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nfs: fix v4.2 SEEK on files over 2 gigs
We're incorrectly assigning a loff_t return to an int. If SEEK_HOLE or
SEEK_DATA returns an offset over 2^31 then the application will see a
weird lseek() result (usually -EIO).
Cc: stable@vger.kernel.org
Fixes: bdcc2cd14e
"NFSv4.2: handle NFS-specific llseek errors"
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Reviewed-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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@ -175,10 +175,12 @@ loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
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{
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{
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struct nfs_server *server = NFS_SERVER(file_inode(filep));
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struct nfs_server *server = NFS_SERVER(file_inode(filep));
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struct nfs4_exception exception = { };
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struct nfs4_exception exception = { };
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int err;
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loff_t err;
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do {
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do {
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err = _nfs42_proc_llseek(filep, offset, whence);
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err = _nfs42_proc_llseek(filep, offset, whence);
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if (err >= 0)
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break;
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if (err == -ENOTSUPP)
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if (err == -ENOTSUPP)
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return -EOPNOTSUPP;
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return -EOPNOTSUPP;
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err = nfs4_handle_exception(server, err, &exception);
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err = nfs4_handle_exception(server, err, &exception);
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