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lib/string_helpers: Introduce parse_int_array_user()

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Add new helper function to allow for splitting specified user string
into a sequence of integers. Internally it makes use of get_options() so
the returned sequence contains the integers extracted plus an additional
element that begins the sequence and specifies the integers count.

Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20220904102840.862395-2-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cezary Rojewski 2022-09-04 12:28:39 +02:00 • committed by Mark Brown
parent 376be51caf
commit f0b933236e
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2 changed files with 46 additions and 0 deletions
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include/linux/string_helpers.h
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@ -21,6 +21,8 @@ enum string_size_units {
void string_get_size(u64 size, u64 blk_size, enum string_size_units units,
char *buf, int len);
int parse_int_array_user(const char __user *from, size_t count, int **array);
#define UNESCAPE_SPACE BIT(0)
#define UNESCAPE_OCTAL BIT(1)
#define UNESCAPE_HEX BIT(2)