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authorLinus Torvalds <torvalds@linux-foundation.org>2023-10-15 18:55:51 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-10-15 18:55:51 +0300
commit19fd4a91ddeec20f9971a06f6328558c392ad66a (patch)
treea13bce5a020e125fbc8444db5dba81d54561d7a6 /Documentation
parentf8bf101b3b1171923a011a47923a93f4b22e6cb0 (diff)
parentbeae836e9c61ee039e367a94b14f7fea08f0ad4c (diff)
downloadlinux-19fd4a91ddeec20f9971a06f6328558c392ad66a.tar.xz
Merge tag 'ovl-fixes-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs
Pull overlayfs fixes from Amir Goldstein: - Various fixes for regressions due to conversion to new mount api in v6.5 - Disable a new mount option syntax (append lowerdir) that was added in v6.5 because we plan to add a different lowerdir append syntax in v6.7 * tag 'ovl-fixes-6.6-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs: ovl: temporarily disable appending lowedirs ovl: fix regression in showing lowerdir mount option ovl: fix regression in parsing of mount options with escaped comma fs: factor out vfs_parse_monolithic_sep() helper
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/filesystems/overlayfs.rst12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/filesystems/overlayfs.rst b/Documentation/filesystems/overlayfs.rst
index cdefbe73d85c..5b93268e400f 100644
--- a/Documentation/filesystems/overlayfs.rst
+++ b/Documentation/filesystems/overlayfs.rst
@@ -339,6 +339,18 @@ The specified lower directories will be stacked beginning from the
rightmost one and going left. In the above example lower1 will be the
top, lower2 the middle and lower3 the bottom layer.
+Note: directory names containing colons can be provided as lower layer by
+escaping the colons with a single backslash. For example:
+
+ mount -t overlay overlay -olowerdir=/a\:lower\:\:dir /merged
+
+Since kernel version v6.5, directory names containing colons can also
+be provided as lower layer using the fsconfig syscall from new mount api:
+
+ fsconfig(fs_fd, FSCONFIG_SET_STRING, "lowerdir", "/a:lower::dir", 0);
+
+In the latter case, colons in lower layer directory names will be escaped
+as an octal characters (\072) when displayed in /proc/self/mountinfo.
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