diff options
| author | Jan Kara <jack@suse.cz> | 2023-01-18 15:18:41 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2023-01-26 16:46:33 +0100 |
| commit | 809425217805c2866a7a3019eeff92312edbd7e8 (patch) | |
| tree | ece33386fc25997a63e70dccfe11581ae16abc21 /fs/udf | |
| parent | b3c03fcef2712eb957a7633806a98d2c84d55468 (diff) | |
| download | linux-809425217805c2866a7a3019eeff92312edbd7e8.tar.gz | |
udf: Add flag to disable block preallocation
In some cases we don't want to create block preallocation when
allocating blocks. Add a flag to udf_map_rq controlling the behavior.
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf')
| -rw-r--r-- | fs/udf/inode.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c index 31088e9051500..1a6627c91bd80 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -322,7 +322,8 @@ int udf_expand_file_adinicb(struct inode *inode) return err; } -#define UDF_MAP_CREATE 0x01 /* Mapping can allocate new blocks */ +#define UDF_MAP_CREATE 0x01 /* Mapping can allocate new blocks */ +#define UDF_MAP_NOPREALLOC 0x02 /* Do not preallocate blocks */ #define UDF_BLK_MAPPED 0x01 /* Block was successfully mapped */ #define UDF_BLK_NEW 0x02 /* Block was freshly allocated */ @@ -381,6 +382,14 @@ static int udf_get_block(struct inode *inode, sector_t block, .iflags = create ? UDF_MAP_CREATE : 0, }; + /* + * We preallocate blocks only for regular files. It also makes sense + * for directories but there's a problem when to drop the + * preallocation. We might use some delayed work for that but I feel + * it's overengineering for a filesystem like UDF. + */ + if (!S_ISREG(inode->i_mode)) + map.iflags |= UDF_MAP_NOPREALLOC; err = udf_map_block(inode, &map); if (err < 0) return err; @@ -808,11 +817,7 @@ static int inode_getblk(struct inode *inode, struct udf_map_rq *map) * block */ udf_split_extents(inode, &c, offset, newblocknum, laarr, &endnum); - /* We preallocate blocks only for regular files. It also makes sense - * for directories but there's a problem when to drop the - * preallocation. We might use some delayed work for that but I feel - * it's overengineering for a filesystem like UDF. */ - if (S_ISREG(inode->i_mode)) + if (!(map->iflags & UDF_MAP_NOPREALLOC)) udf_prealloc_extents(inode, c, lastblock, laarr, &endnum); /* merge any continuous blocks in laarr */ |