/*
* (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 "pvfs2-kernel.h"
#include "pvfs2-debugfs.h"
#include "pvfs2-sysfs.h"
/* PVFS2_VERSION is a ./configure define */
#ifndef PVFS2_VERSION
#define PVFS2_VERSION "Unknown"
#endif
/*
* global variables declared here
*/
/* array of client debug keyword/mask values */
struct client_debug_mask *cdm_array;
int cdm_element_count;
char kernel_debug_string[PVFS2_MAX_DEBUG_STRING_LEN] = "none";
char client_debug_string[PVFS2_MAX_DEBUG_STRING_LEN];
char client_debug_array_string[PVFS2_MAX_DEBUG_STRING_LEN];
char *debug_help_string;
int help_string_initialized;
struct dentry *help_file_dentry;
struct dentry *client_debug_dentry;
struct dentry *debug_dir;
int client_verbose_index;
int client_all_index;
struct pvfs2_stats g_pvfs2_stats;
/* the size of the hash tables for ops in progress */
int hash_table_size = 509;
static ulong module_parm_debug_mask;
__u64 gossip_debug_mask;
struct client_debug_mask client_debug_mask = { NULL, 0, 0 };
unsigned int kernel_mask_set_mod_init; /* implicitly false */
int op_timeout_secs = PVFS2_DEFAULT_OP_TIMEOUT_SECS;
int slot_timeout_secs = PVFS2_DEFAULT_SLOT_TIMEOUT_SECS;
MODULE_LICENSE("GPL");
MODULE_AUTHOR("PVFS2 Development Team");
MODULE_DESCRIPTION("The Linux Kernel VFS interface to PVFS2");
MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see pvfs2-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 pvfs2_fs_type = {
.name = "pvfs2",
.mount = pvfs2_mount,
.kill_sb = pvfs2_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);
/* synchronizes the request device file */
struct mutex devreq_mutex;
/*
* 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
*/
struct mutex request_mutex;
/* hash table for storing operations waiting for matching downcall */
struct list_head *htable_ops_in_progress;
DEFINE_SPINLOCK(htable_ops_in_progress_lock);
/* list for queueing upcall operations */
LIST_HEAD(pvfs2_request_list);
/* used to protect the above pvfs2_request_list */
DEFINE_SPINLOCK(pvfs2_request_list_lock);
/* used for incoming request notification */
DECLARE_WAIT_QUEUE_HEAD(pvfs2_request_list_waitq);
static int __init pvfs2_init(void)
{
int ret = -1;
__u32 i = 0;
/* convert input debug mask to a 64-bit unsigned integer */
gossip_debug_mask = (unsigned long long) module_parm_debug_mask;
/*
* set the kernel's gossip debug string; invalid mask values will
* be ignored.
*/
debug_mask_to_string(&gossip_debug_mask, 0);
/* remove any invalid values from the mask */
debug_string_to_mask(kernel_debug_string, &gossip_debug_mask, 0);
/*
* if the mask has a non-zero value, then indicate that the mask
* was set when the kernel module was loaded. The pvfs2 dev ioctl
* command will look at this boolean to determine if the kernel's
* debug mask should be overwritten when the client-core is started.
*/
if (gossip_debug_mask != 0)
kernel_mask_set_mod_init = true;
/* print information message to the system log */
pr_info("pvfs2: pvfs2_init called with debug mask: :%s: :%llx:\n",
kernel_debug_string,
(unsigned long long)gossip_debug_mask);
ret = bdi_init(&pvfs2_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 = dev_req_cache_initialize();
if (ret < 0)
goto cleanup_op;
ret = pvfs2_inode_cache_initialize();
if (ret < 0)
goto cleanup_req;
ret = kiocb_cache_initialize();
if (ret < 0)
goto cleanup_inode;
/* Initialize the pvfsdev subsystem. */
ret = pvfs2_dev_init();
if (ret < 0) {
gossip_err("pvfs2: could not initialize device subsystem %d!\n",
ret);
goto cleanup_kiocb;
}
mutex_init(&devreq_mutex);
mutex_init(&request_mutex);
htable_ops_in_progress =
kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL);
if (!htable_ops_in_progress) {
gossip_err("Failed to initialize op hashtable");
ret = -ENOMEM;
goto cleanup_device;
}
/* initialize a doubly linked at each hash table index */
for (i = 0; i < hash_table_size; i++)
INIT_LIST_HEAD(&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 file 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 out;
pvfs2_debugfs_init();
pvfs2_kernel_debug_init();
orangefs_sysfs_init();
ret = register_filesystem(&pvfs2_fs_type);
if (ret == 0) {
pr_info("pvfs2: module version %s loaded\n", PVFS2_VERSION);
return 0;
}
pvfs2_debugfs_cleanup();
orangefs_sysfs_exit();
fsid_key_table_finalize();
cleanup_progress_table:
kfree(htable_ops_in_progress);
cleanup_device:
pvfs2_dev_cleanup();
cleanup_kiocb:
kiocb_cache_finalize();
cleanup_inode:
pvfs2_inode_cache_finalize();
cleanup_req:
dev_req_cache_finalize();
cleanup_op:
op_cache_finalize();
err:
bdi_destroy(&pvfs2_backing_dev_info);
out:
return ret;
}
static void __exit pvfs2_exit(void)
{
int i = 0;
struct pvfs2_kernel_op_s *cur_op = NULL;
gossip_debug(GOSSIP_INIT_DEBUG, "pvfs2: pvfs2_exit called\n");
unregister_filesystem(&pvfs2_fs_type);
pvfs2_debugfs_cleanup();
orangefs_sysfs_exit();
fsid_key_table_finalize();
pvfs2_dev_cleanup();
/* clear out all pending upcall op requests */
spin_lock(&pvfs2_request_list_lock);
while (!list_empty(&pvfs2_request_list)) {
cur_op = list_entry(pvfs2_request_list.next,
struct pvfs2_kernel_op_s,
list);
list_del(&cur_op->list);
gossip_debug(GOSSIP_INIT_DEBUG,
"Freeing unhandled upcall request type %d\n",
cur_op->upcall.type);
op_release(cur_op);
}
spin_unlock(&pvfs2_request_list_lock);
for (i = 0; i < hash_table_size; i++)
while (!list_empty(&htable_ops_in_progress[i])) {
cur_op = list_entry(htable_ops_in_progress[i].next,
struct pvfs2_kernel_op_s,
list);
op_release(cur_op);
}
kiocb_cache_finalize();
pvfs2_inode_cache_finalize();
dev_req_cache_finalize();
op_cache_finalize();
kfree(htable_ops_in_progress);
bdi_destroy(&pvfs2_backing_dev_info);
pr_info("pvfs2: module version %s unloaded\n", PVFS2_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 pvfs2_kernel_op_s *op;
struct pvfs2_kernel_op_s *next;
list_for_each_entry_safe(op,
next,
&htable_ops_in_progress[i],
list) {
spin_lock(&op->lock);
gossip_debug(GOSSIP_INIT_DEBUG,
"pvfs2-client-core: purging in-progress op tag "
"%llu %s\n",
llu(op->tag),
get_opname_string(op));
set_op_state_purged(op);
spin_unlock(&op->lock);
wake_up_interruptible(&op->waitq);
}
}
}
module_init(pvfs2_init);
module_exit(pvfs2_exit);
