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-rw-r--r--source3/smbd/fileio.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/source3/smbd/fileio.c b/source3/smbd/fileio.c
index 89f05092b4..a29336d3a2 100644
--- a/source3/smbd/fileio.c
+++ b/source3/smbd/fileio.c
@@ -440,6 +440,19 @@ len = %u\n",fsp->fd, (double)pos, (unsigned int)n, (double)wcp->offset, (unsigne
} else {
ssize_t ret = real_write_file(fsp, data, pos, n);
+ /*
+ * If the write overlaps the entire cache, then
+ * discard the current contents of the cache.
+ * Fix from Rasmus Borup Hansen rbh@math.ku.dk.
+ */
+
+ if ((pos <= wcp->offset) &&
+ (pos + n >= wcp->offset + wcp->data_size) ) {
+ DEBUG(9,("write_file: discarding overwritten write \
+cache: fd = %d, off=%.0f, size=%u\n", fsp->fd, (double)wcp->offset, (unsigned int)wcp->data_size ));
+ wcp->data_size = 0;
+ }
+
DO_PROFILE_INC(writecache_direct_writes);
if (ret == -1)
return ret;