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NFSv4.2: Serialise O_DIRECT i/o and fallocate()

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[ Upstream commit b93128f29733af5d427a335978a19884c2c230e2 ]

Ensure that all O_DIRECT reads and writes complete before calling
fallocate so that we don't race w.r.t. attribute updates.

Fixes: 99f2378322 ("NFSv4.2: Always flush out writes in nfs42_proc_fallocate()")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Trond Myklebust
2025-09-05 12:11:17 -04:00
committed by Greg Kroah-Hartman
parent 320a0954e2
commit 4089fd70a5
1 changed files with 1 additions and 0 deletions
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fs/nfs/nfs42proc.c
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@@ -112,6 +112,7 @@ static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
exception.inode = inode;
exception.state = lock->open_context->state;
nfs_file_block_o_direct(NFS_I(inode));
err = nfs_sync_inode(inode);
if (err)
goto out;