user/sven/linux.git/include/linux/backing-file.h, branch v6.9.4Linux Kernel
https://git.stealer.net/cgit.cgi/user/sven/linux.git/atom?h=v6.9.42023-12-23T14:35:09Zfs: factor out backing_file_mmap() helper2023-12-23T14:35:09ZAmir Goldsteinamir73il@gmail.com2023-10-13T09:49:37Zurn:sha1:f567377e406c032fff0799bde4fdf4a977529b84
Assert that the file object is allocated in a backing_file container
so that file_user_path() could be used to display the user path and
not the backing file's path in /proc/<pid>/maps.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
fs: factor out backing_file_splice_{read,write}() helpers2023-12-23T14:35:09ZAmir Goldsteinamir73il@gmail.com2023-10-13T09:13:12Zurn:sha1:9b7e9e2f5d5c3d079ec46bc71b114012e362ea6e
There is not much in those helpers, but it makes sense to have them
logically next to the backing_file_{read,write}_iter() helpers as they
may grow more common logic in the future.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
fs: factor out backing_file_{read,write}_iter() helpers2023-12-23T14:35:09ZAmir Goldsteinamir73il@gmail.com2023-11-22T15:48:52Zurn:sha1:a6293b3e285cd0d7692141d7981a5f144f0e2f0b
Overlayfs submits files io to backing files on other filesystems.
Factor out some common helpers to perform io to backing files, into
fs/backing-file.c.
Suggested-by: Miklos Szeredi <miklos@szeredi.hu>
Link: https://lore.kernel.org/r/CAJfpeguhmZbjP3JLqtUy0AdWaHOkAPWeP827BBWwRFEAUgnUcQ@mail.gmail.com
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
fs: prepare for stackable filesystems backing file helpers2023-12-23T14:35:08ZAmir Goldsteinamir73il@gmail.com2023-10-02T14:19:46Zurn:sha1:f91a704f7161c2cf0fcd41fa9fbec4355b813fff
In preparation for factoring out some backing file io helpers from
overlayfs, move backing_file_open() into a new file fs/backing-file.c
and header.
Add a MAINTAINERS entry for stackable filesystems and add a Kconfig
FS_STACK which stackable filesystems need to select.
For now, the backing_file struct, the backing_file alloc/free functions
and the backing_file_real_path() accessor remain internal to file_table.c.
We may change that in the future.
Signed-off-by: Amir Goldstein <amir73il@gmail.com>