diff options
author | Bart Van Assche <bart.vanassche@sandisk.com> | 2017-05-23 16:48:27 -0700 |
---|---|---|
committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2017-07-06 22:57:59 -0700 |
commit | a85d667e58bddf73be84d1981b41eaac985ed216 (patch) | |
tree | b997450b0dce7048845834d1756a7e12cb19d069 /drivers/target/target_core_pr.c | |
parent | f2b72d6a8eed0eb02e6346886514a27df1efe827 (diff) | |
download | linux-next-a85d667e58bddf73be84d1981b41eaac985ed216.tar.gz |
target: Use {get,put}_unaligned_be*() instead of open coding these functions
Introduce the function get_unaligned_be24(). Use {get,put}_unaligned_be*()
where appropriate. This patch does not change any functionality.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Cc: Andy Grover <agrover@redhat.com>
Cc: David Disseldorp <ddiss@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/target/target_core_pr.c')
-rw-r--r-- | drivers/target/target_core_pr.c | 99 |
1 files changed, 20 insertions, 79 deletions
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index 129ca572673c..9921d4d6bb41 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -1562,10 +1562,7 @@ core_scsi3_decode_spec_i_port( * first extract TransportID Parameter Data Length, and make sure * the value matches up to the SCSI expected data transfer length. */ - tpdl = (buf[24] & 0xff) << 24; - tpdl |= (buf[25] & 0xff) << 16; - tpdl |= (buf[26] & 0xff) << 8; - tpdl |= buf[27] & 0xff; + tpdl = get_unaligned_be32(&buf[24]); if ((tpdl + 28) != cmd->data_length) { pr_err("SPC-3 PR: Illegal tpdl: %u + 28 byte header" @@ -3221,12 +3218,8 @@ core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, goto out_put_pr_reg; } - rtpi = (buf[18] & 0xff) << 8; - rtpi |= buf[19] & 0xff; - tid_len = (buf[20] & 0xff) << 24; - tid_len |= (buf[21] & 0xff) << 16; - tid_len |= (buf[22] & 0xff) << 8; - tid_len |= buf[23] & 0xff; + rtpi = get_unaligned_be16(&buf[18]); + tid_len = get_unaligned_be32(&buf[20]); transport_kunmap_data_sg(cmd); buf = NULL; @@ -3552,16 +3545,6 @@ out_put_pr_reg: return ret; } -static unsigned long long core_scsi3_extract_reservation_key(unsigned char *cdb) -{ - unsigned int __v1, __v2; - - __v1 = (cdb[0] << 24) | (cdb[1] << 16) | (cdb[2] << 8) | cdb[3]; - __v2 = (cdb[4] << 24) | (cdb[5] << 16) | (cdb[6] << 8) | cdb[7]; - - return ((unsigned long long)__v2) | (unsigned long long)__v1 << 32; -} - /* * See spc4r17 section 6.14 Table 170 */ @@ -3619,8 +3602,8 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd) /* * From PERSISTENT_RESERVE_OUT parameter list (payload) */ - res_key = core_scsi3_extract_reservation_key(&buf[0]); - sa_res_key = core_scsi3_extract_reservation_key(&buf[8]); + res_key = get_unaligned_be64(&buf[0]); + sa_res_key = get_unaligned_be64(&buf[8]); /* * REGISTER_AND_MOVE uses a different SA parameter list containing * SCSI TransportIDs. @@ -3734,10 +3717,7 @@ core_scsi3_pri_read_keys(struct se_cmd *cmd) if (!buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); - buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); - buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); - buf[3] = (dev->t10_pr.pr_generation & 0xff); + put_unaligned_be32(dev->t10_pr.pr_generation, buf); spin_lock(&dev->t10_pr.registration_lock); list_for_each_entry(pr_reg, &dev->t10_pr.registration_list, @@ -3749,23 +3729,13 @@ core_scsi3_pri_read_keys(struct se_cmd *cmd) if ((add_len + 8) > (cmd->data_length - 8)) break; - buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); - buf[off++] = (pr_reg->pr_res_key & 0xff); - + put_unaligned_be64(pr_reg->pr_res_key, &buf[off]); + off += 8; add_len += 8; } spin_unlock(&dev->t10_pr.registration_lock); - buf[4] = ((add_len >> 24) & 0xff); - buf[5] = ((add_len >> 16) & 0xff); - buf[6] = ((add_len >> 8) & 0xff); - buf[7] = (add_len & 0xff); + put_unaligned_be32(add_len, &buf[4]); transport_kunmap_data_sg(cmd); @@ -3796,10 +3766,7 @@ core_scsi3_pri_read_reservation(struct se_cmd *cmd) if (!buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); - buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); - buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); - buf[3] = (dev->t10_pr.pr_generation & 0xff); + put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]); spin_lock(&dev->dev_reservation_lock); pr_reg = dev->dev_pr_res_holder; @@ -3807,10 +3774,7 @@ core_scsi3_pri_read_reservation(struct se_cmd *cmd) /* * Set the hardcoded Additional Length */ - buf[4] = ((add_len >> 24) & 0xff); - buf[5] = ((add_len >> 16) & 0xff); - buf[6] = ((add_len >> 8) & 0xff); - buf[7] = (add_len & 0xff); + put_unaligned_be32(add_len, &buf[4]); if (cmd->data_length < 22) goto err; @@ -3837,14 +3801,7 @@ core_scsi3_pri_read_reservation(struct se_cmd *cmd) else pr_res_key = pr_reg->pr_res_key; - buf[8] = ((pr_res_key >> 56) & 0xff); - buf[9] = ((pr_res_key >> 48) & 0xff); - buf[10] = ((pr_res_key >> 40) & 0xff); - buf[11] = ((pr_res_key >> 32) & 0xff); - buf[12] = ((pr_res_key >> 24) & 0xff); - buf[13] = ((pr_res_key >> 16) & 0xff); - buf[14] = ((pr_res_key >> 8) & 0xff); - buf[15] = (pr_res_key & 0xff); + put_unaligned_be64(pr_res_key, &buf[8]); /* * Set the SCOPE and TYPE */ @@ -3882,8 +3839,7 @@ core_scsi3_pri_report_capabilities(struct se_cmd *cmd) if (!buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - buf[0] = ((add_len >> 8) & 0xff); - buf[1] = (add_len & 0xff); + put_unaligned_be16(add_len, &buf[0]); buf[2] |= 0x10; /* CRH: Compatible Reservation Hanlding bit. */ buf[2] |= 0x08; /* SIP_C: Specify Initiator Ports Capable bit */ buf[2] |= 0x04; /* ATP_C: All Target Ports Capable bit */ @@ -3947,10 +3903,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) if (!buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; - buf[0] = ((dev->t10_pr.pr_generation >> 24) & 0xff); - buf[1] = ((dev->t10_pr.pr_generation >> 16) & 0xff); - buf[2] = ((dev->t10_pr.pr_generation >> 8) & 0xff); - buf[3] = (dev->t10_pr.pr_generation & 0xff); + put_unaligned_be32(dev->t10_pr.pr_generation, &buf[0]); spin_lock(&dev->dev_reservation_lock); if (dev->dev_pr_res_holder) { @@ -3992,14 +3945,8 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) /* * Set RESERVATION KEY */ - buf[off++] = ((pr_reg->pr_res_key >> 56) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 48) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 40) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 32) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 24) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 16) & 0xff); - buf[off++] = ((pr_reg->pr_res_key >> 8) & 0xff); - buf[off++] = (pr_reg->pr_res_key & 0xff); + put_unaligned_be64(pr_reg->pr_res_key, &buf[off]); + off += 8; off += 4; /* Skip Over Reserved area */ /* @@ -4041,8 +3988,8 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) if (!pr_reg->pr_reg_all_tg_pt) { u16 sep_rtpi = pr_reg->tg_pt_sep_rtpi; - buf[off++] = ((sep_rtpi >> 8) & 0xff); - buf[off++] = (sep_rtpi & 0xff); + put_unaligned_be16(sep_rtpi, &buf[off]); + off += 2; } else off += 2; /* Skip over RELATIVE TARGET PORT IDENTIFIER */ @@ -4062,10 +4009,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) /* * Set the ADDITIONAL DESCRIPTOR LENGTH */ - buf[off++] = ((desc_len >> 24) & 0xff); - buf[off++] = ((desc_len >> 16) & 0xff); - buf[off++] = ((desc_len >> 8) & 0xff); - buf[off++] = (desc_len & 0xff); + put_unaligned_be32(desc_len, &buf[off]); /* * Size of full desctipor header minus TransportID * containing $FABRIC_MOD specific) initiator device/port @@ -4082,10 +4026,7 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) /* * Set ADDITIONAL_LENGTH */ - buf[4] = ((add_len >> 24) & 0xff); - buf[5] = ((add_len >> 16) & 0xff); - buf[6] = ((add_len >> 8) & 0xff); - buf[7] = (add_len & 0xff); + put_unaligned_be32(add_len, &buf[4]); transport_kunmap_data_sg(cmd); |