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authorLinus Torvalds <torvalds@linux-foundation.org>2023-11-07 22:46:31 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2023-11-07 22:46:31 +0300
commit7f851936a0ca4b231224ee296cba28f9b1bc555e (patch)
tree474b2147829e3cef0f5bfc157554c7f446e064c5 /fs/super.c
parentc9d01179e185f72b20af7e37aa4308f4c7ca7eeb (diff)
parent24e16e385f2272b1a9df51337a5c32d28a29c7ad (diff)
downloadlinux-7f851936a0ca4b231224ee296cba28f9b1bc555e.tar.xz
Merge tag 'ovl-update-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs
Pull overlayfs updates from Amir Goldstein: - Overlayfs aio cleanups and fixes Cleanups and minor fixes in preparation for factoring out of read/write passthrough code. - Overlayfs lock ordering changes Hold mnt_writers only throughout copy up instead of a long lived elevated refcount. - Add support for nesting overlayfs private xattrs There are cases where you want to use an overlayfs mount as a lowerdir for another overlayfs mount. For example, if the system rootfs is on overlayfs due to composefs, or to make it volatile (via tmpfs), then you cannot currently store a lowerdir on the rootfs, because the inner overlayfs will eat all the whiteouts and overlay xattrs. This means you can't e.g. store on the rootfs a prepared container image for use with overlayfs. This adds support for nesting of overlayfs mounts by escaping the problematic features and unescaping them when exposing to the overlayfs user. - Add new mount options for appending lowerdirs * tag 'ovl-update-6.7' of git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs: ovl: add support for appending lowerdirs one by one ovl: refactor layer parsing helpers ovl: store and show the user provided lowerdir mount option ovl: remove unused code in lowerdir param parsing ovl: Add documentation on nesting of overlayfs mounts ovl: Add an alternative type of whiteout ovl: Support escaped overlay.* xattrs ovl: Add OVL_XATTR_TRUSTED/USER_PREFIX_LEN macros ovl: Move xattr support to new xattrs.c file ovl: do not encode lower fh with upper sb_writers held ovl: do not open/llseek lower file with upper sb_writers held ovl: reorder ovl_want_write() after ovl_inode_lock() ovl: split ovl_want_write() into two helpers ovl: add helper ovl_file_modified() ovl: protect copying of realinode attributes to ovl inode ovl: punt write aio completion to workqueue ovl: propagate IOCB_APPEND flag on writes to realfile ovl: use simpler function to convert iocb to rw flags
Diffstat (limited to 'fs/super.c')
-rw-r--r--fs/super.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/super.c b/fs/super.c
index 77faad662739..076392396e72 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -2160,3 +2160,4 @@ int sb_init_dio_done_wq(struct super_block *sb)
destroy_workqueue(wq);
return 0;
}
+EXPORT_SYMBOL_GPL(sb_init_dio_done_wq);