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wipe_lv: initially open LV in writable mode

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wipe_lv knows it's going to write the device, so it
can open rw from the start.  It was opening readonly,
and then dev_write needed to reopen it readwrite.
This commit is contained in:
David Teigland 2019-04-26 14:49:27 -05:00
parent 8fbaa6d9a5
commit ccd1386070
3 changed files with 14 additions and 1 deletions
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12
lib/label/label.c
View File

@ -1272,6 +1272,18 @@ int label_scan_open_excl(struct device *dev)
return label_scan_open(dev);
}
int label_scan_open_rw(struct device *dev)
{
if (_in_bcache(dev) && !(dev->flags & DEV_BCACHE_WRITE)) {
/* FIXME: avoid tossing out bcache blocks just to replace fd. */
log_debug("Close and reopen rw %s", dev_name(dev));
bcache_invalidate_fd(scan_bcache, dev->bcache_fd);
_scan_dev_close(dev);
}
dev->flags |= DEV_BCACHE_WRITE;
return label_scan_open(dev);
}
bool dev_read_bytes(struct device *dev, uint64_t start, size_t len, void *data)
{
if (!scan_bcache) {

1
lib/label/label.h
View File

@ -115,6 +115,7 @@ void label_scan_confirm(struct device *dev);
int label_scan_setup_bcache(void);
int label_scan_open(struct device *dev);
int label_scan_open_excl(struct device *dev);
int label_scan_open_rw(struct device *dev);
/*
* Wrappers around bcache equivalents.

2
lib/metadata/lv_manip.c
View File

@ -7365,7 +7365,7 @@ int wipe_lv(struct logical_volume *lv, struct wipe_params wp)
return 0;
}
if (!label_scan_open(dev)) {
if (!label_scan_open_rw(dev)) {
log_error("Failed to open %s/%s for wiping and zeroing.", lv->vg->name, lv->name);
goto out;
}