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Message-Id: <1444698552-12369-2-git-send-email-sboyd@codeaurora.org>
Date: Mon, 12 Oct 2015 18:09:09 -0700
From: Stephen Boyd <sboyd@...eaurora.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-kernel@...r.kernel.org,
Viresh Kumar <viresh.kumar@...aro.org>
Subject: [PATCH 1/4] debugfs: Consolidate file mode checks in debugfs_create_*()
The code that creates debugfs file with different file ops based
on the file mode is duplicated in each debugfs_create_*() API.
Consolidate that code into debugfs_create_mode(), that takes
three file ops structures so that we don't have to keep
copy/pasting that logic.
Signed-off-by: Stephen Boyd <sboyd@...eaurora.org>
---
fs/debugfs/file.c | 98 ++++++++++++++++++-------------------------------------
1 file changed, 32 insertions(+), 66 deletions(-)
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index b70c20fae502..5d594efa7c93 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -42,6 +42,22 @@ const struct file_operations debugfs_file_operations = {
.llseek = noop_llseek,
};
+static struct dentry *debugfs_create_mode(const char *name, umode_t mode,
+ struct dentry *parent, void *value,
+ const struct file_operations *fops,
+ const struct file_operations *fops_ro,
+ const struct file_operations *fops_wo)
+{
+ /* if there are no write bits set, make read only */
+ if (!(mode & S_IWUGO))
+ return debugfs_create_file(name, mode, parent, value, fops_ro);
+ /* if there are no read bits set, make write only */
+ if (!(mode & S_IRUGO))
+ return debugfs_create_file(name, mode, parent, value, fops_wo);
+
+ return debugfs_create_file(name, mode, parent, value, fops);
+}
+
static int debugfs_u8_set(void *data, u64 val)
{
*(u8 *)data = val;
@@ -83,14 +99,8 @@ DEFINE_SIMPLE_ATTRIBUTE(fops_u8_wo, NULL, debugfs_u8_set, "%llu\n");
struct dentry *debugfs_create_u8(const char *name, umode_t mode,
struct dentry *parent, u8 *value)
{
- /* if there are no write bits set, make read only */
- if (!(mode & S_IWUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_u8_ro);
- /* if there are no read bits set, make write only */
- if (!(mode & S_IRUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_u8_wo);
-
- return debugfs_create_file(name, mode, parent, value, &fops_u8);
+ return debugfs_create_mode(name, mode, parent, value, &fops_u8,
+ &fops_u8_ro, &fops_u8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u8);
@@ -135,14 +145,8 @@ DEFINE_SIMPLE_ATTRIBUTE(fops_u16_wo, NULL, debugfs_u16_set, "%llu\n");
struct dentry *debugfs_create_u16(const char *name, umode_t mode,
struct dentry *parent, u16 *value)
{
- /* if there are no write bits set, make read only */
- if (!(mode & S_IWUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_u16_ro);
- /* if there are no read bits set, make write only */
- if (!(mode & S_IRUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_u16_wo);
-
- return debugfs_create_file(name, mode, parent, value, &fops_u16);
+ return debugfs_create_mode(name, mode, parent, value, &fops_u16,
+ &fops_u16_ro, &fops_u16_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u16);
@@ -187,14 +191,8 @@ DEFINE_SIMPLE_ATTRIBUTE(fops_u32_wo, NULL, debugfs_u32_set, "%llu\n");
struct dentry *debugfs_create_u32(const char *name, umode_t mode,
struct dentry *parent, u32 *value)
{
- /* if there are no write bits set, make read only */
- if (!(mode & S_IWUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_u32_ro);
- /* if there are no read bits set, make write only */
- if (!(mode & S_IRUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_u32_wo);
-
- return debugfs_create_file(name, mode, parent, value, &fops_u32);
+ return debugfs_create_mode(name, mode, parent, value, &fops_u32,
+ &fops_u32_ro, &fops_u32_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u32);
@@ -240,14 +238,8 @@ DEFINE_SIMPLE_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
struct dentry *debugfs_create_u64(const char *name, umode_t mode,
struct dentry *parent, u64 *value)
{
- /* if there are no write bits set, make read only */
- if (!(mode & S_IWUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_u64_ro);
- /* if there are no read bits set, make write only */
- if (!(mode & S_IRUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_u64_wo);
-
- return debugfs_create_file(name, mode, parent, value, &fops_u64);
+ return debugfs_create_mode(name, mode, parent, value, &fops_u64,
+ &fops_u64_ro, &fops_u64_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_u64);
@@ -286,14 +278,8 @@ DEFINE_SIMPLE_ATTRIBUTE(fops_x64, debugfs_u64_get, debugfs_u64_set, "0x%016llx\n
struct dentry *debugfs_create_x8(const char *name, umode_t mode,
struct dentry *parent, u8 *value)
{
- /* if there are no write bits set, make read only */
- if (!(mode & S_IWUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_x8_ro);
- /* if there are no read bits set, make write only */
- if (!(mode & S_IRUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_x8_wo);
-
- return debugfs_create_file(name, mode, parent, value, &fops_x8);
+ return debugfs_create_mode(name, mode, parent, value, &fops_x8,
+ &fops_x8_ro, &fops_x8_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x8);
@@ -310,14 +296,8 @@ EXPORT_SYMBOL_GPL(debugfs_create_x8);
struct dentry *debugfs_create_x16(const char *name, umode_t mode,
struct dentry *parent, u16 *value)
{
- /* if there are no write bits set, make read only */
- if (!(mode & S_IWUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_x16_ro);
- /* if there are no read bits set, make write only */
- if (!(mode & S_IRUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_x16_wo);
-
- return debugfs_create_file(name, mode, parent, value, &fops_x16);
+ return debugfs_create_mode(name, mode, parent, value, &fops_x16,
+ &fops_x16_ro, &fops_x16_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x16);
@@ -334,14 +314,8 @@ EXPORT_SYMBOL_GPL(debugfs_create_x16);
struct dentry *debugfs_create_x32(const char *name, umode_t mode,
struct dentry *parent, u32 *value)
{
- /* if there are no write bits set, make read only */
- if (!(mode & S_IWUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_x32_ro);
- /* if there are no read bits set, make write only */
- if (!(mode & S_IRUGO))
- return debugfs_create_file(name, mode, parent, value, &fops_x32_wo);
-
- return debugfs_create_file(name, mode, parent, value, &fops_x32);
+ return debugfs_create_mode(name, mode, parent, value, &fops_x32,
+ &fops_x32_ro, &fops_x32_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_x32);
@@ -422,16 +396,8 @@ DEFINE_SIMPLE_ATTRIBUTE(fops_atomic_t_wo, NULL, debugfs_atomic_t_set, "%lld\n");
struct dentry *debugfs_create_atomic_t(const char *name, umode_t mode,
struct dentry *parent, atomic_t *value)
{
- /* if there are no write bits set, make read only */
- if (!(mode & S_IWUGO))
- return debugfs_create_file(name, mode, parent, value,
- &fops_atomic_t_ro);
- /* if there are no read bits set, make write only */
- if (!(mode & S_IRUGO))
- return debugfs_create_file(name, mode, parent, value,
- &fops_atomic_t_wo);
-
- return debugfs_create_file(name, mode, parent, value, &fops_atomic_t);
+ return debugfs_create_mode(name, mode, parent, value, &fops_atomic_t,
+ &fops_atomic_t_ro, &fops_atomic_t_wo);
}
EXPORT_SYMBOL_GPL(debugfs_create_atomic_t);
--
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a Linux Foundation Collaborative Project
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