From e3cf5d5d9a86df1c5e413bdd3725c25a16ff854c Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Thu, 4 Sep 2014 18:07:25 -0400 Subject: [PATCH] ext4: prepare to drop EXT4_STATE_DELALLOC_RESERVED The EXT4_STATE_DELALLOC_RESERVED flag was originally implemented because it was too hard to make sure the mballoc and get_block flags could be reliably passed down through all of the codepaths that end up calling ext4_mb_new_blocks(). Since then, we have mb_flags passed down through most of the code paths, so getting rid of EXT4_STATE_DELALLOC_RESERVED isn't as tricky as it used to. This commit plumbs in the last of what is required, and then adds a WARN_ON check to make sure we haven't missed anything. If this passes a full regression test run, we can then drop EXT4_STATE_DELALLOC_RESERVED. Signed-off-by: Theodore Ts'o Reviewed-by: Jan Kara --- fs/ext4/balloc.c | 3 +-- fs/ext4/extents.c | 6 +++++- fs/ext4/indirect.c | 6 +++++- fs/ext4/mballoc.c | 10 ++++++---- fs/ext4/xattr.c | 6 ------ 5 files changed, 17 insertions(+), 14 deletions(-) diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c index 581ef40fbe90..d70f154f6da3 100644 --- a/fs/ext4/balloc.c +++ b/fs/ext4/balloc.c @@ -636,8 +636,7 @@ ext4_fsblk_t ext4_new_meta_blocks(handle_t *handle, struct inode *inode, * Account for the allocated meta blocks. We will never * fail EDQUOT for metdata, but we do account for it. */ - if (!(*errp) && - ext4_test_inode_state(inode, EXT4_STATE_DELALLOC_RESERVED)) { + if (!(*errp) && (flags & EXT4_MB_DELALLOC_RESERVED)) { spin_lock(&EXT4_I(inode)->i_block_reservation_lock); spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); dquot_alloc_block_nofail(inode, diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 3ac1686efff8..8170b3254767 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -1933,6 +1933,8 @@ int ext4_ext_insert_extent(handle_t *handle, struct inode *inode, ext4_lblk_t next; int mb_flags = 0, unwritten; + if (gb_flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) + mb_flags |= EXT4_MB_DELALLOC_RESERVED; if (unlikely(ext4_ext_get_actual_len(newext) == 0)) { EXT4_ERROR_INODE(inode, "ext4_ext_get_actual_len(newext) == 0"); return -EIO; @@ -2054,7 +2056,7 @@ prepend: * We're gonna add a new leaf in the tree. */ if (gb_flags & EXT4_GET_BLOCKS_METADATA_NOFAIL) - mb_flags = EXT4_MB_USE_RESERVED; + mb_flags |= EXT4_MB_USE_RESERVED; err = ext4_ext_create_new_leaf(handle, inode, mb_flags, gb_flags, ppath, newext); if (err) @@ -4438,6 +4440,8 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode, ar.flags = 0; if (flags & EXT4_GET_BLOCKS_NO_NORMALIZE) ar.flags |= EXT4_MB_HINT_NOPREALLOC; + if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) + ar.flags |= EXT4_MB_DELALLOC_RESERVED; newblock = ext4_mb_new_blocks(handle, &ar, &err); if (!newblock) goto out2; diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c index 69af0cd64724..36b369697a13 100644 --- a/fs/ext4/indirect.c +++ b/fs/ext4/indirect.c @@ -333,7 +333,9 @@ static int ext4_alloc_branch(handle_t *handle, new_blocks[i] = ext4_mb_new_blocks(handle, ar, &err); } else ar->goal = new_blocks[i] = ext4_new_meta_blocks(handle, - ar->inode, ar->goal, 0, NULL, &err); + ar->inode, ar->goal, + ar->flags & EXT4_MB_DELALLOC_RESERVED, + NULL, &err); if (err) { i--; goto failed; @@ -572,6 +574,8 @@ int ext4_ind_map_blocks(handle_t *handle, struct inode *inode, ar.logical = map->m_lblk; if (S_ISREG(inode->i_mode)) ar.flags = EXT4_MB_HINT_DATA; + if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE) + ar.flags |= EXT4_MB_DELALLOC_RESERVED; ar.goal = ext4_find_goal(inode, map->m_lblk, partial); diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 8b0f9ef517d6..15dffdac5907 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4415,9 +4415,12 @@ ext4_fsblk_t ext4_mb_new_blocks(handle_t *handle, * 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)) + 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; - else { + } + + if ((ar->flags & EXT4_MB_DELALLOC_RESERVED) == 0) { /* Without delayed allocation we need to verify * there is enough free blocks to do block allocation * and verify allocation doesn't exceed the quota limits. @@ -4528,8 +4531,7 @@ out: if (inquota && ar->len < inquota) dquot_free_block(ar->inode, EXT4_C2B(sbi, inquota - ar->len)); if (!ar->len) { - if (!ext4_test_inode_state(ar->inode, - EXT4_STATE_DELALLOC_RESERVED)) + if ((ar->flags & EXT4_MB_DELALLOC_RESERVED) == 0) /* release all the reserved blocks if non delalloc */ percpu_counter_sub(&sbi->s_dirtyclusters_counter, reserv_clstrs); diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index e7387337060c..da4df703c211 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -899,14 +899,8 @@ inserted: if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) goal = goal & EXT4_MAX_BLOCK_FILE_PHYS; - /* - * take i_data_sem because we will test - * i_delalloc_reserved_flag in ext4_mb_new_blocks - */ - down_read(&EXT4_I(inode)->i_data_sem); block = ext4_new_meta_blocks(handle, inode, goal, 0, NULL, &error); - up_read((&EXT4_I(inode)->i_data_sem)); if (error) goto cleanup; -- 2.20.1