mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 01:54:09 +08:00
05a45a2db4
It's just simpler to read this way, IMO. Also, no need to explicitly set vs_hidden to false in the nfsacl ones. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
271 lines
6.3 KiB
C
271 lines
6.3 KiB
C
/*
|
|
* Process version 3 NFSACL requests.
|
|
*
|
|
* Copyright (C) 2002-2003 Andreas Gruenbacher <agruen@suse.de>
|
|
*/
|
|
|
|
#include "nfsd.h"
|
|
/* FIXME: nfsacl.h is a broken header */
|
|
#include <linux/nfsacl.h>
|
|
#include <linux/gfp.h>
|
|
#include "cache.h"
|
|
#include "xdr3.h"
|
|
#include "vfs.h"
|
|
|
|
#define RETURN_STATUS(st) { resp->status = (st); return (st); }
|
|
|
|
/*
|
|
* NULL call.
|
|
*/
|
|
static __be32
|
|
nfsd3_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
|
|
{
|
|
return nfs_ok;
|
|
}
|
|
|
|
/*
|
|
* Get the Access and/or Default ACL of a file.
|
|
*/
|
|
static __be32 nfsd3_proc_getacl(struct svc_rqst * rqstp,
|
|
struct nfsd3_getaclargs *argp, struct nfsd3_getaclres *resp)
|
|
{
|
|
struct posix_acl *acl;
|
|
struct inode *inode;
|
|
svc_fh *fh;
|
|
__be32 nfserr = 0;
|
|
|
|
fh = fh_copy(&resp->fh, &argp->fh);
|
|
nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_NOP);
|
|
if (nfserr)
|
|
RETURN_STATUS(nfserr);
|
|
|
|
inode = d_inode(fh->fh_dentry);
|
|
|
|
if (argp->mask & ~NFS_ACL_MASK)
|
|
RETURN_STATUS(nfserr_inval);
|
|
resp->mask = argp->mask;
|
|
|
|
if (resp->mask & (NFS_ACL|NFS_ACLCNT)) {
|
|
acl = get_acl(inode, ACL_TYPE_ACCESS);
|
|
if (acl == NULL) {
|
|
/* Solaris returns the inode's minimum ACL. */
|
|
acl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
|
|
}
|
|
if (IS_ERR(acl)) {
|
|
nfserr = nfserrno(PTR_ERR(acl));
|
|
goto fail;
|
|
}
|
|
resp->acl_access = acl;
|
|
}
|
|
if (resp->mask & (NFS_DFACL|NFS_DFACLCNT)) {
|
|
/* Check how Solaris handles requests for the Default ACL
|
|
of a non-directory! */
|
|
acl = get_acl(inode, ACL_TYPE_DEFAULT);
|
|
if (IS_ERR(acl)) {
|
|
nfserr = nfserrno(PTR_ERR(acl));
|
|
goto fail;
|
|
}
|
|
resp->acl_default = acl;
|
|
}
|
|
|
|
/* resp->acl_{access,default} are released in nfs3svc_release_getacl. */
|
|
RETURN_STATUS(0);
|
|
|
|
fail:
|
|
posix_acl_release(resp->acl_access);
|
|
posix_acl_release(resp->acl_default);
|
|
RETURN_STATUS(nfserr);
|
|
}
|
|
|
|
/*
|
|
* Set the Access and/or Default ACL of a file.
|
|
*/
|
|
static __be32 nfsd3_proc_setacl(struct svc_rqst * rqstp,
|
|
struct nfsd3_setaclargs *argp,
|
|
struct nfsd3_attrstat *resp)
|
|
{
|
|
struct inode *inode;
|
|
svc_fh *fh;
|
|
__be32 nfserr = 0;
|
|
int error;
|
|
|
|
fh = fh_copy(&resp->fh, &argp->fh);
|
|
nfserr = fh_verify(rqstp, &resp->fh, 0, NFSD_MAY_SATTR);
|
|
if (nfserr)
|
|
goto out;
|
|
|
|
inode = d_inode(fh->fh_dentry);
|
|
|
|
error = fh_want_write(fh);
|
|
if (error)
|
|
goto out_errno;
|
|
|
|
fh_lock(fh);
|
|
|
|
error = set_posix_acl(inode, ACL_TYPE_ACCESS, argp->acl_access);
|
|
if (error)
|
|
goto out_drop_lock;
|
|
error = set_posix_acl(inode, ACL_TYPE_DEFAULT, argp->acl_default);
|
|
|
|
out_drop_lock:
|
|
fh_unlock(fh);
|
|
fh_drop_write(fh);
|
|
out_errno:
|
|
nfserr = nfserrno(error);
|
|
out:
|
|
/* argp->acl_{access,default} may have been allocated in
|
|
nfs3svc_decode_setaclargs. */
|
|
posix_acl_release(argp->acl_access);
|
|
posix_acl_release(argp->acl_default);
|
|
RETURN_STATUS(nfserr);
|
|
}
|
|
|
|
/*
|
|
* XDR decode functions
|
|
*/
|
|
static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_getaclargs *args)
|
|
{
|
|
p = nfs3svc_decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
args->mask = ntohl(*p); p++;
|
|
|
|
return xdr_argsize_check(rqstp, p);
|
|
}
|
|
|
|
|
|
static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_setaclargs *args)
|
|
{
|
|
struct kvec *head = rqstp->rq_arg.head;
|
|
unsigned int base;
|
|
int n;
|
|
|
|
p = nfs3svc_decode_fh(p, &args->fh);
|
|
if (!p)
|
|
return 0;
|
|
args->mask = ntohl(*p++);
|
|
if (args->mask & ~NFS_ACL_MASK ||
|
|
!xdr_argsize_check(rqstp, p))
|
|
return 0;
|
|
|
|
base = (char *)p - (char *)head->iov_base;
|
|
n = nfsacl_decode(&rqstp->rq_arg, base, NULL,
|
|
(args->mask & NFS_ACL) ?
|
|
&args->acl_access : NULL);
|
|
if (n > 0)
|
|
n = nfsacl_decode(&rqstp->rq_arg, base + n, NULL,
|
|
(args->mask & NFS_DFACL) ?
|
|
&args->acl_default : NULL);
|
|
return (n > 0);
|
|
}
|
|
|
|
/*
|
|
* XDR encode functions
|
|
*/
|
|
|
|
/* GETACL */
|
|
static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_getaclres *resp)
|
|
{
|
|
struct dentry *dentry = resp->fh.fh_dentry;
|
|
|
|
p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
|
|
if (resp->status == 0 && dentry && d_really_is_positive(dentry)) {
|
|
struct inode *inode = d_inode(dentry);
|
|
struct kvec *head = rqstp->rq_res.head;
|
|
unsigned int base;
|
|
int n;
|
|
int w;
|
|
|
|
*p++ = htonl(resp->mask);
|
|
if (!xdr_ressize_check(rqstp, p))
|
|
return 0;
|
|
base = (char *)p - (char *)head->iov_base;
|
|
|
|
rqstp->rq_res.page_len = w = nfsacl_size(
|
|
(resp->mask & NFS_ACL) ? resp->acl_access : NULL,
|
|
(resp->mask & NFS_DFACL) ? resp->acl_default : NULL);
|
|
while (w > 0) {
|
|
if (!*(rqstp->rq_next_page++))
|
|
return 0;
|
|
w -= PAGE_SIZE;
|
|
}
|
|
|
|
n = nfsacl_encode(&rqstp->rq_res, base, inode,
|
|
resp->acl_access,
|
|
resp->mask & NFS_ACL, 0);
|
|
if (n > 0)
|
|
n = nfsacl_encode(&rqstp->rq_res, base + n, inode,
|
|
resp->acl_default,
|
|
resp->mask & NFS_DFACL,
|
|
NFS_ACL_DEFAULT);
|
|
if (n <= 0)
|
|
return 0;
|
|
} else
|
|
if (!xdr_ressize_check(rqstp, p))
|
|
return 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* SETACL */
|
|
static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_attrstat *resp)
|
|
{
|
|
p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);
|
|
|
|
return xdr_ressize_check(rqstp, p);
|
|
}
|
|
|
|
/*
|
|
* XDR release functions
|
|
*/
|
|
static int nfs3svc_release_getacl(struct svc_rqst *rqstp, __be32 *p,
|
|
struct nfsd3_getaclres *resp)
|
|
{
|
|
fh_put(&resp->fh);
|
|
posix_acl_release(resp->acl_access);
|
|
posix_acl_release(resp->acl_default);
|
|
return 1;
|
|
}
|
|
|
|
#define nfs3svc_decode_voidargs NULL
|
|
#define nfs3svc_release_void NULL
|
|
#define nfsd3_setaclres nfsd3_attrstat
|
|
#define nfsd3_voidres nfsd3_voidargs
|
|
struct nfsd3_voidargs { int dummy; };
|
|
|
|
#define PROC(name, argt, rest, relt, cache, respsize) \
|
|
{ (svc_procfunc) nfsd3_proc_##name, \
|
|
(kxdrproc_t) nfs3svc_decode_##argt##args, \
|
|
(kxdrproc_t) nfs3svc_encode_##rest##res, \
|
|
(kxdrproc_t) nfs3svc_release_##relt, \
|
|
sizeof(struct nfsd3_##argt##args), \
|
|
sizeof(struct nfsd3_##rest##res), \
|
|
0, \
|
|
cache, \
|
|
respsize, \
|
|
}
|
|
|
|
#define ST 1 /* status*/
|
|
#define AT 21 /* attributes */
|
|
#define pAT (1+AT) /* post attributes - conditional */
|
|
#define ACL (1+NFS_ACL_MAX_ENTRIES*3) /* Access Control List */
|
|
|
|
static struct svc_procedure nfsd_acl_procedures3[] = {
|
|
PROC(null, void, void, void, RC_NOCACHE, ST),
|
|
PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)),
|
|
PROC(setacl, setacl, setacl, fhandle, RC_NOCACHE, ST+pAT),
|
|
};
|
|
|
|
struct svc_version nfsd_acl_version3 = {
|
|
.vs_vers = 3,
|
|
.vs_nproc = 3,
|
|
.vs_proc = nfsd_acl_procedures3,
|
|
.vs_dispatch = nfsd_dispatch,
|
|
.vs_xdrsize = NFS3_SVC_XDRSIZE,
|
|
};
|
|
|