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linux/fs/nfsd/nfsproc.c
NeilBrown 438f81e0e9 nfsd: move error choice for incorrect object types to version-specific code. 
If an NFS operation expects a particular sort of object (file, dir, link,
etc) but gets a file handle for a different sort of object, it must
return an error.  The actual error varies among NFS versions in non-trivial
ways.

For v2 and v3 there are ISDIR and NOTDIR errors and, for NFSv4 only,
INVAL is suitable.

For v4.0 there is also NFS4ERR_SYMLINK which should be used if a SYMLINK
was found when not expected.  This take precedence over NOTDIR.

For v4.1+ there is also NFS4ERR_WRONG_TYPE which should be used in
preference to EINVAL when none of the specific error codes apply.

When nfsd_mode_check() finds a symlink where it expected a directory it
needs to return an error code that can be converted to NOTDIR for v2 or
v3 but will be SYMLINK for v4.  It must be different from the error
code returns when it finds a symlink but expects a regular file - that
must be converted to EINVAL or SYMLINK.

So we introduce an internal error code nfserr_symlink_not_dir which each
version converts as appropriate.

nfsd_check_obj_isreg() is similar to nfsd_mode_check() except that it is
only used by NFSv4 and only for OPEN.  NFSERR_INVAL is never a suitable
error if the object is the wrong time.  For v4.0 we use nfserr_symlink
for non-dirs even if not a symlink.  For v4.1 we have nfserr_wrong_type.
We handle this difference in-place in nfsd_check_obj_isreg() as there is
nothing to be gained by delaying the choice to nfsd4_map_status().

As a result of these changes, nfsd_mode_check() doesn't need an rqstp
arg any more.

Note that NFSv4 operations are actually performed in the xdr code(!!!)
so to the only place that we can map the status code successfully is in
nfsd4_encode_operation().

Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
2024-09-20 19:31:03 -04:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Process version 2 NFS requests.
*
* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
*/
#include <linux/namei.h>
#include "cache.h"
#include "xdr.h"
#include "vfs.h"
#define NFSDDBG_FACILITY NFSDDBG_PROC
static __be32 nfsd_map_status(__be32 status)
{
switch (status) {
case nfs_ok:
break;
case nfserr_nofilehandle:
case nfserr_badhandle:
status = nfserr_stale;
break;
case nfserr_wrongsec:
case nfserr_xdev:
case nfserr_file_open:
status = nfserr_acces;
break;
case nfserr_symlink_not_dir:
status = nfserr_notdir;
break;
case nfserr_symlink:
case nfserr_wrong_type:
status = nfserr_inval;
break;
}
return status;
}
static __be32
nfsd_proc_null(struct svc_rqst *rqstp)
{
return rpc_success;
}
/*
* Get a file's attributes
* N.B. After this call resp->fh needs an fh_put
*/
static __be32
nfsd_proc_getattr(struct svc_rqst *rqstp)
{
struct nfsd_fhandle *argp = rqstp->rq_argp;
struct nfsd_attrstat *resp = rqstp->rq_resp;
dprintk("nfsd: GETATTR %s\n", SVCFH_fmt(&argp->fh));
fh_copy(&resp->fh, &argp->fh);
resp->status = fh_verify(rqstp, &resp->fh, 0,
NFSD_MAY_NOP | NFSD_MAY_BYPASS_GSS_ON_ROOT);
if (resp->status != nfs_ok)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
resp->status = nfsd_map_status(resp->status);
return rpc_success;
}
/*
* Set a file's attributes
* N.B. After this call resp->fh needs an fh_put
*/
static __be32
nfsd_proc_setattr(struct svc_rqst *rqstp)
{
struct nfsd_sattrargs *argp = rqstp->rq_argp;
struct nfsd_attrstat *resp = rqstp->rq_resp;
struct iattr *iap = &argp->attrs;
struct nfsd_attrs attrs = {
.na_iattr = iap,
};
struct svc_fh *fhp;
dprintk("nfsd: SETATTR %s, valid=%x, size=%ld\n",
SVCFH_fmt(&argp->fh),
argp->attrs.ia_valid, (long) argp->attrs.ia_size);
fhp = fh_copy(&resp->fh, &argp->fh);
/*
* NFSv2 does not differentiate between "set-[ac]time-to-now"
* which only requires access, and "set-[ac]time-to-X" which
* requires ownership.
* So if it looks like it might be "set both to the same time which
* is close to now", and if setattr_prepare fails, then we
* convert to "set to now" instead of "set to explicit time"
*
* We only call setattr_prepare as the last test as technically
* it is not an interface that we should be using.
*/
#define BOTH_TIME_SET (ATTR_ATIME_SET | ATTR_MTIME_SET)
#define MAX_TOUCH_TIME_ERROR (30*60)
if ((iap->ia_valid & BOTH_TIME_SET) == BOTH_TIME_SET &&
iap->ia_mtime.tv_sec == iap->ia_atime.tv_sec) {
/*
* Looks probable.
*
* Now just make sure time is in the right ballpark.
* Solaris, at least, doesn't seem to care what the time
* request is. We require it be within 30 minutes of now.
*/
time64_t delta = iap->ia_atime.tv_sec - ktime_get_real_seconds();
resp->status = fh_verify(rqstp, fhp, 0, NFSD_MAY_NOP);
if (resp->status != nfs_ok)
goto out;
if (delta < 0)
delta = -delta;
if (delta < MAX_TOUCH_TIME_ERROR &&
setattr_prepare(&nop_mnt_idmap, fhp->fh_dentry, iap) != 0) {
/*
* Turn off ATTR_[AM]TIME_SET but leave ATTR_[AM]TIME.
* This will cause notify_change to set these times
* to "now"
*/
iap->ia_valid &= ~BOTH_TIME_SET;
}
}
resp->status = nfsd_setattr(rqstp, fhp, &attrs, NULL);
if (resp->status != nfs_ok)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
resp->status = nfsd_map_status(resp->status);
return rpc_success;
}
/* Obsolete, replaced by MNTPROC_MNT. */
static __be32
nfsd_proc_root(struct svc_rqst *rqstp)
{
return rpc_success;
}
/*
* Look up a path name component
* Note: the dentry in the resp->fh may be negative if the file
* doesn't exist yet.
* N.B. After this call resp->fh needs an fh_put
*/
static __be32
nfsd_proc_lookup(struct svc_rqst *rqstp)
{
struct nfsd_diropargs *argp = rqstp->rq_argp;
struct nfsd_diropres *resp = rqstp->rq_resp;
dprintk("nfsd: LOOKUP %s %.*s\n",
SVCFH_fmt(&argp->fh), argp->len, argp->name);
fh_init(&resp->fh, NFS_FHSIZE);
resp->status = nfsd_lookup(rqstp, &argp->fh, argp->name, argp->len,
&resp->fh);
fh_put(&argp->fh);
if (resp->status != nfs_ok)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
resp->status = nfsd_map_status(resp->status);
return rpc_success;
}
/*
* Read a symlink.
*/
static __be32
nfsd_proc_readlink(struct svc_rqst *rqstp)
{
struct nfsd_fhandle *argp = rqstp->rq_argp;
struct nfsd_readlinkres *resp = rqstp->rq_resp;
dprintk("nfsd: READLINK %s\n", SVCFH_fmt(&argp->fh));
/* Read the symlink. */
resp->len = NFS_MAXPATHLEN;
resp->page = *(rqstp->rq_next_page++);
resp->status = nfsd_readlink(rqstp, &argp->fh,
page_address(resp->page), &resp->len);
fh_put(&argp->fh);
resp->status = nfsd_map_status(resp->status);
return rpc_success;
}
/*
* Read a portion of a file.
* N.B. After this call resp->fh needs an fh_put
*/
static __be32
nfsd_proc_read(struct svc_rqst *rqstp)
{
struct nfsd_readargs *argp = rqstp->rq_argp;
struct nfsd_readres *resp = rqstp->rq_resp;
u32 eof;
dprintk("nfsd: READ %s %d bytes at %d\n",
SVCFH_fmt(&argp->fh),
argp->count, argp->offset);
argp->count = min_t(u32, argp->count, NFSSVC_MAXBLKSIZE_V2);
argp->count = min_t(u32, argp->count, rqstp->rq_res.buflen);
resp->pages = rqstp->rq_next_page;
/* Obtain buffer pointer for payload. 19 is 1 word for
* status, 17 words for fattr, and 1 word for the byte count.
*/
svc_reserve_auth(rqstp, (19<<2) + argp->count + 4);
resp->count = argp->count;
fh_copy(&resp->fh, &argp->fh);
resp->status = nfsd_read(rqstp, &resp->fh, argp->offset,
&resp->count, &eof);
if (resp->status == nfs_ok)
resp->status = fh_getattr(&resp->fh, &resp->stat);
else if (resp->status == nfserr_jukebox)
set_bit(RQ_DROPME, &rqstp->rq_flags);
resp->status = nfsd_map_status(resp->status);
return rpc_success;
}
/* Reserved */
static __be32
nfsd_proc_writecache(struct svc_rqst *rqstp)
{
return rpc_success;
}
/*
* Write data to a file
* N.B. After this call resp->fh needs an fh_put
*/
static __be32
nfsd_proc_write(struct svc_rqst *rqstp)
{
struct nfsd_writeargs *argp = rqstp->rq_argp;
struct nfsd_attrstat *resp = rqstp->rq_resp;
unsigned long cnt = argp->len;
unsigned int nvecs;
dprintk("nfsd: WRITE %s %u bytes at %d\n",
SVCFH_fmt(&argp->fh),
argp->len, argp->offset);
nvecs = svc_fill_write_vector(rqstp, &argp->payload);
resp->status = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh),
argp->offset, rqstp->rq_vec, nvecs,
&cnt, NFS_DATA_SYNC, NULL);
if (resp->status == nfs_ok)
resp->status = fh_getattr(&resp->fh, &resp->stat);
else if (resp->status == nfserr_jukebox)
set_bit(RQ_DROPME, &rqstp->rq_flags);
resp->status = nfsd_map_status(resp->status);
return rpc_success;
}
/*
* CREATE processing is complicated. The keyword here is `overloaded.'
* The parent directory is kept locked between the check for existence
* and the actual create() call in compliance with VFS protocols.
* N.B. After this call _both_ argp->fh and resp->fh need an fh_put
*/
static __be32
nfsd_proc_create(struct svc_rqst *rqstp)
{
struct nfsd_createargs *argp = rqstp->rq_argp;
struct nfsd_diropres *resp = rqstp->rq_resp;
svc_fh *dirfhp = &argp->fh;
svc_fh *newfhp = &resp->fh;
struct iattr *attr = &argp->attrs;
struct nfsd_attrs attrs = {
.na_iattr = attr,
};
struct inode *inode;
struct dentry *dchild;
int type, mode;
int hosterr;
dev_t rdev = 0, wanted = new_decode_dev(attr->ia_size);
dprintk("nfsd: CREATE %s %.*s\n",
SVCFH_fmt(dirfhp), argp->len, argp->name);
/* First verify the parent file handle */
resp->status = fh_verify(rqstp, dirfhp, S_IFDIR, NFSD_MAY_EXEC);
if (resp->status != nfs_ok)
goto done; /* must fh_put dirfhp even on error */
/* Check for NFSD_MAY_WRITE in nfsd_create if necessary */
resp->status = nfserr_exist;
if (isdotent(argp->name, argp->len))
goto done;
hosterr = fh_want_write(dirfhp);
if (hosterr) {
resp->status = nfserrno(hosterr);
goto done;
}
inode_lock_nested(dirfhp->fh_dentry->d_inode, I_MUTEX_PARENT);
dchild = lookup_one_len(argp->name, dirfhp->fh_dentry, argp->len);
if (IS_ERR(dchild)) {
resp->status = nfserrno(PTR_ERR(dchild));
goto out_unlock;
}
fh_init(newfhp, NFS_FHSIZE);
resp->status = fh_compose(newfhp, dirfhp->fh_export, dchild, dirfhp);
if (!resp->status && d_really_is_negative(dchild))
resp->status = nfserr_noent;
dput(dchild);
if (resp->status) {
if (resp->status != nfserr_noent)
goto out_unlock;
/*
* If the new file handle wasn't verified, we can't tell
* whether the file exists or not. Time to bail ...
*/
resp->status = nfserr_acces;
if (!newfhp->fh_dentry) {
printk(KERN_WARNING
"nfsd_proc_create: file handle not verified\n");
goto out_unlock;
}
}
inode = d_inode(newfhp->fh_dentry);
/* Unfudge the mode bits */
if (attr->ia_valid & ATTR_MODE) {
type = attr->ia_mode & S_IFMT;
mode = attr->ia_mode & ~S_IFMT;
if (!type) {
/* no type, so if target exists, assume same as that,
* else assume a file */
if (inode) {
type = inode->i_mode & S_IFMT;
switch(type) {
case S_IFCHR:
case S_IFBLK:
/* reserve rdev for later checking */
rdev = inode->i_rdev;
attr->ia_valid |= ATTR_SIZE;
fallthrough;
case S_IFIFO:
/* this is probably a permission check..
* at least IRIX implements perm checking on
* echo thing > device-special-file-or-pipe
* by doing a CREATE with type==0
*/
resp->status = nfsd_permission(
&rqstp->rq_cred,
newfhp->fh_export,
newfhp->fh_dentry,
NFSD_MAY_WRITE|NFSD_MAY_LOCAL_ACCESS);
if (resp->status && resp->status != nfserr_rofs)
goto out_unlock;
}
} else
type = S_IFREG;
}
} else if (inode) {
type = inode->i_mode & S_IFMT;
mode = inode->i_mode & ~S_IFMT;
} else {
type = S_IFREG;
mode = 0; /* ??? */
}
attr->ia_valid |= ATTR_MODE;
attr->ia_mode = mode;
/* Special treatment for non-regular files according to the
* gospel of sun micro
*/
if (type != S_IFREG) {
if (type != S_IFBLK && type != S_IFCHR) {
rdev = 0;
} else if (type == S_IFCHR && !(attr->ia_valid & ATTR_SIZE)) {
/* If you think you've seen the worst, grok this. */
type = S_IFIFO;
} else {
/* Okay, char or block special */
if (!rdev)
rdev = wanted;
}
/* we've used the SIZE information, so discard it */
attr->ia_valid &= ~ATTR_SIZE;
/* Make sure the type and device matches */
resp->status = nfserr_exist;
if (inode && inode_wrong_type(inode, type))
goto out_unlock;
}
resp->status = nfs_ok;
if (!inode) {
/* File doesn't exist. Create it and set attrs */
resp->status = nfsd_create_locked(rqstp, dirfhp, &attrs, type,
rdev, newfhp);
} else if (type == S_IFREG) {
dprintk("nfsd: existing %s, valid=%x, size=%ld\n",
argp->name, attr->ia_valid, (long) attr->ia_size);
/* File already exists. We ignore all attributes except
* size, so that creat() behaves exactly like
* open(..., O_CREAT|O_TRUNC|O_WRONLY).
*/
attr->ia_valid &= ATTR_SIZE;
if (attr->ia_valid)
resp->status = nfsd_setattr(rqstp, newfhp, &attrs,
NULL);
}
out_unlock:
inode_unlock(dirfhp->fh_dentry->d_inode);
fh_drop_write(dirfhp);
done:
fh_put(dirfhp);
if (resp->status != nfs_ok)
goto out;
resp->status = fh_getattr(&resp->fh, &resp->stat);
out:
resp->status = nfsd_map_status(resp->status);
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),
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);
resp->status = nfsd_map_status(resp->status);
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",
SVCFH_fmt(&argp->tfh), argp->tlen, argp->tname);
resp->status = nfsd_rename(rqstp, &argp->ffh, argp->fname, argp->flen,
&argp->tfh, argp->tname, argp->tlen);
fh_put(&argp->ffh);
fh_put(&argp->tfh);
resp->status = nfsd_map_status(resp->status);
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);
resp->status = nfsd_map_status(resp->status);
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 nfsd_attrs attrs = {
.na_iattr = &argp->attrs,
};
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, &attrs, &newfh);
kfree(argp->tname);
fh_put(&argp->ffh);
fh_put(&newfh);
out:
resp->status = nfsd_map_status(resp->status);
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;
struct nfsd_attrs attrs = {
.na_iattr = &argp->attrs,
};
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,
&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:
resp->status = nfsd_map_status(resp->status);
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);
resp->status = nfsd_map_status(resp->status);
return rpc_success;
}
static void nfsd_init_dirlist_pages(struct svc_rqst *rqstp,
struct nfsd_readdirres *resp,
u32 count)
{
struct xdr_buf *buf = &resp->dirlist;
struct xdr_stream *xdr = &resp->xdr;
memset(buf, 0, sizeof(*buf));
/* Reserve room for the NULL ptr & eof flag (-2 words) */
buf->buflen = clamp(count, (u32)(XDR_UNIT * 2), (u32)PAGE_SIZE);
buf->buflen -= XDR_UNIT * 2;
buf->pages = rqstp->rq_next_page;
rqstp->rq_next_page++;
xdr_init_encode_pages(xdr, buf, buf->pages, 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);
resp->status = nfsd_map_status(resp->status);
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);
resp->status = nfsd_map_status(resp->status);
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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = 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_argzero = sizeof(struct nfsd_fhandle),
.pc_ressize = sizeof(struct nfsd_statfsres),
.pc_cachetype = RC_NOCACHE,
.pc_xdrressize = ST+5,
.pc_name = "STATFS",
},
};
static DEFINE_PER_CPU_ALIGNED(unsigned long,
nfsd_count2[ARRAY_SIZE(nfsd_procedures2)]);
const struct svc_version nfsd_version2 = {
.vs_vers = 2,
.vs_nproc = ARRAY_SIZE(nfsd_procedures2),
.vs_proc = nfsd_procedures2,
.vs_count = nfsd_count2,
.vs_dispatch = nfsd_dispatch,
.vs_xdrsize = NFS2_SVC_XDRSIZE,
};
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