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Replace database locks with transactions (#1701)

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This commits removes the locks used to guard data integrity for the
database and replaces them with Transactions, turns out that SQL had
a way to deal with this all along.

This reduces the complexity we had with multiple locks that might stack
or recurse (database, nofitifer, mapper). All notifications and state
updates are now triggered _after_ a database change.


Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
This commit is contained in:
Kristoffer Dalby 2024-02-08 17:28:19 +01:00 • committed by GitHub
parent cbf57e27a7
commit 83769ba715
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GPG key ID: B5690EEEBB952194
32 changed files with 1496 additions and 1128 deletions
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47
hscontrol/policy/acls.go
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@ -905,32 +905,39 @@ func (pol *ACLPolicy) TagsOfNode(
validTags := make([]string, 0)
invalidTags := make([]string, 0)
// TODO(kradalby): Why is this sometimes nil? coming from tailNode?
if node == nil {
return validTags, invalidTags
}
validTagMap := make(map[string]bool)
invalidTagMap := make(map[string]bool)
for _, tag := range node.Hostinfo.RequestTags {
owners, err := expandOwnersFromTag(pol, tag)
if errors.Is(err, ErrInvalidTag) {
invalidTagMap[tag] = true
if node.Hostinfo != nil {
for _, tag := range node.Hostinfo.RequestTags {
owners, err := expandOwnersFromTag(pol, tag)
if errors.Is(err, ErrInvalidTag) {
invalidTagMap[tag] = true
continue
}
var found bool
for _, owner := range owners {
if node.User.Name == owner {
found = true
continue
}
var found bool
for _, owner := range owners {
if node.User.Name == owner {
found = true
}
}
if found {
validTagMap[tag] = true
} else {
invalidTagMap[tag] = true
}
}
if found {
validTagMap[tag] = true
} else {
invalidTagMap[tag] = true
for tag := range invalidTagMap {
invalidTags = append(invalidTags, tag)
}
for tag := range validTagMap {
validTags = append(validTags, tag)
}
}
for tag := range invalidTagMap {
invalidTags = append(invalidTags, tag)
}
for tag := range validTagMap {
validTags = append(validTags, tag)
}
return validTags, invalidTags