diff options
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/Kconfig | 18 | ||||
| -rw-r--r-- | fs/btrfs/ioctl.h | 14 | ||||
| -rw-r--r-- | fs/btrfs/super.c | 5 | ||||
| -rw-r--r-- | fs/btrfs/volumes.c | 1 |
4 files changed, 30 insertions, 8 deletions
diff --git a/fs/btrfs/Kconfig b/fs/btrfs/Kconfig new file mode 100644 index 00000000000..f8fcf999ea1 --- /dev/null +++ b/fs/btrfs/Kconfig @@ -0,0 +1,18 @@ +config BTRFS_FS + tristate "Btrfs filesystem (EXPERIMENTAL) Unstable disk format" + depends on EXPERIMENTAL + select LIBCRC32C + select ZLIB_INFLATE + select ZLIB_DEFLATE + help + Btrfs is a new filesystem with extents, writable snapshotting, + support for multiple devices and many more features. + + Btrfs is highly experimental, and THE DISK FORMAT IS NOT YET + FINALIZED. You should say N here unless you are interested in + testing Btrfs with non-critical data. + + To compile this file system support as a module, choose M here. The + module will be called btrfs. + + If unsure, say N. diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index 78049ea208d..b320b103fa1 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -22,13 +22,20 @@ #define BTRFS_IOCTL_MAGIC 0x94 #define BTRFS_VOL_NAME_MAX 255 -#define BTRFS_PATH_NAME_MAX 3072 +#define BTRFS_PATH_NAME_MAX 4087 +/* this should be 4k */ struct btrfs_ioctl_vol_args { __s64 fd; char name[BTRFS_PATH_NAME_MAX + 1]; }; +struct btrfs_ioctl_clone_range_args { + __s64 src_fd; + __u64 src_offset, src_length; + __u64 dest_offset; +}; + #define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \ struct btrfs_ioctl_vol_args) #define BTRFS_IOC_DEFRAG _IOW(BTRFS_IOCTL_MAGIC, 2, \ @@ -52,11 +59,6 @@ struct btrfs_ioctl_vol_args { struct btrfs_ioctl_vol_args) #define BTRFS_IOC_BALANCE _IOW(BTRFS_IOCTL_MAGIC, 12, \ struct btrfs_ioctl_vol_args) -struct btrfs_ioctl_clone_range_args { - __s64 src_fd; - __u64 src_offset, src_length; - __u64 dest_offset; -}; #define BTRFS_IOC_CLONE_RANGE _IOW(BTRFS_IOCTL_MAGIC, 13, \ struct btrfs_ioctl_clone_range_args) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 0a14b495532..db9fb3bc1e3 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -38,6 +38,7 @@ #include <linux/namei.h> #include <linux/miscdevice.h> #include <linux/version.h> +#include <linux/magic.h> #include "compat.h" #include "ctree.h" #include "disk-io.h" @@ -51,7 +52,6 @@ #include "export.h" #include "compression.h" -#define BTRFS_SUPER_MAGIC 0x9123683E static struct super_operations btrfs_super_ops; @@ -582,7 +582,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd, { struct btrfs_ioctl_vol_args *vol; struct btrfs_fs_devices *fs_devices; - int ret = 0; + int ret = -ENOTTY; int len; if (!capable(CAP_SYS_ADMIN)) @@ -594,6 +594,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd, goto out; } len = strnlen(vol->name, BTRFS_PATH_NAME_MAX); + switch (cmd) { case BTRFS_IOC_SCAN_DEV: ret = btrfs_scan_one_device(vol->name, FMODE_READ, diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index b187b537888..3451e1cca2b 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -220,6 +220,7 @@ loop: tail->bi_next = old_head; else device->pending_bio_tail = tail; + device->running_pending = 0; spin_unlock(&device->io_lock); btrfs_requeue_work(&device->work); |