* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
#include "lov_internal.h"
-/* Merge the lock value block(&lvb) attributes from each of the stripes in a
- * file into a single lvb. It is expected that the caller initializes the
- * current atime, mtime, ctime to avoid regressing a more uptodate time on
- * the local client.
- *
- * If @kms_only is set then we do not consider the recently seen size (rss)
- * when updating the known minimum size (kms). Even when merging RSS, we will
- * take the KMS value if it's larger. This prevents getattr from stomping on
- * dirty cached pages which extend the file size. */
-int lov_merge_lvb(struct obd_export *exp, struct lov_stripe_md *lsm,
- struct ost_lvb *lvb, int kms_only)
+/** Merge the lock value block(&lvb) attributes and KMS from each of the
+ * stripes in a file into a single lvb. It is expected that the caller
+ * initializes the current atime, mtime, ctime to avoid regressing a more
+ * uptodate time on the local client.
+ */
+int lov_merge_lvb_kms(struct lov_stripe_md *lsm,
+ struct ost_lvb *lvb, __u64 *kms_place)
{
__u64 size = 0;
+ __u64 kms = 0;
__u64 blocks = 0;
- __u64 current_mtime = lvb->lvb_mtime;
- __u64 current_atime = lvb->lvb_atime;
- __u64 current_ctime = lvb->lvb_ctime;
+ obd_time current_mtime = lvb->lvb_mtime;
+ obd_time current_atime = lvb->lvb_atime;
+ obd_time current_ctime = lvb->lvb_ctime;
int i;
int rc = 0;
}
tmpsize = loi->loi_kms;
- if (kms_only == 0 && loi->loi_lvb.lvb_size > tmpsize)
+ lov_size = lov_stripe_size(lsm, tmpsize, i);
+ if (lov_size > kms)
+ kms = lov_size;
+
+ if (loi->loi_lvb.lvb_size > tmpsize)
tmpsize = loi->loi_lvb.lvb_size;
lov_size = lov_stripe_size(lsm, tmpsize, i);
size = lov_size;
/* merge blocks, mtime, atime */
blocks += loi->loi_lvb.lvb_blocks;
+ if (loi->loi_lvb.lvb_mtime > current_mtime)
+ current_mtime = loi->loi_lvb.lvb_mtime;
if (loi->loi_lvb.lvb_atime > current_atime)
current_atime = loi->loi_lvb.lvb_atime;
-
- /* mtime is always updated with ctime, but can be set in past.
- As write and utime(2) may happen within 1 second, and utime's
- mtime has a priority over write's one, leave mtime from mds
- for the same ctimes. */
- if (loi->loi_lvb.lvb_ctime > current_ctime) {
+ if (loi->loi_lvb.lvb_ctime > current_ctime)
current_ctime = loi->loi_lvb.lvb_ctime;
- current_mtime = loi->loi_lvb.lvb_mtime;
- }
}
+ *kms_place = kms;
lvb->lvb_size = size;
lvb->lvb_blocks = blocks;
lvb->lvb_mtime = current_mtime;
RETURN(rc);
}
+/** Merge the lock value block(&lvb) attributes from each of the stripes in a
+ * file into a single lvb. It is expected that the caller initializes the
+ * current atime, mtime, ctime to avoid regressing a more uptodate time on
+ * the local client.
+ *
+ * If \a kms_only is set then we do not consider the recently seen size (rss)
+ * when updating the known minimum size (kms). Even when merging RSS, we will
+ * take the KMS value if it's larger. This prevents getattr from stomping on
+ * dirty cached pages which extend the file size. */
+int lov_merge_lvb(struct obd_export *exp,
+ struct lov_stripe_md *lsm, struct ost_lvb *lvb, int kms_only)
+{
+ int rc;
+ __u64 kms;
+
+ ENTRY;
+ rc = lov_merge_lvb_kms(lsm, lvb, &kms);
+ if (kms_only)
+ lvb->lvb_size = kms;
+ CDEBUG(D_INODE, "merged: "LPU64" "LPU64" "LPU64" "LPU64" "LPU64"\n",
+ lvb->lvb_size, lvb->lvb_mtime, lvb->lvb_atime,
+ lvb->lvb_ctime, lvb->lvb_blocks);
+ RETURN(rc);
+}
+
/* Must be called under the lov_stripe_lock() */
int lov_adjust_kms(struct obd_export *exp, struct lov_stripe_md *lsm,
obd_off size, int shrink)
RETURN(0);
}
-void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_flag valid,
+void lov_merge_attrs(struct obdo *tgt, struct obdo *src, obd_valid valid,
struct lov_stripe_md *lsm, int stripeno, int *set)
{
valid &= src->o_valid;
tgt->o_blksize += src->o_blksize;
if (valid & OBD_MD_FLCTIME && tgt->o_ctime < src->o_ctime)
tgt->o_ctime = src->o_ctime;
- /* Only mtime from OSTs are merged here, as they cannot be set
- in past (only MDS's mtime can) do not look at ctime. */
if (valid & OBD_MD_FLMTIME && tgt->o_mtime < src->o_mtime)
tgt->o_mtime = src->o_mtime;
+ if (valid & OBD_MD_FLDATAVERSION)
+ tgt->o_data_version += src->o_data_version;
} else {
memcpy(tgt, src, sizeof(*tgt));
tgt->o_id = lsm->lsm_object_id;
if (valid & OBD_MD_FLSIZE)
tgt->o_size = lov_stripe_size(lsm,src->o_size,stripeno);
- *set = 1;
}
+
+ /* data_version needs to be valid on all stripes to be correct! */
+ if (!(valid & OBD_MD_FLDATAVERSION))
+ tgt->o_valid &= ~OBD_MD_FLDATAVERSION;
+
+ *set += 1;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff