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dm raid: inverse check for flags from invalid to valid flags

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It is more intuitive to manage each raid level's features in terms of
what is supported rather than what isn't supported.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Heinz Mauelshagen 2016-06-09 16:42:16 +02:00 committed by Mike Snitzer
parent e6ca5e1a03
commit a30cbc0d1c
1 changed files with 56 additions and 32 deletions
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88
drivers/md/dm-raid.c
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@ -113,26 +113,35 @@ struct raid_dev {
CTR_FLAG_DELTA_DISKS | \
CTR_FLAG_DATA_OFFSET)
/* All ctr optional arguments */
#define ALL_CTR_FLAGS (CTR_FLAG_OPTIONS_NO_ARGS | \
CTR_FLAG_OPTIONS_ONE_ARG)
/* Valid options definitions per raid level... */
/* Invalid options definitions per raid level... */
/* "raid0" does only accept data offset */
#define RAID0_VALID_FLAGS (CTR_FLAG_DATA_OFFSET)
/* "raid0" does not accept any options */
#define RAID0_INVALID_FLAGS ALL_CTR_FLAGS
/* "raid1" does not accept stripe cache or any raid10 options */
#define RAID1_INVALID_FLAGS (CTR_FLAG_STRIPE_CACHE | \
CTR_FLAG_RAID10_COPIES | \
CTR_FLAG_RAID10_FORMAT | \
CTR_FLAG_DELTA_DISKS | \
/* "raid1" does not accept stripe cache, data offset, delta_disks or any raid10 options */
#define RAID1_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \
CTR_FLAG_REBUILD | \
CTR_FLAG_WRITE_MOSTLY | \
CTR_FLAG_DAEMON_SLEEP | \
CTR_FLAG_MIN_RECOVERY_RATE | \
CTR_FLAG_MAX_RECOVERY_RATE | \
CTR_FLAG_MAX_WRITE_BEHIND | \
CTR_FLAG_REGION_SIZE | \
CTR_FLAG_DATA_OFFSET)
/* "raid10" does not accept any raid1 or stripe cache options */
#define RAID10_INVALID_FLAGS (CTR_FLAG_WRITE_MOSTLY | \
CTR_FLAG_MAX_WRITE_BEHIND | \
CTR_FLAG_STRIPE_CACHE)
#define RAID10_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \
CTR_FLAG_REBUILD | \
CTR_FLAG_DAEMON_SLEEP | \
CTR_FLAG_MIN_RECOVERY_RATE | \
CTR_FLAG_MAX_RECOVERY_RATE | \
CTR_FLAG_REGION_SIZE | \
CTR_FLAG_RAID10_COPIES | \
CTR_FLAG_RAID10_FORMAT | \
CTR_FLAG_DELTA_DISKS | \
CTR_FLAG_DATA_OFFSET | \
CTR_FLAG_RAID10_USE_NEAR_SETS)
/*
* "raid4/5/6" do not accept any raid1 or raid10 specific options
*
@ -140,13 +149,28 @@ struct raid_dev {
* that both parity and q-syndrome are being written properly with
* any writes
*/
#define RAID45_INVALID_FLAGS (CTR_FLAG_WRITE_MOSTLY | \
#define RAID45_VALID_FLAGS (CTR_FLAGS_ANY_SYNC | \
CTR_FLAG_REBUILD | \
CTR_FLAG_DAEMON_SLEEP | \
CTR_FLAG_MIN_RECOVERY_RATE | \
CTR_FLAG_MAX_RECOVERY_RATE | \
CTR_FLAG_MAX_WRITE_BEHIND | \
CTR_FLAG_RAID10_FORMAT | \
CTR_FLAG_RAID10_COPIES | \
CTR_FLAG_RAID10_USE_NEAR_SETS)
#define RAID6_INVALID_FLAGS (CTR_FLAG_NOSYNC | RAID45_INVALID_FLAGS)
/* ...invalid options definitions per raid level */
CTR_FLAG_STRIPE_CACHE | \
CTR_FLAG_REGION_SIZE | \
CTR_FLAG_DELTA_DISKS | \
CTR_FLAG_DATA_OFFSET)
#define RAID6_VALID_FLAGS (CTR_FLAG_SYNC | \
CTR_FLAG_REBUILD | \
CTR_FLAG_DAEMON_SLEEP | \
CTR_FLAG_MIN_RECOVERY_RATE | \
CTR_FLAG_MAX_RECOVERY_RATE | \
CTR_FLAG_MAX_WRITE_BEHIND | \
CTR_FLAG_STRIPE_CACHE | \
CTR_FLAG_REGION_SIZE | \
CTR_FLAG_DELTA_DISKS | \
CTR_FLAG_DATA_OFFSET)
/* ...valid options definitions per raid level */
/*
* Flags for rs->runtime_flags field
@ -354,31 +378,31 @@ static bool rt_is_raid456(struct raid_type *rt)
}
/* END: raid level bools */
/* Return invalid ctr flags for the raid level of @rs */
static uint32_t __invalid_flags(struct raid_set *rs)
/* Return valid ctr flags for the raid level of @rs */
static unsigned long __valid_flags(struct raid_set *rs)
{
if (rt_is_raid0(rs->raid_type))
return RAID0_INVALID_FLAGS;
return RAID0_VALID_FLAGS;
else if (rt_is_raid1(rs->raid_type))
return RAID1_INVALID_FLAGS;
return RAID1_VALID_FLAGS;
else if (rt_is_raid10(rs->raid_type))
return RAID10_INVALID_FLAGS;
return RAID10_VALID_FLAGS;
else if (rt_is_raid45(rs->raid_type))
return RAID45_INVALID_FLAGS;
return RAID45_VALID_FLAGS;
else if (rt_is_raid6(rs->raid_type))
return RAID6_INVALID_FLAGS;
return RAID6_VALID_FLAGS;
return ~0;
}
/*
* Check for any invalid flags set on @rs defined by bitset @invalid_flags
* Check for valid flags set on @rs
*
* Has to be called after parsing of the ctr flags!
*/
static int rs_check_for_invalid_flags(struct raid_set *rs)
static int rs_check_for_valid_flags(struct raid_set *rs)
{
if (rs->ctr_flags & __invalid_flags(rs)) {
if (rs->ctr_flags & ~__valid_flags(rs)) {
rs->ti->error = "Invalid flags combination";
return -EINVAL;
}
@ -1282,7 +1306,7 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as,
rs->md.external = 1;
/* Check, if any invalid ctr arguments have been passed in for the raid level */
return rs_check_for_invalid_flags(rs);
return rs_check_for_valid_flags(rs);
}
/* Return # of data stripes as kept in mddev as of @rs (i.e. as of superblock) */