user/sven/linux.git/fs/stat.c, branch v5.10.207

stat: fix inconsistency between struct stat and struct compat_stat

2022-04-27T11:53:54Z

[ Upstream commit 932aba1e169090357a77af18850a10c256b50819 ] struct stat (defined in arch/x86/include/uapi/asm/stat.h) has 32-bit st_dev and st_rdev; struct compat_stat (defined in arch/x86/include/asm/compat.h) has 16-bit st_dev and st_rdev followed by a 16-bit padding. This patch fixes struct compat_stat to match struct stat. [ Historical note: the old x86 'struct stat' did have that 16-bit field that the compat layer had kept around, but it was changes back in 2003 by "struct stat - support larger dev_t": https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git/commit/?id=e95b2065677fe32512a597a79db94b77b90c968d and back in those days, the x86_64 port was still new, and separate from the i386 code, and had already picked up the old version with a 16-bit st_dev field ] Note that we can't change compat_dev_t because it is used by compat_loop_info. Also, if the st_dev and st_rdev values are 32-bit, we don't have to use old_valid_dev to test if the value fits into them. This fixes -EOVERFLOW on filesystems that are on NVMe because NVMe uses the major number 259. Signed-off-by: Mikulas Patocka Cc: Andreas Schwab Cc: Matthew Wilcox Cc: Christoph Hellwig Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin

fs: fix reporting supported extra file attributes for statx()

2021-05-11T12:47:33Z

commit 5afa7e8b70d65819245fece61a65fd753b4aae33 upstream. statx(2) notes that any attribute that is not indicated as supported by stx_attributes_mask has no usable value. Commits 801e523796004 ("fs: move generic stat response attr handling to vfs_getattr_nosec") and 712b2698e4c02 ("fs/stat: Define DAX statx attribute") sets STATX_ATTR_AUTOMOUNT and STATX_ATTR_DAX, respectively, without setting stx_attributes_mask, which can cause xfstests generic/532 to fail. Fix this in the same way as commit 1b9598c8fb99 ("xfs: fix reporting supported extra file attributes for statx()") Fixes: 801e523796004 ("fs: move generic stat response attr handling to vfs_getattr_nosec") Fixes: 712b2698e4c02 ("fs/stat: Define DAX statx attribute") Cc: stable@kernel.org Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman

fs: remove KSTAT_QUERY_FLAGS

2020-09-27T02:55:05Z

KSTAT_QUERY_FLAGS expands to AT_STATX_SYNC_TYPE, which itself already is a mask. Remove the double name, especially given that the prefix is a little confusing vs the normal AT_* flags. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro

fs: remove vfs_stat_set_lookup_flags

2020-09-27T02:55:05Z

The function really obsfucates checking for valid flags and setting the lookup flags. The fact that it returns -EINVAL through and unsigned return value, which is then used as boolean really doesn't help either. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro

fs: move vfs_fstatat out of line

2020-09-27T02:55:05Z

This allows to keep vfs_statx static in fs/stat.c to prepare for the following changes. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro

fs: remove vfs_statx_fd

2020-09-27T02:55:05Z

vfs_statx_fd is only used to implement vfs_fstat. Remove vfs_statx_fd and just implement vfs_fstat directly. Signed-off-by: Christoph Hellwig Signed-off-by: Al Viro

Merge tag 'vfs-5.8-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

2020-06-03T02:45:12Z

Pull DAX updates part one from Darrick Wong: "After many years of LKML-wrangling about how to enable programs to query and influence the file data access mode (DAX) when a filesystem resides on storage devices such as persistent memory, Ira Weiny has emerged with a proposed set of standard behaviors that has not been shot down by anyone! We're more or less standardizing on the current XFS behavior and adapting ext4 to do the same. This is the first of a handful pull requests that will make ext4 and XFS present a consistent interface for user programs that care about DAX. We add a statx attribute that programs can check to see if DAX is enabled on a particular file. Then, we update the DAX documentation to spell out the user-visible behaviors that filesystems will guarantee (until the next storage industry shakeup). The on-disk inode flag has been in XFS for a few years now. Summary: - Clean up io_is_direct. - Add a new statx flag to indicate when file data access is being done via DAX (as opposed to the page cache). - Update the documentation for how system administrators and application programmers can take advantage of the (still experimental DAX) feature" Link: https://lore.kernel.org/lkml/20200505002016.1085071-1-ira.weiny@intel.com/ * tag 'vfs-5.8-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: Documentation/dax: Update Usage section fs/stat: Define DAX statx attribute fs: Remove unneeded IS_DAX() check in io_is_direct()

Merge tag 'for-5.8/io_uring-2020-06-01' of git://git.kernel.dk/linux-block

2020-06-02T22:42:50Z

Pull io_uring updates from Jens Axboe: "A relatively quiet round, mostly just fixes and code improvements. In particular: - Make statx just use the generic statx handler, instead of open coding it. We don't need that anymore, as we always call it async safe (Bijan) - Enable closing of the ring itself. Also fixes O_PATH closure (me) - Properly name completion members (me) - Batch reap of dead file registrations (me) - Allow IORING_OP_POLL with double waitqueues (me) - Add tee(2) support (Pavel) - Remove double off read (Pavel) - Fix overflow cancellations (Pavel) - Improve CQ timeouts (Pavel) - Async defer drain fixes (Pavel) - Add support for enabling/disabling notifications on a registered eventfd (Stefano) - Remove dead state parameter (Xiaoguang) - Disable SQPOLL submit on dying ctx (Xiaoguang) - Various code cleanups" * tag 'for-5.8/io_uring-2020-06-01' of git://git.kernel.dk/linux-block: (29 commits) io_uring: fix overflowed reqs cancellation io_uring: off timeouts based only on completions io_uring: move timeouts flushing to a helper statx: hide interfaces no longer used by io_uring io_uring: call statx directly statx: allow system call to be invoked from io_uring io_uring: add io_statx structure io_uring: get rid of manual punting in io_close io_uring: separate DRAIN flushing into a cold path io_uring: don't re-read sqe->off in timeout_prep() io_uring: simplify io_timeout locking io_uring: fix flush req->refs underflow io_uring: don't submit sqes when ctx->refs is dying io_uring: async task poll trigger cleanup io_uring: add tee(2) support splice: export do_tee() io_uring: don't repeat valid flag list io_uring: rename io_file_put() io_uring: remove req->needs_fixed_files io_uring: cleanup io_poll_remove_one() logic ...

statx: hide interfaces no longer used by io_uring

2020-05-26T22:48:06Z

The io_uring interfaces have been replaced by do_statx() and are no longer needed. Signed-off-by: Bijan Mottahedeh Signed-off-by: Jens Axboe

statx: allow system call to be invoked from io_uring

2020-05-26T22:48:06Z

This is a prepatory patch to allow io_uring to invoke statx directly. Signed-off-by: Bijan Mottahedeh Signed-off-by: Jens Axboe