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authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-11 06:06:01 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-11 06:06:01 +0200
commit2e756758e5cb4ea29cba5865d00fad476ce94a93 (patch)
tree69bf2540a6d458bddb08d01f3aa8e5d0a269635d /fs/unicode
parentMerge tag 'afs-next-20190628' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff)
parentext4: fix coverity warning on error path of filename setup (diff)
downloadlinux-2e756758e5cb4ea29cba5865d00fad476ce94a93.tar.xz
linux-2e756758e5cb4ea29cba5865d00fad476ce94a93.zip
Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 updates from Ted Ts'o: "Many bug fixes and cleanups, and an optimization for case-insensitive lookups" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: fix coverity warning on error path of filename setup ext4: replace ktype default_attrs with default_groups ext4: rename htree_inline_dir_to_tree() to ext4_inlinedir_to_tree() ext4: refactor initialize_dirent_tail() ext4: rename "dirent_csum" functions to use "dirblock" ext4: allow directory holes jbd2: drop declaration of journal_sync_buffer() ext4: use jbd2_inode dirty range scoping jbd2: introduce jbd2_inode dirty range scoping mm: add filemap_fdatawait_range_keep_errors() ext4: remove redundant assignment to node ext4: optimize case-insensitive lookups ext4: make __ext4_get_inode_loc plug ext4: clean up kerneldoc warnigns when building with W=1 ext4: only set project inherit bit for directory ext4: enforce the immutable flag on open files ext4: don't allow any modifications to an immutable file jbd2: fix typo in comment of journal_submit_inode_data_buffers jbd2: fix some print format mistakes ext4: gracefully handle ext4_break_layouts() failure during truncate
Diffstat (limited to 'fs/unicode')
-rw-r--r--fs/unicode/utf8-core.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/fs/unicode/utf8-core.c b/fs/unicode/utf8-core.c
index 6afab4fdce90..71ca4d047d65 100644
--- a/fs/unicode/utf8-core.c
+++ b/fs/unicode/utf8-core.c
@@ -73,6 +73,34 @@ int utf8_strncasecmp(const struct unicode_map *um,
}
EXPORT_SYMBOL(utf8_strncasecmp);
+/* String cf is expected to be a valid UTF-8 casefolded
+ * string.
+ */
+int utf8_strncasecmp_folded(const struct unicode_map *um,
+ const struct qstr *cf,
+ const struct qstr *s1)
+{
+ const struct utf8data *data = utf8nfdicf(um->version);
+ struct utf8cursor cur1;
+ int c1, c2;
+ int i = 0;
+
+ if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
+ return -EINVAL;
+
+ do {
+ c1 = utf8byte(&cur1);
+ c2 = cf->name[i++];
+ if (c1 < 0)
+ return -EINVAL;
+ if (c1 != c2)
+ return 1;
+ } while (c1);
+
+ return 0;
+}
+EXPORT_SYMBOL(utf8_strncasecmp_folded);
+
int utf8_casefold(const struct unicode_map *um, const struct qstr *str,
unsigned char *dest, size_t dlen)
{