diff mbox series

[v3,03/28] timerfd: switch to CLASS(fd)

Message ID 20241102050827.2451599-3-viro@zeniv.linux.org.uk (mailing list archive)
State Changes Requested
Headers show
Series [v3,01/28] net/socket.c: switch to CLASS(fd) | expand

Checks

Context Check Description
netdev/series_format fail Series does not have a cover letter; Series longer than 15 patches (and no cover letter)
netdev/tree_selection success Guessed tree name to be net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 3 this patch: 3
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers warning 4 maintainers not CCed: jack@suse.cz tglx@linutronix.de anna-maria@linutronix.de frederic@kernel.org
netdev/build_clang success Errors and warnings before: 3 this patch: 3
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 4 this patch: 4
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 79 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-11-02--12-00 (tests: 779)

Commit Message

Al Viro Nov. 2, 2024, 5:08 a.m. UTC 
Fold timerfd_fget() into both callers to have fdget() and fdput() in
the same scope.  Could be done in different ways, but this is probably
the smallest solution.

Reviewed-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/timerfd.c | 40 ++++++++++++++--------------------------
 1 file changed, 14 insertions(+), 26 deletions(-)
diff mbox series

Patch

diff --git a/fs/timerfd.c b/fs/timerfd.c
index 137523e0bb21..4c32244b0508 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c
@@ -394,19 +394,6 @@  static const struct file_operations timerfd_fops = {
 	.unlocked_ioctl	= timerfd_ioctl,
 };
 
-static int timerfd_fget(int fd, struct fd *p)
-{
-	struct fd f = fdget(fd);
-	if (!fd_file(f))
-		return -EBADF;
-	if (fd_file(f)->f_op != &timerfd_fops) {
-		fdput(f);
-		return -EINVAL;
-	}
-	*p = f;
-	return 0;
-}
-
 SYSCALL_DEFINE2(timerfd_create, int, clockid, int, flags)
 {
 	int ufd;
@@ -471,7 +458,6 @@  static int do_timerfd_settime(int ufd, int flags,
 		const struct itimerspec64 *new,
 		struct itimerspec64 *old)
 {
-	struct fd f;
 	struct timerfd_ctx *ctx;
 	int ret;
 
@@ -479,15 +465,17 @@  static int do_timerfd_settime(int ufd, int flags,
 		 !itimerspec64_valid(new))
 		return -EINVAL;
 
-	ret = timerfd_fget(ufd, &f);
-	if (ret)
-		return ret;
+	CLASS(fd, f)(ufd);
+	if (fd_empty(f))
+		return -EBADF;
+
+	if (fd_file(f)->f_op != &timerfd_fops)
+		return -EINVAL;
+
 	ctx = fd_file(f)->private_data;
 
-	if (isalarm(ctx) && !capable(CAP_WAKE_ALARM)) {
-		fdput(f);
+	if (isalarm(ctx) && !capable(CAP_WAKE_ALARM))
 		return -EPERM;
-	}
 
 	timerfd_setup_cancel(ctx, flags);
 
@@ -535,17 +523,18 @@  static int do_timerfd_settime(int ufd, int flags,
 	ret = timerfd_setup(ctx, flags, new);
 
 	spin_unlock_irq(&ctx->wqh.lock);
-	fdput(f);
 	return ret;
 }
 
 static int do_timerfd_gettime(int ufd, struct itimerspec64 *t)
 {
-	struct fd f;
 	struct timerfd_ctx *ctx;
-	int ret = timerfd_fget(ufd, &f);
-	if (ret)
-		return ret;
+	CLASS(fd, f)(ufd);
+
+	if (fd_empty(f))
+		return -EBADF;
+	if (fd_file(f)->f_op != &timerfd_fops)
+		return -EINVAL;
 	ctx = fd_file(f)->private_data;
 
 	spin_lock_irq(&ctx->wqh.lock);
@@ -567,7 +556,6 @@  static int do_timerfd_gettime(int ufd, struct itimerspec64 *t)
 	t->it_value = ktime_to_timespec64(timerfd_get_remaining(ctx));
 	t->it_interval = ktime_to_timespec64(ctx->tintv);
 	spin_unlock_irq(&ctx->wqh.lock);
-	fdput(f);
 	return 0;
 }