dm raid: various code cleanups
Renamed functions and variables with leading single underscore to have a double underscore. Renamed some functions to have better names. Folded functions that were split out without reason. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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Mike Snitzer
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e6ca5e1a03
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@ -195,36 +195,26 @@ struct raid_set {
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struct raid_dev dev[0];
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};
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/* Backup/restore raid set configuration helpers */
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static void _rs_config_backup(struct raid_set *rs, struct rs_layout *l)
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static void rs_config_backup(struct raid_set *rs)
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{
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struct mddev *mddev = &rs->md;
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struct rs_layout *l = &rs->rs_layout;
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l->new_level = mddev->new_level;
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l->new_layout = mddev->new_layout;
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l->new_chunk_sectors = mddev->new_chunk_sectors;
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}
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static void rs_config_backup(struct raid_set *rs)
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{
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return _rs_config_backup(rs, &rs->rs_layout);
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}
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static void _rs_config_restore(struct raid_set *rs, struct rs_layout *l)
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static void rs_config_restore(struct raid_set *rs)
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{
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struct mddev *mddev = &rs->md;
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struct rs_layout *l = &rs->rs_layout;
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mddev->new_level = l->new_level;
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mddev->new_layout = l->new_layout;
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mddev->new_chunk_sectors = l->new_chunk_sectors;
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}
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static void rs_config_restore(struct raid_set *rs)
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{
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return _rs_config_restore(rs, &rs->rs_layout);
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}
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/* END: backup/restore raid set configuration helpers */
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/* raid10 algorithms (i.e. formats) */
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#define ALGORITHM_RAID10_DEFAULT 0
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#define ALGORITHM_RAID10_NEAR 1
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@ -272,7 +262,7 @@ static bool __within_range(long v, long min, long max)
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static struct arg_name_flag {
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const unsigned long flag;
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const char *name;
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} _arg_name_flags[] = {
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} __arg_name_flags[] = {
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{ CTR_FLAG_SYNC, "sync"},
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{ CTR_FLAG_NOSYNC, "nosync"},
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{ CTR_FLAG_REBUILD, "rebuild"},
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@ -294,9 +284,9 @@ static struct arg_name_flag {
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static const char *dm_raid_arg_name_by_flag(const uint32_t flag)
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{
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if (hweight32(flag) == 1) {
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struct arg_name_flag *anf = _arg_name_flags + ARRAY_SIZE(_arg_name_flags);
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struct arg_name_flag *anf = __arg_name_flags + ARRAY_SIZE(__arg_name_flags);
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while (anf-- > _arg_name_flags)
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while (anf-- > __arg_name_flags)
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if (flag & anf->flag)
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return anf->name;
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@ -365,7 +355,7 @@ static bool rt_is_raid456(struct raid_type *rt)
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/* END: raid level bools */
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/* Return invalid ctr flags for the raid level of @rs */
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static uint32_t _invalid_flags(struct raid_set *rs)
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static uint32_t __invalid_flags(struct raid_set *rs)
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{
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if (rt_is_raid0(rs->raid_type))
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return RAID0_INVALID_FLAGS;
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@ -388,7 +378,7 @@ static uint32_t _invalid_flags(struct raid_set *rs)
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*/
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static int rs_check_for_invalid_flags(struct raid_set *rs)
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{
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if (rs->ctr_flags & _invalid_flags(rs)) {
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if (rs->ctr_flags & __invalid_flags(rs)) {
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rs->ti->error = "Invalid flags combination";
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return -EINVAL;
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}
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@ -396,7 +386,6 @@ static int rs_check_for_invalid_flags(struct raid_set *rs)
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return 0;
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}
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/* MD raid10 bit definitions and helpers */
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#define RAID10_OFFSET (1 << 16) /* stripes with data copies area adjacent on devices */
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#define RAID10_BROCKEN_USE_FAR_SETS (1 << 17) /* Broken in raid10.c: use sets instead of whole stripe rotation */
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@ -404,33 +393,33 @@ static int rs_check_for_invalid_flags(struct raid_set *rs)
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#define RAID10_FAR_COPIES_SHIFT 8 /* raid10 # far copies shift (2nd byte of layout) */
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/* Return md raid10 near copies for @layout */
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static unsigned int _raid10_near_copies(int layout)
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static unsigned int __raid10_near_copies(int layout)
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{
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return layout & 0xFF;
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}
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/* Return md raid10 far copies for @layout */
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static unsigned int _raid10_far_copies(int layout)
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static unsigned int __raid10_far_copies(int layout)
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{
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return _raid10_near_copies(layout >> RAID10_FAR_COPIES_SHIFT);
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return __raid10_near_copies(layout >> RAID10_FAR_COPIES_SHIFT);
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}
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/* Return true if md raid10 offset for @layout */
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static unsigned int _is_raid10_offset(int layout)
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static unsigned int __is_raid10_offset(int layout)
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{
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return layout & RAID10_OFFSET;
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}
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/* Return true if md raid10 near for @layout */
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static unsigned int _is_raid10_near(int layout)
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static unsigned int __is_raid10_near(int layout)
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{
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return !_is_raid10_offset(layout) && _raid10_near_copies(layout) > 1;
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return !__is_raid10_offset(layout) && __raid10_near_copies(layout) > 1;
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}
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/* Return true if md raid10 far for @layout */
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static unsigned int _is_raid10_far(int layout)
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static unsigned int __is_raid10_far(int layout)
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{
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return !_is_raid10_offset(layout) && _raid10_far_copies(layout) > 1;
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return !__is_raid10_offset(layout) && __raid10_far_copies(layout) > 1;
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}
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/* Return md raid10 layout string for @layout */
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@ -442,13 +431,13 @@ static const char *raid10_md_layout_to_format(int layout)
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*
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* Refer to MD's raid10.c for details
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*/
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if (_is_raid10_offset(layout))
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if (__is_raid10_offset(layout))
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return "offset";
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if (_raid10_near_copies(layout) > 1)
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if (__raid10_near_copies(layout) > 1)
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return "near";
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WARN_ON(_raid10_far_copies(layout) < 2);
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WARN_ON(__raid10_far_copies(layout) < 2);
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return "far";
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}
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@ -466,12 +455,11 @@ static const int raid10_name_to_format(const char *name)
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return -EINVAL;
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}
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/* Return md raid10 copies for @layout */
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static unsigned int raid10_md_layout_to_copies(int layout)
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{
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return _raid10_near_copies(layout) > 1 ?
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_raid10_near_copies(layout) : _raid10_far_copies(layout);
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return __raid10_near_copies(layout) > 1 ?
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__raid10_near_copies(layout) : __raid10_far_copies(layout);
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}
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/* Return md raid10 format id for @format string */
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@ -513,17 +501,17 @@ static int raid10_format_to_md_layout(struct raid_set *rs,
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/* END: MD raid10 bit definitions and helpers */
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/* Check for any of the raid10 algorithms */
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static int _got_raid10(struct raid_type *rtp, const int layout)
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static int __got_raid10(struct raid_type *rtp, const int layout)
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{
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if (rtp->level == 10) {
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switch (rtp->algorithm) {
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case ALGORITHM_RAID10_DEFAULT:
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case ALGORITHM_RAID10_NEAR:
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return _is_raid10_near(layout);
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return __is_raid10_near(layout);
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case ALGORITHM_RAID10_OFFSET:
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return _is_raid10_offset(layout);
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return __is_raid10_offset(layout);
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case ALGORITHM_RAID10_FAR:
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return _is_raid10_far(layout);
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return __is_raid10_far(layout);
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default:
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break;
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}
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@ -552,7 +540,7 @@ static struct raid_type *get_raid_type_by_ll(const int level, const int layout)
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while (rtp-- > raid_types) {
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/* RAID10 special checks based on @layout flags/properties */
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if (rtp->level == level &&
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(_got_raid10(rtp, layout) || rtp->algorithm == layout))
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(__got_raid10(rtp, layout) || rtp->algorithm == layout))
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return rtp;
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}
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@ -1352,10 +1340,10 @@ static int rs_check_takeover(struct raid_set *rs)
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case 10:
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/* Can't takeover raid10_offset! */
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if (_is_raid10_offset(mddev->layout))
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if (__is_raid10_offset(mddev->layout))
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break;
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near_copies = _raid10_near_copies(mddev->layout);
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near_copies = __raid10_near_copies(mddev->layout);
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/* raid10* -> raid0 */
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if (mddev->new_level == 0) {
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@ -1369,7 +1357,7 @@ static int rs_check_takeover(struct raid_set *rs)
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/* Can takeover raid10_far */
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if (near_copies == 1 &&
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_raid10_far_copies(mddev->layout) > 1)
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__raid10_far_copies(mddev->layout) > 1)
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return 0;
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break;
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@ -1377,7 +1365,7 @@ static int rs_check_takeover(struct raid_set *rs)
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/* raid10_{near,far} -> raid1 */
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if (mddev->new_level == 1 &&
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max(near_copies, _raid10_far_copies(mddev->layout)) == mddev->raid_disks)
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max(near_copies, __raid10_far_copies(mddev->layout)) == mddev->raid_disks)
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return 0;
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/* raid10_{near,far} with 2 disks -> raid4/5 */
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@ -1914,8 +1902,8 @@ static int super_init_validation(struct raid_set *rs, struct md_rdev *rdev)
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continue;
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if (role != r->raid_disk) {
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if (_is_raid10_near(mddev->layout)) {
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if (mddev->raid_disks % _raid10_near_copies(mddev->layout) ||
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if (__is_raid10_near(mddev->layout)) {
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if (mddev->raid_disks % __raid10_near_copies(mddev->layout) ||
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rs->raid_disks % rs->raid10_copies) {
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rs->ti->error =
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"Cannot change raid10 near set to odd # of devices!";
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@ -2099,7 +2087,7 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs)
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}
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/* Userpace reordered disks -> adjust raid_disk indexes in @rs */
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static void _reorder_raid_disk_indexes(struct raid_set *rs)
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static void __reorder_raid_disk_indexes(struct raid_set *rs)
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{
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int i = 0;
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struct md_rdev *rdev;
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@ -2123,7 +2111,7 @@ static int rs_setup_takeover(struct raid_set *rs)
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if (rt_is_raid10(rs->raid_type)) {
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if (mddev->level == 0) {
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/* Userpace reordered disks -> adjust raid_disk indexes */
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_reorder_raid_disk_indexes(rs);
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__reorder_raid_disk_indexes(rs);
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/* raid0 -> raid10_far layout */
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mddev->layout = raid10_format_to_md_layout(rs, ALGORITHM_RAID10_FAR,
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@ -2400,7 +2388,7 @@ static const char *decipher_sync_action(struct mddev *mddev)
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* 'a' = Alive but not in-sync
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* 'A' = Alive and in-sync
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*/
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static const char *_raid_dev_status(struct md_rdev *rdev, bool array_in_sync)
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static const char *__raid_dev_status(struct md_rdev *rdev, bool array_in_sync)
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{
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if (test_bit(Faulty, &rdev->flags))
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return "D";
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@ -2484,7 +2472,7 @@ static sector_t rs_get_progress(struct raid_set *rs,
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}
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/* Helper to return @dev name or "-" if !@dev */
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static const char *_get_dev_name(struct dm_dev *dev)
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static const char *__get_dev_name(struct dm_dev *dev)
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{
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return dev ? dev->name : "-";
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}
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@ -2526,7 +2514,7 @@ static void raid_status(struct dm_target *ti, status_type_t type,
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/* HM FIXME: do we want another state char for raid0? It shows 'D' or 'A' now */
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rdev_for_each(rdev, mddev)
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DMEMIT(_raid_dev_status(rdev, array_in_sync));
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DMEMIT(__raid_dev_status(rdev, array_in_sync));
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/*
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* In-sync/Reshape ratio:
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@ -2634,8 +2622,8 @@ static void raid_status(struct dm_target *ti, status_type_t type,
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rdev_for_each(rdev, mddev) {
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struct raid_dev *rd = container_of(rdev, struct raid_dev, rdev);
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DMEMIT(" %s %s", _get_dev_name(rd->meta_dev),
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_get_dev_name(rd->data_dev));
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DMEMIT(" %s %s", __get_dev_name(rd->meta_dev),
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__get_dev_name(rd->data_dev));
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}
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}
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}
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@ -2792,8 +2780,7 @@ static void attempt_restore_of_faulty_devices(struct raid_set *rs)
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}
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}
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/* Load the dirty region bitmap */
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static int _bitmap_load(struct raid_set *rs)
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static int __load_dirty_region_bitmap(struct raid_set *rs)
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{
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int r = 0;
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@ -2819,7 +2806,7 @@ static int raid_preresume(struct dm_target *ti)
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/*
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* The superblocks need to be updated on disk if the
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* array is new or _bitmap_load will overwrite them
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* array is new or __load_dirty_region_bitmap will overwrite them
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* in core with old data.
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*
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* In case the array got modified (takeover/reshape/resize)
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@ -2843,7 +2830,7 @@ static int raid_preresume(struct dm_target *ti)
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configure_discard_support(rs);
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/* Load the bitmap from disk unless raid0 */
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return _bitmap_load(rs);
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return __load_dirty_region_bitmap(rs);
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}
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static void raid_resume(struct dm_target *ti)
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