Discard should happen only when everything has been validated, just
before we start writing to the device. If it happens earlier, it is
possible that mkfs will abort, but managed to already wipe data. This
patch moves the discard to the latest possible moment.
Signed-off-by: Jan Tulak <jtulak@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>
static void
open_devices(
struct mkfs_params *cfg,
static void
open_devices(
struct mkfs_params *cfg,
- struct libxfs_xinit *xi,
- bool discard)
+ struct libxfs_xinit *xi)
xi->dsize &= sector_mask;
xi->rtsize &= sector_mask;
xi->logBBsize &= (uint64_t)-1 << (max(cfg->lsectorlog, 10) - BBSHIFT);
xi->dsize &= sector_mask;
xi->rtsize &= sector_mask;
xi->logBBsize &= (uint64_t)-1 << (max(cfg->lsectorlog, 10) - BBSHIFT);
-
- if (!discard)
- return;
+static void
+discard_devices(
+ struct libxfs_xinit *xi)
+{
+ /*
+ * This function has to be called after libxfs has been initialized.
+ */
if (!xi->disfile)
discard_blocks(xi->ddev, xi->dsize);
if (!xi->disfile)
discard_blocks(xi->ddev, xi->dsize);
/*
* Open and validate the device configurations
*/
/*
* Open and validate the device configurations
*/
- open_devices(&cfg, &xi, (discard && !dry_run));
+ open_devices(&cfg, &xi);
validate_datadev(&cfg, &cli);
validate_logdev(&cfg, &cli, &logfile);
validate_rtdev(&cfg, &cli, &rtfile);
validate_datadev(&cfg, &cli);
validate_logdev(&cfg, &cli, &logfile);
validate_rtdev(&cfg, &cli, &rtfile);
+ /*
+ * All values have been validated, discard the old device layout.
+ */
+ if (discard && !dry_run)
+ discard_devices(&xi);
+
/*
* we need the libxfs buffer cache from here on in.
*/
/*
* we need the libxfs buffer cache from here on in.
*/