mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 11:19:37 +00:00
![Chuck Lever](/assets/img/avatar_default.png)
Accrue the following benefits: a) Deduplicate this common bit of code. b) Don't prepare rq_vec for NFSv2 and NFSv3 spliced reads, which don't use rq_vec. This is already the case for nfsd4_encode_read(). c) Eventually, converting NFSD's read path to use a bvec iterator will be simpler. In the next patch, nfsd_iter_read() will replace nfsd_readv() for all NFS versions. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
838 lines
22 KiB
C
838 lines
22 KiB
C
// 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_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:
|
|
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, 0, (time64_t)0);
|
|
if (resp->status != nfs_ok)
|
|
goto out;
|
|
|
|
resp->status = fh_getattr(&resp->fh, &resp->stat);
|
|
out:
|
|
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:
|
|
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);
|
|
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);
|
|
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);
|
|
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,
|
|
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, 0,
|
|
(time64_t)0);
|
|
}
|
|
|
|
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:
|
|
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);
|
|
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);
|
|
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 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:
|
|
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:
|
|
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,
|
|
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);
|
|
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_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,
|
|
};
|