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authorLinus Torvalds <torvalds@linux-foundation.org>2015-07-04 14:13:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-07-04 14:13:43 -0700
commit5c755fe142b421d295e7dd64a9833c12abbfd28e (patch)
tree768b637e9f7b72def5780c99d2368bc462fdaff4 /drivers/target/target_core_pscsi.c
parent6d7c8e1b3a1fae91daaf1bec4df694239c7a430b (diff)
parent2ec1e9e20701f37a06562966dbd37e7dd072fcb8 (diff)
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target updates from Nicholas Bellinger: "It's been a busy development cycle for target-core in a number of different areas. The fabric API usage for se_node_acl allocation is now within target-core code, dropping the external API callers for all fabric drivers tree-wide. There is a new conversion to RCU hlists for se_node_acl and se_portal_group LUN mappings, that turns fast-past LUN lookup into a completely lockless code-path. It also removes the original hard-coded limitation of 256 LUNs per fabric endpoint. The configfs attributes for backends can now be shared between core and driver code, allowing existing drivers to use common code while still allowing flexibility for new backend provided attributes. The highlights include: - Merge sbc_verify_dif_* into common code (sagi) - Remove iscsi-target support for obsolete IFMarker/OFMarker (Christophe Vu-Brugier) - Add bidi support in target/user backend (ilias + vangelis + agover) - Move se_node_acl allocation into target-core code (hch) - Add crc_t10dif_update common helper (akinobu + mkp) - Handle target-core odd SGL mapping for data transfer memory (akinobu) - Move transport ID handling into target-core (hch) - Move task tag into struct se_cmd + support 64-bit tags (bart) - Convert se_node_acl->device_list[] to RCU hlist (nab + hch + paulmck) - Convert se_portal_group->tpg_lun_list[] to RCU hlist (nab + hch + paulmck) - Simplify target backend driver registration (hch) - Consolidate + simplify target backend attribute implementations (hch + nab) - Subsume se_port + t10_alua_tg_pt_gp_member into se_lun (hch) - Drop lun_sep_lock for se_lun->lun_se_dev RCU usage (hch + nab) - Drop unnecessary core_tpg_register TFO parameter (nab) - Use 64-bit LUNs tree-wide (hannes) - Drop left-over TARGET_MAX_LUNS_PER_TRANSPORT limit (hannes)" * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (76 commits) target: Bump core version to v5.0 target: remove target_core_configfs.h target: remove unused TARGET_CORE_CONFIG_ROOT define target: consolidate version defines target: implement WRITE_SAME with UNMAP bit using ->execute_unmap target: simplify UNMAP handling target: replace se_cmd->execute_rw with a protocol_data field target/user: Fix inconsistent kmap_atomic/kunmap_atomic target: Send UA when changing LUN inventory target: Send UA upon LUN RESET tmr completion target: Send UA on ALUA target port group change target: Convert se_lun->lun_deve_lock to normal spinlock target: use 'se_dev_entry' when allocating UAs target: Remove 'ua_nacl' pointer from se_ua structure target_core_alua: Correct UA handling when switching states xen-scsiback: Fix compile warning for 64-bit LUN target: Remove TARGET_MAX_LUNS_PER_TRANSPORT target: use 64-bit LUNs target: Drop duplicate + unused se_dev_check_wce target: Drop unnecessary core_tpg_register TFO parameter ...
Diffstat (limited to 'drivers/target/target_core_pscsi.c')
-rw-r--r--drivers/target/target_core_pscsi.c55
1 files changed, 19 insertions, 36 deletions
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c
index 26581e215141..08e9084ee615 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -42,9 +42,9 @@
#include <target/target_core_base.h>
#include <target/target_core_backend.h>
-#include <target/target_core_backend_configfs.h>
#include "target_core_alua.h"
+#include "target_core_internal.h"
#include "target_core_pscsi.h"
#define ISPRINT(a) ((a >= ' ') && (a <= '~'))
@@ -54,8 +54,6 @@ static inline struct pscsi_dev_virt *PSCSI_DEV(struct se_device *dev)
return container_of(dev, struct pscsi_dev_virt, dev);
}
-static struct se_subsystem_api pscsi_template;
-
static sense_reason_t pscsi_execute_cmd(struct se_cmd *cmd);
static void pscsi_req_done(struct request *, int);
@@ -80,7 +78,7 @@ static int pscsi_attach_hba(struct se_hba *hba, u32 host_id)
pr_debug("CORE_HBA[%d] - TCM SCSI HBA Driver %s on"
" Generic Target Core Stack %s\n", hba->hba_id,
- PSCSI_VERSION, TARGET_CORE_MOD_VERSION);
+ PSCSI_VERSION, TARGET_CORE_VERSION);
pr_debug("CORE_HBA[%d] - Attached SCSI HBA to Generic\n",
hba->hba_id);
@@ -579,6 +577,14 @@ static int pscsi_configure_device(struct se_device *dev)
return -ENODEV;
}
+static void pscsi_dev_call_rcu(struct rcu_head *p)
+{
+ struct se_device *dev = container_of(p, struct se_device, rcu_head);
+ struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
+
+ kfree(pdv);
+}
+
static void pscsi_free_device(struct se_device *dev)
{
struct pscsi_dev_virt *pdv = PSCSI_DEV(dev);
@@ -610,8 +616,7 @@ static void pscsi_free_device(struct se_device *dev)
pdv->pdv_sd = NULL;
}
-
- kfree(pdv);
+ call_rcu(&dev->rcu_head, pscsi_dev_call_rcu);
}
static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
@@ -635,12 +640,14 @@ static void pscsi_transport_complete(struct se_cmd *cmd, struct scatterlist *sg,
* Hack to make sure that Write-Protect modepage is set if R/O mode is
* forced.
*/
- if (!cmd->se_deve || !cmd->data_length)
+ if (!cmd->data_length)
goto after_mode_sense;
if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
(status_byte(result) << 1) == SAM_STAT_GOOD) {
- if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) {
+ bool read_only = target_lun_is_rdonly(cmd);
+
+ if (read_only) {
unsigned char *buf;
buf = transport_kmap_data_sg(cmd);
@@ -1116,27 +1123,7 @@ static void pscsi_req_done(struct request *req, int uptodate)
kfree(pt);
}
-DEF_TB_DEV_ATTRIB_RO(pscsi, hw_pi_prot_type);
-TB_DEV_ATTR_RO(pscsi, hw_pi_prot_type);
-
-DEF_TB_DEV_ATTRIB_RO(pscsi, hw_block_size);
-TB_DEV_ATTR_RO(pscsi, hw_block_size);
-
-DEF_TB_DEV_ATTRIB_RO(pscsi, hw_max_sectors);
-TB_DEV_ATTR_RO(pscsi, hw_max_sectors);
-
-DEF_TB_DEV_ATTRIB_RO(pscsi, hw_queue_depth);
-TB_DEV_ATTR_RO(pscsi, hw_queue_depth);
-
-static struct configfs_attribute *pscsi_backend_dev_attrs[] = {
- &pscsi_dev_attrib_hw_pi_prot_type.attr,
- &pscsi_dev_attrib_hw_block_size.attr,
- &pscsi_dev_attrib_hw_max_sectors.attr,
- &pscsi_dev_attrib_hw_queue_depth.attr,
- NULL,
-};
-
-static struct se_subsystem_api pscsi_template = {
+static const struct target_backend_ops pscsi_ops = {
.name = "pscsi",
.owner = THIS_MODULE,
.transport_flags = TRANSPORT_FLAG_PASSTHROUGH,
@@ -1152,21 +1139,17 @@ static struct se_subsystem_api pscsi_template = {
.show_configfs_dev_params = pscsi_show_configfs_dev_params,
.get_device_type = pscsi_get_device_type,
.get_blocks = pscsi_get_blocks,
+ .tb_dev_attrib_attrs = passthrough_attrib_attrs,
};
static int __init pscsi_module_init(void)
{
- struct target_backend_cits *tbc = &pscsi_template.tb_cits;
-
- target_core_setup_sub_cits(&pscsi_template);
- tbc->tb_dev_attrib_cit.ct_attrs = pscsi_backend_dev_attrs;
-
- return transport_subsystem_register(&pscsi_template);
+ return transport_backend_register(&pscsi_ops);
}
static void __exit pscsi_module_exit(void)
{
- transport_subsystem_release(&pscsi_template);
+ target_backend_unregister(&pscsi_ops);
}
MODULE_DESCRIPTION("TCM PSCSI subsystem plugin");

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