I'm not an expert on erofs, but my quick glance didn't expose any special handling on unaligned range, thus I think the U-boot erofs driver doesn't really support unaligned read range.
This patch will add erofs_get_blocksize() so erofs can benefit from the generic unaligned read support.
Cc: Huang Jianan jnhuang95@gmail.com Cc: linux-erofs@lists.ozlabs.org Signed-off-by: Qu Wenruo wqu@suse.com Reviewed-by: Huang Jianan jnhuang95@gmail.com --- fs/erofs/internal.h | 1 + fs/erofs/super.c | 6 ++++++ fs/fs.c | 2 +- include/erofs.h | 1 + 4 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index 4af7c91560cc..d368a6481bf1 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -83,6 +83,7 @@ struct erofs_sb_info { u16 available_compr_algs; u16 lz4_max_distance; u32 checksum; + u32 blocksize; u16 extra_devices; union { u16 devt_slotoff; /* used for mkfs */ diff --git a/fs/erofs/super.c b/fs/erofs/super.c index 4cca322b9ead..df01d2e719a7 100644 --- a/fs/erofs/super.c +++ b/fs/erofs/super.c @@ -99,7 +99,13 @@ int erofs_read_superblock(void)
sbi.build_time = le64_to_cpu(dsb->build_time); sbi.build_time_nsec = le32_to_cpu(dsb->build_time_nsec); + sbi.blocksize = 1 << blkszbits;
memcpy(&sbi.uuid, dsb->uuid, sizeof(dsb->uuid)); return erofs_init_devices(&sbi, dsb); } + +int erofs_get_blocksize(const char *filename) +{ + return sbi.blocksize; +} diff --git a/fs/fs.c b/fs/fs.c index 2b847d83597b..23cfb1f5025b 100644 --- a/fs/fs.c +++ b/fs/fs.c @@ -375,7 +375,7 @@ static struct fstype_info fstypes[] = { .readdir = erofs_readdir, .ls = fs_ls_generic, .read = erofs_read, - .get_blocksize = fs_get_blocksize_unsupported, + .get_blocksize = erofs_get_blocksize, .size = erofs_size, .close = erofs_close, .closedir = erofs_closedir, diff --git a/include/erofs.h b/include/erofs.h index 1fbe82bf72cb..18bd6807c538 100644 --- a/include/erofs.h +++ b/include/erofs.h @@ -10,6 +10,7 @@ int erofs_probe(struct blk_desc *fs_dev_desc, struct disk_partition *fs_partition); int erofs_read(const char *filename, void *buf, loff_t offset, loff_t len, loff_t *actread); +int erofs_get_blocksize(const char *filename); int erofs_size(const char *filename, loff_t *size); int erofs_exists(const char *filename); void erofs_close(void);