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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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32 * Lustre is a trademark of Sun Microsystems, Inc.
35 #define DEBUG_SUBSYSTEM S_LOV
38 #include <libcfs/libcfs.h>
40 #include <liblustre.h>
43 #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 LASSERT_SPIN_LOCKED(&lsm->lsm_lock);
67 LASSERT(lsm->lsm_lock_owner == cfs_curproc_pid());
70 CDEBUG(D_INODE, "MDT FID "DFID" initial value: s="LPU64" m="LPU64
71 " a="LPU64" c="LPU64" b="LPU64"\n",
72 lsm->lsm_object_seq, (__u32)lsm->lsm_object_id,
73 (__u32)(lsm->lsm_object_id >> 32), lvb->lvb_size,
74 lvb->lvb_mtime, lvb->lvb_atime, lvb->lvb_ctime, lvb->lvb_blocks);
75 for (i = 0; i < lsm->lsm_stripe_count; i++) {
76 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
77 obd_size lov_size, tmpsize;
79 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
80 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
84 tmpsize = loi->loi_kms;
85 lov_size = lov_stripe_size(lsm, tmpsize, i);
89 if (loi->loi_lvb.lvb_size > tmpsize)
90 tmpsize = loi->loi_lvb.lvb_size;
92 lov_size = lov_stripe_size(lsm, tmpsize, i);
95 /* merge blocks, mtime, atime */
96 blocks += loi->loi_lvb.lvb_blocks;
97 if (loi->loi_lvb.lvb_mtime > current_mtime)
98 current_mtime = loi->loi_lvb.lvb_mtime;
99 if (loi->loi_lvb.lvb_atime > current_atime)
100 current_atime = loi->loi_lvb.lvb_atime;
101 if (loi->loi_lvb.lvb_ctime > current_ctime)
102 current_ctime = loi->loi_lvb.lvb_ctime;
103 CDEBUG(D_INODE, "MDT FID "DFID" on OST[%u]: s="LPU64" m="LPU64
104 " a="LPU64" c="LPU64" b="LPU64"\n",
105 lsm->lsm_object_seq, (__u32)lsm->lsm_object_id,
106 (__u32)(lsm->lsm_object_id >> 32), loi->loi_ost_idx,
107 loi->loi_lvb.lvb_size, loi->loi_lvb.lvb_mtime,
108 loi->loi_lvb.lvb_atime, loi->loi_lvb.lvb_ctime,
109 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);
142 CDEBUG(D_INODE, "merged for FID "DFID" s="LPU64" m="LPU64" a="LPU64
143 " c="LPU64" b="LPU64"\n",
144 lsm->lsm_object_seq, (__u32)lsm->lsm_object_id,
145 (__u32)(lsm->lsm_object_id >> 32), lvb->lvb_size, lvb->lvb_mtime,
146 lvb->lvb_atime, lvb->lvb_ctime, lvb->lvb_blocks);
150 /* Must be called under the lov_stripe_lock() */
151 int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
152 obd_off size, int shrink)
154 struct lov_oinfo *loi;
159 LASSERT_SPIN_LOCKED(&lsm->lsm_lock);
161 LASSERT(lsm->lsm_lock_owner == cfs_curproc_pid());
165 for (; stripe < lsm->lsm_stripe_count; stripe++) {
166 struct lov_oinfo *loi = lsm->lsm_oinfo[stripe];
167 kms = lov_size_to_stripe(lsm, size, stripe);
169 "stripe %d KMS %sing "LPU64"->"LPU64"\n",
170 stripe, kms > loi->loi_kms ? "increas":"shrink",
172 loi_kms_set(loi, loi->loi_lvb.lvb_size = kms);
178 stripe = lov_stripe_number(lsm, size - 1);
179 kms = lov_size_to_stripe(lsm, size, stripe);
180 loi = lsm->lsm_oinfo[stripe];
182 CDEBUG(D_INODE, "stripe %d KMS %sincreasing "LPU64"->"LPU64"\n",
183 stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms);
184 if (kms > loi->loi_kms)
185 loi_kms_set(loi, kms);
190 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_valid valid,
191 struct lov_stripe_md *lsm, int stripeno, int *set)
193 valid &= src->o_valid;
196 if (valid & OBD_MD_FLSIZE) {
197 /* this handles sparse files properly */
200 lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
201 if (lov_size > tgt->o_size)
202 tgt->o_size = lov_size;
204 if (valid & OBD_MD_FLBLOCKS)
205 tgt->o_blocks += src->o_blocks;
206 if (valid & OBD_MD_FLBLKSZ)
207 tgt->o_blksize += src->o_blksize;
208 if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
209 tgt->o_ctime = src->o_ctime;
210 if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
211 tgt->o_mtime = src->o_mtime;
212 if (valid & OBD_MD_FLDATAVERSION)
213 tgt->o_data_version += src->o_data_version;
215 memcpy(tgt, src, sizeof(*tgt));
216 tgt->o_id = lsm->lsm_object_id;
217 if (valid & OBD_MD_FLSIZE)
218 tgt->o_size = lov_stripe_size(lsm,src->o_size,stripeno);
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;