[PATCH v11 01/14] fs: export rw_verify_area()
From: Omar Sandoval <osandov@osandov.com>
Date: 2021-09-01 17:01:32
Also in:
linux-btrfs, linux-fsdevel
Subsystem:
filesystems (vfs and infrastructure), the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
From: Omar Sandoval <redacted> I'm adding Btrfs ioctls to read and write compressed data, and rather than duplicating the checks in rw_verify_area(), let's just export it. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Omar Sandoval <redacted> --- fs/internal.h | 5 ----- fs/read_write.c | 1 + include/linux/fs.h | 1 + 3 files changed, 2 insertions(+), 5 deletions(-)
diff --git a/fs/internal.h b/fs/internal.h
index 82e8eb32ff3d..f471894d87d4 100644
--- a/fs/internal.h
+++ b/fs/internal.h@@ -165,11 +165,6 @@ extern char *simple_dname(struct dentry *, char *, int); extern void dput_to_list(struct dentry *, struct list_head *); extern void shrink_dentry_list(struct list_head *); -/* - * read_write.c - */ -extern int rw_verify_area(int, struct file *, const loff_t *, size_t); - /* * pipe.c */
diff --git a/fs/read_write.c b/fs/read_write.c
index 9db7adf160d2..0029ff2b0ca8 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c@@ -400,6 +400,7 @@ int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t return security_file_permission(file, read_write == READ ? MAY_READ : MAY_WRITE); } +EXPORT_SYMBOL(rw_verify_area); static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos) {
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 1751addcb36e..0de4d75339b9 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h@@ -3274,6 +3274,7 @@ extern loff_t fixed_size_llseek(struct file *file, loff_t offset, int whence, loff_t size); extern loff_t no_seek_end_llseek_size(struct file *, loff_t, int, loff_t); extern loff_t no_seek_end_llseek(struct file *, loff_t, int); +extern int rw_verify_area(int, struct file *, const loff_t *, size_t); extern int generic_file_open(struct inode * inode, struct file * filp); extern int nonseekable_open(struct inode * inode, struct file * filp); extern int stream_open(struct inode * inode, struct file * filp);
--
2.33.0