diff options
| author | Phil Sutter <phil@nwl.cc> | 2023-12-21 14:31:58 +0100 |
|---|---|---|
| committer | Florian Westphal <fw@strlen.de> | 2024-01-29 15:43:20 +0100 |
| commit | da5141bbe0c2693d85f14a89ee991921904f4d0c (patch) | |
| tree | c969691e863bd25a57a2566f236be2c278b655ea /net/netfilter/nf_tables_api.c | |
| parent | 941988af572434e4aa93fb0f2f509f92adfd691a (diff) | |
netfilter: nf_tables: Introduce NFT_TABLE_F_PERSIST
This companion flag to NFT_TABLE_F_OWNER requests the kernel to keep the
table around after the process has exited. It marks such table as
orphaned (by dropping OWNER flag but keeping PERSIST flag in place),
which opens it for other processes to manipulate. For the sake of
simplicity, PERSIST flag may not be altered though.
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'net/netfilter/nf_tables_api.c')
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index c537104411e7..6a96f0003faa 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -1219,6 +1219,9 @@ static int nf_tables_updtable(struct nft_ctx *ctx) flags & NFT_TABLE_F_OWNER)) return -EOPNOTSUPP; + if ((flags ^ ctx->table->flags) & NFT_TABLE_F_PERSIST) + return -EOPNOTSUPP; + /* No dormant off/on/off/on games in single transaction */ if (ctx->table->flags & __NFT_TABLE_F_UPDATE) return -EINVAL; @@ -11345,6 +11348,10 @@ again: list_for_each_entry(table, &nft_net->tables, list) { if (nft_table_has_owner(table) && n->portid == table->nlpid) { + if (table->flags & NFT_TABLE_F_PERSIST) { + table->flags &= ~NFT_TABLE_F_OWNER; + continue; + } __nft_release_hook(net, table); list_del_rcu(&table->list); to_delete[deleted++] = table; |