999 строки
25 KiB
C
999 строки
25 KiB
C
/*
|
|
* linux/fs/nfs/callback_xdr.c
|
|
*
|
|
* Copyright (C) 2004 Trond Myklebust
|
|
*
|
|
* NFSv4 callback encode/decode procedures
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/sunrpc/svc.h>
|
|
#include <linux/nfs4.h>
|
|
#include <linux/nfs_fs.h>
|
|
#include <linux/ratelimit.h>
|
|
#include <linux/printk.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/sunrpc/bc_xprt.h>
|
|
#include "nfs4_fs.h"
|
|
#include "callback.h"
|
|
#include "internal.h"
|
|
|
|
#define CB_OP_TAGLEN_MAXSZ (512)
|
|
#define CB_OP_HDR_RES_MAXSZ (2 + CB_OP_TAGLEN_MAXSZ)
|
|
#define CB_OP_GETATTR_BITMAP_MAXSZ (4)
|
|
#define CB_OP_GETATTR_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
|
|
CB_OP_GETATTR_BITMAP_MAXSZ + \
|
|
2 + 2 + 3 + 3)
|
|
#define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
#define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
|
|
#define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
|
|
#define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
|
|
4 + 1 + 3)
|
|
#define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
|
|
#define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
#define NFSDBG_FACILITY NFSDBG_CALLBACK
|
|
|
|
/* Internal error code */
|
|
#define NFS4ERR_RESOURCE_HDR 11050
|
|
|
|
typedef __be32 (*callback_process_op_t)(void *, void *,
|
|
struct cb_process_state *);
|
|
typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *);
|
|
typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *);
|
|
|
|
|
|
struct callback_op {
|
|
callback_process_op_t process_op;
|
|
callback_decode_arg_t decode_args;
|
|
callback_encode_res_t encode_res;
|
|
long res_maxsize;
|
|
};
|
|
|
|
static struct callback_op callback_ops[];
|
|
|
|
static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp)
|
|
{
|
|
return htonl(NFS4_OK);
|
|
}
|
|
|
|
static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
|
|
{
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
|
|
{
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
static __be32 *read_buf(struct xdr_stream *xdr, int nbytes)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_inline_decode(xdr, nbytes);
|
|
if (unlikely(p == NULL))
|
|
printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n");
|
|
return p;
|
|
}
|
|
|
|
static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
*len = ntohl(*p);
|
|
|
|
if (*len != 0) {
|
|
p = read_buf(xdr, *len);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
*str = (const char *)p;
|
|
} else
|
|
*str = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
fh->size = ntohl(*p);
|
|
if (fh->size > NFS4_FHSIZE)
|
|
return htonl(NFS4ERR_BADHANDLE);
|
|
p = read_buf(xdr, fh->size);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
memcpy(&fh->data[0], p, fh->size);
|
|
memset(&fh->data[fh->size], 0, sizeof(fh->data) - fh->size);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
|
|
{
|
|
__be32 *p;
|
|
unsigned int attrlen;
|
|
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
attrlen = ntohl(*p);
|
|
p = read_buf(xdr, attrlen << 2);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
if (likely(attrlen > 0))
|
|
bitmap[0] = ntohl(*p++);
|
|
if (attrlen > 1)
|
|
bitmap[1] = ntohl(*p);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = read_buf(xdr, NFS4_STATEID_SIZE);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
memcpy(stateid, p, NFS4_STATEID_SIZE);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr)
|
|
{
|
|
__be32 *p;
|
|
__be32 status;
|
|
|
|
status = decode_string(xdr, &hdr->taglen, &hdr->tag);
|
|
if (unlikely(status != 0))
|
|
return status;
|
|
/* We do not like overly long tags! */
|
|
if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) {
|
|
printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u\n",
|
|
__func__, hdr->taglen);
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
}
|
|
p = read_buf(xdr, 12);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
hdr->minorversion = ntohl(*p++);
|
|
/* Check minor version is zero or one. */
|
|
if (hdr->minorversion <= 1) {
|
|
hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 */
|
|
} else {
|
|
pr_warn_ratelimited("NFS: %s: NFSv4 server callback with "
|
|
"illegal minor version %u!\n",
|
|
__func__, hdr->minorversion);
|
|
return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
|
|
}
|
|
hdr->nops = ntohl(*p);
|
|
dprintk("%s: minorversion %d nops %d\n", __func__,
|
|
hdr->minorversion, hdr->nops);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
|
|
{
|
|
__be32 *p;
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE_HDR);
|
|
*op = ntohl(*p);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args)
|
|
{
|
|
__be32 status;
|
|
|
|
status = decode_fh(xdr, &args->fh);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
args->addr = svc_addr(rqstp);
|
|
status = decode_bitmap(xdr, args->bitmap);
|
|
out:
|
|
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
|
|
return status;
|
|
}
|
|
|
|
static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args)
|
|
{
|
|
__be32 *p;
|
|
__be32 status;
|
|
|
|
args->addr = svc_addr(rqstp);
|
|
status = decode_stateid(xdr, &args->stateid);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL)) {
|
|
status = htonl(NFS4ERR_RESOURCE);
|
|
goto out;
|
|
}
|
|
args->truncate = ntohl(*p);
|
|
status = decode_fh(xdr, &args->fh);
|
|
out:
|
|
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
|
|
return status;
|
|
}
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
|
|
static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
struct cb_layoutrecallargs *args)
|
|
{
|
|
__be32 *p;
|
|
__be32 status = 0;
|
|
uint32_t iomode;
|
|
|
|
args->cbl_addr = svc_addr(rqstp);
|
|
p = read_buf(xdr, 4 * sizeof(uint32_t));
|
|
if (unlikely(p == NULL)) {
|
|
status = htonl(NFS4ERR_BADXDR);
|
|
goto out;
|
|
}
|
|
|
|
args->cbl_layout_type = ntohl(*p++);
|
|
/* Depite the spec's xdr, iomode really belongs in the FILE switch,
|
|
* as it is unusable and ignored with the other types.
|
|
*/
|
|
iomode = ntohl(*p++);
|
|
args->cbl_layoutchanged = ntohl(*p++);
|
|
args->cbl_recall_type = ntohl(*p++);
|
|
|
|
if (args->cbl_recall_type == RETURN_FILE) {
|
|
args->cbl_range.iomode = iomode;
|
|
status = decode_fh(xdr, &args->cbl_fh);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
|
|
p = read_buf(xdr, 2 * sizeof(uint64_t));
|
|
if (unlikely(p == NULL)) {
|
|
status = htonl(NFS4ERR_BADXDR);
|
|
goto out;
|
|
}
|
|
p = xdr_decode_hyper(p, &args->cbl_range.offset);
|
|
p = xdr_decode_hyper(p, &args->cbl_range.length);
|
|
status = decode_stateid(xdr, &args->cbl_stateid);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
} else if (args->cbl_recall_type == RETURN_FSID) {
|
|
p = read_buf(xdr, 2 * sizeof(uint64_t));
|
|
if (unlikely(p == NULL)) {
|
|
status = htonl(NFS4ERR_BADXDR);
|
|
goto out;
|
|
}
|
|
p = xdr_decode_hyper(p, &args->cbl_fsid.major);
|
|
p = xdr_decode_hyper(p, &args->cbl_fsid.minor);
|
|
} else if (args->cbl_recall_type != RETURN_ALL) {
|
|
status = htonl(NFS4ERR_BADXDR);
|
|
goto out;
|
|
}
|
|
dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n",
|
|
__func__,
|
|
args->cbl_layout_type, iomode,
|
|
args->cbl_layoutchanged, args->cbl_recall_type);
|
|
out:
|
|
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
|
|
return status;
|
|
}
|
|
|
|
static
|
|
__be32 decode_devicenotify_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
struct cb_devicenotifyargs *args)
|
|
{
|
|
__be32 *p;
|
|
__be32 status = 0;
|
|
u32 tmp;
|
|
int n, i;
|
|
args->ndevs = 0;
|
|
|
|
/* Num of device notifications */
|
|
p = read_buf(xdr, sizeof(uint32_t));
|
|
if (unlikely(p == NULL)) {
|
|
status = htonl(NFS4ERR_BADXDR);
|
|
goto out;
|
|
}
|
|
n = ntohl(*p++);
|
|
if (n <= 0)
|
|
goto out;
|
|
if (n > ULONG_MAX / sizeof(*args->devs)) {
|
|
status = htonl(NFS4ERR_BADXDR);
|
|
goto out;
|
|
}
|
|
|
|
args->devs = kmalloc(n * sizeof(*args->devs), GFP_KERNEL);
|
|
if (!args->devs) {
|
|
status = htonl(NFS4ERR_DELAY);
|
|
goto out;
|
|
}
|
|
|
|
/* Decode each dev notification */
|
|
for (i = 0; i < n; i++) {
|
|
struct cb_devicenotifyitem *dev = &args->devs[i];
|
|
|
|
p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE);
|
|
if (unlikely(p == NULL)) {
|
|
status = htonl(NFS4ERR_BADXDR);
|
|
goto err;
|
|
}
|
|
|
|
tmp = ntohl(*p++); /* bitmap size */
|
|
if (tmp != 1) {
|
|
status = htonl(NFS4ERR_INVAL);
|
|
goto err;
|
|
}
|
|
dev->cbd_notify_type = ntohl(*p++);
|
|
if (dev->cbd_notify_type != NOTIFY_DEVICEID4_CHANGE &&
|
|
dev->cbd_notify_type != NOTIFY_DEVICEID4_DELETE) {
|
|
status = htonl(NFS4ERR_INVAL);
|
|
goto err;
|
|
}
|
|
|
|
tmp = ntohl(*p++); /* opaque size */
|
|
if (((dev->cbd_notify_type == NOTIFY_DEVICEID4_CHANGE) &&
|
|
(tmp != NFS4_DEVICEID4_SIZE + 8)) ||
|
|
((dev->cbd_notify_type == NOTIFY_DEVICEID4_DELETE) &&
|
|
(tmp != NFS4_DEVICEID4_SIZE + 4))) {
|
|
status = htonl(NFS4ERR_INVAL);
|
|
goto err;
|
|
}
|
|
dev->cbd_layout_type = ntohl(*p++);
|
|
memcpy(dev->cbd_dev_id.data, p, NFS4_DEVICEID4_SIZE);
|
|
p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
|
|
|
|
if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) {
|
|
p = read_buf(xdr, sizeof(uint32_t));
|
|
if (unlikely(p == NULL)) {
|
|
status = htonl(NFS4ERR_BADXDR);
|
|
goto err;
|
|
}
|
|
dev->cbd_immediate = ntohl(*p++);
|
|
} else {
|
|
dev->cbd_immediate = 0;
|
|
}
|
|
|
|
args->ndevs++;
|
|
|
|
dprintk("%s: type %d layout 0x%x immediate %d\n",
|
|
__func__, dev->cbd_notify_type, dev->cbd_layout_type,
|
|
dev->cbd_immediate);
|
|
}
|
|
out:
|
|
dprintk("%s: status %d ndevs %d\n",
|
|
__func__, ntohl(status), args->ndevs);
|
|
return status;
|
|
err:
|
|
kfree(args->devs);
|
|
goto out;
|
|
}
|
|
|
|
static __be32 decode_sessionid(struct xdr_stream *xdr,
|
|
struct nfs4_sessionid *sid)
|
|
{
|
|
__be32 *p;
|
|
int len = NFS4_MAX_SESSIONID_LEN;
|
|
|
|
p = read_buf(xdr, len);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
|
|
memcpy(sid->data, p, len);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_rc_list(struct xdr_stream *xdr,
|
|
struct referring_call_list *rc_list)
|
|
{
|
|
__be32 *p;
|
|
int i;
|
|
__be32 status;
|
|
|
|
status = decode_sessionid(xdr, &rc_list->rcl_sessionid);
|
|
if (status)
|
|
goto out;
|
|
|
|
status = htonl(NFS4ERR_RESOURCE);
|
|
p = read_buf(xdr, sizeof(uint32_t));
|
|
if (unlikely(p == NULL))
|
|
goto out;
|
|
|
|
rc_list->rcl_nrefcalls = ntohl(*p++);
|
|
if (rc_list->rcl_nrefcalls) {
|
|
p = read_buf(xdr,
|
|
rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t));
|
|
if (unlikely(p == NULL))
|
|
goto out;
|
|
rc_list->rcl_refcalls = kmalloc(rc_list->rcl_nrefcalls *
|
|
sizeof(*rc_list->rcl_refcalls),
|
|
GFP_KERNEL);
|
|
if (unlikely(rc_list->rcl_refcalls == NULL))
|
|
goto out;
|
|
for (i = 0; i < rc_list->rcl_nrefcalls; i++) {
|
|
rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++);
|
|
rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++);
|
|
}
|
|
}
|
|
status = 0;
|
|
|
|
out:
|
|
return status;
|
|
}
|
|
|
|
static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
struct cb_sequenceargs *args)
|
|
{
|
|
__be32 *p;
|
|
int i;
|
|
__be32 status;
|
|
|
|
status = decode_sessionid(xdr, &args->csa_sessionid);
|
|
if (status)
|
|
goto out;
|
|
|
|
status = htonl(NFS4ERR_RESOURCE);
|
|
p = read_buf(xdr, 5 * sizeof(uint32_t));
|
|
if (unlikely(p == NULL))
|
|
goto out;
|
|
|
|
args->csa_addr = svc_addr(rqstp);
|
|
args->csa_sequenceid = ntohl(*p++);
|
|
args->csa_slotid = ntohl(*p++);
|
|
args->csa_highestslotid = ntohl(*p++);
|
|
args->csa_cachethis = ntohl(*p++);
|
|
args->csa_nrclists = ntohl(*p++);
|
|
args->csa_rclists = NULL;
|
|
if (args->csa_nrclists) {
|
|
args->csa_rclists = kmalloc(args->csa_nrclists *
|
|
sizeof(*args->csa_rclists),
|
|
GFP_KERNEL);
|
|
if (unlikely(args->csa_rclists == NULL))
|
|
goto out;
|
|
|
|
for (i = 0; i < args->csa_nrclists; i++) {
|
|
status = decode_rc_list(xdr, &args->csa_rclists[i]);
|
|
if (status)
|
|
goto out_free;
|
|
}
|
|
}
|
|
status = 0;
|
|
|
|
dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u "
|
|
"highestslotid %u cachethis %d nrclists %u\n",
|
|
__func__,
|
|
((u32 *)&args->csa_sessionid)[0],
|
|
((u32 *)&args->csa_sessionid)[1],
|
|
((u32 *)&args->csa_sessionid)[2],
|
|
((u32 *)&args->csa_sessionid)[3],
|
|
args->csa_sequenceid, args->csa_slotid,
|
|
args->csa_highestslotid, args->csa_cachethis,
|
|
args->csa_nrclists);
|
|
out:
|
|
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
|
|
return status;
|
|
|
|
out_free:
|
|
for (i = 0; i < args->csa_nrclists; i++)
|
|
kfree(args->csa_rclists[i].rcl_refcalls);
|
|
kfree(args->csa_rclists);
|
|
goto out;
|
|
}
|
|
|
|
static __be32 decode_recallany_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
struct cb_recallanyargs *args)
|
|
{
|
|
uint32_t bitmap[2];
|
|
__be32 *p, status;
|
|
|
|
args->craa_addr = svc_addr(rqstp);
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_BADXDR);
|
|
args->craa_objs_to_keep = ntohl(*p++);
|
|
status = decode_bitmap(xdr, bitmap);
|
|
if (unlikely(status))
|
|
return status;
|
|
args->craa_type_mask = bitmap[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
static __be32 decode_recallslot_args(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
struct cb_recallslotargs *args)
|
|
{
|
|
__be32 *p;
|
|
|
|
args->crsa_addr = svc_addr(rqstp);
|
|
p = read_buf(xdr, 4);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_BADXDR);
|
|
args->crsa_target_max_slots = ntohl(*p++);
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 4 + len);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
xdr_encode_opaque(p, str, len);
|
|
return 0;
|
|
}
|
|
|
|
#define CB_SUPPORTED_ATTR0 (FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE)
|
|
#define CB_SUPPORTED_ATTR1 (FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY)
|
|
static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep)
|
|
{
|
|
__be32 bm[2];
|
|
__be32 *p;
|
|
|
|
bm[0] = htonl(bitmap[0] & CB_SUPPORTED_ATTR0);
|
|
bm[1] = htonl(bitmap[1] & CB_SUPPORTED_ATTR1);
|
|
if (bm[1] != 0) {
|
|
p = xdr_reserve_space(xdr, 16);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
*p++ = htonl(2);
|
|
*p++ = bm[0];
|
|
*p++ = bm[1];
|
|
} else if (bm[0] != 0) {
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
*p++ = htonl(1);
|
|
*p++ = bm[0];
|
|
} else {
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
*p++ = htonl(0);
|
|
}
|
|
*savep = p;
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!(bitmap[0] & FATTR4_WORD0_CHANGE))
|
|
return 0;
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (unlikely(!p))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
p = xdr_encode_hyper(p, change);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size)
|
|
{
|
|
__be32 *p;
|
|
|
|
if (!(bitmap[0] & FATTR4_WORD0_SIZE))
|
|
return 0;
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (unlikely(!p))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
p = xdr_encode_hyper(p, size);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 12);
|
|
if (unlikely(!p))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
p = xdr_encode_hyper(p, time->tv_sec);
|
|
*p = htonl(time->tv_nsec);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
|
|
{
|
|
if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA))
|
|
return 0;
|
|
return encode_attr_time(xdr,time);
|
|
}
|
|
|
|
static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
|
|
{
|
|
if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY))
|
|
return 0;
|
|
return encode_attr_time(xdr,time);
|
|
}
|
|
|
|
static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr)
|
|
{
|
|
__be32 status;
|
|
|
|
hdr->status = xdr_reserve_space(xdr, 4);
|
|
if (unlikely(hdr->status == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
status = encode_string(xdr, hdr->taglen, hdr->tag);
|
|
if (unlikely(status != 0))
|
|
return status;
|
|
hdr->nops = xdr_reserve_space(xdr, 4);
|
|
if (unlikely(hdr->nops == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res)
|
|
{
|
|
__be32 *p;
|
|
|
|
p = xdr_reserve_space(xdr, 8);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE_HDR);
|
|
*p++ = htonl(op);
|
|
*p = res;
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res)
|
|
{
|
|
__be32 *savep = NULL;
|
|
__be32 status = res->status;
|
|
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_bitmap(xdr, res->bitmap, &savep);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_change(xdr, res->bitmap, res->change_attr);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_size(xdr, res->bitmap, res->size);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_ctime(xdr, res->bitmap, &res->ctime);
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
status = encode_attr_mtime(xdr, res->bitmap, &res->mtime);
|
|
*savep = htonl((unsigned int)((char *)xdr->p - (char *)(savep+1)));
|
|
out:
|
|
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
|
|
return status;
|
|
}
|
|
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
|
|
static __be32 encode_sessionid(struct xdr_stream *xdr,
|
|
const struct nfs4_sessionid *sid)
|
|
{
|
|
__be32 *p;
|
|
int len = NFS4_MAX_SESSIONID_LEN;
|
|
|
|
p = xdr_reserve_space(xdr, len);
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
|
|
memcpy(p, sid, len);
|
|
return 0;
|
|
}
|
|
|
|
static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr,
|
|
const struct cb_sequenceres *res)
|
|
{
|
|
__be32 *p;
|
|
unsigned status = res->csr_status;
|
|
|
|
if (unlikely(status != 0))
|
|
goto out;
|
|
|
|
encode_sessionid(xdr, &res->csr_sessionid);
|
|
|
|
p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t));
|
|
if (unlikely(p == NULL))
|
|
return htonl(NFS4ERR_RESOURCE);
|
|
|
|
*p++ = htonl(res->csr_sequenceid);
|
|
*p++ = htonl(res->csr_slotid);
|
|
*p++ = htonl(res->csr_highestslotid);
|
|
*p++ = htonl(res->csr_target_highestslotid);
|
|
out:
|
|
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
|
|
return status;
|
|
}
|
|
|
|
static __be32
|
|
preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
|
|
{
|
|
if (op_nr == OP_CB_SEQUENCE) {
|
|
if (nop != 0)
|
|
return htonl(NFS4ERR_SEQUENCE_POS);
|
|
} else {
|
|
if (nop == 0)
|
|
return htonl(NFS4ERR_OP_NOT_IN_SESSION);
|
|
}
|
|
|
|
switch (op_nr) {
|
|
case OP_CB_GETATTR:
|
|
case OP_CB_RECALL:
|
|
case OP_CB_SEQUENCE:
|
|
case OP_CB_RECALL_ANY:
|
|
case OP_CB_RECALL_SLOT:
|
|
case OP_CB_LAYOUTRECALL:
|
|
case OP_CB_NOTIFY_DEVICEID:
|
|
*op = &callback_ops[op_nr];
|
|
break;
|
|
|
|
case OP_CB_NOTIFY:
|
|
case OP_CB_PUSH_DELEG:
|
|
case OP_CB_RECALLABLE_OBJ_AVAIL:
|
|
case OP_CB_WANTS_CANCELLED:
|
|
case OP_CB_NOTIFY_LOCK:
|
|
return htonl(NFS4ERR_NOTSUPP);
|
|
|
|
default:
|
|
return htonl(NFS4ERR_OP_ILLEGAL);
|
|
}
|
|
|
|
return htonl(NFS_OK);
|
|
}
|
|
|
|
static void nfs4_callback_free_slot(struct nfs4_session *session)
|
|
{
|
|
struct nfs4_slot_table *tbl = &session->bc_slot_table;
|
|
|
|
spin_lock(&tbl->slot_tbl_lock);
|
|
/*
|
|
* Let the state manager know callback processing done.
|
|
* A single slot, so highest used slotid is either 0 or -1
|
|
*/
|
|
tbl->highest_used_slotid = NFS4_NO_SLOT;
|
|
nfs4_check_drain_bc_complete(session);
|
|
spin_unlock(&tbl->slot_tbl_lock);
|
|
}
|
|
|
|
static void nfs4_cb_free_slot(struct cb_process_state *cps)
|
|
{
|
|
if (cps->slotid != NFS4_NO_SLOT)
|
|
nfs4_callback_free_slot(cps->clp->cl_session);
|
|
}
|
|
|
|
#else /* CONFIG_NFS_V4_1 */
|
|
|
|
static __be32
|
|
preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op)
|
|
{
|
|
return htonl(NFS4ERR_MINOR_VERS_MISMATCH);
|
|
}
|
|
|
|
static void nfs4_cb_free_slot(struct cb_process_state *cps)
|
|
{
|
|
}
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
|
|
static __be32
|
|
preprocess_nfs4_op(unsigned int op_nr, struct callback_op **op)
|
|
{
|
|
switch (op_nr) {
|
|
case OP_CB_GETATTR:
|
|
case OP_CB_RECALL:
|
|
*op = &callback_ops[op_nr];
|
|
break;
|
|
default:
|
|
return htonl(NFS4ERR_OP_ILLEGAL);
|
|
}
|
|
|
|
return htonl(NFS_OK);
|
|
}
|
|
|
|
static __be32 process_op(uint32_t minorversion, int nop,
|
|
struct svc_rqst *rqstp,
|
|
struct xdr_stream *xdr_in, void *argp,
|
|
struct xdr_stream *xdr_out, void *resp,
|
|
struct cb_process_state *cps)
|
|
{
|
|
struct callback_op *op = &callback_ops[0];
|
|
unsigned int op_nr;
|
|
__be32 status;
|
|
long maxlen;
|
|
__be32 res;
|
|
|
|
dprintk("%s: start\n", __func__);
|
|
status = decode_op_hdr(xdr_in, &op_nr);
|
|
if (unlikely(status))
|
|
return status;
|
|
|
|
dprintk("%s: minorversion=%d nop=%d op_nr=%u\n",
|
|
__func__, minorversion, nop, op_nr);
|
|
|
|
status = minorversion ? preprocess_nfs41_op(nop, op_nr, &op) :
|
|
preprocess_nfs4_op(op_nr, &op);
|
|
if (status == htonl(NFS4ERR_OP_ILLEGAL))
|
|
op_nr = OP_CB_ILLEGAL;
|
|
if (status)
|
|
goto encode_hdr;
|
|
|
|
if (cps->drc_status) {
|
|
status = cps->drc_status;
|
|
goto encode_hdr;
|
|
}
|
|
|
|
maxlen = xdr_out->end - xdr_out->p;
|
|
if (maxlen > 0 && maxlen < PAGE_SIZE) {
|
|
status = op->decode_args(rqstp, xdr_in, argp);
|
|
if (likely(status == 0))
|
|
status = op->process_op(argp, resp, cps);
|
|
} else
|
|
status = htonl(NFS4ERR_RESOURCE);
|
|
|
|
encode_hdr:
|
|
res = encode_op_hdr(xdr_out, op_nr, status);
|
|
if (unlikely(res))
|
|
return res;
|
|
if (op->encode_res != NULL && status == 0)
|
|
status = op->encode_res(rqstp, xdr_out, resp);
|
|
dprintk("%s: done, status = %d\n", __func__, ntohl(status));
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Decode, process and encode a COMPOUND
|
|
*/
|
|
static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp)
|
|
{
|
|
struct cb_compound_hdr_arg hdr_arg = { 0 };
|
|
struct cb_compound_hdr_res hdr_res = { NULL };
|
|
struct xdr_stream xdr_in, xdr_out;
|
|
__be32 *p, status;
|
|
struct cb_process_state cps = {
|
|
.drc_status = 0,
|
|
.clp = NULL,
|
|
.slotid = NFS4_NO_SLOT,
|
|
.net = rqstp->rq_xprt->xpt_net,
|
|
};
|
|
unsigned int nops = 0;
|
|
|
|
dprintk("%s: start\n", __func__);
|
|
|
|
xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
|
|
|
|
p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
|
|
xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
|
|
|
|
status = decode_compound_hdr_arg(&xdr_in, &hdr_arg);
|
|
if (status == __constant_htonl(NFS4ERR_RESOURCE))
|
|
return rpc_garbage_args;
|
|
|
|
if (hdr_arg.minorversion == 0) {
|
|
cps.clp = nfs4_find_client_ident(rqstp->rq_xprt->xpt_net, hdr_arg.cb_ident);
|
|
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp))
|
|
return rpc_drop_reply;
|
|
}
|
|
|
|
hdr_res.taglen = hdr_arg.taglen;
|
|
hdr_res.tag = hdr_arg.tag;
|
|
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0)
|
|
return rpc_system_err;
|
|
|
|
while (status == 0 && nops != hdr_arg.nops) {
|
|
status = process_op(hdr_arg.minorversion, nops, rqstp,
|
|
&xdr_in, argp, &xdr_out, resp, &cps);
|
|
nops++;
|
|
}
|
|
|
|
/* Buffer overflow in decode_ops_hdr or encode_ops_hdr. Return
|
|
* resource error in cb_compound status without returning op */
|
|
if (unlikely(status == htonl(NFS4ERR_RESOURCE_HDR))) {
|
|
status = htonl(NFS4ERR_RESOURCE);
|
|
nops--;
|
|
}
|
|
|
|
*hdr_res.status = status;
|
|
*hdr_res.nops = htonl(nops);
|
|
nfs4_cb_free_slot(&cps);
|
|
nfs_put_client(cps.clp);
|
|
dprintk("%s: done, status = %u\n", __func__, ntohl(status));
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Define NFS4 callback COMPOUND ops.
|
|
*/
|
|
static struct callback_op callback_ops[] = {
|
|
[0] = {
|
|
.res_maxsize = CB_OP_HDR_RES_MAXSZ,
|
|
},
|
|
[OP_CB_GETATTR] = {
|
|
.process_op = (callback_process_op_t)nfs4_callback_getattr,
|
|
.decode_args = (callback_decode_arg_t)decode_getattr_args,
|
|
.encode_res = (callback_encode_res_t)encode_getattr_res,
|
|
.res_maxsize = CB_OP_GETATTR_RES_MAXSZ,
|
|
},
|
|
[OP_CB_RECALL] = {
|
|
.process_op = (callback_process_op_t)nfs4_callback_recall,
|
|
.decode_args = (callback_decode_arg_t)decode_recall_args,
|
|
.res_maxsize = CB_OP_RECALL_RES_MAXSZ,
|
|
},
|
|
#if defined(CONFIG_NFS_V4_1)
|
|
[OP_CB_LAYOUTRECALL] = {
|
|
.process_op = (callback_process_op_t)nfs4_callback_layoutrecall,
|
|
.decode_args =
|
|
(callback_decode_arg_t)decode_layoutrecall_args,
|
|
.res_maxsize = CB_OP_LAYOUTRECALL_RES_MAXSZ,
|
|
},
|
|
[OP_CB_NOTIFY_DEVICEID] = {
|
|
.process_op = (callback_process_op_t)nfs4_callback_devicenotify,
|
|
.decode_args =
|
|
(callback_decode_arg_t)decode_devicenotify_args,
|
|
.res_maxsize = CB_OP_DEVICENOTIFY_RES_MAXSZ,
|
|
},
|
|
[OP_CB_SEQUENCE] = {
|
|
.process_op = (callback_process_op_t)nfs4_callback_sequence,
|
|
.decode_args = (callback_decode_arg_t)decode_cb_sequence_args,
|
|
.encode_res = (callback_encode_res_t)encode_cb_sequence_res,
|
|
.res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ,
|
|
},
|
|
[OP_CB_RECALL_ANY] = {
|
|
.process_op = (callback_process_op_t)nfs4_callback_recallany,
|
|
.decode_args = (callback_decode_arg_t)decode_recallany_args,
|
|
.res_maxsize = CB_OP_RECALLANY_RES_MAXSZ,
|
|
},
|
|
[OP_CB_RECALL_SLOT] = {
|
|
.process_op = (callback_process_op_t)nfs4_callback_recallslot,
|
|
.decode_args = (callback_decode_arg_t)decode_recallslot_args,
|
|
.res_maxsize = CB_OP_RECALLSLOT_RES_MAXSZ,
|
|
},
|
|
#endif /* CONFIG_NFS_V4_1 */
|
|
};
|
|
|
|
/*
|
|
* Define NFS4 callback procedures
|
|
*/
|
|
static struct svc_procedure nfs4_callback_procedures1[] = {
|
|
[CB_NULL] = {
|
|
.pc_func = nfs4_callback_null,
|
|
.pc_decode = (kxdrproc_t)nfs4_decode_void,
|
|
.pc_encode = (kxdrproc_t)nfs4_encode_void,
|
|
.pc_xdrressize = 1,
|
|
},
|
|
[CB_COMPOUND] = {
|
|
.pc_func = nfs4_callback_compound,
|
|
.pc_encode = (kxdrproc_t)nfs4_encode_void,
|
|
.pc_argsize = 256,
|
|
.pc_ressize = 256,
|
|
.pc_xdrressize = NFS4_CALLBACK_BUFSIZE,
|
|
}
|
|
};
|
|
|
|
struct svc_version nfs4_callback_version1 = {
|
|
.vs_vers = 1,
|
|
.vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
|
|
.vs_proc = nfs4_callback_procedures1,
|
|
.vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
|
|
.vs_dispatch = NULL,
|
|
.vs_hidden = 1,
|
|
};
|
|
|
|
struct svc_version nfs4_callback_version4 = {
|
|
.vs_vers = 4,
|
|
.vs_nproc = ARRAY_SIZE(nfs4_callback_procedures1),
|
|
.vs_proc = nfs4_callback_procedures1,
|
|
.vs_xdrsize = NFS4_CALLBACK_XDRSIZE,
|
|
.vs_dispatch = NULL,
|
|
.vs_hidden = 1,
|
|
};
|