
u32 cnid;
int res;
if (HFSPLUS_IS_RSRC(inode))
return -EPERM;
mutex_lock(&sbi->vh_mutex);
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(inode->i_ino,
dir, &dentry->d_name,
sbi->hidden_dir, &str);
if (!res) {
inode->i_flags |= S_DEAD;
drop_nlink(inode);
}
goto out;
}
res = hfsplus_delete_cat(cnid, dir, &dentry->d_name);
if (res)
goto out;
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) {
sbi->file_count--;
if (!atomic_read(&HFSPLUS_I(inode)->opencnt)) {
res = hfsplus_delete_cat(inode->i_ino,
sbi->hidden_dir,
NULL);
if (!res)
hfsplus_delete_inode(inode);
} else
inode->i_flags |= S_DEAD;
} else
hfsplus_delete_inode(inode);
} else
sbi->file_count--;
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
out:
mutex_unlock(&sbi->vh_mutex);
return res;
}
int hfsplus_ext_write_extent(struct inode *inode)
{
int res;
mutex_lock(&HFSPLUS_I(inode)->extents_lock);
res = hfsplus_ext_write_extent_locked(inode);
mutex_unlock(&HFSPLUS_I(inode)->extents_lock);
return res;
}
static void hfsplus_evict_inode(struct inode *inode)
{
dprint(DBG_INODE, "hfsplus_evict_inode: %lu\n", inode->i_ino);
truncate_inode_pages(&inode->i_data, 0);
end_writeback(inode);
if (HFSPLUS_IS_RSRC(inode)) {
HFSPLUS_I(HFSPLUS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
iput(HFSPLUS_I(inode)->rsrc_inode);
}
}
static int hfsplus_dir_release(struct inode *inode, struct file *file)
{
struct hfsplus_readdir_data *rd = file->private_data;
if (rd) {
spin_lock(&HFSPLUS_I(inode)->open_dir_lock);
list_del(&rd->list);
spin_unlock(&HFSPLUS_I(inode)->open_dir_lock);
kfree(rd);
}
return 0;
}
static int hfsplus_ext_read_extent(struct inode *inode, u32 block)
{
struct hfs_find_data fd;
int res;
if (block >= HFSPLUS_I(inode).cached_start &&
block < HFSPLUS_I(inode).cached_start + HFSPLUS_I(inode).cached_blocks)
return 0;
hfs_find_init(HFSPLUS_SB(inode->i_sb).ext_tree, &fd);
res = __hfsplus_ext_cache_extent(&fd, inode, block);
hfs_find_exit(&fd);
return res;
}
/* Get a block at iblock for inode, possibly allocating if create */
int hfsplus_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
{
struct super_block *sb;
int res = -EIO;
u32 ablock, dblock, mask;
int shift;
sb = inode->i_sb;
/* Convert inode block to disk allocation block */
shift = HFSPLUS_SB(sb).alloc_blksz_shift - sb->s_blocksize_bits;
ablock = iblock >> HFSPLUS_SB(sb).fs_shift;
if (iblock >= inode->i_blocks) {
if (iblock > inode->i_blocks || !create)
return -EIO;
if (ablock >= HFSPLUS_I(inode).alloc_blocks) {
res = hfsplus_file_extend(inode);
if (res)
return res;
}
} else
create = 0;
if (ablock < HFSPLUS_I(inode).first_blocks) {
dblock = hfsplus_ext_find_block(HFSPLUS_I(inode).first_extents, ablock);
goto done;
}
down(&HFSPLUS_I(inode).extents_lock);
res = hfsplus_ext_read_extent(inode, ablock);
if (!res) {
dblock = hfsplus_ext_find_block(HFSPLUS_I(inode).cached_extents, ablock -
HFSPLUS_I(inode).cached_start);
} else {
up(&HFSPLUS_I(inode).extents_lock);
return -EIO;
}
up(&HFSPLUS_I(inode).extents_lock);
done:
dprint(DBG_EXTENT, "get_block(%lu): %llu - %u\n", inode->i_ino, (long long)iblock, dblock);
mask = (1 << HFSPLUS_SB(sb).fs_shift) - 1;
map_bh(bh_result, sb, (dblock << HFSPLUS_SB(sb).fs_shift) + HFSPLUS_SB(sb).blockoffset + (iblock & mask));
if (create) {
set_buffer_new(bh_result);
HFSPLUS_I(inode).phys_size += sb->s_blocksize;
inode->i_blocks++;
mark_inode_dirty(inode);
}
return 0;
}
static int hfsplus_ioctl_setflags(struct file *file, int __user *user_flags)
{
struct inode *inode = file_inode(file);
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
unsigned int flags, new_fl = 0;
int err = 0;
err = mnt_want_write_file(file);
if (err)
goto out;
if (!inode_owner_or_capable(inode)) {
err = -EACCES;
goto out_drop_write;
}
if (get_user(flags, user_flags)) {
err = -EFAULT;
goto out_drop_write;
}
mutex_lock(&inode->i_mutex);
if ((flags & (FS_IMMUTABLE_FL|FS_APPEND_FL)) ||
inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
if (!capable(CAP_LINUX_IMMUTABLE)) {
err = -EPERM;
goto out_unlock_inode;
}
}
/* don't silently ignore unsupported ext2 flags */
if (flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) {
err = -EOPNOTSUPP;
goto out_unlock_inode;
}
if (flags & FS_IMMUTABLE_FL)
new_fl |= S_IMMUTABLE;
if (flags & FS_APPEND_FL)
new_fl |= S_APPEND;
inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND);
if (flags & FS_NODUMP_FL)
hip->userflags |= HFSPLUS_FLG_NODUMP;
else
hip->userflags &= ~HFSPLUS_FLG_NODUMP;
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
out_unlock_inode:
mutex_unlock(&inode->i_mutex);
out_drop_write:
mnt_drop_write_file(file);
out:
return err;
}
int hfsplus_journaled_get_block(struct page *page)
{
struct inode * const inode = page->mapping->host;
struct super_block * const sb = inode->i_sb;
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
u32 ablock, res;
sector_t iblock;
s32 block_num = -1;
iblock = page->index << (PAGE_CACHE_SHIFT - inode->i_blkbits);
ablock = iblock >> HFSPLUS_SB(sb)->fs_shift;
if (ablock < hip->first_blocks) {
block_num = hfsplus_ext_find_block(hip->first_extents, ablock);
}
else {
mutex_lock(&hip->extents_lock);
res = hfsplus_ext_read_extent(inode, ablock);
if (!res) {
mutex_lock(&hip->extents_lock);
block_num = hfsplus_ext_find_block(hip->cached_extents, ablock -
hip->cached_start);
mutex_unlock(&hip->extents_lock);
} else {
mutex_unlock(&hip->extents_lock);
}
mutex_unlock(&hip->extents_lock);
}
return block_num;
}
static void hfsplus_i_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
INIT_LIST_HEAD(&inode->i_dentry);
kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
}
static inline int __hfsplus_ext_cache_extent(struct hfs_find_data *fd,
struct inode *inode, u32 block)
{
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
int res;
WARN_ON(!mutex_is_locked(&hip->extents_lock));
if (hip->extent_state & HFSPLUS_EXT_DIRTY) {
res = __hfsplus_ext_write_extent(inode, fd);
if (res)
return res;
}
res = __hfsplus_ext_read_extent(fd, hip->cached_extents, inode->i_ino,
block, HFSPLUS_IS_RSRC(inode) ?
HFSPLUS_TYPE_RSRC :
HFSPLUS_TYPE_DATA);
if (!res) {
hip->cached_start = be32_to_cpu(fd->key->ext.start_block);
hip->cached_blocks =
hfsplus_ext_block_count(hip->cached_extents);
} else {
hip->cached_start = hip->cached_blocks = 0;
hip->extent_state &= ~(HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW);
}
return res;
}
static void __hfsplus_ext_write_extent(struct inode *inode,
struct hfs_find_data *fd)
{
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
int res;
WARN_ON(!mutex_is_locked(&hip->extents_lock));
hfsplus_ext_build_key(fd->search_key, inode->i_ino, hip->cached_start,
HFSPLUS_IS_RSRC(inode) ?
HFSPLUS_TYPE_RSRC : HFSPLUS_TYPE_DATA);
res = hfs_brec_find(fd);
if (hip->extent_state & HFSPLUS_EXT_NEW) {
if (res != -ENOENT)
return;
hfs_brec_insert(fd, hip->cached_extents,
sizeof(hfsplus_extent_rec));
hip->extent_state &= ~(HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW);
} else {
if (res)
return;
hfs_bnode_write(fd->bnode, hip->cached_extents,
fd->entryoffset, fd->entrylength);
hip->extent_state &= ~HFSPLUS_EXT_DIRTY;
}
/*
* We can't just use hfsplus_mark_inode_dirty here, because we
* also get called from hfsplus_write_inode, which should not
* redirty the inode. Instead the callers have to be careful
* to explicily mark the inode dirty, too.
*/
set_bit(HFSPLUS_I_EXT_DIRTY, &hip->flags);
}
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;
if (HFSPLUS_IS_RSRC(inode))
return -EPERM;
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(inode->i_ino,
dir, &dentry->d_name,
HFSPLUS_SB(sb).hidden_dir, &str);
if (!res)
inode->i_flags |= S_DEAD;
return res;
}
res = hfsplus_delete_cat(cnid, dir, &dentry->d_name);
if (res)
return res;
if (inode->i_nlink > 0)
drop_nlink(inode);
hfsplus_delete_inode(inode);
if (inode->i_ino != cnid && !inode->i_nlink) {
if (!atomic_read(&HFSPLUS_I(inode).opencnt)) {
res = hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
if (!res)
hfsplus_delete_inode(inode);
} else
inode->i_flags |= S_DEAD;
} else
clear_nlink(inode);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
return res;
}
static int hfsplus_link(struct dentry *src_dentry, struct inode *dst_dir,
struct dentry *dst_dentry)
{
struct hfsplus_sb_info *sbi = HFSPLUS_SB(dst_dir->i_sb);
struct inode *inode = src_dentry->d_inode;
struct inode *src_dir = src_dentry->d_parent->d_inode;
struct qstr str;
char name[32];
u32 cnid, id;
int res;
if (HFSPLUS_IS_RSRC(inode))
return -EPERM;
if (!S_ISREG(inode->i_mode))
return -EPERM;
mutex_lock(&sbi->vh_mutex);
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(inode->i_ino,
src_dir, &src_dentry->d_name,
sbi->hidden_dir, &str);
if (!res)
break;
if (res != -EEXIST)
goto out;
}
HFSPLUS_I(inode)->linkid = id;
cnid = sbi->next_cnid++;
src_dentry->d_fsdata = (void *)(unsigned long)cnid;
res = hfsplus_create_cat(cnid, src_dir,
&src_dentry->d_name, inode);
if (res)
/* panic? */
goto out;
sbi->file_count++;
}
cnid = sbi->next_cnid++;
res = hfsplus_create_cat(cnid, dst_dir, &dst_dentry->d_name, inode);
if (res)
goto out;
inc_nlink(inode);
hfsplus_instantiate(dst_dentry, inode, cnid);
ihold(inode);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
sbi->file_count++;
hfsplus_mark_mdb_dirty(dst_dir->i_sb);
out:
mutex_unlock(&sbi->vh_mutex);
return res;
}
static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
*pagep = NULL;
return cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hfsplus_get_block,
&HFSPLUS_I(mapping->host).phys_size);
}
void hfsplus_ext_write_extent(struct inode *inode)
{
if (HFSPLUS_I(inode).flags & HFSPLUS_FLG_EXT_DIRTY) {
struct hfs_find_data fd;
hfs_find_init(HFSPLUS_SB(inode->i_sb).ext_tree, &fd);
__hfsplus_ext_write_extent(inode, &fd);
hfs_find_exit(&fd);
}
}
static void hfsplus_ext_write_extent_locked(struct inode *inode)
{
if (HFSPLUS_I(inode)->extent_state & HFSPLUS_EXT_DIRTY) {
struct hfs_find_data fd;
hfs_find_init(HFSPLUS_SB(inode->i_sb)->ext_tree, &fd);
__hfsplus_ext_write_extent(inode, &fd);
hfs_find_exit(&fd);
}
}
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;
struct qstr str;
char name[32];
u32 cnid, id;
int res;
if (HFSPLUS_IS_RSRC(inode))
return -EPERM;
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(inode->i_ino,
src_dir, &src_dentry->d_name,
HFSPLUS_SB(sb).hidden_dir, &str);
if (!res)
break;
if (res != -EEXIST)
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(cnid, src_dir, &src_dentry->d_name, inode);
if (res)
/* panic? */
return res;
HFSPLUS_SB(sb).file_count++;
}
cnid = HFSPLUS_SB(sb).next_cnid++;
res = hfsplus_create_cat(cnid, dst_dir, &dst_dentry->d_name, inode);
if (res)
return res;
inc_nlink(inode);
hfsplus_instantiate(dst_dentry, inode, cnid);
atomic_inc(&inode->i_count);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);
HFSPLUS_SB(sb).file_count++;
sb->s_dirt = 1;
return 0;
}
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_ext_write_extent_locked(struct inode *inode)
{
int res = 0;
if (HFSPLUS_I(inode)->extent_state & HFSPLUS_EXT_DIRTY) {
struct hfs_find_data fd;
res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->ext_tree, &fd);
if (res)
return res;
res = __hfsplus_ext_write_extent(inode, &fd);
hfs_find_exit(&fd);
}
return res;
}
static int hfsplus_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata)
{
int ret;
*pagep = NULL;
ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
hfsplus_get_block,
&HFSPLUS_I(mapping->host)->phys_size);
if (unlikely(ret))
hfsplus_write_failed(mapping, pos + len);
return ret;
}
static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
{
struct inode *inode = file->f_path.dentry->d_inode;
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
unsigned int flags = 0;
if (inode->i_flags & S_IMMUTABLE)
flags |= FS_IMMUTABLE_FL;
if (inode->i_flags & S_APPEND)
flags |= FS_APPEND_FL;
if (hip->userflags & HFSPLUS_FLG_NODUMP)
flags |= FS_NODUMP_FL;
return put_user(flags, user_flags);
}
static inline int __hfsplus_ext_cache_extent(struct hfs_find_data *fd, struct inode *inode, u32 block)
{
int res;
if (HFSPLUS_I(inode).flags & HFSPLUS_FLG_EXT_DIRTY)
__hfsplus_ext_write_extent(inode, fd);
res = __hfsplus_ext_read_extent(fd, HFSPLUS_I(inode).cached_extents, inode->i_ino,
block, HFSPLUS_IS_RSRC(inode) ? HFSPLUS_TYPE_RSRC : HFSPLUS_TYPE_DATA);
if (!res) {
HFSPLUS_I(inode).cached_start = be32_to_cpu(fd->key->ext.start_block);
HFSPLUS_I(inode).cached_blocks = hfsplus_ext_block_count(HFSPLUS_I(inode).cached_extents);
} else {
HFSPLUS_I(inode).cached_start = HFSPLUS_I(inode).cached_blocks = 0;
HFSPLUS_I(inode).flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW);
}
return res;
}
static int hfsplus_ext_read_extent(struct inode *inode, u32 block)
{
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
struct hfs_find_data fd;
int res;
if (block >= hip->cached_start &&
block < hip->cached_start + hip->cached_blocks)
return 0;
res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->ext_tree, &fd);
if (!res) {
res = __hfsplus_ext_cache_extent(&fd, inode, block);
hfs_find_exit(&fd);
}
return res;
}
static void __hfsplus_ext_write_extent(struct inode *inode, struct hfs_find_data *fd)
{
int res;
hfsplus_ext_build_key(fd->search_key, inode->i_ino, HFSPLUS_I(inode).cached_start,
HFSPLUS_IS_RSRC(inode) ? HFSPLUS_TYPE_RSRC : HFSPLUS_TYPE_DATA);
res = hfs_brec_find(fd);
if (HFSPLUS_I(inode).flags & HFSPLUS_FLG_EXT_NEW) {
if (res != -ENOENT)
return;
hfs_brec_insert(fd, HFSPLUS_I(inode).cached_extents, sizeof(hfsplus_extent_rec));
HFSPLUS_I(inode).flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW);
} else {
if (res)
return;
hfs_bnode_write(fd->bnode, HFSPLUS_I(inode).cached_extents, fd->entryoffset, fd->entrylength);
HFSPLUS_I(inode).flags &= ~HFSPLUS_FLG_EXT_DIRTY;
}
}
struct inode *hfsplus_iget(struct super_block *sb, unsigned long ino)
{
struct hfs_find_data fd;
struct inode *inode;
int err;
inode = iget_locked(sb, ino);
if (!inode)
return ERR_PTR(-ENOMEM);
if (!(inode->i_state & I_NEW))
return inode;
INIT_LIST_HEAD(&HFSPLUS_I(inode)->open_dir_list);
mutex_init(&HFSPLUS_I(inode)->extents_lock);
HFSPLUS_I(inode)->flags = 0;
HFSPLUS_I(inode)->extent_state = 0;
HFSPLUS_I(inode)->rsrc_inode = NULL;
atomic_set(&HFSPLUS_I(inode)->opencnt, 0);
if (inode->i_ino >= HFSPLUS_FIRSTUSER_CNID ||
inode->i_ino == HFSPLUS_ROOT_CNID) {
hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
err = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
if (!err)
err = hfsplus_cat_read_inode(inode, &fd);
hfs_find_exit(&fd);
} else {
err = hfsplus_system_read_inode(inode);
}
if (err) {
iget_failed(inode);
return ERR_PTR(err);
}
unlock_new_inode(inode);
return inode;
}
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;
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;
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->prepare_write(NULL, page, size, size);
if (!res)
res = mapping->a_ops->commit_write(NULL, page, size, size);
if (res)
inode->i_size = HFSPLUS_I(inode).phys_size;
unlock_page(page);
page_cache_release(page);
mark_inode_dirty(inode);
return;
}
blk_cnt = (inode->i_size + HFSPLUS_SB(sb).alloc_blksz - 1) >> HFSPLUS_SB(sb).alloc_blksz_shift;
alloc_cnt = HFSPLUS_I(inode).alloc_blocks;
if (blk_cnt == alloc_cnt)
goto out;
down(&HFSPLUS_I(inode).extents_lock);
hfs_find_init(HFSPLUS_SB(sb).ext_tree, &fd);
while (1) {
if (alloc_cnt == HFSPLUS_I(inode).first_blocks) {
hfsplus_free_extents(sb, HFSPLUS_I(inode).first_extents,
alloc_cnt, alloc_cnt - blk_cnt);
hfsplus_dump_extent(HFSPLUS_I(inode).first_extents);
HFSPLUS_I(inode).first_blocks = blk_cnt;
break;
}
res = __hfsplus_ext_cache_extent(&fd, inode, alloc_cnt);
if (res)
break;
start = HFSPLUS_I(inode).cached_start;
hfsplus_free_extents(sb, HFSPLUS_I(inode).cached_extents,
alloc_cnt - start, alloc_cnt - blk_cnt);
hfsplus_dump_extent(HFSPLUS_I(inode).cached_extents);
if (blk_cnt > start) {
HFSPLUS_I(inode).flags |= HFSPLUS_FLG_EXT_DIRTY;
break;
}
alloc_cnt = start;
HFSPLUS_I(inode).cached_start = HFSPLUS_I(inode).cached_blocks = 0;
HFSPLUS_I(inode).flags &= ~(HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW);
hfs_brec_remove(&fd);
}
hfs_find_exit(&fd);
up(&HFSPLUS_I(inode).extents_lock);
HFSPLUS_I(inode).alloc_blocks = blk_cnt;
out:
HFSPLUS_I(inode).phys_size = inode->i_size;
mark_inode_dirty(inode);
inode->i_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
}
int hfsplus_file_extend(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
u32 start, len, goal;
int res;
if (HFSPLUS_SB(sb).alloc_file->i_size * 8 < HFSPLUS_SB(sb).total_blocks - HFSPLUS_SB(sb).free_blocks + 8) {
// extend alloc file
printk("extend alloc file! (%Lu,%u,%u)\n", HFSPLUS_SB(sb).alloc_file->i_size * 8,
HFSPLUS_SB(sb).total_blocks, HFSPLUS_SB(sb).free_blocks);
return -ENOSPC;
//BUG();
}
down(&HFSPLUS_I(inode).extents_lock);
if (HFSPLUS_I(inode).alloc_blocks == HFSPLUS_I(inode).first_blocks)
goal = hfsplus_ext_lastblock(HFSPLUS_I(inode).first_extents);
else {
res = hfsplus_ext_read_extent(inode, HFSPLUS_I(inode).alloc_blocks);
if (res)
goto out;
goal = hfsplus_ext_lastblock(HFSPLUS_I(inode).cached_extents);
}
len = HFSPLUS_I(inode).clump_blocks;
start = hfsplus_block_allocate(sb, HFSPLUS_SB(sb).total_blocks, goal, &len);
if (start >= HFSPLUS_SB(sb).total_blocks) {
start = hfsplus_block_allocate(sb, goal, 0, &len);
if (start >= goal) {
res = -ENOSPC;
goto out;
}
}
dprint(DBG_EXTENT, "extend %lu: %u,%u\n", inode->i_ino, start, len);
if (HFSPLUS_I(inode).alloc_blocks <= HFSPLUS_I(inode).first_blocks) {
if (!HFSPLUS_I(inode).first_blocks) {
dprint(DBG_EXTENT, "first extents\n");
/* no extents yet */
HFSPLUS_I(inode).first_extents[0].start_block = cpu_to_be32(start);
HFSPLUS_I(inode).first_extents[0].block_count = cpu_to_be32(len);
res = 0;
} else {
/* try to append to extents in inode */
res = hfsplus_add_extent(HFSPLUS_I(inode).first_extents,
HFSPLUS_I(inode).alloc_blocks,
start, len);
if (res == -ENOSPC)
goto insert_extent;
}
if (!res) {
hfsplus_dump_extent(HFSPLUS_I(inode).first_extents);
HFSPLUS_I(inode).first_blocks += len;
}
} else {
res = hfsplus_add_extent(HFSPLUS_I(inode).cached_extents,
HFSPLUS_I(inode).alloc_blocks -
HFSPLUS_I(inode).cached_start,
start, len);
if (!res) {
hfsplus_dump_extent(HFSPLUS_I(inode).cached_extents);
HFSPLUS_I(inode).flags |= HFSPLUS_FLG_EXT_DIRTY;
HFSPLUS_I(inode).cached_blocks += len;
} else if (res == -ENOSPC)
goto insert_extent;
}
out:
up(&HFSPLUS_I(inode).extents_lock);
if (!res) {
HFSPLUS_I(inode).alloc_blocks += len;
mark_inode_dirty(inode);
}
return res;
insert_extent:
dprint(DBG_EXTENT, "insert new extent\n");
hfsplus_ext_write_extent(inode);
memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
HFSPLUS_I(inode).cached_extents[0].start_block = cpu_to_be32(start);
HFSPLUS_I(inode).cached_extents[0].block_count = cpu_to_be32(len);
hfsplus_dump_extent(HFSPLUS_I(inode).cached_extents);
HFSPLUS_I(inode).flags |= HFSPLUS_FLG_EXT_DIRTY | HFSPLUS_FLG_EXT_NEW;
HFSPLUS_I(inode).cached_start = HFSPLUS_I(inode).alloc_blocks;
HFSPLUS_I(inode).cached_blocks = len;
res = 0;
goto out;
}
int hfsplus_file_extend(struct inode *inode, bool zeroout)
{
struct super_block *sb = inode->i_sb;
struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
u32 start, len, goal;
int res;
if (sbi->alloc_file->i_size * 8 <
sbi->total_blocks - sbi->free_blocks + 8) {
/* extend alloc file */
pr_err("extend alloc file! (%llu,%u,%u)\n",
sbi->alloc_file->i_size * 8,
sbi->total_blocks, sbi->free_blocks);
return -ENOSPC;
}
mutex_lock(&hip->extents_lock);
if (hip->alloc_blocks == hip->first_blocks)
goal = hfsplus_ext_lastblock(hip->first_extents);
else {
res = hfsplus_ext_read_extent(inode, hip->alloc_blocks);
if (res)
goto out;
goal = hfsplus_ext_lastblock(hip->cached_extents);
}
len = hip->clump_blocks;
start = hfsplus_block_allocate(sb, sbi->total_blocks, goal, &len);
if (start >= sbi->total_blocks) {
start = hfsplus_block_allocate(sb, goal, 0, &len);
if (start >= goal) {
res = -ENOSPC;
goto out;
}
}
if (zeroout) {
res = sb_issue_zeroout(sb, start, len, GFP_NOFS);
if (res)
goto out;
}
hfs_dbg(EXTENT, "extend %lu: %u,%u\n", inode->i_ino, start, len);
if (hip->alloc_blocks <= hip->first_blocks) {
if (!hip->first_blocks) {
hfs_dbg(EXTENT, "first extents\n");
/* no extents yet */
hip->first_extents[0].start_block = cpu_to_be32(start);
hip->first_extents[0].block_count = cpu_to_be32(len);
res = 0;
} else {
/* try to append to extents in inode */
res = hfsplus_add_extent(hip->first_extents,
hip->alloc_blocks,
start, len);
if (res == -ENOSPC)
goto insert_extent;
}
if (!res) {
hfsplus_dump_extent(hip->first_extents);
hip->first_blocks += len;
}
} else {
res = hfsplus_add_extent(hip->cached_extents,
hip->alloc_blocks - hip->cached_start,
start, len);
if (!res) {
hfsplus_dump_extent(hip->cached_extents);
hip->extent_state |= HFSPLUS_EXT_DIRTY;
hip->cached_blocks += len;
} else if (res == -ENOSPC)
goto insert_extent;
}
out:
if (!res) {
hip->alloc_blocks += len;
mutex_unlock(&hip->extents_lock);
hfsplus_mark_inode_dirty(inode, HFSPLUS_I_ALLOC_DIRTY);
return 0;
}
mutex_unlock(&hip->extents_lock);
return res;
insert_extent:
hfs_dbg(EXTENT, "insert new extent\n");
res = hfsplus_ext_write_extent_locked(inode);
if (res)
goto out;
memset(hip->cached_extents, 0, sizeof(hfsplus_extent_rec));
hip->cached_extents[0].start_block = cpu_to_be32(start);
hip->cached_extents[0].block_count = cpu_to_be32(len);
hfsplus_dump_extent(hip->cached_extents);
hip->extent_state |= HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW;
hip->cached_start = hip->alloc_blocks;
hip->cached_blocks = len;
res = 0;
goto out;
}
void hfsplus_file_truncate(struct inode *inode)
{
struct super_block *sb = inode->i_sb;
struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
struct hfs_find_data fd;
u32 alloc_cnt, blk_cnt, start;
int res;
hfs_dbg(INODE, "truncate: %lu, %llu -> %llu\n",
inode->i_ino, (long long)hip->phys_size, inode->i_size);
if (inode->i_size > hip->phys_size) {
struct address_space *mapping = inode->i_mapping;
struct page *page;
void *fsdata;
loff_t size = inode->i_size;
res = pagecache_write_begin(NULL, mapping, size, 0,
AOP_FLAG_UNINTERRUPTIBLE,
&page, &fsdata);
if (res)
return;
res = pagecache_write_end(NULL, mapping, size,
0, 0, page, fsdata);
if (res < 0)
return;
mark_inode_dirty(inode);
return;
} else if (inode->i_size == hip->phys_size)
return;
blk_cnt = (inode->i_size + HFSPLUS_SB(sb)->alloc_blksz - 1) >>
HFSPLUS_SB(sb)->alloc_blksz_shift;
mutex_lock(&hip->extents_lock);
alloc_cnt = hip->alloc_blocks;
if (blk_cnt == alloc_cnt)
goto out_unlock;
res = hfs_find_init(HFSPLUS_SB(sb)->ext_tree, &fd);
if (res) {
mutex_unlock(&hip->extents_lock);
/* XXX: We lack error handling of hfsplus_file_truncate() */
return;
}
while (1) {
if (alloc_cnt == hip->first_blocks) {
hfsplus_free_extents(sb, hip->first_extents,
alloc_cnt, alloc_cnt - blk_cnt);
hfsplus_dump_extent(hip->first_extents);
hip->first_blocks = blk_cnt;
break;
}
res = __hfsplus_ext_cache_extent(&fd, inode, alloc_cnt);
if (res)
break;
start = hip->cached_start;
hfsplus_free_extents(sb, hip->cached_extents,
alloc_cnt - start, alloc_cnt - blk_cnt);
hfsplus_dump_extent(hip->cached_extents);
if (blk_cnt > start) {
hip->extent_state |= HFSPLUS_EXT_DIRTY;
break;
}
alloc_cnt = start;
hip->cached_start = hip->cached_blocks = 0;
hip->extent_state &= ~(HFSPLUS_EXT_DIRTY | HFSPLUS_EXT_NEW);
hfs_brec_remove(&fd);
}
hfs_find_exit(&fd);
hip->alloc_blocks = blk_cnt;
out_unlock:
mutex_unlock(&hip->extents_lock);
hip->phys_size = inode->i_size;
hip->fs_blocks = (inode->i_size + sb->s_blocksize - 1) >>
sb->s_blocksize_bits;
inode_set_bytes(inode, hip->fs_blocks << sb->s_blocksize_bits);
hfsplus_mark_inode_dirty(inode, HFSPLUS_I_ALLOC_DIRTY);
}
