[v2,0/5] Fix O_DIRECT writeback error paths

Message

Trond Myklebust Sept. 4, 2023, 4:34 p.m. UTC

From: Trond Myklebust <[e-mail]>

In recent tests of the O_DIRECT code, a number of bugs were discovered
in the error codepaths, some of which were shown to result in data
corruption. The tests involved using pNFS flexfiles with 3-way
mirroring, and then shutting down one of the data servers. When the data
was later re-read from the server, it was shown to not match the
original data.

---
v1 - NFS: Fix error handling for O_DIRECT write scheduling
v2 - Fixes for incorrect commit info
     Fixes for O_DIRECT accounting
     O_DIRECT locking issues
     Fix write scheduling issues

Trond Myklebust (5):
  NFS: Fix error handling for O_DIRECT write scheduling
  NFS: Fix O_DIRECT locking issues
  NFS: More O_DIRECT accounting fixes for error paths
  NFS: Use the correct commit info in nfs_join_page_group()
  NFS: More fixes for nfs_direct_write_reschedule_io()

 fs/nfs/direct.c          | 134 +++++++++++++++++++++++++++------------
 fs/nfs/write.c           |  23 +++----
 include/linux/nfs_page.h |   4 +-
 3 files changed, 108 insertions(+), 53 deletions(-)