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https://mirrors.bfsu.edu.cn/git/linux.git
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d1466bc583
Pull vfs inode type handling updates from Al Viro: "We should never change the type bits of ->i_mode or the method tables (->i_op and ->i_fop) of a live inode. Unfortunately, not all filesystems took care to prevent that" * 'work.inode-type-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: spufs: fix bogosity in S_ISGID handling 9p: missing chunk of "fs/9p: Don't update file type when updating file attributes" openpromfs: don't do unlock_new_inode() until the new inode is set up hostfs_mknod(): don't bother with init_special_inode() cifs: have cifs_fattr_to_inode() refuse to change type on live inode cifs: have ->mkdir() handle race with another client sanely do_cifs_create(): don't set ->i_mode of something we had not created gfs2: be careful with inode refresh ocfs2_inode_lock_update(): make sure we don't change the type bits of i_mode orangefs_inode_is_stale(): i_mode type bits do *not* form a bitmap... vboxsf: don't allow to change the inode type afs: Fix updating of i_mode due to 3rd party change ceph: don't allow type or device number to change on non-I_NEW inodes ceph: fix up error handling with snapdirs new helper: inode_wrong_type()
895 lines
23 KiB
C
895 lines
23 KiB
C
// 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 <okir@monad.swb.de>
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*/
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#include <linux/namei.h>
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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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#define NFSDDBG_FACILITY NFSDDBG_PROC
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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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* 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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* 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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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->page = *(rqstp->rq_next_page++);
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resp->status = nfsd_readlink(rqstp, &argp->fh,
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page_address(resp->page), &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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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. 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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|
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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 && inode_wrong_type(inode, type))
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goto out_unlock;
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}
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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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}
|
|
|
|
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);
|
|
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);
|
|
out:
|
|
return rpc_success;
|
|
}
|
|
|
|
static __be32
|
|
nfsd_proc_remove(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd_diropargs *argp = rqstp->rq_argp;
|
|
struct nfsd_stat *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: REMOVE %s %.*s\n", SVCFH_fmt(&argp->fh),
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argp->len, argp->name);
|
|
|
|
/* Unlink. -SIFDIR means file must not be a directory */
|
|
resp->status = nfsd_unlink(rqstp, &argp->fh, -S_IFDIR,
|
|
argp->name, argp->len);
|
|
fh_put(&argp->fh);
|
|
return rpc_success;
|
|
}
|
|
|
|
static __be32
|
|
nfsd_proc_rename(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd_renameargs *argp = rqstp->rq_argp;
|
|
struct nfsd_stat *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: RENAME %s %.*s -> \n",
|
|
SVCFH_fmt(&argp->ffh), argp->flen, argp->fname);
|
|
dprintk("nfsd: -> %s %.*s\n",
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SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
|
|
|
|
resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
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&argp->tfh, argp->tname, argp->tlen);
|
|
fh_put(&argp->ffh);
|
|
fh_put(&argp->tfh);
|
|
return rpc_success;
|
|
}
|
|
|
|
static __be32
|
|
nfsd_proc_link(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd_linkargs *argp = rqstp->rq_argp;
|
|
struct nfsd_stat *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: LINK %s ->\n",
|
|
SVCFH_fmt(&argp->ffh));
|
|
dprintk("nfsd: %s %.*s\n",
|
|
SVCFH_fmt(&argp->tfh),
|
|
argp->tlen,
|
|
argp->tname);
|
|
|
|
resp->status = nfsd_link(rqstp, &argp->tfh, argp->tname, argp->tlen,
|
|
&argp->ffh);
|
|
fh_put(&argp->ffh);
|
|
fh_put(&argp->tfh);
|
|
return rpc_success;
|
|
}
|
|
|
|
static __be32
|
|
nfsd_proc_symlink(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd_symlinkargs *argp = rqstp->rq_argp;
|
|
struct nfsd_stat *resp = rqstp->rq_resp;
|
|
struct svc_fh newfh;
|
|
|
|
if (argp->tlen > NFS_MAXPATHLEN) {
|
|
resp->status = nfserr_nametoolong;
|
|
goto out;
|
|
}
|
|
|
|
argp->tname = svc_fill_symlink_pathname(rqstp, &argp->first,
|
|
page_address(rqstp->rq_arg.pages[0]),
|
|
argp->tlen);
|
|
if (IS_ERR(argp->tname)) {
|
|
resp->status = nfserrno(PTR_ERR(argp->tname));
|
|
goto out;
|
|
}
|
|
|
|
dprintk("nfsd: SYMLINK %s %.*s -> %.*s\n",
|
|
SVCFH_fmt(&argp->ffh), argp->flen, argp->fname,
|
|
argp->tlen, argp->tname);
|
|
|
|
fh_init(&newfh, NFS_FHSIZE);
|
|
resp->status = nfsd_symlink(rqstp, &argp->ffh, argp->fname, argp->flen,
|
|
argp->tname, &newfh);
|
|
|
|
kfree(argp->tname);
|
|
fh_put(&argp->ffh);
|
|
fh_put(&newfh);
|
|
out:
|
|
return rpc_success;
|
|
}
|
|
|
|
/*
|
|
* Make directory. This operation is not idempotent.
|
|
* N.B. After this call resp->fh needs an fh_put
|
|
*/
|
|
static __be32
|
|
nfsd_proc_mkdir(struct svc_rqst *rqstp)
|
|
{
|
|
struct nfsd_createargs *argp = rqstp->rq_argp;
|
|
struct nfsd_diropres *resp = rqstp->rq_resp;
|
|
|
|
dprintk("nfsd: MKDIR %s %.*s\n", SVCFH_fmt(&argp->fh), argp->len, argp->name);
|
|
|
|
if (resp->fh.fh_dentry) {
|
|
printk(KERN_WARNING
|
|
"nfsd_proc_mkdir: response already verified??\n");
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct xdr_buf *buf = &resp->dirlist;
|
|
struct xdr_stream *xdr = &resp->xdr;
|
|
|
|
count = min_t(u32, count, PAGE_SIZE);
|
|
|
|
memset(buf, 0, sizeof(*buf));
|
|
|
|
/* Reserve room for the NULL ptr & eof flag (-2 words) */
|
|
buf->buflen = count - sizeof(__be32) * 2;
|
|
buf->pages = rqstp->rq_next_page;
|
|
rqstp->rq_next_page++;
|
|
|
|
/* 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 = xdr->p + (PAGE_SIZE >> 2);
|
|
xdr->rqst = NULL;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
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);
|
|
|
|
resp->common.err = nfs_ok;
|
|
resp->cookie_offset = 0;
|
|
offset = argp->cookie;
|
|
resp->status = nfsd_readdir(rqstp, &argp->fh, &offset,
|
|
&resp->common, nfssvc_encode_entry);
|
|
nfssvc_encode_nfscookie(resp, 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_attrstatres,
|
|
.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_attrstatres,
|
|
.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_attrstatres,
|
|
.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_statres,
|
|
.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_statres,
|
|
.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_statres,
|
|
.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_statres,
|
|
.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_statres,
|
|
.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;
|
|
}
|
|
|