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37 #define DEBUG_SUBSYSTEM S_LOV
39 #include <libcfs/libcfs.h>
41 #include <obd_class.h>
42 #include "lov_internal.h"
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.
49 int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
50 struct ost_lvb *lvb, __u64 *kms_place)
55 obd_time current_mtime = lvb->lvb_mtime;
56 obd_time current_atime = lvb->lvb_atime;
57 obd_time current_ctime = lvb->lvb_ctime;
61 assert_spin_locked(&lsm->lsm_lock);
62 LASSERT(lsm->lsm_lock_owner == current_pid());
64 CDEBUG(D_INODE, "MDT ID "DOSTID" initial value: s="LPU64" m="LPU64
65 " a="LPU64" c="LPU64" b="LPU64"\n", POSTID(&lsm->lsm_oi),
66 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime, lvb->lvb_ctime,
68 for (i = 0; i < lsm->lsm_stripe_count; i++) {
69 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
70 obd_size lov_size, tmpsize;
72 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
73 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
77 tmpsize = loi->loi_kms;
78 lov_size = lov_stripe_size(lsm, tmpsize, i);
82 if (loi->loi_lvb.lvb_size > tmpsize)
83 tmpsize = loi->loi_lvb.lvb_size;
85 lov_size = lov_stripe_size(lsm, tmpsize, i);
88 /* merge blocks, mtime, atime */
89 blocks += loi->loi_lvb.lvb_blocks;
90 if (loi->loi_lvb.lvb_mtime > current_mtime)
91 current_mtime = loi->loi_lvb.lvb_mtime;
92 if (loi->loi_lvb.lvb_atime > current_atime)
93 current_atime = loi->loi_lvb.lvb_atime;
94 if (loi->loi_lvb.lvb_ctime > current_ctime)
95 current_ctime = loi->loi_lvb.lvb_ctime;
97 CDEBUG(D_INODE, "MDT ID "DOSTID" on OST[%u]: s="LPU64" m="LPU64
98 " a="LPU64" c="LPU64" b="LPU64"\n", POSTID(&lsm->lsm_oi),
99 loi->loi_ost_idx, loi->loi_lvb.lvb_size,
100 loi->loi_lvb.lvb_mtime, loi->loi_lvb.lvb_atime,
101 loi->loi_lvb.lvb_ctime, loi->loi_lvb.lvb_blocks);
105 lvb->lvb_size = size;
106 lvb->lvb_blocks = blocks;
107 lvb->lvb_mtime = current_mtime;
108 lvb->lvb_atime = current_atime;
109 lvb->lvb_ctime = current_ctime;
113 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_valid valid,
114 struct lov_stripe_md *lsm, int stripeno, int *set)
116 valid &= src->o_valid;
119 tgt->o_valid &= valid;
120 if (valid & OBD_MD_FLSIZE) {
121 /* this handles sparse files properly */
124 lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
125 if (lov_size > tgt->o_size)
126 tgt->o_size = lov_size;
128 if (valid & OBD_MD_FLBLOCKS)
129 tgt->o_blocks += src->o_blocks;
130 if (valid & OBD_MD_FLBLKSZ)
131 tgt->o_blksize += src->o_blksize;
132 if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
133 tgt->o_ctime = src->o_ctime;
134 if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
135 tgt->o_mtime = src->o_mtime;
136 if (valid & OBD_MD_FLDATAVERSION)
137 tgt->o_data_version += src->o_data_version;
140 if (valid & OBD_MD_FLFLAGS)
141 tgt->o_flags &= src->o_flags;
145 memcpy(tgt, src, sizeof(*tgt));
146 tgt->o_oi = lsm->lsm_oi;
147 tgt->o_valid = valid;
148 if (valid & OBD_MD_FLSIZE)
149 tgt->o_size = lov_stripe_size(lsm, src->o_size,
152 if (valid & OBD_MD_FLFLAGS)
153 tgt->o_flags = src->o_flags;
156 /* data_version needs to be valid on all stripes to be correct! */
157 if (!(valid & OBD_MD_FLDATAVERSION))
158 tgt->o_valid &= ~OBD_MD_FLDATAVERSION;