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 <md_object.h>
35 * Initialize new \a lma. Only fid is stored.
37 * \param lma - is the new LMA structure to be initialized
38 * \param fid - is the FID of the object this LMA belongs to
39 * \param incompat - features that MDS must understand to access object
41 void lustre_lma_init(struct lustre_mdt_attrs *lma, const struct lu_fid *fid,
42 __u32 compat, __u32 incompat)
44 lma->lma_compat = compat;
45 lma->lma_incompat = incompat;
46 lma->lma_self_fid = *fid;
48 /* If a field is added in struct lustre_mdt_attrs, zero it explicitly
49 * and change the test below. */
50 LASSERT(sizeof(*lma) ==
51 (offsetof(struct lustre_mdt_attrs, lma_self_fid) +
52 sizeof(lma->lma_self_fid)));
54 EXPORT_SYMBOL(lustre_lma_init);
57 * Swab, if needed, LMA structure which is stored on-disk in little-endian order.
59 * \param lma - is a pointer to the LMA structure to be swabbed.
61 void lustre_lma_swab(struct lustre_mdt_attrs *lma)
63 /* Use LUSTRE_MSG_MAGIC to detect local endianess. */
64 if (LUSTRE_MSG_MAGIC != cpu_to_le32(LUSTRE_MSG_MAGIC)) {
65 __swab32s(&lma->lma_compat);
66 __swab32s(&lma->lma_incompat);
67 lustre_swab_lu_fid(&lma->lma_self_fid);
70 EXPORT_SYMBOL(lustre_lma_swab);
73 * Swab, if needed, HSM structure which is stored on-disk in little-endian
76 * \param attrs - is a pointer to the HSM structure to be swabbed.
78 void lustre_hsm_swab(struct hsm_attrs *attrs)
80 /* Use LUSTRE_MSG_MAGIC to detect local endianess. */
81 if (LUSTRE_MSG_MAGIC != cpu_to_le32(LUSTRE_MSG_MAGIC)) {
82 __swab32s(&attrs->hsm_compat);
83 __swab32s(&attrs->hsm_flags);
84 __swab64s(&attrs->hsm_arch_id);
85 __swab64s(&attrs->hsm_arch_ver);
90 * Swab and extract HSM attributes from on-disk xattr.
92 * \param buf - is a buffer containing the on-disk HSM extended attribute.
93 * \param rc - is the HSM xattr stored in \a buf
94 * \param mh - is the md_hsm structure where to extract HSM attributes.
96 int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh)
98 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
101 if (rc == 0 || rc == -ENODATA)
102 /* no HSM attributes */
106 /* error hit while fetching xattr */
109 /* unpack HSM attributes */
110 lustre_hsm_swab(attrs);
112 /* fill md_hsm structure */
113 mh->mh_compat = attrs->hsm_compat;
114 mh->mh_flags = attrs->hsm_flags;
115 mh->mh_arch_id = attrs->hsm_arch_id;
116 mh->mh_arch_ver = attrs->hsm_arch_ver;
120 EXPORT_SYMBOL(lustre_buf2hsm);
123 * Pack HSM attributes.
125 * \param buf - is the output buffer where to pack the on-disk HSM xattr.
126 * \param mh - is the md_hsm structure to pack.
128 void lustre_hsm2buf(void *buf, const struct md_hsm *mh)
130 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
133 /* copy HSM attributes */
134 attrs->hsm_compat = mh->mh_compat;
135 attrs->hsm_flags = mh->mh_flags;
136 attrs->hsm_arch_id = mh->mh_arch_id;
137 attrs->hsm_arch_ver = mh->mh_arch_ver;
140 lustre_hsm_swab(attrs);
142 EXPORT_SYMBOL(lustre_hsm2buf);