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2588 lines
56 KiB
2588 lines
56 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/fs/nfs/nfs3xdr.c |
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* |
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* XDR functions to encode/decode NFSv3 RPC arguments and results. |
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* |
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* Copyright (C) 1996, 1997 Olaf Kirch |
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*/ |
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|
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#include <linux/param.h> |
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#include <linux/time.h> |
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#include <linux/mm.h> |
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#include <linux/errno.h> |
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#include <linux/string.h> |
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#include <linux/in.h> |
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#include <linux/pagemap.h> |
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#include <linux/proc_fs.h> |
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#include <linux/kdev_t.h> |
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#include <linux/sunrpc/clnt.h> |
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#include <linux/nfs.h> |
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#include <linux/nfs3.h> |
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#include <linux/nfs_fs.h> |
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#include <linux/nfsacl.h> |
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#include "nfstrace.h" |
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#include "internal.h" |
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|
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#define NFSDBG_FACILITY NFSDBG_XDR |
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|
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/* Mapping from NFS error code to "errno" error code. */ |
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#define errno_NFSERR_IO EIO |
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|
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/* |
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* Declare the space requirements for NFS arguments and replies as |
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* number of 32bit-words |
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*/ |
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#define NFS3_pagepad_sz (1) /* Page padding */ |
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#define NFS3_fhandle_sz (1+16) |
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#define NFS3_fh_sz (NFS3_fhandle_sz) /* shorthand */ |
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#define NFS3_post_op_fh_sz (1+NFS3_fh_sz) |
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#define NFS3_sattr_sz (15) |
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#define NFS3_filename_sz (1+(NFS3_MAXNAMLEN>>2)) |
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#define NFS3_path_sz (1+(NFS3_MAXPATHLEN>>2)) |
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#define NFS3_fattr_sz (21) |
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#define NFS3_cookieverf_sz (NFS3_COOKIEVERFSIZE>>2) |
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#define NFS3_wcc_attr_sz (6) |
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#define NFS3_pre_op_attr_sz (1+NFS3_wcc_attr_sz) |
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#define NFS3_post_op_attr_sz (1+NFS3_fattr_sz) |
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#define NFS3_wcc_data_sz (NFS3_pre_op_attr_sz+NFS3_post_op_attr_sz) |
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#define NFS3_diropargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
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|
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#define NFS3_getattrargs_sz (NFS3_fh_sz) |
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#define NFS3_setattrargs_sz (NFS3_fh_sz+NFS3_sattr_sz+3) |
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#define NFS3_lookupargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
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#define NFS3_accessargs_sz (NFS3_fh_sz+1) |
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#define NFS3_readlinkargs_sz (NFS3_fh_sz) |
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#define NFS3_readargs_sz (NFS3_fh_sz+3) |
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#define NFS3_writeargs_sz (NFS3_fh_sz+5) |
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#define NFS3_createargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) |
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#define NFS3_mkdirargs_sz (NFS3_diropargs_sz+NFS3_sattr_sz) |
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#define NFS3_symlinkargs_sz (NFS3_diropargs_sz+1+NFS3_sattr_sz) |
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#define NFS3_mknodargs_sz (NFS3_diropargs_sz+2+NFS3_sattr_sz) |
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#define NFS3_removeargs_sz (NFS3_fh_sz+NFS3_filename_sz) |
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#define NFS3_renameargs_sz (NFS3_diropargs_sz+NFS3_diropargs_sz) |
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#define NFS3_linkargs_sz (NFS3_fh_sz+NFS3_diropargs_sz) |
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#define NFS3_readdirargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+3) |
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#define NFS3_readdirplusargs_sz (NFS3_fh_sz+NFS3_cookieverf_sz+4) |
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#define NFS3_commitargs_sz (NFS3_fh_sz+3) |
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|
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#define NFS3_getattrres_sz (1+NFS3_fattr_sz) |
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#define NFS3_setattrres_sz (1+NFS3_wcc_data_sz) |
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#define NFS3_removeres_sz (NFS3_setattrres_sz) |
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#define NFS3_lookupres_sz (1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz)) |
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#define NFS3_accessres_sz (1+NFS3_post_op_attr_sz+1) |
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#define NFS3_readlinkres_sz (1+NFS3_post_op_attr_sz+1+NFS3_pagepad_sz) |
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#define NFS3_readres_sz (1+NFS3_post_op_attr_sz+3+NFS3_pagepad_sz) |
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#define NFS3_writeres_sz (1+NFS3_wcc_data_sz+4) |
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#define NFS3_createres_sz (1+NFS3_post_op_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) |
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#define NFS3_renameres_sz (1+(2 * NFS3_wcc_data_sz)) |
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#define NFS3_linkres_sz (1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz) |
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#define NFS3_readdirres_sz (1+NFS3_post_op_attr_sz+2+NFS3_pagepad_sz) |
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#define NFS3_fsstatres_sz (1+NFS3_post_op_attr_sz+13) |
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#define NFS3_fsinfores_sz (1+NFS3_post_op_attr_sz+12) |
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#define NFS3_pathconfres_sz (1+NFS3_post_op_attr_sz+6) |
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#define NFS3_commitres_sz (1+NFS3_wcc_data_sz+2) |
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|
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#define ACL3_getaclargs_sz (NFS3_fh_sz+1) |
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#define ACL3_setaclargs_sz (NFS3_fh_sz+1+ \ |
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XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)) |
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#define ACL3_getaclres_sz (1+NFS3_post_op_attr_sz+1+ \ |
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XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)+\ |
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NFS3_pagepad_sz) |
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#define ACL3_setaclres_sz (1+NFS3_post_op_attr_sz) |
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|
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static int nfs3_stat_to_errno(enum nfs_stat); |
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|
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/* |
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* Map file type to S_IFMT bits |
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*/ |
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static const umode_t nfs_type2fmt[] = { |
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[NF3BAD] = 0, |
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[NF3REG] = S_IFREG, |
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[NF3DIR] = S_IFDIR, |
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[NF3BLK] = S_IFBLK, |
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[NF3CHR] = S_IFCHR, |
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[NF3LNK] = S_IFLNK, |
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[NF3SOCK] = S_IFSOCK, |
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[NF3FIFO] = S_IFIFO, |
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}; |
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|
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static struct user_namespace *rpc_userns(const struct rpc_clnt *clnt) |
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{ |
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if (clnt && clnt->cl_cred) |
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return clnt->cl_cred->user_ns; |
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return &init_user_ns; |
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} |
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|
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static struct user_namespace *rpc_rqst_userns(const struct rpc_rqst *rqstp) |
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{ |
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if (rqstp->rq_task) |
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return rpc_userns(rqstp->rq_task->tk_client); |
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return &init_user_ns; |
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} |
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|
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/* |
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* Encode/decode NFSv3 basic data types |
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* |
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* Basic NFSv3 data types are defined in section 2.5 of RFC 1813: |
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* "NFS Version 3 Protocol Specification". |
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* |
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* Not all basic data types have their own encoding and decoding |
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* functions. For run-time efficiency, some data types are encoded |
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* or decoded inline. |
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*/ |
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|
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static void encode_uint32(struct xdr_stream *xdr, u32 value) |
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{ |
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__be32 *p = xdr_reserve_space(xdr, 4); |
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*p = cpu_to_be32(value); |
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} |
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|
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static int decode_uint32(struct xdr_stream *xdr, u32 *value) |
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{ |
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__be32 *p; |
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|
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p = xdr_inline_decode(xdr, 4); |
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if (unlikely(!p)) |
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return -EIO; |
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*value = be32_to_cpup(p); |
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return 0; |
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} |
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|
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static int decode_uint64(struct xdr_stream *xdr, u64 *value) |
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{ |
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__be32 *p; |
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|
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p = xdr_inline_decode(xdr, 8); |
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if (unlikely(!p)) |
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return -EIO; |
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xdr_decode_hyper(p, value); |
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return 0; |
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} |
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|
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/* |
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* fileid3 |
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* |
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* typedef uint64 fileid3; |
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*/ |
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static __be32 *xdr_decode_fileid3(__be32 *p, u64 *fileid) |
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{ |
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return xdr_decode_hyper(p, fileid); |
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} |
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|
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static int decode_fileid3(struct xdr_stream *xdr, u64 *fileid) |
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{ |
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return decode_uint64(xdr, fileid); |
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} |
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|
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/* |
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* filename3 |
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* |
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* typedef string filename3<>; |
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*/ |
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static void encode_filename3(struct xdr_stream *xdr, |
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const char *name, u32 length) |
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{ |
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__be32 *p; |
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|
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WARN_ON_ONCE(length > NFS3_MAXNAMLEN); |
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p = xdr_reserve_space(xdr, 4 + length); |
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xdr_encode_opaque(p, name, length); |
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} |
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|
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static int decode_inline_filename3(struct xdr_stream *xdr, |
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const char **name, u32 *length) |
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{ |
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__be32 *p; |
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u32 count; |
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|
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p = xdr_inline_decode(xdr, 4); |
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if (unlikely(!p)) |
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return -EIO; |
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count = be32_to_cpup(p); |
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if (count > NFS3_MAXNAMLEN) |
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goto out_nametoolong; |
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p = xdr_inline_decode(xdr, count); |
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if (unlikely(!p)) |
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return -EIO; |
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*name = (const char *)p; |
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*length = count; |
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return 0; |
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|
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out_nametoolong: |
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dprintk("NFS: returned filename too long: %u\n", count); |
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return -ENAMETOOLONG; |
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} |
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|
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/* |
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* nfspath3 |
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* |
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* typedef string nfspath3<>; |
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*/ |
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static void encode_nfspath3(struct xdr_stream *xdr, struct page **pages, |
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const u32 length) |
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{ |
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encode_uint32(xdr, length); |
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xdr_write_pages(xdr, pages, 0, length); |
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} |
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|
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static int decode_nfspath3(struct xdr_stream *xdr) |
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{ |
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u32 recvd, count; |
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__be32 *p; |
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|
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p = xdr_inline_decode(xdr, 4); |
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if (unlikely(!p)) |
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return -EIO; |
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count = be32_to_cpup(p); |
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if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN)) |
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goto out_nametoolong; |
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recvd = xdr_read_pages(xdr, count); |
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if (unlikely(count > recvd)) |
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goto out_cheating; |
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xdr_terminate_string(xdr->buf, count); |
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return 0; |
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|
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out_nametoolong: |
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dprintk("NFS: returned pathname too long: %u\n", count); |
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return -ENAMETOOLONG; |
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out_cheating: |
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dprintk("NFS: server cheating in pathname result: " |
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"count %u > recvd %u\n", count, recvd); |
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return -EIO; |
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} |
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|
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/* |
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* cookie3 |
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* |
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* typedef uint64 cookie3 |
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*/ |
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static __be32 *xdr_encode_cookie3(__be32 *p, u64 cookie) |
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{ |
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return xdr_encode_hyper(p, cookie); |
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} |
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|
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static int decode_cookie3(struct xdr_stream *xdr, u64 *cookie) |
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{ |
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return decode_uint64(xdr, cookie); |
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} |
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|
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/* |
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* cookieverf3 |
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* |
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* typedef opaque cookieverf3[NFS3_COOKIEVERFSIZE]; |
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*/ |
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static __be32 *xdr_encode_cookieverf3(__be32 *p, const __be32 *verifier) |
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{ |
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memcpy(p, verifier, NFS3_COOKIEVERFSIZE); |
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return p + XDR_QUADLEN(NFS3_COOKIEVERFSIZE); |
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} |
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|
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static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier) |
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{ |
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__be32 *p; |
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|
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p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE); |
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if (unlikely(!p)) |
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return -EIO; |
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memcpy(verifier, p, NFS3_COOKIEVERFSIZE); |
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return 0; |
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} |
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|
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/* |
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* createverf3 |
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* |
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* typedef opaque createverf3[NFS3_CREATEVERFSIZE]; |
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*/ |
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static void encode_createverf3(struct xdr_stream *xdr, const __be32 *verifier) |
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{ |
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__be32 *p; |
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|
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p = xdr_reserve_space(xdr, NFS3_CREATEVERFSIZE); |
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memcpy(p, verifier, NFS3_CREATEVERFSIZE); |
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} |
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|
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static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *verifier) |
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{ |
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__be32 *p; |
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|
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p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE); |
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if (unlikely(!p)) |
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return -EIO; |
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memcpy(verifier->data, p, NFS3_WRITEVERFSIZE); |
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return 0; |
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} |
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|
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/* |
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* size3 |
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* |
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* typedef uint64 size3; |
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*/ |
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static __be32 *xdr_decode_size3(__be32 *p, u64 *size) |
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{ |
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return xdr_decode_hyper(p, size); |
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} |
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|
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/* |
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* nfsstat3 |
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* |
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* enum nfsstat3 { |
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* NFS3_OK = 0, |
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* ... |
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* } |
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*/ |
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#define NFS3_OK NFS_OK |
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|
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static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status) |
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{ |
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__be32 *p; |
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|
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p = xdr_inline_decode(xdr, 4); |
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if (unlikely(!p)) |
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return -EIO; |
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if (unlikely(*p != cpu_to_be32(NFS3_OK))) |
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goto out_status; |
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*status = 0; |
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return 0; |
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out_status: |
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*status = be32_to_cpup(p); |
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trace_nfs_xdr_status(xdr, (int)*status); |
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return 0; |
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} |
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|
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/* |
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* ftype3 |
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* |
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* enum ftype3 { |
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* NF3REG = 1, |
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* NF3DIR = 2, |
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* NF3BLK = 3, |
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* NF3CHR = 4, |
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* NF3LNK = 5, |
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* NF3SOCK = 6, |
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* NF3FIFO = 7 |
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* }; |
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*/ |
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static void encode_ftype3(struct xdr_stream *xdr, const u32 type) |
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{ |
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encode_uint32(xdr, type); |
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} |
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|
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static __be32 *xdr_decode_ftype3(__be32 *p, umode_t *mode) |
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{ |
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u32 type; |
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|
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type = be32_to_cpup(p++); |
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if (type > NF3FIFO) |
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type = NF3NON; |
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*mode = nfs_type2fmt[type]; |
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return p; |
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} |
|
|
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/* |
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* specdata3 |
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* |
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* struct specdata3 { |
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* uint32 specdata1; |
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* uint32 specdata2; |
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* }; |
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*/ |
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static void encode_specdata3(struct xdr_stream *xdr, const dev_t rdev) |
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{ |
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__be32 *p; |
|
|
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p = xdr_reserve_space(xdr, 8); |
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*p++ = cpu_to_be32(MAJOR(rdev)); |
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*p = cpu_to_be32(MINOR(rdev)); |
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} |
|
|
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static __be32 *xdr_decode_specdata3(__be32 *p, dev_t *rdev) |
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{ |
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unsigned int major, minor; |
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|
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major = be32_to_cpup(p++); |
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minor = be32_to_cpup(p++); |
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*rdev = MKDEV(major, minor); |
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if (MAJOR(*rdev) != major || MINOR(*rdev) != minor) |
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*rdev = 0; |
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return p; |
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} |
|
|
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/* |
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* nfs_fh3 |
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* |
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* struct nfs_fh3 { |
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* opaque data<NFS3_FHSIZE>; |
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* }; |
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*/ |
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static void encode_nfs_fh3(struct xdr_stream *xdr, const struct nfs_fh *fh) |
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{ |
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__be32 *p; |
|
|
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WARN_ON_ONCE(fh->size > NFS3_FHSIZE); |
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p = xdr_reserve_space(xdr, 4 + fh->size); |
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xdr_encode_opaque(p, fh->data, fh->size); |
|
} |
|
|
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static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh) |
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{ |
|
u32 length; |
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__be32 *p; |
|
|
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p = xdr_inline_decode(xdr, 4); |
|
if (unlikely(!p)) |
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return -EIO; |
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length = be32_to_cpup(p++); |
|
if (unlikely(length > NFS3_FHSIZE)) |
|
goto out_toobig; |
|
p = xdr_inline_decode(xdr, length); |
|
if (unlikely(!p)) |
|
return -EIO; |
|
fh->size = length; |
|
memcpy(fh->data, p, length); |
|
return 0; |
|
out_toobig: |
|
dprintk("NFS: file handle size (%u) too big\n", length); |
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return -E2BIG; |
|
} |
|
|
|
static void zero_nfs_fh3(struct nfs_fh *fh) |
|
{ |
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memset(fh, 0, sizeof(*fh)); |
|
} |
|
|
|
/* |
|
* nfstime3 |
|
* |
|
* struct nfstime3 { |
|
* uint32 seconds; |
|
* uint32 nseconds; |
|
* }; |
|
*/ |
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static __be32 *xdr_encode_nfstime3(__be32 *p, const struct timespec64 *timep) |
|
{ |
|
*p++ = cpu_to_be32((u32)timep->tv_sec); |
|
*p++ = cpu_to_be32(timep->tv_nsec); |
|
return p; |
|
} |
|
|
|
static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec64 *timep) |
|
{ |
|
timep->tv_sec = be32_to_cpup(p++); |
|
timep->tv_nsec = be32_to_cpup(p++); |
|
return p; |
|
} |
|
|
|
/* |
|
* sattr3 |
|
* |
|
* enum time_how { |
|
* DONT_CHANGE = 0, |
|
* SET_TO_SERVER_TIME = 1, |
|
* SET_TO_CLIENT_TIME = 2 |
|
* }; |
|
* |
|
* union set_mode3 switch (bool set_it) { |
|
* case TRUE: |
|
* mode3 mode; |
|
* default: |
|
* void; |
|
* }; |
|
* |
|
* union set_uid3 switch (bool set_it) { |
|
* case TRUE: |
|
* uid3 uid; |
|
* default: |
|
* void; |
|
* }; |
|
* |
|
* union set_gid3 switch (bool set_it) { |
|
* case TRUE: |
|
* gid3 gid; |
|
* default: |
|
* void; |
|
* }; |
|
* |
|
* union set_size3 switch (bool set_it) { |
|
* case TRUE: |
|
* size3 size; |
|
* default: |
|
* void; |
|
* }; |
|
* |
|
* union set_atime switch (time_how set_it) { |
|
* case SET_TO_CLIENT_TIME: |
|
* nfstime3 atime; |
|
* default: |
|
* void; |
|
* }; |
|
* |
|
* union set_mtime switch (time_how set_it) { |
|
* case SET_TO_CLIENT_TIME: |
|
* nfstime3 mtime; |
|
* default: |
|
* void; |
|
* }; |
|
* |
|
* struct sattr3 { |
|
* set_mode3 mode; |
|
* set_uid3 uid; |
|
* set_gid3 gid; |
|
* set_size3 size; |
|
* set_atime atime; |
|
* set_mtime mtime; |
|
* }; |
|
*/ |
|
static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr, |
|
struct user_namespace *userns) |
|
{ |
|
u32 nbytes; |
|
__be32 *p; |
|
|
|
/* |
|
* In order to make only a single xdr_reserve_space() call, |
|
* pre-compute the total number of bytes to be reserved. |
|
* Six boolean values, one for each set_foo field, are always |
|
* present in the encoded result, so start there. |
|
*/ |
|
nbytes = 6 * 4; |
|
if (attr->ia_valid & ATTR_MODE) |
|
nbytes += 4; |
|
if (attr->ia_valid & ATTR_UID) |
|
nbytes += 4; |
|
if (attr->ia_valid & ATTR_GID) |
|
nbytes += 4; |
|
if (attr->ia_valid & ATTR_SIZE) |
|
nbytes += 8; |
|
if (attr->ia_valid & ATTR_ATIME_SET) |
|
nbytes += 8; |
|
if (attr->ia_valid & ATTR_MTIME_SET) |
|
nbytes += 8; |
|
p = xdr_reserve_space(xdr, nbytes); |
|
|
|
if (attr->ia_valid & ATTR_MODE) { |
|
*p++ = xdr_one; |
|
*p++ = cpu_to_be32(attr->ia_mode & S_IALLUGO); |
|
} else |
|
*p++ = xdr_zero; |
|
|
|
if (attr->ia_valid & ATTR_UID) { |
|
*p++ = xdr_one; |
|
*p++ = cpu_to_be32(from_kuid_munged(userns, attr->ia_uid)); |
|
} else |
|
*p++ = xdr_zero; |
|
|
|
if (attr->ia_valid & ATTR_GID) { |
|
*p++ = xdr_one; |
|
*p++ = cpu_to_be32(from_kgid_munged(userns, attr->ia_gid)); |
|
} else |
|
*p++ = xdr_zero; |
|
|
|
if (attr->ia_valid & ATTR_SIZE) { |
|
*p++ = xdr_one; |
|
p = xdr_encode_hyper(p, (u64)attr->ia_size); |
|
} else |
|
*p++ = xdr_zero; |
|
|
|
if (attr->ia_valid & ATTR_ATIME_SET) { |
|
*p++ = xdr_two; |
|
p = xdr_encode_nfstime3(p, &attr->ia_atime); |
|
} else if (attr->ia_valid & ATTR_ATIME) { |
|
*p++ = xdr_one; |
|
} else |
|
*p++ = xdr_zero; |
|
|
|
if (attr->ia_valid & ATTR_MTIME_SET) { |
|
*p++ = xdr_two; |
|
xdr_encode_nfstime3(p, &attr->ia_mtime); |
|
} else if (attr->ia_valid & ATTR_MTIME) { |
|
*p = xdr_one; |
|
} else |
|
*p = xdr_zero; |
|
} |
|
|
|
/* |
|
* 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, |
|
struct user_namespace *userns) |
|
{ |
|
umode_t fmode; |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2); |
|
if (unlikely(!p)) |
|
return -EIO; |
|
|
|
p = xdr_decode_ftype3(p, &fmode); |
|
|
|
fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode; |
|
fattr->nlink = be32_to_cpup(p++); |
|
fattr->uid = make_kuid(userns, be32_to_cpup(p++)); |
|
if (!uid_valid(fattr->uid)) |
|
goto out_uid; |
|
fattr->gid = make_kgid(userns, be32_to_cpup(p++)); |
|
if (!gid_valid(fattr->gid)) |
|
goto out_gid; |
|
|
|
p = xdr_decode_size3(p, &fattr->size); |
|
p = xdr_decode_size3(p, &fattr->du.nfs3.used); |
|
p = xdr_decode_specdata3(p, &fattr->rdev); |
|
|
|
p = xdr_decode_hyper(p, &fattr->fsid.major); |
|
fattr->fsid.minor = 0; |
|
|
|
p = xdr_decode_fileid3(p, &fattr->fileid); |
|
p = xdr_decode_nfstime3(p, &fattr->atime); |
|
p = xdr_decode_nfstime3(p, &fattr->mtime); |
|
xdr_decode_nfstime3(p, &fattr->ctime); |
|
fattr->change_attr = nfs_timespec_to_change_attr(&fattr->ctime); |
|
|
|
fattr->valid |= NFS_ATTR_FATTR_V3; |
|
return 0; |
|
out_uid: |
|
dprintk("NFS: returned invalid uid\n"); |
|
return -EINVAL; |
|
out_gid: |
|
dprintk("NFS: returned invalid gid\n"); |
|
return -EINVAL; |
|
} |
|
|
|
/* |
|
* 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, |
|
struct user_namespace *userns) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(xdr, 4); |
|
if (unlikely(!p)) |
|
return -EIO; |
|
if (*p != xdr_zero) |
|
return decode_fattr3(xdr, fattr, userns); |
|
return 0; |
|
} |
|
|
|
/* |
|
* 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)) |
|
return -EIO; |
|
|
|
fattr->valid |= NFS_ATTR_FATTR_PRESIZE |
|
| NFS_ATTR_FATTR_PRECHANGE |
|
| NFS_ATTR_FATTR_PREMTIME |
|
| NFS_ATTR_FATTR_PRECTIME; |
|
|
|
p = xdr_decode_size3(p, &fattr->pre_size); |
|
p = xdr_decode_nfstime3(p, &fattr->pre_mtime); |
|
xdr_decode_nfstime3(p, &fattr->pre_ctime); |
|
fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime); |
|
|
|
return 0; |
|
} |
|
|
|
/* |
|
* 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)) |
|
return -EIO; |
|
if (*p != xdr_zero) |
|
return decode_wcc_attr(xdr, fattr); |
|
return 0; |
|
} |
|
|
|
static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr, |
|
struct user_namespace *userns) |
|
{ |
|
int error; |
|
|
|
error = decode_pre_op_attr(xdr, fattr); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, fattr, userns); |
|
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)) |
|
return -EIO; |
|
if (*p != xdr_zero) |
|
return decode_nfs_fh3(xdr, fh); |
|
zero_nfs_fh3(fh); |
|
return 0; |
|
} |
|
|
|
/* |
|
* diropargs3 |
|
* |
|
* struct diropargs3 { |
|
* nfs_fh3 dir; |
|
* filename3 name; |
|
* }; |
|
*/ |
|
static void encode_diropargs3(struct xdr_stream *xdr, const struct nfs_fh *fh, |
|
const char *name, u32 length) |
|
{ |
|
encode_nfs_fh3(xdr, fh); |
|
encode_filename3(xdr, name, length); |
|
} |
|
|
|
|
|
/* |
|
* NFSv3 XDR encode functions |
|
* |
|
* NFSv3 argument types are defined in section 3.3 of RFC 1813: |
|
* "NFS Version 3 Protocol Specification". |
|
*/ |
|
|
|
/* |
|
* 3.3.1 GETATTR3args |
|
* |
|
* struct GETATTR3args { |
|
* nfs_fh3 object; |
|
* }; |
|
*/ |
|
static void nfs3_xdr_enc_getattr3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs_fh *fh = data; |
|
|
|
encode_nfs_fh3(xdr, fh); |
|
} |
|
|
|
/* |
|
* 3.3.2 SETATTR3args |
|
* |
|
* union sattrguard3 switch (bool check) { |
|
* case TRUE: |
|
* nfstime3 obj_ctime; |
|
* case FALSE: |
|
* void; |
|
* }; |
|
* |
|
* struct SETATTR3args { |
|
* nfs_fh3 object; |
|
* sattr3 new_attributes; |
|
* sattrguard3 guard; |
|
* }; |
|
*/ |
|
static void encode_sattrguard3(struct xdr_stream *xdr, |
|
const struct nfs3_sattrargs *args) |
|
{ |
|
__be32 *p; |
|
|
|
if (args->guard) { |
|
p = xdr_reserve_space(xdr, 4 + 8); |
|
*p++ = xdr_one; |
|
xdr_encode_nfstime3(p, &args->guardtime); |
|
} else { |
|
p = xdr_reserve_space(xdr, 4); |
|
*p = xdr_zero; |
|
} |
|
} |
|
|
|
static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_sattrargs *args = data; |
|
encode_nfs_fh3(xdr, args->fh); |
|
encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req)); |
|
encode_sattrguard3(xdr, args); |
|
} |
|
|
|
/* |
|
* 3.3.3 LOOKUP3args |
|
* |
|
* struct LOOKUP3args { |
|
* diropargs3 what; |
|
* }; |
|
*/ |
|
static void nfs3_xdr_enc_lookup3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_diropargs *args = data; |
|
|
|
encode_diropargs3(xdr, args->fh, args->name, args->len); |
|
} |
|
|
|
/* |
|
* 3.3.4 ACCESS3args |
|
* |
|
* struct ACCESS3args { |
|
* nfs_fh3 object; |
|
* uint32 access; |
|
* }; |
|
*/ |
|
static void encode_access3args(struct xdr_stream *xdr, |
|
const struct nfs3_accessargs *args) |
|
{ |
|
encode_nfs_fh3(xdr, args->fh); |
|
encode_uint32(xdr, args->access); |
|
} |
|
|
|
static void nfs3_xdr_enc_access3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_accessargs *args = data; |
|
|
|
encode_access3args(xdr, args); |
|
} |
|
|
|
/* |
|
* 3.3.5 READLINK3args |
|
* |
|
* struct READLINK3args { |
|
* nfs_fh3 symlink; |
|
* }; |
|
*/ |
|
static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_readlinkargs *args = data; |
|
|
|
encode_nfs_fh3(xdr, args->fh); |
|
rpc_prepare_reply_pages(req, args->pages, args->pgbase, args->pglen, |
|
NFS3_readlinkres_sz - NFS3_pagepad_sz); |
|
} |
|
|
|
/* |
|
* 3.3.6 READ3args |
|
* |
|
* struct READ3args { |
|
* nfs_fh3 file; |
|
* offset3 offset; |
|
* count3 count; |
|
* }; |
|
*/ |
|
static void encode_read3args(struct xdr_stream *xdr, |
|
const struct nfs_pgio_args *args) |
|
{ |
|
__be32 *p; |
|
|
|
encode_nfs_fh3(xdr, args->fh); |
|
|
|
p = xdr_reserve_space(xdr, 8 + 4); |
|
p = xdr_encode_hyper(p, args->offset); |
|
*p = cpu_to_be32(args->count); |
|
} |
|
|
|
static void nfs3_xdr_enc_read3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs_pgio_args *args = data; |
|
unsigned int replen = args->replen ? args->replen : |
|
NFS3_readres_sz - NFS3_pagepad_sz; |
|
|
|
encode_read3args(xdr, args); |
|
rpc_prepare_reply_pages(req, args->pages, args->pgbase, |
|
args->count, replen); |
|
req->rq_rcv_buf.flags |= XDRBUF_READ; |
|
} |
|
|
|
/* |
|
* 3.3.7 WRITE3args |
|
* |
|
* enum stable_how { |
|
* UNSTABLE = 0, |
|
* DATA_SYNC = 1, |
|
* FILE_SYNC = 2 |
|
* }; |
|
* |
|
* struct WRITE3args { |
|
* nfs_fh3 file; |
|
* offset3 offset; |
|
* count3 count; |
|
* stable_how stable; |
|
* opaque data<>; |
|
* }; |
|
*/ |
|
static void encode_write3args(struct xdr_stream *xdr, |
|
const struct nfs_pgio_args *args) |
|
{ |
|
__be32 *p; |
|
|
|
encode_nfs_fh3(xdr, args->fh); |
|
|
|
p = xdr_reserve_space(xdr, 8 + 4 + 4 + 4); |
|
p = xdr_encode_hyper(p, args->offset); |
|
*p++ = cpu_to_be32(args->count); |
|
*p++ = cpu_to_be32(args->stable); |
|
*p = cpu_to_be32(args->count); |
|
xdr_write_pages(xdr, args->pages, args->pgbase, args->count); |
|
} |
|
|
|
static void nfs3_xdr_enc_write3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs_pgio_args *args = data; |
|
|
|
encode_write3args(xdr, args); |
|
xdr->buf->flags |= XDRBUF_WRITE; |
|
} |
|
|
|
/* |
|
* 3.3.8 CREATE3args |
|
* |
|
* enum createmode3 { |
|
* UNCHECKED = 0, |
|
* GUARDED = 1, |
|
* EXCLUSIVE = 2 |
|
* }; |
|
* |
|
* union createhow3 switch (createmode3 mode) { |
|
* case UNCHECKED: |
|
* case GUARDED: |
|
* sattr3 obj_attributes; |
|
* case EXCLUSIVE: |
|
* createverf3 verf; |
|
* }; |
|
* |
|
* struct CREATE3args { |
|
* diropargs3 where; |
|
* createhow3 how; |
|
* }; |
|
*/ |
|
static void encode_createhow3(struct xdr_stream *xdr, |
|
const struct nfs3_createargs *args, |
|
struct user_namespace *userns) |
|
{ |
|
encode_uint32(xdr, args->createmode); |
|
switch (args->createmode) { |
|
case NFS3_CREATE_UNCHECKED: |
|
case NFS3_CREATE_GUARDED: |
|
encode_sattr3(xdr, args->sattr, userns); |
|
break; |
|
case NFS3_CREATE_EXCLUSIVE: |
|
encode_createverf3(xdr, args->verifier); |
|
break; |
|
default: |
|
BUG(); |
|
} |
|
} |
|
|
|
static void nfs3_xdr_enc_create3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_createargs *args = data; |
|
|
|
encode_diropargs3(xdr, args->fh, args->name, args->len); |
|
encode_createhow3(xdr, args, rpc_rqst_userns(req)); |
|
} |
|
|
|
/* |
|
* 3.3.9 MKDIR3args |
|
* |
|
* struct MKDIR3args { |
|
* diropargs3 where; |
|
* sattr3 attributes; |
|
* }; |
|
*/ |
|
static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_mkdirargs *args = data; |
|
|
|
encode_diropargs3(xdr, args->fh, args->name, args->len); |
|
encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req)); |
|
} |
|
|
|
/* |
|
* 3.3.10 SYMLINK3args |
|
* |
|
* struct symlinkdata3 { |
|
* sattr3 symlink_attributes; |
|
* nfspath3 symlink_data; |
|
* }; |
|
* |
|
* struct SYMLINK3args { |
|
* diropargs3 where; |
|
* symlinkdata3 symlink; |
|
* }; |
|
*/ |
|
static void encode_symlinkdata3(struct xdr_stream *xdr, |
|
const void *data, |
|
struct user_namespace *userns) |
|
{ |
|
const struct nfs3_symlinkargs *args = data; |
|
|
|
encode_sattr3(xdr, args->sattr, userns); |
|
encode_nfspath3(xdr, args->pages, args->pathlen); |
|
} |
|
|
|
static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_symlinkargs *args = data; |
|
|
|
encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen); |
|
encode_symlinkdata3(xdr, args, rpc_rqst_userns(req)); |
|
xdr->buf->flags |= XDRBUF_WRITE; |
|
} |
|
|
|
/* |
|
* 3.3.11 MKNOD3args |
|
* |
|
* struct devicedata3 { |
|
* sattr3 dev_attributes; |
|
* specdata3 spec; |
|
* }; |
|
* |
|
* union mknoddata3 switch (ftype3 type) { |
|
* case NF3CHR: |
|
* case NF3BLK: |
|
* devicedata3 device; |
|
* case NF3SOCK: |
|
* case NF3FIFO: |
|
* sattr3 pipe_attributes; |
|
* default: |
|
* void; |
|
* }; |
|
* |
|
* struct MKNOD3args { |
|
* diropargs3 where; |
|
* mknoddata3 what; |
|
* }; |
|
*/ |
|
static void encode_devicedata3(struct xdr_stream *xdr, |
|
const struct nfs3_mknodargs *args, |
|
struct user_namespace *userns) |
|
{ |
|
encode_sattr3(xdr, args->sattr, userns); |
|
encode_specdata3(xdr, args->rdev); |
|
} |
|
|
|
static void encode_mknoddata3(struct xdr_stream *xdr, |
|
const struct nfs3_mknodargs *args, |
|
struct user_namespace *userns) |
|
{ |
|
encode_ftype3(xdr, args->type); |
|
switch (args->type) { |
|
case NF3CHR: |
|
case NF3BLK: |
|
encode_devicedata3(xdr, args, userns); |
|
break; |
|
case NF3SOCK: |
|
case NF3FIFO: |
|
encode_sattr3(xdr, args->sattr, userns); |
|
break; |
|
case NF3REG: |
|
case NF3DIR: |
|
break; |
|
default: |
|
BUG(); |
|
} |
|
} |
|
|
|
static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_mknodargs *args = data; |
|
|
|
encode_diropargs3(xdr, args->fh, args->name, args->len); |
|
encode_mknoddata3(xdr, args, rpc_rqst_userns(req)); |
|
} |
|
|
|
/* |
|
* 3.3.12 REMOVE3args |
|
* |
|
* struct REMOVE3args { |
|
* diropargs3 object; |
|
* }; |
|
*/ |
|
static void nfs3_xdr_enc_remove3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs_removeargs *args = data; |
|
|
|
encode_diropargs3(xdr, args->fh, args->name.name, args->name.len); |
|
} |
|
|
|
/* |
|
* 3.3.14 RENAME3args |
|
* |
|
* struct RENAME3args { |
|
* diropargs3 from; |
|
* diropargs3 to; |
|
* }; |
|
*/ |
|
static void nfs3_xdr_enc_rename3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs_renameargs *args = data; |
|
const struct qstr *old = args->old_name; |
|
const struct qstr *new = args->new_name; |
|
|
|
encode_diropargs3(xdr, args->old_dir, old->name, old->len); |
|
encode_diropargs3(xdr, args->new_dir, new->name, new->len); |
|
} |
|
|
|
/* |
|
* 3.3.15 LINK3args |
|
* |
|
* struct LINK3args { |
|
* nfs_fh3 file; |
|
* diropargs3 link; |
|
* }; |
|
*/ |
|
static void nfs3_xdr_enc_link3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_linkargs *args = data; |
|
|
|
encode_nfs_fh3(xdr, args->fromfh); |
|
encode_diropargs3(xdr, args->tofh, args->toname, args->tolen); |
|
} |
|
|
|
/* |
|
* 3.3.16 READDIR3args |
|
* |
|
* struct READDIR3args { |
|
* nfs_fh3 dir; |
|
* cookie3 cookie; |
|
* cookieverf3 cookieverf; |
|
* count3 count; |
|
* }; |
|
*/ |
|
static void encode_readdir3args(struct xdr_stream *xdr, |
|
const struct nfs3_readdirargs *args) |
|
{ |
|
__be32 *p; |
|
|
|
encode_nfs_fh3(xdr, args->fh); |
|
|
|
p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4); |
|
p = xdr_encode_cookie3(p, args->cookie); |
|
p = xdr_encode_cookieverf3(p, args->verf); |
|
*p = cpu_to_be32(args->count); |
|
} |
|
|
|
static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_readdirargs *args = data; |
|
|
|
encode_readdir3args(xdr, args); |
|
rpc_prepare_reply_pages(req, args->pages, 0, args->count, |
|
NFS3_readdirres_sz - NFS3_pagepad_sz); |
|
} |
|
|
|
/* |
|
* 3.3.17 READDIRPLUS3args |
|
* |
|
* struct READDIRPLUS3args { |
|
* nfs_fh3 dir; |
|
* cookie3 cookie; |
|
* cookieverf3 cookieverf; |
|
* count3 dircount; |
|
* count3 maxcount; |
|
* }; |
|
*/ |
|
static void encode_readdirplus3args(struct xdr_stream *xdr, |
|
const struct nfs3_readdirargs *args) |
|
{ |
|
__be32 *p; |
|
|
|
encode_nfs_fh3(xdr, args->fh); |
|
|
|
p = xdr_reserve_space(xdr, 8 + NFS3_COOKIEVERFSIZE + 4 + 4); |
|
p = xdr_encode_cookie3(p, args->cookie); |
|
p = xdr_encode_cookieverf3(p, args->verf); |
|
|
|
/* |
|
* readdirplus: need dircount + buffer size. |
|
* We just make sure we make dircount big enough |
|
*/ |
|
*p++ = cpu_to_be32(args->count >> 3); |
|
|
|
*p = cpu_to_be32(args->count); |
|
} |
|
|
|
static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_readdirargs *args = data; |
|
|
|
encode_readdirplus3args(xdr, args); |
|
rpc_prepare_reply_pages(req, args->pages, 0, args->count, |
|
NFS3_readdirres_sz - NFS3_pagepad_sz); |
|
} |
|
|
|
/* |
|
* 3.3.21 COMMIT3args |
|
* |
|
* struct COMMIT3args { |
|
* nfs_fh3 file; |
|
* offset3 offset; |
|
* count3 count; |
|
* }; |
|
*/ |
|
static void encode_commit3args(struct xdr_stream *xdr, |
|
const struct nfs_commitargs *args) |
|
{ |
|
__be32 *p; |
|
|
|
encode_nfs_fh3(xdr, args->fh); |
|
|
|
p = xdr_reserve_space(xdr, 8 + 4); |
|
p = xdr_encode_hyper(p, args->offset); |
|
*p = cpu_to_be32(args->count); |
|
} |
|
|
|
static void nfs3_xdr_enc_commit3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs_commitargs *args = data; |
|
|
|
encode_commit3args(xdr, args); |
|
} |
|
|
|
#ifdef CONFIG_NFS_V3_ACL |
|
|
|
static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_getaclargs *args = data; |
|
|
|
encode_nfs_fh3(xdr, args->fh); |
|
encode_uint32(xdr, args->mask); |
|
if (args->mask & (NFS_ACL | NFS_DFACL)) { |
|
rpc_prepare_reply_pages(req, args->pages, 0, |
|
NFSACL_MAXPAGES << PAGE_SHIFT, |
|
ACL3_getaclres_sz - NFS3_pagepad_sz); |
|
req->rq_rcv_buf.flags |= XDRBUF_SPARSE_PAGES; |
|
} |
|
} |
|
|
|
static void nfs3_xdr_enc_setacl3args(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
const void *data) |
|
{ |
|
const struct nfs3_setaclargs *args = data; |
|
unsigned int base; |
|
int error; |
|
|
|
encode_nfs_fh3(xdr, NFS_FH(args->inode)); |
|
encode_uint32(xdr, args->mask); |
|
|
|
base = req->rq_slen; |
|
if (args->npages != 0) |
|
xdr_write_pages(xdr, args->pages, 0, args->len); |
|
else |
|
xdr_reserve_space(xdr, args->len); |
|
|
|
error = nfsacl_encode(xdr->buf, base, args->inode, |
|
(args->mask & NFS_ACL) ? |
|
args->acl_access : NULL, 1, 0); |
|
/* FIXME: this is just broken */ |
|
BUG_ON(error < 0); |
|
error = nfsacl_encode(xdr->buf, base + error, args->inode, |
|
(args->mask & NFS_DFACL) ? |
|
args->acl_default : NULL, 1, |
|
NFS_ACL_DEFAULT); |
|
BUG_ON(error < 0); |
|
} |
|
|
|
#endif /* CONFIG_NFS_V3_ACL */ |
|
|
|
/* |
|
* NFSv3 XDR decode functions |
|
* |
|
* NFSv3 result types are defined in section 3.3 of RFC 1813: |
|
* "NFS Version 3 Protocol Specification". |
|
*/ |
|
|
|
/* |
|
* 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, |
|
struct xdr_stream *xdr, |
|
void *result) |
|
{ |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_default; |
|
error = decode_fattr3(xdr, result, rpc_rqst_userns(req)); |
|
out: |
|
return error; |
|
out_default: |
|
return nfs3_stat_to_errno(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, |
|
struct xdr_stream *xdr, |
|
void *result) |
|
{ |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_wcc_data(xdr, result, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct user_namespace *userns = rpc_rqst_userns(req); |
|
struct nfs3_diropres *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
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, userns); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result->dir_attr, userns); |
|
out: |
|
return error; |
|
out_default: |
|
error = decode_post_op_attr(xdr, result->dir_attr, userns); |
|
if (unlikely(error)) |
|
goto out; |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs3_accessres *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_default; |
|
error = decode_uint32(xdr, &result->access); |
|
out: |
|
return error; |
|
out_default: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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, |
|
struct xdr_stream *xdr, |
|
void *result) |
|
{ |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_default; |
|
error = decode_nfspath3(xdr); |
|
out: |
|
return error; |
|
out_default: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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_pgio_res *result) |
|
{ |
|
u32 eof, count, ocount, recvd; |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(xdr, 4 + 4 + 4); |
|
if (unlikely(!p)) |
|
return -EIO; |
|
count = be32_to_cpup(p++); |
|
eof = be32_to_cpup(p++); |
|
ocount = be32_to_cpup(p++); |
|
if (unlikely(ocount != count)) |
|
goto out_mismatch; |
|
recvd = xdr_read_pages(xdr, count); |
|
if (unlikely(count > recvd)) |
|
goto out_cheating; |
|
out: |
|
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; |
|
} |
|
|
|
static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs_pgio_res *result = data; |
|
unsigned int pos; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
pos = xdr_stream_pos(xdr); |
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
result->op_status = status; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
result->replen = 3 + ((xdr_stream_pos(xdr) - pos) >> 2); |
|
error = decode_read3resok(xdr, result); |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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_pgio_res *result) |
|
{ |
|
__be32 *p; |
|
|
|
p = xdr_inline_decode(xdr, 4 + 4); |
|
if (unlikely(!p)) |
|
return -EIO; |
|
result->count = be32_to_cpup(p++); |
|
result->verf->committed = be32_to_cpup(p++); |
|
if (unlikely(result->verf->committed > NFS_FILE_SYNC)) |
|
goto out_badvalue; |
|
if (decode_writeverf3(xdr, &result->verf->verifier)) |
|
return -EIO; |
|
return result->count; |
|
out_badvalue: |
|
dprintk("NFS: bad stable_how value: %u\n", result->verf->committed); |
|
return -EIO; |
|
} |
|
|
|
static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs_pgio_res *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
result->op_status = status; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
error = decode_write3resok(xdr, result); |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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, |
|
struct user_namespace *userns) |
|
{ |
|
int error; |
|
|
|
error = decode_post_op_fh3(xdr, result->fh); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result->fattr, userns); |
|
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, userns); |
|
out: |
|
return error; |
|
} |
|
|
|
static int nfs3_xdr_dec_create3res(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct user_namespace *userns = rpc_rqst_userns(req); |
|
struct nfs3_diropres *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_default; |
|
error = decode_create3resok(xdr, result, userns); |
|
out: |
|
return error; |
|
out_default: |
|
error = decode_wcc_data(xdr, result->dir_attr, userns); |
|
if (unlikely(error)) |
|
goto out; |
|
return nfs3_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, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs_removeres *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_wcc_data(xdr, result->dir_attr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct user_namespace *userns = rpc_rqst_userns(req); |
|
struct nfs_renameres *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_wcc_data(xdr, result->old_fattr, userns); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_wcc_data(xdr, result->new_fattr, userns); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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, struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct user_namespace *userns = rpc_rqst_userns(req); |
|
struct nfs3_linkres *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result->fattr, userns); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_wcc_data(xdr, result->dir_attr, userns); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_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 |
|
* @plus: boolean indicating whether this should be a readdirplus entry |
|
* |
|
* Returns zero if successful, otherwise a negative errno value is |
|
* returned. |
|
* |
|
* 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; |
|
* }; |
|
*/ |
|
int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, |
|
bool plus) |
|
{ |
|
struct user_namespace *userns = rpc_userns(entry->server->client); |
|
struct nfs_entry old = *entry; |
|
__be32 *p; |
|
int error; |
|
u64 new_cookie; |
|
|
|
p = xdr_inline_decode(xdr, 4); |
|
if (unlikely(!p)) |
|
return -EAGAIN; |
|
if (*p == xdr_zero) { |
|
p = xdr_inline_decode(xdr, 4); |
|
if (unlikely(!p)) |
|
return -EAGAIN; |
|
if (*p == xdr_zero) |
|
return -EAGAIN; |
|
entry->eof = 1; |
|
return -EBADCOOKIE; |
|
} |
|
|
|
error = decode_fileid3(xdr, &entry->ino); |
|
if (unlikely(error)) |
|
return error; |
|
|
|
error = decode_inline_filename3(xdr, &entry->name, &entry->len); |
|
if (unlikely(error)) |
|
return error; |
|
|
|
error = decode_cookie3(xdr, &new_cookie); |
|
if (unlikely(error)) |
|
return error; |
|
|
|
entry->d_type = DT_UNKNOWN; |
|
|
|
if (plus) { |
|
entry->fattr->valid = 0; |
|
error = decode_post_op_attr(xdr, entry->fattr, userns); |
|
if (unlikely(error)) |
|
return error; |
|
if (entry->fattr->valid & NFS_ATTR_FATTR_V3) |
|
entry->d_type = nfs_umode_to_dtype(entry->fattr->mode); |
|
|
|
if (entry->fattr->fileid != entry->ino) { |
|
entry->fattr->mounted_on_fileid = entry->ino; |
|
entry->fattr->valid |= NFS_ATTR_FATTR_MOUNTED_ON_FILEID; |
|
} |
|
|
|
/* In fact, a post_op_fh3: */ |
|
p = xdr_inline_decode(xdr, 4); |
|
if (unlikely(!p)) |
|
return -EAGAIN; |
|
if (*p != xdr_zero) { |
|
error = decode_nfs_fh3(xdr, entry->fh); |
|
if (unlikely(error)) { |
|
if (error == -E2BIG) |
|
goto out_truncated; |
|
return error; |
|
} |
|
} else |
|
zero_nfs_fh3(entry->fh); |
|
} |
|
|
|
entry->prev_cookie = entry->cookie; |
|
entry->cookie = new_cookie; |
|
|
|
return 0; |
|
|
|
out_truncated: |
|
dprintk("NFS: directory entry contains invalid file handle\n"); |
|
*entry = old; |
|
return -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) |
|
{ |
|
return xdr_read_pages(xdr, xdr->buf->page_len); |
|
} |
|
|
|
static int decode_readdir3resok(struct xdr_stream *xdr, |
|
struct nfs3_readdirres *result, |
|
struct user_namespace *userns) |
|
{ |
|
int error; |
|
|
|
error = decode_post_op_attr(xdr, result->dir_attr, userns); |
|
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, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs3_readdirres *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_default; |
|
error = decode_readdir3resok(xdr, result, rpc_rqst_userns(req)); |
|
out: |
|
return error; |
|
out_default: |
|
error = decode_post_op_attr(xdr, result->dir_attr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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)) |
|
return -EIO; |
|
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; |
|
} |
|
|
|
static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs_fsstat *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
error = decode_fsstat3resok(xdr, result); |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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)) |
|
return -EIO; |
|
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_nfstime3(p, &result->time_delta); |
|
|
|
/* ignore properties */ |
|
result->lease_time = 0; |
|
return 0; |
|
} |
|
|
|
static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs_fsinfo *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
error = decode_fsinfo3resok(xdr, result); |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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)) |
|
return -EIO; |
|
result->max_link = be32_to_cpup(p++); |
|
result->max_namelen = be32_to_cpup(p); |
|
/* ignore remaining fields */ |
|
return 0; |
|
} |
|
|
|
static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs_pathconf *result = data; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
error = decode_pathconf3resok(xdr, result); |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
/* |
|
* 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, |
|
struct xdr_stream *xdr, |
|
void *data) |
|
{ |
|
struct nfs_commitres *result = data; |
|
struct nfs_writeverf *verf = result->verf; |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req)); |
|
if (unlikely(error)) |
|
goto out; |
|
result->op_status = status; |
|
if (status != NFS3_OK) |
|
goto out_status; |
|
error = decode_writeverf3(xdr, &verf->verifier); |
|
if (!error) |
|
verf->committed = NFS_FILE_SYNC; |
|
out: |
|
return error; |
|
out_status: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
#ifdef CONFIG_NFS_V3_ACL |
|
|
|
static inline int decode_getacl3resok(struct xdr_stream *xdr, |
|
struct nfs3_getaclres *result, |
|
struct user_namespace *userns) |
|
{ |
|
struct posix_acl **acl; |
|
unsigned int *aclcnt; |
|
size_t hdrlen; |
|
int error; |
|
|
|
error = decode_post_op_attr(xdr, result->fattr, userns); |
|
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 = xdr_stream_pos(xdr); |
|
|
|
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, |
|
struct xdr_stream *xdr, |
|
void *result) |
|
{ |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_default; |
|
error = decode_getacl3resok(xdr, result, rpc_rqst_userns(req)); |
|
out: |
|
return error; |
|
out_default: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req, |
|
struct xdr_stream *xdr, |
|
void *result) |
|
{ |
|
enum nfs_stat status; |
|
int error; |
|
|
|
error = decode_nfsstat3(xdr, &status); |
|
if (unlikely(error)) |
|
goto out; |
|
if (status != NFS3_OK) |
|
goto out_default; |
|
error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req)); |
|
out: |
|
return error; |
|
out_default: |
|
return nfs3_stat_to_errno(status); |
|
} |
|
|
|
#endif /* CONFIG_NFS_V3_ACL */ |
|
|
|
|
|
/* |
|
* We need to translate between nfs status return values and |
|
* the local errno values which may not be the same. |
|
*/ |
|
static const struct { |
|
int stat; |
|
int errno; |
|
} nfs_errtbl[] = { |
|
{ NFS_OK, 0 }, |
|
{ NFSERR_PERM, -EPERM }, |
|
{ NFSERR_NOENT, -ENOENT }, |
|
{ NFSERR_IO, -errno_NFSERR_IO}, |
|
{ NFSERR_NXIO, -ENXIO }, |
|
/* { NFSERR_EAGAIN, -EAGAIN }, */ |
|
{ NFSERR_ACCES, -EACCES }, |
|
{ NFSERR_EXIST, -EEXIST }, |
|
{ NFSERR_XDEV, -EXDEV }, |
|
{ NFSERR_NODEV, -ENODEV }, |
|
{ NFSERR_NOTDIR, -ENOTDIR }, |
|
{ NFSERR_ISDIR, -EISDIR }, |
|
{ NFSERR_INVAL, -EINVAL }, |
|
{ NFSERR_FBIG, -EFBIG }, |
|
{ NFSERR_NOSPC, -ENOSPC }, |
|
{ NFSERR_ROFS, -EROFS }, |
|
{ NFSERR_MLINK, -EMLINK }, |
|
{ NFSERR_NAMETOOLONG, -ENAMETOOLONG }, |
|
{ NFSERR_NOTEMPTY, -ENOTEMPTY }, |
|
{ NFSERR_DQUOT, -EDQUOT }, |
|
{ NFSERR_STALE, -ESTALE }, |
|
{ NFSERR_REMOTE, -EREMOTE }, |
|
#ifdef EWFLUSH |
|
{ NFSERR_WFLUSH, -EWFLUSH }, |
|
#endif |
|
{ NFSERR_BADHANDLE, -EBADHANDLE }, |
|
{ NFSERR_NOT_SYNC, -ENOTSYNC }, |
|
{ NFSERR_BAD_COOKIE, -EBADCOOKIE }, |
|
{ NFSERR_NOTSUPP, -ENOTSUPP }, |
|
{ NFSERR_TOOSMALL, -ETOOSMALL }, |
|
{ NFSERR_SERVERFAULT, -EREMOTEIO }, |
|
{ NFSERR_BADTYPE, -EBADTYPE }, |
|
{ NFSERR_JUKEBOX, -EJUKEBOX }, |
|
{ -1, -EIO } |
|
}; |
|
|
|
/** |
|
* nfs3_stat_to_errno - convert an NFS status code to a local errno |
|
* @status: NFS status code to convert |
|
* |
|
* Returns a local errno value, or -EIO if the NFS status code is |
|
* not recognized. This function is used jointly by NFSv2 and NFSv3. |
|
*/ |
|
static int nfs3_stat_to_errno(enum nfs_stat status) |
|
{ |
|
int i; |
|
|
|
for (i = 0; nfs_errtbl[i].stat != -1; i++) { |
|
if (nfs_errtbl[i].stat == (int)status) |
|
return nfs_errtbl[i].errno; |
|
} |
|
dprintk("NFS: Unrecognized nfs status value: %u\n", status); |
|
return nfs_errtbl[i].errno; |
|
} |
|
|
|
|
|
#define PROC(proc, argtype, restype, timer) \ |
|
[NFS3PROC_##proc] = { \ |
|
.p_proc = NFS3PROC_##proc, \ |
|
.p_encode = nfs3_xdr_enc_##argtype##3args, \ |
|
.p_decode = nfs3_xdr_dec_##restype##3res, \ |
|
.p_arglen = NFS3_##argtype##args_sz, \ |
|
.p_replen = NFS3_##restype##res_sz, \ |
|
.p_timer = timer, \ |
|
.p_statidx = NFS3PROC_##proc, \ |
|
.p_name = #proc, \ |
|
} |
|
|
|
const struct rpc_procinfo nfs3_procedures[] = { |
|
PROC(GETATTR, getattr, getattr, 1), |
|
PROC(SETATTR, setattr, setattr, 0), |
|
PROC(LOOKUP, lookup, lookup, 2), |
|
PROC(ACCESS, access, access, 1), |
|
PROC(READLINK, readlink, readlink, 3), |
|
PROC(READ, read, read, 3), |
|
PROC(WRITE, write, write, 4), |
|
PROC(CREATE, create, create, 0), |
|
PROC(MKDIR, mkdir, create, 0), |
|
PROC(SYMLINK, symlink, create, 0), |
|
PROC(MKNOD, mknod, create, 0), |
|
PROC(REMOVE, remove, remove, 0), |
|
PROC(RMDIR, lookup, setattr, 0), |
|
PROC(RENAME, rename, rename, 0), |
|
PROC(LINK, link, link, 0), |
|
PROC(READDIR, readdir, readdir, 3), |
|
PROC(READDIRPLUS, readdirplus, readdir, 3), |
|
PROC(FSSTAT, getattr, fsstat, 0), |
|
PROC(FSINFO, getattr, fsinfo, 0), |
|
PROC(PATHCONF, getattr, pathconf, 0), |
|
PROC(COMMIT, commit, commit, 5), |
|
}; |
|
|
|
static unsigned int nfs_version3_counts[ARRAY_SIZE(nfs3_procedures)]; |
|
const struct rpc_version nfs_version3 = { |
|
.number = 3, |
|
.nrprocs = ARRAY_SIZE(nfs3_procedures), |
|
.procs = nfs3_procedures, |
|
.counts = nfs_version3_counts, |
|
}; |
|
|
|
#ifdef CONFIG_NFS_V3_ACL |
|
static const struct rpc_procinfo nfs3_acl_procedures[] = { |
|
[ACLPROC3_GETACL] = { |
|
.p_proc = ACLPROC3_GETACL, |
|
.p_encode = nfs3_xdr_enc_getacl3args, |
|
.p_decode = nfs3_xdr_dec_getacl3res, |
|
.p_arglen = ACL3_getaclargs_sz, |
|
.p_replen = ACL3_getaclres_sz, |
|
.p_timer = 1, |
|
.p_name = "GETACL", |
|
}, |
|
[ACLPROC3_SETACL] = { |
|
.p_proc = ACLPROC3_SETACL, |
|
.p_encode = nfs3_xdr_enc_setacl3args, |
|
.p_decode = nfs3_xdr_dec_setacl3res, |
|
.p_arglen = ACL3_setaclargs_sz, |
|
.p_replen = ACL3_setaclres_sz, |
|
.p_timer = 0, |
|
.p_name = "SETACL", |
|
}, |
|
}; |
|
|
|
static unsigned int nfs3_acl_counts[ARRAY_SIZE(nfs3_acl_procedures)]; |
|
const struct rpc_version nfsacl_version3 = { |
|
.number = 3, |
|
.nrprocs = ARRAY_SIZE(nfs3_acl_procedures), |
|
.procs = nfs3_acl_procedures, |
|
.counts = nfs3_acl_counts, |
|
}; |
|
#endif /* CONFIG_NFS_V3_ACL */
|
|
|