Use struct path in struct svc_export

I'm embedding struct path into struct svc_export.

[akpm@linux-foundation.org: coding-style fixes]
[ezk@cs.sunysb.edu: NFSD: fix wrong mnt_writer count in rename]
Signed-off-by: Jan Blunck <jblunck@suse.de>
Acked-by: J. Bruce Fields <bfields@citi.umich.edu>
Acked-by: Christoph Hellwig <hch@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Neil Brown <neilb@suse.de>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/nfsd/export.c

@@ -332,10 +332,9 @@ static void nfsd4_fslocs_free(struct nfsd4_fs_locations *fsloc)
 static void svc_export_put(struct kref *ref)
 {
 	struct svc_export *exp = container_of(ref, struct svc_export, h.ref);
-	dput(exp->ex_dentry);
-	mntput(exp->ex_mnt);
+	path_put(&exp->ex_path);
 	auth_domain_put(exp->ex_client);
-	kfree(exp->ex_path);
+	kfree(exp->ex_pathname);
 	nfsd4_fslocs_free(&exp->ex_fslocs);
 	kfree(exp);
 }
@@ -349,7 +348,7 @@ static void svc_export_request(struct cache_detail *cd,
 	char *pth;
 
 	qword_add(bpp, blen, exp->ex_client->name);
-	pth = d_path(exp->ex_dentry, exp->ex_mnt, *bpp, *blen);
+	pth = d_path(exp->ex_path.dentry, exp->ex_path.mnt, *bpp, *blen);
 	if (IS_ERR(pth)) {
 		/* is this correct? */
 		(*bpp)[0] = '\n';
@@ -508,7 +507,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 	int an_int;
 
 	nd.path.dentry = NULL;
-	exp.ex_path = NULL;
+	exp.ex_pathname = NULL;
 
 	/* fs locations */
 	exp.ex_fslocs.locations = NULL;
@@ -547,11 +546,11 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 
 	exp.h.flags = 0;
 	exp.ex_client = dom;
-	exp.ex_mnt = nd.path.mnt;
-	exp.ex_dentry = nd.path.dentry;
-	exp.ex_path = kstrdup(buf, GFP_KERNEL);
+	exp.ex_path.mnt = nd.path.mnt;
+	exp.ex_path.dentry = nd.path.dentry;
+	exp.ex_pathname = kstrdup(buf, GFP_KERNEL);
 	err = -ENOMEM;
-	if (!exp.ex_path)
+	if (!exp.ex_pathname)
 		goto out;
 
 	/* expiry */
@@ -628,7 +627,7 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
  out:
 	nfsd4_fslocs_free(&exp.ex_fslocs);
 	kfree(exp.ex_uuid);
- 	kfree(exp.ex_path);
+	kfree(exp.ex_pathname);
 	if (nd.path.dentry)
 		path_put(&nd.path);
  out_no_path:
@@ -653,7 +652,7 @@ static int svc_export_show(struct seq_file *m,
 		return 0;
 	}
 	exp = container_of(h, struct svc_export, h);
-	seq_path(m, exp->ex_mnt, exp->ex_dentry, " \t\n\\");
+	seq_path(m, exp->ex_path.mnt, exp->ex_path.dentry, " \t\n\\");
 	seq_putc(m, '\t');
 	seq_escape(m, exp->ex_client->name, " \t\n\\");
 	seq_putc(m, '(');
@@ -680,8 +679,8 @@ static int svc_export_match(struct cache_head *a, struct cache_head *b)
 	struct svc_export *orig = container_of(a, struct svc_export, h);
 	struct svc_export *new = container_of(b, struct svc_export, h);
 	return orig->ex_client == new->ex_client &&
-		orig->ex_dentry == new->ex_dentry &&
-		orig->ex_mnt == new->ex_mnt;
+		orig->ex_path.dentry == new->ex_path.dentry &&
+		orig->ex_path.mnt == new->ex_path.mnt;
 }
 
 static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
@@ -691,9 +690,9 @@ static void svc_export_init(struct cache_head *cnew, struct cache_head *citem)
 
 	kref_get(&item->ex_client->ref);
 	new->ex_client = item->ex_client;
-	new->ex_dentry = dget(item->ex_dentry);
-	new->ex_mnt = mntget(item->ex_mnt);
-	new->ex_path = NULL;
+	new->ex_path.dentry = dget(item->ex_path.dentry);
+	new->ex_path.mnt = mntget(item->ex_path.mnt);
+	new->ex_pathname = NULL;
 	new->ex_fslocs.locations = NULL;
 	new->ex_fslocs.locations_count = 0;
 	new->ex_fslocs.migrated = 0;
@@ -711,8 +710,8 @@ static void export_update(struct cache_head *cnew, struct cache_head *citem)
 	new->ex_fsid = item->ex_fsid;
 	new->ex_uuid = item->ex_uuid;
 	item->ex_uuid = NULL;
-	new->ex_path = item->ex_path;
-	item->ex_path = NULL;
+	new->ex_pathname = item->ex_pathname;
+	item->ex_pathname = NULL;
 	new->ex_fslocs.locations = item->ex_fslocs.locations;
 	item->ex_fslocs.locations = NULL;
 	new->ex_fslocs.locations_count = item->ex_fslocs.locations_count;
@@ -755,8 +754,8 @@ svc_export_lookup(struct svc_export *exp)
 	struct cache_head *ch;
 	int hash;
 	hash = hash_ptr(exp->ex_client, EXPORT_HASHBITS);
-	hash ^= hash_ptr(exp->ex_dentry, EXPORT_HASHBITS);
-	hash ^= hash_ptr(exp->ex_mnt, EXPORT_HASHBITS);
+	hash ^= hash_ptr(exp->ex_path.dentry, EXPORT_HASHBITS);
+	hash ^= hash_ptr(exp->ex_path.mnt, EXPORT_HASHBITS);
 
 	ch = sunrpc_cache_lookup(&svc_export_cache, &exp->h,
 				 hash);
@@ -772,8 +771,8 @@ svc_export_update(struct svc_export *new, struct svc_export *old)
 	struct cache_head *ch;
 	int hash;
 	hash = hash_ptr(old->ex_client, EXPORT_HASHBITS);
-	hash ^= hash_ptr(old->ex_dentry, EXPORT_HASHBITS);
-	hash ^= hash_ptr(old->ex_mnt, EXPORT_HASHBITS);
+	hash ^= hash_ptr(old->ex_path.dentry, EXPORT_HASHBITS);
+	hash ^= hash_ptr(old->ex_path.mnt, EXPORT_HASHBITS);
 
 	ch = sunrpc_cache_update(&svc_export_cache, &new->h,
 				 &old->h,
@@ -815,8 +814,8 @@ static int exp_set_key(svc_client *clp, int fsid_type, u32 *fsidv,
 	key.ek_client = clp;
 	key.ek_fsidtype = fsid_type;
 	memcpy(key.ek_fsid, fsidv, key_len(fsid_type));
-	key.ek_mnt = exp->ex_mnt;
-	key.ek_dentry = exp->ex_dentry;
+	key.ek_mnt = exp->ex_path.mnt;
+	key.ek_dentry = exp->ex_path.dentry;
 	key.h.expiry_time = NEVER;
 	key.h.flags = 0;
 
@@ -870,8 +869,8 @@ static svc_export *exp_get_by_name(svc_client *clp, struct vfsmount *mnt,
 		return ERR_PTR(-ENOENT);
 
 	key.ex_client = clp;
-	key.ex_mnt = mnt;
-	key.ex_dentry = dentry;
+	key.ex_path.mnt = mnt;
+	key.ex_path.dentry = dentry;
 
 	exp = svc_export_lookup(&key);
 	if (exp == NULL)
@@ -968,7 +967,7 @@ static int exp_fsid_hash(svc_client *clp, struct svc_export *exp)
 static int exp_hash(struct auth_domain *clp, struct svc_export *exp)
 {
 	u32 fsid[2];
-	struct inode *inode = exp->ex_dentry->d_inode;
+	struct inode *inode = exp->ex_path.dentry->d_inode;
 	dev_t dev = inode->i_sb->s_dev;
 
 	if (old_valid_dev(dev)) {
@@ -982,7 +981,7 @@ static int exp_hash(struct auth_domain *clp, struct svc_export *exp)
 static void exp_unhash(struct svc_export *exp)
 {
 	struct svc_expkey *ek;
-	struct inode *inode = exp->ex_dentry->d_inode;
+	struct inode *inode = exp->ex_path.dentry->d_inode;
 
 	ek = exp_get_key(exp->ex_client, inode->i_sb->s_dev, inode->i_ino);
 	if (!IS_ERR(ek)) {
@@ -1064,12 +1063,11 @@ exp_export(struct nfsctl_export *nxp)
 
 	new.h.expiry_time = NEVER;
 	new.h.flags = 0;
-	new.ex_path = kstrdup(nxp->ex_path, GFP_KERNEL);
-	if (!new.ex_path)
+	new.ex_pathname = kstrdup(nxp->ex_path, GFP_KERNEL);
+	if (!new.ex_pathname)
 		goto finish;
 	new.ex_client = clp;
-	new.ex_mnt = nd.path.mnt;
-	new.ex_dentry = nd.path.dentry;
+	new.ex_path = nd.path;
 	new.ex_flags = nxp->ex_flags;
 	new.ex_anon_uid = nxp->ex_anon_uid;
 	new.ex_anon_gid = nxp->ex_anon_gid;
@@ -1090,8 +1088,7 @@ exp_export(struct nfsctl_export *nxp)
 	} else
 		err = 0;
 finish:
-	if (new.ex_path)
-		kfree(new.ex_path);
+	kfree(new.ex_pathname);
 	if (exp)
 		exp_put(exp);
 	if (fsid_key && !IS_ERR(fsid_key))
@@ -1360,7 +1357,7 @@ exp_pseudoroot(struct svc_rqst *rqstp, struct svc_fh *fhp)
 	exp = rqst_exp_find(rqstp, FSID_NUM, fsidv);
 	if (IS_ERR(exp))
 		return nfserrno(PTR_ERR(exp));
-	rv = fh_compose(fhp, exp, exp->ex_dentry, NULL);
+	rv = fh_compose(fhp, exp, exp->ex_path.dentry, NULL);
 	if (rv)
 		goto out;
 	rv = check_nfsd_access(exp, rqstp);

fs/nfsd/nfs3proc.c

@@ -67,7 +67,7 @@ nfsd3_proc_getattr(struct svc_rqst *rqstp, struct nfsd_fhandle  *argp,
 	if (nfserr)
 		RETURN_STATUS(nfserr);
 
-	err = vfs_getattr(resp->fh.fh_export->ex_mnt,
+	err = vfs_getattr(resp->fh.fh_export->ex_path.mnt,
 			  resp->fh.fh_dentry, &resp->stat);
 	nfserr = nfserrno(err);
 

fs/nfsd/nfs3xdr.c

@@ -218,7 +218,7 @@ encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
 	        int err;
 		struct kstat stat;
 
-		err = vfs_getattr(fhp->fh_export->ex_mnt, dentry, &stat);
+		err = vfs_getattr(fhp->fh_export->ex_path.mnt, dentry, &stat);
 		if (!err) {
 			*p++ = xdr_one;		/* attributes follow */
 			lease_get_mtime(dentry->d_inode, &stat.mtime);
@@ -270,7 +270,7 @@ void fill_post_wcc(struct svc_fh *fhp)
 	if (fhp->fh_post_saved)
 		printk("nfsd: inode locked twice during operation.\n");
 
-	err = vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry,
+	err = vfs_getattr(fhp->fh_export->ex_path.mnt, fhp->fh_dentry,
 			&fhp->fh_post_attr);
 	if (err)
 		fhp->fh_post_saved = 0;

fs/nfsd/nfs4xdr.c

@@ -1330,9 +1330,9 @@ static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *
 	*stat = exp_pseudoroot(rqstp, &tmp_fh);
 	if (*stat)
 		return NULL;
-	rootpath = tmp_fh.fh_export->ex_path;
+	rootpath = tmp_fh.fh_export->ex_pathname;
 
-	path = exp->ex_path;
+	path = exp->ex_pathname;
 
 	if (strncmp(path, rootpath, strlen(rootpath))) {
 		dprintk("nfsd: fs_locations failed;"
@@ -1481,7 +1481,7 @@ nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp,
 			goto out;
 	}
 
-	err = vfs_getattr(exp->ex_mnt, dentry, &stat);
+	err = vfs_getattr(exp->ex_path.mnt, dentry, &stat);
 	if (err)
 		goto out_nfserr;
 	if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL |
@@ -1838,9 +1838,9 @@ out_acl:
 		 * and this is the root of a cross-mounted filesystem.
 		 */
 		if (ignore_crossmnt == 0 &&
-		    exp->ex_mnt->mnt_root->d_inode == dentry->d_inode) {
-			err = vfs_getattr(exp->ex_mnt->mnt_parent,
-				exp->ex_mnt->mnt_mountpoint, &stat);
+		    exp->ex_path.mnt->mnt_root->d_inode == dentry->d_inode) {
+			err = vfs_getattr(exp->ex_path.mnt->mnt_parent,
+				exp->ex_path.mnt->mnt_mountpoint, &stat);
 			if (err)
 				goto out_nfserr;
 		}

fs/nfsd/nfsfh.c

@@ -47,7 +47,7 @@ static int nfsd_acceptable(void *expv, struct dentry *dentry)
 		return 1;
 
 	tdentry = dget(dentry);
-	while (tdentry != exp->ex_dentry && ! IS_ROOT(tdentry)) {
+	while (tdentry != exp->ex_path.dentry && !IS_ROOT(tdentry)) {
 		/* make sure parents give x permission to user */
 		int err;
 		parent = dget_parent(tdentry);
@@ -59,9 +59,9 @@ static int nfsd_acceptable(void *expv, struct dentry *dentry)
 		dput(tdentry);
 		tdentry = parent;
 	}
-	if (tdentry != exp->ex_dentry)
+	if (tdentry != exp->ex_path.dentry)
 		dprintk("nfsd_acceptable failed at %p %s\n", tdentry, tdentry->d_name.name);
-	rv = (tdentry == exp->ex_dentry);
+	rv = (tdentry == exp->ex_path.dentry);
 	dput(tdentry);
 	return rv;
 }
@@ -209,9 +209,9 @@ fh_verify(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, int access)
 			fileid_type = fh->fh_fileid_type;
 
 		if (fileid_type == FILEID_ROOT)
-			dentry = dget(exp->ex_dentry);
+			dentry = dget(exp->ex_path.dentry);
 		else {
-			dentry = exportfs_decode_fh(exp->ex_mnt, fid,
+			dentry = exportfs_decode_fh(exp->ex_path.mnt, fid,
 					data_left, fileid_type,
 					nfsd_acceptable, exp);
 		}
@@ -299,7 +299,7 @@ out:
 static void _fh_update(struct svc_fh *fhp, struct svc_export *exp,
 		struct dentry *dentry)
 {
-	if (dentry != exp->ex_dentry) {
+	if (dentry != exp->ex_path.dentry) {
 		struct fid *fid = (struct fid *)
 			(fhp->fh_handle.fh_auth + fhp->fh_handle.fh_size/4 - 1);
 		int maxsize = (fhp->fh_maxsize - fhp->fh_handle.fh_size)/4;
@@ -344,12 +344,12 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
 	struct inode * inode = dentry->d_inode;
 	struct dentry *parent = dentry->d_parent;
 	__u32 *datap;
-	dev_t ex_dev = exp->ex_dentry->d_inode->i_sb->s_dev;
-	int root_export = (exp->ex_dentry == exp->ex_dentry->d_sb->s_root);
+	dev_t ex_dev = exp->ex_path.dentry->d_inode->i_sb->s_dev;
+	int root_export = (exp->ex_path.dentry == exp->ex_path.dentry->d_sb->s_root);
 
 	dprintk("nfsd: fh_compose(exp %02x:%02x/%ld %s/%s, ino=%ld)\n",
 		MAJOR(ex_dev), MINOR(ex_dev),
-		(long) exp->ex_dentry->d_inode->i_ino,
+		(long) exp->ex_path.dentry->d_inode->i_ino,
 		parent->d_name.name, dentry->d_name.name,
 		(inode ? inode->i_ino : 0));
 
@@ -391,7 +391,7 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
 			/* FALL THROUGH */
 		case FSID_MAJOR_MINOR:
 		case FSID_ENCODE_DEV:
-			if (!(exp->ex_dentry->d_inode->i_sb->s_type->fs_flags
+			if (!(exp->ex_path.dentry->d_inode->i_sb->s_type->fs_flags
 			      & FS_REQUIRES_DEV))
 				goto retry;
 			break;
@@ -454,7 +454,7 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
 		fhp->fh_handle.ofh_dev =  old_encode_dev(ex_dev);
 		fhp->fh_handle.ofh_xdev = fhp->fh_handle.ofh_dev;
 		fhp->fh_handle.ofh_xino =
-			ino_t_to_u32(exp->ex_dentry->d_inode->i_ino);
+			ino_t_to_u32(exp->ex_path.dentry->d_inode->i_ino);
 		fhp->fh_handle.ofh_dirino = ino_t_to_u32(parent_ino(dentry));
 		if (inode)
 			_fh_update_old(dentry, exp, &fhp->fh_handle);
@@ -465,7 +465,7 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
 		datap = fhp->fh_handle.fh_auth+0;
 		fhp->fh_handle.fh_fsid_type = fsid_type;
 		mk_fsid(fsid_type, datap, ex_dev,
-			exp->ex_dentry->d_inode->i_ino,
+			exp->ex_path.dentry->d_inode->i_ino,
 			exp->ex_fsid, exp->ex_uuid);
 
 		len = key_len(fsid_type);
@@ -571,7 +571,7 @@ enum fsid_source fsid_source(struct svc_fh *fhp)
 	case FSID_DEV:
 	case FSID_ENCODE_DEV:
 	case FSID_MAJOR_MINOR:
-		if (fhp->fh_export->ex_dentry->d_inode->i_sb->s_type->fs_flags
+		if (fhp->fh_export->ex_path.dentry->d_inode->i_sb->s_type->fs_flags
 		    & FS_REQUIRES_DEV)
 			return FSIDSOURCE_DEV;
 		break;

fs/nfsd/nfsproc.c

@@ -41,7 +41,7 @@ static __be32
 nfsd_return_attrs(__be32 err, struct nfsd_attrstat *resp)
 {
 	if (err) return err;
-	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
+	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
 				    resp->fh.fh_dentry,
 				    &resp->stat));
 }
@@ -49,7 +49,7 @@ static __be32
 nfsd_return_dirop(__be32 err, struct nfsd_diropres *resp)
 {
 	if (err) return err;
-	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
+	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
 				    resp->fh.fh_dentry,
 				    &resp->stat));
 }
@@ -164,7 +164,7 @@ nfsd_proc_read(struct svc_rqst *rqstp, struct nfsd_readargs *argp,
 				  &resp->count);
 
 	if (nfserr) return nfserr;
-	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_mnt,
+	return nfserrno(vfs_getattr(resp->fh.fh_export->ex_path.mnt,
 				    resp->fh.fh_dentry,
 				    &resp->stat));
 }

fs/nfsd/nfsxdr.c

@@ -207,7 +207,7 @@ encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
 __be32 *nfs2svc_encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
 {
 	struct kstat stat;
-	vfs_getattr(fhp->fh_export->ex_mnt, fhp->fh_dentry, &stat);
+	vfs_getattr(fhp->fh_export->ex_path.mnt, fhp->fh_dentry, &stat);
 	return encode_fattr(rqstp, p, fhp, &stat);
 }
 

fs/nfsd/vfs.c

@@ -101,7 +101,7 @@ nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
 {
 	struct svc_export *exp = *expp, *exp2 = NULL;
 	struct dentry *dentry = *dpp;
-	struct vfsmount *mnt = mntget(exp->ex_mnt);
+	struct vfsmount *mnt = mntget(exp->ex_path.mnt);
 	struct dentry *mounts = dget(dentry);
 	int err = 0;
 
@@ -156,15 +156,15 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	if (isdotent(name, len)) {
 		if (len==1)
 			dentry = dget(dparent);
-		else if (dparent != exp->ex_dentry) {
+		else if (dparent != exp->ex_path.dentry)
 			dentry = dget_parent(dparent);
-		} else  if (!EX_NOHIDE(exp))
+		else if (!EX_NOHIDE(exp))
 			dentry = dget(dparent); /* .. == . just like at / */
 		else {
 			/* checking mountpoint crossing is very different when stepping up */
 			struct svc_export *exp2 = NULL;
 			struct dentry *dp;
-			struct vfsmount *mnt = mntget(exp->ex_mnt);
+			struct vfsmount *mnt = mntget(exp->ex_path.mnt);
 			dentry = dget(dparent);
 			while(dentry == mnt->mnt_root && follow_up(&mnt, &dentry))
 				;
@@ -721,7 +721,8 @@ nfsd_open(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
 
 		DQUOT_INIT(inode);
 	}
-	*filp = dentry_open(dget(dentry), mntget(fhp->fh_export->ex_mnt), flags);
+	*filp = dentry_open(dget(dentry), mntget(fhp->fh_export->ex_path.mnt),
+				flags);
 	if (IS_ERR(*filp))
 		host_err = PTR_ERR(*filp);
 out_nfserr:
@@ -1462,7 +1463,7 @@ nfsd_readlink(struct svc_rqst *rqstp, struct svc_fh *fhp, char *buf, int *lenp)
 	if (!inode->i_op || !inode->i_op->readlink)
 		goto out;
 
-	touch_atime(fhp->fh_export->ex_mnt, dentry);
+	touch_atime(fhp->fh_export->ex_path.mnt, dentry);
 	/* N.B. Why does this call need a get_fs()??
 	 * Remove the set_fs and watch the fireworks:-) --okir
 	 */

include/linux/nfsd/export.h

@@ -84,9 +84,8 @@ struct svc_export {
 	struct cache_head	h;
 	struct auth_domain *	ex_client;
 	int			ex_flags;
-	struct vfsmount *	ex_mnt;
-	struct dentry *		ex_dentry;
-	char *			ex_path;
+	struct path		ex_path;
+	char			*ex_pathname;
 	uid_t			ex_anon_uid;
 	gid_t			ex_anon_gid;
 	int			ex_fsid;