diff options
| author | Kent Overstreet <kent.overstreet@gmail.com> | 2018-02-08 15:02:37 -0500 |
|---|---|---|
| committer | Kent Overstreet <kent.overstreet@gmail.com> | 2018-02-08 15:23:07 -0500 |
| commit | cbd03c19f1fecec4d165f18d3fc90d0ed564f8cf (patch) | |
| tree | 751323f6be2036a7816eaade228883f1c0ae09b3 | |
| parent | ee93aed2dddb8a3f87133e9f2d7070d1781e6838 (diff) | |
bcachefs: fix filesystem character device
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
| -rw-r--r-- | fs/bcachefs/chardev.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/bcachefs/chardev.c b/fs/bcachefs/chardev.c index 1498832ba28f..bc289bfe3a31 100644 --- a/fs/bcachefs/chardev.c +++ b/fs/bcachefs/chardev.c @@ -488,9 +488,12 @@ long bch2_fs_ioctl(struct bch_fs *c, unsigned cmd, void __user *arg) } } +static DEFINE_IDR(bch_chardev_minor); + static long bch2_chardev_ioctl(struct file *filp, unsigned cmd, unsigned long v) { - struct bch_fs *c = filp->private_data; + unsigned minor = iminor(file_inode(filp)); + struct bch_fs *c = minor < U8_MAX ? idr_find(&bch_chardev_minor, minor) : NULL; void __user *arg = (void __user *) v; return c @@ -507,7 +510,6 @@ static const struct file_operations bch_chardev_fops = { static int bch_chardev_major; static struct class *bch_chardev_class; static struct device *bch_chardev; -static DEFINE_IDR(bch_chardev_minor); void bch2_fs_chardev_exit(struct bch_fs *c) { @@ -524,7 +526,7 @@ int bch2_fs_chardev_init(struct bch_fs *c) return c->minor; c->chardev = device_create(bch_chardev_class, NULL, - MKDEV(bch_chardev_major, c->minor), NULL, + MKDEV(bch_chardev_major, c->minor), c, "bcachefs%u-ctl", c->minor); if (IS_ERR(c->chardev)) return PTR_ERR(c->chardev); @@ -536,7 +538,7 @@ void bch2_chardev_exit(void) { if (!IS_ERR_OR_NULL(bch_chardev_class)) device_destroy(bch_chardev_class, - MKDEV(bch_chardev_major, 255)); + MKDEV(bch_chardev_major, U8_MAX)); if (!IS_ERR_OR_NULL(bch_chardev_class)) class_destroy(bch_chardev_class); if (bch_chardev_major > 0) @@ -554,7 +556,7 @@ int __init bch2_chardev_init(void) return PTR_ERR(bch_chardev_class); bch_chardev = device_create(bch_chardev_class, NULL, - MKDEV(bch_chardev_major, 255), + MKDEV(bch_chardev_major, U8_MAX), NULL, "bcachefs-ctl"); if (IS_ERR(bch_chardev)) return PTR_ERR(bch_chardev); |