| Message ID | 20240905190252.461639-10-andrealmeid@igalia.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | tmpfs: Add case-insensitive support for tmpfs | expand |
André Almeida <andrealmeid@igalia.com> writes: > Document mounting options for casefold support in tmpfs. > > Signed-off-by: André Almeida <andrealmeid@igalia.com> > --- > Documentation/filesystems/tmpfs.rst | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/Documentation/filesystems/tmpfs.rst b/Documentation/filesystems/tmpfs.rst > index 56a26c843dbe..636afd3eaf48 100644 > --- a/Documentation/filesystems/tmpfs.rst > +++ b/Documentation/filesystems/tmpfs.rst > @@ -241,6 +241,27 @@ 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 lookups > support: lookups->lookup > + > +================= ============================================================== > +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. > +================= ============================================================== > + > +Note that this option doesn't enable casefold by default; I think this is fine as is. but if we need a new iteration, could you perhaps rephrase this to something like: 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 directory. Nevertheless, new directories will inherit the attribute. The mountpoint itself will cannot be made case-insensitive. > + > +Example:: > + > + $ mount -t tmpfs -o casefold=utf8-12.1.0,strict_enconding fs_name /mytmpfs strict_encoding > + $ mount -t tmpfs -o casefold fs_name /mytmpfs > + > > :Author: > Christoph Rohland <cr@sap.com>, 1.12.01 > @@ -250,3 +271,5 @@ 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
diff --git a/Documentation/filesystems/tmpfs.rst b/Documentation/filesystems/tmpfs.rst index 56a26c843dbe..636afd3eaf48 100644 --- a/Documentation/filesystems/tmpfs.rst +++ b/Documentation/filesystems/tmpfs.rst @@ -241,6 +241,27 @@ 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 lookups 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. +================= ============================================================== + +Note that this option doesn't enable casefold by default; one needs to set +casefold flag per directory, setting the +F attribute in an empty directory. New +directories within a casefolded one will inherit the flag. + +Example:: + + $ mount -t tmpfs -o casefold=utf8-12.1.0,strict_enconding fs_name /mytmpfs + $ mount -t tmpfs -o casefold fs_name /mytmpfs + :Author: Christoph Rohland <cr@sap.com>, 1.12.01 @@ -250,3 +271,5 @@ 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
Document mounting options for casefold support in tmpfs. Signed-off-by: André Almeida <andrealmeid@igalia.com> --- Documentation/filesystems/tmpfs.rst | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+)