aboutsummaryrefslogtreecommitdiff
path: root/fs/ext4
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ext4.h18
-rw-r--r--fs/ext4/extents.c24
-rw-r--r--fs/ext4/fsync.c2
-rw-r--r--fs/ext4/inode.c84
-rw-r--r--fs/ext4/super.c2
5 files changed, 61 insertions, 69 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 74664ca19e2..c831a580bd7 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -133,7 +133,7 @@ struct mpage_da_data {
int pages_written;
int retval;
};
-#define DIO_AIO_UNWRITTEN 0x1
+#define EXT4_IO_UNWRITTEN 0x1
typedef struct ext4_io_end {
struct list_head list; /* per-file finished AIO list */
struct inode *inode; /* file being written to */
@@ -355,13 +355,13 @@ struct ext4_new_group_data {
/* caller is from the direct IO path, request to creation of an
unitialized extents if not allocated, split the uninitialized
extent if blocks has been preallocated already*/
-#define EXT4_GET_BLOCKS_DIO 0x0008
+#define EXT4_GET_BLOCKS_PRE_IO 0x0008
#define EXT4_GET_BLOCKS_CONVERT 0x0010
-#define EXT4_GET_BLOCKS_DIO_CREATE_EXT (EXT4_GET_BLOCKS_DIO|\
+#define EXT4_GET_BLOCKS_IO_CREATE_EXT (EXT4_GET_BLOCKS_PRE_IO|\
EXT4_GET_BLOCKS_CREATE_UNINIT_EXT)
- /* Convert extent to initialized after direct IO complete */
-#define EXT4_GET_BLOCKS_DIO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
- EXT4_GET_BLOCKS_DIO_CREATE_EXT)
+ /* Convert extent to initialized after IO complete */
+#define EXT4_GET_BLOCKS_IO_CONVERT_EXT (EXT4_GET_BLOCKS_CONVERT|\
+ EXT4_GET_BLOCKS_IO_CREATE_EXT)
/*
* Flags used by ext4_free_blocks
@@ -700,8 +700,8 @@ struct ext4_inode_info {
qsize_t i_reserved_quota;
#endif
- /* completed async DIOs that might need unwritten extents handling */
- struct list_head i_aio_dio_complete_list;
+ /* completed IOs that might need unwritten extents handling */
+ struct list_head i_completed_io_list;
/* current io_end structure for async DIO write*/
ext4_io_end_t *cur_aio_dio;
@@ -1461,7 +1461,7 @@ extern int ext4_block_truncate_page(handle_t *handle,
struct address_space *mapping, loff_t from);
extern int ext4_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
extern qsize_t *ext4_get_reserved_space(struct inode *inode);
-extern int flush_aio_dio_completed_IO(struct inode *inode);
+extern int flush_completed_IO(struct inode *inode);
extern void ext4_da_update_reserve_space(struct inode *inode,
int used, int quota_claim);
/* ioctl.c */
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index a2c21aa09e2..90ba8d9df69 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1619,7 +1619,7 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode,
BUG_ON(path[depth].p_hdr == NULL);
/* try to insert block into found extent and return */
- if (ex && (flag != EXT4_GET_BLOCKS_DIO_CREATE_EXT)
+ if (ex && (flag != EXT4_GET_BLOCKS_PRE_IO)
&& ext4_can_extents_be_merged(inode, ex, newext)) {
ext_debug("append [%d]%d block to %d:[%d]%d (from %llu)\n",
ext4_ext_is_uninitialized(newext),
@@ -1740,7 +1740,7 @@ has_space:
merge:
/* try to merge extents to the right */
- if (flag != EXT4_GET_BLOCKS_DIO_CREATE_EXT)
+ if (flag != EXT4_GET_BLOCKS_PRE_IO)
ext4_ext_try_to_merge(inode, path, nearex);
/* try to merge extents to the left */
@@ -2984,7 +2984,7 @@ fix_extent_len:
ext4_ext_dirty(handle, inode, path + depth);
return err;
}
-static int ext4_convert_unwritten_extents_dio(handle_t *handle,
+static int ext4_convert_unwritten_extents_endio(handle_t *handle,
struct inode *inode,
struct ext4_ext_path *path)
{
@@ -3064,8 +3064,8 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
flags, allocated);
ext4_ext_show_leaf(inode, path);
- /* DIO get_block() before submit the IO, split the extent */
- if (flags == EXT4_GET_BLOCKS_DIO_CREATE_EXT) {
+ /* get_block() before submit the IO, split the extent */
+ if (flags == EXT4_GET_BLOCKS_PRE_IO) {
ret = ext4_split_unwritten_extents(handle,
inode, path, iblock,
max_blocks, flags);
@@ -3075,14 +3075,14 @@ ext4_ext_handle_uninitialized_extents(handle_t *handle, struct inode *inode,
* completed
*/
if (io)
- io->flag = DIO_AIO_UNWRITTEN;
+ io->flag = EXT4_IO_UNWRITTEN;
else
ext4_set_inode_state(inode, EXT4_STATE_DIO_UNWRITTEN);
goto out;
}
- /* async DIO end_io complete, convert the filled extent to written */
- if (flags == EXT4_GET_BLOCKS_DIO_CONVERT_EXT) {
- ret = ext4_convert_unwritten_extents_dio(handle, inode,
+ /* IO end_io complete, convert the filled extent to written */
+ if (flags == EXT4_GET_BLOCKS_CONVERT) {
+ ret = ext4_convert_unwritten_extents_endio(handle, inode,
path);
if (ret >= 0)
ext4_update_inode_fsync_trans(handle, inode, 1);
@@ -3359,9 +3359,9 @@ int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
* For non asycn direct IO case, flag the inode state
* that we need to perform convertion when IO is done.
*/
- if (flags == EXT4_GET_BLOCKS_DIO_CREATE_EXT) {
+ if (flags == EXT4_GET_BLOCKS_PRE_IO) {
if (io)
- io->flag = DIO_AIO_UNWRITTEN;
+ io->flag = EXT4_IO_UNWRITTEN;
else
ext4_set_inode_state(inode,
EXT4_STATE_DIO_UNWRITTEN);
@@ -3656,7 +3656,7 @@ int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset,
map_bh.b_state = 0;
ret = ext4_get_blocks(handle, inode, block,
max_blocks, &map_bh,
- EXT4_GET_BLOCKS_DIO_CONVERT_EXT);
+ EXT4_GET_BLOCKS_IO_CONVERT_EXT);
if (ret <= 0) {
WARN_ON(ret <= 0);
printk(KERN_ERR "%s: ext4_ext_get_blocks "
diff --git a/fs/ext4/fsync.c b/fs/ext4/fsync.c
index 98bd140aad0..0d0c3239c1c 100644
--- a/fs/ext4/fsync.c
+++ b/fs/ext4/fsync.c
@@ -63,7 +63,7 @@ int ext4_sync_file(struct file *file, struct dentry *dentry, int datasync)
if (inode->i_sb->s_flags & MS_RDONLY)
return 0;
- ret = flush_aio_dio_completed_IO(inode);
+ ret = flush_completed_IO(inode);
if (ret < 0)
return ret;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 427f4690ad6..28f116bdc40 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3468,7 +3468,7 @@ out:
return ret;
}
-static int ext4_get_block_dio_write(struct inode *inode, sector_t iblock,
+static int ext4_get_block_write(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
{
handle_t *handle = NULL;
@@ -3476,28 +3476,14 @@ static int ext4_get_block_dio_write(struct inode *inode, sector_t iblock,
unsigned max_blocks = bh_result->b_size >> inode->i_blkbits;
int dio_credits;
- ext4_debug("ext4_get_block_dio_write: inode %lu, create flag %d\n",
+ ext4_debug("ext4_get_block_write: inode %lu, create flag %d\n",
inode->i_ino, create);
/*
- * DIO VFS code passes create = 0 flag for write to
- * the middle of file. It does this to avoid block
- * allocation for holes, to prevent expose stale data
- * out when there is parallel buffered read (which does
- * not hold the i_mutex lock) while direct IO write has
- * not completed. DIO request on holes finally falls back
- * to buffered IO for this reason.
- *
- * For ext4 extent based file, since we support fallocate,
- * new allocated extent as uninitialized, for holes, we
- * could fallocate blocks for holes, thus parallel
- * buffered IO read will zero out the page when read on
- * a hole while parallel DIO write to the hole has not completed.
- *
- * when we come here, we know it's a direct IO write to
- * to the middle of file (<i_size)
- * so it's safe to override the create flag from VFS.
+ * ext4_get_block in prepare for a DIO write or buffer write.
+ * We allocate an uinitialized extent if blocks haven't been allocated.
+ * The extent will be converted to initialized after IO complete.
*/
- create = EXT4_GET_BLOCKS_DIO_CREATE_EXT;
+ create = EXT4_GET_BLOCKS_IO_CREATE_EXT;
if (max_blocks > DIO_MAX_BLOCKS)
max_blocks = DIO_MAX_BLOCKS;
@@ -3524,19 +3510,20 @@ static void ext4_free_io_end(ext4_io_end_t *io)
iput(io->inode);
kfree(io);
}
-static void dump_aio_dio_list(struct inode * inode)
+
+static void dump_completed_IO(struct inode * inode)
{
#ifdef EXT4_DEBUG
struct list_head *cur, *before, *after;
ext4_io_end_t *io, *io0, *io1;
- if (list_empty(&EXT4_I(inode)->i_aio_dio_complete_list)){
- ext4_debug("inode %lu aio dio list is empty\n", inode->i_ino);
+ if (list_empty(&EXT4_I(inode)->i_completed_io_list)){
+ ext4_debug("inode %lu completed_io list is empty\n", inode->i_ino);
return;
}
- ext4_debug("Dump inode %lu aio_dio_completed_IO list \n", inode->i_ino);
- list_for_each_entry(io, &EXT4_I(inode)->i_aio_dio_complete_list, list){
+ ext4_debug("Dump inode %lu completed_io list \n", inode->i_ino);
+ list_for_each_entry(io, &EXT4_I(inode)->i_completed_io_list, list){
cur = &io->list;
before = cur->prev;
io0 = container_of(before, ext4_io_end_t, list);
@@ -3552,21 +3539,21 @@ static void dump_aio_dio_list(struct inode * inode)
/*
* check a range of space and convert unwritten extents to written.
*/
-static int ext4_end_aio_dio_nolock(ext4_io_end_t *io)
+static int ext4_end_io_nolock(ext4_io_end_t *io)
{
struct inode *inode = io->inode;
loff_t offset = io->offset;
ssize_t size = io->size;
int ret = 0;
- ext4_debug("end_aio_dio_onlock: io 0x%p from inode %lu,list->next 0x%p,"
+ ext4_debug("ext4_end_io_nolock: io 0x%p from inode %lu,list->next 0x%p,"
"list->prev 0x%p\n",
io, inode->i_ino, io->list.next, io->list.prev);
if (list_empty(&io->list))
return ret;
- if (io->flag != DIO_AIO_UNWRITTEN)
+ if (io->flag != EXT4_IO_UNWRITTEN)
return ret;
if (offset + size <= i_size_read(inode))
@@ -3584,17 +3571,18 @@ static int ext4_end_aio_dio_nolock(ext4_io_end_t *io)
io->flag = 0;
return ret;
}
+
/*
* work on completed aio dio IO, to convert unwritten extents to extents
*/
-static void ext4_end_aio_dio_work(struct work_struct *work)
+static void ext4_end_io_work(struct work_struct *work)
{
ext4_io_end_t *io = container_of(work, ext4_io_end_t, work);
struct inode *inode = io->inode;
int ret = 0;
mutex_lock(&inode->i_mutex);
- ret = ext4_end_aio_dio_nolock(io);
+ ret = ext4_end_io_nolock(io);
if (ret >= 0) {
if (!list_empty(&io->list))
list_del_init(&io->list);
@@ -3602,32 +3590,35 @@ static void ext4_end_aio_dio_work(struct work_struct *work)
}
mutex_unlock(&inode->i_mutex);
}
+
/*
* This function is called from ext4_sync_file().
*
- * When AIO DIO IO is completed, the work to convert unwritten
- * extents to written is queued on workqueue but may not get immediately
+ * When IO is completed, the work to convert unwritten extents to
+ * written is queued on workqueue but may not get immediately
* scheduled. When fsync is called, we need to ensure the
* conversion is complete before fsync returns.
- * The inode keeps track of a list of completed AIO from DIO path
- * that might needs to do the conversion. This function walks through
- * the list and convert the related unwritten extents to written.
+ * The inode keeps track of a list of pending/completed IO that
+ * might needs to do the conversion. This function walks through
+ * the list and convert the related unwritten extents for completed IO
+ * to written.
+ * The function return the number of pending IOs on success.
*/
-int flush_aio_dio_completed_IO(struct inode *inode)
+int flush_completed_IO(struct inode *inode)
{
ext4_io_end_t *io;
int ret = 0;
int ret2 = 0;
- if (list_empty(&EXT4_I(inode)->i_aio_dio_complete_list))
+ if (list_empty(&EXT4_I(inode)->i_completed_io_list))
return ret;
- dump_aio_dio_list(inode);
- while (!list_empty(&EXT4_I(inode)->i_aio_dio_complete_list)){
- io = list_entry(EXT4_I(inode)->i_aio_dio_complete_list.next,
+ dump_completed_IO(inode);
+ while (!list_empty(&EXT4_I(inode)->i_completed_io_list)){
+ io = list_entry(EXT4_I(inode)->i_completed_io_list.next,
ext4_io_end_t, list);
/*
- * Calling ext4_end_aio_dio_nolock() to convert completed
+ * Calling ext4_end_io_nolock() to convert completed
* IO to written.
*
* When ext4_sync_file() is called, run_queue() may already
@@ -3640,7 +3631,7 @@ int flush_aio_dio_completed_IO(struct inode *inode)
* avoid double converting from both fsync and background work
* queue work.
*/
- ret = ext4_end_aio_dio_nolock(io);
+ ret = ext4_end_io_nolock(io);
if (ret < 0)
ret2 = ret;
else
@@ -3662,7 +3653,7 @@ static ext4_io_end_t *ext4_init_io_end (struct inode *inode)
io->offset = 0;
io->size = 0;
io->error = 0;
- INIT_WORK(&io->work, ext4_end_aio_dio_work);
+ INIT_WORK(&io->work, ext4_end_io_work);
INIT_LIST_HEAD(&io->list);
}
@@ -3685,7 +3676,7 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
size);
/* if not aio dio with unwritten extents, just free io and return */
- if (io_end->flag != DIO_AIO_UNWRITTEN){
+ if (io_end->flag != EXT4_IO_UNWRITTEN){
ext4_free_io_end(io_end);
iocb->private = NULL;
return;
@@ -3700,9 +3691,10 @@ static void ext4_end_io_dio(struct kiocb *iocb, loff_t offset,
/* Add the io_end to per-inode completed aio dio list*/
list_add_tail(&io_end->list,
- &EXT4_I(io_end->inode)->i_aio_dio_complete_list);
+ &EXT4_I(io_end->inode)->i_completed_io_list);
iocb->private = NULL;
}
+
/*
* For ext4 extent files, ext4 will do direct-io write to holes,
* preallocated extents, and those write extend the file, no need to
@@ -3772,7 +3764,7 @@ static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
ret = blockdev_direct_IO(rw, iocb, inode,
inode->i_sb->s_bdev, iov,
offset, nr_segs,
- ext4_get_block_dio_write,
+ ext4_get_block_write,
ext4_end_io_dio);
if (iocb->private)
EXT4_I(inode)->cur_aio_dio = NULL;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c832508d551..dc7a97e79e3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -708,7 +708,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
#ifdef CONFIG_QUOTA
ei->i_reserved_quota = 0;
#endif
- INIT_LIST_HEAD(&ei->i_aio_dio_complete_list);
+ INIT_LIST_HEAD(&ei->i_completed_io_list);
ei->cur_aio_dio = NULL;
ei->i_sync_tid = 0;
ei->i_datasync_tid = 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-23 11:11:09 +0000