From: Eric DeCosta <edecosta@xxxxxxxxxxxxx>
Though perhaps not common, there are use cases where users have large,
network-mounted repos. Having the ability to run fsmonitor against
network paths would benefit those users.
Most modern Samba-based filers have the necessary support to enable
fsmonitor on network-mounted repos. As a first step towards enabling
fsmonitor to work against network-mounted repos, introduce a
configuration option, 'fsmonitor.allowRemote'. Setting this option to
true will override the default behavior (erroring-out) when a
network-mounted repo is detected by fsmonitor.
Signed-off-by: Eric DeCosta <edecosta@xxxxxxxxxxxxx>
---
compat/fsmonitor/fsm-settings-win32.c | 68 +++++++++++++++++++++++++++
1 file changed, 68 insertions(+)
diff --git a/compat/fsmonitor/fsm-settings-win32.c b/compat/fsmonitor/fsm-settings-win32.c
index 907655720bb..e5ec5b0a9f7 100644
--- a/compat/fsmonitor/fsm-settings-win32.c
+++ b/compat/fsmonitor/fsm-settings-win32.c
@@ -24,6 +24,59 @@ static enum fsmonitor_reason check_vfs4git(struct repository *r)
return FSMONITOR_REASON_OK;
}
+/*
+ * Check if monitoring remote working directories is allowed.
+ *
+ * By default, monitoring remote working directories is
+ * disabled. Users may override this behavior in enviroments where
+ * they have proper support.
+ */
+static int check_config_allowremote(struct repository *r)
+{
+ int allow;
+
+ if (!repo_config_get_bool(r, "fsmonitor.allowremote", &allow))
+ return allow;
+
+ return -1; /* fsmonitor.allowremote not set */
+}
+
+/*
+ * Check remote working directory protocol.
+ *
+ * Error if client machine cannot get remote protocol information.
+ */
+static int check_remote_protocol(wchar_t *wpath)
+{
+ HANDLE h;
+ FILE_REMOTE_PROTOCOL_INFO proto_info;
+
+ h = CreateFileW(wpath, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
+ FILE_FLAG_BACKUP_SEMANTICS, NULL);
+
+ if (h == INVALID_HANDLE_VALUE) {
+ error(_("[GLE %ld] unable to open for read '%ls'"),
+ GetLastError(), wpath);
+ return -1;
+ }
+
+ if (!GetFileInformationByHandleEx(h, FileRemoteProtocolInfo,
+ &proto_info, sizeof(proto_info))) {
+ error(_("[GLE %ld] unable to get protocol information for '%ls'"),
+ GetLastError(), wpath);
+ CloseHandle(h);
+ return -1;
+ }
+
+ CloseHandle(h);
+
+ trace_printf_key(&trace_fsmonitor,
+ "check_remote_protocol('%ls') remote protocol %#8.8lx",
+ wpath, proto_info.Protocol);
+
+ return 0;
+}
+
/*
* Remote working directories are problematic for FSMonitor.
*
@@ -76,6 +129,7 @@ static enum fsmonitor_reason check_vfs4git(struct repository *r)
*/
static enum fsmonitor_reason check_remote(struct repository *r)
{
+ int ret;
wchar_t wpath[MAX_PATH];
wchar_t wfullpath[MAX_PATH];
size_t wlen;
@@ -115,6 +169,20 @@ static enum fsmonitor_reason check_remote(struct repository *r)
trace_printf_key(&trace_fsmonitor,
"check_remote('%s') true",
r->worktree);
+
+ ret = check_remote_protocol(wfullpath);
+ if (ret < 0)
+ return FSMONITOR_REASON_ERROR;
+
+ switch (check_config_allowremote(r)) {
+ case 0: /* config overrides and disables */
+ return FSMONITOR_REASON_REMOTE;
+ case 1: /* config overrides and enables */
+ return FSMONITOR_REASON_OK;
+ default:
+ break; /* config has no opinion */
+ }
+
return FSMONITOR_REASON_REMOTE;
}
--
gitgitgadget
