+++ /dev/null
-/*
- * 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);
projects / cascardo / linux.git / commitdiff