diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/nfs/callback_xdr.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/nfs/callback_xdr.c | 998 |
1 files changed, 0 insertions, 998 deletions
diff --git a/ANDROID_3.4.5/fs/nfs/callback_xdr.c b/ANDROID_3.4.5/fs/nfs/callback_xdr.c deleted file mode 100644 index 95bfc243..00000000 --- a/ANDROID_3.4.5/fs/nfs/callback_xdr.c +++ /dev/null @@ -1,998 +0,0 @@ -/* - * 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, -}; |