nfsd4: zero-length WRITE should succeed
Zero-length writes are legal; from 5661 section 18.32.3: "If the count
is zero, the WRITE will succeed and return a count of zero subject to
permissions checking".
This check is unnecessary and is causing zero-length reads to return
EINVAL.
Cc: stable@vger.kernel.org
Fixes: 3fd9557aec
"NFSD: Refactor the generic write vector fill helper"
Cc: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Родитель
2e6e902d18
Коммит
fdec6114ee
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@ -1016,8 +1016,6 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
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nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
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&write->wr_head, write->wr_buflen);
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if (!nvecs)
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return nfserr_io;
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WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
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status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
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