diff options
Diffstat (limited to 'fs/nfs/nfs3xdr.c')
| -rw-r--r-- | fs/nfs/nfs3xdr.c | 1524 |
1 files changed, 1445 insertions, 79 deletions
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c index 119844d..0f07c6d 100644 --- a/fs/nfs/nfs3xdr.c +++ b/fs/nfs/nfs3xdr.c @@ -104,13 +104,6 @@ static const umode_t nfs_type2fmt[] = { [NF3FIFO] = S_IFIFO, }; -static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) -{ - dprintk("nfs: %s: prematurely hit end of receive buffer. " - "Remaining buffer length is %tu words.\n", - func, xdr->end - xdr->p); -} - /* * While encoding arguments, set up the reply buffer in advance to * receive reply data directly into the page cache. @@ -126,6 +119,16 @@ static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages, xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len); } +/* + * Handle decode buffer overflows out-of-line. + */ +static void print_overflow_msg(const char *func, const struct xdr_stream *xdr) +{ + dprintk("NFS: %s prematurely hit the end of our receive buffer. " + "Remaining buffer length is %tu words.\n", + func, xdr->end - xdr->p); +} + /* * Common NFS XDR functions as inlines @@ -284,6 +287,44 @@ static void encode_uint32(struct xdr_stream *xdr, u32 value) *p = cpu_to_be32(value); } +static int decode_uint32(struct xdr_stream *xdr, u32 *value) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + *value = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int decode_uint64(struct xdr_stream *xdr, u64 *value) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 8); + if (unlikely(p == NULL)) + goto out_overflow; + xdr_decode_hyper(p, value); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * fileid3 + * + * typedef uint64 fileid3; + */ +static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) +{ + return decode_uint64(xdr, fileid); +} + /* * filename3 * @@ -299,6 +340,33 @@ static void encode_filename3(struct xdr_stream *xdr, xdr_encode_opaque(p, name, length); } +static int decode_inline_filename3(struct xdr_stream *xdr, + const char **name, u32 *length) +{ + __be32 *p; + u32 count; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + if (count > NFS3_MAXNAMLEN) + goto out_nametoolong; + p = xdr_inline_decode(xdr, count); + if (unlikely(p == NULL)) + goto out_overflow; + *name = (const char *)p; + *length = count; + return 0; + +out_nametoolong: + dprintk("NFS: returned filename too long: %u\n", count); + return -ENAMETOOLONG; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + /* * nfspath3 * @@ -312,6 +380,39 @@ static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, xdr_write_pages(xdr, pages, 0, length); } +static int decode_nfspath3(struct xdr_stream *xdr) +{ + u32 recvd, count; + size_t hdrlen; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p); + if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) + goto out_nametoolong; + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(count > recvd)) + goto out_cheating; + + xdr_read_pages(xdr, count); + xdr_terminate_string(xdr->buf, count); + return 0; + +out_nametoolong: + dprintk("NFS: returned pathname too long: %u\n", count); + return -ENAMETOOLONG; +out_cheating: + dprintk("NFS: server cheating in pathname result: " + "count %u > recvd %u\n", count, recvd); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + /* * cookie3 * @@ -322,6 +423,11 @@ static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) return xdr_encode_hyper(p, cookie); } +static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) +{ + return decode_uint64(xdr, cookie); +} + /* * cookieverf3 * @@ -333,6 +439,20 @@ static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); } +static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + memcpy(verifier, p, NFS3_COOKIEVERFSIZE); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + /* * createverf3 * @@ -346,6 +466,54 @@ static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) memcpy(p, verifier, NFS3_CREATEVERFSIZE); } +static int decode_writeverf3(struct xdr_stream *xdr, __be32 *verifier) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + memcpy(verifier, p, NFS3_WRITEVERFSIZE); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * size3 + * + * typedef uint64 size3; + */ +static __be32 *xdr_decode_size3(__be32 *p, u64 *size) +{ + return xdr_decode_hyper(p, size); +} + +/* + * nfsstat3 + * + * enum nfsstat3 { + * NFS3_OK = 0, + * ... + * } + */ +#define NFS3_OK NFS_OK + +static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + *status = be32_to_cpup(p); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + /* * ftype3 * @@ -398,6 +566,36 @@ static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) xdr_encode_opaque(p, fh->data, fh->size); } +static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) +{ + u32 length; + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + length = be32_to_cpup(p++); + if (unlikely(length > NFS3_FHSIZE)) + goto out_toobig; + p = xdr_inline_decode(xdr, length); + if (unlikely(p == NULL)) + goto out_overflow; + fh->size = length; + memcpy(fh->data, p, length); + return 0; +out_toobig: + dprintk("NFS: file handle size (%u) too big\n", length); + return -E2BIG; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static void zero_nfs_fh3(struct nfs_fh *fh) +{ + memset(fh, 0, sizeof(*fh)); +} + /* * nfstime3 * @@ -541,6 +739,153 @@ static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr) } /* + * fattr3 + * + * struct fattr3 { + * ftype3 type; + * mode3 mode; + * uint32 nlink; + * uid3 uid; + * gid3 gid; + * size3 size; + * size3 used; + * specdata3 rdev; + * uint64 fsid; + * fileid3 fileid; + * nfstime3 atime; + * nfstime3 mtime; + * nfstime3 ctime; + * }; + */ +static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + xdr_decode_fattr(p, fattr); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * post_op_attr + * + * union post_op_attr switch (bool attributes_follow) { + * case TRUE: + * fattr3 attributes; + * case FALSE: + * void; + * }; + */ +static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) + return decode_fattr3(xdr, fattr); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * wcc_attr + * struct wcc_attr { + * size3 size; + * nfstime3 mtime; + * nfstime3 ctime; + * }; + */ +static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2); + if (unlikely(p == NULL)) + goto out_overflow; + xdr_decode_wcc_attr(p, fattr); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* + * pre_op_attr + * union pre_op_attr switch (bool attributes_follow) { + * case TRUE: + * wcc_attr attributes; + * case FALSE: + * void; + * }; + * + * wcc_data + * + * struct wcc_data { + * pre_op_attr before; + * post_op_attr after; + * }; + */ +static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) + return decode_wcc_attr(xdr, fattr); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr) +{ + int error; + + error = decode_pre_op_attr(xdr, fattr); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, fattr); +out: + return error; +} + +/* + * post_op_fh3 + * + * union post_op_fh3 switch (bool handle_follows) { + * case TRUE: + * nfs_fh3 handle; + * case FALSE: + * void; + * }; + */ +static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) +{ + __be32 *p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) + return decode_nfs_fh3(xdr, fh); + zero_nfs_fh3(fh); + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +/* * diropargs3 * * struct diropargs3 { @@ -1108,78 +1453,6 @@ nfs3_xdr_readdirres(struct rpc_rqst *req, __be32 *p, struct nfs3_readdirres *res return pglen; } -__be32 * -nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, struct nfs_server *server, int plus) -{ - __be32 *p; - struct nfs_entry old = *entry; - - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (!ntohl(*p++)) { - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (!ntohl(*p++)) - return ERR_PTR(-EAGAIN); - entry->eof = 1; - return ERR_PTR(-EBADCOOKIE); - } - - p = xdr_inline_decode(xdr, 12); - if (unlikely(!p)) - goto out_overflow; - p = xdr_decode_hyper(p, &entry->ino); - entry->len = ntohl(*p++); - - p = xdr_inline_decode(xdr, entry->len + 8); - if (unlikely(!p)) - goto out_overflow; - entry->name = (const char *) p; - p += XDR_QUADLEN(entry->len); - entry->prev_cookie = entry->cookie; - p = xdr_decode_hyper(p, &entry->cookie); - - entry->d_type = DT_UNKNOWN; - if (plus) { - entry->fattr->valid = 0; - p = xdr_decode_post_op_attr_stream(xdr, entry->fattr); - if (IS_ERR(p)) - goto out_overflow_exit; - entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); - /* In fact, a post_op_fh3: */ - p = xdr_inline_decode(xdr, 4); - if (unlikely(!p)) - goto out_overflow; - if (*p++) { - p = xdr_decode_fhandle_stream(xdr, entry->fh); - if (IS_ERR(p)) - goto out_overflow_exit; - /* Ugh -- server reply was truncated */ - if (p == NULL) { - dprintk("NFS: FH truncated\n"); - *entry = old; - return ERR_PTR(-EAGAIN); - } - } else - memset((u8*)(entry->fh), 0, sizeof(*entry->fh)); - } - - p = xdr_inline_peek(xdr, 8); - if (p != NULL) - entry->eof = !p[0] && p[1]; - else - entry->eof = 0; - - return p; - -out_overflow: - print_overflow_msg(__func__, xdr); -out_overflow_exit: - return ERR_PTR(-EAGAIN); -} - /* * 3.3.21 COMMIT3args * @@ -1275,6 +1548,40 @@ nfs3_xdr_attrstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) } /* + * 3.3.1 GETATTR3res + * + * struct GETATTR3resok { + * fattr3 obj_attributes; + * }; + * + * union GETATTR3res switch (nfsstat3 status) { + * case NFS3_OK: + * GETATTR3resok resok; + * default: + * void; + * }; + */ +static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req, __be32 *p, + struct nfs_fattr *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_fattr3(&xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} + +/* * Decode status+wcc_data reply * SATTR, REMOVE, RMDIR */ @@ -1289,6 +1596,46 @@ nfs3_xdr_wccstat(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) return status; } +/* + * 3.3.2 SETATTR3res + * + * struct SETATTR3resok { + * wcc_data obj_wcc; + * }; + * + * struct SETATTR3resfail { + * wcc_data obj_wcc; + * }; + * + * union SETATTR3res switch (nfsstat3 status) { + * case NFS3_OK: + * SETATTR3resok resok; + * default: + * SETATTR3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req, __be32 *p, + struct nfs_fattr *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(&xdr, result); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + static int nfs3_xdr_removeres(struct rpc_rqst *req, __be32 *p, struct nfs_removeres *res) { @@ -1315,6 +1662,55 @@ nfs3_xdr_lookupres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) } /* + * 3.3.3 LOOKUP3res + * + * struct LOOKUP3resok { + * nfs_fh3 object; + * post_op_attr obj_attributes; + * post_op_attr dir_attributes; + * }; + * + * struct LOOKUP3resfail { + * post_op_attr dir_attributes; + * }; + * + * union LOOKUP3res switch (nfsstat3 status) { + * case NFS3_OK: + * LOOKUP3resok resok; + * default: + * LOOKUP3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req, __be32 *p, + struct nfs3_diropres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_nfs_fh3(&xdr, result->fh); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result->dir_attr); +out: + return error; +out_default: + error = decode_post_op_attr(&xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs_stat_to_errno(status); +} + +/* * Decode ACCESS reply */ static int @@ -1330,6 +1726,48 @@ nfs3_xdr_accessres(struct rpc_rqst *req, __be32 *p, struct nfs3_accessres *res) } /* + * 3.3.4 ACCESS3res + * + * struct ACCESS3resok { + * post_op_attr obj_attributes; + * uint32 access; + * }; + * + * struct ACCESS3resfail { + * post_op_attr obj_attributes; + * }; + * + * union ACCESS3res switch (nfsstat3 status) { + * case NFS3_OK: + * ACCESS3resok resok; + * default: + * ACCESS3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_access3res(struct rpc_rqst *req, __be32 *p, + struct nfs3_accessres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_uint32(&xdr, &result->access); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} + +/* * Decode READLINK reply */ static int @@ -1376,6 +1814,48 @@ nfs3_xdr_readlinkres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) } /* + * 3.3.5 READLINK3res + * + * struct READLINK3resok { + * post_op_attr symlink_attributes; + * nfspath3 data; + * }; + * + * struct READLINK3resfail { + * post_op_attr symlink_attributes; + * }; + * + * union READLINK3res switch (nfsstat3 status) { + * case NFS3_OK: + * READLINK3resok resok; + * default: + * READLINK3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req, __be32 *p, + struct nfs_fattr *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_nfspath3(&xdr); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} + +/* * Decode READ reply */ static int @@ -1429,6 +1909,90 @@ nfs3_xdr_readres(struct rpc_rqst *req, __be32 *p, struct nfs_readres *res) } /* + * 3.3.6 READ3res + * + * struct READ3resok { + * post_op_attr file_attributes; + * count3 count; + * bool eof; + * opaque data<>; + * }; + * + * struct READ3resfail { + * post_op_attr file_attributes; + * }; + * + * union READ3res switch (nfsstat3 status) { + * case NFS3_OK: + * READ3resok resok; + * default: + * READ3resfail resfail; + * }; + */ +static int decode_read3resok(struct xdr_stream *xdr, + struct nfs_readres *result) +{ + u32 eof, count, ocount, recvd; + size_t hdrlen; + __be32 *p; + + p = xdr_inline_decode(xdr, 4 + 4 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + count = be32_to_cpup(p++); + eof = be32_to_cpup(p++); + ocount = be32_to_cpup(p++); + if (unlikely(ocount != count)) + goto out_mismatch; + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(count > recvd)) + goto out_cheating; + +out: + xdr_read_pages(xdr, count); + result->eof = eof; + result->count = count; + return count; +out_mismatch: + dprintk("NFS: READ count doesn't match length of opaque: " + "count %u != ocount %u\n", count, ocount); + return -EIO; +out_cheating: + dprintk("NFS: server cheating in read result: " + "count %u > recvd %u\n", count, recvd); + count = recvd; + eof = 0; + goto out; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, __be32 *p, + struct nfs_readres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_read3resok(&xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + +/* * Decode WRITE response */ static int @@ -1451,6 +2015,78 @@ nfs3_xdr_writeres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) } /* + * 3.3.7 WRITE3res + * + * enum stable_how { + * UNSTABLE = 0, + * DATA_SYNC = 1, + * FILE_SYNC = 2 + * }; + * + * struct WRITE3resok { + * wcc_data file_wcc; + * count3 count; + * stable_how committed; + * writeverf3 verf; + * }; + * + * struct WRITE3resfail { + * wcc_data file_wcc; + * }; + * + * union WRITE3res switch (nfsstat3 status) { + * case NFS3_OK: + * WRITE3resok resok; + * default: + * WRITE3resfail resfail; + * }; + */ +static int decode_write3resok(struct xdr_stream *xdr, + struct nfs_writeres *result) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4 + 4 + NFS3_WRITEVERFSIZE); + if (unlikely(p == NULL)) + goto out_overflow; + result->count = be32_to_cpup(p++); + result->verf->committed = be32_to_cpup(p++); + if (unlikely(result->verf->committed > NFS_FILE_SYNC)) + goto out_badvalue; + memcpy(result->verf->verifier, p, NFS3_WRITEVERFSIZE); + return result->count; +out_badvalue: + dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); + return -EIO; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, __be32 *p, + struct nfs_writeres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(&xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_write3resok(&xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + +/* * Decode a CREATE response */ static int @@ -1478,6 +2114,111 @@ nfs3_xdr_createres(struct rpc_rqst *req, __be32 *p, struct nfs3_diropres *res) } /* + * 3.3.8 CREATE3res + * + * struct CREATE3resok { + * post_op_fh3 obj; + * post_op_attr obj_attributes; + * wcc_data dir_wcc; + * }; + * + * struct CREATE3resfail { + * wcc_data dir_wcc; + * }; + * + * union CREATE3res switch (nfsstat3 status) { + * case NFS3_OK: + * CREATE3resok resok; + * default: + * CREATE3resfail resfail; + * }; + */ +static int decode_create3resok(struct xdr_stream *xdr, + struct nfs3_diropres *result) +{ + int error; + + error = decode_post_op_fh3(xdr, result->fh); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + /* The server isn't required to return a file handle. + * If it didn't, force the client to perform a LOOKUP + * to determine the correct file handle and attribute + * values for the new object. */ + if (result->fh->size == 0) + result->fattr->valid = 0; + error = decode_wcc_data(xdr, result->dir_attr); +out: + return error; +} + +static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, __be32 *p, + struct nfs3_diropres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_create3resok(&xdr, result); +out: + return error; +out_default: + error = decode_wcc_data(&xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs_stat_to_errno(status); +} + +/* + * 3.3.12 REMOVE3res + * + * struct REMOVE3resok { + * wcc_data dir_wcc; + * }; + * + * struct REMOVE3resfail { + * wcc_data dir_wcc; + * }; + * + * union REMOVE3res switch (nfsstat3 status) { + * case NFS3_OK: + * REMOVE3resok resok; + * default: + * REMOVE3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req, __be32 *p, + struct nfs_removeres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(&xdr, result->dir_attr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + +/* * Decode RENAME reply */ static int @@ -1493,6 +2234,51 @@ nfs3_xdr_renameres(struct rpc_rqst *req, __be32 *p, struct nfs_renameres *res) } /* + * 3.3.14 RENAME3res + * + * struct RENAME3resok { + * wcc_data fromdir_wcc; + * wcc_data todir_wcc; + * }; + * + * struct RENAME3resfail { + * wcc_data fromdir_wcc; + * wcc_data todir_wcc; + * }; + * + * union RENAME3res switch (nfsstat3 status) { + * case NFS3_OK: + * RENAME3resok resok; + * default: + * RENAME3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req, __be32 *p, + struct nfs_renameres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(&xdr, result->old_fattr); + if (unlikely(error)) + goto out; + error = decode_wcc_data(&xdr, result->new_fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + +/* * Decode LINK reply */ static int @@ -1508,6 +2294,249 @@ nfs3_xdr_linkres(struct rpc_rqst *req, __be32 *p, struct nfs3_linkres *res) } /* + * 3.3.15 LINK3res + * + * struct LINK3resok { + * post_op_attr file_attributes; + * wcc_data linkdir_wcc; + * }; + * + * struct LINK3resfail { + * post_op_attr file_attributes; + * wcc_data linkdir_wcc; + * }; + * + * union LINK3res switch (nfsstat3 status) { + * case NFS3_OK: + * LINK3resok resok; + * default: + * LINK3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, __be32 *p, + struct nfs3_linkres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_wcc_data(&xdr, result->dir_attr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + +/** + * nfs3_decode_dirent - Decode a single NFSv3 directory entry stored in + * the local page cache + * @xdr: XDR stream where entry resides + * @entry: buffer to fill in with entry data + * @server: nfs_server data for this directory + * @plus: boolean indicating whether this should be a readdirplus entry + * + * Returns the position of the next item in the buffer, or an ERR_PTR. + * + * This function is not invoked during READDIR reply decoding, but + * rather whenever an application invokes the getdents(2) system call + * on a directory already in our cache. + * + * 3.3.16 entry3 + * + * struct entry3 { + * fileid3 fileid; + * filename3 name; + * cookie3 cookie; + * fhandle3 filehandle; + * post_op_attr3 attributes; + * entry3 *nextentry; + * }; + * + * 3.3.17 entryplus3 + * struct entryplus3 { + * fileid3 fileid; + * filename3 name; + * cookie3 cookie; + * post_op_attr name_attributes; + * post_op_fh3 name_handle; + * entryplus3 *nextentry; + * }; + */ +__be32 *nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, + struct nfs_server *server, int plus) +{ + struct nfs_entry old = *entry; + __be32 *p; + int error; + + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p == xdr_zero) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p == xdr_zero) + return ERR_PTR(-EAGAIN); + entry->eof = 1; + return ERR_PTR(-EBADCOOKIE); + } + + error = decode_fileid3(xdr, &entry->ino); + if (unlikely(error)) + return ERR_PTR(error); + + error = decode_inline_filename3(xdr, &entry->name, &entry->len); + if (unlikely(error)) + return ERR_PTR(error); + + entry->prev_cookie = entry->cookie; + error = decode_cookie3(xdr, &entry->cookie); + if (unlikely(error)) + return ERR_PTR(error); + + entry->d_type = DT_UNKNOWN; + + if (plus) { + entry->fattr->valid = 0; + error = decode_post_op_attr(xdr, entry->fattr); + if (unlikely(error)) + return ERR_PTR(error); + if (entry->fattr->valid & NFS_ATTR_FATTR_V3) + entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); + + /* In fact, a post_op_fh3: */ + p = xdr_inline_decode(xdr, 4); + if (unlikely(p == NULL)) + goto out_overflow; + if (*p != xdr_zero) { + error = decode_nfs_fh3(xdr, entry->fh); + if (unlikely(error)) { + if (error == -E2BIG) + goto out_truncated; + return ERR_PTR(error); + } + } else + zero_nfs_fh3(entry->fh); + } + + /* Peek at the next entry to see if we're at EOD */ + p = xdr_inline_peek(xdr, 4 + 4); + entry->eof = 0; + if (p != NULL) + entry->eof = (p[0] == xdr_zero) && (p[1] != xdr_zero); + return p; + +out_overflow: + print_overflow_msg(__func__, xdr); + return ERR_PTR(-EAGAIN); +out_truncated: + dprintk("NFS: directory entry contains invalid file handle\n"); + *entry = old; + return ERR_PTR(-EAGAIN); +} + +/* + * 3.3.16 READDIR3res + * + * struct dirlist3 { + * entry3 *entries; + * bool eof; + * }; + * + * struct READDIR3resok { + * post_op_attr dir_attributes; + * cookieverf3 cookieverf; + * dirlist3 reply; + * }; + * + * struct READDIR3resfail { + * post_op_attr dir_attributes; + * }; + * + * union READDIR3res switch (nfsstat3 status) { + * case NFS3_OK: + * READDIR3resok resok; + * default: + * READDIR3resfail resfail; + * }; + * + * Read the directory contents into the page cache, but otherwise + * don't touch them. The actual decoding is done by nfs3_decode_entry() + * during subsequent nfs_readdir() calls. + */ +static int decode_dirlist3(struct xdr_stream *xdr) +{ + u32 recvd, pglen; + size_t hdrlen; + + pglen = xdr->buf->page_len; + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + recvd = xdr->buf->len - hdrlen; + if (unlikely(pglen > recvd)) + goto out_cheating; +out: + xdr_read_pages(xdr, pglen); + return pglen; +out_cheating: + dprintk("NFS: server cheating in readdir result: " + "pglen %u > recvd %u\n", pglen, recvd); + pglen = recvd; + goto out; +} + +static int decode_readdir3resok(struct xdr_stream *xdr, + struct nfs3_readdirres *result) +{ + int error; + + error = decode_post_op_attr(xdr, result->dir_attr); + if (unlikely(error)) + goto out; + /* XXX: do we need to check if result->verf != NULL ? */ + error = decode_cookieverf3(xdr, result->verf); + if (unlikely(error)) + goto out; + error = decode_dirlist3(xdr); +out: + return error; +} + +static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req, __be32 *p, + struct nfs3_readdirres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_readdir3resok(&xdr, result); +out: + return error; +out_default: + error = decode_post_op_attr(&xdr, result->dir_attr); + if (unlikely(error)) + goto out; + return nfs_stat_to_errno(status); +} + +/* * Decode FSSTAT reply */ static int @@ -1533,6 +2562,75 @@ nfs3_xdr_fsstatres(struct rpc_rqst *req, __be32 *p, struct nfs_fsstat *res) } /* + * 3.3.18 FSSTAT3res + * + * struct FSSTAT3resok { + * post_op_attr obj_attributes; + * size3 tbytes; + * size3 fbytes; + * size3 abytes; + * size3 tfiles; + * size3 ffiles; + * size3 afiles; + * uint32 invarsec; + * }; + * + * struct FSSTAT3resfail { + * post_op_attr obj_attributes; + * }; + * + * union FSSTAT3res switch (nfsstat3 status) { + * case NFS3_OK: + * FSSTAT3resok resok; + * default: + * FSSTAT3resfail resfail; + * }; + */ +static int decode_fsstat3resok(struct xdr_stream *xdr, + struct nfs_fsstat *result) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 8 * 6 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + p = xdr_decode_size3(p, &result->tbytes); + p = xdr_decode_size3(p, &result->fbytes); + p = xdr_decode_size3(p, &result->abytes); + p = xdr_decode_size3(p, &result->tfiles); + p = xdr_decode_size3(p, &result->ffiles); + xdr_decode_size3(p, &result->afiles); + /* ignore invarsec */ + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, __be32 *p, + struct nfs_fsstat *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_fsstat3resok(&xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + +/* * Decode FSINFO reply */ static int @@ -1562,6 +2660,83 @@ nfs3_xdr_fsinfores(struct rpc_rqst *req, __be32 *p, struct nfs_fsinfo *res) } /* + * 3.3.19 FSINFO3res + * + * struct FSINFO3resok { + * post_op_attr obj_attributes; + * uint32 rtmax; + * uint32 rtpref; + * uint32 rtmult; + * uint32 wtmax; + * uint32 wtpref; + * uint32 wtmult; + * uint32 dtpref; + * size3 maxfilesize; + * nfstime3 time_delta; + * uint32 properties; + * }; + * + * struct FSINFO3resfail { + * post_op_attr obj_attributes; + * }; + * + * union FSINFO3res switch (nfsstat3 status) { + * case NFS3_OK: + * FSINFO3resok resok; + * default: + * FSINFO3resfail resfail; + * }; + */ +static int decode_fsinfo3resok(struct xdr_stream *xdr, + struct nfs_fsinfo *result) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4); + if (unlikely(p == NULL)) + goto out_overflow; + result->rtmax = be32_to_cpup(p++); + result->rtpref = be32_to_cpup(p++); + result->rtmult = be32_to_cpup(p++); + result->wtmax = be32_to_cpup(p++); + result->wtpref = be32_to_cpup(p++); + result->wtmult = be32_to_cpup(p++); + result->dtpref = be32_to_cpup(p++); + p = xdr_decode_size3(p, &result->maxfilesize); + xdr_decode_time3(p, &result->time_delta); + + /* ignore properties */ + result->lease_time = 0; + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, __be32 *p, + struct nfs_fsinfo *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_fsinfo3resok(&xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + +/* * Decode PATHCONF reply */ static int @@ -1582,6 +2757,70 @@ nfs3_xdr_pathconfres(struct rpc_rqst *req, __be32 *p, struct nfs_pathconf *res) } /* + * 3.3.20 PATHCONF3res + * + * struct PATHCONF3resok { + * post_op_attr obj_attributes; + * uint32 linkmax; + * uint32 name_max; + * bool no_trunc; + * bool chown_restricted; + * bool case_insensitive; + * bool case_preserving; + * }; + * + * struct PATHCONF3resfail { + * post_op_attr obj_attributes; + * }; + * + * union PATHCONF3res switch (nfsstat3 status) { + * case NFS3_OK: + * PATHCONF3resok resok; + * default: + * PATHCONF3resfail resfail; + * }; + */ +static int decode_pathconf3resok(struct xdr_stream *xdr, + struct nfs_pathconf *result) +{ + __be32 *p; + + p = xdr_inline_decode(xdr, 4 * 6); + if (unlikely(p == NULL)) + goto out_overflow; + result->max_link = be32_to_cpup(p++); + result->max_namelen = be32_to_cpup(p); + /* ignore remaining fields */ + return 0; +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + +static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, __be32 *p, + struct nfs_pathconf *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_post_op_attr(&xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_pathconf3resok(&xdr, result); +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + +/* * Decode COMMIT reply */ static int @@ -1599,6 +2838,48 @@ nfs3_xdr_commitres(struct rpc_rqst *req, __be32 *p, struct nfs_writeres *res) return 0; } +/* + * 3.3.21 COMMIT3res + * + * struct COMMIT3resok { + * wcc_data file_wcc; + * writeverf3 verf; + * }; + * + * struct COMMIT3resfail { + * wcc_data file_wcc; + * }; + * + * union COMMIT3res switch (nfsstat3 status) { + * case NFS3_OK: + * COMMIT3resok resok; + * default: + * COMMIT3resfail resfail; + * }; + */ +static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req, __be32 *p, + struct nfs_writeres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + error = decode_wcc_data(&xdr, result->fattr); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_status; + error = decode_writeverf3(&xdr, result->verf->verifier); +out: + return error; +out_status: + return nfs_stat_to_errno(status); +} + #ifdef CONFIG_NFS_V3_ACL /* * Decode GETACL reply @@ -1632,6 +2913,70 @@ nfs3_xdr_getaclres(struct rpc_rqst *req, __be32 *p, return (err > 0) ? 0 : err; } +static inline int decode_getacl3resok(struct xdr_stream *xdr, + struct nfs3_getaclres *result) +{ + struct posix_acl **acl; + unsigned int *aclcnt; + size_t hdrlen; + int error; + + error = decode_post_op_attr(xdr, result->fattr); + if (unlikely(error)) + goto out; + error = decode_uint32(xdr, &result->mask); + if (unlikely(error)) + goto out; + error = -EINVAL; + if (result->mask & ~(NFS_ACL|NFS_ACLCNT|NFS_DFACL|NFS_DFACLCNT)) + goto out; + + hdrlen = (u8 *)xdr->p - (u8 *)xdr->iov->iov_base; + + acl = NULL; + if (result->mask & NFS_ACL) + acl = &result->acl_access; + aclcnt = NULL; + if (result->mask & NFS_ACLCNT) + aclcnt = &result->acl_access_count; + error = nfsacl_decode(xdr->buf, hdrlen, aclcnt, acl); + if (unlikely(error <= 0)) + goto out; + + acl = NULL; + if (result->mask & NFS_DFACL) + acl = &result->acl_default; + aclcnt = NULL; + if (result->mask & NFS_DFACLCNT) + aclcnt = &result->acl_default_count; + error = nfsacl_decode(xdr->buf, hdrlen + error, aclcnt, acl); + if (unlikely(error <= 0)) + return error; + error = 0; +out: + return error; +} + +static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req, __be32 *p, + struct nfs3_getaclres *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_getacl3resok(&xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} + /* * Decode setacl reply. */ @@ -1645,6 +2990,27 @@ nfs3_xdr_setaclres(struct rpc_rqst *req, __be32 *p, struct nfs_fattr *fattr) xdr_decode_post_op_attr(p, fattr); return 0; } + +static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, __be32 *p, + struct nfs_fattr *result) +{ + struct xdr_stream xdr; + enum nfs_stat status; + int error; + + xdr_init_decode(&xdr, &req->rq_rcv_buf, p); + error = decode_nfsstat3(&xdr, &status); + if (unlikely(error)) + goto out; + if (status != NFS3_OK) + goto out_default; + error = decode_post_op_attr(&xdr, result); +out: + return error; +out_default: + return nfs_stat_to_errno(status); +} + #endif /* CONFIG_NFS_V3_ACL */ #define PROC(proc, argtype, restype, timer) \ |
