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Diffstat (limited to 'fs/ext4/inode.c')
-rw-r--r--fs/ext4/inode.c86
1 files changed, 62 insertions, 24 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 33a509c876ee..ec28e8ebb984 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -71,10 +71,9 @@ static __u32 ext4_inode_csum(struct inode *inode, struct ext4_inode *raw,
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;
@@ -1324,8 +1323,11 @@ static int ext4_write_end(struct file *file,
if (ext4_has_inline_data(inode)) {
ret = ext4_write_inline_data_end(inode, pos, len,
copied, page);
- if (ret < 0)
+ if (ret < 0) {
+ unlock_page(page);
+ put_page(page);
goto errout;
+ }
copied = ret;
} else
copied = block_write_end(file, mapping, pos,
@@ -1379,7 +1381,9 @@ errout:
* set the buffer to be dirty, since in data=journalled mode we need
* to call ext4_handle_dirty_metadata() instead.
*/
-static void zero_new_buffers(struct page *page, unsigned from, unsigned to)
+static void ext4_journalled_zero_new_buffers(handle_t *handle,
+ struct page *page,
+ unsigned from, unsigned to)
{
unsigned int block_start = 0, block_end;
struct buffer_head *head, *bh;
@@ -1396,7 +1400,7 @@ static void zero_new_buffers(struct page *page, unsigned from, unsigned to)
size = min(to, block_end) - start;
zero_user(page, start, size);
- set_buffer_uptodate(bh);
+ write_end_fn(handle, bh);
}
clear_buffer_new(bh);
}
@@ -1425,18 +1429,25 @@ static int ext4_journalled_write_end(struct file *file,
BUG_ON(!ext4_handle_valid(handle));
- if (ext4_has_inline_data(inode))
- copied = ext4_write_inline_data_end(inode, pos, len,
- copied, page);
- else {
- if (copied < len) {
- if (!PageUptodate(page))
- copied = 0;
- zero_new_buffers(page, from+copied, to);
+ if (ext4_has_inline_data(inode)) {
+ ret = ext4_write_inline_data_end(inode, pos, len,
+ copied, page);
+ if (ret < 0) {
+ unlock_page(page);
+ put_page(page);
+ goto errout;
}
-
+ copied = ret;
+ } else if (unlikely(copied < len) && !PageUptodate(page)) {
+ copied = 0;
+ ext4_journalled_zero_new_buffers(handle, page, from, to);
+ } else {
+ if (unlikely(copied < len))
+ ext4_journalled_zero_new_buffers(handle, page,
+ from + copied, to);
ret = ext4_walk_page_buffers(handle, page_buffers(page), from,
- to, &partial, write_end_fn);
+ from + copied, &partial,
+ write_end_fn);
if (!partial)
SetPageUptodate(page);
}
@@ -1462,6 +1473,7 @@ static int ext4_journalled_write_end(struct file *file,
*/
ext4_orphan_add(handle, inode);
+errout:
ret2 = ext4_journal_stop(handle);
if (!ret)
ret = ret2;
@@ -2095,15 +2107,29 @@ static int ext4_writepage(struct page *page,
static int mpage_submit_page(struct mpage_da_data *mpd, struct page *page)
{
int len;
- loff_t size = i_size_read(mpd->inode);
+ loff_t size;
int err;
BUG_ON(page->index != mpd->first_page);
+ clear_page_dirty_for_io(page);
+ /*
+ * We have to be very careful here! Nothing protects writeback path
+ * against i_size changes and the page can be writeably mapped into
+ * page tables. So an application can be growing i_size and writing
+ * data through mmap while writeback runs. clear_page_dirty_for_io()
+ * write-protects our page in page tables and the page cannot get
+ * written to again until we release page lock. So only after
+ * clear_page_dirty_for_io() we are safe to sample i_size for
+ * ext4_bio_write_page() to zero-out tail of the written page. We rely
+ * on the barrier provided by TestClearPageDirty in
+ * clear_page_dirty_for_io() to make sure i_size is really sampled only
+ * after page tables are updated.
+ */
+ size = i_size_read(mpd->inode);
if (page->index == size >> PAGE_SHIFT)
len = size & ~PAGE_MASK;
else
len = PAGE_SIZE;
- clear_page_dirty_for_io(page);
err = ext4_bio_write_page(&mpd->io_submit, page, len, mpd->wbc, false);
if (!err)
mpd->wbc->nr_to_write--;
@@ -2193,7 +2219,7 @@ static int mpage_process_page_bufs(struct mpage_da_data *mpd,
{
struct inode *inode = mpd->inode;
int err;
- ext4_lblk_t blocks = (i_size_read(inode) + (1 << inode->i_blkbits) - 1)
+ ext4_lblk_t blocks = (i_size_read(inode) + i_blocksize(inode) - 1)
>> inode->i_blkbits;
do {
@@ -3442,14 +3468,14 @@ static ssize_t ext4_direct_IO_write(struct kiocb *iocb, struct iov_iter *iter)
* 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 &&
+ if (round_down(offset, i_blocksize(inode)) >= 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) ||
- round_down(offset, 1 << inode->i_blkbits) >= inode->i_size) {
+ round_down(offset, i_blocksize(inode)) >= inode->i_size) {
get_block_func = ext4_dio_get_block;
dio_flags = DIO_LOCKING | DIO_SKIP_HOLES;
} else if (is_sync_kiocb(iocb)) {
@@ -3811,6 +3837,10 @@ static int ext4_block_truncate_page(handle_t *handle,
unsigned blocksize;
struct inode *inode = mapping->host;
+ /* If we are processing an encrypted inode during orphan list handling */
+ if (ext4_encrypted_inode(inode) && !fscrypt_has_encryption_key(inode))
+ return 0;
+
blocksize = inode->i_sb->s_blocksize;
length = blocksize - (offset & (blocksize - 1));
@@ -4028,6 +4058,8 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
inode->i_mtime = inode->i_ctime = ext4_current_time(inode);
ext4_mark_inode_dirty(handle, inode);
+ if (ret >= 0)
+ ext4_update_inode_fsync_trans(handle, inode, 1);
out_stop:
ext4_journal_stop(handle);
out_dio:
@@ -5030,7 +5062,7 @@ static void ext4_wait_for_tail_page_commit(struct inode *inode)
* do. We do the check mainly to optimize the common PAGE_SIZE ==
* blocksize case
*/
- if (offset > PAGE_SIZE - (1 << inode->i_blkbits))
+ if (offset > PAGE_SIZE - i_blocksize(inode))
return;
while (1) {
page = find_lock_page(inode->i_mapping,
@@ -5425,8 +5457,9 @@ static int ext4_expand_extra_isize(struct inode *inode,
/* No extended attributes present */
if (!ext4_test_inode_state(inode, EXT4_STATE_XATTR) ||
header->h_magic != cpu_to_le32(EXT4_XATTR_MAGIC)) {
- memset((void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE, 0,
- new_extra_isize);
+ memset((void *)raw_inode + EXT4_GOOD_OLD_INODE_SIZE +
+ EXT4_I(inode)->i_extra_isize, 0,
+ new_extra_isize - EXT4_I(inode)->i_extra_isize);
EXT4_I(inode)->i_extra_isize = new_extra_isize;
return 0;
}
@@ -5670,6 +5703,11 @@ int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
file_update_time(vma->vm_file);
down_read(&EXT4_I(inode)->i_mmap_sem);
+
+ ret = ext4_convert_inline_data(inode);
+ if (ret)
+ goto out_ret;
+
/* Delalloc case is easy... */
if (test_opt(inode->i_sb, DELALLOC) &&
!ext4_should_journal_data(inode) &&
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-27 16:44:51 +0000