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103cc1fafe
Currently, SUNRPC clears the whole of .pc_argsize before processing each incoming RPC transaction. Add an extra parameter to struct svc_procedure to enable upper layers to reduce the amount of each operation's argument structure that is zeroed by SUNRPC. The size of struct nfsd4_compoundargs, in particular, is a lot to clear on each incoming RPC Call. A subsequent patch will cut this down to something closer to what NFSv2 and NFSv3 uses. This patch should cause no behavior changes. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
1076 lines
28 KiB
C
1076 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Process version 3 NFS requests.
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*
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* Copyright (C) 1996, 1997, 1998 Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/fs.h>
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#include <linux/ext2_fs.h>
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#include <linux/magic.h>
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#include <linux/namei.h>
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#include "cache.h"
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#include "xdr3.h"
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#include "vfs.h"
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#define NFSDDBG_FACILITY NFSDDBG_PROC
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static int nfs3_ftypes[] = {
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0, /* NF3NON */
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S_IFREG, /* NF3REG */
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S_IFDIR, /* NF3DIR */
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S_IFBLK, /* NF3BLK */
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S_IFCHR, /* NF3CHR */
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S_IFLNK, /* NF3LNK */
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S_IFSOCK, /* NF3SOCK */
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S_IFIFO, /* NF3FIFO */
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};
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/*
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* NULL call.
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*/
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static __be32
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nfsd3_proc_null(struct svc_rqst *rqstp)
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{
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return rpc_success;
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}
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/*
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* Get a file's attributes
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*/
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static __be32
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nfsd3_proc_getattr(struct svc_rqst *rqstp)
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{
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struct nfsd_fhandle *argp = rqstp->rq_argp;
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struct nfsd3_attrstat *resp = rqstp->rq_resp;
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dprintk("nfsd: GETATTR(3) %s\n",
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SVCFH_fmt(&argp->fh));
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fh_copy(&resp->fh, &argp->fh);
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resp->status = fh_verify(rqstp, &resp->fh, 0,
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NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
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if (resp->status != nfs_ok)
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goto out;
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resp->status = fh_getattr(&resp->fh, &resp->stat);
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out:
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return rpc_success;
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}
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/*
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* Set a file's attributes
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*/
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static __be32
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nfsd3_proc_setattr(struct svc_rqst *rqstp)
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{
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struct nfsd3_sattrargs *argp = rqstp->rq_argp;
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struct nfsd3_attrstat *resp = rqstp->rq_resp;
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struct nfsd_attrs attrs = {
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.na_iattr = &argp->attrs,
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};
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dprintk("nfsd: SETATTR(3) %s\n",
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SVCFH_fmt(&argp->fh));
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fh_copy(&resp->fh, &argp->fh);
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resp->status = nfsd_setattr(rqstp, &resp->fh, &attrs,
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argp->check_guard, argp->guardtime);
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return rpc_success;
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}
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/*
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* Look up a path name component
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*/
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static __be32
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nfsd3_proc_lookup(struct svc_rqst *rqstp)
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{
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struct nfsd3_diropargs *argp = rqstp->rq_argp;
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struct nfsd3_diropres *resp = rqstp->rq_resp;
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dprintk("nfsd: LOOKUP(3) %s %.*s\n",
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SVCFH_fmt(&argp->fh),
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argp->len,
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argp->name);
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fh_copy(&resp->dirfh, &argp->fh);
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fh_init(&resp->fh, NFS3_FHSIZE);
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resp->status = nfsd_lookup(rqstp, &resp->dirfh,
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argp->name, argp->len,
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&resp->fh);
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return rpc_success;
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}
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/*
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* Check file access
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*/
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static __be32
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nfsd3_proc_access(struct svc_rqst *rqstp)
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{
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struct nfsd3_accessargs *argp = rqstp->rq_argp;
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struct nfsd3_accessres *resp = rqstp->rq_resp;
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dprintk("nfsd: ACCESS(3) %s 0x%x\n",
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SVCFH_fmt(&argp->fh),
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argp->access);
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fh_copy(&resp->fh, &argp->fh);
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resp->access = argp->access;
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resp->status = nfsd_access(rqstp, &resp->fh, &resp->access, NULL);
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return rpc_success;
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}
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/*
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* Read a symlink.
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*/
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static __be32
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nfsd3_proc_readlink(struct svc_rqst *rqstp)
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{
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struct nfsd_fhandle *argp = rqstp->rq_argp;
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struct nfsd3_readlinkres *resp = rqstp->rq_resp;
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dprintk("nfsd: READLINK(3) %s\n", SVCFH_fmt(&argp->fh));
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/* Read the symlink. */
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fh_copy(&resp->fh, &argp->fh);
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resp->len = NFS3_MAXPATHLEN;
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resp->pages = rqstp->rq_next_page++;
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resp->status = nfsd_readlink(rqstp, &resp->fh,
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page_address(*resp->pages), &resp->len);
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return rpc_success;
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}
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/*
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* Read a portion of a file.
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*/
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static __be32
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nfsd3_proc_read(struct svc_rqst *rqstp)
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{
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struct nfsd3_readargs *argp = rqstp->rq_argp;
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struct nfsd3_readres *resp = rqstp->rq_resp;
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unsigned int len;
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int v;
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dprintk("nfsd: READ(3) %s %lu bytes at %Lu\n",
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SVCFH_fmt(&argp->fh),
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(unsigned long) argp->count,
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(unsigned long long) argp->offset);
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argp->count = min_t(u32, argp->count, svc_max_payload(rqstp));
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argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen);
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if (argp->offset > (u64)OFFSET_MAX)
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argp->offset = (u64)OFFSET_MAX;
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if (argp->offset + argp->count > (u64)OFFSET_MAX)
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argp->count = (u64)OFFSET_MAX - argp->offset;
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v = 0;
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len = argp->count;
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resp->pages = rqstp->rq_next_page;
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while (len > 0) {
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struct page *page = *(rqstp->rq_next_page++);
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rqstp->rq_vec[v].iov_base = page_address(page);
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rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
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len -= rqstp->rq_vec[v].iov_len;
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v++;
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}
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/* Obtain buffer pointer for payload.
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* 1 (status) + 22 (post_op_attr) + 1 (count) + 1 (eof)
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* + 1 (xdr opaque byte count) = 26
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*/
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resp->count = argp->count;
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svc_reserve_auth(rqstp, ((1 + NFS3_POST_OP_ATTR_WORDS + 3)<<2) + resp->count +4);
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fh_copy(&resp->fh, &argp->fh);
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resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
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rqstp->rq_vec, v, &resp->count, &resp->eof);
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return rpc_success;
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}
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/*
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* Write data to a file
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*/
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static __be32
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nfsd3_proc_write(struct svc_rqst *rqstp)
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{
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struct nfsd3_writeargs *argp = rqstp->rq_argp;
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struct nfsd3_writeres *resp = rqstp->rq_resp;
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unsigned long cnt = argp->len;
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unsigned int nvecs;
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dprintk("nfsd: WRITE(3) %s %d bytes at %Lu%s\n",
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SVCFH_fmt(&argp->fh),
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argp->len,
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(unsigned long long) argp->offset,
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argp->stable? " stable" : "");
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resp->status = nfserr_fbig;
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if (argp->offset > (u64)OFFSET_MAX ||
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argp->offset + argp->len > (u64)OFFSET_MAX)
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return rpc_success;
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fh_copy(&resp->fh, &argp->fh);
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resp->committed = argp->stable;
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nvecs = svc_fill_write_vector(rqstp, &argp->payload);
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resp->status = nfsd_write(rqstp, &resp->fh, argp->offset,
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rqstp->rq_vec, nvecs, &cnt,
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resp->committed, resp->verf);
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resp->count = cnt;
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return rpc_success;
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}
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/*
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* Implement NFSv3's unchecked, guarded, and exclusive CREATE
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* semantics for regular files. Except for the created file,
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* this operation is stateless on the server.
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*
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* Upon return, caller must release @fhp and @resfhp.
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*/
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static __be32
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nfsd3_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
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struct svc_fh *resfhp, struct nfsd3_createargs *argp)
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{
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struct iattr *iap = &argp->attrs;
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struct dentry *parent, *child;
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struct nfsd_attrs attrs = {
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.na_iattr = iap,
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};
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__u32 v_mtime, v_atime;
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struct inode *inode;
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__be32 status;
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int host_err;
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if (isdotent(argp->name, argp->len))
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return nfserr_exist;
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if (!(iap->ia_valid & ATTR_MODE))
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iap->ia_mode = 0;
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status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_EXEC);
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if (status != nfs_ok)
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return status;
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parent = fhp->fh_dentry;
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inode = d_inode(parent);
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host_err = fh_want_write(fhp);
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if (host_err)
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return nfserrno(host_err);
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inode_lock_nested(inode, I_MUTEX_PARENT);
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child = lookup_one_len(argp->name, parent, argp->len);
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if (IS_ERR(child)) {
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status = nfserrno(PTR_ERR(child));
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goto out;
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}
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if (d_really_is_negative(child)) {
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status = fh_verify(rqstp, fhp, S_IFDIR, NFSD_MAY_CREATE);
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if (status != nfs_ok)
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goto out;
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}
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status = fh_compose(resfhp, fhp->fh_export, child, fhp);
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if (status != nfs_ok)
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goto out;
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v_mtime = 0;
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v_atime = 0;
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if (argp->createmode == NFS3_CREATE_EXCLUSIVE) {
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u32 *verifier = (u32 *)argp->verf;
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/*
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* Solaris 7 gets confused (bugid 4218508) if these have
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* the high bit set, as do xfs filesystems without the
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* "bigtime" feature. So just clear the high bits.
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*/
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v_mtime = verifier[0] & 0x7fffffff;
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v_atime = verifier[1] & 0x7fffffff;
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}
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if (d_really_is_positive(child)) {
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status = nfs_ok;
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switch (argp->createmode) {
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case NFS3_CREATE_UNCHECKED:
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if (!d_is_reg(child))
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break;
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iap->ia_valid &= ATTR_SIZE;
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goto set_attr;
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case NFS3_CREATE_GUARDED:
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status = nfserr_exist;
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break;
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case NFS3_CREATE_EXCLUSIVE:
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if (d_inode(child)->i_mtime.tv_sec == v_mtime &&
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d_inode(child)->i_atime.tv_sec == v_atime &&
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d_inode(child)->i_size == 0) {
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break;
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}
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status = nfserr_exist;
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}
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goto out;
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}
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if (!IS_POSIXACL(inode))
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iap->ia_mode &= ~current_umask();
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fh_fill_pre_attrs(fhp);
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host_err = vfs_create(&init_user_ns, inode, child, iap->ia_mode, true);
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if (host_err < 0) {
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status = nfserrno(host_err);
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goto out;
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}
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fh_fill_post_attrs(fhp);
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/* A newly created file already has a file size of zero. */
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if ((iap->ia_valid & ATTR_SIZE) && (iap->ia_size == 0))
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iap->ia_valid &= ~ATTR_SIZE;
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if (argp->createmode == NFS3_CREATE_EXCLUSIVE) {
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iap->ia_valid = ATTR_MTIME | ATTR_ATIME |
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ATTR_MTIME_SET | ATTR_ATIME_SET;
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iap->ia_mtime.tv_sec = v_mtime;
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iap->ia_atime.tv_sec = v_atime;
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iap->ia_mtime.tv_nsec = 0;
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iap->ia_atime.tv_nsec = 0;
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}
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set_attr:
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status = nfsd_create_setattr(rqstp, fhp, resfhp, &attrs);
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out:
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inode_unlock(inode);
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if (child && !IS_ERR(child))
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dput(child);
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fh_drop_write(fhp);
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return status;
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}
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static __be32
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nfsd3_proc_create(struct svc_rqst *rqstp)
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{
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struct nfsd3_createargs *argp = rqstp->rq_argp;
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struct nfsd3_diropres *resp = rqstp->rq_resp;
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svc_fh *dirfhp, *newfhp;
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dprintk("nfsd: CREATE(3) %s %.*s\n",
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SVCFH_fmt(&argp->fh),
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argp->len,
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argp->name);
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dirfhp = fh_copy(&resp->dirfh, &argp->fh);
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newfhp = fh_init(&resp->fh, NFS3_FHSIZE);
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resp->status = nfsd3_create_file(rqstp, dirfhp, newfhp, argp);
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return rpc_success;
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}
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/*
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* Make directory. This operation is not idempotent.
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*/
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static __be32
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nfsd3_proc_mkdir(struct svc_rqst *rqstp)
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{
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struct nfsd3_createargs *argp = rqstp->rq_argp;
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struct nfsd3_diropres *resp = rqstp->rq_resp;
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struct nfsd_attrs attrs = {
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.na_iattr = &argp->attrs,
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};
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dprintk("nfsd: MKDIR(3) %s %.*s\n",
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SVCFH_fmt(&argp->fh),
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argp->len,
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argp->name);
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argp->attrs.ia_valid &= ~ATTR_SIZE;
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fh_copy(&resp->dirfh, &argp->fh);
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fh_init(&resp->fh, NFS3_FHSIZE);
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resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
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&attrs, S_IFDIR, 0, &resp->fh);
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return rpc_success;
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}
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static __be32
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nfsd3_proc_symlink(struct svc_rqst *rqstp)
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{
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struct nfsd3_symlinkargs *argp = rqstp->rq_argp;
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struct nfsd3_diropres *resp = rqstp->rq_resp;
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struct nfsd_attrs attrs = {
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.na_iattr = &argp->attrs,
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};
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if (argp->tlen == 0) {
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resp->status = nfserr_inval;
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goto out;
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}
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if (argp->tlen > NFS3_MAXPATHLEN) {
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resp->status = nfserr_nametoolong;
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goto out;
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}
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argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
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page_address(rqstp->rq_arg.pages[0]),
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argp->tlen);
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if (IS_ERR(argp->tname)) {
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resp->status = nfserrno(PTR_ERR(argp->tname));
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goto out;
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}
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dprintk("nfsd: SYMLINK(3) %s %.*s -> %.*s\n",
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SVCFH_fmt(&argp->ffh),
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argp->flen, argp->fname,
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argp->tlen, argp->tname);
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fh_copy(&resp->dirfh, &argp->ffh);
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fh_init(&resp->fh, NFS3_FHSIZE);
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resp->status = nfsd_symlink(rqstp, &resp->dirfh, argp->fname,
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argp->flen, argp->tname, &attrs, &resp->fh);
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kfree(argp->tname);
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out:
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return rpc_success;
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}
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/*
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* Make socket/fifo/device.
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*/
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static __be32
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nfsd3_proc_mknod(struct svc_rqst *rqstp)
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{
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struct nfsd3_mknodargs *argp = rqstp->rq_argp;
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struct nfsd3_diropres *resp = rqstp->rq_resp;
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struct nfsd_attrs attrs = {
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.na_iattr = &argp->attrs,
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};
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int type;
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dev_t rdev = 0;
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dprintk("nfsd: MKNOD(3) %s %.*s\n",
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SVCFH_fmt(&argp->fh),
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argp->len,
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argp->name);
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fh_copy(&resp->dirfh, &argp->fh);
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fh_init(&resp->fh, NFS3_FHSIZE);
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if (argp->ftype == NF3CHR || argp->ftype == NF3BLK) {
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rdev = MKDEV(argp->major, argp->minor);
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if (MAJOR(rdev) != argp->major ||
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MINOR(rdev) != argp->minor) {
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resp->status = nfserr_inval;
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goto out;
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}
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} else if (argp->ftype != NF3SOCK && argp->ftype != NF3FIFO) {
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resp->status = nfserr_badtype;
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goto out;
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}
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|
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type = nfs3_ftypes[argp->ftype];
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|
resp->status = nfsd_create(rqstp, &resp->dirfh, argp->name, argp->len,
|
|
&attrs, type, rdev, &resp->fh);
|
|
out:
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Remove file/fifo/socket etc.
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_remove(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_diropargs *argp = rqstp->rq_argp;
|
|
struct nfsd3_attrstat *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: REMOVE(3) %s %.*s\n",
|
|
SVCFH_fmt(&argp->fh),
|
|
argp->len,
|
|
argp->name);
|
|
|
|
/* Unlink. -S_IFDIR means file must not be a directory */
|
|
fh_copy(&resp->fh, &argp->fh);
|
|
resp->status = nfsd_unlink(rqstp, &resp->fh, -S_IFDIR,
|
|
argp->name, argp->len);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Remove a directory
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_rmdir(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_diropargs *argp = rqstp->rq_argp;
|
|
struct nfsd3_attrstat *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: RMDIR(3) %s %.*s\n",
|
|
SVCFH_fmt(&argp->fh),
|
|
argp->len,
|
|
argp->name);
|
|
|
|
fh_copy(&resp->fh, &argp->fh);
|
|
resp->status = nfsd_unlink(rqstp, &resp->fh, S_IFDIR,
|
|
argp->name, argp->len);
|
|
return rpc_success;
|
|
}
|
|
|
|
static __be32
|
|
nfsd3_proc_rename(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_renameargs *argp = rqstp->rq_argp;
|
|
struct nfsd3_renameres *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: RENAME(3) %s %.*s ->\n",
|
|
SVCFH_fmt(&argp->ffh),
|
|
argp->flen,
|
|
argp->fname);
|
|
dprintk("nfsd: -> %s %.*s\n",
|
|
SVCFH_fmt(&argp->tfh),
|
|
argp->tlen,
|
|
argp->tname);
|
|
|
|
fh_copy(&resp->ffh, &argp->ffh);
|
|
fh_copy(&resp->tfh, &argp->tfh);
|
|
resp->status = nfsd_rename(rqstp, &resp->ffh, argp->fname, argp->flen,
|
|
&resp->tfh, argp->tname, argp->tlen);
|
|
return rpc_success;
|
|
}
|
|
|
|
static __be32
|
|
nfsd3_proc_link(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_linkargs *argp = rqstp->rq_argp;
|
|
struct nfsd3_linkres *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: LINK(3) %s ->\n",
|
|
SVCFH_fmt(&argp->ffh));
|
|
dprintk("nfsd: -> %s %.*s\n",
|
|
SVCFH_fmt(&argp->tfh),
|
|
argp->tlen,
|
|
argp->tname);
|
|
|
|
fh_copy(&resp->fh, &argp->ffh);
|
|
fh_copy(&resp->tfh, &argp->tfh);
|
|
resp->status = nfsd_link(rqstp, &resp->tfh, argp->tname, argp->tlen,
|
|
&resp->fh);
|
|
return rpc_success;
|
|
}
|
|
|
|
static void nfsd3_init_dirlist_pages(struct svc_rqst *rqstp,
|
|
struct nfsd3_readdirres *resp,
|
|
u32 count)
|
|
{
|
|
struct xdr_buf *buf = &resp->dirlist;
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
unsigned int sendbuf = min_t(unsigned int, rqstp->rq_res.buflen,
|
|
svc_max_payload(rqstp));
|
|
|
|
memset(buf, 0, sizeof(*buf));
|
|
|
|
/* Reserve room for the NULL ptr & eof flag (-2 words) */
|
|
buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), sendbuf);
|
|
buf->buflen -= XDR_UNIT * 2;
|
|
buf->pages = rqstp->rq_next_page;
|
|
rqstp->rq_next_page += (buf->buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
|
|
|
|
/* This is xdr_init_encode(), but it assumes that
|
|
* the head kvec has already been consumed. */
|
|
xdr_set_scratch_buffer(xdr, NULL, 0);
|
|
xdr->buf = buf;
|
|
xdr->page_ptr = buf->pages;
|
|
xdr->iov = NULL;
|
|
xdr->p = page_address(*buf->pages);
|
|
xdr->end = (void *)xdr->p + min_t(u32, buf->buflen, PAGE_SIZE);
|
|
xdr->rqst = NULL;
|
|
}
|
|
|
|
/*
|
|
* Read a portion of a directory.
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_readdir(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_readdirargs *argp = rqstp->rq_argp;
|
|
struct nfsd3_readdirres *resp = rqstp->rq_resp;
|
|
loff_t offset;
|
|
|
|
dprintk("nfsd: READDIR(3) %s %d bytes at %d\n",
|
|
SVCFH_fmt(&argp->fh),
|
|
argp->count, (u32) argp->cookie);
|
|
|
|
nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
|
|
|
|
fh_copy(&resp->fh, &argp->fh);
|
|
resp->common.err = nfs_ok;
|
|
resp->cookie_offset = 0;
|
|
resp->rqstp = rqstp;
|
|
offset = argp->cookie;
|
|
resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
|
|
&resp->common, nfs3svc_encode_entry3);
|
|
memcpy(resp->verf, argp->verf, 8);
|
|
nfs3svc_encode_cookie3(resp, offset);
|
|
|
|
/* Recycle only pages that were part of the reply */
|
|
rqstp->rq_next_page = resp->xdr.page_ptr + 1;
|
|
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Read a portion of a directory, including file handles and attrs.
|
|
* For now, we choose to ignore the dircount parameter.
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_readdirargs *argp = rqstp->rq_argp;
|
|
struct nfsd3_readdirres *resp = rqstp->rq_resp;
|
|
loff_t offset;
|
|
|
|
dprintk("nfsd: READDIR+(3) %s %d bytes at %d\n",
|
|
SVCFH_fmt(&argp->fh),
|
|
argp->count, (u32) argp->cookie);
|
|
|
|
nfsd3_init_dirlist_pages(rqstp, resp, argp->count);
|
|
|
|
fh_copy(&resp->fh, &argp->fh);
|
|
resp->common.err = nfs_ok;
|
|
resp->cookie_offset = 0;
|
|
resp->rqstp = rqstp;
|
|
offset = argp->cookie;
|
|
|
|
resp->status = fh_verify(rqstp, &resp->fh, S_IFDIR, NFSD_MAY_NOP);
|
|
if (resp->status != nfs_ok)
|
|
goto out;
|
|
|
|
if (resp->fh.fh_export->ex_flags & NFSEXP_NOREADDIRPLUS) {
|
|
resp->status = nfserr_notsupp;
|
|
goto out;
|
|
}
|
|
|
|
resp->status = nfsd_readdir(rqstp, &resp->fh, &offset,
|
|
&resp->common, nfs3svc_encode_entryplus3);
|
|
memcpy(resp->verf, argp->verf, 8);
|
|
nfs3svc_encode_cookie3(resp, offset);
|
|
|
|
/* Recycle only pages that were part of the reply */
|
|
rqstp->rq_next_page = resp->xdr.page_ptr + 1;
|
|
|
|
out:
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Get file system stats
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_fsstat(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd_fhandle *argp = rqstp->rq_argp;
|
|
struct nfsd3_fsstatres *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: FSSTAT(3) %s\n",
|
|
SVCFH_fmt(&argp->fh));
|
|
|
|
resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, 0);
|
|
fh_put(&argp->fh);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Get file system info
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd_fhandle *argp = rqstp->rq_argp;
|
|
struct nfsd3_fsinfores *resp = rqstp->rq_resp;
|
|
u32 max_blocksize = svc_max_payload(rqstp);
|
|
|
|
dprintk("nfsd: FSINFO(3) %s\n",
|
|
SVCFH_fmt(&argp->fh));
|
|
|
|
resp->f_rtmax = max_blocksize;
|
|
resp->f_rtpref = max_blocksize;
|
|
resp->f_rtmult = PAGE_SIZE;
|
|
resp->f_wtmax = max_blocksize;
|
|
resp->f_wtpref = max_blocksize;
|
|
resp->f_wtmult = PAGE_SIZE;
|
|
resp->f_dtpref = max_blocksize;
|
|
resp->f_maxfilesize = ~(u32) 0;
|
|
resp->f_properties = NFS3_FSF_DEFAULT;
|
|
|
|
resp->status = fh_verify(rqstp, &argp->fh, 0,
|
|
NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
|
|
|
|
/* Check special features of the file system. May request
|
|
* different read/write sizes for file systems known to have
|
|
* problems with large blocks */
|
|
if (resp->status == nfs_ok) {
|
|
struct super_block *sb = argp->fh.fh_dentry->d_sb;
|
|
|
|
/* Note that we don't care for remote fs's here */
|
|
if (sb->s_magic == MSDOS_SUPER_MAGIC) {
|
|
resp->f_properties = NFS3_FSF_BILLYBOY;
|
|
}
|
|
resp->f_maxfilesize = sb->s_maxbytes;
|
|
}
|
|
|
|
fh_put(&argp->fh);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Get pathconf info for the specified file
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_pathconf(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd_fhandle *argp = rqstp->rq_argp;
|
|
struct nfsd3_pathconfres *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: PATHCONF(3) %s\n",
|
|
SVCFH_fmt(&argp->fh));
|
|
|
|
/* Set default pathconf */
|
|
resp->p_link_max = 255; /* at least */
|
|
resp->p_name_max = 255; /* at least */
|
|
resp->p_no_trunc = 0;
|
|
resp->p_chown_restricted = 1;
|
|
resp->p_case_insensitive = 0;
|
|
resp->p_case_preserving = 1;
|
|
|
|
resp->status = fh_verify(rqstp, &argp->fh, 0, NFSD_MAY_NOP);
|
|
|
|
if (resp->status == nfs_ok) {
|
|
struct super_block *sb = argp->fh.fh_dentry->d_sb;
|
|
|
|
/* Note that we don't care for remote fs's here */
|
|
switch (sb->s_magic) {
|
|
case EXT2_SUPER_MAGIC:
|
|
resp->p_link_max = EXT2_LINK_MAX;
|
|
resp->p_name_max = EXT2_NAME_LEN;
|
|
break;
|
|
case MSDOS_SUPER_MAGIC:
|
|
resp->p_case_insensitive = 1;
|
|
resp->p_case_preserving = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
fh_put(&argp->fh);
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Commit a file (range) to stable storage.
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_commit(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd3_commitargs *argp = rqstp->rq_argp;
|
|
struct nfsd3_commitres *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: COMMIT(3) %s %u@%Lu\n",
|
|
SVCFH_fmt(&argp->fh),
|
|
argp->count,
|
|
(unsigned long long) argp->offset);
|
|
|
|
fh_copy(&resp->fh, &argp->fh);
|
|
resp->status = nfsd_commit(rqstp, &resp->fh, argp->offset,
|
|
argp->count, resp->verf);
|
|
return rpc_success;
|
|
}
|
|
|
|
|
|
/*
|
|
* NFSv3 Server procedures.
|
|
* Only the results of non-idempotent operations are cached.
|
|
*/
|
|
#define nfs3svc_encode_attrstatres nfs3svc_encode_attrstat
|
|
#define nfs3svc_encode_wccstatres nfs3svc_encode_wccstat
|
|
#define nfsd3_mkdirargs nfsd3_createargs
|
|
#define nfsd3_readdirplusargs nfsd3_readdirargs
|
|
#define nfsd3_fhandleargs nfsd_fhandle
|
|
#define nfsd3_attrstatres nfsd3_attrstat
|
|
#define nfsd3_wccstatres nfsd3_attrstat
|
|
#define nfsd3_createres nfsd3_diropres
|
|
|
|
#define ST 1 /* status*/
|
|
#define FH 17 /* filehandle with length */
|
|
#define AT 21 /* attributes */
|
|
#define pAT (1+AT) /* post attributes - conditional */
|
|
#define WC (7+pAT) /* WCC attributes */
|
|
|
|
static const struct svc_procedure nfsd_procedures3[22] = {
|
|
[NFS3PROC_NULL] = {
|
|
.pc_func = nfsd3_proc_null,
|
|
.pc_decode = nfssvc_decode_voidarg,
|
|
.pc_encode = nfssvc_encode_voidres,
|
|
.pc_argsize = sizeof(struct nfsd_voidargs),
|
|
.pc_argzero = sizeof(struct nfsd_voidargs),
|
|
.pc_ressize = sizeof(struct nfsd_voidres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST,
|
|
.pc_name = "NULL",
|
|
},
|
|
[NFS3PROC_GETATTR] = {
|
|
.pc_func = nfsd3_proc_getattr,
|
|
.pc_decode = nfs3svc_decode_fhandleargs,
|
|
.pc_encode = nfs3svc_encode_getattrres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd_fhandle),
|
|
.pc_argzero = sizeof(struct nfsd_fhandle),
|
|
.pc_ressize = sizeof(struct nfsd3_attrstatres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+AT,
|
|
.pc_name = "GETATTR",
|
|
},
|
|
[NFS3PROC_SETATTR] = {
|
|
.pc_func = nfsd3_proc_setattr,
|
|
.pc_decode = nfs3svc_decode_sattrargs,
|
|
.pc_encode = nfs3svc_encode_wccstatres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_sattrargs),
|
|
.pc_argzero = sizeof(struct nfsd3_sattrargs),
|
|
.pc_ressize = sizeof(struct nfsd3_wccstatres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+WC,
|
|
.pc_name = "SETATTR",
|
|
},
|
|
[NFS3PROC_LOOKUP] = {
|
|
.pc_func = nfsd3_proc_lookup,
|
|
.pc_decode = nfs3svc_decode_diropargs,
|
|
.pc_encode = nfs3svc_encode_lookupres,
|
|
.pc_release = nfs3svc_release_fhandle2,
|
|
.pc_argsize = sizeof(struct nfsd3_diropargs),
|
|
.pc_argzero = sizeof(struct nfsd3_diropargs),
|
|
.pc_ressize = sizeof(struct nfsd3_diropres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+FH+pAT+pAT,
|
|
.pc_name = "LOOKUP",
|
|
},
|
|
[NFS3PROC_ACCESS] = {
|
|
.pc_func = nfsd3_proc_access,
|
|
.pc_decode = nfs3svc_decode_accessargs,
|
|
.pc_encode = nfs3svc_encode_accessres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_accessargs),
|
|
.pc_argzero = sizeof(struct nfsd3_accessargs),
|
|
.pc_ressize = sizeof(struct nfsd3_accessres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+pAT+1,
|
|
.pc_name = "ACCESS",
|
|
},
|
|
[NFS3PROC_READLINK] = {
|
|
.pc_func = nfsd3_proc_readlink,
|
|
.pc_decode = nfs3svc_decode_fhandleargs,
|
|
.pc_encode = nfs3svc_encode_readlinkres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd_fhandle),
|
|
.pc_argzero = sizeof(struct nfsd_fhandle),
|
|
.pc_ressize = sizeof(struct nfsd3_readlinkres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+pAT+1+NFS3_MAXPATHLEN/4,
|
|
.pc_name = "READLINK",
|
|
},
|
|
[NFS3PROC_READ] = {
|
|
.pc_func = nfsd3_proc_read,
|
|
.pc_decode = nfs3svc_decode_readargs,
|
|
.pc_encode = nfs3svc_encode_readres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_readargs),
|
|
.pc_argzero = sizeof(struct nfsd3_readargs),
|
|
.pc_ressize = sizeof(struct nfsd3_readres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+pAT+4+NFSSVC_MAXBLKSIZE/4,
|
|
.pc_name = "READ",
|
|
},
|
|
[NFS3PROC_WRITE] = {
|
|
.pc_func = nfsd3_proc_write,
|
|
.pc_decode = nfs3svc_decode_writeargs,
|
|
.pc_encode = nfs3svc_encode_writeres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_writeargs),
|
|
.pc_argzero = sizeof(struct nfsd3_writeargs),
|
|
.pc_ressize = sizeof(struct nfsd3_writeres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+WC+4,
|
|
.pc_name = "WRITE",
|
|
},
|
|
[NFS3PROC_CREATE] = {
|
|
.pc_func = nfsd3_proc_create,
|
|
.pc_decode = nfs3svc_decode_createargs,
|
|
.pc_encode = nfs3svc_encode_createres,
|
|
.pc_release = nfs3svc_release_fhandle2,
|
|
.pc_argsize = sizeof(struct nfsd3_createargs),
|
|
.pc_argzero = sizeof(struct nfsd3_createargs),
|
|
.pc_ressize = sizeof(struct nfsd3_createres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+(1+FH+pAT)+WC,
|
|
.pc_name = "CREATE",
|
|
},
|
|
[NFS3PROC_MKDIR] = {
|
|
.pc_func = nfsd3_proc_mkdir,
|
|
.pc_decode = nfs3svc_decode_mkdirargs,
|
|
.pc_encode = nfs3svc_encode_createres,
|
|
.pc_release = nfs3svc_release_fhandle2,
|
|
.pc_argsize = sizeof(struct nfsd3_mkdirargs),
|
|
.pc_argzero = sizeof(struct nfsd3_mkdirargs),
|
|
.pc_ressize = sizeof(struct nfsd3_createres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+(1+FH+pAT)+WC,
|
|
.pc_name = "MKDIR",
|
|
},
|
|
[NFS3PROC_SYMLINK] = {
|
|
.pc_func = nfsd3_proc_symlink,
|
|
.pc_decode = nfs3svc_decode_symlinkargs,
|
|
.pc_encode = nfs3svc_encode_createres,
|
|
.pc_release = nfs3svc_release_fhandle2,
|
|
.pc_argsize = sizeof(struct nfsd3_symlinkargs),
|
|
.pc_argzero = sizeof(struct nfsd3_symlinkargs),
|
|
.pc_ressize = sizeof(struct nfsd3_createres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+(1+FH+pAT)+WC,
|
|
.pc_name = "SYMLINK",
|
|
},
|
|
[NFS3PROC_MKNOD] = {
|
|
.pc_func = nfsd3_proc_mknod,
|
|
.pc_decode = nfs3svc_decode_mknodargs,
|
|
.pc_encode = nfs3svc_encode_createres,
|
|
.pc_release = nfs3svc_release_fhandle2,
|
|
.pc_argsize = sizeof(struct nfsd3_mknodargs),
|
|
.pc_argzero = sizeof(struct nfsd3_mknodargs),
|
|
.pc_ressize = sizeof(struct nfsd3_createres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+(1+FH+pAT)+WC,
|
|
.pc_name = "MKNOD",
|
|
},
|
|
[NFS3PROC_REMOVE] = {
|
|
.pc_func = nfsd3_proc_remove,
|
|
.pc_decode = nfs3svc_decode_diropargs,
|
|
.pc_encode = nfs3svc_encode_wccstatres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_diropargs),
|
|
.pc_argzero = sizeof(struct nfsd3_diropargs),
|
|
.pc_ressize = sizeof(struct nfsd3_wccstatres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+WC,
|
|
.pc_name = "REMOVE",
|
|
},
|
|
[NFS3PROC_RMDIR] = {
|
|
.pc_func = nfsd3_proc_rmdir,
|
|
.pc_decode = nfs3svc_decode_diropargs,
|
|
.pc_encode = nfs3svc_encode_wccstatres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_diropargs),
|
|
.pc_argzero = sizeof(struct nfsd3_diropargs),
|
|
.pc_ressize = sizeof(struct nfsd3_wccstatres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+WC,
|
|
.pc_name = "RMDIR",
|
|
},
|
|
[NFS3PROC_RENAME] = {
|
|
.pc_func = nfsd3_proc_rename,
|
|
.pc_decode = nfs3svc_decode_renameargs,
|
|
.pc_encode = nfs3svc_encode_renameres,
|
|
.pc_release = nfs3svc_release_fhandle2,
|
|
.pc_argsize = sizeof(struct nfsd3_renameargs),
|
|
.pc_argzero = sizeof(struct nfsd3_renameargs),
|
|
.pc_ressize = sizeof(struct nfsd3_renameres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+WC+WC,
|
|
.pc_name = "RENAME",
|
|
},
|
|
[NFS3PROC_LINK] = {
|
|
.pc_func = nfsd3_proc_link,
|
|
.pc_decode = nfs3svc_decode_linkargs,
|
|
.pc_encode = nfs3svc_encode_linkres,
|
|
.pc_release = nfs3svc_release_fhandle2,
|
|
.pc_argsize = sizeof(struct nfsd3_linkargs),
|
|
.pc_argzero = sizeof(struct nfsd3_linkargs),
|
|
.pc_ressize = sizeof(struct nfsd3_linkres),
|
|
.pc_cachetype = RC_REPLBUFF,
|
|
.pc_xdrressize = ST+pAT+WC,
|
|
.pc_name = "LINK",
|
|
},
|
|
[NFS3PROC_READDIR] = {
|
|
.pc_func = nfsd3_proc_readdir,
|
|
.pc_decode = nfs3svc_decode_readdirargs,
|
|
.pc_encode = nfs3svc_encode_readdirres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_readdirargs),
|
|
.pc_argzero = sizeof(struct nfsd3_readdirargs),
|
|
.pc_ressize = sizeof(struct nfsd3_readdirres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_name = "READDIR",
|
|
},
|
|
[NFS3PROC_READDIRPLUS] = {
|
|
.pc_func = nfsd3_proc_readdirplus,
|
|
.pc_decode = nfs3svc_decode_readdirplusargs,
|
|
.pc_encode = nfs3svc_encode_readdirres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_readdirplusargs),
|
|
.pc_argzero = sizeof(struct nfsd3_readdirplusargs),
|
|
.pc_ressize = sizeof(struct nfsd3_readdirres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_name = "READDIRPLUS",
|
|
},
|
|
[NFS3PROC_FSSTAT] = {
|
|
.pc_func = nfsd3_proc_fsstat,
|
|
.pc_decode = nfs3svc_decode_fhandleargs,
|
|
.pc_encode = nfs3svc_encode_fsstatres,
|
|
.pc_argsize = sizeof(struct nfsd3_fhandleargs),
|
|
.pc_argzero = sizeof(struct nfsd3_fhandleargs),
|
|
.pc_ressize = sizeof(struct nfsd3_fsstatres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+pAT+2*6+1,
|
|
.pc_name = "FSSTAT",
|
|
},
|
|
[NFS3PROC_FSINFO] = {
|
|
.pc_func = nfsd3_proc_fsinfo,
|
|
.pc_decode = nfs3svc_decode_fhandleargs,
|
|
.pc_encode = nfs3svc_encode_fsinfores,
|
|
.pc_argsize = sizeof(struct nfsd3_fhandleargs),
|
|
.pc_argzero = sizeof(struct nfsd3_fhandleargs),
|
|
.pc_ressize = sizeof(struct nfsd3_fsinfores),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+pAT+12,
|
|
.pc_name = "FSINFO",
|
|
},
|
|
[NFS3PROC_PATHCONF] = {
|
|
.pc_func = nfsd3_proc_pathconf,
|
|
.pc_decode = nfs3svc_decode_fhandleargs,
|
|
.pc_encode = nfs3svc_encode_pathconfres,
|
|
.pc_argsize = sizeof(struct nfsd3_fhandleargs),
|
|
.pc_argzero = sizeof(struct nfsd3_fhandleargs),
|
|
.pc_ressize = sizeof(struct nfsd3_pathconfres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+pAT+6,
|
|
.pc_name = "PATHCONF",
|
|
},
|
|
[NFS3PROC_COMMIT] = {
|
|
.pc_func = nfsd3_proc_commit,
|
|
.pc_decode = nfs3svc_decode_commitargs,
|
|
.pc_encode = nfs3svc_encode_commitres,
|
|
.pc_release = nfs3svc_release_fhandle,
|
|
.pc_argsize = sizeof(struct nfsd3_commitargs),
|
|
.pc_argzero = sizeof(struct nfsd3_commitargs),
|
|
.pc_ressize = sizeof(struct nfsd3_commitres),
|
|
.pc_cachetype = RC_NOCACHE,
|
|
.pc_xdrressize = ST+WC+2,
|
|
.pc_name = "COMMIT",
|
|
},
|
|
};
|
|
|
|
static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures3)];
|
|
const struct svc_version nfsd_version3 = {
|
|
.vs_vers = 3,
|
|
.vs_nproc = 22,
|
|
.vs_proc = nfsd_procedures3,
|
|
.vs_dispatch = nfsd_dispatch,
|
|
.vs_count = nfsd_count3,
|
|
.vs_xdrsize = NFS3_SVC_XDRSIZE,
|
|
};
|