fs/nfs/blocklayout/blocklayout.c
Source file repositories/reference/linux-study-clean/fs/nfs/blocklayout/blocklayout.c
File Facts
- System
- Linux kernel
- Corpus path
fs/nfs/blocklayout/blocklayout.c- Extension
.c- Size
- 27559 bytes
- Lines
- 1048
- 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/module.hlinux/init.hlinux/mount.hlinux/namei.hlinux/bio.hlinux/prefetch.h../pnfs.h../nfs4session.h../internal.hblocklayout.h
Detected Declarations
struct parallel_iostruct layout_verificationfunction is_holefunction get_parallelfunction destroy_parallelfunction put_parallelfunction bl_submit_biofunction offset_in_mapfunction do_add_page_to_biofunction bl_mark_devices_unavailablefunction bl_end_io_readfunction bl_read_cleanupfunction bl_end_par_io_readfunction bl_read_pagelistfunction bl_end_io_writefunction bl_write_cleanupfunction bl_end_par_io_writefunction bl_write_pagelistfunction bl_free_layout_hdrfunction bl_free_lsegfunction verify_extentfunction decode_sector_numberfunction bl_find_get_deviceidfunction bl_alloc_extentfunction bl_alloc_lsegfunction bl_return_rangefunction bl_prepare_layoutcommitfunction bl_cleanup_layoutcommitfunction bl_set_layoutdriverfunction is_aligned_reqfunction bl_pg_init_readfunction bytesfunction pnfs_num_cont_bytesfunction bl_pg_init_writefunction bytesfunction nfs4blocklayout_initfunction nfs4blocklayout_exitmodule init nfs4blocklayout_init
Annotated Snippet
module_init(nfs4blocklayout_init);
module_exit(nfs4blocklayout_exit);Annotation
- Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/mount.h`, `linux/namei.h`, `linux/bio.h`, `linux/prefetch.h`, `../pnfs.h`, `../nfs4session.h`.
- Detected declarations: `struct parallel_io`, `struct layout_verification`, `function is_hole`, `function get_parallel`, `function destroy_parallel`, `function put_parallel`, `function bl_submit_bio`, `function offset_in_map`, `function do_add_page_to_bio`, `function bl_mark_devices_unavailable`.
- 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.