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vhost/scsi: Convert to target_alloc_session usage 

This patch converts vhost/scsi pre-allocation of vhost_scsi_cmd
descriptors to use the new alloc_session callback().

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger 2016-01-09 05:47:55 -08:00
parent fb444abe61
commit 65ea789869
1 changed files with 45 additions and 62 deletions
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107
drivers/vhost/scsi.c
View File

@ -1664,8 +1664,7 @@ static void vhost_scsi_port_unlink(struct se_portal_group *se_tpg,
mutex_unlock(&vhost_scsi_mutex);
}
static void vhost_scsi_free_cmd_map_res(struct vhost_scsi_nexus *nexus,
struct se_session *se_sess)
static void vhost_scsi_free_cmd_map_res(struct se_session *se_sess)
{
struct vhost_scsi_cmd *tv_cmd;
unsigned int i;
@ -1721,14 +1720,47 @@ static struct configfs_attribute *vhost_scsi_tpg_attrib_attrs[] = {
NULL,
};
static int vhost_scsi_nexus_cb(struct se_portal_group *se_tpg,
struct se_session *se_sess, void *p)
{
struct vhost_scsi_cmd *tv_cmd;
unsigned int i;
for (i = 0; i < VHOST_SCSI_DEFAULT_TAGS; i++) {
tv_cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[i];
tv_cmd->tvc_sgl = kzalloc(sizeof(struct scatterlist) *
VHOST_SCSI_PREALLOC_SGLS, GFP_KERNEL);
if (!tv_cmd->tvc_sgl) {
pr_err("Unable to allocate tv_cmd->tvc_sgl\n");
goto out;
}
tv_cmd->tvc_upages = kzalloc(sizeof(struct page *) *
VHOST_SCSI_PREALLOC_UPAGES, GFP_KERNEL);
if (!tv_cmd->tvc_upages) {
pr_err("Unable to allocate tv_cmd->tvc_upages\n");
goto out;
}
tv_cmd->tvc_prot_sgl = kzalloc(sizeof(struct scatterlist) *
VHOST_SCSI_PREALLOC_PROT_SGLS, GFP_KERNEL);
if (!tv_cmd->tvc_prot_sgl) {
pr_err("Unable to allocate tv_cmd->tvc_prot_sgl\n");
goto out;
}
}
return 0;
out:
vhost_scsi_free_cmd_map_res(se_sess);
return -ENOMEM;
}
static int vhost_scsi_make_nexus(struct vhost_scsi_tpg *tpg,
const char *name)
{
struct se_portal_group *se_tpg;
struct se_session *se_sess;
struct vhost_scsi_nexus *tv_nexus;
struct vhost_scsi_cmd *tv_cmd;
unsigned int i;
mutex_lock(&tpg->tv_tpg_mutex);
if (tpg->tpg_nexus) {
@ -1745,74 +1777,25 @@ static int vhost_scsi_make_nexus(struct vhost_scsi_tpg *tpg,
return -ENOMEM;
}
/*
* Initialize the struct se_session pointer and setup tagpool
* for struct vhost_scsi_cmd descriptors
* Since we are running in 'demo mode' this call with generate a
* struct se_node_acl for the vhost_scsi struct se_portal_group with
* the SCSI Initiator port name of the passed configfs group 'name'.
*/
tv_nexus->tvn_se_sess = transport_init_session_tags(
tv_nexus->tvn_se_sess = target_alloc_session(&tpg->se_tpg,
VHOST_SCSI_DEFAULT_TAGS,
sizeof(struct vhost_scsi_cmd),
TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS);
TARGET_PROT_DIN_PASS | TARGET_PROT_DOUT_PASS,
(unsigned char *)name, tv_nexus,
vhost_scsi_nexus_cb);
if (IS_ERR(tv_nexus->tvn_se_sess)) {
mutex_unlock(&tpg->tv_tpg_mutex);
kfree(tv_nexus);
return -ENOMEM;
}
se_sess = tv_nexus->tvn_se_sess;
for (i = 0; i < VHOST_SCSI_DEFAULT_TAGS; i++) {
tv_cmd = &((struct vhost_scsi_cmd *)se_sess->sess_cmd_map)[i];
tv_cmd->tvc_sgl = kzalloc(sizeof(struct scatterlist) *
VHOST_SCSI_PREALLOC_SGLS, GFP_KERNEL);
if (!tv_cmd->tvc_sgl) {
mutex_unlock(&tpg->tv_tpg_mutex);
pr_err("Unable to allocate tv_cmd->tvc_sgl\n");
goto out;
}
tv_cmd->tvc_upages = kzalloc(sizeof(struct page *) *
VHOST_SCSI_PREALLOC_UPAGES, GFP_KERNEL);
if (!tv_cmd->tvc_upages) {
mutex_unlock(&tpg->tv_tpg_mutex);
pr_err("Unable to allocate tv_cmd->tvc_upages\n");
goto out;
}
tv_cmd->tvc_prot_sgl = kzalloc(sizeof(struct scatterlist) *
VHOST_SCSI_PREALLOC_PROT_SGLS, GFP_KERNEL);
if (!tv_cmd->tvc_prot_sgl) {
mutex_unlock(&tpg->tv_tpg_mutex);
pr_err("Unable to allocate tv_cmd->tvc_prot_sgl\n");
goto out;
}
}
/*
* Since we are running in 'demo mode' this call with generate a
* struct se_node_acl for the vhost_scsi struct se_portal_group with
* the SCSI Initiator port name of the passed configfs group 'name'.
*/
tv_nexus->tvn_se_sess->se_node_acl = core_tpg_check_initiator_node_acl(
se_tpg, (unsigned char *)name);
if (!tv_nexus->tvn_se_sess->se_node_acl) {
mutex_unlock(&tpg->tv_tpg_mutex);
pr_debug("core_tpg_check_initiator_node_acl() failed"
" for %s\n", name);
goto out;
}
/*
* Now register the TCM vhost virtual I_T Nexus as active.
*/
transport_register_session(se_tpg, tv_nexus->tvn_se_sess->se_node_acl,
tv_nexus->tvn_se_sess, tv_nexus);
tpg->tpg_nexus = tv_nexus;
mutex_unlock(&tpg->tv_tpg_mutex);
return 0;
out:
vhost_scsi_free_cmd_map_res(tv_nexus, se_sess);
transport_free_session(se_sess);
kfree(tv_nexus);
return -ENOMEM;
}
static int vhost_scsi_drop_nexus(struct vhost_scsi_tpg *tpg)
@ -1853,7 +1836,7 @@ static int vhost_scsi_drop_nexus(struct vhost_scsi_tpg *tpg)
" %s Initiator Port: %s\n", vhost_scsi_dump_proto_id(tpg->tport),
tv_nexus->tvn_se_sess->se_node_acl->initiatorname);
vhost_scsi_free_cmd_map_res(tv_nexus, se_sess);
vhost_scsi_free_cmd_map_res(se_sess);
/*
* Release the SCSI I_T Nexus to the emulated vhost Target Port
*/