debugfs: Add debugfs_create_u64()
I went to use this the other day, only to find it didn't exist. It's a straight copy of the debugfs u32 code, then s/u32/u64/. A quick test shows it seems to be working. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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@ -179,6 +179,48 @@ struct dentry *debugfs_create_u32(const char *name, mode_t mode,
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}
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EXPORT_SYMBOL_GPL(debugfs_create_u32);
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static void debugfs_u64_set(void *data, u64 val)
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{
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*(u64 *)data = val;
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}
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static u64 debugfs_u64_get(void *data)
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{
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return *(u64 *)data;
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}
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DEFINE_SIMPLE_ATTRIBUTE(fops_u64, debugfs_u64_get, debugfs_u64_set, "%llu\n");
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/**
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* debugfs_create_u64 - create a debugfs file that is used to read and write an unsigned 64-bit value
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* @name: a pointer to a string containing the name of the file to create.
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* @mode: the permission that the file should have
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* @parent: a pointer to the parent dentry for this file. This should be a
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* directory dentry if set. If this parameter is %NULL, then the
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* file will be created in the root of the debugfs filesystem.
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* @value: a pointer to the variable that the file should read to and write
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* from.
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*
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* This function creates a file in debugfs with the given name that
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* contains the value of the variable @value. If the @mode variable is so
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* set, it can be read from, and written to.
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*
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* This function will return a pointer to a dentry if it succeeds. This
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* pointer must be passed to the debugfs_remove() function when the file is
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* to be removed (no automatic cleanup happens if your module is unloaded,
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* you are responsible here.) If an error occurs, %NULL will be returned.
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*
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* If debugfs is not enabled in the kernel, the value -%ENODEV will be
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* returned. It is not wise to check for this value, but rather, check for
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* %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
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* code.
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*/
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struct dentry *debugfs_create_u64(const char *name, mode_t mode,
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struct dentry *parent, u64 *value)
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{
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return debugfs_create_file(name, mode, parent, value, &fops_u64);
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}
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EXPORT_SYMBOL_GPL(debugfs_create_u64);
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static ssize_t read_file_bool(struct file *file, char __user *user_buf,
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size_t count, loff_t *ppos)
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{
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@ -44,6 +44,8 @@ struct dentry *debugfs_create_u16(const char *name, mode_t mode,
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struct dentry *parent, u16 *value);
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struct dentry *debugfs_create_u32(const char *name, mode_t mode,
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struct dentry *parent, u32 *value);
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struct dentry *debugfs_create_u64(const char *name, mode_t mode,
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struct dentry *parent, u64 *value);
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struct dentry *debugfs_create_bool(const char *name, mode_t mode,
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struct dentry *parent, u32 *value);
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@ -104,6 +106,13 @@ static inline struct dentry *debugfs_create_u32(const char *name, mode_t mode,
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_u64(const char *name, mode_t mode,
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struct dentry *parent,
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u64 *value)
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{
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return ERR_PTR(-ENODEV);
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}
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static inline struct dentry *debugfs_create_bool(const char *name, mode_t mode,
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struct dentry *parent,
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u32 *value)
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