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,
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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).
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_LOV
40 #include <libcfs/libcfs.h>
42 #include <liblustre.h>
45 #include <obd_class.h>
48 #include "lov_internal.h"
50 /** Merge the lock value block(&lvb) attributes and KMS from each of the
51 * stripes in a file into a single lvb. It is expected that the caller
52 * initializes the current atime, mtime, ctime to avoid regressing a more
53 * uptodate time on the local client.
55 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
56 struct ost_lvb *lvb, __u64 *kms_place)
61 obd_time current_mtime = lvb->lvb_mtime;
62 obd_time current_atime = lvb->lvb_atime;
63 obd_time current_ctime = lvb->lvb_ctime;
67 LASSERT_SPIN_LOCKED(&lsm->lsm_lock);
69 LASSERT(lsm->lsm_lock_owner == cfs_curproc_pid());
72 CDEBUG(D_INODE, "MDT ID "DOSTID" initial value: s="LPU64" m="LPU64
73 " a="LPU64" c="LPU64" b="LPU64"\n", POSTID(&lsm->lsm_oi),
74 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime, lvb->lvb_ctime,
76 for (i = 0; i < lsm->lsm_stripe_count; i++) {
77 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
78 obd_size lov_size, tmpsize;
80 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
81 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
85 tmpsize = loi->loi_kms;
86 lov_size = lov_stripe_size(lsm, tmpsize, i);
90 if (loi->loi_lvb.lvb_size > tmpsize)
91 tmpsize = loi->loi_lvb.lvb_size;
93 lov_size = lov_stripe_size(lsm, tmpsize, i);
96 /* merge blocks, mtime, atime */
97 blocks += loi->loi_lvb.lvb_blocks;
98 if (loi->loi_lvb.lvb_mtime > current_mtime)
99 current_mtime = loi->loi_lvb.lvb_mtime;
100 if (loi->loi_lvb.lvb_atime > current_atime)
101 current_atime = loi->loi_lvb.lvb_atime;
102 if (loi->loi_lvb.lvb_ctime > current_ctime)
103 current_ctime = loi->loi_lvb.lvb_ctime;
105 CDEBUG(D_INODE, "MDT ID "DOSTID" on OST[%u]: s="LPU64" m="LPU64
106 " a="LPU64" c="LPU64" b="LPU64"\n", POSTID(&lsm->lsm_oi),
107 loi->loi_ost_idx, loi->loi_lvb.lvb_size,
108 loi->loi_lvb.lvb_mtime, loi->loi_lvb.lvb_atime,
109 loi->loi_lvb.lvb_ctime, loi->loi_lvb.lvb_blocks);
113 lvb->lvb_size = size;
114 lvb->lvb_blocks = blocks;
115 lvb->lvb_mtime = current_mtime;
116 lvb->lvb_atime = current_atime;
117 lvb->lvb_ctime = current_ctime;
121 /** Merge the lock value block(&lvb) attributes from each of the stripes in a
122 * file into a single lvb. It is expected that the caller initializes the
123 * current atime, mtime, ctime to avoid regressing a more uptodate time on
126 * If \a kms_only is set then we do not consider the recently seen size (rss)
127 * when updating the known minimum size (kms). Even when merging RSS, we will
128 * take the KMS value if it's larger. This prevents getattr from stomping on
129 * dirty cached pages which extend the file size. */
130 int lov_merge_lvb(struct obd_export *exp,
131 struct lov_stripe_md *lsm, struct ost_lvb *lvb, int kms_only)
137 lov_stripe_lock(lsm);
138 rc = lov_merge_lvb_kms(lsm, lvb, &kms);
139 lov_stripe_unlock(lsm);
143 CDEBUG(D_INODE, "merged for ID "DOSTID" s="LPU64" m="LPU64" a="LPU64
144 " c="LPU64" b="LPU64"\n", POSTID(&lsm->lsm_oi), lvb->lvb_size,
145 lvb->lvb_mtime, lvb->lvb_atime, lvb->lvb_ctime, lvb->lvb_blocks);
149 /* Must be called under the lov_stripe_lock() */
150 int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
151 obd_off size, int shrink)
153 struct lov_oinfo *loi;
158 LASSERT_SPIN_LOCKED(&lsm->lsm_lock);
160 LASSERT(lsm->lsm_lock_owner == cfs_curproc_pid());
164 for (; stripe < lsm->lsm_stripe_count; stripe++) {
165 struct lov_oinfo *loi = lsm->lsm_oinfo[stripe];
166 kms = lov_size_to_stripe(lsm, size, stripe);
168 "stripe %d KMS %sing "LPU64"->"LPU64"\n",
169 stripe, kms > loi->loi_kms ? "increas":"shrink",
171 loi_kms_set(loi, loi->loi_lvb.lvb_size = kms);
177 stripe = lov_stripe_number(lsm, size - 1);
178 kms = lov_size_to_stripe(lsm, size, stripe);
179 loi = lsm->lsm_oinfo[stripe];
181 CDEBUG(D_INODE, "stripe %d KMS %sincreasing "LPU64"->"LPU64"\n",
182 stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms);
183 if (kms > loi->loi_kms)
184 loi_kms_set(loi, kms);
189 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_valid valid,
190 struct lov_stripe_md *lsm, int stripeno, int *set)
192 valid &= src->o_valid;
195 if (valid & OBD_MD_FLSIZE) {
196 /* this handles sparse files properly */
199 lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
200 if (lov_size > tgt->o_size)
201 tgt->o_size = lov_size;
203 if (valid & OBD_MD_FLBLOCKS)
204 tgt->o_blocks += src->o_blocks;
205 if (valid & OBD_MD_FLBLKSZ)
206 tgt->o_blksize += src->o_blksize;
207 if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
208 tgt->o_ctime = src->o_ctime;
209 if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
210 tgt->o_mtime = src->o_mtime;
211 if (valid & OBD_MD_FLDATAVERSION)
212 tgt->o_data_version += src->o_data_version;
214 memcpy(tgt, src, sizeof(*tgt));
215 tgt->o_oi = lsm->lsm_oi;
216 if (valid & OBD_MD_FLSIZE)
217 tgt->o_size = lov_stripe_size(lsm, src->o_size,
221 /* data_version needs to be valid on all stripes to be correct! */
222 if (!(valid & OBD_MD_FLDATAVERSION))
223 tgt->o_valid &= ~OBD_MD_FLDATAVERSION;