Documentation/filesystems/btrfs.rst

Source file repositories/reference/linux-study-clean/Documentation/filesystems/btrfs.rst

File Facts

System: Linux kernel
Corpus path: Documentation/filesystems/btrfs.rst
Extension: .rst
Size: 1540 bytes
Lines: 44
Domain: Support Tooling And Documentation
Bucket: Documentation
Inferred role: Support Tooling And Documentation: documentation
Status: atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

No C-style include directives detected by the generator.

Detected Declarations

No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

.. SPDX-License-Identifier: GPL-2.0

=====
BTRFS
=====

Btrfs is a copy on write filesystem for Linux aimed at implementing advanced
features while focusing on fault tolerance, repair and easy administration.
Jointly developed by several companies, licensed under the GPL and open for
contribution from anyone.

The main Btrfs features include:

    * Extent based file storage (2^64 max file size)
    * Space efficient packing of small files
    * Space efficient indexed directories
    * Dynamic inode allocation
    * Writable snapshots
    * Subvolumes (separate internal filesystem roots)
    * Object level mirroring and striping
    * Checksums on data and metadata (multiple algorithms available)
    * Compression (multiple algorithms available)
    * Reflink, deduplication
    * Scrub (on-line checksum verification)
    * Hierarchical quota groups (subvolume and snapshot support)
    * Integrated multiple device support, with several raid algorithms
    * Offline filesystem check
    * Efficient incremental backup and FS mirroring (send/receive)
    * Trim/discard
    * Online filesystem defragmentation
    * Swapfile support
    * Zoned mode
    * Read/write metadata verification
    * Online resize (shrink, grow)

For more information please refer to the documentation site or wiki

  https://btrfs.readthedocs.io


that maintains information about administration tasks, frequently asked
questions, use cases, mount options, comprehensible changelogs, features,
manual pages, source code repositories, contacts etc.

Annotation

Atlas domain: Support Tooling And Documentation / Documentation.
Implementation status: atlas-only.

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.