From: John L. Hammond Date: Mon, 2 Feb 2015 02:52:08 +0000 (-0500) Subject: staging/lustre/llite: remove llite proc root on init failure X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=081fa9dffcde7c9fc4d9fdf18fe277dfa3f675aa;p=linux-beck.git staging/lustre/llite: remove llite proc root on init failure In init_lustre_lite() ensure that /proc/fs/lustre/llite is removed in case of failure. Generally rework the cleanup code in this function. Signed-off-by: John L. Hammond Reviewed-on: http://review.whamcloud.com/6420 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3331 Reviewed-by: Bob Glossman Reviewed-by: James Simmons Signed-off-by: Oleg Drokin Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/staging/lustre/lustre/llite/super25.c b/drivers/staging/lustre/lustre/llite/super25.c index 6aff155651cc..7c1e02a031ba 100644 --- a/drivers/staging/lustre/lustre/llite/super25.c +++ b/drivers/staging/lustre/lustre/llite/super25.c @@ -72,21 +72,6 @@ static void ll_destroy_inode(struct inode *inode) call_rcu(&inode->i_rcu, ll_inode_destroy_callback); } -static int ll_init_inodecache(void) -{ - ll_inode_cachep = kmem_cache_create("lustre_inode_cache", - sizeof(struct ll_inode_info), - 0, SLAB_HWCACHE_ALIGN, NULL); - if (ll_inode_cachep == NULL) - return -ENOMEM; - return 0; -} - -static void ll_destroy_inodecache(void) -{ - kmem_cache_destroy(ll_inode_cachep); -} - /* exported operations */ struct super_operations lustre_super_operations = { .alloc_inode = ll_alloc_inode, @@ -104,9 +89,10 @@ void lustre_register_client_process_config(int (*cpc)(struct lustre_cfg *lcfg)); static int __init init_lustre_lite(void) { - int i, rc, seed[2]; - struct timeval tv; + struct proc_dir_entry *entry; lnet_process_id_t lnet_id; + struct timeval tv; + int i, rc, seed[2]; CLASSERT(sizeof(LUSTRE_VOLATILE_HDR) == LUSTRE_VOLATILE_HDR_LEN + 1); @@ -116,59 +102,52 @@ static int __init init_lustre_lite(void) CDEBUG(D_INFO, "Lustre client module (%p).\n", &lustre_super_operations); - rc = ll_init_inodecache(); - if (rc) - return -ENOMEM; + rc = -ENOMEM; + ll_inode_cachep = kmem_cache_create("lustre_inode_cache", + sizeof(struct ll_inode_info), + 0, SLAB_HWCACHE_ALIGN, NULL); + if (ll_inode_cachep == NULL) + goto out_cache; + ll_file_data_slab = kmem_cache_create("ll_file_data", sizeof(struct ll_file_data), 0, SLAB_HWCACHE_ALIGN, NULL); - if (ll_file_data_slab == NULL) { - ll_destroy_inodecache(); - return -ENOMEM; - } + if (ll_file_data_slab == NULL) + goto out_cache; ll_remote_perm_cachep = kmem_cache_create("ll_remote_perm_cache", sizeof(struct ll_remote_perm), 0, 0, NULL); - if (ll_remote_perm_cachep == NULL) { - kmem_cache_destroy(ll_file_data_slab); - ll_file_data_slab = NULL; - ll_destroy_inodecache(); - return -ENOMEM; - } + if (ll_remote_perm_cachep == NULL) + goto out_cache; ll_rmtperm_hash_cachep = kmem_cache_create("ll_rmtperm_hash_cache", REMOTE_PERM_HASHSIZE * sizeof(struct list_head), 0, 0, NULL); - if (ll_rmtperm_hash_cachep == NULL) { - kmem_cache_destroy(ll_remote_perm_cachep); - ll_remote_perm_cachep = NULL; - kmem_cache_destroy(ll_file_data_slab); - ll_file_data_slab = NULL; - ll_destroy_inodecache(); - return -ENOMEM; + if (ll_rmtperm_hash_cachep == NULL) + goto out_cache; + + entry = lprocfs_register("llite", proc_lustre_root, NULL, NULL); + if (IS_ERR(entry)) { + rc = PTR_ERR(entry); + CERROR("cannot register '/proc/fs/lustre/llite': rc = %d\n", + rc); + goto out_cache; } - proc_lustre_fs_root = proc_lustre_root ? - lprocfs_register("llite", proc_lustre_root, NULL, NULL) : NULL; - - lustre_register_client_fill_super(ll_fill_super); - lustre_register_kill_super_cb(ll_kill_super); - - lustre_register_client_process_config(ll_process_config); + proc_lustre_fs_root = entry; cfs_get_random_bytes(seed, sizeof(seed)); - /* Nodes with small feet have little entropy - * the NID for this node gives the most entropy in the low bits */ - for (i = 0; ; i++) { - if (LNetGetId(i, &lnet_id) == -ENOENT) { + /* Nodes with small feet have little entropy. The NID for this + * node gives the most entropy in the low bits */ + for (i = 0;; i++) { + if (LNetGetId(i, &lnet_id) == -ENOENT) break; - } - if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND) { + + if (LNET_NETTYP(LNET_NIDNET(lnet_id.nid)) != LOLND) seed[0] ^= LNET_NIDADDR(lnet_id.nid); - } } do_gettimeofday(&tv); @@ -177,20 +156,54 @@ static int __init init_lustre_lite(void) init_timer(&ll_capa_timer); ll_capa_timer.function = ll_capa_timer_callback; rc = ll_capa_thread_start(); - /* - * XXX normal cleanup is needed here. - */ - if (rc == 0) - rc = vvp_global_init(); + if (rc != 0) + goto out_proc; - if (rc == 0) - rc = ll_xattr_init(); + rc = vvp_global_init(); + if (rc != 0) + goto out_capa; + + rc = ll_xattr_init(); + if (rc != 0) + goto out_vvp; + + lustre_register_client_fill_super(ll_fill_super); + lustre_register_kill_super_cb(ll_kill_super); + lustre_register_client_process_config(ll_process_config); + + return 0; + +out_vvp: + vvp_global_fini(); +out_capa: + del_timer(&ll_capa_timer); + ll_capa_thread_stop(); +out_proc: + lprocfs_remove(&proc_lustre_fs_root); +out_cache: + if (ll_inode_cachep != NULL) + kmem_cache_destroy(ll_inode_cachep); + + if (ll_file_data_slab != NULL) + kmem_cache_destroy(ll_file_data_slab); + + if (ll_remote_perm_cachep != NULL) + kmem_cache_destroy(ll_remote_perm_cachep); + + if (ll_rmtperm_hash_cachep != NULL) + kmem_cache_destroy(ll_rmtperm_hash_cachep); return rc; } static void __exit exit_lustre_lite(void) { + lustre_register_client_fill_super(NULL); + lustre_register_kill_super_cb(NULL); + lustre_register_client_process_config(NULL); + + lprocfs_remove(&proc_lustre_fs_root); + ll_xattr_fini(); vvp_global_fini(); del_timer(&ll_capa_timer); @@ -199,22 +212,12 @@ static void __exit exit_lustre_lite(void) "client remaining capa count %d\n", capa_count[CAPA_SITE_CLIENT]); - lustre_register_client_fill_super(NULL); - lustre_register_kill_super_cb(NULL); - - lustre_register_client_process_config(NULL); - - ll_destroy_inodecache(); - + kmem_cache_destroy(ll_inode_cachep); kmem_cache_destroy(ll_rmtperm_hash_cachep); - ll_rmtperm_hash_cachep = NULL; kmem_cache_destroy(ll_remote_perm_cachep); - ll_remote_perm_cachep = NULL; kmem_cache_destroy(ll_file_data_slab); - if (proc_lustre_fs_root && !IS_ERR(proc_lustre_fs_root)) - lprocfs_remove(&proc_lustre_fs_root); } MODULE_AUTHOR("Sun Microsystems, Inc. ");