diff options
| -rw-r--r-- | source3/smbd/fileio.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/source3/smbd/fileio.c b/source3/smbd/fileio.c index 9b39bf8fe1..69b8b57642 100644 --- a/source3/smbd/fileio.c +++ b/source3/smbd/fileio.c @@ -509,6 +509,44 @@ nonop=%u allocated=%u active=%u direct=%u perfect=%u readhits=%u\n", write_path = 3; + } else if ( (pos >= wcp->file_size) && + (n == 1) && + (pos < wcp->offset + 2*wcp->alloc_size) && + (wcp->file_size == wcp->offset + wcp->data_size)) { + + /* + +---------------+ + | Cached data | + +---------------+ + + +--------+ + | 1 Byte | + +--------+ + + MS-Office seems to do this a lot to determine if there's enough + space on the filesystem to write a new file. + */ + + SMB_BIG_UINT new_start = wcp->offset + wcp->data_size; + + flush_write_cache(fsp, WRITE_FLUSH); + wcp->offset = new_start; + wcp->data_size = pos - new_start + 1; + memset(wcp->data, '\0', wcp->data_size); + memcpy(wcp->data + wcp->data_size-1, data, 1); + + /* + * Update the file size if changed. + */ + + if (wcp->offset + wcp->data_size > wcp->file_size) { + if (wcp_file_size_change(fsp) == -1) { + return -1; + } + } + + return n; + } else { /* ASCII art..... JRA. |