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885 lines
23 KiB
885 lines
23 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Process version 2 NFS requests. |
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* |
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* Copyright (C) 1995-1997 Olaf Kirch <[email protected]> |
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*/ |
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|
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#include <linux/namei.h> |
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|
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#include "cache.h" |
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#include "xdr.h" |
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#include "vfs.h" |
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|
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#define NFSDDBG_FACILITY NFSDDBG_PROC |
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|
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static __be32 |
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nfsd_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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/* |
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* Get a file's attributes |
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* N.B. After this call resp->fh needs an fh_put |
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*/ |
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static __be32 |
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nfsd_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 nfsd_attrstat *resp = rqstp->rq_resp; |
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dprintk("nfsd: GETATTR %s\n", 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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* N.B. After this call resp->fh needs an fh_put |
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*/ |
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static __be32 |
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nfsd_proc_setattr(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_sattrargs *argp = rqstp->rq_argp; |
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struct nfsd_attrstat *resp = rqstp->rq_resp; |
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struct iattr *iap = &argp->attrs; |
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struct svc_fh *fhp; |
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dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n", |
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SVCFH_fmt(&argp->fh), |
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argp->attrs.ia_valid, (long) argp->attrs.ia_size); |
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fhp = fh_copy(&resp->fh, &argp->fh); |
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|
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/* |
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* NFSv2 does not differentiate between "set-[ac]time-to-now" |
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* which only requires access, and "set-[ac]time-to-X" which |
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* requires ownership. |
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* So if it looks like it might be "set both to the same time which |
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* is close to now", and if setattr_prepare fails, then we |
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* convert to "set to now" instead of "set to explicit time" |
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* |
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* We only call setattr_prepare as the last test as technically |
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* it is not an interface that we should be using. |
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*/ |
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#define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET) |
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#define MAX_TOUCH_TIME_ERROR (30*60) |
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if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET && |
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iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) { |
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/* |
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* Looks probable. |
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* |
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* Now just make sure time is in the right ballpark. |
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* Solaris, at least, doesn't seem to care what the time |
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* request is. We require it be within 30 minutes of now. |
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*/ |
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time64_t delta = iap->ia_atime.tv_sec - ktime_get_real_seconds(); |
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resp->status = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP); |
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if (resp->status != nfs_ok) |
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goto out; |
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if (delta < 0) |
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delta = -delta; |
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if (delta < MAX_TOUCH_TIME_ERROR && |
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setattr_prepare(&init_user_ns, fhp->fh_dentry, iap) != 0) { |
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/* |
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* Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME. |
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* This will cause notify_change to set these times |
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* to "now" |
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*/ |
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iap->ia_valid &= ~BOTH_TIME_SET; |
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} |
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} |
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resp->status = nfsd_setattr(rqstp, fhp, iap, 0, (time64_t)0); |
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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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/* Obsolete, replaced by MNTPROC_MNT. */ |
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static __be32 |
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nfsd_proc_root(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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* Look up a path name component |
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* Note: the dentry in the resp->fh may be negative if the file |
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* doesn't exist yet. |
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* N.B. After this call resp->fh needs an fh_put |
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*/ |
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static __be32 |
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nfsd_proc_lookup(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_diropargs *argp = rqstp->rq_argp; |
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struct nfsd_diropres *resp = rqstp->rq_resp; |
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dprintk("nfsd: LOOKUP %s %.*s\n", |
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SVCFH_fmt(&argp->fh), argp->len, argp->name); |
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fh_init(&resp->fh, NFS_FHSIZE); |
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resp->status = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len, |
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&resp->fh); |
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fh_put(&argp->fh); |
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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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* Read a symlink. |
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*/ |
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static __be32 |
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nfsd_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 nfsd_readlinkres *resp = rqstp->rq_resp; |
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char *buffer = page_address(*(rqstp->rq_next_page++)); |
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dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh)); |
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/* Read the symlink. */ |
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resp->len = NFS_MAXPATHLEN; |
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resp->status = nfsd_readlink(rqstp, &argp->fh, buffer, &resp->len); |
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fh_put(&argp->fh); |
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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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* N.B. After this call resp->fh needs an fh_put |
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*/ |
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static __be32 |
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nfsd_proc_read(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_readargs *argp = rqstp->rq_argp; |
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struct nfsd_readres *resp = rqstp->rq_resp; |
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unsigned int len; |
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u32 eof; |
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int v; |
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dprintk("nfsd: READ %s %d bytes at %d\n", |
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SVCFH_fmt(&argp->fh), |
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argp->count, argp->offset); |
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argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2); |
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v = 0; |
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len = argp->count; |
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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. 19 is 1 word for |
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* status, 17 words for fattr, and 1 word for the byte count. |
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*/ |
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svc_reserve_auth(rqstp, (19<<2) + argp->count + 4); |
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resp->count = argp->count; |
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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, &eof); |
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if (resp->status == nfs_ok) |
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resp->status = fh_getattr(&resp->fh, &resp->stat); |
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else if (resp->status == nfserr_jukebox) |
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return rpc_drop_reply; |
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return rpc_success; |
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} |
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/* Reserved */ |
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static __be32 |
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nfsd_proc_writecache(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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* Write data to a file |
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* N.B. After this call resp->fh needs an fh_put |
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*/ |
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static __be32 |
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nfsd_proc_write(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_writeargs *argp = rqstp->rq_argp; |
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struct nfsd_attrstat *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 %s %d bytes at %d\n", |
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SVCFH_fmt(&argp->fh), |
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argp->len, argp->offset); |
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nvecs = svc_fill_write_vector(rqstp, rqstp->rq_arg.pages, |
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&argp->first, cnt); |
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if (!nvecs) { |
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resp->status = nfserr_io; |
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goto out; |
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} |
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resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), |
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argp->offset, rqstp->rq_vec, nvecs, |
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&cnt, NFS_DATA_SYNC, NULL); |
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if (resp->status == nfs_ok) |
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resp->status = fh_getattr(&resp->fh, &resp->stat); |
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else if (resp->status == nfserr_jukebox) |
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return rpc_drop_reply; |
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out: |
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return rpc_success; |
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} |
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/* |
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* CREATE processing is complicated. The keyword here is `overloaded.' |
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* The parent directory is kept locked between the check for existence |
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* and the actual create() call in compliance with VFS protocols. |
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* N.B. After this call _both_ argp->fh and resp->fh need an fh_put |
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*/ |
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static __be32 |
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nfsd_proc_create(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_createargs *argp = rqstp->rq_argp; |
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struct nfsd_diropres *resp = rqstp->rq_resp; |
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svc_fh *dirfhp = &argp->fh; |
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svc_fh *newfhp = &resp->fh; |
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struct iattr *attr = &argp->attrs; |
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struct inode *inode; |
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struct dentry *dchild; |
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int type, mode; |
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int hosterr; |
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dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size); |
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dprintk("nfsd: CREATE %s %.*s\n", |
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SVCFH_fmt(dirfhp), argp->len, argp->name); |
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/* First verify the parent file handle */ |
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resp->status = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC); |
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if (resp->status != nfs_ok) |
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goto done; /* must fh_put dirfhp even on error */ |
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/* Check for NFSD_MAY_WRITE in nfsd_create if necessary */ |
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resp->status = nfserr_exist; |
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if (isdotent(argp->name, argp->len)) |
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goto done; |
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hosterr = fh_want_write(dirfhp); |
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if (hosterr) { |
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resp->status = nfserrno(hosterr); |
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goto done; |
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} |
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fh_lock_nested(dirfhp, I_MUTEX_PARENT); |
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dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len); |
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if (IS_ERR(dchild)) { |
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resp->status = nfserrno(PTR_ERR(dchild)); |
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goto out_unlock; |
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} |
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fh_init(newfhp, NFS_FHSIZE); |
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resp->status = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp); |
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if (!resp->status && d_really_is_negative(dchild)) |
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resp->status = nfserr_noent; |
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dput(dchild); |
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if (resp->status) { |
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if (resp->status != nfserr_noent) |
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goto out_unlock; |
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/* |
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* If the new file handle wasn't verified, we can't tell |
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* whether the file exists or not. Time to bail ... |
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*/ |
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resp->status = nfserr_acces; |
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if (!newfhp->fh_dentry) { |
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printk(KERN_WARNING |
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"nfsd_proc_create: file handle not verified\n"); |
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goto out_unlock; |
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} |
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} |
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inode = d_inode(newfhp->fh_dentry); |
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/* Unfudge the mode bits */ |
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if (attr->ia_valid & ATTR_MODE) { |
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type = attr->ia_mode & S_IFMT; |
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mode = attr->ia_mode & ~S_IFMT; |
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if (!type) { |
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/* no type, so if target exists, assume same as that, |
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* else assume a file */ |
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if (inode) { |
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type = inode->i_mode & S_IFMT; |
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switch(type) { |
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case S_IFCHR: |
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case S_IFBLK: |
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/* reserve rdev for later checking */ |
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rdev = inode->i_rdev; |
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attr->ia_valid |= ATTR_SIZE; |
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fallthrough; |
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case S_IFIFO: |
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/* this is probably a permission check.. |
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* at least IRIX implements perm checking on |
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* echo thing > device-special-file-or-pipe |
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* by doing a CREATE with type==0 |
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*/ |
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resp->status = nfsd_permission(rqstp, |
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newfhp->fh_export, |
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newfhp->fh_dentry, |
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NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS); |
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if (resp->status && resp->status != nfserr_rofs) |
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goto out_unlock; |
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} |
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} else |
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type = S_IFREG; |
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} |
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} else if (inode) { |
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type = inode->i_mode & S_IFMT; |
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mode = inode->i_mode & ~S_IFMT; |
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} else { |
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type = S_IFREG; |
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mode = 0; /* ??? */ |
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} |
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attr->ia_valid |= ATTR_MODE; |
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attr->ia_mode = mode; |
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|
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/* Special treatment for non-regular files according to the |
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* gospel of sun micro |
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*/ |
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if (type != S_IFREG) { |
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if (type != S_IFBLK && type != S_IFCHR) { |
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rdev = 0; |
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} else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) { |
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/* If you think you've seen the worst, grok this. */ |
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type = S_IFIFO; |
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} else { |
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/* Okay, char or block special */ |
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if (!rdev) |
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rdev = wanted; |
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} |
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/* we've used the SIZE information, so discard it */ |
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attr->ia_valid &= ~ATTR_SIZE; |
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|
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/* Make sure the type and device matches */ |
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resp->status = nfserr_exist; |
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if (inode && type != (inode->i_mode & S_IFMT)) |
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goto out_unlock; |
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} |
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resp->status = nfs_ok; |
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if (!inode) { |
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/* File doesn't exist. Create it and set attrs */ |
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resp->status = nfsd_create_locked(rqstp, dirfhp, argp->name, |
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argp->len, attr, type, rdev, |
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newfhp); |
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} else if (type == S_IFREG) { |
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dprintk("nfsd: existing %s, valid=%x, size=%ld\n", |
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argp->name, attr->ia_valid, (long) attr->ia_size); |
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/* File already exists. We ignore all attributes except |
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* size, so that creat() behaves exactly like |
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* open(..., O_CREAT|O_TRUNC|O_WRONLY). |
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*/ |
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attr->ia_valid &= ATTR_SIZE; |
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if (attr->ia_valid) |
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resp->status = nfsd_setattr(rqstp, newfhp, attr, 0, |
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(time64_t)0); |
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} |
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out_unlock: |
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/* We don't really need to unlock, as fh_put does it. */ |
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fh_unlock(dirfhp); |
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fh_drop_write(dirfhp); |
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done: |
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fh_put(dirfhp); |
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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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static __be32 |
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nfsd_proc_remove(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_diropargs *argp = rqstp->rq_argp; |
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struct nfsd_stat *resp = rqstp->rq_resp; |
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dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh), |
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argp->len, argp->name); |
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|
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/* Unlink. -SIFDIR means file must not be a directory */ |
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resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR, |
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argp->name, argp->len); |
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fh_put(&argp->fh); |
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return rpc_success; |
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} |
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|
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static __be32 |
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nfsd_proc_rename(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_renameargs *argp = rqstp->rq_argp; |
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struct nfsd_stat *resp = rqstp->rq_resp; |
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dprintk("nfsd: RENAME %s %.*s -> \n", |
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SVCFH_fmt(&argp->ffh), argp->flen, argp->fname); |
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dprintk("nfsd: -> %s %.*s\n", |
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SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname); |
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resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen, |
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&argp->tfh, argp->tname, argp->tlen); |
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fh_put(&argp->ffh); |
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fh_put(&argp->tfh); |
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return rpc_success; |
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} |
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|
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static __be32 |
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nfsd_proc_link(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_linkargs *argp = rqstp->rq_argp; |
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struct nfsd_stat *resp = rqstp->rq_resp; |
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dprintk("nfsd: LINK %s ->\n", |
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SVCFH_fmt(&argp->ffh)); |
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dprintk("nfsd: %s %.*s\n", |
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SVCFH_fmt(&argp->tfh), |
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argp->tlen, |
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argp->tname); |
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|
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resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen, |
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&argp->ffh); |
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fh_put(&argp->ffh); |
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fh_put(&argp->tfh); |
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return rpc_success; |
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} |
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|
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static __be32 |
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nfsd_proc_symlink(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_symlinkargs *argp = rqstp->rq_argp; |
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struct nfsd_stat *resp = rqstp->rq_resp; |
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struct svc_fh newfh; |
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|
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if (argp->tlen > NFS_MAXPATHLEN) { |
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resp->status = nfserr_nametoolong; |
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goto out; |
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} |
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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 %s %.*s -> %.*s\n", |
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SVCFH_fmt(&argp->ffh), argp->flen, argp->fname, |
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argp->tlen, argp->tname); |
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|
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fh_init(&newfh, NFS_FHSIZE); |
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resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen, |
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argp->tname, &newfh); |
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|
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kfree(argp->tname); |
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fh_put(&argp->ffh); |
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fh_put(&newfh); |
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out: |
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return rpc_success; |
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} |
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|
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/* |
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* Make directory. This operation is not idempotent. |
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* N.B. After this call resp->fh needs an fh_put |
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*/ |
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static __be32 |
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nfsd_proc_mkdir(struct svc_rqst *rqstp) |
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{ |
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struct nfsd_createargs *argp = rqstp->rq_argp; |
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struct nfsd_diropres *resp = rqstp->rq_resp; |
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|
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dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); |
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|
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if (resp->fh.fh_dentry) { |
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printk(KERN_WARNING |
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"nfsd_proc_mkdir: response already verified??\n"); |
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} |
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|
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argp->attrs.ia_valid &= ~ATTR_SIZE; |
|
fh_init(&resp->fh, NFS_FHSIZE); |
|
resp->status = nfsd_create(rqstp, &argp->fh, argp->name, argp->len, |
|
&argp->attrs, S_IFDIR, 0, &resp->fh); |
|
fh_put(&argp->fh); |
|
if (resp->status != nfs_ok) |
|
goto out; |
|
|
|
resp->status = fh_getattr(&resp->fh, &resp->stat); |
|
out: |
|
return rpc_success; |
|
} |
|
|
|
/* |
|
* Remove a directory |
|
*/ |
|
static __be32 |
|
nfsd_proc_rmdir(struct svc_rqst *rqstp) |
|
{ |
|
struct nfsd_diropargs *argp = rqstp->rq_argp; |
|
struct nfsd_stat *resp = rqstp->rq_resp; |
|
|
|
dprintk("nfsd: RMDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name); |
|
|
|
resp->status = nfsd_unlink(rqstp, &argp->fh, S_IFDIR, |
|
argp->name, argp->len); |
|
fh_put(&argp->fh); |
|
return rpc_success; |
|
} |
|
|
|
static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp, |
|
struct nfsd_readdirres *resp, |
|
int count) |
|
{ |
|
count = min_t(u32, count, PAGE_SIZE); |
|
|
|
/* Convert byte count to number of words (i.e. >> 2), |
|
* and reserve room for the NULL ptr & eof flag (-2 words) */ |
|
resp->buflen = (count >> 2) - 2; |
|
|
|
resp->buffer = page_address(*rqstp->rq_next_page); |
|
rqstp->rq_next_page++; |
|
} |
|
|
|
/* |
|
* Read a portion of a directory. |
|
*/ |
|
static __be32 |
|
nfsd_proc_readdir(struct svc_rqst *rqstp) |
|
{ |
|
struct nfsd_readdirargs *argp = rqstp->rq_argp; |
|
struct nfsd_readdirres *resp = rqstp->rq_resp; |
|
loff_t offset; |
|
__be32 *buffer; |
|
|
|
dprintk("nfsd: READDIR %s %d bytes at %d\n", |
|
SVCFH_fmt(&argp->fh), |
|
argp->count, argp->cookie); |
|
|
|
nfsd_init_dirlist_pages(rqstp, resp, argp->count); |
|
buffer = resp->buffer; |
|
|
|
resp->offset = NULL; |
|
resp->common.err = nfs_ok; |
|
/* Read directory and encode entries on the fly */ |
|
offset = argp->cookie; |
|
resp->status = nfsd_readdir(rqstp, &argp->fh, &offset, |
|
&resp->common, nfssvc_encode_entry); |
|
|
|
resp->count = resp->buffer - buffer; |
|
if (resp->offset) |
|
*resp->offset = htonl(offset); |
|
|
|
fh_put(&argp->fh); |
|
return rpc_success; |
|
} |
|
|
|
/* |
|
* Get file system info |
|
*/ |
|
static __be32 |
|
nfsd_proc_statfs(struct svc_rqst *rqstp) |
|
{ |
|
struct nfsd_fhandle *argp = rqstp->rq_argp; |
|
struct nfsd_statfsres *resp = rqstp->rq_resp; |
|
|
|
dprintk("nfsd: STATFS %s\n", SVCFH_fmt(&argp->fh)); |
|
|
|
resp->status = nfsd_statfs(rqstp, &argp->fh, &resp->stats, |
|
NFSD_MAY_BYPASS_GSS_ON_ROOT); |
|
fh_put(&argp->fh); |
|
return rpc_success; |
|
} |
|
|
|
/* |
|
* NFSv2 Server procedures. |
|
* Only the results of non-idempotent operations are cached. |
|
*/ |
|
|
|
#define ST 1 /* status */ |
|
#define FH 8 /* filehandle */ |
|
#define AT 18 /* attributes */ |
|
|
|
static const struct svc_procedure nfsd_procedures2[18] = { |
|
[NFSPROC_NULL] = { |
|
.pc_func = nfsd_proc_null, |
|
.pc_decode = nfssvc_decode_voidarg, |
|
.pc_encode = nfssvc_encode_voidres, |
|
.pc_argsize = sizeof(struct nfsd_voidargs), |
|
.pc_ressize = sizeof(struct nfsd_voidres), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_xdrressize = 0, |
|
.pc_name = "NULL", |
|
}, |
|
[NFSPROC_GETATTR] = { |
|
.pc_func = nfsd_proc_getattr, |
|
.pc_decode = nfssvc_decode_fhandleargs, |
|
.pc_encode = nfssvc_encode_attrstat, |
|
.pc_release = nfssvc_release_attrstat, |
|
.pc_argsize = sizeof(struct nfsd_fhandle), |
|
.pc_ressize = sizeof(struct nfsd_attrstat), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_xdrressize = ST+AT, |
|
.pc_name = "GETATTR", |
|
}, |
|
[NFSPROC_SETATTR] = { |
|
.pc_func = nfsd_proc_setattr, |
|
.pc_decode = nfssvc_decode_sattrargs, |
|
.pc_encode = nfssvc_encode_attrstat, |
|
.pc_release = nfssvc_release_attrstat, |
|
.pc_argsize = sizeof(struct nfsd_sattrargs), |
|
.pc_ressize = sizeof(struct nfsd_attrstat), |
|
.pc_cachetype = RC_REPLBUFF, |
|
.pc_xdrressize = ST+AT, |
|
.pc_name = "SETATTR", |
|
}, |
|
[NFSPROC_ROOT] = { |
|
.pc_func = nfsd_proc_root, |
|
.pc_decode = nfssvc_decode_voidarg, |
|
.pc_encode = nfssvc_encode_voidres, |
|
.pc_argsize = sizeof(struct nfsd_voidargs), |
|
.pc_ressize = sizeof(struct nfsd_voidres), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_xdrressize = 0, |
|
.pc_name = "ROOT", |
|
}, |
|
[NFSPROC_LOOKUP] = { |
|
.pc_func = nfsd_proc_lookup, |
|
.pc_decode = nfssvc_decode_diropargs, |
|
.pc_encode = nfssvc_encode_diropres, |
|
.pc_release = nfssvc_release_diropres, |
|
.pc_argsize = sizeof(struct nfsd_diropargs), |
|
.pc_ressize = sizeof(struct nfsd_diropres), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_xdrressize = ST+FH+AT, |
|
.pc_name = "LOOKUP", |
|
}, |
|
[NFSPROC_READLINK] = { |
|
.pc_func = nfsd_proc_readlink, |
|
.pc_decode = nfssvc_decode_fhandleargs, |
|
.pc_encode = nfssvc_encode_readlinkres, |
|
.pc_argsize = sizeof(struct nfsd_fhandle), |
|
.pc_ressize = sizeof(struct nfsd_readlinkres), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_xdrressize = ST+1+NFS_MAXPATHLEN/4, |
|
.pc_name = "READLINK", |
|
}, |
|
[NFSPROC_READ] = { |
|
.pc_func = nfsd_proc_read, |
|
.pc_decode = nfssvc_decode_readargs, |
|
.pc_encode = nfssvc_encode_readres, |
|
.pc_release = nfssvc_release_readres, |
|
.pc_argsize = sizeof(struct nfsd_readargs), |
|
.pc_ressize = sizeof(struct nfsd_readres), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_xdrressize = ST+AT+1+NFSSVC_MAXBLKSIZE_V2/4, |
|
.pc_name = "READ", |
|
}, |
|
[NFSPROC_WRITECACHE] = { |
|
.pc_func = nfsd_proc_writecache, |
|
.pc_decode = nfssvc_decode_voidarg, |
|
.pc_encode = nfssvc_encode_voidres, |
|
.pc_argsize = sizeof(struct nfsd_voidargs), |
|
.pc_ressize = sizeof(struct nfsd_voidres), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_xdrressize = 0, |
|
.pc_name = "WRITECACHE", |
|
}, |
|
[NFSPROC_WRITE] = { |
|
.pc_func = nfsd_proc_write, |
|
.pc_decode = nfssvc_decode_writeargs, |
|
.pc_encode = nfssvc_encode_attrstat, |
|
.pc_release = nfssvc_release_attrstat, |
|
.pc_argsize = sizeof(struct nfsd_writeargs), |
|
.pc_ressize = sizeof(struct nfsd_attrstat), |
|
.pc_cachetype = RC_REPLBUFF, |
|
.pc_xdrressize = ST+AT, |
|
.pc_name = "WRITE", |
|
}, |
|
[NFSPROC_CREATE] = { |
|
.pc_func = nfsd_proc_create, |
|
.pc_decode = nfssvc_decode_createargs, |
|
.pc_encode = nfssvc_encode_diropres, |
|
.pc_release = nfssvc_release_diropres, |
|
.pc_argsize = sizeof(struct nfsd_createargs), |
|
.pc_ressize = sizeof(struct nfsd_diropres), |
|
.pc_cachetype = RC_REPLBUFF, |
|
.pc_xdrressize = ST+FH+AT, |
|
.pc_name = "CREATE", |
|
}, |
|
[NFSPROC_REMOVE] = { |
|
.pc_func = nfsd_proc_remove, |
|
.pc_decode = nfssvc_decode_diropargs, |
|
.pc_encode = nfssvc_encode_stat, |
|
.pc_argsize = sizeof(struct nfsd_diropargs), |
|
.pc_ressize = sizeof(struct nfsd_stat), |
|
.pc_cachetype = RC_REPLSTAT, |
|
.pc_xdrressize = ST, |
|
.pc_name = "REMOVE", |
|
}, |
|
[NFSPROC_RENAME] = { |
|
.pc_func = nfsd_proc_rename, |
|
.pc_decode = nfssvc_decode_renameargs, |
|
.pc_encode = nfssvc_encode_stat, |
|
.pc_argsize = sizeof(struct nfsd_renameargs), |
|
.pc_ressize = sizeof(struct nfsd_stat), |
|
.pc_cachetype = RC_REPLSTAT, |
|
.pc_xdrressize = ST, |
|
.pc_name = "RENAME", |
|
}, |
|
[NFSPROC_LINK] = { |
|
.pc_func = nfsd_proc_link, |
|
.pc_decode = nfssvc_decode_linkargs, |
|
.pc_encode = nfssvc_encode_stat, |
|
.pc_argsize = sizeof(struct nfsd_linkargs), |
|
.pc_ressize = sizeof(struct nfsd_stat), |
|
.pc_cachetype = RC_REPLSTAT, |
|
.pc_xdrressize = ST, |
|
.pc_name = "LINK", |
|
}, |
|
[NFSPROC_SYMLINK] = { |
|
.pc_func = nfsd_proc_symlink, |
|
.pc_decode = nfssvc_decode_symlinkargs, |
|
.pc_encode = nfssvc_encode_stat, |
|
.pc_argsize = sizeof(struct nfsd_symlinkargs), |
|
.pc_ressize = sizeof(struct nfsd_stat), |
|
.pc_cachetype = RC_REPLSTAT, |
|
.pc_xdrressize = ST, |
|
.pc_name = "SYMLINK", |
|
}, |
|
[NFSPROC_MKDIR] = { |
|
.pc_func = nfsd_proc_mkdir, |
|
.pc_decode = nfssvc_decode_createargs, |
|
.pc_encode = nfssvc_encode_diropres, |
|
.pc_release = nfssvc_release_diropres, |
|
.pc_argsize = sizeof(struct nfsd_createargs), |
|
.pc_ressize = sizeof(struct nfsd_diropres), |
|
.pc_cachetype = RC_REPLBUFF, |
|
.pc_xdrressize = ST+FH+AT, |
|
.pc_name = "MKDIR", |
|
}, |
|
[NFSPROC_RMDIR] = { |
|
.pc_func = nfsd_proc_rmdir, |
|
.pc_decode = nfssvc_decode_diropargs, |
|
.pc_encode = nfssvc_encode_stat, |
|
.pc_argsize = sizeof(struct nfsd_diropargs), |
|
.pc_ressize = sizeof(struct nfsd_stat), |
|
.pc_cachetype = RC_REPLSTAT, |
|
.pc_xdrressize = ST, |
|
.pc_name = "RMDIR", |
|
}, |
|
[NFSPROC_READDIR] = { |
|
.pc_func = nfsd_proc_readdir, |
|
.pc_decode = nfssvc_decode_readdirargs, |
|
.pc_encode = nfssvc_encode_readdirres, |
|
.pc_argsize = sizeof(struct nfsd_readdirargs), |
|
.pc_ressize = sizeof(struct nfsd_readdirres), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_name = "READDIR", |
|
}, |
|
[NFSPROC_STATFS] = { |
|
.pc_func = nfsd_proc_statfs, |
|
.pc_decode = nfssvc_decode_fhandleargs, |
|
.pc_encode = nfssvc_encode_statfsres, |
|
.pc_argsize = sizeof(struct nfsd_fhandle), |
|
.pc_ressize = sizeof(struct nfsd_statfsres), |
|
.pc_cachetype = RC_NOCACHE, |
|
.pc_xdrressize = ST+5, |
|
.pc_name = "STATFS", |
|
}, |
|
}; |
|
|
|
|
|
static unsigned int nfsd_count2[ARRAY_SIZE(nfsd_procedures2)]; |
|
const struct svc_version nfsd_version2 = { |
|
.vs_vers = 2, |
|
.vs_nproc = 18, |
|
.vs_proc = nfsd_procedures2, |
|
.vs_count = nfsd_count2, |
|
.vs_dispatch = nfsd_dispatch, |
|
.vs_xdrsize = NFS2_SVC_XDRSIZE, |
|
}; |
|
|
|
/* |
|
* Map errnos to NFS errnos. |
|
*/ |
|
__be32 |
|
nfserrno (int errno) |
|
{ |
|
static struct { |
|
__be32 nfserr; |
|
int syserr; |
|
} nfs_errtbl[] = { |
|
{ nfs_ok, 0 }, |
|
{ nfserr_perm, -EPERM }, |
|
{ nfserr_noent, -ENOENT }, |
|
{ nfserr_io, -EIO }, |
|
{ nfserr_nxio, -ENXIO }, |
|
{ nfserr_fbig, -E2BIG }, |
|
{ nfserr_acces, -EACCES }, |
|
{ nfserr_exist, -EEXIST }, |
|
{ nfserr_xdev, -EXDEV }, |
|
{ nfserr_mlink, -EMLINK }, |
|
{ 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 }, |
|
#ifdef EDQUOT |
|
{ nfserr_dquot, -EDQUOT }, |
|
#endif |
|
{ nfserr_stale, -ESTALE }, |
|
{ nfserr_jukebox, -ETIMEDOUT }, |
|
{ nfserr_jukebox, -ERESTARTSYS }, |
|
{ nfserr_jukebox, -EAGAIN }, |
|
{ nfserr_jukebox, -EWOULDBLOCK }, |
|
{ nfserr_jukebox, -ENOMEM }, |
|
{ nfserr_io, -ETXTBSY }, |
|
{ nfserr_notsupp, -EOPNOTSUPP }, |
|
{ nfserr_toosmall, -ETOOSMALL }, |
|
{ nfserr_serverfault, -ESERVERFAULT }, |
|
{ nfserr_serverfault, -ENFILE }, |
|
{ nfserr_io, -EUCLEAN }, |
|
{ nfserr_perm, -ENOKEY }, |
|
}; |
|
int i; |
|
|
|
for (i = 0; i < ARRAY_SIZE(nfs_errtbl); i++) { |
|
if (nfs_errtbl[i].syserr == errno) |
|
return nfs_errtbl[i].nfserr; |
|
} |
|
WARN_ONCE(1, "nfsd: non-standard errno: %d\n", errno); |
|
return nfserr_io; |
|
} |
|
|
|
|