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-rw-r--r--Makefile4
-rw-r--r--read-cache.c18
2 files changed, 17 insertions, 5 deletions
diff --git a/Makefile b/Makefile
index 3dec8b8..04f7d78 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,9 @@
# 1461501637330902918203684832716283019655932542976 hashes do not give you
# enough guarantees about no collisions between objects ever hapenning.
#
-# -DNSEC if you want git to care about sub-second file mtimes and ctimes.
+# -DUSE_NSEC if you want git to care about sub-second file mtimes and ctimes.
+# -DUSE_STDEV if you want git to care about st_dev changing
+#
# Note that you need some new glibc (at least >2.2.4) for this, and it will
# BREAK YOUR LOCAL DIFFS! show-diff and anything using it will likely randomly
# break unless your underlying filesystem supports those sub-second times
diff --git a/read-cache.c b/read-cache.c
index 24ebe38..34c040a 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -17,7 +17,7 @@ void fill_stat_cache_info(struct cache_entry *ce, struct stat *st)
{
ce->ce_ctime.sec = htonl(st->st_ctime);
ce->ce_mtime.sec = htonl(st->st_mtime);
-#ifdef NSEC
+#ifdef USE_NSEC
ce->ce_ctime.nsec = htonl(st->st_ctim.tv_nsec);
ce->ce_mtime.nsec = htonl(st->st_mtim.tv_nsec);
#endif
@@ -50,7 +50,7 @@ int ce_match_stat(struct cache_entry *ce, struct stat *st)
if (ce->ce_ctime.sec != htonl(st->st_ctime))
changed |= CTIME_CHANGED;
-#ifdef NSEC
+#ifdef USE_NSEC
/*
* nsec seems unreliable - not all filesystems support it, so
* as long as it is in the inode cache you get right nsec
@@ -65,9 +65,19 @@ int ce_match_stat(struct cache_entry *ce, struct stat *st)
if (ce->ce_uid != htonl(st->st_uid) ||
ce->ce_gid != htonl(st->st_gid))
changed |= OWNER_CHANGED;
- if (ce->ce_dev != htonl(st->st_dev) ||
- ce->ce_ino != htonl(st->st_ino))
+ if (ce->ce_ino != htonl(st->st_ino))
changed |= INODE_CHANGED;
+
+#ifdef USE_STDEV
+ /*
+ * st_dev breaks on network filesystems where different
+ * clients will have different views of what "device"
+ * the filesystem is on
+ */
+ if (ce->ce_dev != htonl(st->st_dev))
+ changed |= INODE_CHANGED;
+#endif
+
if (ce->ce_size != htonl(st->st_size))
changed |= DATA_CHANGED;
return changed;