drivers/md/md-cluster.c

File Facts

System

Linux kernel

Corpus path

drivers/md/md-cluster.c

Extension

.c

Size

46793 bytes

Lines

1670

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/module.h
• linux/kthread.h
• linux/dlm.h
• linux/sched.h
• linux/raid/md_p.h
• md.h
• md-bitmap.h
• md-cluster.h

Detected Declarations

• struct dlm_lock_resource
• struct resync_info
• struct md_cluster_info
• struct cluster_msg
• enum msg_type
• function sync_ast
• function dlm_lock_sync
• function dlm_unlock_sync
• function dlm_lock_sync_interruptible
• function lockres_free
• function add_resync_info
• function read_resync_info
• function recover_bitmaps
• function recover_prep
• function __recover_slot
• function recover_slot
• function recover_done
• function ack_bast
• function remove_suspend_info
• function process_suspend_info
• function rdev_for_each
• function process_add_new_disk
• function process_metadata_update
• function process_remove_disk
• function process_readd_disk
• function process_recvd_msg
• function recv_daemon
• function lock_token
• function lock_comm
• function reconfig_mutex
• function unlock_comm
• function __sendmsg
• function sendmsg
• function gather_all_resync_info
• function join
• function load_bitmaps
• function resync_bitmap
• function leave
• function slot_number
• function metadata_update_start
• function metadata_update_finish
• function metadata_update_cancel
• function update_bitmap_size
• function resize_bitmaps
• function cluster_check_sync_size
• function update_size
• function resync_start
• function resync_info_get

Annotated Snippet

module_init(cluster_init);
module_exit(cluster_exit);
MODULE_AUTHOR("SUSE");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Clustering support for MD");

Annotation

• Immediate include surface: `linux/module.h`, `linux/kthread.h`, `linux/dlm.h`, `linux/sched.h`, `linux/raid/md_p.h`, `md.h`, `md-bitmap.h`, `md-cluster.h`.
• Detected declarations: `struct dlm_lock_resource`, `struct resync_info`, `struct md_cluster_info`, `struct cluster_msg`, `enum msg_type`, `function sync_ast`, `function dlm_lock_sync`, `function dlm_unlock_sync`, `function dlm_lock_sync_interruptible`, `function lockres_free`.
• 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.