From: Anand Jain anand.jain@oracle.com
Commit d24fa5c1da08026be9959baca309fa0adf8708bf upstream.
In preparation to fix a bug in btrfs_show_devname().
Convert fs_devices::latest_bdev type from struct block_device to struct btrfs_device and, rename the member to fs_devices::latest_dev. So that btrfs_show_devname() can use fs_devices::latest_dev::name.
Tested-by: Su Yue l@damenly.su Signed-off-by: Anand Jain anand.jain@oracle.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Anand Jain anand.jain@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/disk-io.c | 6 +++--- fs/btrfs/extent_io.c | 2 +- fs/btrfs/inode.c | 2 +- fs/btrfs/super.c | 2 +- fs/btrfs/volumes.c | 10 +++++----- fs/btrfs/volumes.h | 6 +++++- 6 files changed, 16 insertions(+), 12 deletions(-)
--- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -3229,12 +3229,12 @@ int __cold open_ctree(struct super_block mapping_set_gfp_mask(fs_info->btree_inode->i_mapping, GFP_NOFS); btrfs_init_btree_inode(fs_info);
- invalidate_bdev(fs_devices->latest_bdev); + invalidate_bdev(fs_devices->latest_dev->bdev);
/* * Read super block and check the signature bytes only */ - disk_super = btrfs_read_dev_super(fs_devices->latest_bdev); + disk_super = btrfs_read_dev_super(fs_devices->latest_dev->bdev); if (IS_ERR(disk_super)) { err = PTR_ERR(disk_super); goto fail_alloc; @@ -3466,7 +3466,7 @@ int __cold open_ctree(struct super_block * below in btrfs_init_dev_replace(). */ btrfs_free_extra_devids(fs_devices); - if (!fs_devices->latest_bdev) { + if (!fs_devices->latest_dev->bdev) { btrfs_err(fs_info, "failed to read devices"); goto fail_tree_roots; } --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -3327,7 +3327,7 @@ static int alloc_new_bio(struct btrfs_in if (wbc) { struct block_device *bdev;
- bdev = fs_info->fs_devices->latest_bdev; + bdev = fs_info->fs_devices->latest_dev->bdev; bio_set_dev(bio, bdev); wbc_init_bio(wbc, bio); } --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -7967,7 +7967,7 @@ static int btrfs_dio_iomap_begin(struct iomap->type = IOMAP_MAPPED; } iomap->offset = start; - iomap->bdev = fs_info->fs_devices->latest_bdev; + iomap->bdev = fs_info->fs_devices->latest_dev->bdev; iomap->length = len;
if (write && btrfs_use_zone_append(BTRFS_I(inode), em->block_start)) --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1705,7 +1705,7 @@ static struct dentry *btrfs_mount_root(s goto error_close_devices; }
- bdev = fs_devices->latest_bdev; + bdev = fs_devices->latest_dev->bdev; s = sget(fs_type, btrfs_test_super, btrfs_set_super, flags | SB_NOSEC, fs_info); if (IS_ERR(s)) { --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -1092,7 +1092,7 @@ void btrfs_free_extra_devids(struct btrf list_for_each_entry(seed_dev, &fs_devices->seed_list, seed_list) __btrfs_free_extra_devids(seed_dev, &latest_dev);
- fs_devices->latest_bdev = latest_dev->bdev; + fs_devices->latest_dev = latest_dev;
mutex_unlock(&uuid_mutex); } @@ -1225,7 +1225,7 @@ static int open_fs_devices(struct btrfs_ return -EINVAL;
fs_devices->opened = 1; - fs_devices->latest_bdev = latest_dev->bdev; + fs_devices->latest_dev = latest_dev; fs_devices->total_rw_bytes = 0; fs_devices->chunk_alloc_policy = BTRFS_CHUNK_ALLOC_REGULAR; fs_devices->read_policy = BTRFS_READ_POLICY_PID; @@ -1993,7 +1993,7 @@ static struct btrfs_device * btrfs_find_ }
/* - * Helper function to check if the given device is part of s_bdev / latest_bdev + * Helper function to check if the given device is part of s_bdev / latest_dev * and replace it with the provided or the next active device, in the context * where this function called, there should be always be another device (or * this_dev) which is active. @@ -2012,8 +2012,8 @@ void __cold btrfs_assign_next_active_dev (fs_info->sb->s_bdev == device->bdev)) fs_info->sb->s_bdev = next_device->bdev;
- if (fs_info->fs_devices->latest_bdev == device->bdev) - fs_info->fs_devices->latest_bdev = next_device->bdev; + if (fs_info->fs_devices->latest_dev->bdev == device->bdev) + fs_info->fs_devices->latest_dev = next_device; }
/* --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -246,7 +246,11 @@ struct btrfs_fs_devices { /* Highest generation number of seen devices */ u64 latest_generation;
- struct block_device *latest_bdev; + /* + * The mount device or a device with highest generation after removal + * or replace. + */ + struct btrfs_device *latest_dev;
/* all of the devices in the FS, protected by a mutex * so we can safely walk it to write out the supers without