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bcachefs: Expand BTREE_NODE_ID

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We now have 20 bits for the btree ID in the on disk format - sufficient
for 1 million distinct btrees.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-06-27 18:01:09 -04:00
parent e4eb661d3a
commit 4e1430a728
1 changed files with 14 additions and 3 deletions
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17
fs/bcachefs/bcachefs_format.h
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@ -2195,13 +2195,25 @@ struct btree_node {
};
} __packed __aligned(8);
LE64_BITMASK(BTREE_NODE_ID, struct btree_node, flags, 0, 4);
LE64_BITMASK(BTREE_NODE_ID_LO, struct btree_node, flags, 0, 4);
LE64_BITMASK(BTREE_NODE_LEVEL, struct btree_node, flags, 4, 8);
LE64_BITMASK(BTREE_NODE_NEW_EXTENT_OVERWRITE,
struct btree_node, flags, 8, 9);
/* 9-32 unused */
LE64_BITMASK(BTREE_NODE_ID_HI, struct btree_node, flags, 9, 25);
/* 25-32 unused */
LE64_BITMASK(BTREE_NODE_SEQ, struct btree_node, flags, 32, 64);
static inline __u64 BTREE_NODE_ID(struct btree_node *n)
{
return BTREE_NODE_ID_LO(n) | (BTREE_NODE_ID_HI(n) << 4);
}
static inline void SET_BTREE_NODE_ID(struct btree_node *n, u64 v)
{
SET_BTREE_NODE_ID_LO(n, v);
SET_BTREE_NODE_ID_HI(n, v >> 4);
}
struct btree_node_entry {
struct bch_csum csum;
@ -2211,7 +2223,6 @@ struct btree_node_entry {
__u8 pad[22];
__le16 u64s;
__u64 _data[0];
};
};
} __packed __aligned(8);