mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
synced 2026-11-10 20:48:12 +00:00
No description
- C 96.8%
- Assembly 0.9%
- Rust 0.7%
- Shell 0.6%
- Python 0.5%
- Other 0.3%
1da824b0bf
This series implements online repair for directory parent pointer metadata. The checking half is fairly straightforward -- for each outgoing directory link (forward or backwards), grab the inode at the other end, and confirm that there's a corresponding link. If we can't grab an inode or lock it, we'll save that link for a slower loop that cycles all the locks, confirms the continued existence of the link, and rechecks the link if it's actually still there. Repairs are a bit more involved -- for directories, we walk the entire filesystem to rebuild the dirents from parent pointer information. Parent pointer repairs do the same walk but rebuild the pptrs from the dirent information, but with the added twist that it duplicates all the xattrs so that it can use the atomic extent swapping code to commit the repairs atomically. This introduces an added twist to the xattr repair code -- we use dirent hooks to detect a colliding update to the pptr data while we're not holding the ILOCKs; if one is detected, we restart the xattr salvaging process but this time hold all the ILOCKs until the end of the scan. For offline repair, the phase6 directory connectivity scan generates an index of all the expected parent pointers in the filesystem. Then it walks each file and compares the parent pointers attached to that file against the index generated, and resyncs the results as necessary. This has been running on the djcloud for months with no problems. Enjoy! Signed-off-by: Darrick J. Wong <djwong@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQQ2qTKExjcn+O1o2YRKO3ySh0YRpgUCZih1NgAKCRBKO3ySh0YR pi/tAQCAMBb+xkfs+RR/qmCwCcoyw2rQwEPKOPqhLxfYdlqc5AEAsa64aKliv5vf Z6ShYoEpK4SuwclOqf9qFafN4D6zKg4= =SurM -----END PGP SIGNATURE----- Merge tag 'repair-pptrs-6.10_2024-04-23' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.10-mergeC xfs: online repair for parent pointers This series implements online repair for directory parent pointer metadata. The checking half is fairly straightforward -- for each outgoing directory link (forward or backwards), grab the inode at the other end, and confirm that there's a corresponding link. If we can't grab an inode or lock it, we'll save that link for a slower loop that cycles all the locks, confirms the continued existence of the link, and rechecks the link if it's actually still there. Repairs are a bit more involved -- for directories, we walk the entire filesystem to rebuild the dirents from parent pointer information. Parent pointer repairs do the same walk but rebuild the pptrs from the dirent information, but with the added twist that it duplicates all the xattrs so that it can use the atomic extent swapping code to commit the repairs atomically. This introduces an added twist to the xattr repair code -- we use dirent hooks to detect a colliding update to the pptr data while we're not holding the ILOCKs; if one is detected, we restart the xattr salvaging process but this time hold all the ILOCKs until the end of the scan. For offline repair, the phase6 directory connectivity scan generates an index of all the expected parent pointers in the filesystem. Then it walks each file and compares the parent pointers attached to that file against the index generated, and resyncs the results as necessary. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Chandan Babu R <chandanbabu@kernel.org> * tag 'repair-pptrs-6.10_2024-04-23' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux: xfs: inode repair should ensure there's an attr fork to store parent pointers xfs: repair link count of nondirectories after rebuilding parent pointers xfs: adapt the orphanage code to handle parent pointers xfs: actually rebuild the parent pointer xattrs xfs: add a per-leaf block callback to xchk_xattr_walk xfs: split xfs_bmap_add_attrfork into two pieces xfs: remove pointless unlocked assertion xfs: implement live updates for parent pointer repairs xfs: repair directory parent pointers by scanning for dirents xfs: replay unlocked parent pointer updates that accrue during xattr repair xfs: implement live updates for directory repairs xfs: repair directories by scanning directory parent pointers xfs: add raw parent pointer apis to support repair xfs: salvage parent pointers when rebuilding xattr structures xfs: make the reserved block permission flag explicit in xfs_attr_set xfs: remove some boilerplate from xfs_attr_set |
History
|
|
|---|---|---|
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.