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, 2017, Intel Corporation.
25 * Use is subject to license terms.
27 * Author: Johann Lombardi <johann.lombardi@intel.com>
29 #include <llog_swab.h>
30 #include <lustre_swab.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 CLASSERT(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)
64 __swab32s(&lma->lma_compat);
65 __swab32s(&lma->lma_incompat);
66 lustre_swab_lu_fid(&lma->lma_self_fid);
69 EXPORT_SYMBOL(lustre_lma_swab);
71 void lustre_loa_init(struct lustre_ost_attrs *loa, const struct lu_fid *fid,
72 __u32 compat, __u32 incompat)
74 CLASSERT(sizeof(*loa) == LMA_OLD_SIZE);
76 memset(&loa->loa_parent_fid, 0,
77 sizeof(*loa) - offsetof(typeof(*loa), loa_parent_fid));
78 lustre_lma_init(&loa->loa_lma, fid, compat, incompat);
80 EXPORT_SYMBOL(lustre_loa_init);
83 * Swab, if needed, LOA (for OST-object only) structure with LMA EA and PFID EA
84 * combined together are stored on-disk in little-endian order.
86 * \param[in] loa - the pointer to the LOA structure to be swabbed.
87 * \param[in] to_cpu - to indicate swab for CPU order or not.
89 void lustre_loa_swab(struct lustre_ost_attrs *loa, bool to_cpu)
91 struct lustre_mdt_attrs *lma = &loa->loa_lma;
93 __u32 compat = lma->lma_compat;
99 compat = lma->lma_compat;
101 if (compat & LMAC_STRIPE_INFO) {
102 lustre_swab_lu_fid(&loa->loa_parent_fid);
103 __swab32s(&loa->loa_stripe_size);
105 if (compat & LMAC_COMP_INFO) {
106 __swab32s(&loa->loa_comp_id);
107 __swab64s(&loa->loa_comp_start);
108 __swab64s(&loa->loa_comp_end);
112 EXPORT_SYMBOL(lustre_loa_swab);
115 * Swab, if needed, SOM structure which is stored on-disk in little-endian
118 * \param attrs - is a pointer to the SOM structure to be swabbed.
120 void lustre_som_swab(struct lustre_som_attrs *attrs)
123 __swab16s(&attrs->lsa_valid);
124 __swab64s(&attrs->lsa_size);
125 __swab64s(&attrs->lsa_blocks);
128 EXPORT_SYMBOL(lustre_som_swab);
131 * Swab, if needed, HSM structure which is stored on-disk in little-endian
134 * \param attrs - is a pointer to the HSM structure to be swabbed.
136 void lustre_hsm_swab(struct hsm_attrs *attrs)
139 __swab32s(&attrs->hsm_compat);
140 __swab32s(&attrs->hsm_flags);
141 __swab64s(&attrs->hsm_arch_id);
142 __swab64s(&attrs->hsm_arch_ver);
147 * Swab and extract HSM attributes from on-disk xattr.
149 * \param buf - is a buffer containing the on-disk HSM extended attribute.
150 * \param rc - is the HSM xattr stored in \a buf
151 * \param mh - is the md_hsm structure where to extract HSM attributes.
153 int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh)
155 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
158 if (rc == 0 || rc == -ENODATA)
159 /* no HSM attributes */
163 /* error hit while fetching xattr */
166 /* unpack HSM attributes */
167 lustre_hsm_swab(attrs);
169 /* fill md_hsm structure */
170 mh->mh_compat = attrs->hsm_compat;
171 mh->mh_flags = attrs->hsm_flags;
172 mh->mh_arch_id = attrs->hsm_arch_id;
173 mh->mh_arch_ver = attrs->hsm_arch_ver;
177 EXPORT_SYMBOL(lustre_buf2hsm);
180 * Pack HSM attributes.
182 * \param buf - is the output buffer where to pack the on-disk HSM xattr.
183 * \param mh - is the md_hsm structure to pack.
185 void lustre_hsm2buf(void *buf, const struct md_hsm *mh)
187 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
190 /* copy HSM attributes */
191 attrs->hsm_compat = mh->mh_compat;
192 attrs->hsm_flags = mh->mh_flags;
193 attrs->hsm_arch_id = mh->mh_arch_id;
194 attrs->hsm_arch_ver = mh->mh_arch_ver;
197 lustre_hsm_swab(attrs);
199 EXPORT_SYMBOL(lustre_hsm2buf);