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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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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>
46 #include "lov_internal.h"
48 /** Merge the lock value block(&lvb) attributes and KMS from each of the
49 * stripes in a file into a single lvb. It is expected that the caller
50 * initializes the current atime, mtime, ctime to avoid regressing a more
51 * uptodate time on the local client.
53 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
54 struct ost_lvb *lvb, __u64 *kms_place)
59 obd_time current_mtime = lvb->lvb_mtime;
60 obd_time current_atime = lvb->lvb_atime;
61 obd_time current_ctime = lvb->lvb_ctime;
65 assert_spin_locked(&lsm->lsm_lock);
67 LASSERT(lsm->lsm_lock_owner == current_pid());
70 CDEBUG(D_INODE, "MDT ID "DOSTID" initial value: s="LPU64" m="LPU64
71 " a="LPU64" c="LPU64" b="LPU64"\n", POSTID(&lsm->lsm_oi),
72 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime, lvb->lvb_ctime,
74 for (i = 0; i < lsm->lsm_stripe_count; i++) {
75 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
76 obd_size lov_size, tmpsize;
78 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
79 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
83 tmpsize = loi->loi_kms;
84 lov_size = lov_stripe_size(lsm, tmpsize, i);
88 if (loi->loi_lvb.lvb_size > tmpsize)
89 tmpsize = loi->loi_lvb.lvb_size;
91 lov_size = lov_stripe_size(lsm, tmpsize, i);
94 /* merge blocks, mtime, atime */
95 blocks += loi->loi_lvb.lvb_blocks;
96 if (loi->loi_lvb.lvb_mtime > current_mtime)
97 current_mtime = loi->loi_lvb.lvb_mtime;
98 if (loi->loi_lvb.lvb_atime > current_atime)
99 current_atime = loi->loi_lvb.lvb_atime;
100 if (loi->loi_lvb.lvb_ctime > current_ctime)
101 current_ctime = loi->loi_lvb.lvb_ctime;
103 CDEBUG(D_INODE, "MDT ID "DOSTID" on OST[%u]: s="LPU64" m="LPU64
104 " a="LPU64" c="LPU64" b="LPU64"\n", POSTID(&lsm->lsm_oi),
105 loi->loi_ost_idx, loi->loi_lvb.lvb_size,
106 loi->loi_lvb.lvb_mtime, loi->loi_lvb.lvb_atime,
107 loi->loi_lvb.lvb_ctime, loi->loi_lvb.lvb_blocks);
111 lvb->lvb_size = size;
112 lvb->lvb_blocks = blocks;
113 lvb->lvb_mtime = current_mtime;
114 lvb->lvb_atime = current_atime;
115 lvb->lvb_ctime = current_ctime;
119 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_valid valid,
120 struct lov_stripe_md *lsm, int stripeno, int *set)
122 valid &= src->o_valid;
125 tgt->o_valid &= valid;
126 if (valid & OBD_MD_FLSIZE) {
127 /* this handles sparse files properly */
130 lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
131 if (lov_size > tgt->o_size)
132 tgt->o_size = lov_size;
134 if (valid & OBD_MD_FLBLOCKS)
135 tgt->o_blocks += src->o_blocks;
136 if (valid & OBD_MD_FLBLKSZ)
137 tgt->o_blksize += src->o_blksize;
138 if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
139 tgt->o_ctime = src->o_ctime;
140 if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
141 tgt->o_mtime = src->o_mtime;
142 if (valid & OBD_MD_FLDATAVERSION)
143 tgt->o_data_version += src->o_data_version;
146 if (valid & OBD_MD_FLFLAGS)
147 tgt->o_flags &= src->o_flags;
151 memcpy(tgt, src, sizeof(*tgt));
152 tgt->o_oi = lsm->lsm_oi;
153 tgt->o_valid = valid;
154 if (valid & OBD_MD_FLSIZE)
155 tgt->o_size = lov_stripe_size(lsm, src->o_size,
158 if (valid & OBD_MD_FLFLAGS)
159 tgt->o_flags = src->o_flags;
162 /* data_version needs to be valid on all stripes to be correct! */
163 if (!(valid & OBD_MD_FLDATAVERSION))
164 tgt->o_valid &= ~OBD_MD_FLDATAVERSION;