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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/afs/main.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/afs/main.c')
-rw-r--r--fs/afs/main.c244
1 files changed, 244 insertions, 0 deletions
diff --git a/fs/afs/main.c b/fs/afs/main.c
new file mode 100644
index 000000000..eae288c8d
--- /dev/null
+++ b/fs/afs/main.c
@@ -0,0 +1,244 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* AFS client file system
+ *
+ * Copyright (C) 2002,5 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/completion.h>
+#include <linux/sched.h>
+#include <linux/random.h>
+#include <linux/proc_fs.h>
+#define CREATE_TRACE_POINTS
+#include "internal.h"
+
+MODULE_DESCRIPTION("AFS Client File System");
+MODULE_AUTHOR("Red Hat, Inc.");
+MODULE_LICENSE("GPL");
+
+unsigned afs_debug;
+module_param_named(debug, afs_debug, uint, S_IWUSR | S_IRUGO);
+MODULE_PARM_DESC(debug, "AFS debugging mask");
+
+static char *rootcell;
+
+module_param(rootcell, charp, 0);
+MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
+
+struct workqueue_struct *afs_wq;
+static struct proc_dir_entry *afs_proc_symlink;
+
+#if defined(CONFIG_ALPHA)
+const char afs_init_sysname[] = "alpha_linux26";
+#elif defined(CONFIG_X86_64)
+const char afs_init_sysname[] = "amd64_linux26";
+#elif defined(CONFIG_ARM)
+const char afs_init_sysname[] = "arm_linux26";
+#elif defined(CONFIG_ARM64)
+const char afs_init_sysname[] = "aarch64_linux26";
+#elif defined(CONFIG_X86_32)
+const char afs_init_sysname[] = "i386_linux26";
+#elif defined(CONFIG_IA64)
+const char afs_init_sysname[] = "ia64_linux26";
+#elif defined(CONFIG_PPC64)
+const char afs_init_sysname[] = "ppc64_linux26";
+#elif defined(CONFIG_PPC32)
+const char afs_init_sysname[] = "ppc_linux26";
+#elif defined(CONFIG_S390)
+#ifdef CONFIG_64BIT
+const char afs_init_sysname[] = "s390x_linux26";
+#else
+const char afs_init_sysname[] = "s390_linux26";
+#endif
+#elif defined(CONFIG_SPARC64)
+const char afs_init_sysname[] = "sparc64_linux26";
+#elif defined(CONFIG_SPARC32)
+const char afs_init_sysname[] = "sparc_linux26";
+#else
+const char afs_init_sysname[] = "unknown_linux26";
+#endif
+
+/*
+ * Initialise an AFS network namespace record.
+ */
+static int __net_init afs_net_init(struct net *net_ns)
+{
+ struct afs_sysnames *sysnames;
+ struct afs_net *net = afs_net(net_ns);
+ int ret;
+
+ net->net = net_ns;
+ net->live = true;
+ generate_random_uuid((unsigned char *)&net->uuid);
+
+ INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
+ mutex_init(&net->socket_mutex);
+
+ net->cells = RB_ROOT;
+ init_rwsem(&net->cells_lock);
+ INIT_WORK(&net->cells_manager, afs_manage_cells);
+ timer_setup(&net->cells_timer, afs_cells_timer, 0);
+
+ mutex_init(&net->cells_alias_lock);
+ mutex_init(&net->proc_cells_lock);
+ INIT_HLIST_HEAD(&net->proc_cells);
+
+ seqlock_init(&net->fs_lock);
+ net->fs_servers = RB_ROOT;
+ INIT_LIST_HEAD(&net->fs_probe_fast);
+ INIT_LIST_HEAD(&net->fs_probe_slow);
+ INIT_HLIST_HEAD(&net->fs_proc);
+
+ INIT_HLIST_HEAD(&net->fs_addresses4);
+ INIT_HLIST_HEAD(&net->fs_addresses6);
+ seqlock_init(&net->fs_addr_lock);
+
+ INIT_WORK(&net->fs_manager, afs_manage_servers);
+ timer_setup(&net->fs_timer, afs_servers_timer, 0);
+ INIT_WORK(&net->fs_prober, afs_fs_probe_dispatcher);
+ timer_setup(&net->fs_probe_timer, afs_fs_probe_timer, 0);
+ atomic_set(&net->servers_outstanding, 1);
+
+ ret = -ENOMEM;
+ sysnames = kzalloc(sizeof(*sysnames), GFP_KERNEL);
+ if (!sysnames)
+ goto error_sysnames;
+ sysnames->subs[0] = (char *)&afs_init_sysname;
+ sysnames->nr = 1;
+ refcount_set(&sysnames->usage, 1);
+ net->sysnames = sysnames;
+ rwlock_init(&net->sysnames_lock);
+
+ /* Register the /proc stuff */
+ ret = afs_proc_init(net);
+ if (ret < 0)
+ goto error_proc;
+
+ /* Initialise the cell DB */
+ ret = afs_cell_init(net, rootcell);
+ if (ret < 0)
+ goto error_cell_init;
+
+ /* Create the RxRPC transport */
+ ret = afs_open_socket(net);
+ if (ret < 0)
+ goto error_open_socket;
+
+ return 0;
+
+error_open_socket:
+ net->live = false;
+ afs_fs_probe_cleanup(net);
+ afs_cell_purge(net);
+ afs_purge_servers(net);
+error_cell_init:
+ net->live = false;
+ afs_proc_cleanup(net);
+error_proc:
+ afs_put_sysnames(net->sysnames);
+error_sysnames:
+ net->live = false;
+ return ret;
+}
+
+/*
+ * Clean up and destroy an AFS network namespace record.
+ */
+static void __net_exit afs_net_exit(struct net *net_ns)
+{
+ struct afs_net *net = afs_net(net_ns);
+
+ net->live = false;
+ afs_fs_probe_cleanup(net);
+ afs_cell_purge(net);
+ afs_purge_servers(net);
+ afs_close_socket(net);
+ afs_proc_cleanup(net);
+ afs_put_sysnames(net->sysnames);
+}
+
+static struct pernet_operations afs_net_ops = {
+ .init = afs_net_init,
+ .exit = afs_net_exit,
+ .id = &afs_net_id,
+ .size = sizeof(struct afs_net),
+};
+
+/*
+ * initialise the AFS client FS module
+ */
+static int __init afs_init(void)
+{
+ int ret = -ENOMEM;
+
+ printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
+
+ afs_wq = alloc_workqueue("afs", 0, 0);
+ if (!afs_wq)
+ goto error_afs_wq;
+ afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
+ if (!afs_async_calls)
+ goto error_async;
+ afs_lock_manager = alloc_workqueue("kafs_lockd", WQ_MEM_RECLAIM, 0);
+ if (!afs_lock_manager)
+ goto error_lockmgr;
+
+ ret = register_pernet_device(&afs_net_ops);
+ if (ret < 0)
+ goto error_net;
+
+ /* register the filesystems */
+ ret = afs_fs_init();
+ if (ret < 0)
+ goto error_fs;
+
+ afs_proc_symlink = proc_symlink("fs/afs", NULL, "../self/net/afs");
+ if (!afs_proc_symlink) {
+ ret = -ENOMEM;
+ goto error_proc;
+ }
+
+ return ret;
+
+error_proc:
+ afs_fs_exit();
+error_fs:
+ unregister_pernet_device(&afs_net_ops);
+error_net:
+ destroy_workqueue(afs_lock_manager);
+error_lockmgr:
+ destroy_workqueue(afs_async_calls);
+error_async:
+ destroy_workqueue(afs_wq);
+error_afs_wq:
+ rcu_barrier();
+ printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
+ return ret;
+}
+
+/* XXX late_initcall is kludgy, but the only alternative seems to create
+ * a transport upon the first mount, which is worse. Or is it?
+ */
+late_initcall(afs_init); /* must be called after net/ to create socket */
+
+/*
+ * clean up on module removal
+ */
+static void __exit afs_exit(void)
+{
+ printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
+
+ proc_remove(afs_proc_symlink);
+ afs_fs_exit();
+ unregister_pernet_device(&afs_net_ops);
+ destroy_workqueue(afs_lock_manager);
+ destroy_workqueue(afs_async_calls);
+ destroy_workqueue(afs_wq);
+ afs_clean_up_permit_cache();
+ rcu_barrier();
+}
+
+module_exit(afs_exit);