From 85482241f208975fcaba8c1892d2cfc95f6ef5aa Mon Sep 17 00:00:00 2001 From: Konstantin Komarov Date: Thu, 3 Sep 2026 10:44:29 +0200 Subject: [PATCH] fs/ntfs3: document ads, nocase, and delalloc The 'ads', 'nocase', and 'delalloc' mount options are accepted by the parser and reported by ntfs_show_options(), but were never added to the mount option table in the documentation. Document them. Signed-off-by: Konstantin Komarov --- Documentation/filesystems/ntfs3.rst | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/Documentation/filesystems/ntfs3.rst b/Documentation/filesystems/ntfs3.rst index 2b86a9b3a6de..e1d86dcc3316 100644 --- a/Documentation/filesystems/ntfs3.rst +++ b/Documentation/filesystems/ntfs3.rst @@ -109,6 +109,29 @@ this table marked with no it means default is without **no**. Kernel. Not to be confused with NTFS ACLs. The option specified as acl enables support for POSIX ACLs. + * - ads + - Enable access to alternate data streams, i.e. named $DATA + attributes. A stream is addressed by appending a colon and the + stream name to the file name. Reading the pseudo-stream + ``query_streams`` returns the names of the streams attached to a + file, one per line:: + + cat file:query_streams # list stream names + cat file:ads1 # read a stream + touch file:ads2 # create a stream on an existing file + rm file:ads1 # remove a stream + + Creating a file together with a stream in a single call, and + renaming a stream, are not supported. Enabled by default. + + * - nocase + - Perform file name lookups case-insensitively. + + * - delalloc + - Delay block allocation for buffered writes until writeback, + rather than allocating as each write is issued. This lets the + driver allocate larger contiguous runs and reduces fragmentation. + Todo list ========= - Full journaling support over JBD. Currently journal replaying is supported