ddf: teach set_disk to cope with new or changed devices.
When set_disk is called, we need to check if the disk has changed or recently appeared, and update everything properly if it has. Signed-off-by: NeilBrown <neilb@suse.de>
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8a38cb04de
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41
super-ddf.c
41
super-ddf.c
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@ -3151,6 +3151,9 @@ static int ddf_set_array_state(struct active_array *a, int consistent)
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return consistent;
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}
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#define container_of(ptr, type, member) ({ \
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const typeof( ((type *)0)->member ) *__mptr = (ptr); \
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(type *)( (char *)__mptr - offsetof(type,member) );})
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/*
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* The state of each disk is stored in the global phys_disk structure
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* in phys_disk.entries[n].state.
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@ -3172,20 +3175,42 @@ static void ddf_set_disk(struct active_array *a, int n, int state)
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struct vd_config *vc = find_vdcr(ddf, inst);
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int pd = find_phys(ddf, vc->phys_refnum[n]);
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int i, st, working;
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struct mdinfo *mdi;
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struct dl *dl;
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if (vc == NULL) {
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dprintf("ddf: cannot find instance %d!!\n", inst);
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return;
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}
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if (pd < 0) {
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/* disk doesn't currently exist. If it is now in_sync,
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* insert it. */
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/* Find the matching slot in 'info'. */
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for (mdi = a->info.devs; mdi; mdi = mdi->next)
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if (mdi->disk.raid_disk == n)
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break;
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if (!mdi)
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return;
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/* and find the 'dl' entry corresponding to that. */
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for (dl = ddf->dlist; dl; dl = dl->next)
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if (mdi->disk.major == dl->major &&
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mdi->disk.minor == dl->minor)
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break;
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if (!dl)
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return;
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if (pd < 0 || pd != dl->pdnum) {
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/* disk doesn't currently exist or has changed.
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* If it is now in_sync, insert it. */
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if ((state & DS_INSYNC) && ! (state & DS_FAULTY)) {
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/* Find dev 'n' in a->info->devs, determine the
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* ddf refnum, and set vc->phys_refnum and update
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* phys->entries[]
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*/
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/* FIXME */
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struct vcl *vcl;
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pd = dl->pdnum;
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vc->phys_refnum[n] = dl->disk.refnum;
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vcl = container_of(vc, struct vcl, conf);
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vcl->lba_offset[n] = mdi->data_offset;
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ddf->phys->entries[pd].type &=
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~__cpu_to_be16(DDF_Global_Spare);
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ddf->phys->entries[pd].type |=
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__cpu_to_be16(DDF_Active_in_VD);
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ddf->updates_pending = 1;
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}
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} else {
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int old = ddf->phys->entries[pd].state;
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