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| author | Chris Mason | 2008-04-25 22:53:30 +0200 |
|---|---|---|
| committer | Chris Mason | 2008-09-25 17:04:02 +0200 |
| commit | 8f18cf13396caae5a3d7ae91201cfb15181a9642 (patch) | |
| tree | ff4bfc2e7f45f10d176b969408cdb469ae3f7194 /fs/btrfs/inode.c | |
| parent | Btrfs: write_cache_pages came in 2.6.22 (diff) | |
| download | kernel-qcow2-linux-8f18cf13396caae5a3d7ae91201cfb15181a9642.tar.gz kernel-qcow2-linux-8f18cf13396caae5a3d7ae91201cfb15181a9642.tar.xz kernel-qcow2-linux-8f18cf13396caae5a3d7ae91201cfb15181a9642.zip | |
Btrfs: Make the resizer work based on shrinking and growing devices
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/inode.c')
| -rw-r--r-- | fs/btrfs/inode.c | 36 |
1 files changed, 28 insertions, 8 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index b31f52d4f2ca..4d12aa532c5b 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -16,6 +16,7 @@ * Boston, MA 021110-1307, USA. */ +#include <linux/kernel.h> #include <linux/bio.h> #include <linux/buffer_head.h> #include <linux/fs.h> @@ -2887,9 +2888,12 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg) { u64 new_size; u64 old_size; + u64 devid = 1; struct btrfs_ioctl_vol_args *vol_args; struct btrfs_trans_handle *trans; + struct btrfs_device *device = NULL; char *sizestr; + char *devstr = NULL; int ret = 0; int namelen; int mod = 0; @@ -2909,9 +2913,25 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg) goto out; } + mutex_lock(&root->fs_info->fs_mutex); sizestr = vol_args->name; + devstr = strchr(sizestr, ':'); + if (devstr) { + char *end; + sizestr = devstr + 1; + *devstr = '\0'; + devstr = vol_args->name; + devid = simple_strtoull(devstr, &end, 10); +printk("resizing devid %Lu\n", devid); + } + device = btrfs_find_device(root, devid, NULL); + if (!device) { + printk("resizer unable to find device %Lu\n", devid); + ret = -EINVAL; + goto out_unlock; + } if (!strcmp(sizestr, "max")) - new_size = root->fs_info->sb->s_bdev->bd_inode->i_size; + new_size = device->bdev->bd_inode->i_size; else { if (sizestr[0] == '-') { mod = -1; @@ -2923,12 +2943,11 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg) new_size = btrfs_parse_size(sizestr); if (new_size == 0) { ret = -EINVAL; - goto out; + goto out_unlock; } } - mutex_lock(&root->fs_info->fs_mutex); - old_size = btrfs_super_total_bytes(&root->fs_info->super_copy); + old_size = device->total_bytes; if (mod < 0) { if (new_size > old_size) { @@ -2944,7 +2963,7 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg) ret = -EINVAL; goto out_unlock; } - if (new_size > root->fs_info->sb->s_bdev->bd_inode->i_size) { + if (new_size > device->bdev->bd_inode->i_size) { ret = -EFBIG; goto out_unlock; } @@ -2952,13 +2971,14 @@ static int btrfs_ioctl_resize(struct btrfs_root *root, void __user *arg) do_div(new_size, root->sectorsize); new_size *= root->sectorsize; -printk("new size is %Lu\n", new_size); +printk("new size for %s is %llu\n", device->name, (unsigned long long)new_size); + if (new_size > old_size) { trans = btrfs_start_transaction(root, 1); - ret = btrfs_grow_extent_tree(trans, root, new_size); + ret = btrfs_grow_device(trans, device, new_size); btrfs_commit_transaction(trans, root); } else { - ret = btrfs_shrink_extent_tree(root, new_size); + ret = btrfs_shrink_device(device, new_size); } out_unlock: |