From d47d08c8ca052df3d9fde7cfff518660335b16e7 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 16 Mar 2018 23:32:51 +0000 Subject: [PATCH] sctp: use proc_remove_subtree() use proc_remove_subtree() for subtree removal, both on setup failure halfway through and on teardown. No need to make simple things complex... Signed-off-by: Al Viro Signed-off-by: David S. Miller --- include/net/sctp/sctp.h | 11 +---- net/sctp/objcnt.c | 8 ---- net/sctp/proc.c | 90 ++++++++++------------------------------- net/sctp/protocol.c | 59 +++------------------------ 4 files changed, 28 insertions(+), 140 deletions(-) diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h index f7ae6b0a21d0..72c5b8fc3232 100644 --- a/include/net/sctp/sctp.h +++ b/include/net/sctp/sctp.h @@ -180,14 +180,7 @@ struct sctp_transport *sctp_epaddr_lookup_transport( /* * sctp/proc.c */ -int sctp_snmp_proc_init(struct net *net); -void sctp_snmp_proc_exit(struct net *net); -int sctp_eps_proc_init(struct net *net); -void sctp_eps_proc_exit(struct net *net); -int sctp_assocs_proc_init(struct net *net); -void sctp_assocs_proc_exit(struct net *net); -int sctp_remaddr_proc_init(struct net *net); -void sctp_remaddr_proc_exit(struct net *net); +int __net_init sctp_proc_init(struct net *net); /* * sctp/offload.c @@ -318,7 +311,6 @@ atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0) {.label= #name, .counter= &sctp_dbg_objcnt_## name} void sctp_dbg_objcnt_init(struct net *); -void sctp_dbg_objcnt_exit(struct net *); #else @@ -326,7 +318,6 @@ void sctp_dbg_objcnt_exit(struct net *); #define SCTP_DBG_OBJCNT_DEC(name) static inline void sctp_dbg_objcnt_init(struct net *net) { return; } -static inline void sctp_dbg_objcnt_exit(struct net *net) { return; } #endif /* CONFIG_SCTP_DBG_OBJCOUNT */ diff --git a/net/sctp/objcnt.c b/net/sctp/objcnt.c index aeea6da81441..fd2684ad94c8 100644 --- a/net/sctp/objcnt.c +++ b/net/sctp/objcnt.c @@ -130,11 +130,3 @@ void sctp_dbg_objcnt_init(struct net *net) if (!ent) pr_warn("sctp_dbg_objcnt: Unable to create /proc entry.\n"); } - -/* Cleanup the objcount entry in the proc filesystem. */ -void sctp_dbg_objcnt_exit(struct net *net) -{ - remove_proc_entry("sctp_dbg_objcnt", net->sctp.proc_net_sctp); -} - - diff --git a/net/sctp/proc.c b/net/sctp/proc.c index 537545ebcb0e..17d0155d9de3 100644 --- a/net/sctp/proc.c +++ b/net/sctp/proc.c @@ -101,25 +101,6 @@ static const struct file_operations sctp_snmp_seq_fops = { .release = single_release_net, }; -/* Set up the proc fs entry for 'snmp' object. */ -int __net_init sctp_snmp_proc_init(struct net *net) -{ - struct proc_dir_entry *p; - - p = proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp, - &sctp_snmp_seq_fops); - if (!p) - return -ENOMEM; - - return 0; -} - -/* Cleanup the proc fs entry for 'snmp' object. */ -void sctp_snmp_proc_exit(struct net *net) -{ - remove_proc_entry("snmp", net->sctp.proc_net_sctp); -} - /* Dump local addresses of an association/endpoint. */ static void sctp_seq_dump_local_addrs(struct seq_file *seq, struct sctp_ep_common *epb) { @@ -259,25 +240,6 @@ static const struct file_operations sctp_eps_seq_fops = { .release = seq_release_net, }; -/* Set up the proc fs entry for 'eps' object. */ -int __net_init sctp_eps_proc_init(struct net *net) -{ - struct proc_dir_entry *p; - - p = proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp, - &sctp_eps_seq_fops); - if (!p) - return -ENOMEM; - - return 0; -} - -/* Cleanup the proc fs entry for 'eps' object. */ -void sctp_eps_proc_exit(struct net *net) -{ - remove_proc_entry("eps", net->sctp.proc_net_sctp); -} - struct sctp_ht_iter { struct seq_net_private p; struct rhashtable_iter hti; @@ -390,25 +352,6 @@ static const struct file_operations sctp_assocs_seq_fops = { .release = seq_release_net, }; -/* Set up the proc fs entry for 'assocs' object. */ -int __net_init sctp_assocs_proc_init(struct net *net) -{ - struct proc_dir_entry *p; - - p = proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp, - &sctp_assocs_seq_fops); - if (!p) - return -ENOMEM; - - return 0; -} - -/* Cleanup the proc fs entry for 'assocs' object. */ -void sctp_assocs_proc_exit(struct net *net) -{ - remove_proc_entry("assocs", net->sctp.proc_net_sctp); -} - static int sctp_remaddr_seq_show(struct seq_file *seq, void *v) { struct sctp_association *assoc; @@ -488,12 +431,6 @@ static const struct seq_operations sctp_remaddr_ops = { .show = sctp_remaddr_seq_show, }; -/* Cleanup the proc fs entry for 'remaddr' object. */ -void sctp_remaddr_proc_exit(struct net *net) -{ - remove_proc_entry("remaddr", net->sctp.proc_net_sctp); -} - static int sctp_remaddr_seq_open(struct inode *inode, struct file *file) { return seq_open_net(inode, file, &sctp_remaddr_ops, @@ -507,13 +444,28 @@ static const struct file_operations sctp_remaddr_seq_fops = { .release = seq_release_net, }; -int __net_init sctp_remaddr_proc_init(struct net *net) +/* Set up the proc fs entry for the SCTP protocol. */ +int __net_init sctp_proc_init(struct net *net) { - struct proc_dir_entry *p; - - p = proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp, - &sctp_remaddr_seq_fops); - if (!p) + net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net); + if (!net->sctp.proc_net_sctp) return -ENOMEM; + if (!proc_create("snmp", S_IRUGO, net->sctp.proc_net_sctp, + &sctp_snmp_seq_fops)) + goto cleanup; + if (!proc_create("eps", S_IRUGO, net->sctp.proc_net_sctp, + &sctp_eps_seq_fops)) + goto cleanup; + if (!proc_create("assocs", S_IRUGO, net->sctp.proc_net_sctp, + &sctp_assocs_seq_fops)) + goto cleanup; + if (!proc_create("remaddr", S_IRUGO, net->sctp.proc_net_sctp, + &sctp_remaddr_seq_fops)) + goto cleanup; return 0; + +cleanup: + remove_proc_subtree("sctp", net->proc_net); + net->sctp.proc_net_sctp = NULL; + return -ENOMEM; } diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c index 606361ee9e4a..493b817f6a2a 100644 --- a/net/sctp/protocol.c +++ b/net/sctp/protocol.c @@ -80,56 +80,6 @@ long sysctl_sctp_mem[3]; int sysctl_sctp_rmem[3]; int sysctl_sctp_wmem[3]; -/* Set up the proc fs entry for the SCTP protocol. */ -static int __net_init sctp_proc_init(struct net *net) -{ -#ifdef CONFIG_PROC_FS - net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net); - if (!net->sctp.proc_net_sctp) - goto out_proc_net_sctp; - if (sctp_snmp_proc_init(net)) - goto out_snmp_proc_init; - if (sctp_eps_proc_init(net)) - goto out_eps_proc_init; - if (sctp_assocs_proc_init(net)) - goto out_assocs_proc_init; - if (sctp_remaddr_proc_init(net)) - goto out_remaddr_proc_init; - - return 0; - -out_remaddr_proc_init: - sctp_assocs_proc_exit(net); -out_assocs_proc_init: - sctp_eps_proc_exit(net); -out_eps_proc_init: - sctp_snmp_proc_exit(net); -out_snmp_proc_init: - remove_proc_entry("sctp", net->proc_net); - net->sctp.proc_net_sctp = NULL; -out_proc_net_sctp: - return -ENOMEM; -#endif /* CONFIG_PROC_FS */ - return 0; -} - -/* Clean up the proc fs entry for the SCTP protocol. - * Note: Do not make this __exit as it is used in the init error - * path. - */ -static void sctp_proc_exit(struct net *net) -{ -#ifdef CONFIG_PROC_FS - sctp_snmp_proc_exit(net); - sctp_eps_proc_exit(net); - sctp_assocs_proc_exit(net); - sctp_remaddr_proc_exit(net); - - remove_proc_entry("sctp", net->proc_net); - net->sctp.proc_net_sctp = NULL; -#endif -} - /* Private helper to extract ipv4 address and stash them in * the protocol structure. */ @@ -1285,10 +1235,12 @@ static int __net_init sctp_defaults_init(struct net *net) if (status) goto err_init_mibs; +#ifdef CONFIG_PROC_FS /* Initialize proc fs directory. */ status = sctp_proc_init(net); if (status) goto err_init_proc; +#endif sctp_dbg_objcnt_init(net); @@ -1320,9 +1272,10 @@ static void __net_exit sctp_defaults_exit(struct net *net) sctp_free_addr_wq(net); sctp_free_local_addr_list(net); - sctp_dbg_objcnt_exit(net); - - sctp_proc_exit(net); +#ifdef CONFIG_PROC_FS + remove_proc_subtree("sctp", net->proc_net); + net->sctp.proc_net_sctp = NULL; +#endif cleanup_sctp_mibs(net); sctp_sysctl_net_unregister(net); }