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authorChristoph Hellwig <hch@lst.de>2017-05-27 11:16:48 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-06-30 00:49:22 +0300
commit19c735868dd018fd432d0df43aaf2d5ecb7c1256 (patch)
tree4af76a023d4a2ebb68fbb46081da2b915962188e /fs/read_write.c
parent26c87fb7d10dadc59a475c7809adc05303bf951e (diff)
downloadlinux-19c735868dd018fd432d0df43aaf2d5ecb7c1256.tar.xz
fs: remove __do_readv_writev
Split it into one helper each for reads vs writes. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/read_write.c')
-rw-r--r--fs/read_write.c60
1 files changed, 36 insertions, 24 deletions
diff --git a/fs/read_write.c b/fs/read_write.c
index 5cbdf23d924f..f453c9a485b9 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -916,8 +916,8 @@ out:
}
#endif
-static ssize_t __do_readv_writev(int type, struct file *file,
- struct iov_iter *iter, loff_t *pos, int flags)
+static ssize_t do_iter_read(struct file *file, struct iov_iter *iter,
+ loff_t *pos, int flags)
{
size_t tot_len;
ssize_t ret = 0;
@@ -925,29 +925,41 @@ static ssize_t __do_readv_writev(int type, struct file *file,
tot_len = iov_iter_count(iter);
if (!tot_len)
goto out;
- ret = rw_verify_area(type, file, pos, tot_len);
+ ret = rw_verify_area(READ, file, pos, tot_len);
if (ret < 0)
- goto out;
-
- if (type != READ)
- file_start_write(file);
+ return ret;
- if ((type == READ && file->f_op->read_iter) ||
- (type == WRITE && file->f_op->write_iter))
- ret = do_iter_readv_writev(file, iter, pos, type, flags);
+ if (file->f_op->read_iter)
+ ret = do_iter_readv_writev(file, iter, pos, READ, flags);
else
- ret = do_loop_readv_writev(file, iter, pos, type, flags);
+ ret = do_loop_readv_writev(file, iter, pos, READ, flags);
+out:
+ if (ret >= 0)
+ fsnotify_access(file);
+ return ret;
+}
- if (type != READ)
- file_end_write(file);
+static ssize_t do_iter_write(struct file *file, struct iov_iter *iter,
+ loff_t *pos, int flags)
+{
+ size_t tot_len;
+ ssize_t ret = 0;
-out:
- if ((ret + (type == READ)) > 0) {
- if (type == READ)
- fsnotify_access(file);
- else
- fsnotify_modify(file);
- }
+ tot_len = iov_iter_count(iter);
+ if (!tot_len)
+ return 0;
+ ret = rw_verify_area(WRITE, file, pos, tot_len);
+ if (ret < 0)
+ return ret;
+
+ file_start_write(file);
+ if (file->f_op->write_iter)
+ ret = do_iter_readv_writev(file, iter, pos, WRITE, flags);
+ else
+ ret = do_loop_readv_writev(file, iter, pos, WRITE, flags);
+ file_end_write(file);
+ if (ret > 0)
+ fsnotify_modify(file);
return ret;
}
@@ -968,7 +980,7 @@ ssize_t vfs_readv(struct file *file, const struct iovec __user *vec,
if (ret < 0)
return ret;
- ret = __do_readv_writev(READ, file, &iter, pos, flags);
+ ret = do_iter_read(file, &iter, pos, flags);
kfree(iov);
return ret;
}
@@ -991,7 +1003,7 @@ ssize_t vfs_writev(struct file *file, const struct iovec __user *vec,
if (ret < 0)
return ret;
- ret = __do_readv_writev(WRITE, file, &iter, pos, flags);
+ ret = do_iter_write(file, &iter, pos, flags);
kfree(iov);
return ret;
}
@@ -1161,7 +1173,7 @@ static size_t compat_readv(struct file *file,
ret = compat_import_iovec(READ, vec, vlen, UIO_FASTIOV, &iov, &iter);
if (ret < 0)
goto out;
- ret = __do_readv_writev(READ, file, &iter, pos, flags);
+ ret = do_iter_read(file, &iter, pos, flags);
kfree(iov);
out:
if (ret > 0)
@@ -1274,7 +1286,7 @@ static size_t compat_writev(struct file *file,
ret = compat_import_iovec(WRITE, vec, vlen, UIO_FASTIOV, &iov, &iter);
if (ret < 0)
goto out;
- ret = __do_readv_writev(WRITE, file, &iter, pos, flags);
+ ret = do_iter_write(file, &iter, pos, flags);
kfree(iov);
out:
if (ret > 0)