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The nfsd open code has always kept separate read-only, read-write, and write-only opens as necessary to ensure that when a client closes or downgrades, we don't retain more access than necessary. Also, I didn't realize the cache behaved this way when I wrote94415b06eb"nfsd4: a client's own opens needn't prevent delegations". There I assumed fi_fds[O_WRONLY] and fi_fds[O_RDWR] would always be distinct. The violation of that assumption is triggering a WARN_ON_ONCE() and could also cause the server to give out a delegation when it shouldn't. Fixes:94415b06eb("nfsd4: a client's own opens needn't prevent delegations") Tested-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
1091 lines
27 KiB
1091 lines
27 KiB