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Btrfs: add a device id to device items

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Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-04-12 12:14:00 -04:00
committed by David Woodhouse
parent 8352d8a473
commit b4100d6424
4 changed files with 65 additions and 12 deletions
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36
fs/btrfs/ctree.h
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@@ -91,10 +91,12 @@ struct btrfs_super_block {
__le64 total_blocks;
__le64 blocks_used;
__le64 root_dir_objectid;
__le64 last_device_id;
/* fields below here vary with the underlying disk */
__le64 device_block_start;
__le64 device_num_blocks;
__le64 device_root;
__le64 device_id;
} __attribute__ ((__packed__));
/*
@@ -230,6 +232,7 @@ struct btrfs_csum_item {
struct btrfs_device_item {
__le16 pathlen;
__le64 device_id;
} __attribute__ ((__packed__));
struct crypto_hash;
@@ -798,6 +801,28 @@ static inline void btrfs_set_super_root_dir(struct btrfs_super_block *s, u64
s->root_dir_objectid = cpu_to_le64(val);
}
static inline u64 btrfs_super_last_device_id(struct btrfs_super_block *s)
{
return le64_to_cpu(s->last_device_id);
}
static inline void btrfs_set_super_last_device_id(struct btrfs_super_block *s,
u64 val)
{
s->last_device_id = cpu_to_le64(val);
}
static inline u64 btrfs_super_device_id(struct btrfs_super_block *s)
{
return le64_to_cpu(s->device_id);
}
static inline void btrfs_set_super_device_id(struct btrfs_super_block *s,
u64 val)
{
s->device_id = cpu_to_le64(val);
}
static inline u64 btrfs_super_device_block_start(struct btrfs_super_block *s)
{
return le64_to_cpu(s->device_block_start);
@@ -910,6 +935,17 @@ static inline void btrfs_set_device_pathlen(struct btrfs_device_item *d,
d->pathlen = cpu_to_le16(val);
}
static inline u64 btrfs_device_id(struct btrfs_device_item *d)
{
return le64_to_cpu(d->device_id);
}
static inline void btrfs_set_device_id(struct btrfs_device_item *d,
u64 val)
{
d->device_id = cpu_to_le64(val);
}
static inline struct btrfs_root *btrfs_sb(struct super_block *sb)
{
return sb->s_fs_info;