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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 for (i = 0; i < lsm->lsm_stripe_count; i++) {
71 struct lov_oinfo *loi = lsm->lsm_oinfo[i];
72 obd_size lov_size, tmpsize;
74 if (OST_LVB_IS_ERR(loi->loi_lvb.lvb_blocks)) {
75 rc = OST_LVB_GET_ERR(loi->loi_lvb.lvb_blocks);
79 tmpsize = loi->loi_kms;
80 lov_size = lov_stripe_size(lsm, tmpsize, i);
84 if (loi->loi_lvb.lvb_size > tmpsize)
85 tmpsize = loi->loi_lvb.lvb_size;
87 lov_size = lov_stripe_size(lsm, tmpsize, i);
90 /* merge blocks, mtime, atime */
91 blocks += loi->loi_lvb.lvb_blocks;
92 if (loi->loi_lvb.lvb_mtime > current_mtime)
93 current_mtime = loi->loi_lvb.lvb_mtime;
94 if (loi->loi_lvb.lvb_atime > current_atime)
95 current_atime = loi->loi_lvb.lvb_atime;
96 if (loi->loi_lvb.lvb_ctime > current_ctime)
97 current_ctime = loi->loi_lvb.lvb_ctime;
101 lvb->lvb_size = size;
102 lvb->lvb_blocks = blocks;
103 lvb->lvb_mtime = current_mtime;
104 lvb->lvb_atime = current_atime;
105 lvb->lvb_ctime = current_ctime;
109 /** Merge the lock value block(&lvb) attributes from each of the stripes in a
110 * file into a single lvb. It is expected that the caller initializes the
111 * current atime, mtime, ctime to avoid regressing a more uptodate time on
114 * If \a kms_only is set then we do not consider the recently seen size (rss)
115 * when updating the known minimum size (kms). Even when merging RSS, we will
116 * take the KMS value if it's larger. This prevents getattr from stomping on
117 * dirty cached pages which extend the file size. */
118 int lov_merge_lvb(struct obd_export *exp,
119 struct lov_stripe_md *lsm, struct ost_lvb *lvb, int kms_only)
125 rc = lov_merge_lvb_kms(lsm, lvb, &kms);
128 CDEBUG(D_INODE, "merged: "LPU64" "LPU64" "LPU64" "LPU64" "LPU64"\n",
129 lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
130 lvb->lvb_ctime, lvb->lvb_blocks);
134 /* Must be called under the lov_stripe_lock() */
135 int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
136 obd_off size, int shrink)
138 struct lov_oinfo *loi;
143 LASSERT_SPIN_LOCKED(&lsm->lsm_lock);
145 LASSERT(lsm->lsm_lock_owner == cfs_curproc_pid());
149 for (; stripe < lsm->lsm_stripe_count; stripe++) {
150 struct lov_oinfo *loi = lsm->lsm_oinfo[stripe];
151 kms = lov_size_to_stripe(lsm, size, stripe);
153 "stripe %d KMS %sing "LPU64"->"LPU64"\n",
154 stripe, kms > loi->loi_kms ? "increas":"shrink",
156 loi_kms_set(loi, loi->loi_lvb.lvb_size = kms);
162 stripe = lov_stripe_number(lsm, size - 1);
163 kms = lov_size_to_stripe(lsm, size, stripe);
164 loi = lsm->lsm_oinfo[stripe];
166 CDEBUG(D_INODE, "stripe %d KMS %sincreasing "LPU64"->"LPU64"\n",
167 stripe, kms > loi->loi_kms ? "" : "not ", loi->loi_kms, kms);
168 if (kms > loi->loi_kms)
169 loi_kms_set(loi, kms);
174 void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_valid valid,
175 struct lov_stripe_md *lsm, int stripeno, int *set)
177 valid &= src->o_valid;
180 if (valid & OBD_MD_FLSIZE) {
181 /* this handles sparse files properly */
184 lov_size = lov_stripe_size(lsm, src->o_size, stripeno);
185 if (lov_size > tgt->o_size)
186 tgt->o_size = lov_size;
188 if (valid & OBD_MD_FLBLOCKS)
189 tgt->o_blocks += src->o_blocks;
190 if (valid & OBD_MD_FLBLKSZ)
191 tgt->o_blksize += src->o_blksize;
192 if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
193 tgt->o_ctime = src->o_ctime;
194 if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
195 tgt->o_mtime = src->o_mtime;
196 if (valid & OBD_MD_FLDATAVERSION)
197 tgt->o_data_version += src->o_data_version;
199 memcpy(tgt, src, sizeof(*tgt));
200 tgt->o_id = lsm->lsm_object_id;
201 if (valid & OBD_MD_FLSIZE)
202 tgt->o_size = lov_stripe_size(lsm,src->o_size,stripeno);
205 /* data_version needs to be valid on all stripes to be correct! */
206 if (!(valid & OBD_MD_FLDATAVERSION))
207 tgt->o_valid &= ~OBD_MD_FLDATAVERSION;