nfsproc.c (ebcd8e8b28535b643a4c06685bd363b3b73a96af) nfsproc.c (8c293ef993c8df0b1bea9ecb0de6eb96dec3ac9d)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Process version 2 NFS requests.
4 *
5 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
6 */
7
8#include <linux/namei.h>

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166 * Read a portion of a file.
167 * N.B. After this call resp->fh needs an fh_put
168 */
169static __be32
170nfsd_proc_read(struct svc_rqst *rqstp)
171{
172 struct nfsd_readargs *argp = rqstp->rq_argp;
173 struct nfsd_readres *resp = rqstp->rq_resp;
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Process version 2 NFS requests.
4 *
5 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
6 */
7
8#include <linux/namei.h>

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166 * Read a portion of a file.
167 * N.B. After this call resp->fh needs an fh_put
168 */
169static __be32
170nfsd_proc_read(struct svc_rqst *rqstp)
171{
172 struct nfsd_readargs *argp = rqstp->rq_argp;
173 struct nfsd_readres *resp = rqstp->rq_resp;
174 unsigned int len;
174 u32 eof;
175 u32 eof;
176 int v;
175
176 dprintk("nfsd: READ %s %d bytes at %d\n",
177 SVCFH_fmt(&argp->fh),
178 argp->count, argp->offset);
179
177
178 dprintk("nfsd: READ %s %d bytes at %d\n",
179 SVCFH_fmt(&argp->fh),
180 argp->count, argp->offset);
181
182 argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2);
183
184 v = 0;
185 len = argp->count;
186 while (len > 0) {
187 struct page *page = *(rqstp->rq_next_page++);
188
189 rqstp->rq_vec[v].iov_base = page_address(page);
190 rqstp->rq_vec[v].iov_len = min_t(unsigned int, len, PAGE_SIZE);
191 len -= rqstp->rq_vec[v].iov_len;
192 v++;
193 }
194
180 /* Obtain buffer pointer for payload. 19 is 1 word for
181 * status, 17 words for fattr, and 1 word for the byte count.
182 */
195 /* Obtain buffer pointer for payload. 19 is 1 word for
196 * status, 17 words for fattr, and 1 word for the byte count.
197 */
183
184 if (NFSSVC_MAXBLKSIZE_V2 < argp->count) {
185 char buf[RPC_MAX_ADDRBUFLEN];
186 printk(KERN_NOTICE
187 "oversized read request from %s (%d bytes)\n",
188 svc_print_addr(rqstp, buf, sizeof(buf)),
189 argp->count);
190 argp->count = NFSSVC_MAXBLKSIZE_V2;
191 }
192 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
193
194 resp->count = argp->count;
198 svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
199
200 resp->count = argp->count;
195 resp->status = nfsd_read(rqstp, fh_copy(&resp->fh, &argp->fh),
196 argp->offset,
197 rqstp->rq_vec, argp->vlen,
198 &resp->count,
199 &eof);
201 fh_copy(&resp->fh, &argp->fh);
202 resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
203 rqstp->rq_vec, v, &resp->count, &eof);
200 if (resp->status == nfs_ok)
201 resp->status = fh_getattr(&resp->fh, &resp->stat);
202 else if (resp->status == nfserr_jukebox)
203 return rpc_drop_reply;
204 return rpc_success;
205}
206
207/* Reserved */

--- 666 unchanged lines hidden --- 		204 if (resp->status == nfs_ok)
205 resp->status = fh_getattr(&resp->fh, &resp->stat);
206 else if (resp->status == nfserr_jukebox)
207 return rpc_drop_reply;
208 return rpc_success;
209}
210
211/* Reserved */

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