Hi all,
This series delivers a new feature -- metadata inode directories. This
is a separate directory tree (rooted in the superblock) that contains
only inodes that contain filesystem metadata. Different metadata
objects can be looked up with regular paths.
Start by creating xfs_imeta{dir,file}* functions to mediate access to
the metadata directory tree. By the end of this mega series, all
existing metadata inodes (rt+quota) will use this directory tree instead
of the superblock.
Next, define the metadir on-disk format, which consists of marking
inodes with a new iflag that says they're metadata. This prevents
bulkstat and friends from ever getting their hands on fs metadata files.
If you're going to start using this code, I strongly recommend pulling
from my git trees, which are linked below.
With a bit of luck, this should all go splendidly.
Comments and questions are, as always, welcome.
--D
kernel git tree:
https://git.kernel.org/cgit/linux/kernel/git/djwong/xfs-linux.git/log/?h=metadata-directory-tree-6.13
---
Commits in this patchset:
* xfs: constify the xfs_sb predicates
* xfs: constify the xfs_inode predicates
* xfs: rename metadata inode predicates
* xfs: standardize EXPERIMENTAL warning generation
* xfs: define the on-disk format for the metadir feature
* xfs: iget for metadata inodes
* xfs: load metadata directory root at mount time
* xfs: enforce metadata inode flag
* xfs: read and write metadata inode directory tree
* xfs: disable the agi rotor for metadata inodes
* xfs: hide metadata inodes from everyone because they are special
* xfs: advertise metadata directory feature
* xfs: allow bulkstat to return metadata directories
* xfs: don't count metadata directory files to quota
* xfs: mark quota inodes as metadata files
* xfs: adjust xfs_bmap_add_attrfork for metadir
* xfs: record health problems with the metadata directory
* xfs: refactor directory tree root predicates
* xfs: do not count metadata directory files when doing online quotacheck
* xfs: metadata files can have xattrs if metadir is enabled
* xfs: adjust parent pointer scrubber for sb-rooted metadata files
* xfs: fix di_metatype field of inodes that won't load
* xfs: scrub metadata directories
* xfs: check the metadata directory inumber in superblocks
* xfs: move repair temporary files to the metadata directory tree
* xfs: check metadata directory file path connectivity
* xfs: confirm dotdot target before replacing it during a repair
* xfs: repair metadata directory file path connectivity
---
fs/xfs/Makefile | 5
fs/xfs/libxfs/xfs_attr.c | 5
fs/xfs/libxfs/xfs_bmap.c | 5
fs/xfs/libxfs/xfs_format.h | 121 +++++++--
fs/xfs/libxfs/xfs_fs.h | 25 ++
fs/xfs/libxfs/xfs_health.h | 6
fs/xfs/libxfs/xfs_ialloc.c | 58 +++-
fs/xfs/libxfs/xfs_inode_buf.c | 90 ++++++-
fs/xfs/libxfs/xfs_inode_buf.h | 3
fs/xfs/libxfs/xfs_inode_util.c | 2
fs/xfs/libxfs/xfs_log_format.h | 2
fs/xfs/libxfs/xfs_metadir.c | 481 ++++++++++++++++++++++++++++++++++++
fs/xfs/libxfs/xfs_metadir.h | 47 ++++
fs/xfs/libxfs/xfs_metafile.c | 52 ++++
fs/xfs/libxfs/xfs_metafile.h | 31 ++
fs/xfs/libxfs/xfs_ondisk.h | 2
fs/xfs/libxfs/xfs_sb.c | 12 +
fs/xfs/libxfs/xfs_types.c | 4
fs/xfs/libxfs/xfs_types.h | 2
fs/xfs/scrub/agheader.c | 5
fs/xfs/scrub/common.c | 65 ++++-
fs/xfs/scrub/common.h | 5
fs/xfs/scrub/dir.c | 10 +
fs/xfs/scrub/dir_repair.c | 20 +
fs/xfs/scrub/dirtree.c | 32 ++
fs/xfs/scrub/dirtree.h | 12 -
fs/xfs/scrub/findparent.c | 28 ++
fs/xfs/scrub/health.c | 1
fs/xfs/scrub/inode.c | 35 ++-
fs/xfs/scrub/inode_repair.c | 34 ++-
fs/xfs/scrub/metapath.c | 521 +++++++++++++++++++++++++++++++++++++++
fs/xfs/scrub/nlinks.c | 4
fs/xfs/scrub/nlinks_repair.c | 4
fs/xfs/scrub/orphanage.c | 4
fs/xfs/scrub/parent.c | 39 ++-
fs/xfs/scrub/parent_repair.c | 37 ++-
fs/xfs/scrub/quotacheck.c | 7 -
fs/xfs/scrub/refcount_repair.c | 2
fs/xfs/scrub/repair.c | 14 +
fs/xfs/scrub/repair.h | 3
fs/xfs/scrub/scrub.c | 12 +
fs/xfs/scrub/scrub.h | 2
fs/xfs/scrub/stats.c | 1
fs/xfs/scrub/tempfile.c | 105 ++++++++
fs/xfs/scrub/tempfile.h | 3
fs/xfs/scrub/trace.c | 1
fs/xfs/scrub/trace.h | 42 +++
fs/xfs/xfs_dquot.c | 1
fs/xfs/xfs_fsops.c | 4
fs/xfs/xfs_health.c | 2
fs/xfs/xfs_icache.c | 74 ++++++
fs/xfs/xfs_inode.c | 19 +
fs/xfs/xfs_inode.h | 36 ++-
fs/xfs/xfs_inode_item.c | 7 -
fs/xfs/xfs_inode_item_recover.c | 2
fs/xfs/xfs_ioctl.c | 7 +
fs/xfs/xfs_iops.c | 15 +
fs/xfs/xfs_itable.c | 33 ++
fs/xfs/xfs_itable.h | 3
fs/xfs/xfs_message.c | 51 ++++
fs/xfs/xfs_message.h | 20 +
fs/xfs/xfs_mount.c | 31 ++
fs/xfs/xfs_mount.h | 25 +-
fs/xfs/xfs_pnfs.c | 3
fs/xfs/xfs_qm.c | 36 +++
fs/xfs/xfs_quota.h | 5
fs/xfs/xfs_rtalloc.c | 38 ++-
fs/xfs/xfs_super.c | 13 -
fs/xfs/xfs_trace.c | 2
fs/xfs/xfs_trace.h | 102 ++++++++
fs/xfs/xfs_trans_dquot.c | 6
fs/xfs/xfs_xattr.c | 3
72 files changed, 2333 insertions(+), 206 deletions(-)
create mode 100644 fs/xfs/libxfs/xfs_metadir.c
create mode 100644 fs/xfs/libxfs/xfs_metadir.h
create mode 100644 fs/xfs/libxfs/xfs_metafile.c
create mode 100644 fs/xfs/libxfs/xfs_metafile.h
create mode 100644 fs/xfs/scrub/metapath.c
