summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2021-07-01 04:55:34 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-07-01 21:06:05 +0300
commit1d31aa172a4e6728918a06ee7f1d6bcb7507172c (patch)
tree5a9dcf432843110df5ec578940e9aeb1de2dc945
parentbe613b4025fa3894f3985283d5f2929161fae300 (diff)
downloadlinux-1d31aa172a4e6728918a06ee7f1d6bcb7507172c.tar.xz
seq_file: introduce seq_escape_mem()
Introduce seq_escape_mem() to allow users to pass additional parameters to string_escape_mem(). Link: https://lkml.kernel.org/r/20210504180819.73127-12-andriy.shevchenko@linux.intel.com Suggested-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: "J. Bruce Fields" <bfields@fieldses.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/seq_file.c25
-rw-r--r--include/linux/seq_file.h2
2 files changed, 27 insertions, 0 deletions
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
@@ -356,6 +356,31 @@ 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
* @s: string
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);