From: Mike Christie <[email protected]> Add support for userspace ceph DECODE_START.
Signed-off-by: Mike Christie <[email protected]> --- include/linux/ceph/decode.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/include/linux/ceph/decode.h b/include/linux/ceph/decode.h index 96ec43d..4f551b8 100644 --- a/include/linux/ceph/decode.h +++ b/include/linux/ceph/decode.h @@ -271,6 +271,29 @@ fail: return -ERANGE; } +/** + * ceph_start_decoding - start a decoding block + * @p: buffer to decode + * @end: end of buffer + * @curr_ver: current version of the encoding that the code supports/encode + * @len: buffer to return len of data in buffer + */ +static inline int ceph_start_decoding(void **p, void *end, u8 curr_ver, + u32 *len) +{ + u8 struct_ver, struct_compat; + + ceph_decode_8_safe(p, end, struct_ver, fail); + ceph_decode_8_safe(p, end, struct_compat, fail); + + if (curr_ver < struct_compat) + return -EINVAL; + + ceph_decode_32_safe(p, end, *len, fail); + return 0; +fail: + return -ERANGE; +} #define ceph_encode_need(p, end, n, bad) \ do { \ -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
