drivers/md/bcache/super.c

File Facts

System

Linux kernel

Corpus path

drivers/md/bcache/super.c

Extension

.c

Size

74913 bytes

Lines

2976

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

• bcache.h
• btree.h
• debug.h
• extents.h
• request.h
• writeback.h
• features.h
• linux/blkdev.h
• linux/pagemap.h
• linux/debugfs.h
• linux/idr.h
• linux/kthread.h
• linux/workqueue.h
• linux/module.h
• linux/random.h
• linux/reboot.h
• linux/sysfs.h

Detected Declarations

• struct async_reg_args
• struct pdev
• function get_bucket_size
• function write_bdev_super_endio
• function __write_super
• function CLOSURE_CALLBACK
• function bch_write_bdev_super
• function write_super_endio
• function CLOSURE_CALLBACK
• function bcache_write_super
• function uuid_endio
• function CLOSURE_CALLBACK
• function uuid_io
• function __uuid_write
• function bch_uuid_write
• function prio_endio
• function prio_io
• function bch_prio_write
• function prio_read
• function open_dev
• function release_dev
• function ioctl_dev
• function bcache_device_stop
• function bcache_device_unlink
• function bcache_device_link
• function bcache_device_detach
• function bcache_device_attach
• function first_minor_to_idx
• function idx_to_first_minor
• function bcache_device_free
• function bcache_device_init
• function calc_cached_dev_sectors
• function cached_dev_status_update
• function bch_cached_dev_run
• function quits
• function cached_dev_detach_finish
• function bch_cached_dev_detach
• function bch_cached_dev_attach
• function bch_cached_dev_release
• function CLOSURE_CALLBACK
• function CLOSURE_CALLBACK
• function cached_dev_init
• function register_bdev
• function bch_flash_dev_release
• function CLOSURE_CALLBACK
• function CLOSURE_CALLBACK
• function flash_dev_run
• function flash_devs_run

Annotated Snippet

module_init(bcache_init);

module_param(bch_cutoff_writeback, uint, 0);
MODULE_PARM_DESC(bch_cutoff_writeback, "threshold to cutoff writeback");

module_param(bch_cutoff_writeback_sync, uint, 0);
MODULE_PARM_DESC(bch_cutoff_writeback_sync, "hard threshold to cutoff writeback");

MODULE_DESCRIPTION("Bcache: a Linux block layer cache");
MODULE_AUTHOR("Kent Overstreet <kent.overstreet@gmail.com>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `bcache.h`, `btree.h`, `debug.h`, `extents.h`, `request.h`, `writeback.h`, `features.h`, `linux/blkdev.h`.
• Detected declarations: `struct async_reg_args`, `struct pdev`, `function get_bucket_size`, `function write_bdev_super_endio`, `function __write_super`, `function CLOSURE_CALLBACK`, `function bch_write_bdev_super`, `function write_super_endio`, `function CLOSURE_CALLBACK`, `function bcache_write_super`.
• 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.