Hi, On 10/17/24 2:14 PM, André Almeida wrote: > Document mounting options for casefold support in tmpfs. > > Signed-off-by: André Almeida <andrealmeid@xxxxxxxxxx> > Reviewed-by: Gabriel Krisman Bertazi <krisman@xxxxxxx> > --- > Changes from v3: > - Rewrote note about "this doesn't enable casefold by default" (Krisman) > --- > Documentation/filesystems/tmpfs.rst | 24 ++++++++++++++++++++++++ > 1 file changed, 24 insertions(+) > > diff --git a/Documentation/filesystems/tmpfs.rst b/Documentation/filesystems/tmpfs.rst > index 56a26c843dbe964086503dda9b4e8066a1242d72..0385310f225808f55483413f2c69d3b6dc1b9913 100644 > --- a/Documentation/filesystems/tmpfs.rst > +++ b/Documentation/filesystems/tmpfs.rst > @@ -241,6 +241,28 @@ So 'mount -t tmpfs -o size=10G,nr_inodes=10k,mode=700 tmpfs /mytmpfs' > will give you tmpfs instance on /mytmpfs which can allocate 10GB > RAM/SWAP in 10240 inodes and it is only accessible by root. > > +tmpfs has the following mounting options for case-insensitive lookup support: > + > +================= ============================================================== > +casefold Enable casefold support at this mount point using the given > + argument as the encoding standard. Currently only UTF-8 > + encodings are supported. If no argument is used, it will load > + the latest UTF-8 encoding available. > +strict_encoding Enable strict encoding at this mount point (disabled by > + default). In this mode, the filesystem refuses to create file > + and directory with names containing invalid UTF-8 characters. > +================= ============================================================== > + > +This option doesn't render the entire filesystem case-insensitive. One needs to > +still set the casefold flag per directory, by flipping +F attribute in an empty I would say: flipping the +F attribute > +directory. Nevertheless, new directories will inherit the attribute. The > +mountpoint itself cannot be made case-insensitive. > + > +Example:: > + > + $ mount -t tmpfs -o casefold=utf8-12.1.0,strict_encoding fs_name /mytmpfs > + $ mount -t tmpfs -o casefold fs_name /mytmpfs > + > > :Author: > Christoph Rohland <cr@xxxxxxx>, 1.12.01 > @@ -250,3 +272,5 @@ RAM/SWAP in 10240 inodes and it is only accessible by root. > KOSAKI Motohiro, 16 Mar 2010 > :Updated: > Chris Down, 13 July 2020 > +:Updated: > + André Almeida, 23 Aug 2024 > Reviewed-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Thanks. -- ~Randy
