From: Vishal Verma <vishal.l.verma@intel.com>
To: linux-nvdimm@lists.01.org
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
Pavel Tatashin <pasha.tatashin@soleen.com>
Subject: [ndctl PATCH v4 01/10] libdaxctl: add interfaces in support of device modes
Date: Tue, 28 May 2019 16:24:31 -0600 [thread overview]
Message-ID: <20190528222440.30392-2-vishal.l.verma@intel.com> (raw)
In-Reply-To: <20190528222440.30392-1-vishal.l.verma@intel.com>
In preparation for libdaxctl and daxctl to grow operational modes for
DAX devices, add the following supporting APIs:
daxctl_dev_get_ctx
daxctl_dev_is_enabled
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
daxctl/lib/libdaxctl.c | 30 ++++++++++++++++++++++++++++++
daxctl/lib/libdaxctl.sym | 6 ++++++
daxctl/libdaxctl.h | 2 ++
3 files changed, 38 insertions(+)
diff --git a/daxctl/lib/libdaxctl.c b/daxctl/lib/libdaxctl.c
index c2e3a52..70f896b 100644
--- a/daxctl/lib/libdaxctl.c
+++ b/daxctl/lib/libdaxctl.c
@@ -559,6 +559,36 @@ static void dax_regions_init(struct daxctl_ctx *ctx)
}
}
+static int is_enabled(const char *drvpath)
+{
+ struct stat st;
+
+ if (lstat(drvpath, &st) < 0 || !S_ISLNK(st.st_mode))
+ return 0;
+ else
+ return 1;
+}
+
+DAXCTL_EXPORT int daxctl_dev_is_enabled(struct daxctl_dev *dev)
+{
+ struct daxctl_ctx *ctx = daxctl_dev_get_ctx(dev);
+ char *path = dev->dev_buf;
+ int len = dev->buf_len;
+
+ if (snprintf(path, len, "%s/driver", dev->dev_path) >= len) {
+ err(ctx, "%s: buffer too small!\n",
+ daxctl_dev_get_devname(dev));
+ return 0;
+ }
+
+ return is_enabled(path);
+}
+
+DAXCTL_EXPORT struct daxctl_ctx *daxctl_dev_get_ctx(struct daxctl_dev *dev)
+{
+ return dev->region->ctx;
+}
+
DAXCTL_EXPORT struct daxctl_dev *daxctl_dev_get_first(struct daxctl_region *region)
{
dax_devices_init(region);
diff --git a/daxctl/lib/libdaxctl.sym b/daxctl/lib/libdaxctl.sym
index 84d3a69..c4af9a7 100644
--- a/daxctl/lib/libdaxctl.sym
+++ b/daxctl/lib/libdaxctl.sym
@@ -50,3 +50,9 @@ LIBDAXCTL_5 {
global:
daxctl_region_get_path;
} LIBDAXCTL_4;
+
+LIBDAXCTL_6 {
+global:
+ daxctl_dev_get_ctx;
+ daxctl_dev_is_enabled;
+} LIBDAXCTL_5;
diff --git a/daxctl/libdaxctl.h b/daxctl/libdaxctl.h
index 1d13ea2..e20ccb4 100644
--- a/daxctl/libdaxctl.h
+++ b/daxctl/libdaxctl.h
@@ -67,6 +67,8 @@ const char *daxctl_dev_get_devname(struct daxctl_dev *dev);
int daxctl_dev_get_major(struct daxctl_dev *dev);
int daxctl_dev_get_minor(struct daxctl_dev *dev);
unsigned long long daxctl_dev_get_size(struct daxctl_dev *dev);
+struct daxctl_ctx *daxctl_dev_get_ctx(struct daxctl_dev *dev);
+int daxctl_dev_is_enabled(struct daxctl_dev *dev);
#define daxctl_dev_foreach(region, dev) \
for (dev = daxctl_dev_get_first(region); \
--
2.20.1
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next prev parent reply other threads:[~2019-05-28 22:24 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-28 22:24 [ndctl PATCH v4 00/10] daxctl: add a new reconfigure-device command Vishal Verma
2019-05-28 22:24 ` Vishal Verma [this message]
2019-05-28 22:24 ` [ndctl PATCH v4 02/10] libdaxctl: cache 'subsystem' in daxctl_ctx Vishal Verma
2019-05-29 0:27 ` Dan Williams
2019-05-29 17:25 ` Verma, Vishal L
2019-05-28 22:24 ` [ndctl PATCH v4 03/10] libdaxctl: add interfaces to enable/disable devices Vishal Verma
2019-05-29 2:13 ` Dan Williams
2019-05-29 16:55 ` Verma, Vishal L
2019-05-28 22:24 ` [ndctl PATCH v4 04/10] libdaxctl: add interfaces to get/set the online state for a node Vishal Verma
2019-05-29 3:18 ` Dan Williams
2019-05-28 22:24 ` [ndctl PATCH v4 05/10] daxctl/list: add numa_node for device listings Vishal Verma
2019-05-29 3:22 ` Dan Williams
2019-05-28 22:24 ` [ndctl PATCH v4 06/10] libdaxctl: add an interface to get the mode for a dax device Vishal Verma
2019-05-29 17:43 ` Dan Williams
2019-05-28 22:24 ` [ndctl PATCH v4 07/10] daxctl: add a new reconfigure-device command Vishal Verma
2019-05-28 22:24 ` [ndctl PATCH v4 08/10] Documentation/daxctl: add a man page for daxctl-reconfigure-device Vishal Verma
2019-05-29 17:49 ` Dan Williams
2019-05-29 18:04 ` Verma, Vishal L
2019-05-28 22:24 ` [ndctl PATCH v4 09/10] contrib/ndctl: fix region-id completions for daxctl Vishal Verma
2019-05-28 22:24 ` [ndctl PATCH v4 10/10] contrib/ndctl: add bash-completion for daxctl-reconfigure-device Vishal Verma
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