nfscl: Fix IO_APPEND writes from kernel space
Commit 867c27c23a
modified the NFS client so that
it did IO_APPEND writes directly to the NFS server
bypassing the buffer cache, via a call to
nfs_directio_write(). Unfortunately, this (very old)
function assumed that the uio iov was for user space
addresses. As such, a IO_APPEND VOP_WRITE() that
was for system space, such as ktrace(1) does, would
write bogus data.
This patch fixes nfs_directio_write() so that it
handles kernel space uio iovs.
Reported by: bz
Tested by: bz
MFC after: 2 weeks
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@ -780,7 +780,7 @@ nfs_directio_write(vp, uiop, cred, ioflag)
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uio.uio_iovcnt = 1;
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uio.uio_offset = uiop->uio_offset;
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uio.uio_resid = size;
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uio.uio_segflg = UIO_USERSPACE;
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uio.uio_segflg = uiop->uio_segflg;
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uio.uio_rw = UIO_WRITE;
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uio.uio_td = td;
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iomode = NFSWRITE_FILESYNC;
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