drivers/md/dm-bio-prison-v1.c

File Facts

System

Linux kernel

Corpus path

drivers/md/dm-bio-prison-v1.c

Extension

.c

Size

10608 bytes

Lines

459

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.h
• dm-bio-prison-v1.h
• dm-bio-prison-v2.h
• linux/spinlock.h
• linux/mempool.h
• linux/module.h
• linux/slab.h

Detected Declarations

• struct prison_region
• struct dm_bio_prison
• struct dm_deferred_entry
• struct dm_deferred_set
• function dm_bio_prison_destroy
• function dm_bio_prison_free_cell
• function __setup_new_cell
• function cmp_keys
• function lock_nr
• function dm_cell_key_has_valid_range
• function __bio_detain
• function bio_detain
• function dm_bio_detain
• function __cell_release
• function dm_cell_release
• function __cell_release_no_holder
• function dm_cell_release_no_holder
• function dm_cell_error
• function dm_cell_visit_release
• function dm_deferred_set_destroy
• function ds_next
• function __sweep
• function dm_deferred_entry_dec
• function dm_deferred_set_add_work
• function dm_bio_prison_init_v1
• function dm_bio_prison_exit_v1
• function dm_bio_prison_init
• function dm_bio_prison_exit
• module init dm_bio_prison_init
• export dm_bio_prison_create
• export dm_bio_prison_destroy
• export dm_bio_prison_alloc_cell
• export dm_bio_prison_free_cell
• export dm_cell_key_has_valid_range
• export dm_bio_detain
• export dm_cell_release
• export dm_cell_release_no_holder
• export dm_cell_error
• export dm_cell_visit_release
• export dm_deferred_set_create
• export dm_deferred_set_destroy
• export dm_deferred_entry_inc
• export dm_deferred_entry_dec
• export dm_deferred_set_add_work

Annotated Snippet

module_init(dm_bio_prison_init);
module_exit(dm_bio_prison_exit);

MODULE_DESCRIPTION(DM_NAME " bio prison");
MODULE_AUTHOR("Joe Thornber <dm-devel@lists.linux.dev>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `dm.h`, `dm-bio-prison-v1.h`, `dm-bio-prison-v2.h`, `linux/spinlock.h`, `linux/mempool.h`, `linux/module.h`, `linux/slab.h`.
• Detected declarations: `struct prison_region`, `struct dm_bio_prison`, `struct dm_deferred_entry`, `struct dm_deferred_set`, `function dm_bio_prison_destroy`, `function dm_bio_prison_free_cell`, `function __setup_new_cell`, `function cmp_keys`, `function lock_nr`, `function dm_cell_key_has_valid_range`.
• 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.