drivers/md/dm-raid1.c

File Facts

System

Linux kernel

Corpus path

drivers/md/dm-raid1.c

Extension

.c

Size

36690 bytes

Lines

1532

Domain

Driver Families

Bucket

drivers/md

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

• dm-bio-record.h
• linux/init.h
• linux/mempool.h
• linux/module.h
• linux/pagemap.h
• linux/slab.h
• linux/workqueue.h
• linux/device-mapper.h
• linux/dm-io.h
• linux/dm-dirty-log.h
• linux/dm-kcopyd.h
• linux/dm-region-hash.h

Detected Declarations

• struct mirror
• struct mirror_set
• struct dm_raid1_bio_record
• enum dm_raid1_error
• function wakeup_mirrord
• function delayed_wake_fn
• function delayed_wake
• function wakeup_all_recovery_waiters
• function queue_bio
• function dispatch_bios
• function bio_set_m
• function set_default_mirror
• function fail_mirror
• function mirror_flush
• function recovery_complete
• function recover
• function reset_ms_flags
• function do_recovery
• function default_ok
• function mirror_available
• function map_sector
• function map_bio
• function map_region
• function hold_bio
• function read_callback
• function read_async_bio
• function region_in_sync
• function do_reads
• function write_callback
• function do_write
• function do_writes
• function do_failures
• function trigger_event
• function do_mirror
• function free_context
• function get_mirror
• function parse_features
• function mirror_ctr
• function mirror_dtr
• function mirror_map
• function mirror_end_io
• function mirror_presuspend
• function mirror_postsuspend
• function mirror_resume
• function device_status_char
• function mirror_status
• function mirror_iterate_devices
• function dm_mirror_init

Annotated Snippet

module_init(dm_mirror_init);
module_exit(dm_mirror_exit);

MODULE_DESCRIPTION(DM_NAME " mirror target");
MODULE_AUTHOR("Joe Thornber");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `dm-bio-record.h`, `linux/init.h`, `linux/mempool.h`, `linux/module.h`, `linux/pagemap.h`, `linux/slab.h`, `linux/workqueue.h`, `linux/device-mapper.h`.
• Detected declarations: `struct mirror`, `struct mirror_set`, `struct dm_raid1_bio_record`, `enum dm_raid1_error`, `function wakeup_mirrord`, `function delayed_wake_fn`, `function delayed_wake`, `function wakeup_all_recovery_waiters`, `function queue_bio`, `function dispatch_bios`.
• Atlas domain: Driver Families / drivers/md.
• 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.