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/*
* (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;
ret = bdi_init(&orangefs_backing_dev_info);
if (ret)
return ret;
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 err;
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) {
gossip_err("Failed to initialize op hashtable");
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();
err:
bdi_destroy(&orangefs_backing_dev_info);
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);
bdi_destroy(&orangefs_backing_dev_info);
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);
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