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fs/nfs/callback_xdr.c
25.8 KB
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/* * linux/fs/nfs/callback_xdr.c * * Copyright (C) 2004 Trond Myklebust * * NFSv4 callback encode/decode procedures */ |
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#include <linux/kernel.h> #include <linux/sunrpc/svc.h> #include <linux/nfs4.h> #include <linux/nfs_fs.h> |
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#include <linux/ratelimit.h> #include <linux/printk.h> |
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#include <linux/slab.h> |
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#include <linux/sunrpc/bc_xprt.h> |
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#include "nfs4_fs.h" |
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#include "callback.h" |
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#include "internal.h" |
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#include "nfs4session.h" |
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#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) |
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#if defined(CONFIG_NFS_V4_1) |
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#define CB_OP_LAYOUTRECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
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#define CB_OP_DEVICENOTIFY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
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#define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \ 4 + 1 + 3) |
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#define CB_OP_RECALLANY_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
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#define CB_OP_RECALLSLOT_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ) |
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#endif /* CONFIG_NFS_V4_1 */ |
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#define NFSDBG_FACILITY NFSDBG_CALLBACK |
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/* Internal error code */ #define NFS4ERR_RESOURCE_HDR 11050 |
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typedef __be32 (*callback_process_op_t)(void *, void *, struct cb_process_state *); |
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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 *); |
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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[]; |
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static __be32 nfs4_callback_null(struct svc_rqst *rqstp, void *argp, void *resp) |
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{ return htonl(NFS4_OK); } |
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static int nfs4_decode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
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{ return xdr_argsize_check(rqstp, p); } |
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static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy) |
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{ return xdr_ressize_check(rqstp, p); } |
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static __be32 *read_buf(struct xdr_stream *xdr, int nbytes) |
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{ |
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__be32 *p; |
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p = xdr_inline_decode(xdr, nbytes); if (unlikely(p == NULL)) |
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printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed! "); |
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return p; } |
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static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len, const char **str) |
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{ |
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__be32 *p; |
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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; } |
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static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh) |
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{ |
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__be32 *p; |
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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; } |
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static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap) |
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{ |
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__be32 *p; |
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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; } |
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static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid) |
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{ |
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__be32 *p; |
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p = read_buf(xdr, NFS4_STATEID_SIZE); |
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if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); |
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memcpy(stateid, p, NFS4_STATEID_SIZE); |
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return 0; } |
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static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound_hdr_arg *hdr) |
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{ |
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__be32 *p; |
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__be32 status; |
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status = decode_string(xdr, &hdr->taglen, &hdr->tag); if (unlikely(status != 0)) return status; /* We do not like overly long tags! */ |
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if (hdr->taglen > CB_OP_TAGLEN_MAXSZ - 12) { |
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printk("NFS: NFSv4 CALLBACK %s: client sent tag of length %u ", |
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__func__, hdr->taglen); |
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return htonl(NFS4ERR_RESOURCE); } p = read_buf(xdr, 12); if (unlikely(p == NULL)) return htonl(NFS4ERR_RESOURCE); |
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hdr->minorversion = ntohl(*p++); |
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/* Check for minor version support */ if (hdr->minorversion <= NFS4_MAX_MINOR_VERSION) { |
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hdr->cb_ident = ntohl(*p++); /* ignored by v4.1 and v4.2 */ |
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} else { |
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pr_warn_ratelimited("NFS: %s: NFSv4 server callback with " |
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"illegal minor version %u! ", __func__, hdr->minorversion); |
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return htonl(NFS4ERR_MINOR_VERS_MISMATCH); } |
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hdr->nops = ntohl(*p); |
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dprintk("%s: minorversion %d nops %d ", __func__, hdr->minorversion, hdr->nops); |
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return 0; } |
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static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op) |
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{ |
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__be32 *p; |
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p = read_buf(xdr, 4); if (unlikely(p == NULL)) |
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return htonl(NFS4ERR_RESOURCE_HDR); |
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*op = ntohl(*p); return 0; } |
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static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args) |
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{ |
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__be32 status; |
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status = decode_fh(xdr, &args->fh); if (unlikely(status != 0)) goto out; |
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args->addr = svc_addr(rqstp); |
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status = decode_bitmap(xdr, args->bitmap); out: |
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dprintk("%s: exit with status = %d ", __func__, ntohl(status)); |
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return status; } |
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static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args) |
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{ |
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__be32 *p; |
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__be32 status; |
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args->addr = svc_addr(rqstp); |
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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: |
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dprintk("%s: exit with status = %d ", __func__, ntohl(status)); |
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return status; |
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} |
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#if defined(CONFIG_NFS_V4_1) |
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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, |
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* as it is unusable and ignored with the other types. |
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*/ 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 ", __func__, args->cbl_layout_type, iomode, args->cbl_layoutchanged, args->cbl_recall_type); out: dprintk("%s: exit with status = %d ", __func__, ntohl(status)); return status; } |
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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; |
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if (n > ULONG_MAX / sizeof(*args->devs)) { status = htonl(NFS4ERR_BADXDR); goto out; } |
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args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL); |
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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 ", __func__, dev->cbd_notify_type, dev->cbd_layout_type, dev->cbd_immediate); } out: dprintk("%s: status %d ndevs %d ", __func__, ntohl(status), args->ndevs); return status; err: kfree(args->devs); goto out; } |
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static __be32 decode_sessionid(struct xdr_stream *xdr, |
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struct nfs4_sessionid *sid) { |
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__be32 *p; |
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int len = NFS4_MAX_SESSIONID_LEN; p = read_buf(xdr, len); if (unlikely(p == NULL)) |
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return htonl(NFS4ERR_RESOURCE); |
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memcpy(sid->data, p, len); return 0; } |
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static __be32 decode_rc_list(struct xdr_stream *xdr, |
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struct referring_call_list *rc_list) { |
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__be32 *p; |
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int i; |
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__be32 status; |
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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; |
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rc_list->rcl_refcalls = kmalloc_array(rc_list->rcl_nrefcalls, |
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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; } |
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static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp, |
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struct xdr_stream *xdr, struct cb_sequenceargs *args) { |
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__be32 *p; |
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int i; |
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__be32 status; |
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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; |
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args->csa_addr = svc_addr(rqstp); |
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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) { |
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args->csa_rclists = kmalloc_array(args->csa_nrclists, sizeof(*args->csa_rclists), GFP_KERNEL); |
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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]); |
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if (status) { args->csa_nrclists = i; |
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goto out_free; |
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} |
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} } status = 0; dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u " "highestslotid %u cachethis %d nrclists %u ", __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 ", __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; } |
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static __be32 decode_recallany_args(struct svc_rqst *rqstp, |
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struct xdr_stream *xdr, struct cb_recallanyargs *args) { |
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uint32_t bitmap[2]; __be32 *p, status; |
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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++); |
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status = decode_bitmap(xdr, bitmap); if (unlikely(status)) return status; args->craa_type_mask = bitmap[0]; |
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return 0; } |
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static __be32 decode_recallslot_args(struct svc_rqst *rqstp, |
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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); |
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args->crsa_target_highest_slotid = ntohl(*p++); |
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return 0; } |
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#endif /* CONFIG_NFS_V4_1 */ |
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static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str) |
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{ |
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__be32 *p; |
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|
520 521 522 523 524 525 526 527 528 529 |
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) |
5704fdeb4
|
530 |
static __be32 encode_attr_bitmap(struct xdr_stream *xdr, const uint32_t *bitmap, __be32 **savep) |
1da177e4c
|
531 |
{ |
5704fdeb4
|
532 533 |
__be32 bm[2]; __be32 *p; |
1da177e4c
|
534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 |
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; } |
e6f684f64
|
559 |
static __be32 encode_attr_change(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t change) |
1da177e4c
|
560 |
{ |
5704fdeb4
|
561 |
__be32 *p; |
1da177e4c
|
562 563 564 565 |
if (!(bitmap[0] & FATTR4_WORD0_CHANGE)) return 0; p = xdr_reserve_space(xdr, 8); |
90dc7d279
|
566 |
if (unlikely(!p)) |
1da177e4c
|
567 568 569 570 |
return htonl(NFS4ERR_RESOURCE); p = xdr_encode_hyper(p, change); return 0; } |
e6f684f64
|
571 |
static __be32 encode_attr_size(struct xdr_stream *xdr, const uint32_t *bitmap, uint64_t size) |
1da177e4c
|
572 |
{ |
5704fdeb4
|
573 |
__be32 *p; |
1da177e4c
|
574 575 576 577 |
if (!(bitmap[0] & FATTR4_WORD0_SIZE)) return 0; p = xdr_reserve_space(xdr, 8); |
90dc7d279
|
578 |
if (unlikely(!p)) |
1da177e4c
|
579 580 581 582 |
return htonl(NFS4ERR_RESOURCE); p = xdr_encode_hyper(p, size); return 0; } |
e6f684f64
|
583 |
static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time) |
1da177e4c
|
584 |
{ |
5704fdeb4
|
585 |
__be32 *p; |
1da177e4c
|
586 587 |
p = xdr_reserve_space(xdr, 12); |
90dc7d279
|
588 |
if (unlikely(!p)) |
1da177e4c
|
589 590 591 592 593 |
return htonl(NFS4ERR_RESOURCE); p = xdr_encode_hyper(p, time->tv_sec); *p = htonl(time->tv_nsec); return 0; } |
e6f684f64
|
594 |
static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4c
|
595 596 597 598 599 |
{ if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA)) return 0; return encode_attr_time(xdr,time); } |
e6f684f64
|
600 |
static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time) |
1da177e4c
|
601 602 603 604 605 |
{ if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY)) return 0; return encode_attr_time(xdr,time); } |
e6f684f64
|
606 |
static __be32 encode_compound_hdr_res(struct xdr_stream *xdr, struct cb_compound_hdr_res *hdr) |
1da177e4c
|
607 |
{ |
e6f684f64
|
608 |
__be32 status; |
1da177e4c
|
609 610 611 612 613 614 615 616 617 618 619 620 |
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; } |
e6f684f64
|
621 |
static __be32 encode_op_hdr(struct xdr_stream *xdr, uint32_t op, __be32 res) |
1da177e4c
|
622 |
{ |
5704fdeb4
|
623 |
__be32 *p; |
1da177e4c
|
624 625 626 |
p = xdr_reserve_space(xdr, 8); if (unlikely(p == NULL)) |
31d2b4356
|
627 |
return htonl(NFS4ERR_RESOURCE_HDR); |
1da177e4c
|
628 629 630 631 |
*p++ = htonl(op); *p = res; return 0; } |
e6f684f64
|
632 |
static __be32 encode_getattr_res(struct svc_rqst *rqstp, struct xdr_stream *xdr, const struct cb_getattrres *res) |
1da177e4c
|
633 |
{ |
5704fdeb4
|
634 |
__be32 *savep = NULL; |
e6f684f64
|
635 |
__be32 status = res->status; |
1da177e4c
|
636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 |
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: |
3110ff804
|
654 655 |
dprintk("%s: exit with status = %d ", __func__, ntohl(status)); |
1da177e4c
|
656 657 |
return status; } |
34bc47c94
|
658 |
#if defined(CONFIG_NFS_V4_1) |
9733f0d92
|
659 |
static __be32 encode_sessionid(struct xdr_stream *xdr, |
4aece6a19
|
660 661 |
const struct nfs4_sessionid *sid) { |
9733f0d92
|
662 |
__be32 *p; |
4aece6a19
|
663 664 665 666 667 668 669 670 671 |
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; } |
9733f0d92
|
672 |
static __be32 encode_cb_sequence_res(struct svc_rqst *rqstp, |
4aece6a19
|
673 674 675 |
struct xdr_stream *xdr, const struct cb_sequenceres *res) { |
9733f0d92
|
676 |
__be32 *p; |
e216c8c77
|
677 |
__be32 status = res->csr_status; |
4aece6a19
|
678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 |
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 ", __func__, ntohl(status)); return status; } |
34bc47c94
|
697 698 699 |
static __be32 preprocess_nfs41_op(int nop, unsigned int op_nr, struct callback_op **op) { |
281fe15dc
|
700 701 702 703 704 705 706 |
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); } |
34bc47c94
|
707 708 709 |
switch (op_nr) { case OP_CB_GETATTR: case OP_CB_RECALL: |
4aece6a19
|
710 |
case OP_CB_SEQUENCE: |
31f096077
|
711 |
case OP_CB_RECALL_ANY: |
b9efa1b27
|
712 |
case OP_CB_RECALL_SLOT: |
f2a625616
|
713 |
case OP_CB_LAYOUTRECALL: |
1be5683b0
|
714 |
case OP_CB_NOTIFY_DEVICEID: |
34bc47c94
|
715 716 |
*op = &callback_ops[op_nr]; break; |
34bc47c94
|
717 718 |
case OP_CB_NOTIFY: case OP_CB_PUSH_DELEG: |
34bc47c94
|
719 |
case OP_CB_RECALLABLE_OBJ_AVAIL: |
34bc47c94
|
720 721 722 723 724 725 726 727 728 729 |
case OP_CB_WANTS_CANCELLED: case OP_CB_NOTIFY_LOCK: return htonl(NFS4ERR_NOTSUPP); default: return htonl(NFS4ERR_OP_ILLEGAL); } return htonl(NFS_OK); } |
42acd0218
|
730 731 732 733 734 735 736 737 738 |
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 */ |
45d43c291
|
739 |
tbl->highest_used_slotid = NFS4_NO_SLOT; |
774d5f14e
|
740 |
nfs4_slot_tbl_drain_complete(tbl); |
42acd0218
|
741 742 |
spin_unlock(&tbl->slot_tbl_lock); } |
55a673990
|
743 |
static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd0218
|
744 |
{ |
45d43c291
|
745 |
if (cps->slotid != NFS4_NO_SLOT) |
55a673990
|
746 |
nfs4_callback_free_slot(cps->clp->cl_session); |
42acd0218
|
747 |
} |
34bc47c94
|
748 749 750 751 752 753 754 |
#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); } |
55a673990
|
755 |
static void nfs4_cb_free_slot(struct cb_process_state *cps) |
42acd0218
|
756 757 |
{ } |
34bc47c94
|
758 |
#endif /* CONFIG_NFS_V4_1 */ |
6b140b85d
|
759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 |
#ifdef CONFIG_NFS_V4_2 static __be32 preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) { __be32 status = preprocess_nfs41_op(nop, op_nr, op); if (status != htonl(NFS4ERR_OP_ILLEGAL)) return status; if (op_nr == OP_CB_OFFLOAD) return htonl(NFS4ERR_NOTSUPP); return htonl(NFS4ERR_OP_ILLEGAL); } #else /* CONFIG_NFS_V4_2 */ static __be32 preprocess_nfs42_op(int nop, unsigned int op_nr, struct callback_op **op) { return htonl(NFS4ERR_MINOR_VERS_MISMATCH); } #endif /* CONFIG_NFS_V4_2 */ |
34bc47c94
|
778 779 780 781 782 783 784 785 786 787 788 789 790 791 |
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); } |
459de2edb
|
792 |
static __be32 process_op(int nop, struct svc_rqst *rqstp, |
1da177e4c
|
793 |
struct xdr_stream *xdr_in, void *argp, |
c36fca52f
|
794 795 |
struct xdr_stream *xdr_out, void *resp, struct cb_process_state *cps) |
1da177e4c
|
796 |
{ |
a162a6b80
|
797 |
struct callback_op *op = &callback_ops[0]; |
31d2b4356
|
798 |
unsigned int op_nr; |
34bc47c94
|
799 |
__be32 status; |
1da177e4c
|
800 |
long maxlen; |
e6f684f64
|
801 |
__be32 res; |
1da177e4c
|
802 |
|
3110ff804
|
803 804 |
dprintk("%s: start ", __func__); |
1da177e4c
|
805 |
status = decode_op_hdr(xdr_in, &op_nr); |
31d2b4356
|
806 807 |
if (unlikely(status)) return status; |
1da177e4c
|
808 |
|
34bc47c94
|
809 810 |
dprintk("%s: minorversion=%d nop=%d op_nr=%u ", |
459de2edb
|
811 |
__func__, cps->minorversion, nop, op_nr); |
34bc47c94
|
812 |
|
6b140b85d
|
813 814 815 816 817 818 819 820 821 822 823 824 825 |
switch (cps->minorversion) { case 0: status = preprocess_nfs4_op(op_nr, &op); break; case 1: status = preprocess_nfs41_op(nop, op_nr, &op); break; case 2: status = preprocess_nfs42_op(nop, op_nr, &op); break; default: status = htonl(NFS4ERR_MINOR_VERS_MISMATCH); } |
34bc47c94
|
826 |
|
34bc47c94
|
827 828 |
if (status == htonl(NFS4ERR_OP_ILLEGAL)) op_nr = OP_CB_ILLEGAL; |
b92b30190
|
829 830 |
if (status) goto encode_hdr; |
31d2b4356
|
831 |
|
c36fca52f
|
832 833 |
if (cps->drc_status) { status = cps->drc_status; |
4911096f1
|
834 835 |
goto encode_hdr; } |
1da177e4c
|
836 837 |
maxlen = xdr_out->end - xdr_out->p; if (maxlen > 0 && maxlen < PAGE_SIZE) { |
e95e60dae
|
838 839 |
status = op->decode_args(rqstp, xdr_in, argp); if (likely(status == 0)) |
c36fca52f
|
840 |
status = op->process_op(argp, resp, cps); |
1da177e4c
|
841 842 |
} else status = htonl(NFS4ERR_RESOURCE); |
b92b30190
|
843 |
encode_hdr: |
1da177e4c
|
844 |
res = encode_op_hdr(xdr_out, op_nr, status); |
31d2b4356
|
845 846 |
if (unlikely(res)) return res; |
1da177e4c
|
847 848 |
if (op->encode_res != NULL && status == 0) status = op->encode_res(rqstp, xdr_out, resp); |
3110ff804
|
849 850 |
dprintk("%s: done, status = %d ", __func__, ntohl(status)); |
1da177e4c
|
851 852 853 854 855 856 |
return status; } /* * Decode, process and encode a COMPOUND */ |
7111c66e4
|
857 |
static __be32 nfs4_callback_compound(struct svc_rqst *rqstp, void *argp, void *resp) |
1da177e4c
|
858 |
{ |
3a6258e1f
|
859 860 |
struct cb_compound_hdr_arg hdr_arg = { 0 }; struct cb_compound_hdr_res hdr_res = { NULL }; |
1da177e4c
|
861 |
struct xdr_stream xdr_in, xdr_out; |
c36fca52f
|
862 863 864 865 |
__be32 *p, status; struct cb_process_state cps = { .drc_status = 0, .clp = NULL, |
45d43c291
|
866 |
.slotid = NFS4_NO_SLOT, |
9695c7057
|
867 |
.net = SVC_NET(rqstp), |
c36fca52f
|
868 |
}; |
3a6258e1f
|
869 |
unsigned int nops = 0; |
1da177e4c
|
870 |
|
3110ff804
|
871 872 |
dprintk("%s: start ", __func__); |
1da177e4c
|
873 874 |
xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base); |
5704fdeb4
|
875 |
p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len); |
1da177e4c
|
876 |
xdr_init_encode(&xdr_out, &rqstp->rq_res, p); |
3a6258e1f
|
877 878 879 |
status = decode_compound_hdr_arg(&xdr_in, &hdr_arg); if (status == __constant_htonl(NFS4ERR_RESOURCE)) return rpc_garbage_args; |
c36fca52f
|
880 |
if (hdr_arg.minorversion == 0) { |
9695c7057
|
881 |
cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident); |
778be232a
|
882 |
if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) |
c36fca52f
|
883 |
return rpc_drop_reply; |
778be232a
|
884 |
} |
c36fca52f
|
885 |
|
459de2edb
|
886 |
cps.minorversion = hdr_arg.minorversion; |
1da177e4c
|
887 888 |
hdr_res.taglen = hdr_arg.taglen; hdr_res.tag = hdr_arg.tag; |
3a6258e1f
|
889 890 |
if (encode_compound_hdr_res(&xdr_out, &hdr_res) != 0) return rpc_system_err; |
1da177e4c
|
891 |
|
3a6258e1f
|
892 |
while (status == 0 && nops != hdr_arg.nops) { |
459de2edb
|
893 894 |
status = process_op(nops, rqstp, &xdr_in, argp, &xdr_out, resp, &cps); |
1da177e4c
|
895 896 |
nops++; } |
3a6258e1f
|
897 |
|
31d2b4356
|
898 899 900 901 902 903 |
/* 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--; } |
1da177e4c
|
904 905 |
*hdr_res.status = status; *hdr_res.nops = htonl(nops); |
55a673990
|
906 |
nfs4_cb_free_slot(&cps); |
c36fca52f
|
907 |
nfs_put_client(cps.clp); |
3110ff804
|
908 909 |
dprintk("%s: done, status = %u ", __func__, ntohl(status)); |
1da177e4c
|
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 |
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, |
4aece6a19
|
930 931 |
}, #if defined(CONFIG_NFS_V4_1) |
f2a625616
|
932 933 934 935 936 937 |
[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, }, |
1be5683b0
|
938 939 940 941 942 943 |
[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, }, |
4aece6a19
|
944 945 946 947 948 949 |
[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, }, |
31f096077
|
950 951 952 953 954 |
[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, }, |
b9efa1b27
|
955 956 957 958 959 |
[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, }, |
4aece6a19
|
960 |
#endif /* CONFIG_NFS_V4_1 */ |
1da177e4c
|
961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 |
}; /* * 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, |
49697ee79
|
988 |
.vs_hidden = 1, |
1da177e4c
|
989 |
}; |
07bccc2dd
|
990 991 992 993 994 995 |
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, |
6070295ef
|
996 |
.vs_hidden = 1, |
07bccc2dd
|
997 |
}; |