Messages in this thread | | | Date | Thu, 3 Apr 2014 15:49:24 +0200 | From | Miklos Szeredi <> | Subject | [GIT PULL] renameat2 syscall |
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Hi Linus,
I think I addressed all issues with this series:
- i_mutex on non-directories being moved needed for NFS - split ext4_rename() into cross-rename/plain-rename functions - split i_op->rename(), it's certainly easier to maintain pre merge, then we'll see - xfstests validation added - whiteout patch added (but not in this pull)
Please pull from:
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git cross-rename
Thanks, Miklos ---
This series adds a new syscall, renameat2(), which is the same as renameat() but with a flags argument.
The purpose of extending rename is to add cross-rename, a symmetric variant of rename, which exchanges the two files. This allows interesting things, which were not possible before, for example atomically replacing a directory tree with a symlink, etc... This also allows overlayfs and friends to operate on whiteouts atomically.
Andy Lutomirski also suggested a "noreplace" flag, which disables the overwriting behavior of rename.
These two flags, RENAME_EXCHANGE and RENAME_NOREPLACE are only implemented for ext4 as an example and for testing. ---
J. Bruce Fields (1): vfs: lock_two_nondirectories: allow directory args
Miklos Szeredi (11): vfs: add d_is_dir() vfs: rename: move d_move() up vfs: rename: use common code for dir and non-dir vfs: add renameat2 syscall vfs: add RENAME_NOREPLACE flag security: add flags to rename hooks vfs: add cross-rename ext4: rename: create ext4_renament structure for local vars ext4: rename: move EMLINK check up ext4: rename: split out helper functions ext4: add cross rename support
--- Documentation/filesystems/Locking | 6 +- Documentation/filesystems/vfs.txt | 16 + arch/x86/syscalls/syscall_64.tbl | 1 + .../lustre/lustre/include/linux/lustre_compat25.h | 4 +- drivers/staging/lustre/lustre/lvfs/lvfs_linux.c | 2 +- fs/cachefiles/namei.c | 4 +- fs/dcache.c | 50 ++- fs/ecryptfs/inode.c | 2 +- fs/ext4/namei.c | 480 +++++++++++++++------ fs/inode.c | 25 +- fs/namei.c | 315 +++++++------- fs/nfsd/vfs.c | 2 +- include/linux/dcache.h | 8 +- include/linux/fs.h | 4 +- include/linux/security.h | 12 +- include/uapi/linux/fs.h | 3 + security/security.c | 22 +- 17 files changed, 643 insertions(+), 313 deletions(-)
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