path: root/fs/internal.h
diff options
authorJan Kara <jack@suse.cz>2012-06-12 16:20:35 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2012-07-31 09:40:38 +0400
commiteb04c28288bb0098d0e75d81ba2a575239de71d8 (patch)
tree82912fd7c78be269560a8af7d8516918c279255b /fs/internal.h
parent5accdf82ba25cacefd6c1867f1704beb4d244cdd (diff)
fs: Add freezing handling to mnt_want_write() / mnt_drop_write()
Most of places where we want freeze protection coincides with the places where we also have remount-ro protection. So make mnt_want_write() and mnt_drop_write() (and their _file alternative) prevent freezing as well. For the few cases that are really interested only in remount-ro protection provide new function variants. BugLink: https://bugs.launchpad.net/bugs/897421 Tested-by: Kamal Mostafa <kamal@canonical.com> Tested-by: Peter M. Petrakis <peter.petrakis@canonical.com> Tested-by: Dann Frazier <dann.frazier@canonical.com> Tested-by: Massimo Morana <massimo.morana@canonical.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/internal.h')
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/internal.h b/fs/internal.h
index a6fd56c68b1..371bcc4b169 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -61,6 +61,10 @@ extern void __init mnt_init(void);
extern struct lglock vfsmount_lock;
+extern int __mnt_want_write(struct vfsmount *);
+extern int __mnt_want_write_file(struct file *);
+extern void __mnt_drop_write(struct vfsmount *);
+extern void __mnt_drop_write_file(struct file *);
* fs_struct.c