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add per-account quota for total message size disk usage

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so a single user cannot fill up the disk.
by default, there is (still) no limit. a default can be set in the config file
for all accounts, and a per-account max size can be set that would override any
global setting.

this does not take into account disk usage of the index database. and also not
of any file system overhead.
This commit is contained in:
Mechiel Lukkien
2023-12-20 20:54:12 +01:00
parent e048d0962b
commit d73bda7511
28 changed files with 434 additions and 50 deletions
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28
imapserver/server.go
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@ -2750,13 +2750,20 @@ func (c *conn) cmdAppend(tag, cmd string, p *parser) {
Size: mw.Size,
}
ok, maxSize, err := c.account.CanAddMessageSize(tx, m.Size)
xcheckf(err, "checking quota")
if !ok {
// ../rfc/9051:5155
xusercodeErrorf("OVERQUOTA", "account over maximum total message size %d", maxSize)
}
mb.Add(m.MailboxCounts())
// Update mailbox before delivering, which updates uidnext which we mustn't overwrite.
err = tx.Update(&mb)
xcheckf(err, "updating mailbox counts")
err := c.account.DeliverMessage(c.log, tx, &m, msgFile, true, false, false)
err = c.account.DeliverMessage(c.log, tx, &m, msgFile, true, false, false, true)
xcheckf(err, "delivering message")
})
@ -2923,10 +2930,12 @@ func (c *conn) xexpunge(uidSet *numSet, missingMailboxOK bool) (remove []store.M
removeIDs := make([]int64, len(remove))
anyIDs := make([]any, len(remove))
var totalSize int64
for i, m := range remove {
removeIDs[i] = m.ID
anyIDs[i] = m.ID
mb.Sub(m.MailboxCounts())
totalSize += m.Size
// Update "remove", because RetrainMessage below will save the message.
remove[i].Expunged = true
remove[i].ModSeq = modseq
@ -2947,6 +2956,9 @@ func (c *conn) xexpunge(uidSet *numSet, missingMailboxOK bool) (remove []store.M
err = tx.Update(&mb)
xcheckf(err, "updating mailbox counts")
err = c.account.AddMessageSize(c.log, tx, -totalSize)
xcheckf(err, "updating disk usage")
// Mark expunged messages as not needing training, then retrain them, so if they
// were trained, they get untrained.
for i := range remove {
@ -3208,6 +3220,20 @@ func (c *conn) cmdxCopy(isUID bool, tag, cmd string, p *parser) {
xserverErrorf("uid and message mismatch")
}
// See if quota allows copy.
var totalSize int64
for _, m := range xmsgs {
totalSize += m.Size
}
if ok, maxSize, err := c.account.CanAddMessageSize(tx, totalSize); err != nil {
xcheckf(err, "checking quota")
} else if !ok {
// ../rfc/9051:5155
xusercodeErrorf("OVERQUOTA", "account over maximum total message size %d", maxSize)
}
err = c.account.AddMessageSize(c.log, tx, totalSize)
xcheckf(err, "updating disk usage")
msgs := map[store.UID]store.Message{}
for _, m := range xmsgs {
msgs[m.UID] = m