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Commit 754cfed6 authored by Theodore Ts'o's avatar Theodore Ts'o
Browse files

ext4: drop the EXT4_STATE_DELALLOC_RESERVED flag 



Having done a full regression test, we can now drop the
DELALLOC_RESERVED state flag.

Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
parent e3cf5d5d

fs/ext4/ext4.h

+0 −1
Original line number Diff line number Diff line
@@ -1400,7 +1400,6 @@ enum { 
	EXT4_STATE_EXT_MIGRATE,		/* Inode is migrating */

	EXT4_STATE_DIO_UNWRITTEN,	/* need convert on dio done*/

	EXT4_STATE_NEWENTRY,		/* File just added to dir */

	EXT4_STATE_DELALLOC_RESERVED,	/* blks already reserved for delalloc */

	EXT4_STATE_DIOREAD_LOCK,	/* Disable support for dio read

					   nolocking */

	EXT4_STATE_MAY_INLINE_DATA,	/* may have in-inode data */

fs/ext4/inode.c

+4 −16
Original line number Diff line number Diff line
@@ -595,14 +595,6 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, 
	 */

	down_write(&EXT4_I(inode)->i_data_sem);



	/*

	 * if the caller is from delayed allocation writeout path

	 * we have already reserved fs blocks for allocation

	 * let the underlying get_block() function know to

	 * avoid double accounting

	 */

	if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)

		ext4_set_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);

	/*

	 * We need to check for EXT4 here because migrate

	 * could have changed the inode type in between
@@ -631,8 +623,6 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, 
			(flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE))

			ext4_da_update_reserve_space(inode, retval, 1);

	}

	if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)

		ext4_clear_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED);



	if (retval > 0) {

		unsigned int status;
@@ -2004,12 +1994,10 @@ static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd) 
	 * in data loss.  So use reserved blocks to allocate metadata if

	 * possible.

	 *

	 * We pass in the magic EXT4_GET_BLOCKS_DELALLOC_RESERVE if the blocks

	 * in question are delalloc blocks.  This affects functions in many

	 * different parts of the allocation call path.  This flag exists

	 * primarily because we don't want to change *many* call functions, so

	 * ext4_map_blocks() will set the EXT4_STATE_DELALLOC_RESERVED flag

	 * once the inode's allocation semaphore is taken.

	 * We pass in the magic EXT4_GET_BLOCKS_DELALLOC_RESERVE if

	 * the blocks in question are delalloc blocks.  This indicates

	 * that the blocks and quotas has already been checked when

	 * the data was copied into the page cache.

	 */

	get_blocks_flags = EXT4_GET_BLOCKS_CREATE |

			   EXT4_GET_BLOCKS_METADATA_NOFAIL;

fs/ext4/mballoc.c

+0 −10
Original line number Diff line number Diff line
@@ -4410,16 +4410,6 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, 
	if (IS_NOQUOTA(ar->inode))

		ar->flags |= EXT4_MB_USE_ROOT_BLOCKS;



	/*

	 * For delayed allocation, we could skip the ENOSPC and

	 * EDQUOT check, as blocks and quotas have been already

	 * reserved when data being copied into pagecache.

	 */

	if (ext4_test_inode_state(ar->inode, EXT4_STATE_DELALLOC_RESERVED)) {

		WARN_ON((ar->flags & EXT4_MB_DELALLOC_RESERVED) == 0);

		ar->flags |= EXT4_MB_DELALLOC_RESERVED;

	}



	if ((ar->flags & EXT4_MB_DELALLOC_RESERVED) == 0) {

		/* Without delayed allocation we need to verify

		 * there is enough free blocks to do block allocation