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authorLinus Torvalds <torvalds@linux-foundation.org>2020-06-03 00:42:50 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-03 00:42:50 +0200
commit1ee08de1e234d95b5b4f866878b72fceb5372904 (patch)
treec6c346f8d25cf309ce5585cb02af6c75b6ca9b75 /fs/stat.c
parentMerge tag 'for-5.8/drivers-2020-06-01' of git://git.kernel.dk/linux-block (diff)
parentio_uring: fix overflowed reqs cancellation (diff)
downloadlinux-1ee08de1e234d95b5b4f866878b72fceb5372904.tar.xz
linux-1ee08de1e234d95b5b4f866878b72fceb5372904.zip
Merge tag 'for-5.8/io_uring-2020-06-01' of git://git.kernel.dk/linux-block
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 ...
Diffstat (limited to 'fs/stat.c')
-rw-r--r--fs/stat.c37
1 files changed, 22 insertions, 15 deletions
diff --git a/fs/stat.c b/fs/stat.c
index b9faa6cafafe..b86a5c338133 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -153,7 +153,8 @@ int vfs_statx_fd(unsigned int fd, struct kstat *stat,
}
EXPORT_SYMBOL(vfs_statx_fd);
-inline unsigned vfs_stat_set_lookup_flags(unsigned *lookup_flags, int flags)
+static inline unsigned vfs_stat_set_lookup_flags(unsigned *lookup_flags,
+ int flags)
{
if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
AT_EMPTY_PATH | KSTAT_QUERY_FLAGS)) != 0)
@@ -539,7 +540,7 @@ SYSCALL_DEFINE4(fstatat64, int, dfd, const char __user *, filename,
}
#endif /* __ARCH_WANT_STAT64 || __ARCH_WANT_COMPAT_STAT64 */
-noinline_for_stack int
+static noinline_for_stack int
cp_statx(const struct kstat *stat, struct statx __user *buffer)
{
struct statx tmp;
@@ -574,6 +575,24 @@ cp_statx(const struct kstat *stat, struct statx __user *buffer)
return copy_to_user(buffer, &tmp, sizeof(tmp)) ? -EFAULT : 0;
}
+int do_statx(int dfd, const char __user *filename, unsigned flags,
+ unsigned int mask, struct statx __user *buffer)
+{
+ struct kstat stat;
+ int error;
+
+ if (mask & STATX__RESERVED)
+ return -EINVAL;
+ if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_SYNC_TYPE)
+ return -EINVAL;
+
+ error = vfs_statx(dfd, filename, flags, &stat, mask);
+ if (error)
+ return error;
+
+ return cp_statx(&stat, buffer);
+}
+
/**
* sys_statx - System call to get enhanced stats
* @dfd: Base directory to pathwalk from *or* fd to stat.
@@ -590,19 +609,7 @@ SYSCALL_DEFINE5(statx,
unsigned int, mask,
struct statx __user *, buffer)
{
- struct kstat stat;
- int error;
-
- if (mask & STATX__RESERVED)
- return -EINVAL;
- if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_SYNC_TYPE)
- return -EINVAL;
-
- error = vfs_statx(dfd, filename, flags, &stat, mask);
- if (error)
- return error;
-
- return cp_statx(&stat, buffer);
+ return do_statx(dfd, filename, flags, mask, buffer);
}
#ifdef CONFIG_COMPAT