staging/lustre/obdclass: remove unused file md_attrs.c

It's only used by server side luster for on-disk structure swabbing.

And also remove forward declarations for its functions from
md_object.h and lustre_idl.h
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/include/lustre/lustre_idl.h

@@ -321,9 +321,6 @@ enum lma_incompat {
 };
 #define LMA_INCOMPAT_SUPP	(LMAI_AGENT | LMAI_REMOTE_PARENT)
 
-extern void lustre_lma_swab(struct lustre_mdt_attrs *lma);
-extern void lustre_lma_init(struct lustre_mdt_attrs *lma,
-			    const struct lu_fid *fid, __u32 incompat);
 /**
  * SOM on-disk attributes stored in a separate xattr.
  */
@@ -344,8 +341,6 @@ struct som_attrs {
 	/** mds mount id the size is valid for */
 	__u64	som_mountid;
 };
-extern void lustre_som_swab(struct som_attrs *attrs);
-
 #define SOM_INCOMPAT_SUPP 0x0
 
 /**
@@ -362,7 +357,6 @@ struct hsm_attrs {
 	/** version associated with the last archiving, if any */
 	__u64	hsm_arch_ver;
 };
-extern void lustre_hsm_swab(struct hsm_attrs *attrs);
 
 /**
  * fid constants

drivers/staging/lustre/lustre/include/md_object.h

@@ -854,10 +854,6 @@ struct lu_local_obj_desc {
 	struct list_head		       llod_linkage;
 };
 
-int lustre_buf2som(void *buf, int rc, struct md_som_data *msd);
-int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh);
-void lustre_hsm2buf(void *buf, struct md_hsm *mh);
-
 struct lu_ucred {
 	__u32	       uc_valid;
 	__u32	       uc_o_uid;

drivers/staging/lustre/lustre/obdclass/md_attrs.c

-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2012, Intel Corporation.
- * Use is subject to license terms.
- *
- * Author: Johann Lombardi <johann.lombardi@intel.com>
- */
-
-#include "../include/lustre/lustre_idl.h"
-#include "../include/obd.h"
-#include "../include/md_object.h"
-
-/**
- * Initialize new \a lma. Only fid is stored.
- *
- * \param lma - is the new LMA structure to be initialized
- * \param fid - is the FID of the object this LMA belongs to
- * \param incompat - features that MDS must understand to access object
- */
-void lustre_lma_init(struct lustre_mdt_attrs *lma, const struct lu_fid *fid,
-		     __u32 incompat)
-{
-	lma->lma_compat   = 0;
-	lma->lma_incompat = incompat;
-	lma->lma_self_fid = *fid;
-
-	/* If a field is added in struct lustre_mdt_attrs, zero it explicitly
-	 * and change the test below. */
-	LASSERT(sizeof(*lma) ==
-		(offsetof(struct lustre_mdt_attrs, lma_self_fid) +
-		 sizeof(lma->lma_self_fid)));
-};
-EXPORT_SYMBOL(lustre_lma_init);
-
-/**
- * Swab, if needed, LMA structure which is stored on-disk in little-endian order.
- *
- * \param lma - is a pointer to the LMA structure to be swabbed.
- */
-void lustre_lma_swab(struct lustre_mdt_attrs *lma)
-{
-	/* Use LUSTRE_MSG_MAGIC to detect local endianness. */
-	if (LUSTRE_MSG_MAGIC != cpu_to_le32(LUSTRE_MSG_MAGIC)) {
-		__swab32s(&lma->lma_compat);
-		__swab32s(&lma->lma_incompat);
-		lustre_swab_lu_fid(&lma->lma_self_fid);
-	}
-};
-EXPORT_SYMBOL(lustre_lma_swab);
-
-/**
- * Swab, if needed, SOM structure which is stored on-disk in little-endian
- * order.
- *
- * \param attrs - is a pointer to the SOM structure to be swabbed.
- */
-void lustre_som_swab(struct som_attrs *attrs)
-{
-	/* Use LUSTRE_MSG_MAGIC to detect local endianness. */
-	if (LUSTRE_MSG_MAGIC != cpu_to_le32(LUSTRE_MSG_MAGIC)) {
-		__swab32s(&attrs->som_compat);
-		__swab32s(&attrs->som_incompat);
-		__swab64s(&attrs->som_ioepoch);
-		__swab64s(&attrs->som_size);
-		__swab64s(&attrs->som_blocks);
-		__swab64s(&attrs->som_mountid);
-	}
-};
-EXPORT_SYMBOL(lustre_som_swab);
-
-/*
- * Swab and extract SOM attributes from on-disk xattr.
- *
- * \param buf - is a buffer containing the on-disk SOM extended attribute.
- * \param rc  - is the SOM xattr stored in \a buf
- * \param msd - is the md_som_data structure where to extract SOM attributes.
- */
-int lustre_buf2som(void *buf, int rc, struct md_som_data *msd)
-{
-	struct som_attrs *attrs = (struct som_attrs *)buf;
-
-	if (rc == 0 ||  rc == -ENODATA)
-		/* no SOM attributes */
-		return -ENODATA;
-
-	if (rc < 0)
-		/* error hit while fetching xattr */
-		return rc;
-
-	/* check SOM compatibility */
-	if (attrs->som_incompat & ~cpu_to_le32(SOM_INCOMPAT_SUPP))
-		return -ENODATA;
-
-	/* unpack SOM attributes */
-	lustre_som_swab(attrs);
-
-	/* fill in-memory msd structure */
-	msd->msd_compat   = attrs->som_compat;
-	msd->msd_incompat = attrs->som_incompat;
-	msd->msd_ioepoch  = attrs->som_ioepoch;
-	msd->msd_size     = attrs->som_size;
-	msd->msd_blocks   = attrs->som_blocks;
-	msd->msd_mountid  = attrs->som_mountid;
-
-	return 0;
-}
-EXPORT_SYMBOL(lustre_buf2som);
-
-/**
- * Swab, if needed, HSM structure which is stored on-disk in little-endian
- * order.
- *
- * \param attrs - is a pointer to the HSM structure to be swabbed.
- */
-void lustre_hsm_swab(struct hsm_attrs *attrs)
-{
-	/* Use LUSTRE_MSG_MAGIC to detect local endianness. */
-	if (LUSTRE_MSG_MAGIC != cpu_to_le32(LUSTRE_MSG_MAGIC)) {
-		__swab32s(&attrs->hsm_compat);
-		__swab32s(&attrs->hsm_flags);
-		__swab64s(&attrs->hsm_arch_id);
-		__swab64s(&attrs->hsm_arch_ver);
-	}
-};
-EXPORT_SYMBOL(lustre_hsm_swab);
-
-/*
- * Swab and extract HSM attributes from on-disk xattr.
- *
- * \param buf - is a buffer containing the on-disk HSM extended attribute.
- * \param rc  - is the HSM xattr stored in \a buf
- * \param mh  - is the md_hsm structure where to extract HSM attributes.
- */
-int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh)
-{
-	struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
-
-	if (rc == 0 ||  rc == -ENODATA)
-		/* no HSM attributes */
-		return -ENODATA;
-
-	if (rc < 0)
-		/* error hit while fetching xattr */
-		return rc;
-
-	/* unpack HSM attributes */
-	lustre_hsm_swab(attrs);
-
-	/* fill md_hsm structure */
-	mh->mh_compat   = attrs->hsm_compat;
-	mh->mh_flags    = attrs->hsm_flags;
-	mh->mh_arch_id  = attrs->hsm_arch_id;
-	mh->mh_arch_ver = attrs->hsm_arch_ver;
-
-	return 0;
-}
-EXPORT_SYMBOL(lustre_buf2hsm);
-
-/*
- * Pack HSM attributes.
- *
- * \param buf - is the output buffer where to pack the on-disk HSM xattr.
- * \param mh  - is the md_hsm structure to pack.
- */
-void lustre_hsm2buf(void *buf, struct md_hsm *mh)
-{
-	struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
-
-	/* copy HSM attributes */
-	attrs->hsm_compat   = mh->mh_compat;
-	attrs->hsm_flags    = mh->mh_flags;
-	attrs->hsm_arch_id  = mh->mh_arch_id;
-	attrs->hsm_arch_ver = mh->mh_arch_ver;
-
-	/* pack xattr */
-	lustre_hsm_swab(attrs);
-}
-EXPORT_SYMBOL(lustre_hsm2buf);