Messages in this thread Patch in this message | | | From | Toshi Kani <> | Subject | [PATCH 1/2] dm: update table type check for dax | Date | Tue, 28 Jun 2016 13:37:15 -0600 |
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Allow table type DM_TYPE_BIO_BASED to extend with DM_TYPE_DAX_BIO_BASED since DM_TYPE_DAX_BIO_BASED supports bio-based requests.
Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Cc: Mike Snitzer <snitzer@redhat.com> Cc: Alasdair Kergon <agk@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> --- drivers/md/dm-ioctl.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index b59e3459..0f32791 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -1267,6 +1267,15 @@ static int populate_table(struct dm_table *table, return dm_table_complete(table); } +static bool is_valid_type(unsigned cur, unsigned new) +{ + if (cur == new || + (cur == DM_TYPE_BIO_BASED && new == DM_TYPE_DAX_BIO_BASED)) + return true; + + return false; +} + static int table_load(struct dm_ioctl *param, size_t param_size) { int r; @@ -1309,7 +1318,7 @@ static int table_load(struct dm_ioctl *param, size_t param_size) DMWARN("unable to set up device queue for new table."); goto err_unlock_md_type; } - } else if (dm_get_md_type(md) != dm_table_get_type(t)) { + } else if (!is_valid_type(dm_get_md_type(md), dm_table_get_type(t))) { DMWARN("can't change device type after initial table load."); r = -EINVAL; goto err_unlock_md_type;
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