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| author | Eric Biggers <ebiggers@google.com> | 2021-07-23 09:59:20 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2021-12-04 19:53:35 +0100 |
| commit | 1517c1a7a4456f080fabc4ac9853930e4b880d14 (patch) | |
| tree | f20a1b7eb01a9c59411d9770ed5cb05407eb41dc /fs | |
| parent | f2fs: fix the f2fs_file_write_iter tracepoint (diff) | |
| download | linux-1517c1a7a4456f080fabc4ac9853930e4b880d14.tar.xz linux-1517c1a7a4456f080fabc4ac9853930e4b880d14.zip | |
f2fs: implement iomap operations
Implement 'struct iomap_ops' for f2fs, in preparation for making f2fs
use iomap for direct I/O.
Note that this may be used for other things besides direct I/O in the
future; however, for now I've only tested it for direct I/O.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/f2fs/Kconfig | 1 | ||||
| -rw-r--r-- | fs/f2fs/data.c | 56 | ||||
| -rw-r--r-- | fs/f2fs/f2fs.h | 1 |
3 files changed, 58 insertions, 0 deletions
diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig index 7eea3cfd894d..f46a7339d6cf 100644 --- a/fs/f2fs/Kconfig +++ b/fs/f2fs/Kconfig @@ -7,6 +7,7 @@ config F2FS_FS select CRYPTO_CRC32 select F2FS_FS_XATTR if FS_ENCRYPTION select FS_ENCRYPTION_ALGS if FS_ENCRYPTION + select FS_IOMAP select LZ4_COMPRESS if F2FS_FS_LZ4 select LZ4_DECOMPRESS if F2FS_FS_LZ4 select LZ4HC_COMPRESS if F2FS_FS_LZ4HC diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 9c867de1ec29..57e6a6f0daf9 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -21,6 +21,7 @@ #include <linux/cleancache.h> #include <linux/sched/signal.h> #include <linux/fiemap.h> +#include <linux/iomap.h> #include "f2fs.h" #include "node.h" @@ -4237,3 +4238,58 @@ void f2fs_destroy_bio_entry_cache(void) { kmem_cache_destroy(bio_entry_slab); } + +static int f2fs_iomap_begin(struct inode *inode, loff_t offset, loff_t length, + unsigned int flags, struct iomap *iomap, + struct iomap *srcmap) +{ + struct f2fs_map_blocks map = {}; + pgoff_t next_pgofs = 0; + int err; + + map.m_lblk = bytes_to_blks(inode, offset); + map.m_len = bytes_to_blks(inode, offset + length - 1) - map.m_lblk + 1; + map.m_next_pgofs = &next_pgofs; + map.m_seg_type = f2fs_rw_hint_to_seg_type(inode->i_write_hint); + if (flags & IOMAP_WRITE) + map.m_may_create = true; + + err = f2fs_map_blocks(inode, &map, flags & IOMAP_WRITE, + F2FS_GET_BLOCK_DIO); + if (err) + return err; + + iomap->offset = blks_to_bytes(inode, map.m_lblk); + + if (map.m_flags & (F2FS_MAP_MAPPED | F2FS_MAP_UNWRITTEN)) { + iomap->length = blks_to_bytes(inode, map.m_len); + if (map.m_flags & F2FS_MAP_MAPPED) { + iomap->type = IOMAP_MAPPED; + iomap->flags |= IOMAP_F_MERGED; + } else { + iomap->type = IOMAP_UNWRITTEN; + } + if (WARN_ON_ONCE(!__is_valid_data_blkaddr(map.m_pblk))) + return -EINVAL; + + iomap->bdev = map.m_bdev; + iomap->addr = blks_to_bytes(inode, map.m_pblk); + } else { + iomap->length = blks_to_bytes(inode, next_pgofs) - + iomap->offset; + iomap->type = IOMAP_HOLE; + iomap->addr = IOMAP_NULL_ADDR; + } + + if (map.m_flags & F2FS_MAP_NEW) + iomap->flags |= IOMAP_F_NEW; + if ((inode->i_state & I_DIRTY_DATASYNC) || + offset + length > i_size_read(inode)) + iomap->flags |= IOMAP_F_DIRTY; + + return 0; +} + +const struct iomap_ops f2fs_iomap_ops = { + .iomap_begin = f2fs_iomap_begin, +}; diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index d7435fcb9658..8242f47304a5 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -3655,6 +3655,7 @@ int f2fs_init_post_read_processing(void); void f2fs_destroy_post_read_processing(void); int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi); void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi); +extern const struct iomap_ops f2fs_iomap_ops; /* * gc.c |