Add support for changing devices alignment.
Signed-off-by: Joao Martins <[email protected]>
---
daxctl/lib/libdaxctl-private.h | 1 +
daxctl/lib/libdaxctl.c | 34 ++++++++++++++++++++++++++++++++++
daxctl/lib/libdaxctl.sym | 2 ++
daxctl/libdaxctl.h | 2 ++
4 files changed, 39 insertions(+)
diff --git a/daxctl/lib/libdaxctl-private.h b/daxctl/lib/libdaxctl-private.h
index 9f9c70d6024f..b307a8bc9438 100644
--- a/daxctl/lib/libdaxctl-private.h
+++ b/daxctl/lib/libdaxctl-private.h
@@ -99,6 +99,7 @@ struct daxctl_dev {
struct list_node list;
unsigned long long resource;
unsigned long long size;
+ unsigned long align;
struct kmod_module *module;
struct daxctl_region *region;
struct daxctl_memory *mem;
diff --git a/daxctl/lib/libdaxctl.c b/daxctl/lib/libdaxctl.c
index 9b43b68facfe..c62e04bcdfd1 100644
--- a/daxctl/lib/libdaxctl.c
+++ b/daxctl/lib/libdaxctl.c
@@ -498,6 +498,11 @@ static void *add_dax_dev(void *parent, int id, const char
*daxdev_base)
goto err_read;
dev->size = strtoull(buf, NULL, 0);
+ sprintf(path, "%s/align", daxdev_base);
+ if (sysfs_read_attr(ctx, path, buf) < 0)
+ goto err_read;
+ dev->align = strtoull(buf, NULL, 0);
+
dev->dev_path = strdup(daxdev_base);
if (!dev->dev_path)
goto err_read;
@@ -1086,6 +1091,35 @@ DAXCTL_EXPORT int daxctl_dev_set_size(struct daxctl_dev
*dev, unsigned long long
return 0;
}
+DAXCTL_EXPORT unsigned long daxctl_dev_get_align(struct daxctl_dev *dev)
+{
+ return dev->align;
+}
+
+DAXCTL_EXPORT int daxctl_dev_set_align(struct daxctl_dev *dev, unsigned long
align)
+{
+ struct daxctl_ctx *ctx = daxctl_dev_get_ctx(dev);
+ char buf[SYSFS_ATTR_SIZE];
+ char *path = dev->dev_buf;
+ int len = dev->buf_len;
+
+ if (snprintf(path, len, "%s/align", dev->dev_path) >= len) {
+ err(ctx, "%s: buffer too small!\n",
+ daxctl_dev_get_devname(dev));
+ return -ENXIO;
+ }
+
+ sprintf(buf, "%#lx\n", align);
+ if (sysfs_write_attr(ctx, path, buf) < 0) {
+ err(ctx, "%s: failed to set align\n",
+ daxctl_dev_get_devname(dev));
+ return -ENXIO;
+ }
+
+ dev->align = align;
+ return 0;
+}
+
DAXCTL_EXPORT int daxctl_dev_get_target_node(struct daxctl_dev *dev)
{
return dev->target_node;
diff --git a/daxctl/lib/libdaxctl.sym b/daxctl/lib/libdaxctl.sym
index 33c926411037..c3d08179c9fd 100644
--- a/daxctl/lib/libdaxctl.sym
+++ b/daxctl/lib/libdaxctl.sym
@@ -81,4 +81,6 @@ global:
daxctl_dev_set_size;
daxctl_region_create_dev;
daxctl_region_destroy_dev;
+ daxctl_dev_get_align;
+ daxctl_dev_set_align;
} LIBDAXCTL_7;
diff --git a/daxctl/libdaxctl.h b/daxctl/libdaxctl.h
index 2b14faad1895..b0bb5d78d357 100644
--- a/daxctl/libdaxctl.h
+++ b/daxctl/libdaxctl.h
@@ -71,6 +71,8 @@ int daxctl_dev_get_minor(struct daxctl_dev *dev);
unsigned long long daxctl_dev_get_resource(struct daxctl_dev *dev);
unsigned long long daxctl_dev_get_size(struct daxctl_dev *dev);
int daxctl_dev_set_size(struct daxctl_dev *dev, unsigned long long size);
+unsigned long daxctl_dev_get_align(struct daxctl_dev *dev);
+int daxctl_dev_set_align(struct daxctl_dev *dev, unsigned long align);
struct daxctl_ctx *daxctl_dev_get_ctx(struct daxctl_dev *dev);
int daxctl_dev_is_enabled(struct daxctl_dev *dev);
int daxctl_dev_disable(struct daxctl_dev *dev);
--
1.8.3.1
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