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| author | Zhang Yi <yi.zhang@huawei.com> | 2024-01-27 02:58:04 +0100 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2024-02-02 05:59:21 +0100 |
| commit | 874eaba96d39334fe9c729ff631e65523616d4d8 (patch) | |
| tree | 401e4a6a4340ae92b68473fb2f02a34a63f5829f | |
| parent | ext4: add a hole extent entry in cache after punch (diff) | |
| download | linux-874eaba96d39334fe9c729ff631e65523616d4d8.tar.xz linux-874eaba96d39334fe9c729ff631e65523616d4d8.zip | |
ext4: make ext4_map_blocks() distinguish delalloc only extent
Add a new map flag EXT4_MAP_DELAYED to indicate the mapping range is a
delayed allocated only (not unwritten) one, and making
ext4_map_blocks() can distinguish it, no longer mixing it with holes.
Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240127015825.1608160-6-yi.zhang@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| -rw-r--r-- | fs/ext4/ext4.h | 4 | ||||
| -rw-r--r-- | fs/ext4/extents.c | 7 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 2 |
3 files changed, 10 insertions, 3 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 786b6857ab47..023571f8dd1b 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -252,8 +252,10 @@ struct ext4_allocation_request { #define EXT4_MAP_MAPPED BIT(BH_Mapped) #define EXT4_MAP_UNWRITTEN BIT(BH_Unwritten) #define EXT4_MAP_BOUNDARY BIT(BH_Boundary) +#define EXT4_MAP_DELAYED BIT(BH_Delay) #define EXT4_MAP_FLAGS (EXT4_MAP_NEW | EXT4_MAP_MAPPED |\ - EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY) + EXT4_MAP_UNWRITTEN | EXT4_MAP_BOUNDARY |\ + EXT4_MAP_DELAYED) struct ext4_map_blocks { ext4_fsblk_t m_pblk; diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index c5b54fb9eb8b..7669d154c05e 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -4076,8 +4076,11 @@ again: /* * The delalloc extent containing lblk, it must have been * added after ext4_map_blocks() checked the extent status - * tree, adjust the length to the delalloc extent's after - * lblk. + * tree so we are not holding i_rwsem and delalloc info is + * only stabilized by i_data_sem we are going to release + * soon. Don't modify the extent status tree and report + * extent as a hole, just adjust the length to the delalloc + * extent's after lblk. */ len = es.es_lblk + es.es_len - lblk; return len; diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index af205b416794..60f0d2dc1c37 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -515,6 +515,8 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode, map->m_len = retval; } else if (ext4_es_is_delayed(&es) || ext4_es_is_hole(&es)) { map->m_pblk = 0; + map->m_flags |= ext4_es_is_delayed(&es) ? + EXT4_MAP_DELAYED : 0; retval = es.es_len - (map->m_lblk - es.es_lblk); if (retval > map->m_len) retval = map->m_len; |