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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2007-07-16 02:52:16 -0400
committerJens Axboe <jens.axboe@oracle.com>2007-07-16 02:52:47 -0400
commit15d10b611fa94b52f004a08a1d4cf7b39de3cba3 (patch)
tree39b1e114689b71d37677e9733428b355d52d4e44 /block
parent2c9ecdf40af0554ee9a2b1cbbbbdbc77f90a40e1 (diff)
bsg: add SCSI transport-level request support
This enables bsg to handle SCSI transport-level request like SAS management protocol (SMP). - add BSG_SUB_PROTOCOL_{SCSI_CMD, SCSI_TMF, SCSI_TRANSPORT} definitions. - SCSI transport-level requests skip blk_verify_command(). Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/bsg.c27
1 files changed, 21 insertions, 6 deletions
diff --git a/block/bsg.c b/block/bsg.c
index 13ecc951a4c0..461c9f56f3ee 100644
--- a/block/bsg.c
+++ b/block/bsg.c
@@ -208,7 +208,11 @@ static int blk_fill_sgv4_hdr_rq(request_queue_t *q, struct request *rq,
208 if (copy_from_user(rq->cmd, (void *)(unsigned long)hdr->request, 208 if (copy_from_user(rq->cmd, (void *)(unsigned long)hdr->request,
209 hdr->request_len)) 209 hdr->request_len))
210 return -EFAULT; 210 return -EFAULT;
211 if (blk_verify_command(rq->cmd, has_write_perm)) 211
212 if (hdr->subprotocol == BSG_SUB_PROTOCOL_SCSI_CMD) {
213 if (blk_verify_command(rq->cmd, has_write_perm))
214 return -EPERM;
215 } else if (!capable(CAP_SYS_RAWIO))
212 return -EPERM; 216 return -EPERM;
213 217
214 /* 218 /*
@@ -232,6 +236,8 @@ static int blk_fill_sgv4_hdr_rq(request_queue_t *q, struct request *rq,
232static int 236static int
233bsg_validate_sgv4_hdr(request_queue_t *q, struct sg_io_v4 *hdr, int *rw) 237bsg_validate_sgv4_hdr(request_queue_t *q, struct sg_io_v4 *hdr, int *rw)
234{ 238{
239 int ret = 0;
240
235 if (hdr->guard != 'Q') 241 if (hdr->guard != 'Q')
236 return -EINVAL; 242 return -EINVAL;
237 if (hdr->request_len > BLK_MAX_CDB) 243 if (hdr->request_len > BLK_MAX_CDB)
@@ -240,13 +246,22 @@ bsg_validate_sgv4_hdr(request_queue_t *q, struct sg_io_v4 *hdr, int *rw)
240 hdr->din_xfer_len > (q->max_sectors << 9)) 246 hdr->din_xfer_len > (q->max_sectors << 9))
241 return -EIO; 247 return -EIO;
242 248
243 /* not supported currently */ 249 switch (hdr->protocol) {
244 if (hdr->protocol || hdr->subprotocol) 250 case BSG_PROTOCOL_SCSI:
245 return -EINVAL; 251 switch (hdr->subprotocol) {
252 case BSG_SUB_PROTOCOL_SCSI_CMD:
253 case BSG_SUB_PROTOCOL_SCSI_TRANSPORT:
254 break;
255 default:
256 ret = -EINVAL;
257 }
258 break;
259 default:
260 ret = -EINVAL;
261 }
246 262
247 *rw = hdr->dout_xfer_len ? WRITE : READ; 263 *rw = hdr->dout_xfer_len ? WRITE : READ;
248 264 return ret;
249 return 0;
250} 265}
251 266
252/* 267/*