Commit 87112933 authored by Omar Sandoval's avatar Omar Sandoval Committed by David Sterba
Browse files

fs: export rw_verify_area() 



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: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarOmar Sandoval <osandov@fb.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 457b0a3d

fs/internal.h

+0 −5
Original line number Diff line number Diff line
@@ -157,11 +157,6 @@ 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

 */

fs/read_write.c

+1 −0
Original line number Diff line number Diff line
@@ -385,6 +385,7 @@ 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)

{

include/linux/fs.h

+1 −0
Original line number Diff line number Diff line
@@ -3173,6 +3173,7 @@ 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);

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);