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SUSE:SLE-12-SP5:GA
mdadm.5365
0134-recreate-journal-in-mdadm.patch
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File 0134-recreate-journal-in-mdadm.patch of Package mdadm.5365
From 01290056d01941c9443dddc33768055bd3ed5a73 Mon Sep 17 00:00:00 2001 From: Song Liu <songliubraving@fb.com> Date: Mon, 14 Dec 2015 17:43:43 -0800 Subject: [PATCH 189/359] recreate journal in mdadm References: bsc#1081910 This patch tries recreates missing/faulty journal in mdadm. Example: ./mdadm --fail /dev/md1 /dev/sdb2 Mdadm: set /dev/sdb2 faulty in /dev/md1 ./mdadm --stop /dev/md1 Mdadm: stopped /dev/md1 ./mdadm -A --scan --force Mdadm: Journal is missing or stale, starting array read only. Mdadm: /dev/md/1 has been started with 15 drives. ./mdadm --add-journal /dev/md1 /dev/sdb2 Mdadm: added /dev/sdb2 Signed-off-by: Song Liu <songliubraving@fb.com> Signed-off-by: Shaohua Li <shli@fb.com> Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Coly Li <colyli@suse.de> --- Manage.c | 42 +++++++++++++++++++++++++++++++++++++++--- ReadMe.c | 1 + mdadm.c | 8 ++++++++ mdadm.h | 1 + super1.c | 3 ++- 5 files changed, 51 insertions(+), 4 deletions(-) diff --git a/Manage.c b/Manage.c index 2df303d..4540fac 100644 --- a/Manage.c +++ b/Manage.c @@ -825,7 +825,8 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv, } /* Make sure device is large enough */ - if (tst->sb && + if (dv->disposition != 'j' && /* skip size check for Journal */ + tst->sb && tst->ss->avail_size(tst, ldsize/512, INVALID_SECTORS) < array_size) { if (dv->disposition == 'M') @@ -929,8 +930,31 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv, else disc.number = raid_slot; disc.state = 0; + + /* only add journal to array that supports journaling */ + if (dv->disposition == 'j') { + struct mdinfo mdi; + struct mdinfo *mdp; + + mdp = sysfs_read(fd, NULL, GET_ARRAY_STATE); + + if (strncmp(mdp->sysfs_array_state, "readonly", 8) != 0) { + pr_err("%s is not readonly, cannot add journal.\n", devname); + return -1; + } + + tst->ss->getinfo_super(tst, &mdi, NULL); + if (mdi.journal_device_required == 0) { + pr_err("%s does not support journal device.\n", devname); + return -1; + } + disc.raid_disk = array->raid_disks; + } + if (array->not_persistent==0) { int dfd; + if (dv->disposition == 'j') + disc.state |= (1 << MD_DISK_JOURNAL) | (1 << MD_DISK_SYNC); if (dv->writemostly == 1) disc.state |= 1 << MD_DISK_WRITEMOSTLY; dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT); @@ -1041,10 +1065,20 @@ int Manage_add(int fd, int tfd, struct mddev_dev *dv, } else { tst->ss->free_super(tst); if (ioctl(fd, ADD_NEW_DISK, &disc)) { - pr_err("add new device failed for %s as %d: %s\n", - dv->devname, j, strerror(errno)); + if (dv->disposition == 'j') + pr_err("Failed to hot add %s as journal, " + "please try restart %s.\n", dv->devname, devname); + else + pr_err("add new device failed for %s as %d: %s\n", + dv->devname, j, strerror(errno)); return -1; } + if (dv->disposition == 'j') { + pr_err("Journal added successfully, making %s read-write\n", devname); + if (Manage_ro(devname, fd, -1)) + pr_err("Failed to make %s read-write\n", devname); + } + } if (verbose >= 0) pr_err("added %s\n", dv->devname); @@ -1277,6 +1311,7 @@ int Manage_subdevs(char *devname, int fd, * try HOT_ADD_DISK * If that fails EINVAL, try ADD_NEW_DISK * 'S' - add the device as a spare - don't try re-add + * 'j' - add the device as a journal device * 'A' - re-add the device * 'r' - remove the device: HOT_REMOVE_DISK * device can be 'faulty' or 'detached' in which case all @@ -1509,6 +1544,7 @@ int Manage_subdevs(char *devname, int fd, goto abort; case 'a': case 'S': /* --add-spare */ + case 'j': /* --add-journal */ case 'A': case 'M': /* --re-add missing */ case 'F': /* --re-add faulty */ diff --git a/ReadMe.c b/ReadMe.c index fb5a671..566fc8d 100644 --- a/ReadMe.c +++ b/ReadMe.c @@ -157,6 +157,7 @@ struct option long_options[] = { /* Management */ {"add", 0, 0, Add}, {"add-spare", 0, 0, AddSpare}, + {"add-journal", 0, 0, AddJournal}, {"remove", 0, 0, Remove}, {"fail", 0, 0, Fail}, {"set-faulty",0, 0, Fail}, diff --git a/mdadm.c b/mdadm.c index f56a8cf..feec3b7 100644 --- a/mdadm.c +++ b/mdadm.c @@ -190,6 +190,7 @@ int main(int argc, char *argv[]) case 'a': case Add: case AddSpare: + case AddJournal: case 'r': case Remove: case Replace: @@ -925,6 +926,13 @@ int main(int argc, char *argv[]) case O(MANAGE,AddSpare): /* add drive - never re-add */ devmode = 'S'; continue; + case O(MANAGE,AddJournal): /* add journal */ + if (s.journaldisks && (s.level < 4 || s.level > 6)) { + pr_err("--add-journal is only supported for RAID level 4/5/6.\n"); + exit(2); + } + devmode = 'j'; + continue; case O(MANAGE,ReAdd): devmode = 'A'; continue; diff --git a/mdadm.h b/mdadm.h index 21fe789..477ef18 100755 --- a/mdadm.h +++ b/mdadm.h @@ -370,6 +370,7 @@ enum special_options { ManageOpt, Add, AddSpare, + AddJournal, Remove, Fail, Replace, diff --git a/super1.c b/super1.c index 1735c2d..893f9bf 100644 --- a/super1.c +++ b/super1.c @@ -1713,7 +1713,8 @@ static int write_init_super1(struct supertype *st) if (rfd >= 0) close(rfd); - sb->events = 0; + if (!(di->disk.state & (1<<MD_DISK_JOURNAL))) + sb->events = 0; refst = dup_super(st); if (load_super1(refst, di->fd, NULL)==0) { -- 2.16.1
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