svn commit: r350183 - head/sbin/swapon
Doug Moore
dougm at FreeBSD.org
Sat Jul 20 20:47:09 UTC 2019
Author: dougm
Date: Sat Jul 20 20:47:07 2019
New Revision: 350183
URL: https://svnweb.freebsd.org/changeset/base/350183
Log:
In trimming on startup, invoke swapon before closing the fd used for
trimming so that a geli device isn't detached before swapon is
invoked.
Submitted by: sigsys_gmail.com
Discussed with: alc
Approved by: markj (mentor)
Differential Revision: https://reviews.freebsd.org/D21006
Modified:
head/sbin/swapon/swapon.c
Modified: head/sbin/swapon/swapon.c
==============================================================================
--- head/sbin/swapon/swapon.c Sat Jul 20 18:25:41 2019 (r350182)
+++ head/sbin/swapon/swapon.c Sat Jul 20 20:47:07 2019 (r350183)
@@ -739,12 +739,12 @@ run_cmd(int *ofd, const char *cmdline, ...)
return (WEXITSTATUS(status));
}
-static void
-swap_trim(const char *name)
+static int
+swapon_trim(const char *name)
{
struct stat sb;
off_t ioarg[2], sz;
- int fd;
+ int error, fd;
fd = open(name, O_WRONLY);
if (fd < 0)
@@ -762,7 +762,16 @@ swap_trim(const char *name)
ioarg[1] = sz;
if (ioctl(fd, DIOCGDELETE, ioarg) != 0)
warn("ioctl(DIOCGDELETE)");
+
+ /*
+ * swapon is invoked after trimming, so that the trimming doesn't happen
+ * after the device is in use for swapping, but before the fd is closed,
+ * for the benefit of geli, which could otherwise detach the device,
+ * before swapon, on close.
+ */
+ error = swapon(name);
close(fd);
+ return (error);
}
static const char *
@@ -770,11 +779,9 @@ swap_on_off_sfile(const char *name, int doingall)
{
int error;
- if (which_prog == SWAPON) {
- if (Eflag)
- swap_trim(name);
- error = swapon(name);
- } else /* SWAPOFF */
+ if (which_prog == SWAPON)
+ error = Eflag ? swapon_trim(name) : swapon(name);
+ else /* SWAPOFF */
error = swapoff(name);
if (error == -1) {
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