Hi, This is V15 of overlayfs metadata only copy-up feature. These patches I have rebased on top of Miklos overlayfs-next tree's branch overlayfs-rorw. git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs-rorw Patches are also available here. https://github.com/rhvgoyal/linux/commits/metacopy-v15 I have run unionmount-testsuite and "./check -overlay -g quick" and that works. Only 4 overlay tests fail, which fail on vanilla kernel too. Changes from V14: - Rebased on top of latest overlayfs-rorw branch. - Took care of amir's comments on V14. - Started passing arguments to ovl_get_inode() in a structure, as argument list was getting too long. - Simplified ovl_fsync() and helper patches a bit. - unioned new field lowerdata with dir cache. - Renamed few helper functions with suffix _realdata instead of - Renamed ovl_rel_redirect() to ovl_need_absolute_redirect() and also now started calling it from ovl_set_redirect() instead of calling from ovl_reaname() directly. - Added argument padding to ovl_get_redirect_xattr() and reused this function in ovl_check_redirect(). - Added a helper funciton ovl_copy_up_with_data() to force full copy up (metadata plus data). Thanks Vivek Vivek Goyal (30): ovl: Pass argument to ovl_get_inode() in a structure ovl: Initialize ovl_inode->redirect in ovl_get_inode() ovl: Move the copy up helpers to copy_up.c ovl: Provide a mount option metacopy=on/off for metadata copyup ovl: During copy up, first copy up metadata and then data ovl: Copy up only metadata during copy up where it makes sense ovl: Add helper ovl_already_copied_up() ovl: A new xattr OVL_XATTR_METACOPY for file on upper ovl: Use out_err instead of out_nomem ovl: Modify ovl_lookup() and friends to lookup metacopy dentry ovl: Copy up meta inode data from lowest data inode ovl: Add helper ovl_dentry_lowerdata() to get lower data dentry ovl: Add an helper to get real data dentry ovl: Fix ovl_getattr() to get number of blocks from lower ovl: Store lower data inode in ovl_inode ovl: Add helper ovl_inode_real_data() ovl: Open file with data except for the case of fsync ovl: Do not expose metacopy only dentry from d_real() ovl: Move some dir related ovl_lookup_single() code in else block ovl: Check redirects for metacopy files ovl: Treat metacopy dentries as type OVL_PATH_MERGE ovl: Add an inode flag OVL_CONST_INO ovl: Do not set dentry type ORIGIN for broken hardlinks ovl: Set redirect on metacopy files upon rename ovl: Set redirect on upper inode when it is linked ovl: Check redirect on index as well ovl: Disbale metacopy for MAP_SHARED mmap() ovl: Do not do metadata only copy-up for truncate operation ovl: Do not do metacopy only for ioctl modifying file attr ovl: Enable metadata only feature Documentation/filesystems/overlayfs.txt | 30 +++- fs/overlayfs/Kconfig | 19 +++ fs/overlayfs/copy_up.c | 161 ++++++++++++++++----- fs/overlayfs/dir.c | 85 ++++++++--- fs/overlayfs/export.c | 8 +- fs/overlayfs/file.c | 53 ++++--- fs/overlayfs/inode.c | 131 ++++++++++------- fs/overlayfs/namei.c | 199 ++++++++++++++++--------- fs/overlayfs/overlayfs.h | 36 ++++- fs/overlayfs/ovl_entry.h | 16 +- fs/overlayfs/super.c | 60 +++++++- fs/overlayfs/util.c | 249 +++++++++++++++++++++++++++++++- 12 files changed, 829 insertions(+), 218 deletions(-) -- 2.13.6 -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
