Define imsm_analyze_change function
Function intended to use for single volume migration. Function analyze transition and validate if it is supported. Signed-off-by: Krzysztof Wojcik <krzysztof.wojcik@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Krzysztof Wojcik
NeilBrown
parent
300f503323
commit
471bceb681
146
super-intel.c
146
super-intel.c
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@ -6547,16 +6547,113 @@ static void imsm_update_metadata_locally(struct supertype *st,
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}
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}
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/*******************************************************************************
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/***************************************************************************
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* Function: imsm_analyze_change
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* Description: Function analyze and validate change for single volume migration
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* Description: Function analyze change for single volume
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* and validate if transition is supported
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* Parameters: Geometry parameters, supertype structure
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* Returns: Operation type code on success, -1 if fail
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********************************************************************************/
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enum imsm_reshape_type imsm_analyze_change(
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struct supertype *st, struct geo_params *geo)
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****************************************************************************/
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enum imsm_reshape_type imsm_analyze_change(struct supertype *st,
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struct geo_params *geo)
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{
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return -1;
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struct mdinfo info;
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int change = -1;
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int check_devs = 0;
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getinfo_super_imsm_volume(st, &info, NULL);
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if ((geo->level != info.array.level) &&
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(geo->level >= 0) &&
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(geo->level != UnSet)) {
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switch (info.array.level) {
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case 0:
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if (geo->level == 5) {
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change = CH_LEVEL_MIGRATION;
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check_devs = 1;
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}
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if (geo->level == 10) {
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change = CH_TAKEOVER;
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check_devs = 1;
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}
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break;
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case 5:
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if (geo->level != 0)
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change = CH_LEVEL_MIGRATION;
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break;
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case 10:
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if (geo->level == 0) {
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change = CH_TAKEOVER;
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check_devs = 1;
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}
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break;
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}
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if (change == -1) {
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fprintf(stderr,
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Name " Error. Level Migration from %d to %d "
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"not supported!\n",
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info.array.level, geo->level);
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goto analyse_change_exit;
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}
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} else
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geo->level = info.array.level;
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if ((geo->layout != info.array.layout)
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&& ((geo->layout != UnSet) && (geo->layout != -1))) {
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change = CH_LEVEL_MIGRATION;
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if ((info.array.layout == 0)
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&& (info.array.level == 5)
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&& (geo->layout == 5)) {
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/* reshape 5 -> 4 */
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} else if ((info.array.layout == 5)
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&& (info.array.level == 5)
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&& (geo->layout == 0)) {
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/* reshape 4 -> 5 */
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geo->layout = 0;
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geo->level = 5;
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} else {
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fprintf(stderr,
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Name " Error. Layout Migration from %d to %d "
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"not supported!\n",
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info.array.layout, geo->layout);
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change = -1;
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goto analyse_change_exit;
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}
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} else
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geo->layout = info.array.layout;
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if ((geo->chunksize > 0) && (geo->chunksize != UnSet)
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&& (geo->chunksize != info.array.chunk_size))
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change = CH_CHUNK_MIGR;
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else
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geo->chunksize = info.array.chunk_size;
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if (!validate_geometry_imsm(st,
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geo->level,
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geo->layout,
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geo->raid_disks,
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(geo->chunksize / 1024),
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geo->size,
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0, 0, 1))
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change = -1;
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if (check_devs) {
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struct intel_super *super = st->sb;
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struct imsm_super *mpb = super->anchor;
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if (mpb->num_raid_devs > 1) {
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fprintf(stderr,
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Name " Error. Cannot perform operation on %s"
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"- for this operation it MUST be single "
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"array in container\n",
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geo->dev_name);
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change = -1;
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}
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}
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analyse_change_exit:
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return change;
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}
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static int imsm_reshape_super(struct supertype *st, long long size, int level,
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@ -6616,22 +6713,41 @@ static int imsm_reshape_super(struct supertype *st, long long size, int level,
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}
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} else {
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/* On volume level we support following operations
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* - takeover: raid10 -> raid0; raid0 -> raid10
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* - chunk size migration
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* - migration: raid5 -> raid0; raid0 -> raid5
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*/
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int change;
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* - takeover: raid10 -> raid0; raid0 -> raid10
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* - chunk size migration
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* - migration: raid5 -> raid0; raid0 -> raid5
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*/
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struct intel_super *super = st->sb;
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struct intel_dev *dev = super->devlist;
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int change, devnum;
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dprintf("imsm: info: Volume operation\n");
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/* find requested device */
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while (dev) {
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imsm_find_array_minor_by_subdev(dev->index, st->container_dev, &devnum);
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if (devnum == geo.dev_id)
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break;
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dev = dev->next;
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}
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if (dev == NULL) {
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fprintf(stderr, Name " Cannot find %s (%i) subarray\n",
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geo.dev_name, geo.dev_id);
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goto exit_imsm_reshape_super;
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}
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super->current_vol = dev->index;
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change = imsm_analyze_change(st, &geo);
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switch (change) {
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case CH_TAKEOVER:
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case CH_TAKEOVER:
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ret_val = 0;
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break;
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case CH_CHUNK_MIGR:
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case CH_CHUNK_MIGR:
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ret_val = 0;
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break;
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case CH_LEVEL_MIGRATION:
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case CH_LEVEL_MIGRATION:
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ret_val = 0;
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break;
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default:
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ret_val = 1;
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}
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ret_val = 0;
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}
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exit_imsm_reshape_super:
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