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 BUILD_BUG_ON(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 BUILD_BUG_ON(sizeof(*loa) != LMA_OLD_SIZE);
76 memset_startat(loa, 0, loa_parent_fid);
77 lustre_lma_init(&loa->loa_lma, fid, compat, incompat);
79 EXPORT_SYMBOL(lustre_loa_init);
82 * Swab, if needed, LOA (for OST-object only) structure with LMA EA and PFID EA
83 * combined together are stored on-disk in little-endian order.
85 * \param[in] loa - the pointer to the LOA structure to be swabbed.
86 * \param[in] to_cpu - to indicate swab for CPU order or not.
88 void lustre_loa_swab(struct lustre_ost_attrs *loa, bool to_cpu)
90 struct lustre_mdt_attrs *lma = &loa->loa_lma;
92 __u32 compat = lma->lma_compat;
98 compat = lma->lma_compat;
100 if (compat & LMAC_STRIPE_INFO) {
101 lustre_swab_lu_fid(&loa->loa_parent_fid);
102 __swab32s(&loa->loa_stripe_size);
104 if (compat & LMAC_COMP_INFO) {
105 __swab32s(&loa->loa_comp_id);
106 __swab64s(&loa->loa_comp_start);
107 __swab64s(&loa->loa_comp_end);
111 EXPORT_SYMBOL(lustre_loa_swab);
114 * Swab, if needed, SOM structure which is stored on-disk in little-endian
117 * \param attrs - is a pointer to the SOM structure to be swabbed.
119 void lustre_som_swab(struct lustre_som_attrs *attrs)
122 __swab16s(&attrs->lsa_valid);
123 __swab64s(&attrs->lsa_size);
124 __swab64s(&attrs->lsa_blocks);
127 EXPORT_SYMBOL(lustre_som_swab);
130 * Swab, if needed, HSM structure which is stored on-disk in little-endian
133 * \param attrs - is a pointer to the HSM structure to be swabbed.
135 void lustre_hsm_swab(struct hsm_attrs *attrs)
138 __swab32s(&attrs->hsm_compat);
139 __swab32s(&attrs->hsm_flags);
140 __swab64s(&attrs->hsm_arch_id);
141 __swab64s(&attrs->hsm_arch_ver);
146 * Swab and extract HSM attributes from on-disk xattr.
148 * \param buf - is a buffer containing the on-disk HSM extended attribute.
149 * \param rc - is the HSM xattr stored in \a buf
150 * \param mh - is the md_hsm structure where to extract HSM attributes.
152 int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh)
154 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
157 if (rc == 0 || rc == -ENODATA)
158 /* no HSM attributes */
162 /* error hit while fetching xattr */
165 /* unpack HSM attributes */
166 lustre_hsm_swab(attrs);
168 /* fill md_hsm structure */
169 mh->mh_compat = attrs->hsm_compat;
170 mh->mh_flags = attrs->hsm_flags;
171 mh->mh_arch_id = attrs->hsm_arch_id;
172 mh->mh_arch_ver = attrs->hsm_arch_ver;
176 EXPORT_SYMBOL(lustre_buf2hsm);
179 * Pack HSM attributes.
181 * \param buf - is the output buffer where to pack the on-disk HSM xattr.
182 * \param mh - is the md_hsm structure to pack.
184 void lustre_hsm2buf(void *buf, const struct md_hsm *mh)
186 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
189 /* copy HSM attributes */
190 attrs->hsm_compat = mh->mh_compat;
191 attrs->hsm_flags = mh->mh_flags;
192 attrs->hsm_arch_id = mh->mh_arch_id;
193 attrs->hsm_arch_ver = mh->mh_arch_ver;
196 lustre_hsm_swab(attrs);
198 EXPORT_SYMBOL(lustre_hsm2buf);