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For NFSv4.1/4.2, the client may set the "seqid" field of the
stateid to 0 in RPC requests. This indicates to the server that
it should not check the "seqid" or return NFSERR_OLDSTATEID if the
"seqid" value is not up to date w.r.t. Open/Lock operations
on the stateid. This "seqid" is incremented by the NFSv4 server
for each Open/OpenDowngrade/Lock/Locku operation done on the stateid.
Since a failure return of NFSERR_OLDSTATEID is of no use to
the client for I/O operations, it makes sense to set "seqid"
to 0 for the stateid argument for I/O operations.
This avoids server failure replies of NFSERR_OLDSTATEID,
although I am not aware of any case where this failure occurs.
This makes the FreeBSD NFSv4.1/4.2 client compatible with the
Linux NFSv4.1/4.2 client.
(cherry picked from commit
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| cd9660 | ||
| cuse | ||
| deadfs | ||
| devfs | ||
| ext2fs | ||
| fdescfs | ||
| fifofs | ||
| fuse | ||
| mntfs | ||
| msdosfs | ||
| nfs | ||
| nfsclient | ||
| nfsserver | ||
| nullfs | ||
| procfs | ||
| pseudofs | ||
| smbfs | ||
| tmpfs | ||
| udf | ||
| unionfs | ||