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mdadm
0029-Add-ppl-and-no-ppl-options-for-update.patch
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File 0029-Add-ppl-and-no-ppl-options-for-update.patch of Package mdadm
From e6e9dd3f1b255f9921ebc023c1e5b65601a637e2 Mon Sep 17 00:00:00 2001 From: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Date: Wed, 29 Mar 2017 11:54:19 +0200 Subject: [PATCH] Add 'ppl' and 'no-ppl' options for --update= This can be used with --assemble for super1 and with --update-subarray for imsm to enable or disable PPL in the metadata. Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com> --- Assemble.c | 6 ++++++ mdadm.8.in | 27 ++++++++++++++++++++++++--- mdadm.c | 6 +++++- super-intel.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ super1.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 139 insertions(+), 4 deletions(-) diff --git a/Assemble.c b/Assemble.c index c098420..6a6a56b 100644 --- a/Assemble.c +++ b/Assemble.c @@ -602,6 +602,12 @@ static int load_devices(struct devs *devices, char *devmap, if (strcmp(c->update, "uuid") == 0 && !ident->uuid_set) random_uuid((__u8 *)ident->uuid); + if (strcmp(c->update, "ppl") == 0 && + ident->bitmap_fd >= 0) { + pr_err("PPL is not compatible with bitmap\n"); + return -1; + } + dfd = dev_open(devname, tmpdev->disposition == 'I' ? O_RDWR : (O_RDWR|O_EXCL)); diff --git a/mdadm.8.in b/mdadm.8.in index cad5db5..1178ed9 100644 --- a/mdadm.8.in +++ b/mdadm.8.in @@ -1176,6 +1176,8 @@ argument given to this flag can be one of .BR no\-bitmap , .BR bbl , .BR no\-bbl , +.BR ppl , +.BR no\-ppl , .BR metadata , or .BR super\-minor . @@ -1316,6 +1318,16 @@ option will cause any reservation of space for a bad block list to be removed. If the bad block list contains entries, this will fail, as removing the list could cause data corruption. +The +.B ppl +option will enable PPL for a RAID5 array and reserve space for PPL on each +device. There must be enough free space between the data and superblock and a +write-intent bitmap or journal must not be used. + +The +.B no\-ppl +option will disable PPL in the superblock. + .TP .BR \-\-freeze\-reshape Option is intended to be used in start-up scripts during initrd boot phase. @@ -2327,9 +2339,11 @@ superblock field in the subarray. Similar to updating an array in .B \-U or .B \-\-update= -option. Currently only -.B name -is supported. +option. The supported options are +.BR name , +.B ppl +and +.BR no\-ppl . The .B name @@ -2340,6 +2354,13 @@ re\-assembled. If updating would change the UUID of an active subarray this operation is blocked, and the command will end in an error. +The +.B ppl +and +.B no\-ppl +options enable and disable PPL in the metadata. Currently supported only for +IMSM subarrays. + .TP .B \-\-examine The device should be a component of an md array. diff --git a/mdadm.c b/mdadm.c index d4e8286..6edf3ab 100644 --- a/mdadm.c +++ b/mdadm.c @@ -769,6 +769,10 @@ int main(int argc, char *argv[]) continue; if (strcmp(c.update, "force-no-bbl") == 0) continue; + if (strcmp(c.update, "ppl") == 0) + continue; + if (strcmp(c.update, "no-ppl") == 0) + continue; if (strcmp(c.update, "metadata") == 0) continue; if (strcmp(c.update, "revert-reshape") == 0) @@ -802,7 +806,7 @@ int main(int argc, char *argv[]) " 'sparc2.2', 'super-minor', 'uuid', 'name', 'nodes', 'resync',\n" " 'summaries', 'homehost', 'home-cluster', 'byteorder', 'devicesize',\n" " 'no-bitmap', 'metadata', 'revert-reshape'\n" - " 'bbl', 'no-bbl', 'force-no-bbl'\n" + " 'bbl', 'no-bbl', 'force-no-bbl', 'ppl', 'no-ppl'\n" ); exit(outf == stdout ? 0 : 2); diff --git a/super-intel.c b/super-intel.c index 87fec8b..785488a 100644 --- a/super-intel.c +++ b/super-intel.c @@ -451,6 +451,7 @@ enum imsm_update_type { update_general_migration_checkpoint, update_size_change, update_prealloc_badblocks_mem, + update_rwh_policy, }; struct imsm_update_activate_spare { @@ -543,6 +544,12 @@ struct imsm_update_prealloc_bb_mem { enum imsm_update_type type; }; +struct imsm_update_rwh_policy { + enum imsm_update_type type; + int new_policy; + int dev_idx; +}; + static const char *_sys_dev_type[] = { [SYS_DEV_UNKNOWN] = "Unknown", [SYS_DEV_SAS] = "SAS", @@ -7373,6 +7380,34 @@ static int update_subarray_imsm(struct supertype *st, char *subarray, } super->updates_pending++; } + } else if (strcmp(update, "ppl") == 0 || + strcmp(update, "no-ppl") == 0) { + int new_policy; + char *ep; + int vol = strtoul(subarray, &ep, 10); + + if (*ep != '\0' || vol >= super->anchor->num_raid_devs) + return 2; + + if (strcmp(update, "ppl") == 0) + new_policy = RWH_DISTRIBUTED; + else + new_policy = RWH_OFF; + + if (st->update_tail) { + struct imsm_update_rwh_policy *u = xmalloc(sizeof(*u)); + + u->type = update_rwh_policy; + u->dev_idx = vol; + u->new_policy = new_policy; + append_metadata_update(st, u, sizeof(*u)); + } else { + struct imsm_dev *dev; + + dev = get_imsm_dev(super, vol); + dev->rwh_policy = new_policy; + super->updates_pending++; + } } else return 2; @@ -9599,6 +9634,21 @@ static void imsm_process_update(struct supertype *st, } case update_prealloc_badblocks_mem: break; + case update_rwh_policy: { + struct imsm_update_rwh_policy *u = (void *)update->buf; + int target = u->dev_idx; + struct imsm_dev *dev = get_imsm_dev(super, target); + if (!dev) { + dprintf("could not find subarray-%d\n", target); + break; + } + + if (dev->rwh_policy != u->new_policy) { + dev->rwh_policy = u->new_policy; + super->updates_pending++; + } + break; + } default: pr_err("error: unsuported process update type:(type: %d)\n", type); } @@ -9844,6 +9894,11 @@ static int imsm_prepare_update(struct supertype *st, super->extra_space += sizeof(struct bbm_log) - get_imsm_bbm_log_size(super->bbm_log); break; + case update_rwh_policy: { + if (update->len < (int)sizeof(struct imsm_update_rwh_policy)) + return 0; + break; + } default: return 0; } diff --git a/super1.c b/super1.c index 409b6c3..e76f777 100644 --- a/super1.c +++ b/super1.c @@ -1325,6 +1325,55 @@ static int update_super1(struct supertype *st, struct mdinfo *info, sb->bblog_size = 0; sb->bblog_shift = 0; sb->bblog_offset = 0; + } else if (strcmp(update, "ppl") == 0) { + unsigned long long sb_offset = __le64_to_cpu(sb->super_offset); + unsigned long long data_offset = __le64_to_cpu(sb->data_offset); + unsigned long long data_size = __le64_to_cpu(sb->data_size); + long bb_offset = __le32_to_cpu(sb->bblog_offset); + int space; + int optimal_space; + int offset; + + if (sb->feature_map & __cpu_to_le32(MD_FEATURE_BITMAP_OFFSET)) { + pr_err("Cannot add PPL to array with bitmap\n"); + return -2; + } + + if (sb->feature_map & __cpu_to_le32(MD_FEATURE_JOURNAL)) { + pr_err("Cannot add PPL to array with journal\n"); + return -2; + } + + if (sb_offset < data_offset) { + if (bb_offset) + space = bb_offset - 8; + else + space = data_offset - sb_offset - 8; + offset = 8; + } else { + offset = -(sb_offset - data_offset - data_size); + if (offset < INT16_MIN) + offset = INT16_MIN; + space = -(offset - bb_offset); + } + + if (space < (PPL_HEADER_SIZE >> 9) + 8) { + pr_err("Not enough space to add ppl\n"); + return -2; + } + + optimal_space = choose_ppl_space(__le32_to_cpu(sb->chunksize)); + + if (space > optimal_space) + space = optimal_space; + if (space > UINT16_MAX) + space = UINT16_MAX; + + sb->ppl.offset = __cpu_to_le16(offset); + sb->ppl.size = __cpu_to_le16(space); + sb->feature_map |= __cpu_to_le32(MD_FEATURE_PPL); + } else if (strcmp(update, "no-ppl") == 0) { + sb->feature_map &= ~ __cpu_to_le32(MD_FEATURE_PPL); } else if (strcmp(update, "name") == 0) { if (info->name[0] == 0) sprintf(info->name, "%d", info->array.md_minor); -- 2.10.2
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