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-rw-r--r--fs/file_table.c38
-rw-r--r--fs/internal.h5
-rw-r--r--fs/super.c39
3 files changed, 43 insertions, 39 deletions
diff --git a/fs/file_table.c b/fs/file_table.c
index 3d66dbcebef6..334ce39881f8 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -399,6 +399,44 @@ too_bad:
399 return 0; 399 return 0;
400} 400}
401 401
402/**
403 * mark_files_ro - mark all files read-only
404 * @sb: superblock in question
405 *
406 * All files are marked read-only. We don't care about pending
407 * delete files so this should be used in 'force' mode only.
408 */
409void mark_files_ro(struct super_block *sb)
410{
411 struct file *f;
412
413retry:
414 file_list_lock();
415 list_for_each_entry(f, &sb->s_files, f_u.fu_list) {
416 struct vfsmount *mnt;
417 if (!S_ISREG(f->f_path.dentry->d_inode->i_mode))
418 continue;
419 if (!file_count(f))
420 continue;
421 if (!(f->f_mode & FMODE_WRITE))
422 continue;
423 f->f_mode &= ~FMODE_WRITE;
424 if (file_check_writeable(f) != 0)
425 continue;
426 file_release_write(f);
427 mnt = mntget(f->f_path.mnt);
428 file_list_unlock();
429 /*
430 * This can sleep, so we can't hold
431 * the file_list_lock() spinlock.
432 */
433 mnt_drop_write(mnt);
434 mntput(mnt);
435 goto retry;
436 }
437 file_list_unlock();
438}
439
402void __init files_init(unsigned long mempages) 440void __init files_init(unsigned long mempages)
403{ 441{
404 int n; 442 int n;
diff --git a/fs/internal.h b/fs/internal.h
index b4dac4fb6b61..6d4ef208ef65 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -66,3 +66,8 @@ extern void __init mnt_init(void);
66 * fs_struct.c 66 * fs_struct.c
67 */ 67 */
68extern void chroot_fs_refs(struct path *, struct path *); 68extern void chroot_fs_refs(struct path *, struct path *);
69
70/*
71 * file_table.c
72 */
73extern void mark_files_ro(struct super_block *);
diff --git a/fs/super.c b/fs/super.c
index 1943fdf655fa..c170551c23fe 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -616,45 +616,6 @@ out:
616} 616}
617 617
618/** 618/**
619 * mark_files_ro - mark all files read-only
620 * @sb: superblock in question
621 *
622 * All files are marked read-only. We don't care about pending
623 * delete files so this should be used in 'force' mode only.
624 */
625
626static void mark_files_ro(struct super_block *sb)
627{
628 struct file *f;
629
630retry:
631 file_list_lock();
632 list_for_each_entry(f, &sb->s_files, f_u.fu_list) {
633 struct vfsmount *mnt;
634 if (!S_ISREG(f->f_path.dentry->d_inode->i_mode))
635 continue;
636 if (!file_count(f))
637 continue;
638 if (!(f->f_mode & FMODE_WRITE))
639 continue;
640 f->f_mode &= ~FMODE_WRITE;
641 if (file_check_writeable(f) != 0)
642 continue;
643 file_release_write(f);
644 mnt = mntget(f->f_path.mnt);
645 file_list_unlock();
646 /*
647 * This can sleep, so we can't hold
648 * the file_list_lock() spinlock.
649 */
650 mnt_drop_write(mnt);
651 mntput(mnt);
652 goto retry;
653 }
654 file_list_unlock();
655}
656
657/**
658 * do_remount_sb - asks filesystem to change mount options. 619 * do_remount_sb - asks filesystem to change mount options.
659 * @sb: superblock in question 620 * @sb: superblock in question
660 * @flags: numeric part of options 621 * @flags: numeric part of options