4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 021110-1307, USA
24 * Copyright (c) 2012, 2013, Intel Corporation.
25 * Use is subject to license terms.
27 * Author: Johann Lombardi <johann.lombardi@intel.com>
30 #include <lustre/lustre_idl.h>
32 #include <llog_swab.h>
33 #include <lustre_swab.h>
35 #include <md_object.h>
38 * Initialize new \a lma. Only fid is stored.
40 * \param lma - is the new LMA structure to be initialized
41 * \param fid - is the FID of the object this LMA belongs to
42 * \param incompat - features that MDS must understand to access object
44 void lustre_lma_init(struct lustre_mdt_attrs *lma, const struct lu_fid *fid,
45 __u32 compat, __u32 incompat)
47 lma->lma_compat = compat;
48 lma->lma_incompat = incompat;
49 lma->lma_self_fid = *fid;
51 /* If a field is added in struct lustre_mdt_attrs, zero it explicitly
52 * and change the test below. */
53 LASSERT(sizeof(*lma) ==
54 (offsetof(struct lustre_mdt_attrs, lma_self_fid) +
55 sizeof(lma->lma_self_fid)));
57 EXPORT_SYMBOL(lustre_lma_init);
60 * Swab, if needed, LMA structure which is stored on-disk in little-endian order.
62 * \param lma - is a pointer to the LMA structure to be swabbed.
64 void lustre_lma_swab(struct lustre_mdt_attrs *lma)
67 __swab32s(&lma->lma_compat);
68 __swab32s(&lma->lma_incompat);
69 lustre_swab_lu_fid(&lma->lma_self_fid);
72 EXPORT_SYMBOL(lustre_lma_swab);
75 * Swab, if needed, HSM structure which is stored on-disk in little-endian
78 * \param attrs - is a pointer to the HSM structure to be swabbed.
80 void lustre_hsm_swab(struct hsm_attrs *attrs)
83 __swab32s(&attrs->hsm_compat);
84 __swab32s(&attrs->hsm_flags);
85 __swab64s(&attrs->hsm_arch_id);
86 __swab64s(&attrs->hsm_arch_ver);
91 * Swab and extract HSM attributes from on-disk xattr.
93 * \param buf - is a buffer containing the on-disk HSM extended attribute.
94 * \param rc - is the HSM xattr stored in \a buf
95 * \param mh - is the md_hsm structure where to extract HSM attributes.
97 int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh)
99 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
102 if (rc == 0 || rc == -ENODATA)
103 /* no HSM attributes */
107 /* error hit while fetching xattr */
110 /* unpack HSM attributes */
111 lustre_hsm_swab(attrs);
113 /* fill md_hsm structure */
114 mh->mh_compat = attrs->hsm_compat;
115 mh->mh_flags = attrs->hsm_flags;
116 mh->mh_arch_id = attrs->hsm_arch_id;
117 mh->mh_arch_ver = attrs->hsm_arch_ver;
121 EXPORT_SYMBOL(lustre_buf2hsm);
124 * Pack HSM attributes.
126 * \param buf - is the output buffer where to pack the on-disk HSM xattr.
127 * \param mh - is the md_hsm structure to pack.
129 void lustre_hsm2buf(void *buf, const struct md_hsm *mh)
131 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
134 /* copy HSM attributes */
135 attrs->hsm_compat = mh->mh_compat;
136 attrs->hsm_flags = mh->mh_flags;
137 attrs->hsm_arch_id = mh->mh_arch_id;
138 attrs->hsm_arch_ver = mh->mh_arch_ver;
141 lustre_hsm_swab(attrs);
143 EXPORT_SYMBOL(lustre_hsm2buf);