Currently ubifs doesn't support unaligned read offset, thanks to the recent _fs_read() work to handle unaligned read, we only need to implement ubifs_get_blocksize() to take advantage of it.
Now ubifs can do unaligned read without any problem.
Signed-off-by: Qu Wenruo wqu@suse.com --- Unfortunately I can not test ubifs, as enabling UBI would cause compile failure due to missing of <asm/atomic.h> header. --- fs/fs.c | 2 +- fs/ubifs/ubifs.c | 13 ++++++++----- include/ubifs_uboot.h | 1 + 3 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/fs/fs.c b/fs/fs.c index 09625f52e913..61bae1051406 100644 --- a/fs/fs.c +++ b/fs/fs.c @@ -311,7 +311,7 @@ static struct fstype_info fstypes[] = { .exists = ubifs_exists, .size = ubifs_size, .read = ubifs_read, - .get_blocksize = fs_get_blocksize_unsupported, + .get_blocksize = ubifs_get_blocksize, .write = fs_write_unsupported, .uuid = fs_uuid_unsupported, .opendir = fs_opendir_unsupported, diff --git a/fs/ubifs/ubifs.c b/fs/ubifs/ubifs.c index d3026e310168..a8ab556dd376 100644 --- a/fs/ubifs/ubifs.c +++ b/fs/ubifs/ubifs.c @@ -846,11 +846,9 @@ int ubifs_read(const char *filename, void *buf, loff_t offset,
*actread = 0;
- if (offset & (PAGE_SIZE - 1)) { - printf("ubifs: Error offset must be a multiple of %d\n", - PAGE_SIZE); - return -1; - } + /* Higher layer should ensure it always pass page aligned range. */ + assert(IS_ALIGNED(offset, PAGE_SIZE)); + assert(IS_ALIGNED(size, PAGE_SIZE));
c->ubi = ubi_open_volume(c->vi.ubi_num, c->vi.vol_id, UBI_READONLY); /* ubifs_findfile will resolve symlinks, so we know that we get @@ -920,6 +918,11 @@ out: return err; }
+int ubifs_get_blocksize(const char *filename) +{ + return PAGE_SIZE; +} + void ubifs_close(void) { } diff --git a/include/ubifs_uboot.h b/include/ubifs_uboot.h index b025779d59ff..bcd21715314a 100644 --- a/include/ubifs_uboot.h +++ b/include/ubifs_uboot.h @@ -29,6 +29,7 @@ int ubifs_exists(const char *filename); int ubifs_size(const char *filename, loff_t *size); int ubifs_read(const char *filename, void *buf, loff_t offset, loff_t size, loff_t *actread); +int ubifs_get_blocksize(const char *filename); void ubifs_close(void);
#endif /* __UBIFS_UBOOT_H__ */