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14 * in the LICENSE file that accompanied this code).
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29 * This file is part of Lustre, http://www.lustre.org/
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33 #define DEBUG_SUBSYSTEM S_LOV
35 #include <libcfs/libcfs.h>
37 #include <obd_class.h>
38 #include "lov_internal.h"
40 /** Merge the lock value block(&lvb) attributes and KMS from each of the
41 * stripes in a file into a single lvb. It is expected that the caller
42 * initializes the current atime, mtime, ctime to avoid regressing a more
43 * uptodate time on the local client.
45 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
46 struct ost_lvb *lvb, __u64 *kms_place)
51 s64 current_mtime = lvb->lvb_mtime;
52 s64 current_atime = lvb->lvb_atime;
53 s64 current_ctime = lvb->lvb_ctime;
57 assert_spin_locked(&lsm->lsm_lock);
58 LASSERT(lsm->lsm_lock_owner == current_pid());
60 CDEBUG(D_INODE, "MDT ID "DOSTID" initial value: s=%llu m=%llu"
61 " a=%llu c=%llu b=%llu\n", POSTID(&lsm->lsm_oi),
62 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime, lvb->lvb_ctime,
64 for (i = 0; i < lsm->lsm_stripe_count; i++) {
65 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
69 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
70 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
74 tmpsize = loi->loi_kms;
75 lov_size = lov_stripe_size(lsm, tmpsize, i);
79 if (loi->loi_lvb.lvb_size > tmpsize)
80 tmpsize = loi->loi_lvb.lvb_size;
82 lov_size = lov_stripe_size(lsm, tmpsize, i);
85 /* merge blocks, mtime, atime */
86 blocks += loi->loi_lvb.lvb_blocks;
87 if (loi->loi_lvb.lvb_mtime > current_mtime)
88 current_mtime = loi->loi_lvb.lvb_mtime;
89 if (loi->loi_lvb.lvb_atime > current_atime)
90 current_atime = loi->loi_lvb.lvb_atime;
91 if (loi->loi_lvb.lvb_ctime > current_ctime)
92 current_ctime = loi->loi_lvb.lvb_ctime;
94 CDEBUG(D_INODE, "MDT ID "DOSTID" on OST[%u]: s=%llu m=%llu"
95 " a=%llu c=%llu b=%llu\n", POSTID(&lsm->lsm_oi),
96 loi->loi_ost_idx, loi->loi_lvb.lvb_size,
97 loi->loi_lvb.lvb_mtime, loi->loi_lvb.lvb_atime,
98 loi->loi_lvb.lvb_ctime, loi->loi_lvb.lvb_blocks);
102 lvb->lvb_size = size;
103 lvb->lvb_blocks = blocks;
104 lvb->lvb_mtime = current_mtime;
105 lvb->lvb_atime = current_atime;
106 lvb->lvb_ctime = current_ctime;