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

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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>
This commit is contained in:
Trond Myklebust 2025-09-05 12:11:17 -04:00
parent 9eb90f4354
commit b93128f297
1 changed files with 1 additions and 0 deletions
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fs/nfs/nfs42proc.c
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@ -114,6 +114,7 @@ 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;