1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
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.
9 *
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).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #define DEBUG_SUBSYSTEM S_LOV
38
39 #include "../../include/linux/libcfs/libcfs.h"
40
41 #include "../include/obd_class.h"
42 #include "lov_internal.h"
43
44 /** Merge the lock value block(&lvb) attributes and KMS from each of the
45 * stripes in a file into a single lvb. It is expected that the caller
46 * initializes the current atime, mtime, ctime to avoid regressing a more
47 * uptodate time on the local client.
48 */
lov_merge_lvb_kms(struct lov_stripe_md * lsm,struct ost_lvb * lvb,__u64 * kms_place)49 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
50 struct ost_lvb *lvb, __u64 *kms_place)
51 {
52 __u64 size = 0;
53 __u64 kms = 0;
54 __u64 blocks = 0;
55 s64 current_mtime = lvb->lvb_mtime;
56 s64 current_atime = lvb->lvb_atime;
57 s64 current_ctime = lvb->lvb_ctime;
58 int i;
59 int rc = 0;
60
61 assert_spin_locked(&lsm->lsm_lock);
62 LASSERT(lsm->lsm_lock_owner == current_pid());
63
64 CDEBUG(D_INODE, "MDT ID "DOSTID" initial value: s=%llu m=%llu a=%llu c=%llu b=%llu\n",
65 POSTID(&lsm->lsm_oi), lvb->lvb_size, lvb->lvb_mtime,
66 lvb->lvb_atime, lvb->lvb_ctime, lvb->lvb_blocks);
67 for (i = 0; i < lsm->lsm_stripe_count; i++) {
68 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
69 u64 lov_size, tmpsize;
70
71 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
72 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
73 continue;
74 }
75
76 tmpsize = loi->loi_kms;
77 lov_size = lov_stripe_size(lsm, tmpsize, i);
78 if (lov_size > kms)
79 kms = lov_size;
80
81 if (loi->loi_lvb.lvb_size > tmpsize)
82 tmpsize = loi->loi_lvb.lvb_size;
83
84 lov_size = lov_stripe_size(lsm, tmpsize, i);
85 if (lov_size > size)
86 size = lov_size;
87 /* merge blocks, mtime, atime */
88 blocks += loi->loi_lvb.lvb_blocks;
89 if (loi->loi_lvb.lvb_mtime > current_mtime)
90 current_mtime = loi->loi_lvb.lvb_mtime;
91 if (loi->loi_lvb.lvb_atime > current_atime)
92 current_atime = loi->loi_lvb.lvb_atime;
93 if (loi->loi_lvb.lvb_ctime > current_ctime)
94 current_ctime = loi->loi_lvb.lvb_ctime;
95
96 CDEBUG(D_INODE, "MDT ID "DOSTID" on OST[%u]: s=%llu m=%llu a=%llu c=%llu b=%llu\n",
97 POSTID(&lsm->lsm_oi), loi->loi_ost_idx,
98 loi->loi_lvb.lvb_size, loi->loi_lvb.lvb_mtime,
99 loi->loi_lvb.lvb_atime, loi->loi_lvb.lvb_ctime,
100 loi->loi_lvb.lvb_blocks);
101 }
102
103 *kms_place = kms;
104 lvb->lvb_size = size;
105 lvb->lvb_blocks = blocks;
106 lvb->lvb_mtime = current_mtime;
107 lvb->lvb_atime = current_atime;
108 lvb->lvb_ctime = current_ctime;
109 return rc;
110 }
111
112 /* Must be called under the lov_stripe_lock() */
lov_adjust_kms(struct obd_export * exp,struct lov_stripe_md * lsm,u64 size,int shrink)113 int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
114 u64 size, int shrink)
115 {
116 struct lov_oinfo *loi;
117 int stripe = 0;
118 __u64 kms;
119
120 assert_spin_locked(&lsm->lsm_lock);
121 LASSERT(lsm->lsm_lock_owner == current_pid());
122
123 if (shrink) {
124 for (; stripe < lsm->lsm_stripe_count; stripe++) {
125 struct lov_oinfo *loi = lsm->lsm_oinfo[stripe];
126
127 kms = lov_size_to_stripe(lsm, size, stripe);
128 CDEBUG(D_INODE,
129 "stripe %d KMS %sing %llu->%llu\n",
130 stripe, kms > loi->loi_kms ? "increase":"shrink",
131 loi->loi_kms, kms);
132 loi_kms_set(loi, loi->loi_lvb.lvb_size = kms);
133 }
134 return 0;
135 }
136
137 if (size > 0)
138 stripe = lov_stripe_number(lsm, size - 1);
139 kms = lov_size_to_stripe(lsm, size, stripe);
140 loi = lsm->lsm_oinfo[stripe];
141
142 CDEBUG(D_INODE, "stripe %d KMS %sincreasing %llu->%llu\n",
143 stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms);
144 if (kms > loi->loi_kms)
145 loi_kms_set(loi, kms);
146
147 return 0;
148 }
149
lov_merge_attrs(struct obdo * tgt,struct obdo * src,u64 valid,struct lov_stripe_md * lsm,int stripeno,int * set)150 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, u64 valid,
151 struct lov_stripe_md *lsm, int stripeno, int *set)
152 {
153 valid &= src->o_valid;
154
155 if (*set) {
156 if (valid & OBD_MD_FLSIZE) {
157 /* this handles sparse files properly */
158 u64 lov_size;
159
160 lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
161 if (lov_size > tgt->o_size)
162 tgt->o_size = lov_size;
163 }
164 if (valid & OBD_MD_FLBLOCKS)
165 tgt->o_blocks += src->o_blocks;
166 if (valid & OBD_MD_FLBLKSZ)
167 tgt->o_blksize += src->o_blksize;
168 if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
169 tgt->o_ctime = src->o_ctime;
170 if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
171 tgt->o_mtime = src->o_mtime;
172 if (valid & OBD_MD_FLDATAVERSION)
173 tgt->o_data_version += src->o_data_version;
174 } else {
175 memcpy(tgt, src, sizeof(*tgt));
176 tgt->o_oi = lsm->lsm_oi;
177 if (valid & OBD_MD_FLSIZE)
178 tgt->o_size = lov_stripe_size(lsm, src->o_size,
179 stripeno);
180 }
181
182 /* data_version needs to be valid on all stripes to be correct! */
183 if (!(valid & OBD_MD_FLDATAVERSION))
184 tgt->o_valid &= ~OBD_MD_FLDATAVERSION;
185
186 *set += 1;
187 }
188