csum = ext4_chksum(sbi, csum, (__u8 *)&dummy_csum,
csum_size);
offset += csum_size;
- csum = ext4_chksum(sbi, csum, (__u8 *)raw + offset,
- EXT4_INODE_SIZE(inode->i_sb) -
- offset);
}
+ csum = ext4_chksum(sbi, csum, (__u8 *)raw + offset,
+ EXT4_INODE_SIZE(inode->i_sb) - offset);
}
return csum;
if (flags & EXT4_GET_BLOCKS_ZERO &&
map->m_flags & EXT4_MAP_MAPPED &&
map->m_flags & EXT4_MAP_NEW) {
- ext4_lblk_t i;
-
- for (i = 0; i < map->m_len; i++) {
- unmap_underlying_metadata(inode->i_sb->s_bdev,
- map->m_pblk + i);
- }
+ clean_bdev_aliases(inode->i_sb->s_bdev, map->m_pblk,
+ map->m_len);
ret = ext4_issue_zeroout(inode, map->m_lblk,
map->m_pblk, map->m_len);
if (ret) {
if (err)
break;
if (buffer_new(bh)) {
- unmap_underlying_metadata(bh->b_bdev,
- bh->b_blocknr);
+ clean_bdev_bh_alias(bh);
if (PageUptodate(page)) {
clear_buffer_new(bh);
set_buffer_uptodate(bh);
BUG_ON(map->m_len == 0);
if (map->m_flags & EXT4_MAP_NEW) {
- struct block_device *bdev = inode->i_sb->s_bdev;
- int i;
-
- for (i = 0; i < map->m_len; i++)
- unmap_underlying_metadata(bdev, map->m_pblk + i);
+ clean_bdev_aliases(inode->i_sb->s_bdev, map->m_pblk,
+ map->m_len);
}
return 0;
}
index = pos >> PAGE_SHIFT;
- if (ext4_nonda_switch(inode->i_sb)) {
+ if (ext4_nonda_switch(inode->i_sb) ||
+ S_ISLNK(inode->i_mode)) {
*fsdata = (void *)FALL_BACK_TO_NONDELALLOC;
return ext4_write_begin(file, mapping, pos,
len, flags, pagep, fsdata);
}
#ifdef CONFIG_FS_DAX
-/*
- * Get block function for DAX IO and mmap faults. It takes care of converting
- * unwritten extents to written ones and initializes new / converted blocks
- * to zeros.
- */
-int ext4_dax_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
-{
- int ret;
-
- ext4_debug("inode %lu, create flag %d\n", inode->i_ino, create);
- if (!create)
- return _ext4_get_block(inode, iblock, bh_result, 0);
-
- ret = ext4_get_block_trans(inode, iblock, bh_result,
- EXT4_GET_BLOCKS_PRE_IO |
- EXT4_GET_BLOCKS_CREATE_ZERO);
- if (ret < 0)
- return ret;
-
- if (buffer_unwritten(bh_result)) {
- /*
- * We are protected by i_mmap_sem or i_mutex so we know block
- * cannot go away from under us even though we dropped
- * i_data_sem. Convert extent to written and write zeros there.
- */
- ret = ext4_get_block_trans(inode, iblock, bh_result,
- EXT4_GET_BLOCKS_CONVERT |
- EXT4_GET_BLOCKS_CREATE_ZERO);
- if (ret < 0)
- return ret;
- }
- /*
- * At least for now we have to clear BH_New so that DAX code
- * doesn't attempt to zero blocks again in a racy way.
- */
- clear_buffer_new(bh_result);
- return 0;
-}
-
static int ext4_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
unsigned flags, struct iomap *iomap)
{
.iomap_end = ext4_iomap_end,
};
-#else
-/* Just define empty function, it will never get called. */
-int ext4_dax_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
-{
- BUG();
- return 0;
-}
#endif
static int ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
iocb->private = NULL;
if (overwrite)
get_block_func = ext4_dio_get_block_overwrite;
- else if (IS_DAX(inode)) {
- /*
- * We can avoid zeroing for aligned DAX writes beyond EOF. Other
- * writes need zeroing either because they can race with page
- * faults or because they use partial blocks.
- */
- if (round_down(offset, 1<<inode->i_blkbits) >= inode->i_size &&
- ext4_aligned_io(inode, offset, count))
- get_block_func = ext4_dio_get_block;
- else
- get_block_func = ext4_dax_get_block;
- dio_flags = DIO_LOCKING;
- } else if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS) ||
+ else if (!ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS) ||
round_down(offset, 1 << inode->i_blkbits) >= inode->i_size) {
get_block_func = ext4_dio_get_block;
dio_flags = DIO_LOCKING | DIO_SKIP_HOLES;
#ifdef CONFIG_EXT4_FS_ENCRYPTION
BUG_ON(ext4_encrypted_inode(inode) && S_ISREG(inode->i_mode));
#endif
- if (IS_DAX(inode)) {
- ret = dax_do_io(iocb, inode, iter, get_block_func,
- ext4_end_io_dio, dio_flags);
- } else
- ret = __blockdev_direct_IO(iocb, inode,
- inode->i_sb->s_bdev, iter,
- get_block_func,
- ext4_end_io_dio, NULL, dio_flags);
+ ret = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev, iter,
+ get_block_func, ext4_end_io_dio, NULL,
+ dio_flags);
if (ret > 0 && !overwrite && ext4_test_inode_state(inode,
EXT4_STATE_DIO_UNWRITTEN)) {
{
struct address_space *mapping = iocb->ki_filp->f_mapping;
struct inode *inode = mapping->host;
+ size_t count = iov_iter_count(iter);
ssize_t ret;
/*
* we are protected against page writeback as well.
*/
inode_lock_shared(inode);
- if (IS_DAX(inode)) {
- ret = dax_do_io(iocb, inode, iter, ext4_dio_get_block, NULL, 0);
- } else {
- size_t count = iov_iter_count(iter);
-
- ret = filemap_write_and_wait_range(mapping, iocb->ki_pos,
- iocb->ki_pos + count);
- if (ret)
- goto out_unlock;
- ret = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
- iter, ext4_dio_get_block,
- NULL, NULL, 0);
- }
+ ret = filemap_write_and_wait_range(mapping, iocb->ki_pos,
+ iocb->ki_pos + count);
+ if (ret)
+ goto out_unlock;
+ ret = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
+ iter, ext4_dio_get_block, NULL, NULL, 0);
out_unlock:
inode_unlock_shared(inode);
return ret;
if (ext4_has_inline_data(inode))
return 0;
+ /* DAX uses iomap path now */
+ if (WARN_ON_ONCE(IS_DAX(inode)))
+ return 0;
+
trace_ext4_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
if (iov_iter_rw(iter) == READ)
ret = ext4_direct_IO_read(iocb, iter);
return __set_page_dirty_nobuffers(page);
}
+static int ext4_set_page_dirty(struct page *page)
+{
+ WARN_ON_ONCE(!PageLocked(page) && !PageDirty(page));
+ WARN_ON_ONCE(!page_has_buffers(page));
+ return __set_page_dirty_buffers(page);
+}
+
static const struct address_space_operations ext4_aops = {
.readpage = ext4_readpage,
.readpages = ext4_readpages,
.writepages = ext4_writepages,
.write_begin = ext4_write_begin,
.write_end = ext4_write_end,
+ .set_page_dirty = ext4_set_page_dirty,
.bmap = ext4_bmap,
.invalidatepage = ext4_invalidatepage,
.releasepage = ext4_releasepage,
.writepages = ext4_writepages,
.write_begin = ext4_da_write_begin,
.write_end = ext4_da_write_end,
+ .set_page_dirty = ext4_set_page_dirty,
.bmap = ext4_bmap,
.invalidatepage = ext4_da_invalidatepage,
.releasepage = ext4_releasepage,
/* We expect the key to be set. */
BUG_ON(!fscrypt_has_encryption_key(inode));
BUG_ON(blocksize != PAGE_SIZE);
- BUG_ON(!PageLocked(page));
WARN_ON_ONCE(fscrypt_decrypt_page(page->mapping->host,
page, PAGE_SIZE, 0, page->index));
}
{
__le32 *magic = (void *)raw_inode +
EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize;
- if (*magic == cpu_to_le32(EXT4_XATTR_MAGIC)) {
+ if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize + sizeof(__le32) <=
+ EXT4_INODE_SIZE(inode->i_sb) &&
+ *magic == cpu_to_le32(EXT4_XATTR_MAGIC)) {
ext4_set_inode_state(inode, EXT4_STATE_XATTR);
ext4_find_inline_data_nolock(inode);
} else
struct inode *inode;
journal_t *journal = EXT4_SB(sb)->s_journal;
long ret;
+ loff_t size;
int block;
uid_t i_uid;
gid_t i_gid;
if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
ei->i_extra_isize = le16_to_cpu(raw_inode->i_extra_isize);
if (EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize >
- EXT4_INODE_SIZE(inode->i_sb)) {
- EXT4_ERROR_INODE(inode, "bad extra_isize (%u != %u)",
- EXT4_GOOD_OLD_INODE_SIZE + ei->i_extra_isize,
- EXT4_INODE_SIZE(inode->i_sb));
+ EXT4_INODE_SIZE(inode->i_sb) ||
+ (ei->i_extra_isize & 3)) {
+ EXT4_ERROR_INODE(inode,
+ "bad extra_isize %u (inode size %u)",
+ ei->i_extra_isize,
+ EXT4_INODE_SIZE(inode->i_sb));
ret = -EFSCORRUPTED;
goto bad_inode;
}
ei->i_file_acl |=
((__u64)le16_to_cpu(raw_inode->i_file_acl_high)) << 32;
inode->i_size = ext4_isize(raw_inode);
+ if ((size = i_size_read(inode)) < 0) {
+ EXT4_ERROR_INODE(inode, "bad i_size value: %lld", size);
+ ret = -EFSCORRUPTED;
+ goto bad_inode;
+ }
ei->i_disksize = inode->i_size;
#ifdef CONFIG_QUOTA
ei->i_reserved_quota = 0;
if (EXT4_INODE_SIZE(inode->i_sb) > EXT4_GOOD_OLD_INODE_SIZE) {
if (ei->i_extra_isize == 0) {
/* The extra space is currently unused. Use it. */
+ BUILD_BUG_ON(sizeof(struct ext4_inode) & 3);
ei->i_extra_isize = sizeof(struct ext4_inode) -
EXT4_GOOD_OLD_INODE_SIZE;
} else {
projects / mirror_ubuntu-artful-kernel.git / blobdiff