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-rw-r--r--fs/orangefs/orangefs-mod.c234
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);