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, SOM structure which is stored on-disk in little-endian
76 * \param attrs - is a pointer to the SOM structure to be swabbed.
78 void lustre_som_swab(struct som_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->som_compat);
83 __swab32s(&attrs->som_incompat);
84 __swab64s(&attrs->som_ioepoch);
85 __swab64s(&attrs->som_size);
86 __swab64s(&attrs->som_blocks);
87 __swab64s(&attrs->som_mountid);
90 EXPORT_SYMBOL(lustre_som_swab);
93 * Swab and extract SOM attributes from on-disk xattr.
95 * \param buf - is a buffer containing the on-disk SOM extended attribute.
96 * \param rc - is the SOM xattr stored in \a buf
97 * \param msd - is the md_som_data structure where to extract SOM attributes.
99 int lustre_buf2som(void *buf, int rc, struct md_som_data *msd)
101 struct som_attrs *attrs = (struct som_attrs *)buf;
104 if (rc == 0 || rc == -ENODATA)
105 /* no SOM attributes */
109 /* error hit while fetching xattr */
112 /* check SOM compatibility */
113 if (attrs->som_incompat & ~cpu_to_le32(SOM_INCOMPAT_SUPP))
116 /* unpack SOM attributes */
117 lustre_som_swab(attrs);
119 /* fill in-memory msd structure */
120 msd->msd_compat = attrs->som_compat;
121 msd->msd_incompat = attrs->som_incompat;
122 msd->msd_ioepoch = attrs->som_ioepoch;
123 msd->msd_size = attrs->som_size;
124 msd->msd_blocks = attrs->som_blocks;
125 msd->msd_mountid = attrs->som_mountid;
129 EXPORT_SYMBOL(lustre_buf2som);
132 * Swab, if needed, HSM structure which is stored on-disk in little-endian
135 * \param attrs - is a pointer to the HSM structure to be swabbed.
137 void lustre_hsm_swab(struct hsm_attrs *attrs)
139 /* Use LUSTRE_MSG_MAGIC to detect local endianess. */
140 if (LUSTRE_MSG_MAGIC != cpu_to_le32(LUSTRE_MSG_MAGIC)) {
141 __swab32s(&attrs->hsm_compat);
142 __swab32s(&attrs->hsm_flags);
143 __swab64s(&attrs->hsm_arch_id);
144 __swab64s(&attrs->hsm_arch_ver);
147 EXPORT_SYMBOL(lustre_hsm_swab);
150 * Swab and extract HSM attributes from on-disk xattr.
152 * \param buf - is a buffer containing the on-disk HSM extended attribute.
153 * \param rc - is the HSM xattr stored in \a buf
154 * \param mh - is the md_hsm structure where to extract HSM attributes.
156 int lustre_buf2hsm(void *buf, int rc, struct md_hsm *mh)
158 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
161 if (rc == 0 || rc == -ENODATA)
162 /* no HSM attributes */
166 /* error hit while fetching xattr */
169 /* unpack HSM attributes */
170 lustre_hsm_swab(attrs);
172 /* fill md_hsm structure */
173 mh->mh_compat = attrs->hsm_compat;
174 mh->mh_flags = attrs->hsm_flags;
175 mh->mh_arch_id = attrs->hsm_arch_id;
176 mh->mh_arch_ver = attrs->hsm_arch_ver;
180 EXPORT_SYMBOL(lustre_buf2hsm);
183 * Pack HSM attributes.
185 * \param buf - is the output buffer where to pack the on-disk HSM xattr.
186 * \param mh - is the md_hsm structure to pack.
188 void lustre_hsm2buf(void *buf, const struct md_hsm *mh)
190 struct hsm_attrs *attrs = (struct hsm_attrs *)buf;
193 /* copy HSM attributes */
194 attrs->hsm_compat = mh->mh_compat;
195 attrs->hsm_flags = mh->mh_flags;
196 attrs->hsm_arch_id = mh->mh_arch_id;
197 attrs->hsm_arch_ver = mh->mh_arch_ver;
200 lustre_hsm_swab(attrs);
202 EXPORT_SYMBOL(lustre_hsm2buf);