Similar to "ndctl write-labels", after "ndctl sanitize-dimm --overwrite" the kernel may contain a cached copy of the label area that has been invalidated by the overwrite. Toggle the enabled state of the dimm-device to trigger the kernel to release the cached copy.
Cc: Jeff Moyer <[email protected]> Cc: Dave Jiang <[email protected]> Link: https://lore.kernel.org/all/165118817010.1772793.5101398830527716084.st...@dwillia2-desk3.amr.corp.intel.com/ Signed-off-by: Dan Williams <[email protected]> --- ndctl/dimm.c | 34 ++++++++++++++++++++++------------ 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/ndctl/dimm.c b/ndctl/dimm.c index d9718a33b22f..ac7c5270e971 100644 --- a/ndctl/dimm.c +++ b/ndctl/dimm.c @@ -354,6 +354,23 @@ static int rw_bin(FILE *f, struct ndctl_cmd *cmd, ssize_t size, return 0; } +static int revalidate_labels(struct ndctl_dimm *dimm) +{ + int rc; + + /* + * If the dimm is already disabled the kernel is not holding a cached + * copy of the label space. + */ + if (!ndctl_dimm_is_enabled(dimm)) + return 0; + + rc = ndctl_dimm_disable(dimm); + if (rc) + return rc; + return ndctl_dimm_enable(dimm); +} + static int action_write(struct ndctl_dimm *dimm, struct action_context *actx) { struct ndctl_cmd *cmd_read, *cmd_write; @@ -377,18 +394,10 @@ static int action_write(struct ndctl_dimm *dimm, struct action_context *actx) size = ndctl_cmd_cfg_read_get_size(cmd_read); rc = rw_bin(actx->f_in, cmd_write, size, param.offset, WRITE); - - /* - * If the dimm is already disabled the kernel is not holding a cached - * copy of the label space. - */ - if (!ndctl_dimm_is_enabled(dimm)) - goto out; - - rc = ndctl_dimm_disable(dimm); if (rc) goto out; - rc = ndctl_dimm_enable(dimm); + + rc = revalidate_labels(dimm); out: ndctl_cmd_unref(cmd_read); @@ -1043,7 +1052,7 @@ static int action_security_freeze(struct ndctl_dimm *dimm, static int action_sanitize_dimm(struct ndctl_dimm *dimm, struct action_context *actx) { - int rc; + int rc = 0; enum ndctl_key_type key_type; if (ndctl_dimm_get_security(dimm) < 0) { @@ -1085,9 +1094,10 @@ static int action_sanitize_dimm(struct ndctl_dimm *dimm, rc = ndctl_dimm_overwrite_key(dimm); if (rc < 0) return rc; + rc = revalidate_labels(dimm); } - return 0; + return rc; } static int action_wait_overwrite(struct ndctl_dimm *dimm,
