diff options
Diffstat (limited to 'drivers/block/rnbd/rnbd-proto.h')
| -rw-r--r-- | drivers/block/rnbd/rnbd-proto.h | 62 |
1 files changed, 31 insertions, 31 deletions
diff --git a/drivers/block/rnbd/rnbd-proto.h b/drivers/block/rnbd/rnbd-proto.h index ea7ac8bca63c..77360c2a6069 100644 --- a/drivers/block/rnbd/rnbd-proto.h +++ b/drivers/block/rnbd/rnbd-proto.h @@ -24,7 +24,7 @@ #define RTRS_PORT 1234 /** - * enum rnbd_msg_types - RNBD message types + * enum rnbd_msg_type - RNBD message types * @RNBD_MSG_SESS_INFO: initial session info from client to server * @RNBD_MSG_SESS_INFO_RSP: initial session info from server to client * @RNBD_MSG_OPEN: open (map) device request @@ -47,10 +47,11 @@ enum rnbd_msg_type { */ struct rnbd_msg_hdr { __le16 type; + /* private: */ __le16 __padding; }; -/** +/* * We allow to map RO many times and RW only once. We allow to map yet another * time RW, if MIGRATION is provided (second RW export can be required for * example for VM migration) @@ -61,6 +62,15 @@ enum rnbd_access_mode { RNBD_ACCESS_MIGRATION, }; +static const __maybe_unused struct { + enum rnbd_access_mode mode; + const char *str; +} rnbd_access_modes[] = { + [RNBD_ACCESS_RO] = {RNBD_ACCESS_RO, "ro"}, + [RNBD_ACCESS_RW] = {RNBD_ACCESS_RW, "rw"}, + [RNBD_ACCESS_MIGRATION] = {RNBD_ACCESS_MIGRATION, "migration"}, +}; + /** * struct rnbd_msg_sess_info - initial session info from client to server * @hdr: message header @@ -69,6 +79,7 @@ enum rnbd_access_mode { struct rnbd_msg_sess_info { struct rnbd_msg_hdr hdr; u8 ver; + /* private: */ u8 reserved[31]; }; @@ -80,6 +91,7 @@ struct rnbd_msg_sess_info { struct rnbd_msg_sess_info_rsp { struct rnbd_msg_hdr hdr; u8 ver; + /* private: */ u8 reserved[31]; }; @@ -88,13 +100,16 @@ struct rnbd_msg_sess_info_rsp { * @hdr: message header * @access_mode: the mode to open remote device, valid values see: * enum rnbd_access_mode - * @device_name: device path on remote side + * @dev_name: device path on remote side */ struct rnbd_msg_open { struct rnbd_msg_hdr hdr; u8 access_mode; + /* private: */ u8 resv1; + /* public: */ s8 dev_name[NAME_MAX]; + /* private: */ u8 reserved[3]; }; @@ -119,7 +134,7 @@ enum rnbd_cache_policy { * @device_id: device_id on server side to identify the device * @nsectors: number of sectors in the usual 512b unit * @max_hw_sectors: max hardware sectors in the usual 512b unit - * @max_write_same_sectors: max sectors for WRITE SAME in the 512b unit + * @max_write_zeroes_sectors: max sectors for WRITE ZEROES in the 512b unit * @max_discard_sectors: max. sectors that can be discarded at once in 512b * unit. * @discard_granularity: size of the internal discard allocation unit in bytes @@ -136,7 +151,7 @@ struct rnbd_msg_open_rsp { __le32 device_id; __le64 nsectors; __le32 max_hw_sectors; - __le32 max_write_same_sectors; + __le32 max_write_zeroes_sectors; __le32 max_discard_sectors; __le32 discard_granularity; __le32 discard_alignment; @@ -146,6 +161,7 @@ struct rnbd_msg_open_rsp { __le16 secure_discard; u8 obsolete_rotational; u8 cache_policy; + /* private: */ u8 reserved[10]; }; @@ -177,31 +193,24 @@ struct rnbd_msg_io { * @RNBD_OP_FLUSH: flush the volatile write cache * @RNBD_OP_DISCARD: discard sectors * @RNBD_OP_SECURE_ERASE: securely erase sectors - * @RNBD_OP_WRITE_SAME: write the same sectors many times - + * @RNBD_OP_WRITE_ZEROES: write zeroes sectors + * * @RNBD_F_SYNC: request is sync (sync write or read) * @RNBD_F_FUA: forced unit access */ enum rnbd_io_flags { /* Operations */ - RNBD_OP_READ = 0, RNBD_OP_WRITE = 1, RNBD_OP_FLUSH = 2, RNBD_OP_DISCARD = 3, RNBD_OP_SECURE_ERASE = 4, - RNBD_OP_WRITE_SAME = 5, - - RNBD_OP_LAST, + RNBD_OP_WRITE_ZEROES = 5, /* Flags */ - RNBD_F_SYNC = 1<<(RNBD_OP_BITS + 0), RNBD_F_FUA = 1<<(RNBD_OP_BITS + 1), - - RNBD_F_ALL = (RNBD_F_SYNC | RNBD_F_FUA) - }; static inline u32 rnbd_op(u32 flags) @@ -214,21 +223,6 @@ static inline u32 rnbd_flags(u32 flags) return flags & ~RNBD_OP_MASK; } -static inline bool rnbd_flags_supported(u32 flags) -{ - u32 op; - - op = rnbd_op(flags); - flags = rnbd_flags(flags); - - if (op >= RNBD_OP_LAST) - return false; - if (flags & ~RNBD_F_ALL) - return false; - - return true; -} - static inline blk_opf_t rnbd_to_bio_flags(u32 rnbd_opf) { blk_opf_t bio_opf; @@ -241,7 +235,7 @@ static inline blk_opf_t rnbd_to_bio_flags(u32 rnbd_opf) bio_opf = REQ_OP_WRITE; break; case RNBD_OP_FLUSH: - bio_opf = REQ_OP_FLUSH | REQ_PREFLUSH; + bio_opf = REQ_OP_WRITE | REQ_PREFLUSH; break; case RNBD_OP_DISCARD: bio_opf = REQ_OP_DISCARD; @@ -249,6 +243,9 @@ static inline blk_opf_t rnbd_to_bio_flags(u32 rnbd_opf) case RNBD_OP_SECURE_ERASE: bio_opf = REQ_OP_SECURE_ERASE; break; + case RNBD_OP_WRITE_ZEROES: + bio_opf = REQ_OP_WRITE_ZEROES; + break; default: WARN(1, "Unknown RNBD type: %d (flags %d)\n", rnbd_op(rnbd_opf), rnbd_opf); @@ -281,6 +278,9 @@ static inline u32 rq_to_rnbd_flags(struct request *rq) case REQ_OP_SECURE_ERASE: rnbd_opf = RNBD_OP_SECURE_ERASE; break; + case REQ_OP_WRITE_ZEROES: + rnbd_opf = RNBD_OP_WRITE_ZEROES; + break; case REQ_OP_FLUSH: rnbd_opf = RNBD_OP_FLUSH; break; |