scsi: target: Add atomic se_device fields

Add atomic fields to the se_device and export them in configfs.

Initially only target_core_iblock will be supported and we will inherit
all the settings from the block layer.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
jpg: Stop being allowed to configure atomic write alignment,
Signed-off-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/20251020103820.2917593-3-john.g.garry@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index b19acd662726d4377036bc80a3e969748947a2e1..5470c1258445a8c7ba5bc02cf76ce99be6bd0234 100644 (file)
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -578,6 +578,11 @@ DEF_CONFIGFS_ATTRIB_SHOW(unmap_zeroes_data);
 DEF_CONFIGFS_ATTRIB_SHOW(max_write_same_len);
 DEF_CONFIGFS_ATTRIB_SHOW(emulate_rsoc);
 DEF_CONFIGFS_ATTRIB_SHOW(submit_type);
+DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_len);
+DEF_CONFIGFS_ATTRIB_SHOW(atomic_alignment);
+DEF_CONFIGFS_ATTRIB_SHOW(atomic_granularity);
+DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_with_boundary);
+DEF_CONFIGFS_ATTRIB_SHOW(atomic_max_boundary);
 
 #define DEF_CONFIGFS_ATTRIB_STORE_U32(_name)                           \
 static ssize_t _name##_store(struct config_item *item, const char *page,\
@@ -1300,6 +1305,11 @@ CONFIGFS_ATTR(, max_write_same_len);
 CONFIGFS_ATTR(, alua_support);
 CONFIGFS_ATTR(, pgr_support);
 CONFIGFS_ATTR(, submit_type);
+CONFIGFS_ATTR_RO(, atomic_max_len);
+CONFIGFS_ATTR_RO(, atomic_alignment);
+CONFIGFS_ATTR_RO(, atomic_granularity);
+CONFIGFS_ATTR_RO(, atomic_max_with_boundary);
+CONFIGFS_ATTR_RO(, atomic_max_boundary);
 
 /*
  * dev_attrib attributes for devices using the target core SBC/SPC
@@ -1343,6 +1353,11 @@ struct configfs_attribute *sbc_attrib_attrs[] = {
        &attr_pgr_support,
        &attr_emulate_rsoc,
        &attr_submit_type,
+       &attr_atomic_alignment,
+       &attr_atomic_max_len,
+       &attr_atomic_granularity,
+       &attr_atomic_max_with_boundary,
+       &attr_atomic_max_boundary,
        NULL,
 };
 EXPORT_SYMBOL(sbc_attrib_attrs);

diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index c4d9116904aa0f577bb1f4b2194152d99c33507b..70ece58d30780de5898c2205d681cda03de087e4 100644 (file)
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -731,6 +731,11 @@ struct se_dev_attrib {
        u32             unmap_granularity;
        u32             unmap_granularity_alignment;
        u32             max_write_same_len;
+       u32             atomic_max_len;
+       u32             atomic_alignment;
+       u32             atomic_granularity;
+       u32             atomic_max_with_boundary;
+       u32             atomic_max_boundary;
        u8              submit_type;
        struct se_device *da_dev;
        struct config_group da_group;