Re: [PATCH v7 00/27] Parent Pointers

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On Sun, Dec 18, 2022 at 03:02:39AM -0700, allison.henderson@xxxxxxxxxx wrote:
> From: Allison Henderson <allison.henderson@xxxxxxxxxx>
> 
> Hi all,
> 
> This is the latest parent pointer attributes for xfs.
> The goal of this patch set is to add a parent pointer attribute to each inode.
> The attribute name containing the parent inode, generation, and directory
> offset, while the  attribute value contains the file name.  This feature will
> enable future optimizations for online scrub, shrink, nfs handles, verity, or
> any other feature that could make use of quickly deriving an inodes path from
> the mount point.  
> 
> This set can be viewed on github here
> https://github.com/allisonhenderson/xfs/tree/xfs_new_pptrsv7
> 
> And the corresponding xfsprogs code is here
> https://github.com/allisonhenderson/xfsprogs/tree/xfsprogs_new_pptrs_v7
> 
> This set has been tested with the below parent pointers tests
> https://lore.kernel.org/fstests/20221012013812.82161-1-catherine.hoang@xxxxxxxxxx/T/#t

I pulled v7 and rebased your patches atop 6.2-rc3.  generic/476 failed
with quotas enabled:

XFS: Assertion failed: q[j].qt_dquot->q_id > d->q_id, file: fs/xfs/xfs_dquot.c, line: 1351
<repeat>

I suspect this is becuase xfs_dqlockn needs to sort the dqtrx structures
by quotaid?

So I turned off quotas and the kernel quieted down.  Good. :)

Next up was xfs_scrub, which complained about *something* in the xattr
structures.  I'm guessing that it probably doesn't know how to deal with
the new pptr namespace or the zeroes that can be present in the pptr
attr name?

Other than that, looks promising.  I'll fix up the scrub and quota
problems and start prototyping fsck code from there.

--D

> Updates since v6:
> Andry had reported intermittent hangs on unmount while running stress tests.
> Reviewed and corrected unlocks in the case of error conditions.
> 
> xfs: parent pointer attribute creation
>   Fixed dp to unlock on error
>   
> xfs: Hold inode locks in xfs_ialloc
>   Fixed ip to unlock on create error
>   
> xfs: add parent attributes to symlink
>   Hold and release dp across pptr operation
>   
> Questions comments and feedback appreciated!
> 
> Thanks all!
> Allison
> 
> 
> Allison Henderson (27):
>   xfs: Add new name to attri/d
>   xfs: Increase XFS_DEFER_OPS_NR_INODES to 5
>   xfs: Increase XFS_QM_TRANS_MAXDQS to 5
>   xfs: Hold inode locks in xfs_ialloc
>   xfs: Hold inode locks in xfs_trans_alloc_dir
>   xfs: Hold inode locks in xfs_rename
>   xfs: Expose init_xattrs in xfs_create_tmpfile
>   xfs: get directory offset when adding directory name
>   xfs: get directory offset when removing directory name
>   xfs: get directory offset when replacing a directory name
>   xfs: add parent pointer support to attribute code
>   xfs: define parent pointer xattr format
>   xfs: Add xfs_verify_pptr
>   xfs: extend transaction reservations for parent attributes
>   xfs: parent pointer attribute creation
>   xfs: add parent attributes to link
>   xfs: add parent attributes to symlink
>   xfs: remove parent pointers in unlink
>   xfs: Indent xfs_rename
>   xfs: Add parent pointers to rename
>   xfs: Add parent pointers to xfs_cross_rename
>   xfs: Add the parent pointer support to the  superblock version 5.
>   xfs: Add helper function xfs_attr_list_context_init
>   xfs: Filter XFS_ATTR_PARENT for getfattr
>   xfs: Add parent pointer ioctl
>   xfs: fix unit conversion error in xfs_log_calc_max_attrsetm_res
>   xfs: drop compatibility minimum log size computations for reflink
> 
>  fs/xfs/Makefile                 |   2 +
>  fs/xfs/libxfs/xfs_attr.c        |  71 +++++-
>  fs/xfs/libxfs/xfs_attr.h        |  13 +-
>  fs/xfs/libxfs/xfs_da_btree.h    |   3 +
>  fs/xfs/libxfs/xfs_da_format.h   |  38 ++-
>  fs/xfs/libxfs/xfs_defer.c       |  28 ++-
>  fs/xfs/libxfs/xfs_defer.h       |   8 +-
>  fs/xfs/libxfs/xfs_dir2.c        |  21 +-
>  fs/xfs/libxfs/xfs_dir2.h        |   7 +-
>  fs/xfs/libxfs/xfs_dir2_block.c  |   9 +-
>  fs/xfs/libxfs/xfs_dir2_leaf.c   |   8 +-
>  fs/xfs/libxfs/xfs_dir2_node.c   |   8 +-
>  fs/xfs/libxfs/xfs_dir2_sf.c     |   6 +
>  fs/xfs/libxfs/xfs_format.h      |   4 +-
>  fs/xfs/libxfs/xfs_fs.h          |  75 ++++++
>  fs/xfs/libxfs/xfs_log_format.h  |   7 +-
>  fs/xfs/libxfs/xfs_log_rlimit.c  |  53 ++++
>  fs/xfs/libxfs/xfs_parent.c      | 207 ++++++++++++++++
>  fs/xfs/libxfs/xfs_parent.h      |  46 ++++
>  fs/xfs/libxfs/xfs_sb.c          |   4 +
>  fs/xfs/libxfs/xfs_trans_resv.c  | 324 ++++++++++++++++++++----
>  fs/xfs/libxfs/xfs_trans_space.h |   8 -
>  fs/xfs/scrub/attr.c             |   2 +-
>  fs/xfs/xfs_attr_item.c          | 142 +++++++++--
>  fs/xfs/xfs_attr_item.h          |   1 +
>  fs/xfs/xfs_attr_list.c          |  17 +-
>  fs/xfs/xfs_dquot.c              |  25 ++
>  fs/xfs/xfs_dquot.h              |   1 +
>  fs/xfs/xfs_file.c               |   1 +
>  fs/xfs/xfs_inode.c              | 427 +++++++++++++++++++++++++-------
>  fs/xfs/xfs_inode.h              |   3 +-
>  fs/xfs/xfs_ioctl.c              | 148 +++++++++--
>  fs/xfs/xfs_ioctl.h              |   2 +
>  fs/xfs/xfs_iops.c               |   3 +-
>  fs/xfs/xfs_ondisk.h             |   4 +
>  fs/xfs/xfs_parent_utils.c       | 125 ++++++++++
>  fs/xfs/xfs_parent_utils.h       |  11 +
>  fs/xfs/xfs_qm.c                 |   4 +-
>  fs/xfs/xfs_qm.h                 |   2 +-
>  fs/xfs/xfs_super.c              |   4 +
>  fs/xfs/xfs_symlink.c            |  58 ++++-
>  fs/xfs/xfs_trans.c              |   6 +-
>  fs/xfs/xfs_trans_dquot.c        |  15 +-
>  fs/xfs/xfs_xattr.c              |   5 +-
>  fs/xfs/xfs_xattr.h              |   1 +
>  45 files changed, 1712 insertions(+), 245 deletions(-)
>  create mode 100644 fs/xfs/libxfs/xfs_parent.c
>  create mode 100644 fs/xfs/libxfs/xfs_parent.h
>  create mode 100644 fs/xfs/xfs_parent_utils.c
>  create mode 100644 fs/xfs/xfs_parent_utils.h
> 
> -- 
> 2.25.1
> 



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