Release 4.13 fs/nfsd/nfs3acl.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)
{
	return nfs_ok;
}

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Andreas Gruenbacher
13
92.86%
1
50.00%
Al Viro
1
7.14%
1
50.00%
Total
14
100.00%
2
100.00%

/*
 * Get the Access and/or Default ACL of a file.
 */


static __be32 nfsd3_proc_getacl(struct svc_rqst *rqstp)
{
	struct nfsd3_getaclargs *argp = rqstp->rq_argp;
	struct nfsd3_getaclres *resp = rqstp->rq_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);
}

Contributors
Person
Tokens
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Commits
CommitProp
Andreas Gruenbacher
198
73.61%
1
10.00%
Christoph Hellwig
39
14.50%
2
20.00%
Kinglong Mee
21
7.81%
2
20.00%
Miklos Szeredi
5
1.86%
1
10.00%
David Howells
3
1.12%
1
10.00%
Al Viro
2
0.74%
2
20.00%
J. Bruce Fields
1
0.37%
1
10.00%
Total
269
100.00%
10
100.00%

/*
 * Set the Access and/or Default ACL of a file.
 */


static __be32 nfsd3_proc_setacl(struct svc_rqst *rqstp)
{
	struct nfsd3_setaclargs *argp = rqstp->rq_argp;
	struct nfsd3_attrstat *resp = rqstp->rq_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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Gruenbacher
99
52.66%
1
12.50%
Christoph Hellwig
65
34.57%
2
25.00%
Ben Hutchings
18
9.57%
1
12.50%
David Howells
3
1.60%
1
12.50%
Al Viro
2
1.06%
2
25.00%
Miklos Szeredi
1
0.53%
1
12.50%
Total
188
100.00%
8
100.00%

/*
 * XDR decode functions
 */


static int nfs3svc_decode_getaclargs(struct svc_rqst *rqstp, __be32 *p)
{
	struct nfsd3_getaclargs *args = rqstp->rq_argp;

	p = nfs3svc_decode_fh(p, &args->fh);
	if (!p)
		return 0;
	args->mask = ntohl(*p); p++;

	return xdr_argsize_check(rqstp, p);
}


Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Gruenbacher
52
80.00%
1
25.00%
Christoph Hellwig
7
10.77%
1
25.00%
Benoit Taine
5
7.69%
1
25.00%
Al Viro
1
1.54%
1
25.00%
Total
65
100.00%
4
100.00%



static int nfs3svc_decode_setaclargs(struct svc_rqst *rqstp, __be32 *p)
{
	struct nfsd3_setaclargs *args = rqstp->rq_argp;
	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);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Gruenbacher
168
92.31%
1
20.00%
Christoph Hellwig
7
3.85%
1
20.00%
Benoit Taine
5
2.75%
1
20.00%
Kinglong Mee
1
0.55%
1
20.00%
Al Viro
1
0.55%
1
20.00%
Total
182
100.00%
5
100.00%

/*
 * XDR encode functions
 */

/* GETACL */


static int nfs3svc_encode_getaclres(struct svc_rqst *rqstp, __be32 *p)
{
	struct nfsd3_getaclres *resp = rqstp->rq_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;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Andreas Gruenbacher
234
81.25%
1
14.29%
Jesper Juhl
34
11.81%
1
14.29%
Christoph Hellwig
7
2.43%
1
14.29%
David Howells
6
2.08%
1
14.29%
J. Bruce Fields
4
1.39%
1
14.29%
Neil Brown
2
0.69%
1
14.29%
Al Viro
1
0.35%
1
14.29%
Total
288
100.00%
7
100.00%

/* SETACL */


static int nfs3svc_encode_setaclres(struct svc_rqst *rqstp, __be32 *p)
{
	struct nfsd3_attrstat *resp = rqstp->rq_resp;

	p = nfs3svc_encode_post_op_attr(rqstp, p, &resp->fh);

	return xdr_ressize_check(rqstp, p);
}

Contributors
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Tokens
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Commits
CommitProp
Andreas Gruenbacher
38
82.61%
1
33.33%
Christoph Hellwig
7
15.22%
1
33.33%
Al Viro
1
2.17%
1
33.33%
Total
46
100.00%
3
100.00%

/*
 * XDR release functions
 */


static void nfs3svc_release_getacl(struct svc_rqst *rqstp)
{
	struct nfsd3_getaclres *resp = rqstp->rq_resp;

	fh_put(&resp->fh);
	posix_acl_release(resp->acl_access);
	posix_acl_release(resp->acl_default);
}

Contributors
Person
Tokens
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CommitProp
Andreas Gruenbacher
34
80.95%
1
50.00%
Christoph Hellwig
8
19.05%
1
50.00%
Total
42
100.00%
2
100.00%


#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)			\
{                                                                       \
        .pc_func        = nfsd3_proc_##name,                            \
        .pc_decode      = nfs3svc_decode_##argt##args,                  \
        .pc_encode      = nfs3svc_encode_##rest##res,                   \
        .pc_release     = nfs3svc_release_##relt,                       \
        .pc_argsize     = sizeof(struct nfsd3_##argt##args),            \
        .pc_ressize     = sizeof(struct nfsd3_##rest##res),             \
        .pc_cachetype   = cache,                                        \
        .pc_xdrressize  = 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 const 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),
};


static unsigned int nfsd_acl_count3[ARRAY_SIZE(nfsd_acl_procedures3)];

const struct svc_version nfsd_acl_version3 = {
	.vs_vers	= 3,
	.vs_nproc	= 3,
	.vs_proc	= nfsd_acl_procedures3,
	.vs_count	= nfsd_acl_count3,
	.vs_dispatch	= nfsd_dispatch,
	.vs_xdrsize	= NFS3_SVC_XDRSIZE,
};

Overall Contributors
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CommitProp
Andreas Gruenbacher
1016
77.85%
1
3.85%
Christoph Hellwig
159
12.18%
8
30.77%
Jesper Juhl
34
2.61%
1
3.85%
Kinglong Mee
22
1.69%
2
7.69%
Ben Hutchings
18
1.38%
1
3.85%
David Howells
12
0.92%
1
3.85%
Benoit Taine
10
0.77%
1
3.85%
J. Bruce Fields
9
0.69%
4
15.38%
Al Viro
9
0.69%
3
11.54%
Miklos Szeredi
6
0.46%
1
3.85%
Boaz Harrosh
5
0.38%
1
3.85%
Tejun Heo
3
0.23%
1
3.85%
Neil Brown
2
0.15%
1
3.85%
Total
1305
100.00%
26
100.00%
Directory: fs/nfsd

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