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Message-ID: <AANLkTim7q5L9v5uFx9NB2Eai48WCTi5sSSx9yFbQgszi@mail.gmail.com> Date: Tue, 22 Mar 2011 19:12:06 -0700 From: Valerie Aurora <valerie.aurora@...il.com> To: linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Cc: viro@...iv.linux.org.uk Subject: Re: [PATCH 00/74] Union mounts version something or other And I cc'd linux@...r.kernel.org on all the patches instead of linux-kernel@...r.kernel.org - guess I'm really out of the kernel business now! Anyway, if you want your replies to go to lkml, you'll have to hand edit the cc list. -VAL On Tue, Mar 22, 2011 at 6:58 PM, Valerie Aurora <valerie.aurora@...il.com> wrote: > Hi union mounts fans(?), > > Here's my current union mounts patch set, against 2.6.36-rc5. I'm > busy with other things[1] and unlikely to put in significant work on > union mounts in the next year. I'm happy to answer questions from > anyone else working on them. > > As always, git trees for the kernel, util-linux, and e2fsprogs, lots > of documentation, and LWN articles describing the various problems > unioning file systems will encounter are here: > > http://valerieaurora.org/union/ > > The devkit linked to from that page includes my Usermode Linux testing > environment, including root file system image. The README tells you > how to run the test suite automatically (yes, an automated test suite > - with Makefile and version control and comments and stuff!). > > I took a quick look at the current overlayfs patch set, and it's > small, clean, and easy to understand. If it does what people need, I > say ship it. > > Thanks to everyone who reviewed and submitted patches for union mounts! > > -VAL > > [1] http://adainitiative.org > > --- > > Felix Fietkau (2): > whiteout: jffs2 whiteout support > fallthru: jffs2 fallthru support > > Jan Blunck (9): > VFS: Make lookup_hash() return a struct path > autofs4: Save autofs trigger's vfsmount in super block info > whiteout/NFSD: Don't return information about whiteouts to userspace > whiteout: Add vfs_whiteout() and whiteout inode operation > whiteout: Allow removal of a directory with whiteouts > whiteout: tmpfs whiteout support > union-mount: Introduce MNT_UNION and MS_UNION flags > union-mount: Free union stack on removal of topmost dentry from > dcache > union-mount: Create IS_MNT_UNION() > > Valerie Aurora (63): > VFS: Comment follow_mount() and friends > Documentation: Fix trivial typo in filesystems/sharedsubtree.txt > whiteout: Define opaque inode flags and operations > ext2: Add ext2_dirent_in_use() > ext2: Split ext2_add_entry() from ext2_add_link() > whiteout: ext2 whiteout support > fallthru: Basic fallthru definitions > fallthru: ext2 fallthru support > fallthru: tmpfs fallthru support > VFS: Add hard read-only users count to superblock > VFS: Make clone_mnt()/copy_tree()/collect_mounts() return errors > VFS: Add CL_NO_SHARED flag to clone_mnt()/copy_tree() > VFS: Add CL_NO_SLAVE flag to clone_mnt()/copy_tree() > VFS: Add CL_MAKE_HARD_READONLY flag to clone_mnt()/copy_tree() > union-mount: Union mounts documentation > union-mount: Add CONFIG_UNION_MOUNT option > union-mount: Create union_stack structure > union-mount: Add two superblock fields for union mounts > union-mount: Add union_alloc() > union-mount: Add union_find_dir() > union-mount: Create d_free_unions() > union-mount: Create union_add_dir() > union-mount: Add union_create_topmost_dir() > union-mount: Create needs_lookup_union() > union-mount: Create check_topmost_union_mnt() > union-mount: Add clone_union_tree() and put_union_sb() > union-mount: Create build_root_union() > union-mount: Create prepare_mnt_union() and cleanup_mnt_union() > union-mount: Prevent improper union-related remounts > union-mount: Prevent topmost file system from being mounted elsewhere > union-mount: Prevent bind mounts of union mounts > union-mount: Implement union mount > union-mount: Temporarily disable some syscalls > union-mount: Basic infrastructure of __lookup_union() > union-mount: Process negative dentries in __lookup_union() > union-mount: Return files found in lower layers in __lookup_union() > union-mount: Build union stack in __lookup_union() > union-mount: Follow mount in __lookup_union() > union-mount: Add lookup_union() > union-mount: Add do_lookup_union() wrapper for __lookup_union() > union-mount: Call union lookup functions in lookup path > union-mount: Create whiteout on unlink() > union-mount: Create whiteout on rmdir() > union-mount: Set opaque flag on new directories in unioned file > systems > union-mount: Copy up directory entries on first readdir() > union-mount: Add generic_readdir_fallthru() helper > fallthru: ext2 support for lookup of d_type/d_ino in fallthrus > fallthru: tmpfs support for lookup of d_type/d_ino in fallthrus > fallthru: jffs2 support for lookup of d_type/d_ino in fallthrus > VFS: Split inode_permission() and create path_permission() > VFS: Create user_path_nd() to lookup both parent and target > union-mount: In-kernel file copyup routines > union-mount: Implement union-aware access()/faccessat() > union-mount: Implement union-aware link() > union-mount: Implement union-aware rename() > union-mount: Implement union-aware writable open() > union-mount: Implement union-aware chown() > union-mount: Implement union-aware truncate() > union-mount: Implement union-aware chmod()/fchmodat() > union-mount: Implement union-aware lchown() > union-mount: Implement union-aware utimensat() > union-mount: Implement union-aware setxattr() > union-mount: Implement union-aware lsetxattr() > > Documentation/filesystems/sharedsubtree.txt | 4 +- > Documentation/filesystems/union-mounts.txt | 751 +++++++++++++++++++++++++ > Documentation/filesystems/vfs.txt | 16 +- > fs/Kconfig | 13 + > fs/Makefile | 1 + > fs/autofs4/autofs_i.h | 1 + > fs/autofs4/init.c | 11 +- > fs/autofs4/root.c | 6 + > fs/compat.c | 9 + > fs/dcache.c | 32 +- > fs/ext2/dir.c | 116 ++++- > fs/ext2/ext2.h | 3 + > fs/ext2/inode.c | 11 +- > fs/ext2/namei.c | 85 +++- > fs/ext2/super.c | 6 + > fs/jffs2/dir.c | 117 ++++- > fs/jffs2/fs.c | 4 + > fs/jffs2/super.c | 2 +- > fs/libfs.c | 20 +- > fs/namei.c | 807 ++++++++++++++++++++++++--- > fs/namespace.c | 394 +++++++++++-- > fs/nfsd/nfs3xdr.c | 5 + > fs/nfsd/nfs4xdr.c | 5 + > fs/nfsd/nfsxdr.c | 4 + > fs/open.c | 116 ++++- > fs/pnode.c | 5 +- > fs/pnode.h | 3 + > fs/readdir.c | 18 + > fs/super.c | 9 + > fs/union.c | 714 ++++++++++++++++++++++++ > fs/union.h | 105 ++++ > fs/utimes.c | 14 +- > fs/xattr.c | 65 ++- > include/linux/dcache.h | 37 ++- > include/linux/ext2_fs.h | 8 + > include/linux/fs.h | 45 ++ > include/linux/jffs2.h | 8 + > include/linux/mount.h | 4 + > include/linux/namei.h | 2 + > kernel/audit_tree.c | 10 +- > mm/shmem.c | 193 ++++++- > 41 files changed, 3551 insertions(+), 228 deletions(-) > create mode 100644 Documentation/filesystems/union-mounts.txt > create mode 100644 fs/union.c > create mode 100644 fs/union.h > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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