diff options
Diffstat (limited to 'doc/design/assistant/inotify.mdwn')
| -rw-r--r-- | doc/design/assistant/inotify.mdwn | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/doc/design/assistant/inotify.mdwn b/doc/design/assistant/inotify.mdwn index 079941f59..28b3130e3 100644 --- a/doc/design/assistant/inotify.mdwn +++ b/doc/design/assistant/inotify.mdwn @@ -67,10 +67,18 @@ Many races need to be dealt with by this code. Here are some of them. **Currently unfixed**; This changes content in the annex, and fsck will later catch the inconsistency. - Possible fixes: Somehow track or detect if a file is open for write - by any processes. Or, when possible, making a copy on write copy - before adding the file would avoid this. Or, as a last resort, make - an expensive copy of the file and add that. + Possible fixes: + + * Somehow track or detect if a file is open for write by any processes. + * Or, when possible, making a copy on write copy before adding the file + would avoid this. + * Or, as a last resort, make an expensive copy of the file and add that. + * Tracking file opens and closes with inotify could tell if any other + processes have the file open. But there are problems.. It doesn't + seem to differentiate between files opened for read and for write. + And there would still be a race after the last close and before it's + injected into the annex, where it could be opened for write again. + Would need to detect that and undo the annex injection or something. * File is added and then replaced with another file before the annex add makes its symlink. |