kernel/linux.git/include/linux/dcache.h, branch linux-4.20.y

Merge tag 'ovl-update-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs

2018-08-22T01:19:09+00:00

Pull overlayfs updates from Miklos Szeredi: "This contains two new features: - Stack file operations: this allows removal of several hacks from the VFS, proper interaction of read-only open files with copy-up, possibility to implement fs modifying ioctls properly, and others. - Metadata only copy-up: when file is on lower layer and only metadata is modified (except size) then only copy up the metadata and continue to use the data from the lower file" * tag 'ovl-update-4.19' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs: (66 commits) ovl: Enable metadata only feature ovl: Do not do metacopy only for ioctl modifying file attr ovl: Do not do metadata only copy-up for truncate operation ovl: add helper to force data copy-up ovl: Check redirect on index as well ovl: Set redirect on upper inode when it is linked ovl: Set redirect on metacopy files upon rename ovl: Do not set dentry type ORIGIN for broken hardlinks ovl: Add an inode flag OVL_CONST_INO ovl: Treat metacopy dentries as type OVL_PATH_MERGE ovl: Check redirects for metacopy files ovl: Move some dir related ovl_lookup_single() code in else block ovl: Do not expose metacopy only dentry from d_real() ovl: Open file with data except for the case of fsync ovl: Add helper ovl_inode_realdata() ovl: Store lower data inode in ovl_inode ovl: Fix ovl_getattr() to get number of blocks from lower ovl: Add helper ovl_dentry_lowerdata() to get lower data dentry ovl: Copy up meta inode data from lowest data inode ovl: Modify ovl_lookup() and friends to lookup metacopy dentry ...

Merge branches 'work.misc' and 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2018-08-14T04:28:25+00:00

Pull misc vfs updates from Al Viro: "Misc cleanups from various folks all over the place I expected more fs/dcache.c cleanups this cycle, so that went into a separate branch. Said cleanups have missed the window, so in the hindsight it could've gone into work.misc instead. Decided not to cherry-pick, thus the 'work.dcache' branch" * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs: dcache: Use true and false for boolean values fold generic_readlink() into its only caller fs: shave 8 bytes off of struct inode fs: Add more kernel-doc to the produced documentation fs: Fix attr.c kernel-doc removed extra extern file_fdatawait_range * 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: kill dentry_update_name_case()

kill d_instantiate_no_diralias()

2018-08-02T03:18:53+00:00

The only user is fuse_create_new_entry(), and there it's used to mitigate the same mkdir/open-by-handle race as in nfs_mkdir(). The same solution applies - unhash the mkdir argument, then call d_splice_alias() and if that returns a reference to preexisting alias, dput() and report success. ->mkdir() argument left unhashed negative with the preexisting alias moved in the right place is just fine from the ->mkdir() callers point of view. Cc: Miklos Szeredi Signed-off-by: Al Viro

vfs: remove open_flags from d_real()

2018-07-18T13:44:44+00:00

Opening regular files on overlayfs is now handled via ovl_open(). Remove the now unused "open_flags" argument from d_op->d_real() and the d_real() helper. Signed-off-by: Miklos Szeredi

Revert "vfs: add flags to d_real()"

2018-07-18T13:44:43+00:00

This reverts commit 495e642939114478a5237a7d91661ba93b76f15a. No user of "flags" argument of d_real() remain. Signed-off-by: Miklos Szeredi

Revert "ovl: fix relatime for directories"

2018-07-18T13:44:43+00:00

This reverts commit cd91304e7190b4c4802f8e413ab2214b233e0260. Overlayfs no longer relies on the vfs correct atime handling. Signed-off-by: Miklos Szeredi

kill dentry_update_name_case()

2018-06-23T21:16:44+00:00

the last user is gone Spotted-by: Richard Weinberger Signed-off-by: Al Viro

do d_instantiate/unlock_new_inode combinations safely

2018-05-11T19:36:37+00:00

For anything NFS-exported we do _not_ want to unlock new inode before it has grown an alias; original set of fixes got the ordering right, but missed the nasty complication in case of lockdep being enabled - unlock_new_inode() does lockdep_annotate_inode_mutex_key(inode) which can only be done before anyone gets a chance to touch ->i_mutex. Unfortunately, flipping the order and doing unlock_new_inode() before d_instantiate() opens a window when mkdir can race with open-by-fhandle on a guessed fhandle, leading to multiple aliases for a directory inode and all the breakage that follows from that. Correct solution: a new primitive (d_instantiate_new()) combining these two in the right order - lockdep annotate, then d_instantiate(), then the rest of unlock_new_inode(). All combinations of d_instantiate() with unlock_new_inode() should be converted to that. Cc: stable@kernel.org # 2.6.29 and later Tested-by: Mike Marshall Reviewed-by: Andreas Dilger Signed-off-by: Al Viro

Merge branch 'old.dcache' into work.dcache

2018-04-04T04:40:19+00:00

take out orphan externs (empty_string/slash_string)

2018-03-29T19:07:46+00:00

Signed-off-by: Al Viro