fs/mbcache.c

File Facts

System

Linux kernel

Corpus path

fs/mbcache.c

Extension

.c

Size

12793 bytes

Lines

445

Domain

Core OS

Bucket

VFS And Filesystem Core

Inferred role

Core OS: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

• Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.
• 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/spinlock.h
• linux/slab.h
• linux/list.h
• linux/list_bl.h
• linux/module.h
• linux/sched.h
• linux/workqueue.h
• linux/mbcache.h

Detected Declarations

• struct mb_cache
• function mb_cache_entry_create
• function __mb_cache_entry_free
• function mb_cache_entry_wait_unused
• function mb_cache_entry_touch
• function mb_cache_count
• function mb_cache_shrink
• function mb_cache_scan
• function mb_cache_shrink_worker
• function mb_cache_destroy
• function mbcache_init
• function mbcache_exit
• module init mbcache_init
• export mb_cache_entry_create
• export __mb_cache_entry_free
• export mb_cache_entry_wait_unused
• export mb_cache_entry_find_first
• export mb_cache_entry_find_next
• export mb_cache_entry_get
• export mb_cache_entry_delete_or_get
• export mb_cache_entry_touch
• export mb_cache_create
• export mb_cache_destroy

Annotated Snippet

module_init(mbcache_init)
module_exit(mbcache_exit)

MODULE_AUTHOR("Jan Kara <jack@suse.cz>");
MODULE_DESCRIPTION("Meta block cache (for extended attributes)");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/spinlock.h`, `linux/slab.h`, `linux/list.h`, `linux/list_bl.h`, `linux/module.h`, `linux/sched.h`, `linux/workqueue.h`, `linux/mbcache.h`.
• Detected declarations: `struct mb_cache`, `function mb_cache_entry_create`, `function __mb_cache_entry_free`, `function mb_cache_entry_wait_unused`, `function mb_cache_entry_touch`, `function mb_cache_count`, `function mb_cache_shrink`, `function mb_cache_scan`, `function mb_cache_shrink_worker`, `function mb_cache_destroy`.
• Atlas domain: Core OS / VFS And Filesystem Core.
• 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.