diff options
Diffstat (limited to 'fs/orangefs/orangefs-mod.c')
-rw-r--r-- | fs/orangefs/orangefs-mod.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/fs/orangefs/orangefs-mod.c b/fs/orangefs/orangefs-mod.c new file mode 100644 index 000000000..85ef87245 --- /dev/null +++ b/fs/orangefs/orangefs-mod.c @@ -0,0 +1,234 @@ +/* + * (C) 2001 Clemson University and The University of Chicago + * + * Changes by Acxiom Corporation to add proc file handler for pvfs2 client + * parameters, Copyright Acxiom Corporation, 2005. + * + * See COPYING in top-level directory. + */ + +#include "protocol.h" +#include "orangefs-kernel.h" +#include "orangefs-debugfs.h" +#include "orangefs-sysfs.h" + +/* ORANGEFS_VERSION is a ./configure define */ +#ifndef ORANGEFS_VERSION +#define ORANGEFS_VERSION "upstream" +#endif + +/* + * global variables declared here + */ + +struct orangefs_stats orangefs_stats; + +/* the size of the hash tables for ops in progress */ +int hash_table_size = 509; + +static ulong module_parm_debug_mask; +__u64 orangefs_gossip_debug_mask; +int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS; +int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS; +int orangefs_dcache_timeout_msecs = 50; +int orangefs_getattr_timeout_msecs = 50; + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("ORANGEFS Development Team"); +MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS"); +MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)"); +MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds"); +MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds"); +MODULE_PARM_DESC(hash_table_size, + "size of hash table for operations in progress"); + +static struct file_system_type orangefs_fs_type = { + .name = "pvfs2", + .mount = orangefs_mount, + .kill_sb = orangefs_kill_sb, + .owner = THIS_MODULE, +}; + +module_param(hash_table_size, int, 0); +module_param(module_parm_debug_mask, ulong, 0644); +module_param(op_timeout_secs, int, 0); +module_param(slot_timeout_secs, int, 0); + +/* + * Blocks non-priority requests from being queued for servicing. This + * could be used for protecting the request list data structure, but + * for now it's only being used to stall the op addition to the request + * list + */ +DEFINE_MUTEX(orangefs_request_mutex); + +/* hash table for storing operations waiting for matching downcall */ +struct list_head *orangefs_htable_ops_in_progress; +DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock); + +/* list for queueing upcall operations */ +LIST_HEAD(orangefs_request_list); + +/* used to protect the above orangefs_request_list */ +DEFINE_SPINLOCK(orangefs_request_list_lock); + +/* used for incoming request notification */ +DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq); + +static int __init orangefs_init(void) +{ + int ret = -1; + __u32 i = 0; + + if (op_timeout_secs < 0) + op_timeout_secs = 0; + + if (slot_timeout_secs < 0) + slot_timeout_secs = 0; + + /* initialize global book keeping data structures */ + ret = op_cache_initialize(); + if (ret < 0) + goto out; + + ret = orangefs_inode_cache_initialize(); + if (ret < 0) + goto cleanup_op; + + orangefs_htable_ops_in_progress = + kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL); + if (!orangefs_htable_ops_in_progress) { + ret = -ENOMEM; + goto cleanup_inode; + } + + /* initialize a doubly linked at each hash table index */ + for (i = 0; i < hash_table_size; i++) + INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]); + + ret = fsid_key_table_initialize(); + if (ret < 0) + goto cleanup_progress_table; + + /* + * Build the contents of /sys/kernel/debug/orangefs/debug-help + * from the keywords in the kernel keyword/mask array. + * + * The keywords in the client keyword/mask array are + * unknown at boot time. + * + * orangefs_prepare_debugfs_help_string will be used again + * later to rebuild the debug-help-string after the client starts + * and passes along the needed info. The argument signifies + * which time orangefs_prepare_debugfs_help_string is being + * called. + */ + ret = orangefs_prepare_debugfs_help_string(1); + if (ret) + goto cleanup_key_table; + + ret = orangefs_debugfs_init(module_parm_debug_mask); + if (ret) + goto debugfs_init_failed; + + ret = orangefs_sysfs_init(); + if (ret) + goto sysfs_init_failed; + + /* Initialize the orangefsdev subsystem. */ + ret = orangefs_dev_init(); + if (ret < 0) { + gossip_err("%s: could not initialize device subsystem %d!\n", + __func__, + ret); + goto cleanup_device; + } + + ret = register_filesystem(&orangefs_fs_type); + if (ret == 0) { + pr_info("%s: module version %s loaded\n", + __func__, + ORANGEFS_VERSION); + ret = 0; + goto out; + } + + orangefs_sysfs_exit(); + +cleanup_device: + orangefs_dev_cleanup(); + +sysfs_init_failed: + +debugfs_init_failed: + orangefs_debugfs_cleanup(); + +cleanup_key_table: + fsid_key_table_finalize(); + +cleanup_progress_table: + kfree(orangefs_htable_ops_in_progress); + +cleanup_inode: + orangefs_inode_cache_finalize(); + +cleanup_op: + op_cache_finalize(); + +out: + return ret; +} + +static void __exit orangefs_exit(void) +{ + int i = 0; + gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n"); + + unregister_filesystem(&orangefs_fs_type); + orangefs_debugfs_cleanup(); + orangefs_sysfs_exit(); + fsid_key_table_finalize(); + orangefs_dev_cleanup(); + BUG_ON(!list_empty(&orangefs_request_list)); + for (i = 0; i < hash_table_size; i++) + BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i])); + + orangefs_inode_cache_finalize(); + op_cache_finalize(); + + kfree(orangefs_htable_ops_in_progress); + + pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION); +} + +/* + * What we do in this function is to walk the list of operations + * that are in progress in the hash table and mark them as purged as well. + */ +void purge_inprogress_ops(void) +{ + int i; + + for (i = 0; i < hash_table_size; i++) { + struct orangefs_kernel_op_s *op; + struct orangefs_kernel_op_s *next; + + spin_lock(&orangefs_htable_ops_in_progress_lock); + list_for_each_entry_safe(op, + next, + &orangefs_htable_ops_in_progress[i], + list) { + set_op_state_purged(op); + gossip_debug(GOSSIP_DEV_DEBUG, + "%s: op:%s: op_state:%d: process:%s:\n", + __func__, + get_opname_string(op), + op->op_state, + current->comm); + } + spin_unlock(&orangefs_htable_ops_in_progress_lock); + } +} + +module_init(orangefs_init); +module_exit(orangefs_exit); |