diff options
Diffstat (limited to 'target/linux/generic/files/fs/yaffs2/yaffs_vfs.c')
| -rw-r--r-- | target/linux/generic/files/fs/yaffs2/yaffs_vfs.c | 47 |
1 files changed, 43 insertions, 4 deletions
diff --git a/target/linux/generic/files/fs/yaffs2/yaffs_vfs.c b/target/linux/generic/files/fs/yaffs2/yaffs_vfs.c index 76bc1db59f..6540434371 100644 --- a/target/linux/generic/files/fs/yaffs2/yaffs_vfs.c +++ b/target/linux/generic/files/fs/yaffs2/yaffs_vfs.c @@ -738,7 +738,7 @@ static int yaffs_file_flush(struct file *file) yaffs_gross_lock(dev); - yaffs_flush_file(obj, 1, 0); + yaffs_flush_file(obj, 1, 0, 0); yaffs_gross_unlock(dev); @@ -768,7 +768,7 @@ static int yaffs_sync_object(struct file *file, struct dentry *dentry, yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, "yaffs_sync_object"); yaffs_gross_lock(dev); - yaffs_flush_file(obj, 1, datasync); + yaffs_flush_file(obj, 1, datasync, 0); yaffs_gross_unlock(dev); return 0; } @@ -2187,7 +2187,7 @@ static void yaffs_flush_inodes(struct super_block *sb) yaffs_trace(YAFFS_TRACE_OS, "flushing obj %d", obj->obj_id); - yaffs_flush_file(obj, 1, 0); + yaffs_flush_file(obj, 1, 0, 0); } } } @@ -2200,7 +2200,7 @@ static void yaffs_flush_super(struct super_block *sb, int do_checkpoint) yaffs_flush_inodes(sb); yaffs_update_dirty_dirs(dev); - yaffs_flush_whole_cache(dev); + yaffs_flush_whole_cache(dev, 1); if (do_checkpoint) yaffs_checkpoint_save(dev); } @@ -2579,7 +2579,45 @@ static int yaffs_sync_fs(struct super_block *sb) return 0; } +/* the function only is used to change dev->read_only when this file system + * is remounted. + */ +static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data) +{ + int read_only = 0; + struct mtd_info *mtd; + struct yaffs_dev *dev = 0; + /* Get the device */ + mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); + if (!mtd) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device #%u doesn't appear to exist", + MINOR(sb->s_dev)); + return 1; + } + + /* Check it's NAND */ + if (mtd->type != MTD_NANDFLASH) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device is not NAND it's type %d", + mtd->type); + return 1; + } + + read_only = ((*flags & MS_RDONLY) != 0); + if (!read_only && !(mtd->flags & MTD_WRITEABLE)) { + read_only = 1; + printk(KERN_INFO + "yaffs: mtd is read only, setting superblock read only"); + *flags |= MS_RDONLY; + } + + dev = sb->s_fs_info; + dev->read_only = read_only; + + return 0; +} static const struct super_operations yaffs_super_ops = { .statfs = yaffs_statfs, @@ -2601,6 +2639,7 @@ static const struct super_operations yaffs_super_ops = { #ifdef YAFFS_HAS_WRITE_SUPER .write_super = yaffs_write_super, #endif + .remount_fs = yaffs_remount_fs, }; struct yaffs_options { |