ext4: convert to new aops
Convert ext4 to use write_begin()/write_end() methods. Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Dmitriy Monakhov <dmonakhov@sw.ru> Cc: Mark Fasheh <mark.fasheh@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Piggin
Linus Torvalds
parent
f4fc66a894
commit
bfc1af650a
176
fs/ext4/inode.c
176
fs/ext4/inode.c
|
|
@ -1146,34 +1146,50 @@ static int do_journal_get_write_access(handle_t *handle,
|
|||
return ext4_journal_get_write_access(handle, bh);
|
||||
}
|
||||
|
||||
static int ext4_prepare_write(struct file *file, struct page *page,
|
||||
unsigned from, unsigned to)
|
||||
static int ext4_write_begin(struct file *file, struct address_space *mapping,
|
||||
loff_t pos, unsigned len, unsigned flags,
|
||||
struct page **pagep, void **fsdata)
|
||||
{
|
||||
struct inode *inode = page->mapping->host;
|
||||
struct inode *inode = mapping->host;
|
||||
int ret, needed_blocks = ext4_writepage_trans_blocks(inode);
|
||||
handle_t *handle;
|
||||
int retries = 0;
|
||||
struct page *page;
|
||||
pgoff_t index;
|
||||
unsigned from, to;
|
||||
|
||||
index = pos >> PAGE_CACHE_SHIFT;
|
||||
from = pos & (PAGE_CACHE_SIZE - 1);
|
||||
to = from + len;
|
||||
|
||||
retry:
|
||||
handle = ext4_journal_start(inode, needed_blocks);
|
||||
if (IS_ERR(handle)) {
|
||||
ret = PTR_ERR(handle);
|
||||
goto out;
|
||||
}
|
||||
if (test_opt(inode->i_sb, NOBH) && ext4_should_writeback_data(inode))
|
||||
ret = nobh_prepare_write(page, from, to, ext4_get_block);
|
||||
else
|
||||
ret = block_prepare_write(page, from, to, ext4_get_block);
|
||||
if (ret)
|
||||
goto prepare_write_failed;
|
||||
page = __grab_cache_page(mapping, index);
|
||||
if (!page)
|
||||
return -ENOMEM;
|
||||
*pagep = page;
|
||||
|
||||
if (ext4_should_journal_data(inode)) {
|
||||
handle = ext4_journal_start(inode, needed_blocks);
|
||||
if (IS_ERR(handle)) {
|
||||
unlock_page(page);
|
||||
page_cache_release(page);
|
||||
ret = PTR_ERR(handle);
|
||||
goto out;
|
||||
}
|
||||
|
||||
ret = block_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
|
||||
ext4_get_block);
|
||||
|
||||
if (!ret && ext4_should_journal_data(inode)) {
|
||||
ret = walk_page_buffers(handle, page_buffers(page),
|
||||
from, to, NULL, do_journal_get_write_access);
|
||||
}
|
||||
prepare_write_failed:
|
||||
if (ret)
|
||||
|
||||
if (ret) {
|
||||
ext4_journal_stop(handle);
|
||||
unlock_page(page);
|
||||
page_cache_release(page);
|
||||
}
|
||||
|
||||
if (ret == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
|
||||
goto retry;
|
||||
out:
|
||||
|
|
@ -1185,12 +1201,12 @@ int ext4_journal_dirty_data(handle_t *handle, struct buffer_head *bh)
|
|||
int err = jbd2_journal_dirty_data(handle, bh);
|
||||
if (err)
|
||||
ext4_journal_abort_handle(__FUNCTION__, __FUNCTION__,
|
||||
bh, handle,err);
|
||||
bh, handle, err);
|
||||
return err;
|
||||
}
|
||||
|
||||
/* For commit_write() in data=journal mode */
|
||||
static int commit_write_fn(handle_t *handle, struct buffer_head *bh)
|
||||
/* For write_end() in data=journal mode */
|
||||
static int write_end_fn(handle_t *handle, struct buffer_head *bh)
|
||||
{
|
||||
if (!buffer_mapped(bh) || buffer_freed(bh))
|
||||
return 0;
|
||||
|
|
@ -1198,6 +1214,29 @@ static int commit_write_fn(handle_t *handle, struct buffer_head *bh)
|
|||
return ext4_journal_dirty_metadata(handle, bh);
|
||||
}
|
||||
|
||||
/*
|
||||
* Generic write_end handler for ordered and writeback ext4 journal modes.
|
||||
* We can't use generic_write_end, because that unlocks the page and we need to
|
||||
* unlock the page after ext4_journal_stop, but ext4_journal_stop must run
|
||||
* after block_write_end.
|
||||
*/
|
||||
static int ext4_generic_write_end(struct file *file,
|
||||
struct address_space *mapping,
|
||||
loff_t pos, unsigned len, unsigned copied,
|
||||
struct page *page, void *fsdata)
|
||||
{
|
||||
struct inode *inode = file->f_mapping->host;
|
||||
|
||||
copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
|
||||
|
||||
if (pos+copied > inode->i_size) {
|
||||
i_size_write(inode, pos+copied);
|
||||
mark_inode_dirty(inode);
|
||||
}
|
||||
|
||||
return copied;
|
||||
}
|
||||
|
||||
/*
|
||||
* We need to pick up the new inode size which generic_commit_write gave us
|
||||
* `file' can be NULL - eg, when called from page_symlink().
|
||||
|
|
@ -1205,78 +1244,101 @@ static int commit_write_fn(handle_t *handle, struct buffer_head *bh)
|
|||
* ext4 never places buffers on inode->i_mapping->private_list. metadata
|
||||
* buffers are managed internally.
|
||||
*/
|
||||
static int ext4_ordered_commit_write(struct file *file, struct page *page,
|
||||
unsigned from, unsigned to)
|
||||
static int ext4_ordered_write_end(struct file *file,
|
||||
struct address_space *mapping,
|
||||
loff_t pos, unsigned len, unsigned copied,
|
||||
struct page *page, void *fsdata)
|
||||
{
|
||||
handle_t *handle = ext4_journal_current_handle();
|
||||
struct inode *inode = page->mapping->host;
|
||||
struct inode *inode = file->f_mapping->host;
|
||||
unsigned from, to;
|
||||
int ret = 0, ret2;
|
||||
|
||||
from = pos & (PAGE_CACHE_SIZE - 1);
|
||||
to = from + len;
|
||||
|
||||
ret = walk_page_buffers(handle, page_buffers(page),
|
||||
from, to, NULL, ext4_journal_dirty_data);
|
||||
|
||||
if (ret == 0) {
|
||||
/*
|
||||
* generic_commit_write() will run mark_inode_dirty() if i_size
|
||||
* generic_write_end() will run mark_inode_dirty() if i_size
|
||||
* changes. So let's piggyback the i_disksize mark_inode_dirty
|
||||
* into that.
|
||||
*/
|
||||
loff_t new_i_size;
|
||||
|
||||
new_i_size = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
|
||||
new_i_size = pos + copied;
|
||||
if (new_i_size > EXT4_I(inode)->i_disksize)
|
||||
EXT4_I(inode)->i_disksize = new_i_size;
|
||||
ret = generic_commit_write(file, page, from, to);
|
||||
copied = ext4_generic_write_end(file, mapping, pos, len, copied,
|
||||
page, fsdata);
|
||||
if (copied < 0)
|
||||
ret = copied;
|
||||
}
|
||||
ret2 = ext4_journal_stop(handle);
|
||||
if (!ret)
|
||||
ret = ret2;
|
||||
return ret;
|
||||
unlock_page(page);
|
||||
page_cache_release(page);
|
||||
|
||||
return ret ? ret : copied;
|
||||
}
|
||||
|
||||
static int ext4_writeback_commit_write(struct file *file, struct page *page,
|
||||
unsigned from, unsigned to)
|
||||
static int ext4_writeback_write_end(struct file *file,
|
||||
struct address_space *mapping,
|
||||
loff_t pos, unsigned len, unsigned copied,
|
||||
struct page *page, void *fsdata)
|
||||
{
|
||||
handle_t *handle = ext4_journal_current_handle();
|
||||
struct inode *inode = page->mapping->host;
|
||||
struct inode *inode = file->f_mapping->host;
|
||||
int ret = 0, ret2;
|
||||
loff_t new_i_size;
|
||||
|
||||
new_i_size = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
|
||||
new_i_size = pos + copied;
|
||||
if (new_i_size > EXT4_I(inode)->i_disksize)
|
||||
EXT4_I(inode)->i_disksize = new_i_size;
|
||||
|
||||
if (test_opt(inode->i_sb, NOBH) && ext4_should_writeback_data(inode))
|
||||
ret = nobh_commit_write(file, page, from, to);
|
||||
else
|
||||
ret = generic_commit_write(file, page, from, to);
|
||||
copied = ext4_generic_write_end(file, mapping, pos, len, copied,
|
||||
page, fsdata);
|
||||
if (copied < 0)
|
||||
ret = copied;
|
||||
|
||||
ret2 = ext4_journal_stop(handle);
|
||||
if (!ret)
|
||||
ret = ret2;
|
||||
return ret;
|
||||
unlock_page(page);
|
||||
page_cache_release(page);
|
||||
|
||||
return ret ? ret : copied;
|
||||
}
|
||||
|
||||
static int ext4_journalled_commit_write(struct file *file,
|
||||
struct page *page, unsigned from, unsigned to)
|
||||
static int ext4_journalled_write_end(struct file *file,
|
||||
struct address_space *mapping,
|
||||
loff_t pos, unsigned len, unsigned copied,
|
||||
struct page *page, void *fsdata)
|
||||
{
|
||||
handle_t *handle = ext4_journal_current_handle();
|
||||
struct inode *inode = page->mapping->host;
|
||||
struct inode *inode = mapping->host;
|
||||
int ret = 0, ret2;
|
||||
int partial = 0;
|
||||
loff_t pos;
|
||||
unsigned from, to;
|
||||
|
||||
/*
|
||||
* Here we duplicate the generic_commit_write() functionality
|
||||
*/
|
||||
pos = ((loff_t)page->index << PAGE_CACHE_SHIFT) + to;
|
||||
from = pos & (PAGE_CACHE_SIZE - 1);
|
||||
to = from + len;
|
||||
|
||||
if (copied < len) {
|
||||
if (!PageUptodate(page))
|
||||
copied = 0;
|
||||
page_zero_new_buffers(page, from+copied, to);
|
||||
}
|
||||
|
||||
ret = walk_page_buffers(handle, page_buffers(page), from,
|
||||
to, &partial, commit_write_fn);
|
||||
to, &partial, write_end_fn);
|
||||
if (!partial)
|
||||
SetPageUptodate(page);
|
||||
if (pos > inode->i_size)
|
||||
i_size_write(inode, pos);
|
||||
if (pos+copied > inode->i_size)
|
||||
i_size_write(inode, pos+copied);
|
||||
EXT4_I(inode)->i_state |= EXT4_STATE_JDATA;
|
||||
if (inode->i_size > EXT4_I(inode)->i_disksize) {
|
||||
EXT4_I(inode)->i_disksize = inode->i_size;
|
||||
|
|
@ -1284,10 +1346,14 @@ static int ext4_journalled_commit_write(struct file *file,
|
|||
if (!ret)
|
||||
ret = ret2;
|
||||
}
|
||||
|
||||
ret2 = ext4_journal_stop(handle);
|
||||
if (!ret)
|
||||
ret = ret2;
|
||||
return ret;
|
||||
unlock_page(page);
|
||||
page_cache_release(page);
|
||||
|
||||
return ret ? ret : copied;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -1545,7 +1611,7 @@ static int ext4_journalled_writepage(struct page *page,
|
|||
PAGE_CACHE_SIZE, NULL, do_journal_get_write_access);
|
||||
|
||||
err = walk_page_buffers(handle, page_buffers(page), 0,
|
||||
PAGE_CACHE_SIZE, NULL, commit_write_fn);
|
||||
PAGE_CACHE_SIZE, NULL, write_end_fn);
|
||||
if (ret == 0)
|
||||
ret = err;
|
||||
EXT4_I(inode)->i_state |= EXT4_STATE_JDATA;
|
||||
|
|
@ -1705,8 +1771,8 @@ static const struct address_space_operations ext4_ordered_aops = {
|
|||
.readpages = ext4_readpages,
|
||||
.writepage = ext4_ordered_writepage,
|
||||
.sync_page = block_sync_page,
|
||||
.prepare_write = ext4_prepare_write,
|
||||
.commit_write = ext4_ordered_commit_write,
|
||||
.write_begin = ext4_write_begin,
|
||||
.write_end = ext4_ordered_write_end,
|
||||
.bmap = ext4_bmap,
|
||||
.invalidatepage = ext4_invalidatepage,
|
||||
.releasepage = ext4_releasepage,
|
||||
|
|
@ -1719,8 +1785,8 @@ static const struct address_space_operations ext4_writeback_aops = {
|
|||
.readpages = ext4_readpages,
|
||||
.writepage = ext4_writeback_writepage,
|
||||
.sync_page = block_sync_page,
|
||||
.prepare_write = ext4_prepare_write,
|
||||
.commit_write = ext4_writeback_commit_write,
|
||||
.write_begin = ext4_write_begin,
|
||||
.write_end = ext4_writeback_write_end,
|
||||
.bmap = ext4_bmap,
|
||||
.invalidatepage = ext4_invalidatepage,
|
||||
.releasepage = ext4_releasepage,
|
||||
|
|
@ -1733,8 +1799,8 @@ static const struct address_space_operations ext4_journalled_aops = {
|
|||
.readpages = ext4_readpages,
|
||||
.writepage = ext4_journalled_writepage,
|
||||
.sync_page = block_sync_page,
|
||||
.prepare_write = ext4_prepare_write,
|
||||
.commit_write = ext4_journalled_commit_write,
|
||||
.write_begin = ext4_write_begin,
|
||||
.write_end = ext4_journalled_write_end,
|
||||
.set_page_dirty = ext4_journalled_set_page_dirty,
|
||||
.bmap = ext4_bmap,
|
||||
.invalidatepage = ext4_invalidatepage,
|
||||
|
|
|
|||
Loading…
Reference in New Issue