return size;
}
+/*
+ * Calculate the number of metadata blocks needed
+ * to allocate @blocks
+ * Worse case is one block per extent
+ */
+int ext4_ext_calc_metadata_amount(struct inode *inode, int blocks)
+{
+ int lcap, icap, rcap, leafs, idxs, num;
+ int newextents = blocks;
+
+ rcap = ext4_ext_space_root_idx(inode);
+ lcap = ext4_ext_space_block(inode);
+ icap = ext4_ext_space_block_idx(inode);
+
+ /* number of new leaf blocks needed */
+ num = leafs = (newextents + lcap - 1) / lcap;
+
+ /*
+ * Worse case, we need separate index block(s)
+ * to link all new leaf blocks
+ */
+ idxs = (leafs + icap - 1) / icap;
+ do {
+ num += idxs;
+ idxs = (idxs + icap - 1) / icap;
+ } while (idxs > rcap);
+
+ return num;
+}
+
static int
ext4_ext_max_entries(struct inode *inode, int depth)
{
int err = 0, depth, ret;
unsigned long allocated = 0;
struct ext4_allocation_request ar;
+ loff_t disksize;
__clear_bit(BH_New, &bh_result->b_state);
ext_debug("blocks %u/%lu requested for inode %u\n",
newblock = ext_pblock(&newex);
allocated = ext4_ext_get_actual_len(&newex);
outnew:
- if (extend_disksize && inode->i_size > EXT4_I(inode)->i_disksize)
- EXT4_I(inode)->i_disksize = inode->i_size;
+ if (extend_disksize) {
+ disksize = ((loff_t) iblock + ar.len) << inode->i_blkbits;
+ if (disksize > i_size_read(inode))
+ disksize = i_size_read(inode);
+ if (disksize > EXT4_I(inode)->i_disksize)
+ EXT4_I(inode)->i_disksize = disksize;
+ }
set_buffer_new(bh_result);
return err ? err : allocated;
}
-void ext4_ext_truncate(struct inode * inode, struct page *page)
+void ext4_ext_truncate(struct inode *inode)
{
struct address_space *mapping = inode->i_mapping;
struct super_block *sb = inode->i_sb;
*/
err = ext4_writepage_trans_blocks(inode) + 3;
handle = ext4_journal_start(inode, err);
- if (IS_ERR(handle)) {
- if (page) {
- clear_highpage(page);
- flush_dcache_page(page);
- unlock_page(page);
- page_cache_release(page);
- }
+ if (IS_ERR(handle))
return;
- }
- if (page)
- ext4_block_truncate_page(handle, page, mapping, inode->i_size);
+ if (inode->i_size & (sb->s_blocksize - 1))
+ ext4_block_truncate_page(handle, mapping, inode->i_size);
+
+ if (ext4_orphan_add(handle, inode))
+ goto out_stop;
down_write(&EXT4_I(inode)->i_data_sem);
ext4_ext_invalidate_cache(inode);
* Probably we need not scan at all,
* because page truncation is enough.
*/
- if (ext4_orphan_add(handle, inode))
- goto out_stop;
/* we have to know where to truncate from in crash case */
EXT4_I(inode)->i_disksize = inode->i_size;
handle->h_sync = 1;
out_stop:
+ up_write(&EXT4_I(inode)->i_data_sem);
/*
* If this was a simple ftruncate() and the file will remain alive,
* then we need to clear up the orphan record which we created above.
if (inode->i_nlink)
ext4_orphan_del(handle, inode);
- up_write(&EXT4_I(inode)->i_data_sem);
inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
ext4_mark_inode_dirty(handle, inode);
ext4_journal_stop(handle);
}
ret = ext4_get_blocks_wrap(handle, inode, block,
max_blocks, &map_bh,
- EXT4_CREATE_UNINITIALIZED_EXT, 0);
+ EXT4_CREATE_UNINITIALIZED_EXT, 0, 0);
if (ret <= 0) {
#ifdef EXT4FS_DEBUG
WARN_ON(ret <= 0);