[03/32] vfs: Export rw_verify_area() for use by cachefiles
diff mbox series

Message ID 159465787270.1376674.9709773455326854521.stgit@warthog.procyon.org.uk
State New
Headers show
Series
  • fscache: Rewrite 2: Make the I/O interface use kiocb/iov_iter
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Commit Message

David Howells July 13, 2020, 4:31 p.m. UTC
Export rw_verify_area() for so that cachefiles can use it before issuing
call_read_iter() and call_write_iter() to effect async DIO operations
against the cache.

Signed-off-by: David Howells <dhowells@redhat.com>
---

 fs/internal.h      |    5 -----
 fs/read_write.c    |    1 +
 include/linux/fs.h |    1 +
 3 files changed, 2 insertions(+), 5 deletions(-)

Patch
diff mbox series

diff --git a/fs/internal.h b/fs/internal.h
index 9b863a7bd708..8213a29a972f 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -156,11 +156,6 @@  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 bbfa9b12b15e..eb18270a1e14 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 3f881a892ea7..aa3e3af92220 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2905,6 +2905,7 @@  extern int notify_change(struct dentry *, struct iattr *, struct inode **);
 extern int inode_permission(struct inode *, int);
 extern int generic_permission(struct inode *, int);
 extern int __check_sticky(struct inode *dir, struct inode *inode);
+extern int rw_verify_area(int, struct file *, const loff_t *, size_t);
 
 static inline bool execute_ok(struct inode *inode)
 {