NFS: commit direct writes even if they fail partially

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commit 1b8d97b0a8 upstream.

If some of the WRITE calls making up an O_DIRECT write syscall fail,
we neglect to commit, even if some of the WRITEs succeed.

We also depend on the commit code to free the reference count on the
nfs_page taken in the "if (request_commit)" case at the end of
nfs_direct_write_completion().  The problem was originally noticed
because ENOSPC's encountered partway through a write would result in a
closed file being sillyrenamed when it should have been unlinked.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

J. Bruce Fields 2018-01-16 10:08:00 -05:00 • committed by Greg Kroah-Hartman

parent 6421f29eb8

commit 60017643c2

1 changed files with 1 additions and 3 deletions

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fs/nfs/direct.c

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