drivers/scsi/device_handler/scsi_dh_alua.c

File Facts

System

Linux kernel

Corpus path

drivers/scsi/device_handler/scsi_dh_alua.c

Extension

.c

Size

34644 bytes

Lines

1329

Domain

Driver Families

Bucket

drivers/scsi

Inferred role

Driver Families: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/slab.h
• linux/delay.h
• linux/module.h
• linux/unaligned.h
• scsi/scsi.h
• scsi/scsi_proto.h
• scsi/scsi_dbg.h
• scsi/scsi_eh.h
• scsi/scsi_dh.h

Detected Declarations

• struct alua_port_group
• struct alua_dh_data
• struct alua_queue_data
• function release_port_group
• function submit_rtpg
• function submit_stpg
• function list_for_each_entry
• function alua_check_tpgs
• function alua_check_vpd
• function print_alua_state
• function alua_handle_state_transition
• function alua_check_sense
• function alua_tur
• function alua_rtpg
• function submit_rtpg
• function list_for_each_entry_rcu
• function list_for_each_entry_rcu
• function alua_stpg
• function scsi_device_put
• function alua_rtpg_work
• function list_for_each_entry_safe
• function alua_rtpg_queue
• function alua_initialize
• function alua_set_params
• function alua_activate
• function alua_check
• function alua_prep_fn
• function alua_rescan
• function alua_bus_attach
• function alua_bus_detach
• function alua_init
• function alua_exit
• module init alua_init

Annotated Snippet

module_init(alua_init);
module_exit(alua_exit);

MODULE_DESCRIPTION("DM Multipath ALUA support");
MODULE_AUTHOR("Hannes Reinecke <hare@suse.de>");
MODULE_LICENSE("GPL");
MODULE_VERSION(ALUA_DH_VER);

Annotation

• Immediate include surface: `linux/slab.h`, `linux/delay.h`, `linux/module.h`, `linux/unaligned.h`, `scsi/scsi.h`, `scsi/scsi_proto.h`, `scsi/scsi_dbg.h`, `scsi/scsi_eh.h`.
• Detected declarations: `struct alua_port_group`, `struct alua_dh_data`, `struct alua_queue_data`, `function release_port_group`, `function submit_rtpg`, `function submit_stpg`, `function list_for_each_entry`, `function alua_check_tpgs`, `function alua_check_vpd`, `function print_alua_state`.
• Atlas domain: Driver Families / drivers/scsi.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.