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Message-ID: <20240430151917.30036-1-cgoettsche@seltendoof.de>
Date: Tue, 30 Apr 2024 17:19:14 +0200
From: Christian Göttsche <cgoettsche@...tendoof.de>
To: brauner@...nel.org
Cc: Christian Göttsche <cgzones@...glemail.com>,
Jan Kara <jack@...e.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
Jan Kara <jack@...e.cz>,
Arnd Bergmann <arnd@...db.de>,
Thomas Gleixner <tglx@...utronix.de>,
Kees Cook <keescook@...omium.org>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Casey Schaufler <casey@...aufler-ca.com>,
"peterz@...radead.org" <peterz@...radead.org>,
Sohil Mehta <sohil.mehta@...el.com>,
Miklos Szeredi <mszeredi@...hat.com>,
Mark Rutland <mark.rutland@....com>,
linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-api@...r.kernel.org
Subject: [PATCH] fs/xattr: unify *at syscalls
From: Christian Göttsche <cgzones@...glemail.com>
Use the same parameter ordering for all four newly added *xattrat
syscalls:
dirfd, pathname, at_flags, ...
Also consistently use unsigned int as the type for at_flags.
Suggested-by: Jan Kara <jack@...e.com>
Signed-off-by: Christian Göttsche <cgzones@...glemail.com>
---
fs/xattr.c | 36 +++++++++++++++++++-----------------
include/linux/syscalls.h | 8 +++++---
2 files changed, 24 insertions(+), 20 deletions(-)
diff --git a/fs/xattr.c b/fs/xattr.c
index 45603e74c632..454304046d7d 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -931,17 +931,18 @@ listxattr(struct dentry *d, char __user *list, size_t size)
return error;
}
-static ssize_t do_listxattrat(int dfd, const char __user *pathname, char __user *list,
- size_t size, int flags)
+static ssize_t do_listxattrat(int dfd, const char __user *pathname,
+ unsigned int at_flags,
+ char __user *list, size_t size)
{
struct path path;
ssize_t error = 0;
int lookup_flags;
- if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
+ if ((at_flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
return -EINVAL;
- if (flags & AT_EMPTY_PATH && vfs_empty_path(dfd, pathname)) {
+ if (at_flags & AT_EMPTY_PATH && vfs_empty_path(dfd, pathname)) {
CLASS(fd, f)(dfd);
if (!f.file)
@@ -965,22 +966,23 @@ static ssize_t do_listxattrat(int dfd, const char __user *pathname, char __user
return error;
}
-SYSCALL_DEFINE5(listxattrat, int, dfd, const char __user *, pathname, char __user *, list,
- size_t, size, int, flags)
+SYSCALL_DEFINE5(listxattrat, int, dfd, const char __user *, pathname,
+ unsigned int, at_flags,
+ char __user *, list, size_t, size)
{
- return do_listxattrat(dfd, pathname, list, size, flags);
+ return do_listxattrat(dfd, pathname, at_flags, list, size);
}
SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list,
size_t, size)
{
- return do_listxattrat(AT_FDCWD, pathname, list, size, 0);
+ return do_listxattrat(AT_FDCWD, pathname, 0, list, size);
}
SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list,
size_t, size)
{
- return do_listxattrat(AT_FDCWD, pathname, list, size, AT_SYMLINK_NOFOLLOW);
+ return do_listxattrat(AT_FDCWD, pathname, AT_SYMLINK_NOFOLLOW, list, size);
}
SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size)
@@ -1019,17 +1021,17 @@ removexattr(struct mnt_idmap *idmap, struct dentry *d,
}
static int do_removexattrat(int dfd, const char __user *pathname,
- const char __user *name, int flags)
+ unsigned int at_flags, const char __user *name)
{
struct path path;
int error;
int lookup_flags;
- if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
+ if ((at_flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
return -EINVAL;
- lookup_flags = (flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
- if (flags & AT_EMPTY_PATH)
+ lookup_flags = (at_flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
+ if (at_flags & AT_EMPTY_PATH)
lookup_flags |= LOOKUP_EMPTY;
retry:
error = user_path_at(dfd, pathname, lookup_flags, &path);
@@ -1049,21 +1051,21 @@ static int do_removexattrat(int dfd, const char __user *pathname,
}
SYSCALL_DEFINE4(removexattrat, int, dfd, const char __user *, pathname,
- const char __user *, name, int, flags)
+ unsigned int, at_flags, const char __user *, name)
{
- return do_removexattrat(dfd, pathname, name, flags);
+ return do_removexattrat(dfd, pathname, at_flags, name);
}
SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
const char __user *, name)
{
- return do_removexattrat(AT_FDCWD, pathname, name, 0);
+ return do_removexattrat(AT_FDCWD, pathname, 0, name);
}
SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
const char __user *, name)
{
- return do_removexattrat(AT_FDCWD, pathname, name, AT_SYMLINK_NOFOLLOW);
+ return do_removexattrat(AT_FDCWD, pathname, AT_SYMLINK_NOFOLLOW, name);
}
SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index e06fffc48535..ca3cba698602 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -356,15 +356,17 @@ asmlinkage long sys_fgetxattr(int fd, const char __user *name,
void __user *value, size_t size);
asmlinkage long sys_listxattr(const char __user *path, char __user *list,
size_t size);
-asmlinkage long sys_listxattrat(int dfd, const char __user *path, char __user *list,
- size_t size, int flags);
+asmlinkage long sys_listxattrat(int dfd, const char __user *path,
+ unsigned int at_flags,
+ char __user *list, size_t size);
asmlinkage long sys_llistxattr(const char __user *path, char __user *list,
size_t size);
asmlinkage long sys_flistxattr(int fd, char __user *list, size_t size);
asmlinkage long sys_removexattr(const char __user *path,
const char __user *name);
asmlinkage long sys_removexattrat(int dfd, const char __user *path,
- const char __user *name, int flags);
+ unsigned int at_flags,
+ const char __user *name);
asmlinkage long sys_lremovexattr(const char __user *path,
const char __user *name);
asmlinkage long sys_fremovexattr(int fd, const char __user *name);
--
2.43.0
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