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NFSD: Clean up the test_stateid function

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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.

Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Bryan Schumaker 2012-01-27 10:22:49 -05:00 committed by J. Bruce Fields
parent de5b8e8e04
commit 03cfb42025
3 changed files with 35 additions and 49 deletions
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9
fs/nfsd/nfs4state.c
View File

@ -3402,7 +3402,14 @@ __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;
}

66
fs/nfsd/nfs4xdr.c
View File

@ -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.
@ -1396,26 +1380,29 @@ 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;
@ -3402,30 +3389,17 @@ __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;
}

9
fs/nfsd/xdr4.h
View File

@ -356,10 +356,15 @@ 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 {