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Check we read off the compelte event from inotify

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The kernel may return a short read, so we must use read_data() to make sure we
read off the full buffer. If somethign bad happens we also need to kill the
inotify watch because the filedescriptor will return out of sync structures if
we read only part of the data.
This commit is contained in:
Simo Sorce 2009-09-05 10:18:12 -04:00
parent bc081cf0cc
commit affed02ef6
1 changed files with 8 additions and 2 deletions
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10
source3/smbd/notify_inotify.c
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@ -232,6 +232,7 @@ static void inotify_handler(struct event_context *ev, struct fd_event *fde,
int bufsize = 0;
struct inotify_event *e0, *e;
uint32_t prev_cookie=0;
NTSTATUS status;
/*
we must use FIONREAD as we cannot predict the length of the
@ -248,9 +249,14 @@ static void inotify_handler(struct event_context *ev, struct fd_event *fde,
e0 = e = (struct inotify_event *)TALLOC_SIZE(in, bufsize);
if (e == NULL) return;
if (sys_read(in->fd, e0, bufsize) != bufsize) {
DEBUG(0,("Failed to read all inotify data\n"));
status = read_data(in->fd, (char *)e0, bufsize);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Failed to read all inotify data - %s\n",
nt_errstr(status)));
talloc_free(e0);
/* the inotify fd will now be out of sync,
* can't keep reading data off it */
TALLOC_FREE(fde);
return;
}