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| author | Miklos Szeredi <mszeredi@suse.cz> | 2014-12-13 00:59:52 +0100 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@suse.cz> | 2014-12-13 00:59:52 +0100 |
| commit | a78d9f0d5d5ca9054703376c7c23c901807ddd87 (patch) | |
| tree | 956a4d1e7517b9ead6f6f101dbfc1f344bec87fd /Documentation | |
| parent | ovl: make upperdir optional (diff) | |
| download | linux-a78d9f0d5d5ca9054703376c7c23c901807ddd87.tar.xz linux-a78d9f0d5d5ca9054703376c7c23c901807ddd87.zip | |
ovl: support multiple lower layers
Allow "lowerdir=" option to contain multiple lower directories separated by
a colon (e.g. "lowerdir=/bin:/usr/bin"). Colon characters in filenames can
be escaped with a backslash.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/filesystems/overlayfs.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/filesystems/overlayfs.txt b/Documentation/filesystems/overlayfs.txt index a27c950ece61..b37092886dcc 100644 --- a/Documentation/filesystems/overlayfs.txt +++ b/Documentation/filesystems/overlayfs.txt @@ -159,6 +159,18 @@ overlay filesystem (though an operation on the name of the file such as rename or unlink will of course be noticed and handled). +Multiple lower layers +--------------------- + +Multiple lower layers can now be given using the the colon (":") as a +separator character between the directory names. For example: + + mount -t overlay overlay -olowerdir=/lower1:/lower2:/lower3 /merged + +As the example shows, "upperdir=" and "workdir=" may be omitted. In that case +the overlay will be read-only. + + Non-standard behavior --------------------- |