drivers/md/dm-log-userspace-base.c

File Facts

System

Linux kernel

Corpus path

drivers/md/dm-log-userspace-base.c

Extension

.c

Size

22537 bytes

Lines

932

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

• linux/bio.h
• linux/slab.h
• linux/jiffies.h
• linux/dm-dirty-log.h
• linux/device-mapper.h
• linux/dm-log-userspace.h
• linux/module.h
• linux/workqueue.h
• dm-log-userspace-transfer.h

Detected Declarations

• struct dm_dirty_log_flush_entry
• struct log_c
• function userspace_do_request
• function build_constructor_string
• function do_flush
• function userspace_ctr
• function userspace_dtr
• function userspace_presuspend
• function userspace_postsuspend
• function userspace_resume
• function userspace_get_region_size
• function userspace_is_clean
• function userspace_in_sync
• function flush_one_by_one
• function list_for_each_entry
• function flush_by_group
• function list_for_each_entry_safe
• function userspace_flush
• function userspace_mark_region
• function userspace_clear_region
• function userspace_get_resync_work
• function userspace_set_region_sync
• function userspace_get_sync_count
• function userspace_status
• function userspace_is_remote_recovering
• function userspace_dirty_log_init
• function userspace_dirty_log_exit
• module init userspace_dirty_log_init

Annotated Snippet

module_init(userspace_dirty_log_init);
module_exit(userspace_dirty_log_exit);

MODULE_DESCRIPTION(DM_NAME " userspace dirty log link");
MODULE_AUTHOR("Jonathan Brassow <dm-devel@lists.linux.dev>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/bio.h`, `linux/slab.h`, `linux/jiffies.h`, `linux/dm-dirty-log.h`, `linux/device-mapper.h`, `linux/dm-log-userspace.h`, `linux/module.h`, `linux/workqueue.h`.
• Detected declarations: `struct dm_dirty_log_flush_entry`, `struct log_c`, `function userspace_do_request`, `function build_constructor_string`, `function do_flush`, `function userspace_ctr`, `function userspace_dtr`, `function userspace_presuspend`, `function userspace_postsuspend`, `function userspace_resume`.
• 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.