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Commit e64c390c authored by Al Viro's avatar Al Viro
Browse files

switch rqst_exp_parent() 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 91c9fa8f

fs/nfsd/export.c

+10 −15
Original line number Diff line number Diff line
@@ -1299,24 +1299,19 @@ rqst_exp_find(struct svc_rqst *rqstp, int fsid_type, u32 *fsidv) 
}



struct svc_export *

rqst_exp_parent(struct svc_rqst *rqstp, struct vfsmount *mnt,

		struct dentry *dentry)

rqst_exp_parent(struct svc_rqst *rqstp, struct path *path)

{

	struct svc_export *exp;

	struct path path = {.mnt = mnt, .dentry = dentry};



	dget(dentry);

	exp = rqst_exp_get_by_name(rqstp, &path);



	while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(dentry)) {

		struct dentry *parent;

	struct dentry *saved = dget(path->dentry);

	struct svc_export *exp = rqst_exp_get_by_name(rqstp, path);



		parent = dget_parent(dentry);

		dput(dentry);

		dentry = parent;

		exp = rqst_exp_get_by_name(rqstp, &path);

	while (PTR_ERR(exp) == -ENOENT && !IS_ROOT(path->dentry)) {

		struct dentry *parent = dget_parent(path->dentry);

		dput(path->dentry);

		path->dentry = parent;

		exp = rqst_exp_get_by_name(rqstp, path);

	}

	dput(dentry);

	dput(path->dentry);

	path->dentry = saved;

	return exp;

}

fs/nfsd/vfs.c

+12 −11
Original line number Diff line number Diff line
@@ -169,28 +169,29 @@ nfsd_lookup_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp, 
			/* checking mountpoint crossing is very different when stepping up */

			struct svc_export *exp2 = NULL;

			struct dentry *dp;

			struct vfsmount *mnt = mntget(exp->ex_path.mnt);

			dentry = dget(dparent);

			while(dentry == mnt->mnt_root && follow_up(&mnt, &dentry))

			struct path path = {.mnt = mntget(exp->ex_path.mnt),

					    .dentry = dget(dparent)};



			while (path.dentry == path.mnt->mnt_root &&

			       follow_up(&path.mnt, &path.dentry))

				;

			dp = dget_parent(dentry);

			dput(dentry);

			dentry = dp;

			dp = dget_parent(path.dentry);

			dput(path.dentry);

			path.dentry = dp;



			exp2 = rqst_exp_parent(rqstp, mnt, dentry);

			exp2 = rqst_exp_parent(rqstp, &path);

			if (PTR_ERR(exp2) == -ENOENT) {

				dput(dentry);

				dentry = dget(dparent);

			} else if (IS_ERR(exp2)) {

				host_err = PTR_ERR(exp2);

				dput(dentry);

				mntput(mnt);

				path_put(&path);

				goto out_nfserr;

			} else {

				dentry = dget(path.dentry);

				exp_put(exp);

				exp = exp2;

			}

			mntput(mnt);

			path_put(&path);

		}

	} else {

		fh_lock(fhp);

include/linux/nfsd/export.h

+1 −2
Original line number Diff line number Diff line
@@ -127,8 +127,7 @@ void exp_readunlock(void); 
struct svc_export *	rqst_exp_get_by_name(struct svc_rqst *,

					     struct path *);

struct svc_export *	rqst_exp_parent(struct svc_rqst *,

					struct vfsmount *mnt,

					struct dentry *dentry);

					struct path *);

int			exp_rootfh(struct auth_domain *, 

					char *path, struct knfsd_fh *, int maxsize);

__be32			exp_pseudoroot(struct svc_rqst *, struct svc_fh *);