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linux/fs/backing-file.c

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fs: prepare for stackable filesystems backing file helpers 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>
2023-10-02 17:19:46 +03:00
fs: factor out backing_file_{read,write}_iter() helpers 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>
2023-11-22 17:48:52 +02:00
fs: prepare for stackable filesystems backing file helpers 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>
2023-10-02 17:19:46 +03:00
fs: factor out backing_file_splice_{read,write}() helpers 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>
2023-10-13 12:13:12 +03:00
fs: factor out backing_file_mmap() helper 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>
2023-10-13 12:49:37 +03:00
fs: prepare for stackable filesystems backing file helpers 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>
2023-10-02 17:19:46 +03:00
fs: factor out backing_file_{read,write}_iter() helpers 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>
2023-11-22 17:48:52 +02:00
ovl: implement tmpfile Combine inode creation with opening a file. There are six separate objects that are being set up: the backing inode, dentry and file, and the overlay inode, dentry and file. Cleanup in case of an error is a bit of a challenge and is difficult to test, so careful review is needed. All tmpfile testcases except generic/509 now run/pass, and no regressions are observed with full xfstests. Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Reviewed-by: Amir Goldstein <amir73il@gmail.com>
2024-05-02 20:35:57 +02:00
fs: factor out backing_file_{read,write}_iter() helpers 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>
2023-11-22 17:48:52 +02:00
fs: pass offset and result to backing_file end_write() callback This is needed for extending fuse inode size after fuse passthrough write. Suggested-by: Miklos Szeredi <miklos@szeredi.hu> Link: https://lore.kernel.org/linux-fsdevel/CAJfpegs=cvZ_NYy6Q_D42XhYS=Sjj5poM1b5TzXzOVvX=R36aA@mail.gmail.com/ Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-10-14 21:27:58 +02:00
fs: factor out backing_file_{read,write}_iter() helpers 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>
2023-11-22 17:48:52 +02:00
fs: pass offset and result to backing_file end_write() callback This is needed for extending fuse inode size after fuse passthrough write. Suggested-by: Miklos Szeredi <miklos@szeredi.hu> Link: https://lore.kernel.org/linux-fsdevel/CAJfpegs=cvZ_NYy6Q_D42XhYS=Sjj5poM1b5TzXzOVvX=R36aA@mail.gmail.com/ Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-10-14 21:27:58 +02:00
fs: factor out backing_file_{read,write}_iter() helpers 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>
2023-11-22 17:48:52 +02:00
fs: pass offset and result to backing_file end_write() callback This is needed for extending fuse inode size after fuse passthrough write. Suggested-by: Miklos Szeredi <miklos@szeredi.hu> Link: https://lore.kernel.org/linux-fsdevel/CAJfpegs=cvZ_NYy6Q_D42XhYS=Sjj5poM1b5TzXzOVvX=R36aA@mail.gmail.com/ Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-10-14 21:27:58 +02:00
fs: factor out backing_file_{read,write}_iter() helpers 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>
2023-11-22 17:48:52 +02:00
fs: factor out backing_file_splice_{read,write}() helpers 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>
2023-10-13 12:13:12 +03:00
backing-file: convert to using fops->splice_write Filesystems may define their own splice write. Therefore, use the file fops instead of invoking iter_file_splice_write() directly. Signed-off-by: Ed Tsai <ed.tsai@mediatek.com> Link: https://lore.kernel.org/r/20240708072208.25244-1-ed.tsai@mediatek.com Fixes: 5ca73468612d ("fuse: implement splice read/write passthrough") Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-07-08 15:22:06 +08:00
fs: factor out backing_file_splice_{read,write}() helpers 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>
2023-10-13 12:13:12 +03:00
backing-file: convert to using fops->splice_write Filesystems may define their own splice write. Therefore, use the file fops instead of invoking iter_file_splice_write() directly. Signed-off-by: Ed Tsai <ed.tsai@mediatek.com> Link: https://lore.kernel.org/r/20240708072208.25244-1-ed.tsai@mediatek.com Fixes: 5ca73468612d ("fuse: implement splice read/write passthrough") Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-07-08 15:22:06 +08:00
fs: factor out backing_file_splice_{read,write}() helpers 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>
2023-10-13 12:13:12 +03:00
fs: pass offset and result to backing_file end_write() callback This is needed for extending fuse inode size after fuse passthrough write. Suggested-by: Miklos Szeredi <miklos@szeredi.hu> Link: https://lore.kernel.org/linux-fsdevel/CAJfpegs=cvZ_NYy6Q_D42XhYS=Sjj5poM1b5TzXzOVvX=R36aA@mail.gmail.com/ Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
2024-10-14 21:27:58 +02:00
fs: factor out backing_file_splice_{read,write}() helpers 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>
2023-10-13 12:13:12 +03:00
fs: factor out backing_file_mmap() helper 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>
2023-10-13 12:49:37 +03:00
fs: factor out backing_file_{read,write}_iter() helpers 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>
2023-11-22 17:48:52 +02:00
fs: Use KMEM_CACHE instead of kmem_cache_create commit 0a31bd5f2bbb ("KMEM_CACHE(): simplify slab cache creation") introduces a new macro. Use the new KMEM_CACHE() macro instead of direct kmem_cache_create to simplify the creation of SLAB caches. Signed-off-by: Kunwu Chan <chentao@kylinos.cn> Link: https://lore.kernel.org/r/20240131070941.135178-1-chentao@kylinos.cn Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Christian Brauner <brauner@kernel.org>
2024-01-31 15:09:41 +08:00
fs: factor out backing_file_{read,write}_iter() helpers 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>
2023-11-22 17:48:52 +02:00