On Fri, Jan 27, 2012 at 10:22:49AM -0500, bjschuma@xxxxxxxxxx wrote:
> From: Bryan Schumaker <bjschuma@xxxxxxxxxx>
>
> When I initially wrote it, I didn't understand how lists worked so I
> wrote something that didn't use them. I think making a list of stateids
> to test is a more straightforward implementation, especially compared to
> especially compared to decoding stateids while simultaneously encoding
> a reply to the client.
I've applied this and pushed it out. Sorry, can't remember if I replied
before, just noticed this still in my inbox....--b.
>
> Signed-off-by: Bryan Schumaker <bjschuma@xxxxxxxxxx>
> ---
> v2: Use defer_free() to free kmalloc()ed memory.
>
> fs/nfsd/nfs4state.c | 9 ++++++-
> fs/nfsd/nfs4xdr.c | 66 +++++++++++++++-----------------------------------
> fs/nfsd/xdr4.h | 9 +++++-
> 3 files changed, 35 insertions(+), 49 deletions(-)
>
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index e8c98f0..c59a3f6 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -3400,7 +3400,14 @@ __be32
> nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
> struct nfsd4_test_stateid *test_stateid)
> {
> - /* real work is done during encoding */
> + struct nfsd4_test_stateid_id *stateid;
> + struct nfs4_client *cl = cstate->session->se_client;
> +
> + nfs4_lock_state();
> + list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list)
> + stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid);
> + nfs4_unlock_state();
> +
> return nfs_ok;
> }
>
> diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
> index 0ec5a1b..5785a98 100644
> --- a/fs/nfsd/nfs4xdr.c
> +++ b/fs/nfsd/nfs4xdr.c
> @@ -133,22 +133,6 @@ xdr_error: \
> } \
> } while (0)
>
> -static void save_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
> -{
> - savep->p = argp->p;
> - savep->end = argp->end;
> - savep->pagelen = argp->pagelen;
> - savep->pagelist = argp->pagelist;
> -}
> -
> -static void restore_buf(struct nfsd4_compoundargs *argp, struct nfsd4_saved_compoundargs *savep)
> -{
> - argp->p = savep->p;
> - argp->end = savep->end;
> - argp->pagelen = savep->pagelen;
> - argp->pagelist = savep->pagelist;
> -}
> -
> static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes)
> {
> /* We want more bytes than seem to be available.
> @@ -1385,26 +1369,29 @@ nfsd4_decode_sequence(struct nfsd4_compoundargs *argp,
> static __be32
> nfsd4_decode_test_stateid(struct nfsd4_compoundargs *argp, struct nfsd4_test_stateid *test_stateid)
> {
> - unsigned int nbytes;
> - stateid_t si;
> int i;
> - __be32 *p;
> - __be32 status;
> + __be32 *p, status;
> + struct nfsd4_test_stateid_id *stateid;
>
> READ_BUF(4);
> test_stateid->ts_num_ids = ntohl(*p++);
>
> - nbytes = test_stateid->ts_num_ids * sizeof(stateid_t);
> - if (nbytes > (u32)((char *)argp->end - (char *)argp->p))
> - goto xdr_error;
> -
> - test_stateid->ts_saved_args = argp;
> - save_buf(argp, &test_stateid->ts_savedp);
> + INIT_LIST_HEAD(&test_stateid->ts_stateid_list);
>
> for (i = 0; i < test_stateid->ts_num_ids; i++) {
> - status = nfsd4_decode_stateid(argp, &si);
> + stateid = kmalloc(sizeof(struct nfsd4_test_stateid_id), GFP_KERNEL);
> + if (!stateid) {
> + status = PTR_ERR(stateid);
> + goto out;
> + }
> +
> + defer_free(argp, kfree, stateid);
> + INIT_LIST_HEAD(&stateid->ts_id_list);
> + list_add_tail(&stateid->ts_id_list, &test_stateid->ts_stateid_list);
> +
> + status = nfsd4_decode_stateid(argp, &stateid->ts_id_stateid);
> if (status)
> - return status;
> + goto out;
> }
>
> status = 0;
> @@ -3391,30 +3378,17 @@ __be32
> nfsd4_encode_test_stateid(struct nfsd4_compoundres *resp, int nfserr,
> struct nfsd4_test_stateid *test_stateid)
> {
> - struct nfsd4_compoundargs *argp;
> - struct nfs4_client *cl = resp->cstate.session->se_client;
> - stateid_t si;
> + struct nfsd4_test_stateid_id *stateid, *next;
> __be32 *p;
> - int i;
> - int valid;
>
> - restore_buf(test_stateid->ts_saved_args, &test_stateid->ts_savedp);
> - argp = test_stateid->ts_saved_args;
> -
> - RESERVE_SPACE(4);
> + RESERVE_SPACE(4 + (4 * test_stateid->ts_num_ids));
> *p++ = htonl(test_stateid->ts_num_ids);
> - resp->p = p;
>
> - nfs4_lock_state();
> - for (i = 0; i < test_stateid->ts_num_ids; i++) {
> - nfsd4_decode_stateid(argp, &si);
> - valid = nfs4_validate_stateid(cl, &si);
> - RESERVE_SPACE(4);
> - *p++ = htonl(valid);
> - resp->p = p;
> + list_for_each_entry_safe(stateid, next, &test_stateid->ts_stateid_list, ts_id_list) {
> + *p++ = htonl(stateid->ts_id_status);
> }
> - nfs4_unlock_state();
>
> + ADJUST_ARGS();
> return nfserr;
> }
>
> diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
> index 2364747..0a667e9 100644
> --- a/fs/nfsd/xdr4.h
> +++ b/fs/nfsd/xdr4.h
> @@ -343,10 +343,15 @@ struct nfsd4_saved_compoundargs {
> struct page **pagelist;
> };
>
> +struct nfsd4_test_stateid_id {
> + __be32 ts_id_status;
> + stateid_t ts_id_stateid;
> + struct list_head ts_id_list;
> +};
> +
> struct nfsd4_test_stateid {
> __be32 ts_num_ids;
> - struct nfsd4_compoundargs *ts_saved_args;
> - struct nfsd4_saved_compoundargs ts_savedp;
> + struct list_head ts_stateid_list;
> };
>
> struct nfsd4_free_stateid {
> --
> 1.7.8.4
>
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