kernel.git/fs/coda/dir.c, branch linux-6.5.y

vfs: get rid of old '->iterate' directory operation

2023-08-06T13:08:35Z

All users now just use '->iterate_shared()', which only takes the directory inode lock for reading. Filesystems that never got convered to shared mode now instead use a wrapper that drops the lock, re-takes it in write mode, calls the old function, and then downgrades the lock back to read mode. This way the VFS layer and other callers no longer need to care about filesystems that never got converted to the modern era. The filesystems that use the new wrapper are ceph, coda, exfat, jfs, ntfs, ocfs2, overlayfs, and vboxsf. Honestly, several of them look like they really could just iterate their directories in shared mode and skip the wrapper entirely, but the point of this change is to not change semantics or fix filesystems that haven't been fixed in the last 7+ years, but to finally get rid of the dual iterators. Signed-off-by: Linus Torvalds Signed-off-by: Christian Brauner

fs: port ->permission() to pass mnt_idmap

2023-01-19T08:24:28Z

Convert to struct mnt_idmap. Last cycle we merged the necessary infrastructure in 256c8aed2b42 ("fs: introduce dedicated idmap type for mounts"). This is just the conversion to struct mnt_idmap. Currently we still pass around the plain namespace that was attached to a mount. This is in general pretty convenient but it makes it easy to conflate namespaces that are relevant on the filesystem with namespaces that are relevent on the mount level. Especially for non-vfs developers without detailed knowledge in this area this can be a potential source for bugs. Once the conversion to struct mnt_idmap is done all helpers down to the really low-level helpers will take a struct mnt_idmap argument instead of two namespace arguments. This way it becomes impossible to conflate the two eliminating the possibility of any bugs. All of the vfs and all filesystems only operate on struct mnt_idmap. Acked-by: Dave Chinner Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner (Microsoft)

fs: port ->rename() to pass mnt_idmap

2023-01-19T08:24:26Z

fs: port ->mkdir() to pass mnt_idmap

2023-01-19T08:24:26Z

fs: port ->symlink() to pass mnt_idmap

2023-01-19T08:24:25Z

fs: port ->create() to pass mnt_idmap

2023-01-19T08:24:25Z

coda: avoid hidden code duplication in rename

2021-11-09T18:02:51Z

We were actually fixing up the directory mtime in both branches after the negative dentry test, it was just that one branch was only flagging the directory inodes to refresh their attributes while the other branch used the optional optimization to set mtime to the current time and not go back to the Coda client. Link: https://lkml.kernel.org/r/20210908140308.18491-6-jaharkes@cs.cmu.edu Signed-off-by: Jan Harkes Cc: Alex Shi Cc: Jing Yangyang Cc: Xin Tan Cc: Xiyu Yang Cc: Zeal Robot Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

coda: avoid NULL pointer dereference from a bad inode

2021-11-09T18:02:51Z

Patch series "Coda updates for -next". The following patch series contains some fixes for the Coda kernel module I've had sitting around and were tested extensively in a development version of the Coda kernel module that lives outside of the main kernel. This patch (of 9): Avoid accessing coda_inode_info from a dentry with a bad inode. Link: https://lkml.kernel.org/r/20210908140308.18491-1-jaharkes@cs.cmu.edu Link: https://lkml.kernel.org/r/20210908140308.18491-2-jaharkes@cs.cmu.edu Signed-off-by: Jan Harkes Cc: Alex Shi Cc: Jing Yangyang Cc: Xin Tan Cc: Xiyu Yang Cc: Zeal Robot Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

fs: make helpers idmap mount aware

2021-01-24T13:27:20Z

Extend some inode methods with an additional user namespace argument. A filesystem that is aware of idmapped mounts will receive the user namespace the mount has been marked with. This can be used for additional permission checking and also to enable filesystems to translate between uids and gids if they need to. We have implemented all relevant helpers in earlier patches. As requested we simply extend the exisiting inode method instead of introducing new ones. This is a little more code churn but it's mostly mechanical and doesnt't leave us with additional inode methods. Link: https://lore.kernel.org/r/20210121131959.646623-25-christian.brauner@ubuntu.com Cc: Christoph Hellwig Cc: David Howells Cc: Al Viro Cc: linux-fsdevel@vger.kernel.org Reviewed-by: Christoph Hellwig Signed-off-by: Christian Brauner

coda: ftoc validity check integration

2019-07-17T02:23:23Z

This patch moves cfi check in coda_ftoc() instead of repeating it in the wild. Module size text data bss dec hex filename 28297 1040 700 30037 7555 fs/coda/coda.ko.before 28263 980 700 29943 74f7 fs/coda/coda.ko.after Link: http://lkml.kernel.org/r/a2c27663ec4547018c92d71c63b1dff4650b6546.1558117389.git.jaharkes@cs.cmu.edu Signed-off-by: Fabian Frederick Signed-off-by: Jan Harkes Cc: Arnd Bergmann Cc: Colin Ian King Cc: Dan Carpenter Cc: David Howells Cc: Mikko Rapeli Cc: Sam Protsenko Cc: Yann Droneaud Cc: Zhouyang Jia Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds