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NFSD: Hoist status code encoding into XDR encoder functions

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The original intent was presumably to reduce code duplication. The
trade-off was:

- No support for an NFSD proc function returning a non-success
  RPC accept_stat value.
- No support for void NFS replies to non-NULL procedures.
- Everyone pays for the deduplication with a few extra conditional
  branches in a hot path.

In addition, nfsd_dispatch() leaves *statp uninitialized in the
success path, unlike svc_generic_dispatch().

Address all of these problems by moving the logic for encoding
the NFS status code into the NFS XDR encoders themselves. Then
update the NFS .pc_func methods to return an RPC accept_stat
value.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever 2020-10-02 15:52:44 -04:00 committed by J. Bruce Fields
parent 4b74fd793a
commit cc028a10a4
10 changed files with 145 additions and 120 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
fs/nfsd/nfs2acl.c
View File

@ -21,7 +21,7 @@
static __be32
nfsacld_proc_null(struct svc_rqst *rqstp)
{
return nfs_ok;
return rpc_success;
}
/*
@ -79,7 +79,7 @@ static __be32 nfsacld_proc_getacl(struct svc_rqst *rqstp)
/* resp->acl_{access,default} are released in nfssvc_release_getacl. */
out:
return resp->status;
return rpc_success;
fail:
posix_acl_release(resp->acl_access);
@ -131,7 +131,7 @@ static __be32 nfsacld_proc_setacl(struct svc_rqst *rqstp)
nfssvc_decode_setaclargs. */
posix_acl_release(argp->acl_access);
posix_acl_release(argp->acl_default);
return resp->status;
return rpc_success;
out_drop_lock:
fh_unlock(fh);
@ -157,7 +157,7 @@ static __be32 nfsacld_proc_getattr(struct svc_rqst *rqstp)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
return rpc_success;
}
/*
@ -179,7 +179,7 @@ static __be32 nfsacld_proc_access(struct svc_rqst *rqstp)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
return rpc_success;
}
/*
@ -275,6 +275,7 @@ static int nfsaclsvc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
int n;
int w;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);
@ -317,10 +318,12 @@ static int nfsaclsvc_encode_attrstatres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd_attrstat *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);
goto out;
p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
out:
return xdr_ressize_check(rqstp, p);
}
@ -329,11 +332,13 @@ static int nfsaclsvc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_accessres *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);
goto out;
p = nfs2svc_encode_fattr(rqstp, p, &resp->fh, &resp->stat);
*p++ = htonl(resp->access);
out:
return xdr_ressize_check(rqstp, p);
}

9
fs/nfsd/nfs3acl.c
View File

@ -19,7 +19,7 @@
static __be32
nfsd3_proc_null(struct svc_rqst *rqstp)
{
return nfs_ok;
return rpc_success;
}
/*
@ -71,7 +71,7 @@ static __be32 nfsd3_proc_getacl(struct svc_rqst *rqstp)
/* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
out:
return resp->status;
return rpc_success;
fail:
posix_acl_release(resp->acl_access);
@ -118,7 +118,7 @@ static __be32 nfsd3_proc_setacl(struct svc_rqst *rqstp)
nfs3svc_decode_setaclargs. */
posix_acl_release(argp->acl_access);
posix_acl_release(argp->acl_default);
return resp->status;
return rpc_success;
}
/*
@ -173,6 +173,7 @@ static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
struct nfsd3_getaclres *resp = rqstp->rq_resp;
struct dentry *dentry = resp->fh.fh_dentry;
*p++ = resp->status;
p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
if (resp->status == 0 && dentry && d_really_is_positive(dentry)) {
struct inode *inode = d_inode(dentry);
@ -217,8 +218,8 @@ static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_attrstat *resp = rqstp->rq_resp;
*p++ = resp->status;
p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
return xdr_ressize_check(rqstp, p);
}

44
fs/nfsd/nfs3proc.c
View File

@ -32,7 +32,7 @@ static int nfs3_ftypes[] = {
static __be32
nfsd3_proc_null(struct svc_rqst *rqstp)
{
return nfs_ok;
return rpc_success;
}
/*
@ -55,7 +55,7 @@ nfsd3_proc_getattr(struct svc_rqst *rqstp)
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
return rpc_success;
}
/*
@ -73,7 +73,7 @@ nfsd3_proc_setattr(struct svc_rqst *rqstp)
fh_copy(&resp->fh, &argp->fh);
resp->status = nfsd_setattr(rqstp, &resp->fh, &argp->attrs,
argp->check_guard, argp->guardtime);
return resp->status;
return rpc_success;
}
/*
@ -96,7 +96,7 @@ nfsd3_proc_lookup(struct svc_rqst *rqstp)
resp->status = nfsd_lookup(rqstp, &resp->dirfh,
argp->name, argp->len,
&resp->fh);
return resp->status;
return rpc_success;
}
/*
@ -115,7 +115,7 @@ nfsd3_proc_access(struct svc_rqst *rqstp)
fh_copy(&resp->fh, &argp->fh);
resp->access = argp->access;
resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
return resp->status;
return rpc_success;
}
/*
@ -133,7 +133,7 @@ nfsd3_proc_readlink(struct svc_rqst *rqstp)
fh_copy(&resp->fh, &argp->fh);
resp->len = NFS3_MAXPATHLEN;
resp->status = nfsd_readlink(rqstp, &resp->fh, argp->buffer, &resp->len);
return resp->status;
return rpc_success;
}
/*
@ -163,7 +163,7 @@ nfsd3_proc_read(struct svc_rqst *rqstp)
resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
rqstp->rq_vec, argp->vlen, &resp->count,
&resp->eof);
return resp->status;
return rpc_success;
}
/*
@ -196,7 +196,7 @@ nfsd3_proc_write(struct svc_rqst *rqstp)
resp->committed, resp->verf);
resp->count = cnt;
out:
return resp->status;
return rpc_success;
}
/*
@ -234,7 +234,7 @@ nfsd3_proc_create(struct svc_rqst *rqstp)
resp->status = do_nfsd_create(rqstp, dirfhp, argp->name, argp->len,
attr, newfhp, argp->createmode,
(u32 *)argp->verf, NULL, NULL);
return resp->status;
return rpc_success;
}
/*
@ -257,7 +257,7 @@ nfsd3_proc_mkdir(struct svc_rqst *rqstp)
resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
&argp->attrs, S_IFDIR, 0, &resp->fh);
fh_unlock(&resp->dirfh);
return resp->status;
return rpc_success;
}
static __be32
@ -294,7 +294,7 @@ nfsd3_proc_symlink(struct svc_rqst *rqstp)
argp->flen, argp->tname, &resp->fh);
kfree(argp->tname);
out:
return resp->status;
return rpc_success;
}
/*
@ -337,7 +337,7 @@ nfsd3_proc_mknod(struct svc_rqst *rqstp)
&argp->attrs, type, rdev, &resp->fh);
fh_unlock(&resp->dirfh);
out:
return resp->status;
return rpc_success;
}
/*
@ -359,7 +359,7 @@ nfsd3_proc_remove(struct svc_rqst *rqstp)
resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
argp->name, argp->len);
fh_unlock(&resp->fh);
return resp->status;
return rpc_success;
}
/*
@ -380,7 +380,7 @@ nfsd3_proc_rmdir(struct svc_rqst *rqstp)
resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
argp->name, argp->len);
fh_unlock(&resp->fh);
return resp->status;
return rpc_success;
}
static __be32
@ -402,7 +402,7 @@ nfsd3_proc_rename(struct svc_rqst *rqstp)
fh_copy(&resp->tfh, &argp->tfh);
resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
&resp->tfh, argp->tname, argp->tlen);
return resp->status;
return rpc_success;
}
static __be32
@ -422,7 +422,7 @@ nfsd3_proc_link(struct svc_rqst *rqstp)
fh_copy(&resp->tfh, &argp->tfh);
resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
&resp->fh);
return resp->status;
return rpc_success;
}
/*
@ -481,7 +481,7 @@ nfsd3_proc_readdir(struct svc_rqst *rqstp)
resp->offset = NULL;
}
return resp->status;
return rpc_success;
}
/*
@ -551,7 +551,7 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
}
out:
return resp->status;
return rpc_success;
}
/*
@ -568,7 +568,7 @@ nfsd3_proc_fsstat(struct svc_rqst *rqstp)
resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
fh_put(&argp->fh);
return resp->status;
return rpc_success;
}
/*
@ -611,7 +611,7 @@ nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
}
fh_put(&argp->fh);
return resp->status;
return rpc_success;
}
/*
@ -653,7 +653,7 @@ nfsd3_proc_pathconf(struct svc_rqst *rqstp)
}
fh_put(&argp->fh);
return resp->status;
return rpc_success;
}
/*
@ -679,7 +679,7 @@ nfsd3_proc_commit(struct svc_rqst *rqstp)
resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
argp->count, resp->verf);
out:
return resp->status;
return rpc_success;
}

19
fs/nfsd/nfs3xdr.c
View File

@ -641,10 +641,7 @@ nfs3svc_decode_commitargs(struct svc_rqst *rqstp, __be32 *p)
/*
* XDR encode functions
*/
/*
* There must be an encoding function for void results so svc_process
* will work properly.
*/
int
nfs3svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p)
{
@ -657,6 +654,7 @@ nfs3svc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_attrstat *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status == 0) {
lease_get_mtime(d_inode(resp->fh.fh_dentry),
&resp->stat.mtime);
@ -671,6 +669,7 @@ nfs3svc_encode_wccstat(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_attrstat *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_wcc_data(rqstp, p, &resp->fh);
return xdr_ressize_check(rqstp, p);
}
@ -681,6 +680,7 @@ nfs3svc_encode_diropres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_diropres *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status == 0) {
p = encode_fh(p, &resp->fh);
p = encode_post_op_attr(rqstp, p, &resp->fh);
@ -695,6 +695,7 @@ nfs3svc_encode_accessres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_accessres *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_post_op_attr(rqstp, p, &resp->fh);
if (resp->status == 0)
*p++ = htonl(resp->access);
@ -707,6 +708,7 @@ nfs3svc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_readlinkres *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_post_op_attr(rqstp, p, &resp->fh);
if (resp->status == 0) {
*p++ = htonl(resp->len);
@ -729,6 +731,7 @@ nfs3svc_encode_readres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_readres *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_post_op_attr(rqstp, p, &resp->fh);
if (resp->status == 0) {
*p++ = htonl(resp->count);
@ -754,6 +757,7 @@ nfs3svc_encode_writeres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_writeres *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_wcc_data(rqstp, p, &resp->fh);
if (resp->status == 0) {
*p++ = htonl(resp->count);
@ -770,6 +774,7 @@ nfs3svc_encode_createres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_diropres *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status == 0) {
*p++ = xdr_one;
p = encode_fh(p, &resp->fh);
@ -785,6 +790,7 @@ nfs3svc_encode_renameres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_renameres *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_wcc_data(rqstp, p, &resp->ffh);
p = encode_wcc_data(rqstp, p, &resp->tfh);
return xdr_ressize_check(rqstp, p);
@ -796,6 +802,7 @@ nfs3svc_encode_linkres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_linkres *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_post_op_attr(rqstp, p, &resp->fh);
p = encode_wcc_data(rqstp, p, &resp->tfh);
return xdr_ressize_check(rqstp, p);
@ -807,6 +814,7 @@ nfs3svc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_readdirres *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_post_op_attr(rqstp, p, &resp->fh);
if (resp->status == 0) {
@ -1059,6 +1067,7 @@ nfs3svc_encode_fsstatres(struct svc_rqst *rqstp, __be32 *p)
struct kstatfs *s = &resp->stats;
u64 bs = s->f_bsize;
*p++ = resp->status;
*p++ = xdr_zero; /* no post_op_attr */
if (resp->status == 0) {
@ -1079,6 +1088,7 @@ nfs3svc_encode_fsinfores(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_fsinfores *resp = rqstp->rq_resp;
*p++ = resp->status;
*p++ = xdr_zero; /* no post_op_attr */
if (resp->status == 0) {
@ -1124,6 +1134,7 @@ nfs3svc_encode_commitres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd3_commitres *resp = rqstp->rq_resp;
*p++ = resp->status;
p = encode_wcc_data(rqstp, p, &resp->fh);
/* Write verifier */
if (resp->status == 0) {

7
fs/nfsd/nfs4proc.c
View File

@ -2165,7 +2165,7 @@ nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
static __be32
nfsd4_proc_null(struct svc_rqst *rqstp)
{
return nfs_ok;
return rpc_success;
}
static inline void nfsd4_increment_op_stats(u32 opnum)
@ -2457,15 +2457,14 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
nfsd4_increment_op_stats(op->opnum);
}
cstate->status = status;
fh_put(current_fh);
fh_put(save_fh);
BUG_ON(cstate->replay_owner);
out:
cstate->status = status;
/* Reset deferral mechanism for RPC deferrals */
set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
dprintk("nfsv4 compound returned %d\n", ntohl(status));
return status;
return rpc_success;
}
#define op_encode_hdr_size (2)

5
fs/nfsd/nfs4xdr.c
View File

@ -5167,15 +5167,14 @@ nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p)
int
nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p)
{
/*
* All that remains is to write the tag and operation count...
*/
struct nfsd4_compoundres *resp = rqstp->rq_resp;
struct xdr_buf *buf = resp->xdr.buf;
WARN_ON_ONCE(buf->len != buf->head[0].iov_len + buf->page_len +
buf->tail[0].iov_len);
*p = resp->cstate.status;
rqstp->rq_next_page = resp->xdr.page_ptr + 1;
p = resp->tagp;

113
fs/nfsd/nfsproc.c
View File

@ -16,7 +16,7 @@
static __be32
nfsd_proc_null(struct svc_rqst *rqstp)
{
return nfs_ok;
return rpc_success;
}
/*
@ -38,7 +38,7 @@ nfsd_proc_getattr(struct svc_rqst *rqstp)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
return rpc_success;
}
/*
@ -85,7 +85,7 @@ nfsd_proc_setattr(struct svc_rqst *rqstp)
resp->status = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP);
if (resp->status != nfs_ok)
return resp->status;
goto out;
if (delta < 0)
delta = -delta;
@ -106,14 +106,14 @@ nfsd_proc_setattr(struct svc_rqst *rqstp)
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
return rpc_success;
}
/* Obsolete, replaced by MNTPROC_MNT. */
static __be32
nfsd_proc_root(struct svc_rqst *rqstp)
{
return nfs_ok;
return rpc_success;
}
/*
@ -140,7 +140,7 @@ nfsd_proc_lookup(struct svc_rqst *rqstp)
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
return rpc_success;
}
/*
@ -159,7 +159,7 @@ nfsd_proc_readlink(struct svc_rqst *rqstp)
resp->status = nfsd_readlink(rqstp, &argp->fh, argp->buffer, &resp->len);
fh_put(&argp->fh);
return resp->status;
return rpc_success;
}
/*
@ -197,19 +197,18 @@ nfsd_proc_read(struct svc_rqst *rqstp)
rqstp->rq_vec, argp->vlen,
&resp->count,
&eof);
if (resp->status != nfs_ok)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
if (resp->status == nfs_ok)
resp->status = fh_getattr(&resp->fh, &resp->stat);
else if (resp->status == nfserr_jukebox)
return rpc_drop_reply;
return rpc_success;
}
/* Reserved */
static __be32
nfsd_proc_writecache(struct svc_rqst *rqstp)
{
return nfs_ok;
return rpc_success;
}
/*
@ -238,12 +237,12 @@ nfsd_proc_write(struct svc_rqst *rqstp)
resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh),
argp->offset, rqstp->rq_vec, nvecs,
&cnt, NFS_DATA_SYNC, NULL);
if (resp->status != nfs_ok)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
if (resp->status == nfs_ok)
resp->status = fh_getattr(&resp->fh, &resp->stat);
else if (resp->status == nfserr_jukebox)
return rpc_drop_reply;
out:
return resp->status;
return rpc_success;
}
/*
@ -410,47 +409,48 @@ nfsd_proc_create(struct svc_rqst *rqstp)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
return rpc_success;
}
static __be32
nfsd_proc_remove(struct svc_rqst *rqstp)
{
struct nfsd_diropargs *argp = rqstp->rq_argp;
__be32 nfserr;
struct nfsd_stat *resp = rqstp->rq_resp;
dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
argp->len, argp->name);
/* Unlink. -SIFDIR means file must not be a directory */
nfserr = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, argp->name, argp->len);
resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR,
argp->name, argp->len);
fh_put(&argp->fh);
return nfserr;
return rpc_success;
}
static __be32
nfsd_proc_rename(struct svc_rqst *rqstp)
{
struct nfsd_renameargs *argp = rqstp->rq_argp;
__be32 nfserr;
struct nfsd_stat *resp = rqstp->rq_resp;
dprintk("nfsd: RENAME %s %.*s -> \n",
SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
dprintk("nfsd: -> %s %.*s\n",
SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
nfserr = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
&argp->tfh, argp->tname, argp->tlen);
resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
&argp->tfh, argp->tname, argp->tlen);
fh_put(&argp->ffh);
fh_put(&argp->tfh);
return nfserr;
return rpc_success;
}
static __be32
nfsd_proc_link(struct svc_rqst *rqstp)
{
struct nfsd_linkargs *argp = rqstp->rq_argp;
__be32 nfserr;
struct nfsd_stat *resp = rqstp->rq_resp;
dprintk("nfsd: LINK %s ->\n",
SVCFH_fmt(&argp->ffh));
@ -459,22 +459,22 @@ nfsd_proc_link(struct svc_rqst *rqstp)
argp->tlen,
argp->tname);
nfserr = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
&argp->ffh);
resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
&argp->ffh);
fh_put(&argp->ffh);
fh_put(&argp->tfh);
return nfserr;
return rpc_success;
}
static __be32
nfsd_proc_symlink(struct svc_rqst *rqstp)
{
struct nfsd_symlinkargs *argp = rqstp->rq_argp;
struct nfsd_stat *resp = rqstp->rq_resp;
struct svc_fh newfh;
__be32 nfserr;
if (argp->tlen > NFS_MAXPATHLEN) {
nfserr = nfserr_nametoolong;
resp->status = nfserr_nametoolong;
goto out;
}
@ -482,7 +482,7 @@ nfsd_proc_symlink(struct svc_rqst *rqstp)
page_address(rqstp->rq_arg.pages[0]),
argp->tlen);
if (IS_ERR(argp->tname)) {
nfserr = nfserrno(PTR_ERR(argp->tname));
resp->status = nfserrno(PTR_ERR(argp->tname));
goto out;
}
@ -491,14 +491,14 @@ nfsd_proc_symlink(struct svc_rqst *rqstp)
argp->tlen, argp->tname);
fh_init(&newfh, NFS_FHSIZE);
nfserr = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
argp->tname, &newfh);
resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
argp->tname, &newfh);
kfree(argp->tname);
fh_put(&argp->ffh);
fh_put(&newfh);
out:
return nfserr;
return rpc_success;
}
/*
@ -528,7 +528,7 @@ nfsd_proc_mkdir(struct svc_rqst *rqstp)
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
return resp->status;
return rpc_success;
}
/*
@ -538,13 +538,14 @@ static __be32
nfsd_proc_rmdir(struct svc_rqst *rqstp)
{
struct nfsd_diropargs *argp = rqstp->rq_argp;
__be32 nfserr;
struct nfsd_stat *resp = rqstp->rq_resp;
dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
nfserr = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, argp->name, argp->len);
resp->status = nfsd_unlink(rqstp, &argp->fh, S_IFDIR,
argp->name, argp->len);
fh_put(&argp->fh);
return nfserr;
return rpc_success;
}
/*
@ -584,7 +585,7 @@ nfsd_proc_readdir(struct svc_rqst *rqstp)
*resp->offset = htonl(offset);
fh_put(&argp->fh);
return resp->status;
return rpc_success;
}
/*
@ -601,7 +602,7 @@ nfsd_proc_statfs(struct svc_rqst *rqstp)
resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats,
NFSD_MAY_BYPASS_GSS_ON_ROOT);
fh_put(&argp->fh);
return resp->status;
return rpc_success;
}
/*
@ -622,7 +623,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
.pc_argsize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_void),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
.pc_xdrressize = 0,
},
[NFSPROC_GETATTR] = {
.pc_func = nfsd_proc_getattr,
@ -651,7 +652,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
.pc_argsize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_void),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
.pc_xdrressize = 0,
},
[NFSPROC_LOOKUP] = {
.pc_func = nfsd_proc_lookup,
@ -689,7 +690,7 @@ static const struct svc_procedure nfsd_procedures2[18] = {
.pc_argsize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_void),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST,
.pc_xdrressize = 0,
},
[NFSPROC_WRITE] = {
.pc_func = nfsd_proc_write,
@ -714,36 +715,36 @@ static const struct svc_procedure nfsd_procedures2[18] = {
[NFSPROC_REMOVE] = {
.pc_func = nfsd_proc_remove,
.pc_decode = nfssvc_decode_diropargs,
.pc_encode = nfssvc_encode_void,
.pc_encode = nfssvc_encode_stat,
.pc_argsize = sizeof(struct nfsd_diropargs),
.pc_ressize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
},
[NFSPROC_RENAME] = {
.pc_func = nfsd_proc_rename,
.pc_decode = nfssvc_decode_renameargs,
.pc_encode = nfssvc_encode_void,
.pc_encode = nfssvc_encode_stat,
.pc_argsize = sizeof(struct nfsd_renameargs),
.pc_ressize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
},
[NFSPROC_LINK] = {
.pc_func = nfsd_proc_link,
.pc_decode = nfssvc_decode_linkargs,
.pc_encode = nfssvc_encode_void,
.pc_encode = nfssvc_encode_stat,
.pc_argsize = sizeof(struct nfsd_linkargs),
.pc_ressize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
},
[NFSPROC_SYMLINK] = {
.pc_func = nfsd_proc_symlink,
.pc_decode = nfssvc_decode_symlinkargs,
.pc_encode = nfssvc_encode_void,
.pc_encode = nfssvc_encode_stat,
.pc_argsize = sizeof(struct nfsd_symlinkargs),
.pc_ressize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
},
@ -760,9 +761,9 @@ static const struct svc_procedure nfsd_procedures2[18] = {
[NFSPROC_RMDIR] = {
.pc_func = nfsd_proc_rmdir,
.pc_decode = nfssvc_decode_diropargs,
.pc_encode = nfssvc_encode_void,
.pc_encode = nfssvc_encode_stat,
.pc_argsize = sizeof(struct nfsd_diropargs),
.pc_ressize = sizeof(struct nfsd_void),
.pc_ressize = sizeof(struct nfsd_stat),
.pc_cachetype = RC_REPLSTAT,
.pc_xdrressize = ST,
},

21
fs/nfsd/nfssvc.c
View File

@ -960,13 +960,6 @@ nfsd(void *vrqstp)
return 0;
}
static __be32 map_new_errors(u32 vers, __be32 nfserr)
{
if (nfserr == nfserr_jukebox && vers == 2)
return nfserr_dropit;
return nfserr;
}
/*
* A write procedure can have a large argument, and a read procedure can
* have a large reply, but no NFSv2 or NFSv3 procedure has argument and
@ -1014,7 +1007,7 @@ int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
const struct svc_procedure *proc = rqstp->rq_procinfo;
struct kvec *argv = &rqstp->rq_arg.head[0];
struct kvec *resv = &rqstp->rq_res.head[0];
__be32 nfserr, *nfserrp;
__be32 *p;
dprintk("nfsd_dispatch: vers %d proc %d\n",
rqstp->rq_vers, rqstp->rq_proc);
@ -1043,18 +1036,14 @@ int nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
* Need to grab the location to store the status, as
* NFSv4 does some encoding while processing
*/
nfserrp = resv->iov_base + resv->iov_len;
p = resv->iov_base + resv->iov_len;
resv->iov_len += sizeof(__be32);
nfserr = proc->pc_func(rqstp);
nfserr = map_new_errors(rqstp->rq_vers, nfserr);
if (nfserr == nfserr_dropit || test_bit(RQ_DROPME, &rqstp->rq_flags))
*statp = proc->pc_func(rqstp);
if (*statp == rpc_drop_reply || test_bit(RQ_DROPME, &rqstp->rq_flags))
goto out_update_drop;
if (rqstp->rq_proc != 0)
*nfserrp++ = nfserr;
if (!proc->pc_encode(rqstp, nfserrp))
if (!proc->pc_encode(rqstp, p))
goto out_encode_err;
nfsd_cache_update(rqstp, rqstp->rq_cachetype, statp + 1);

23
fs/nfsd/nfsxdr.c
View File

@ -429,15 +429,25 @@ nfssvc_encode_void(struct svc_rqst *rqstp, __be32 *p)
return xdr_ressize_check(rqstp, p);
}
int
nfssvc_encode_stat(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd_stat *resp = rqstp->rq_resp;
*p++ = resp->status;
return xdr_ressize_check(rqstp, p);
}
int
nfssvc_encode_attrstat(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd_attrstat *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);
goto out;
p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
out:
return xdr_ressize_check(rqstp, p);
}
@ -446,11 +456,12 @@ nfssvc_encode_diropres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd_diropres *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);
goto out;
p = encode_fh(p, &resp->fh);
p = encode_fattr(rqstp, p, &resp->fh, &resp->stat);
out:
return xdr_ressize_check(rqstp, p);
}
@ -459,6 +470,7 @@ nfssvc_encode_readlinkres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd_readlinkres *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);
@ -479,6 +491,7 @@ nfssvc_encode_readres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd_readres *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);
@ -502,6 +515,7 @@ nfssvc_encode_readdirres(struct svc_rqst *rqstp, __be32 *p)
{
struct nfsd_readdirres *resp = rqstp->rq_resp;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);
@ -520,6 +534,7 @@ nfssvc_encode_statfsres(struct svc_rqst *rqstp, __be32 *p)
struct nfsd_statfsres *resp = rqstp->rq_resp;
struct kstatfs *stat = &resp->stats;
*p++ = resp->status;
if (resp->status != nfs_ok)
return xdr_ressize_check(rqstp, p);

5
fs/nfsd/xdr.h
View File

@ -82,6 +82,10 @@ struct nfsd_readdirargs {
__be32 * buffer;
};
struct nfsd_stat {
__be32 status;
};
struct nfsd_attrstat {
__be32 status;
struct svc_fh fh;
@ -153,6 +157,7 @@ int nfssvc_decode_linkargs(struct svc_rqst *, __be32 *);
int nfssvc_decode_symlinkargs(struct svc_rqst *, __be32 *);
int nfssvc_decode_readdirargs(struct svc_rqst *, __be32 *);
int nfssvc_encode_void(struct svc_rqst *, __be32 *);
int nfssvc_encode_stat(struct svc_rqst *, __be32 *);
int nfssvc_encode_attrstat(struct svc_rqst *, __be32 *);
int nfssvc_encode_diropres(struct svc_rqst *, __be32 *);
int nfssvc_encode_readlinkres(struct svc_rqst *, __be32 *);