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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, int index,
46 struct ost_lvb *lvb, __u64 *kms_place)
48 struct lov_stripe_md_entry *lse = lsm->lsm_entries[index];
52 s64 current_mtime = lvb->lvb_mtime;
53 s64 current_atime = lvb->lvb_atime;
54 s64 current_ctime = lvb->lvb_ctime;
58 assert_spin_locked(&lsm->lsm_lock);
59 LASSERT(lsm->lsm_lock_owner == current->pid);
61 CDEBUG(D_INODE, "MDT ID "DOSTID" initial value: s=%llu m=%llu"
62 " a=%llu c=%llu b=%llu\n", POSTID(&lsm->lsm_oi),
63 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime, lvb->lvb_ctime,
65 for (i = 0; i < lse->lsme_stripe_count; i++) {
66 struct lov_oinfo *loi = lse->lsme_oinfo[i];
70 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
71 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
75 tmpsize = loi->loi_kms;
76 lov_size = lov_stripe_size(lsm, index, tmpsize, i);
80 if (loi->loi_lvb.lvb_size > tmpsize)
81 tmpsize = loi->loi_lvb.lvb_size;
83 lov_size = lov_stripe_size(lsm, index, tmpsize, i);
86 /* merge blocks, mtime, atime */
87 blocks += loi->loi_lvb.lvb_blocks;
88 if (loi->loi_lvb.lvb_mtime > current_mtime)
89 current_mtime = loi->loi_lvb.lvb_mtime;
90 if (loi->loi_lvb.lvb_atime > current_atime)
91 current_atime = loi->loi_lvb.lvb_atime;
92 if (loi->loi_lvb.lvb_ctime > current_ctime)
93 current_ctime = loi->loi_lvb.lvb_ctime;
95 CDEBUG(D_INODE, "MDT ID "DOSTID" on OST[%u]: s=%llu m=%llu"
96 " a=%llu c=%llu b=%llu\n", POSTID(&lsm->lsm_oi),
97 loi->loi_ost_idx, loi->loi_lvb.lvb_size,
98 loi->loi_lvb.lvb_mtime, loi->loi_lvb.lvb_atime,
99 loi->loi_lvb.lvb_ctime, loi->loi_lvb.lvb_blocks);
103 lvb->lvb_size = size;
104 lvb->lvb_blocks = blocks;
105 lvb->lvb_mtime = current_mtime;
106 lvb->lvb_atime = current_atime;
107 lvb->lvb_ctime = current_ctime;