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Commit bad0dcff authored by Al Viro's avatar Al Viro
Browse files

new helpers: fh_{want,drop}_write() 



A bunch of places in nfsd does mnt_{want,drop}_write on vfsmount of
export of given fhandle.  Switched to obvious inlined helpers...

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent a561be71

fs/nfsd/nfs4proc.c

+2 −2
Original line number Diff line number Diff line
@@ -838,7 +838,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 
			return status;

		}

	}

	status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt);

	status = fh_want_write(&cstate->current_fh);

	if (status)

		return status;

	status = nfs_ok;
@@ -856,7 +856,7 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 
	status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,

				0, (time_t)0);

out:

	mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt);

	fh_drop_write(&cstate->current_fh);

	return status;

}

fs/nfsd/vfs.c

+17 −17
Original line number Diff line number Diff line
@@ -1300,7 +1300,7 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, 
		goto out;

	}



	host_err = mnt_want_write(fhp->fh_export->ex_path.mnt);

	host_err = fh_want_write(fhp);

	if (host_err)

		goto out_nfserr;
@@ -1325,7 +1325,7 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, 
		break;

	}

	if (host_err < 0) {

		mnt_drop_write(fhp->fh_export->ex_path.mnt);

		fh_drop_write(fhp);

		goto out_nfserr;

	}
@@ -1339,7 +1339,7 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, 
	err2 = nfserrno(commit_metadata(fhp));

	if (err2)

		err = err2;

	mnt_drop_write(fhp->fh_export->ex_path.mnt);

	fh_drop_write(fhp);

	/*

	 * Update the file handle to get the new inode info.

	 */
@@ -1430,7 +1430,7 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, 
		v_atime = verifier[1]&0x7fffffff;

	}

	

	host_err = mnt_want_write(fhp->fh_export->ex_path.mnt);

	host_err = fh_want_write(fhp);

	if (host_err)

		goto out_nfserr;

	if (dchild->d_inode) {
@@ -1469,13 +1469,13 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, 
		case NFS3_CREATE_GUARDED:

			err = nfserr_exist;

		}

		mnt_drop_write(fhp->fh_export->ex_path.mnt);

		fh_drop_write(fhp);

		goto out;

	}



	host_err = vfs_create(dirp, dchild, iap->ia_mode, NULL);

	if (host_err < 0) {

		mnt_drop_write(fhp->fh_export->ex_path.mnt);

		fh_drop_write(fhp);

		goto out_nfserr;

	}

	if (created)
@@ -1503,7 +1503,7 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp, 
	if (!err)

		err = nfserrno(commit_metadata(fhp));



	mnt_drop_write(fhp->fh_export->ex_path.mnt);

	fh_drop_write(fhp);

	/*

	 * Update the filehandle to get the new inode info.

	 */
@@ -1600,7 +1600,7 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp, 
	if (IS_ERR(dnew))

		goto out_nfserr;



	host_err = mnt_want_write(fhp->fh_export->ex_path.mnt);

	host_err = fh_want_write(fhp);

	if (host_err)

		goto out_nfserr;
@@ -1621,7 +1621,7 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp, 
		err = nfserrno(commit_metadata(fhp));

	fh_unlock(fhp);



	mnt_drop_write(fhp->fh_export->ex_path.mnt);

	fh_drop_write(fhp);



	cerr = fh_compose(resfhp, fhp->fh_export, dnew, fhp);

	dput(dnew);
@@ -1674,7 +1674,7 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp, 


	dold = tfhp->fh_dentry;



	host_err = mnt_want_write(tfhp->fh_export->ex_path.mnt);

	host_err = fh_want_write(tfhp);

	if (host_err) {

		err = nfserrno(host_err);

		goto out_dput;
@@ -1699,7 +1699,7 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp, 
			err = nfserrno(host_err);

	}

out_drop_write:

	mnt_drop_write(tfhp->fh_export->ex_path.mnt);

	fh_drop_write(tfhp);

out_dput:

	dput(dnew);

out_unlock:
@@ -1776,7 +1776,7 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen, 
	host_err = -EXDEV;

	if (ffhp->fh_export->ex_path.mnt != tfhp->fh_export->ex_path.mnt)

		goto out_dput_new;

	host_err = mnt_want_write(ffhp->fh_export->ex_path.mnt);

	host_err = fh_want_write(ffhp);

	if (host_err)

		goto out_dput_new;
@@ -1795,7 +1795,7 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen, 
			host_err = commit_metadata(ffhp);

	}

out_drop_write:

	mnt_drop_write(ffhp->fh_export->ex_path.mnt);

	fh_drop_write(ffhp);

 out_dput_new:

	dput(ndentry);

 out_dput_old:
@@ -1854,7 +1854,7 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, 
	if (!type)

		type = rdentry->d_inode->i_mode & S_IFMT;



	host_err = mnt_want_write(fhp->fh_export->ex_path.mnt);

	host_err = fh_want_write(fhp);

	if (host_err)

		goto out_put;
@@ -1868,7 +1868,7 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type, 
	if (!host_err)

		host_err = commit_metadata(fhp);

out_drop_write:

	mnt_drop_write(fhp->fh_export->ex_path.mnt);

	fh_drop_write(fhp);

out_put:

	dput(rdentry);
@@ -2270,7 +2270,7 @@ nfsd_set_posix_acl(struct svc_fh *fhp, int type, struct posix_acl *acl) 
	} else

		size = 0;



	error = mnt_want_write(fhp->fh_export->ex_path.mnt);

	error = fh_want_write(fhp);

	if (error)

		goto getout;

	if (size)
@@ -2284,7 +2284,7 @@ nfsd_set_posix_acl(struct svc_fh *fhp, int type, struct posix_acl *acl) 
				error = 0;

		}

	}

	mnt_drop_write(fhp->fh_export->ex_path.mnt);

	fh_drop_write(fhp);



getout:

	kfree(value);

fs/nfsd/vfs.h

+10 −0
Original line number Diff line number Diff line
@@ -106,4 +106,14 @@ struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int); 
int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);

#endif



static inline int fh_want_write(struct svc_fh *fh)

{

	return mnt_want_write(fh->fh_export->ex_path.mnt);

}



static inline void fh_drop_write(struct svc_fh *fh)

{

	mnt_drop_write(fh->fh_export->ex_path.mnt);

}



#endif /* LINUX_NFSD_VFS_H */