diff options
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/file_table.c | 38 | ||||
| -rw-r--r-- | fs/internal.h | 5 | ||||
| -rw-r--r-- | fs/super.c | 39 |
3 files changed, 43 insertions, 39 deletions
diff --git a/fs/file_table.c b/fs/file_table.c index 3d66dbcebef..334ce39881f 100644 --- a/fs/file_table.c +++ b/fs/file_table.c @@ -399,6 +399,44 @@ too_bad: return 0; } +/** + * mark_files_ro - mark all files read-only + * @sb: superblock in question + * + * All files are marked read-only. We don't care about pending + * delete files so this should be used in 'force' mode only. + */ +void mark_files_ro(struct super_block *sb) +{ + struct file *f; + +retry: + file_list_lock(); + list_for_each_entry(f, &sb->s_files, f_u.fu_list) { + struct vfsmount *mnt; + if (!S_ISREG(f->f_path.dentry->d_inode->i_mode)) + continue; + if (!file_count(f)) + continue; + if (!(f->f_mode & FMODE_WRITE)) + continue; + f->f_mode &= ~FMODE_WRITE; + if (file_check_writeable(f) != 0) + continue; + file_release_write(f); + mnt = mntget(f->f_path.mnt); + file_list_unlock(); + /* + * This can sleep, so we can't hold + * the file_list_lock() spinlock. + */ + mnt_drop_write(mnt); + mntput(mnt); + goto retry; + } + file_list_unlock(); +} + void __init files_init(unsigned long mempages) { int n; diff --git a/fs/internal.h b/fs/internal.h index b4dac4fb6b6..6d4ef208ef6 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -66,3 +66,8 @@ extern void __init mnt_init(void); * fs_struct.c */ extern void chroot_fs_refs(struct path *, struct path *); + +/* + * file_table.c + */ +extern void mark_files_ro(struct super_block *); diff --git a/fs/super.c b/fs/super.c index 1943fdf655f..c170551c23f 100644 --- a/fs/super.c +++ b/fs/super.c @@ -616,45 +616,6 @@ out: } /** - * mark_files_ro - mark all files read-only - * @sb: superblock in question - * - * All files are marked read-only. We don't care about pending - * delete files so this should be used in 'force' mode only. - */ - -static void mark_files_ro(struct super_block *sb) -{ - struct file *f; - -retry: - file_list_lock(); - list_for_each_entry(f, &sb->s_files, f_u.fu_list) { - struct vfsmount *mnt; - if (!S_ISREG(f->f_path.dentry->d_inode->i_mode)) - continue; - if (!file_count(f)) - continue; - if (!(f->f_mode & FMODE_WRITE)) - continue; - f->f_mode &= ~FMODE_WRITE; - if (file_check_writeable(f) != 0) - continue; - file_release_write(f); - mnt = mntget(f->f_path.mnt); - file_list_unlock(); - /* - * This can sleep, so we can't hold - * the file_list_lock() spinlock. - */ - mnt_drop_write(mnt); - mntput(mnt); - goto retry; - } - file_list_unlock(); -} - -/** * do_remount_sb - asks filesystem to change mount options. * @sb: superblock in question * @flags: numeric part of options |