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authorMilan Broz <mbroz@redhat.com>2009-01-06 03:05:01 +0000
committerAlasdair G Kergon <agk@redhat.com>2009-01-06 03:05:01 +0000
commit2045e88edb4e0c9ce62d317f77dc59d27d9c530e (patch)
tree324eeea271b889263d0141fe0c82d4b0e43d0079 /drivers/md
parent6f3af01cb0eda0ec50fe1e4cbdf028269dc396fe (diff)
dm log: move region_size validation
Move log size validation from mirror target to log constructor. Removed PAGE_SIZE restriction we no longer think necessary. Signed-off-by: Milan Broz <mbroz@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-log.c16
-rw-r--r--drivers/md/dm-raid1.c12
2 files changed, 14 insertions, 14 deletions
diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index 691cb9c22b5..40ed70df673 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -360,6 +360,17 @@ static int read_header(struct log_c *log)
return 0;
}
+static int _check_region_size(struct dm_target *ti, uint32_t region_size)
+{
+ if (region_size < 2 || region_size > ti->len)
+ return 0;
+
+ if (!is_power_of_2(region_size))
+ return 0;
+
+ return 1;
+}
+
/*----------------------------------------------------------------
* core log constructor/destructor
*
@@ -395,8 +406,9 @@ static int create_log_context(struct dm_dirty_log *log, struct dm_target *ti,
}
}
- if (sscanf(argv[0], "%u", &region_size) != 1) {
- DMWARN("invalid region size string");
+ if (sscanf(argv[0], "%u", &region_size) != 1 ||
+ !_check_region_size(ti, region_size)) {
+ DMWARN("invalid region size %s", argv[0]);
return -EINVAL;
}
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c
index 250f401668d..4d6bc101962 100644
--- a/drivers/md/dm-raid1.c
+++ b/drivers/md/dm-raid1.c
@@ -808,12 +808,6 @@ static void free_context(struct mirror_set *ms, struct dm_target *ti,
kfree(ms);
}
-static inline int _check_region_size(struct dm_target *ti, uint32_t size)
-{
- return !(size % (PAGE_SIZE >> 9) || !is_power_of_2(size) ||
- size > ti->len);
-}
-
static int get_mirror(struct mirror_set *ms, struct dm_target *ti,
unsigned int mirror, char **argv)
{
@@ -872,12 +866,6 @@ static struct dm_dirty_log *create_dirty_log(struct dm_target *ti,
return NULL;
}
- if (!_check_region_size(ti, dl->type->get_region_size(dl))) {
- ti->error = "Invalid region size";
- dm_dirty_log_destroy(dl);
- return NULL;
- }
-
return dl;
}