Re: [PATCH 04/20] nfsd: factor out a helper to decode nfstime4 values

J. Bruce Fields
2015-01-22T20:15:54Z

I'll go ahead and take this one.--b.

On Thu, Jan 22, 2015 at 12:09:50PM +0100, Christoph Hellwig wrote:
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> fs/nfsd/nfs4xdr.c | 43 ++++++++++++++++++++++++++-----------------
> 1 file changed, 26 insertions(+), 17 deletions(-)
>
> diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
> index 15f7b73..884ffa3 100644
> --- a/fs/nfsd/nfs4xdr.c
> +++ b/fs/nfsd/nfs4xdr.c
> @@ -234,6 +234,26 @@ static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
> return ret;
> }
>
> +/*
> + * We require the high 32 bits of 'seconds' to be 0, and
> + * we ignore all 32 bits of 'nseconds'.
> + */
> +static __be32
> +nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
> +{
> + DECODE_HEAD;
> + u64 sec;
> +
> + READ_BUF(12);
> + p = xdr_decode_hyper(p, &sec);
> + tv->tv_sec = sec;
> + tv->tv_nsec = be32_to_cpup(p++);
> + if (tv->tv_nsec >= (u32)1000000000)
> + return nfserr_inval;
> +
> + DECODE_TAIL;
> +}
> +
> static __be32
> nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval)
> {
> @@ -267,7 +287,6 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
> {
> int expected_len, len = 0;
> u32 dummy32;
> - u64 sec;
> char *buf;
>
> DECODE_HEAD;
> @@ -358,15 +377,10 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
> dummy32 = be32_to_cpup(p++);
> switch (dummy32) {
> case NFS4_SET_TO_CLIENT_TIME:
> - /* We require the high 32 bits of 'seconds' to be 0, and we ignore
> - all 32 bits of 'nseconds'. */
> - READ_BUF(12);
> len += 12;
> - p = xdr_decode_hyper(p, &sec);
> - iattr->ia_atime.tv_sec = (time_t)sec;
> - iattr->ia_atime.tv_nsec = be32_to_cpup(p++);
> - if (iattr->ia_atime.tv_nsec >= (u32)1000000000)
> - return nfserr_inval;
> + status = nfsd4_decode_time(argp, &iattr->ia_atime);
> + if (status)
> + return status;
> iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
> break;
> case NFS4_SET_TO_SERVER_TIME:
> @@ -382,15 +396,10 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
> dummy32 = be32_to_cpup(p++);
> switch (dummy32) {
> case NFS4_SET_TO_CLIENT_TIME:
> - /* We require the high 32 bits of 'seconds' to be 0, and we ignore
> - all 32 bits of 'nseconds'. */
> - READ_BUF(12);
> len += 12;
> - p = xdr_decode_hyper(p, &sec);
> - iattr->ia_mtime.tv_sec = sec;
> - iattr->ia_mtime.tv_nsec = be32_to_cpup(p++);
> - if (iattr->ia_mtime.tv_nsec >= (u32)1000000000)
> - return nfserr_inval;
> + status = nfsd4_decode_time(argp, &iattr->ia_mtime);
> + if (status)
> + return status;
> iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
> break;
> case NFS4_SET_TO_SERVER_TIME:
> --
> 1.9.1