X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=drivers%2Fscsi%2Fscsi_tgt_lib.c;h=10303272ba4573082f942a4ec8e9cd7e4d0a9e95;hb=8d72c796c9d966b0efc26092dae7005c345b3efa;hp=c05dff95bd953afd3c62c1d879f1c4edba650282;hpb=e8f8248cbadcd8cb1b737fc57a01bccca4fb7aec;p=safe%2Fjmp%2Flinux-2.6 diff --git a/drivers/scsi/scsi_tgt_lib.c b/drivers/scsi/scsi_tgt_lib.c index c05dff9..1030327 100644 --- a/drivers/scsi/scsi_tgt_lib.c +++ b/drivers/scsi/scsi_tgt_lib.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #include "scsi_tgt_priv.h" @@ -46,6 +47,7 @@ struct scsi_tgt_cmd { struct list_head hash_list; struct request *rq; + u64 itn_id; u64 tag; }; @@ -101,11 +103,12 @@ struct scsi_cmnd *scsi_host_get_command(struct Scsi_Host *shost, if (!cmd) goto release_rq; - memset(cmd, 0, sizeof(*cmd)); cmd->sc_data_direction = data_dir; cmd->jiffies_at_alloc = jiffies; cmd->request = rq; + cmd->cmnd = rq->cmd; + rq->special = cmd; rq->cmd_type = REQ_TYPE_SPECIAL; rq->cmd_flags |= REQ_TYPE_BLOCK_PC; @@ -178,19 +181,20 @@ static void scsi_tgt_cmd_destroy(struct work_struct *work) container_of(work, struct scsi_tgt_cmd, work); struct scsi_cmnd *cmd = tcmd->rq->special; - dprintk("cmd %p %d %lu\n", cmd, cmd->sc_data_direction, + dprintk("cmd %p %d %u\n", cmd, cmd->sc_data_direction, rq_data_dir(cmd->request)); scsi_unmap_user_pages(tcmd); scsi_host_put_command(scsi_tgt_cmd_to_host(cmd), cmd); } static void init_scsi_tgt_cmd(struct request *rq, struct scsi_tgt_cmd *tcmd, - u64 tag) + u64 itn_id, u64 tag) { struct scsi_tgt_queuedata *qdata = rq->q->queuedata; unsigned long flags; struct list_head *head; + tcmd->itn_id = itn_id; tcmd->tag = tag; tcmd->bio = NULL; INIT_WORK(&tcmd->work, scsi_tgt_cmd_destroy); @@ -234,7 +238,7 @@ int scsi_tgt_alloc_queue(struct Scsi_Host *shost) * command as is recvd to userspace. uspace can then make * sure we do not overload the HBA */ - q->nr_requests = shost->hostt->can_queue; + q->nr_requests = shost->can_queue; /* * We currently only support software LLDs so this does * not matter for now. Do we need this for the cards we support? @@ -301,14 +305,14 @@ EXPORT_SYMBOL_GPL(scsi_tgt_cmd_to_host); * @scsilun: scsi lun * @tag: unique value to identify this command for tmf */ -int scsi_tgt_queue_command(struct scsi_cmnd *cmd, struct scsi_lun *scsilun, - u64 tag) +int scsi_tgt_queue_command(struct scsi_cmnd *cmd, u64 itn_id, + struct scsi_lun *scsilun, u64 tag) { struct scsi_tgt_cmd *tcmd = cmd->request->end_io_data; int err; - init_scsi_tgt_cmd(cmd->request, tcmd, tag); - err = scsi_tgt_uspace_send_cmd(cmd, scsilun, tag); + init_scsi_tgt_cmd(cmd->request, tcmd, itn_id, tag); + err = scsi_tgt_uspace_send_cmd(cmd, itn_id, scsilun, tag); if (err) cmd_hashlist_del(cmd); @@ -317,19 +321,18 @@ int scsi_tgt_queue_command(struct scsi_cmnd *cmd, struct scsi_lun *scsilun, EXPORT_SYMBOL_GPL(scsi_tgt_queue_command); /* - * This is run from a interrpt handler normally and the unmap + * This is run from a interrupt handler normally and the unmap * needs process context so we must queue */ static void scsi_tgt_cmd_done(struct scsi_cmnd *cmd) { struct scsi_tgt_cmd *tcmd = cmd->request->end_io_data; - dprintk("cmd %p %lu\n", cmd, rq_data_dir(cmd->request)); + dprintk("cmd %p %u\n", cmd, rq_data_dir(cmd->request)); - scsi_tgt_uspace_send_status(cmd, tcmd->tag); + scsi_tgt_uspace_send_status(cmd, tcmd->itn_id, tcmd->tag); - if (cmd->request_buffer) - scsi_free_sgtable(cmd->request_buffer, cmd->sglist_len); + scsi_release_buffers(cmd); queue_work(scsi_tgtd, &tcmd->work); } @@ -339,7 +342,7 @@ static int scsi_tgt_transfer_response(struct scsi_cmnd *cmd) struct Scsi_Host *shost = scsi_tgt_cmd_to_host(cmd); int err; - dprintk("cmd %p %lu\n", cmd, rq_data_dir(cmd->request)); + dprintk("cmd %p %u\n", cmd, rq_data_dir(cmd->request)); err = shost->hostt->transfer_response(cmd, scsi_tgt_cmd_done); switch (err) { @@ -350,30 +353,6 @@ static int scsi_tgt_transfer_response(struct scsi_cmnd *cmd) return 0; } -static int scsi_tgt_init_cmd(struct scsi_cmnd *cmd, gfp_t gfp_mask) -{ - struct request *rq = cmd->request; - int count; - - cmd->use_sg = rq->nr_phys_segments; - cmd->request_buffer = scsi_alloc_sgtable(cmd, gfp_mask); - if (!cmd->request_buffer) - return -ENOMEM; - - cmd->request_bufflen = rq->data_len; - - dprintk("cmd %p cnt %d %lu\n", cmd, cmd->use_sg, rq_data_dir(rq)); - count = blk_rq_map_sg(rq->q, rq, cmd->request_buffer); - if (likely(count <= cmd->use_sg)) { - cmd->use_sg = count; - return 0; - } - - eprintk("cmd %p cnt %d\n", cmd, cmd->use_sg); - scsi_free_sgtable(cmd->request_buffer, cmd->sglist_len); - return -EINVAL; -} - /* TODO: test this crap and replace bio_map_user with new interface maybe */ static int scsi_map_user_pages(struct scsi_tgt_cmd *tcmd, struct scsi_cmnd *cmd, unsigned long uaddr, unsigned int len, int rw) @@ -383,7 +362,7 @@ static int scsi_map_user_pages(struct scsi_tgt_cmd *tcmd, struct scsi_cmnd *cmd, int err; dprintk("%lx %u\n", uaddr, len); - err = blk_rq_map_user(q, rq, (void *)uaddr, len); + err = blk_rq_map_user(q, rq, NULL, (void *)uaddr, len, GFP_KERNEL); if (err) { /* * TODO: need to fixup sg_tablesize, max_segment_size, @@ -399,9 +378,16 @@ static int scsi_map_user_pages(struct scsi_tgt_cmd *tcmd, struct scsi_cmnd *cmd, } tcmd->bio = rq->bio; - err = scsi_tgt_init_cmd(cmd, GFP_KERNEL); - if (err) + err = scsi_init_io(cmd, GFP_KERNEL); + if (err) { + scsi_release_buffers(cmd); goto unmap_rq; + } + /* + * we use REQ_TYPE_BLOCK_PC so scsi_init_io doesn't set the + * length for us. + */ + cmd->sdb.length = blk_rq_bytes(rq); return 0; @@ -459,17 +445,7 @@ static struct request *tgt_cmd_hash_lookup(struct request_queue *q, u64 tag) return rq; } -static void scsi_tgt_build_sense(unsigned char *sense_buffer, unsigned char key, - unsigned char asc, unsigned char asq) -{ - sense_buffer[0] = 0x70; - sense_buffer[2] = key; - sense_buffer[7] = 0xa; - sense_buffer[12] = asc; - sense_buffer[13] = asq; -} - -int scsi_tgt_kspace_exec(int host_no, int result, u64 tag, +int scsi_tgt_kspace_exec(int host_no, u64 itn_id, int result, u64 tag, unsigned long uaddr, u32 len, unsigned long sense_uaddr, u32 sense_len, u8 rw) { @@ -484,7 +460,7 @@ int scsi_tgt_kspace_exec(int host_no, int result, u64 tag, /* TODO: replace with a O(1) alg */ shost = scsi_host_lookup(host_no); - if (IS_ERR(shost)) { + if (!shost) { printk(KERN_ERR "Could not find host no %d\n", host_no); return -EINVAL; } @@ -503,8 +479,8 @@ int scsi_tgt_kspace_exec(int host_no, int result, u64 tag, } cmd = rq->special; - dprintk("cmd %p scb %x result %d len %d bufflen %u %lu %x\n", - cmd, cmd->cmnd[0], result, len, cmd->request_bufflen, + dprintk("cmd %p scb %x result %d len %d bufflen %u %u %x\n", + cmd, cmd->cmnd[0], result, len, scsi_bufflen(cmd), rq_data_dir(rq), cmd->cmnd[0]); if (result == TASK_ABORTED) { @@ -528,12 +504,21 @@ int scsi_tgt_kspace_exec(int host_no, int result, u64 tag, * user-space daemon bugs or OOM * TODO: we can do better for OOM. */ + struct scsi_tgt_queuedata *qdata; + struct list_head *head; + unsigned long flags; + eprintk("cmd %p ret %d uaddr %lx len %d rw %d\n", cmd, err, uaddr, len, rw); - cmd->result = SAM_STAT_CHECK_CONDITION; - memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); - scsi_tgt_build_sense(cmd->sense_buffer, - HARDWARE_ERROR, 0, 0); + + qdata = shost->uspace_req_q->queuedata; + head = &qdata->cmd_hash[cmd_hashfn(tcmd->tag)]; + + spin_lock_irqsave(&qdata->cmd_hash_lock, flags); + list_add(&tcmd->hash_list, head); + spin_unlock_irqrestore(&qdata->cmd_hash_lock, flags); + + goto done; } } err = scsi_tgt_transfer_response(cmd); @@ -542,21 +527,22 @@ done: return err; } -int scsi_tgt_tsk_mgmt_request(struct Scsi_Host *shost, int function, u64 tag, - struct scsi_lun *scsilun, void *data) +int scsi_tgt_tsk_mgmt_request(struct Scsi_Host *shost, u64 itn_id, + int function, u64 tag, struct scsi_lun *scsilun, + void *data) { int err; /* TODO: need to retry if this fails. */ - err = scsi_tgt_uspace_send_tsk_mgmt(shost->host_no, function, - tag, scsilun, data); + err = scsi_tgt_uspace_send_tsk_mgmt(shost->host_no, itn_id, + function, tag, scsilun, data); if (err < 0) eprintk("The task management request lost!\n"); return err; } EXPORT_SYMBOL_GPL(scsi_tgt_tsk_mgmt_request); -int scsi_tgt_kspace_tsk_mgmt(int host_no, u64 mid, int result) +int scsi_tgt_kspace_tsk_mgmt(int host_no, u64 itn_id, u64 mid, int result) { struct Scsi_Host *shost; int err = -EINVAL; @@ -564,7 +550,60 @@ int scsi_tgt_kspace_tsk_mgmt(int host_no, u64 mid, int result) dprintk("%d %d %llx\n", host_no, result, (unsigned long long) mid); shost = scsi_host_lookup(host_no); - if (IS_ERR(shost)) { + if (!shost) { + printk(KERN_ERR "Could not find host no %d\n", host_no); + return err; + } + + if (!shost->uspace_req_q) { + printk(KERN_ERR "Not target scsi host %d\n", host_no); + goto done; + } + + err = shost->transportt->tsk_mgmt_response(shost, itn_id, mid, result); +done: + scsi_host_put(shost); + return err; +} + +int scsi_tgt_it_nexus_create(struct Scsi_Host *shost, u64 itn_id, + char *initiator) +{ + int err; + + /* TODO: need to retry if this fails. */ + err = scsi_tgt_uspace_send_it_nexus_request(shost->host_no, itn_id, 0, + initiator); + if (err < 0) + eprintk("The i_t_neuxs request lost, %d %llx!\n", + shost->host_no, (unsigned long long)itn_id); + return err; +} +EXPORT_SYMBOL_GPL(scsi_tgt_it_nexus_create); + +int scsi_tgt_it_nexus_destroy(struct Scsi_Host *shost, u64 itn_id) +{ + int err; + + /* TODO: need to retry if this fails. */ + err = scsi_tgt_uspace_send_it_nexus_request(shost->host_no, + itn_id, 1, NULL); + if (err < 0) + eprintk("The i_t_neuxs request lost, %d %llx!\n", + shost->host_no, (unsigned long long)itn_id); + return err; +} +EXPORT_SYMBOL_GPL(scsi_tgt_it_nexus_destroy); + +int scsi_tgt_kspace_it_nexus_rsp(int host_no, u64 itn_id, int result) +{ + struct Scsi_Host *shost; + int err = -EINVAL; + + dprintk("%d %d%llx\n", host_no, result, (unsigned long long)itn_id); + + shost = scsi_host_lookup(host_no); + if (!shost) { printk(KERN_ERR "Could not find host no %d\n", host_no); return err; } @@ -574,7 +613,7 @@ int scsi_tgt_kspace_tsk_mgmt(int host_no, u64 mid, int result) goto done; } - err = shost->hostt->tsk_mgmt_response(mid, result); + err = shost->transportt->it_nexus_response(shost, itn_id, result); done: scsi_host_put(shost); return err; @@ -584,9 +623,7 @@ static int __init scsi_tgt_init(void) { int err; - scsi_tgt_cmd_cache = kmem_cache_create("scsi_tgt_cmd", - sizeof(struct scsi_tgt_cmd), - 0, 0, NULL, NULL); + scsi_tgt_cmd_cache = KMEM_CACHE(scsi_tgt_cmd, 0); if (!scsi_tgt_cmd_cache) return -ENOMEM;