[RESEND,v18,00/11] Delay Ready Attributes

Message

Allison Henderson May 12, 2021, 4:13 p.m. UTC

Hi all,

This set is a subset of a larger series for Dealyed Attributes. Which is a
subset of a yet larger series for parent pointers. Delayed attributes allow
attribute operations (set and remove) to be logged and committed in the same
way that other delayed operations do. This allows more complex operations (like
parent pointers) to be broken up into multiple smaller transactions. To do
this, the existing attr operations must be modified to operate as a delayed
operation.  This means that they cannot roll, commit, or finish transactions.
Instead, they return -EAGAIN to allow the calling function to handle the
transaction.  In this series, we focus on only the delayed attribute portion.
We will introduce parent pointers in a later set.

The set as a whole is a bit much to digest at once, so I usually send out the
smaller sub series to reduce reviewer burn out.  But the entire extended series
is visible through the included github links.

This set is just a rebase and resend since the last review came back with no nits.

This series can be viewed on github here:
https://github.com/allisonhenderson/xfs_work/tree/delay_ready_attrs_v18_rebase

As well as the extended delayed attribute and parent pointer series:
https://github.com/allisonhenderson/xfs_work/tree/delay_ready_attrs_v18_extended_rebase

And the test cases:
https://github.com/allisonhenderson/xfs_work/tree/pptr_xfstestsv3

In order to run the test cases, you will need have the corresponding xfsprogs
changes as well.  Which can be found here:
https://github.com/allisonhenderson/xfs_work/tree/delay_ready_attrs_xfsprogs_v18_rebase
https://github.com/allisonhenderson/xfs_work/tree/delay_ready_attrs_xfsprogs_v18_extended_rebase

To run the xfs attributes tests run:
check -g attr

To run as delayed attributes run:
export MOUNT_OPTIONS="-o delattr"
check -g attr

To run parent pointer tests:
check -g parent

I've also made the corresponding updates to the user space side as well, and ported anything
they need to seat correctly.

Questions, comment and feedback appreciated! 

Thanks all!
Allison 

Allison Henderson (11):
  xfs: Reverse apply 72b97ea40d
  xfs: Add xfs_attr_node_remove_name
  xfs: Hoist xfs_attr_set_shortform
  xfs: Add helper xfs_attr_set_fmt
  xfs: Separate xfs_attr_node_addname and
    xfs_attr_node_addname_clear_incomplete
  xfs: Add helper xfs_attr_node_addname_find_attr
  xfs: Hoist xfs_attr_node_addname
  xfs: Hoist xfs_attr_leaf_addname
  xfs: Hoist node transaction handling
  xfs: Add delay ready attr remove routines
  xfs: Add delay ready attr set routines

 fs/xfs/libxfs/xfs_attr.c        | 897 ++++++++++++++++++++++++----------------
 fs/xfs/libxfs/xfs_attr.h        | 401 ++++++++++++++++++
 fs/xfs/libxfs/xfs_attr_leaf.c   |   2 +-
 fs/xfs/libxfs/xfs_attr_remote.c | 126 ++++--
 fs/xfs/libxfs/xfs_attr_remote.h |   7 +-
 fs/xfs/xfs_attr_inactive.c      |   2 +-
 fs/xfs/xfs_trace.h              |   2 -
 7 files changed, 1031 insertions(+), 406 deletions(-)