[PATCH 6/8] imsm: Update-subarray for write-intent bitmap
From: Jakub Radtke <hidden>
Date: 2021-01-15 13:29:34
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Jakub Radtke <redacted> The patch updates the current bitmap functionality to handle adding the bitmap on existing volumes. Change-Id: I75c4a2a450858204457f45b4daeecfd807c83834 Signed-off-by: Jakub Radtke <redacted> --- super-intel.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-)
diff --git a/super-intel.c b/super-intel.c
index eb5d39b9..0f3bbdf2 100644
--- a/super-intel.c
+++ b/super-intel.c@@ -7783,6 +7783,19 @@ static int kill_subarray_imsm(struct supertype *st, char *subarray_id) return 0; } +static int get_rwh_policy_from_update(char *update) +{ + if (strcmp(update, "ppl") == 0) + return RWH_MULTIPLE_DISTRIBUTED; + else if (strcmp(update, "no-ppl") == 0) + return RWH_MULTIPLE_OFF; + else if (strcmp(update, "bitmap") == 0) + return RWH_BITMAP; + else if (strcmp(update, "no-bitmap") == 0) + return RWH_OFF; + return -1; +} + static int update_subarray_imsm(struct supertype *st, char *subarray, char *update, struct mddev_ident *ident) {
@@ -7829,8 +7842,7 @@ static int update_subarray_imsm(struct supertype *st, char *subarray, } super->updates_pending++; } - } else if (strcmp(update, "ppl") == 0 || - strcmp(update, "no-ppl") == 0) { + } else if (get_rwh_policy_from_update(update) != -1) { int new_policy; char *ep; int vol = strtoul(subarray, &ep, 10);
@@ -7838,10 +7850,7 @@ static int update_subarray_imsm(struct supertype *st, char *subarray, if (*ep != '\0' || vol >= super->anchor->num_raid_devs) return 2; - if (strcmp(update, "ppl") == 0) - new_policy = RWH_MULTIPLE_DISTRIBUTED; - else - new_policy = RWH_MULTIPLE_OFF; + new_policy = get_rwh_policy_from_update(update); if (st->update_tail) { struct imsm_update_rwh_policy *u = xmalloc(sizeof(*u));
@@ -7857,6 +7866,8 @@ static int update_subarray_imsm(struct supertype *st, char *subarray, dev->rwh_policy = new_policy; super->updates_pending++; } + if (new_policy == RWH_BITMAP) + return write_init_bitmap_imsm_vol(st, vol); } else return 2;
--
2.26.2