8:37 a.m.
The available_size attribute returns all the unused regions, but a
namespace has to use contiguous free regions. This patch uses the
attribute returning the largest capacity that can be created for
determining if the namespace can be created.
Signed-off-by: Keith Busch <keith.busch(a)intel.com>
---
ndctl/lib/libndctl.c | 30 ++++++++++++++++++++++++++++++
ndctl/lib/libndctl.sym | 1 +
ndctl/libndctl.h | 2 ++
ndctl/namespace.c | 2 +-
4 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c
index 47e005e..a820fb3 100644
--- a/ndctl/lib/libndctl.c
+++ b/ndctl/lib/libndctl.c
@@ -2025,6 +2025,36 @@ NDCTL_EXPORT unsigned long long ndctl_region_get_available_size(
return strtoull(buf, NULL, 0);
}
+NDCTL_EXPORT unsigned long long ndctl_region_get_max_available_extent(
+ struct ndctl_region *region)
+{
+ unsigned int nstype = ndctl_region_get_nstype(region);
+ struct ndctl_ctx *ctx = ndctl_region_get_ctx(region);
+ char *path = region->region_buf;
+ int len = region->buf_len;
+ char buf[SYSFS_ATTR_SIZE];
+
+ switch (nstype) {
+ case ND_DEVICE_NAMESPACE_PMEM:
+ case ND_DEVICE_NAMESPACE_BLK:
+ break;
+ default:
+ return 0;
+ }
+
+ if (snprintf(path, len,
+ "%s/max_available_extent", region->region_path) >= len) {
+ err(ctx, "%s: buffer too small!\n",
+ ndctl_region_get_devname(region));
+ return ULLONG_MAX;
+ }
+
+ if (sysfs_read_attr(ctx, path, buf) < 0)
+ return ULLONG_MAX;
+
+ return strtoull(buf, NULL, 0);
+}
+
NDCTL_EXPORT unsigned int ndctl_region_get_range_index(struct ndctl_region *region)
{
return region->range_index;
diff --git a/ndctl/lib/libndctl.sym b/ndctl/lib/libndctl.sym
index c1228e5..22fd026 100644
--- a/ndctl/lib/libndctl.sym
+++ b/ndctl/lib/libndctl.sym
@@ -123,6 +123,7 @@ global:
ndctl_region_get_mappings;
ndctl_region_get_size;
ndctl_region_get_available_size;
+ ndctl_region_get_max_available_extent;
ndctl_region_get_type;
ndctl_region_get_namespace_seed;
ndctl_region_get_btt_seed;
diff --git a/ndctl/libndctl.h b/ndctl/libndctl.h
index be997ac..624115d 100644
--- a/ndctl/libndctl.h
+++ b/ndctl/libndctl.h
@@ -338,6 +338,8 @@ unsigned int ndctl_region_get_interleave_ways(struct ndctl_region
*region);
unsigned int ndctl_region_get_mappings(struct ndctl_region *region);
unsigned long long ndctl_region_get_size(struct ndctl_region *region);
unsigned long long ndctl_region_get_available_size(struct ndctl_region *region);
+unsigned long long ndctl_region_get_max_available_extent(
+ struct ndctl_region *region);
unsigned int ndctl_region_get_range_index(struct ndctl_region *region);
unsigned int ndctl_region_get_type(struct ndctl_region *region);
struct ndctl_namespace *ndctl_region_get_namespace_seed(
diff --git a/ndctl/namespace.c b/ndctl/namespace.c
index fe86d82..4a562a2 100644
--- a/ndctl/namespace.c
+++ b/ndctl/namespace.c
@@ -764,7 +764,7 @@ static int namespace_create(struct ndctl_region *region)
return -EAGAIN;
}
- available = ndctl_region_get_available_size(region);
+ available = ndctl_region_get_max_available_extent(region);
if (!available || p.size > available) {
debug("%s: insufficient capacity size: %llx avail: %llx\n",
devname, p.size, available);
--
2.14.3