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| author | Christian Brauner <brauner@kernel.org> | 2023-12-23 20:17:05 +0100 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2023-12-23 20:50:20 +0100 |
| commit | 7a18c0fff41ee60438ab2a1837d5b1a73ca2e2dd (patch) | |
| tree | d5da6a53b7bb039eaaf9e75720a24f4b0a955602 /fs/open.c | |
| parent | d9e5d31084b024734e64307521414ef0ae1d5333 (diff) | |
| parent | f567377e406c032fff0799bde4fdf4a977529b84 (diff) | |
| download | tip-7a18c0fff41ee60438ab2a1837d5b1a73ca2e2dd.tar.gz | |
Merge tag 'ovl-vfs-6.8' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs
Pull backing file updates from Amir Goldstein:
These patches essentially just lift some overlayfs code to common code.
The motivation is to reuse common stacking code for the FUSE passthrough
patches that I am shaping up for upstream. The FUSE passthrough work
will be coming in over the next cycles.
I have been testing those patches with my fuse-backing-fd development
branch for quite some time and I think both you and Miklos gave a
conceptual ACK to some version of this work.
* tag 'ovl-vfs-6.8' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs:
fs: factor out backing_file_mmap() helper
fs: factor out backing_file_splice_{read,write}() helpers
fs: factor out backing_file_{read,write}_iter() helpers
fs: prepare for stackable filesystems backing file helpers
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs/open.c')
| -rw-r--r-- | fs/open.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/fs/open.c b/fs/open.c index d877228d5939cc..a7505423743797 100644 --- a/fs/open.c +++ b/fs/open.c @@ -1184,44 +1184,6 @@ struct file *kernel_file_open(const struct path *path, int flags, } EXPORT_SYMBOL_GPL(kernel_file_open); -/** - * backing_file_open - open a backing file for kernel internal use - * @user_path: path that the user reuqested to open - * @flags: open flags - * @real_path: path of the backing file - * @cred: credentials for open - * - * Open a backing file for a stackable filesystem (e.g., overlayfs). - * @user_path may be on the stackable filesystem and @real_path on the - * underlying filesystem. In this case, we want to be able to return the - * @user_path of the stackable filesystem. This is done by embedding the - * returned file into a container structure that also stores the stacked - * file's path, which can be retrieved using backing_file_user_path(). - */ -struct file *backing_file_open(const struct path *user_path, int flags, - const struct path *real_path, - const struct cred *cred) -{ - struct file *f; - int error; - - f = alloc_empty_backing_file(flags, cred); - if (IS_ERR(f)) - return f; - - path_get(user_path); - *backing_file_user_path(f) = *user_path; - f->f_path = *real_path; - error = do_dentry_open(f, d_inode(real_path->dentry), NULL); - if (error) { - fput(f); - f = ERR_PTR(error); - } - - return f; -} -EXPORT_SYMBOL_GPL(backing_file_open); - #define WILL_CREATE(flags) (flags & (O_CREAT | __O_TMPFILE)) #define O_PATH_FLAGS (O_DIRECTORY | O_NOFOLLOW | O_PATH | O_CLOEXEC) |