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| author | FUJITA Tomonori <tomof@acm.org> | 2007-07-11 08:08:19 +0200 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.localdomain> | 2007-10-12 20:37:53 +0200 |
| commit | 62fe88261b9d865264d857777cf58a0335513151 (patch) | |
| tree | db111392d242cabfddebbee7eae6b6d971eec35e | |
| parent | [SCSI] tgt: add I_T nexus support (diff) | |
| download | linux-62fe88261b9d865264d857777cf58a0335513151.tar.xz linux-62fe88261b9d865264d857777cf58a0335513151.zip | |
[SCSI] srp_transport: add target driver support
This adds minimum target driver support:
- srp_rport_{add,del} calls scsi_tgt_it_nexus_{create,destroy} for
target drivers.
- add a callback to notify target drivers of the nexus operation
results to srp_function_template.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
| -rw-r--r-- | drivers/scsi/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/scsi/scsi_transport_srp.c | 24 | ||||
| -rw-r--r-- | include/scsi/scsi_transport_srp.h | 3 |
3 files changed, 27 insertions, 2 deletions
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 778dc0fb1e4f..8d4057ea27b1 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -291,7 +291,7 @@ source "drivers/scsi/libsas/Kconfig" config SCSI_SRP_ATTRS tristate "SRP Transport Attributes" - depends on SCSI + depends on SCSI && SCSI_TGT help If you wish to export transport-specific information about each attached SRP device to sysfs, say Y. diff --git a/drivers/scsi/scsi_transport_srp.c b/drivers/scsi/scsi_transport_srp.c index 608abd8aef20..8e5b41ca181d 100644 --- a/drivers/scsi/scsi_transport_srp.c +++ b/drivers/scsi/scsi_transport_srp.c @@ -30,6 +30,7 @@ #include <scsi/scsi_host.h> #include <scsi/scsi_transport.h> #include <scsi/scsi_transport_srp.h> +#include <scsi/scsi_tgt.h> struct srp_host_attrs { atomic_t next_port_id; @@ -221,6 +222,17 @@ struct srp_rport *srp_rport_add(struct Scsi_Host *shost, return ERR_PTR(ret); } + if (ids->roles == SRP_RPORT_ROLE_INITIATOR) { + ret = scsi_tgt_it_nexus_create(shost, (unsigned long)rport, + rport->port_id); + if (ret) { + device_del(&rport->dev); + transport_destroy_device(&rport->dev); + put_device(&rport->dev); + return ERR_PTR(ret); + } + } + transport_add_device(&rport->dev); transport_configure_device(&rport->dev); @@ -238,6 +250,10 @@ void srp_rport_del(struct srp_rport *rport) { struct device *dev = &rport->dev; + if (rport->roles == SRP_RPORT_ROLE_INITIATOR) + scsi_tgt_it_nexus_destroy(dev_to_shost(dev->parent), + (unsigned long)rport); + transport_remove_device(dev); device_del(dev); transport_destroy_device(dev); @@ -264,6 +280,12 @@ void srp_remove_host(struct Scsi_Host *shost) } EXPORT_SYMBOL_GPL(srp_remove_host); +static int srp_it_nexus_response(struct Scsi_Host *shost, u64 id, int result) +{ + struct srp_internal *i = to_srp_internal(shost->transportt); + return i->f->it_nexus_response(shost, id, result); +} + /** * srp_attach_transport -- instantiate SRP transport template * @ft: SRP transport class function template @@ -278,6 +300,8 @@ srp_attach_transport(struct srp_function_template *ft) if (!i) return NULL; + i->t.it_nexus_response = srp_it_nexus_response; + i->t.host_size = sizeof(struct srp_host_attrs); i->t.host_attrs.ac.attrs = &i->host_attrs[0]; i->t.host_attrs.ac.class = &srp_host_class.class; diff --git a/include/scsi/scsi_transport_srp.h b/include/scsi/scsi_transport_srp.h index 08b4a28a77b8..a705dbc016b3 100644 --- a/include/scsi/scsi_transport_srp.h +++ b/include/scsi/scsi_transport_srp.h @@ -21,7 +21,8 @@ struct srp_rport { }; struct srp_function_template { - /* later */ + /* for target drivers */ + int (* it_nexus_response)(struct Scsi_Host *, u64, int); }; extern struct scsi_transport_template * |