[PATCH v2 11/14] seq_file: Introduce seq_escape_mem()
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: 2021-05-04 10:27:10
Also in:
linux-fsdevel, lkml
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
Introduce seq_escape_mem() to allow users to pass additional parameters to string_escape_mem(). Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- fs/seq_file.c | 25 +++++++++++++++++++++++++ include/linux/seq_file.h | 2 ++ 2 files changed, 27 insertions(+)
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 5059248f2d64..532cac2eae0f 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c@@ -355,6 +355,31 @@ int seq_release(struct inode *inode, struct file *file) } EXPORT_SYMBOL(seq_release); +/** + * seq_escape_mem - print data into buffer, escaping some characters + * @m: target buffer + * @src: source buffer + * @len: size of source buffer + * @flags: flags to pass to string_escape_mem() + * @esc: set of characters that need escaping + * + * Puts data into buffer, replacing each occurrence of character from + * given class (defined by @flags and @esc) with printable escaped sequence. + * + * Use seq_has_overflowed() to check for errors. + */ +void seq_escape_mem(struct seq_file *m, const char *src, size_t len, + unsigned int flags, const char *esc) +{ + char *buf; + size_t size = seq_get_buf(m, &buf); + int ret; + + ret = string_escape_mem(src, len, buf, size, flags, esc); + seq_commit(m, ret < size ? ret : -1); +} +EXPORT_SYMBOL(seq_escape_mem); + /** * seq_escape - print string into buffer, escaping some characters * @m: target buffer
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 723b1fa1177e..6de442182784 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h@@ -126,6 +126,8 @@ void seq_put_decimal_ll(struct seq_file *m, const char *delimiter, long long num void seq_put_hex_ll(struct seq_file *m, const char *delimiter, unsigned long long v, unsigned int width); +void seq_escape_mem(struct seq_file *m, const char *src, size_t len, + unsigned int flags, const char *esc); void seq_escape(struct seq_file *m, const char *s, const char *esc); void seq_escape_mem_ascii(struct seq_file *m, const char *src, size_t isz);
--
2.30.2