[PATCH 25/39] convert do_preadv()/do_pwritev()
From: viro@kernel.org
Date: 2024-07-30 05:15:10
Also in:
bpf, cgroups, kvm, linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
From: Al Viro <viro@zeniv.linux.org.uk>
fdput() can be transposed with add_{r,w}char() and inc_sysc{r,w}();
it's the same story as with do_readv()/do_writev(), only with
fdput() instead of fdput_pos().
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
fs/read_write.c | 12 ++++--------
1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/fs/read_write.c b/fs/read_write.c
index 789ea6ecf147..486ed16ab633 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c@@ -1020,18 +1020,16 @@ static inline loff_t pos_from_hilo(unsigned long high, unsigned long low) static ssize_t do_preadv(unsigned long fd, const struct iovec __user *vec, unsigned long vlen, loff_t pos, rwf_t flags) { - struct fd f; ssize_t ret = -EBADF; if (pos < 0) return -EINVAL; - f = fdget(fd); - if (fd_file(f)) { + CLASS(fd, f)(fd); + if (!fd_empty(f)) { ret = -ESPIPE; if (fd_file(f)->f_mode & FMODE_PREAD) ret = vfs_readv(fd_file(f), vec, vlen, &pos, flags); - fdput(f); } if (ret > 0)
@@ -1043,18 +1041,16 @@ static ssize_t do_preadv(unsigned long fd, const struct iovec __user *vec, static ssize_t do_pwritev(unsigned long fd, const struct iovec __user *vec, unsigned long vlen, loff_t pos, rwf_t flags) { - struct fd f; ssize_t ret = -EBADF; if (pos < 0) return -EINVAL; - f = fdget(fd); - if (fd_file(f)) { + CLASS(fd, f)(fd); + if (!fd_empty(f)) { ret = -ESPIPE; if (fd_file(f)->f_mode & FMODE_PWRITE) ret = vfs_writev(fd_file(f), vec, vlen, &pos, flags); - fdput(f); } if (ret > 0)
--
2.39.2