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231 lines
5.9 KiB
231 lines
5.9 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* (C) 2001 Clemson University and The University of Chicago |
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* |
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* Changes by Acxiom Corporation to add proc file handler for pvfs2 client |
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* parameters, Copyright Acxiom Corporation, 2005. |
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* |
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* See COPYING in top-level directory. |
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*/ |
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#include "protocol.h" |
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#include "orangefs-kernel.h" |
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#include "orangefs-debugfs.h" |
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#include "orangefs-sysfs.h" |
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/* ORANGEFS_VERSION is a ./configure define */ |
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#ifndef ORANGEFS_VERSION |
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#define ORANGEFS_VERSION "upstream" |
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#endif |
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/* |
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* global variables declared here |
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*/ |
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struct orangefs_stats orangefs_stats; |
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/* the size of the hash tables for ops in progress */ |
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int hash_table_size = 509; |
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static ulong module_parm_debug_mask; |
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__u64 orangefs_gossip_debug_mask; |
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int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS; |
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int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS; |
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int orangefs_cache_timeout_msecs = 50; |
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int orangefs_dcache_timeout_msecs = 50; |
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int orangefs_getattr_timeout_msecs = 50; |
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MODULE_LICENSE("GPL"); |
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MODULE_AUTHOR("ORANGEFS Development Team"); |
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MODULE_DESCRIPTION("The Linux Kernel VFS interface to ORANGEFS"); |
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MODULE_PARM_DESC(module_parm_debug_mask, "debugging level (see orangefs-debug.h for values)"); |
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MODULE_PARM_DESC(op_timeout_secs, "Operation timeout in seconds"); |
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MODULE_PARM_DESC(slot_timeout_secs, "Slot timeout in seconds"); |
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MODULE_PARM_DESC(hash_table_size, |
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"size of hash table for operations in progress"); |
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static struct file_system_type orangefs_fs_type = { |
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.name = "pvfs2", |
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.mount = orangefs_mount, |
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.kill_sb = orangefs_kill_sb, |
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.owner = THIS_MODULE, |
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}; |
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module_param(hash_table_size, int, 0); |
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module_param(module_parm_debug_mask, ulong, 0644); |
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module_param(op_timeout_secs, int, 0); |
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module_param(slot_timeout_secs, int, 0); |
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/* |
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* Blocks non-priority requests from being queued for servicing. This |
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* could be used for protecting the request list data structure, but |
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* for now it's only being used to stall the op addition to the request |
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* list |
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*/ |
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DEFINE_MUTEX(orangefs_request_mutex); |
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/* hash table for storing operations waiting for matching downcall */ |
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struct list_head *orangefs_htable_ops_in_progress; |
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DEFINE_SPINLOCK(orangefs_htable_ops_in_progress_lock); |
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/* list for queueing upcall operations */ |
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LIST_HEAD(orangefs_request_list); |
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/* used to protect the above orangefs_request_list */ |
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DEFINE_SPINLOCK(orangefs_request_list_lock); |
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/* used for incoming request notification */ |
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DECLARE_WAIT_QUEUE_HEAD(orangefs_request_list_waitq); |
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static int __init orangefs_init(void) |
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{ |
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int ret; |
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__u32 i = 0; |
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if (op_timeout_secs < 0) |
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op_timeout_secs = 0; |
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if (slot_timeout_secs < 0) |
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slot_timeout_secs = 0; |
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/* initialize global book keeping data structures */ |
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ret = op_cache_initialize(); |
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if (ret < 0) |
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goto out; |
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ret = orangefs_inode_cache_initialize(); |
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if (ret < 0) |
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goto cleanup_op; |
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orangefs_htable_ops_in_progress = |
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kcalloc(hash_table_size, sizeof(struct list_head), GFP_KERNEL); |
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if (!orangefs_htable_ops_in_progress) { |
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ret = -ENOMEM; |
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goto cleanup_inode; |
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} |
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/* initialize a doubly linked at each hash table index */ |
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for (i = 0; i < hash_table_size; i++) |
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INIT_LIST_HEAD(&orangefs_htable_ops_in_progress[i]); |
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ret = fsid_key_table_initialize(); |
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if (ret < 0) |
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goto cleanup_progress_table; |
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/* |
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* Build the contents of /sys/kernel/debug/orangefs/debug-help |
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* from the keywords in the kernel keyword/mask array. |
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* |
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* The keywords in the client keyword/mask array are |
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* unknown at boot time. |
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* |
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* orangefs_prepare_debugfs_help_string will be used again |
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* later to rebuild the debug-help-string after the client starts |
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* and passes along the needed info. The argument signifies |
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* which time orangefs_prepare_debugfs_help_string is being |
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* called. |
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*/ |
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ret = orangefs_prepare_debugfs_help_string(1); |
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if (ret) |
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goto cleanup_key_table; |
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orangefs_debugfs_init(module_parm_debug_mask); |
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ret = orangefs_sysfs_init(); |
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if (ret) |
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goto sysfs_init_failed; |
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/* Initialize the orangefsdev subsystem. */ |
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ret = orangefs_dev_init(); |
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if (ret < 0) { |
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gossip_err("%s: could not initialize device subsystem %d!\n", |
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__func__, |
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ret); |
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goto cleanup_device; |
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} |
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ret = register_filesystem(&orangefs_fs_type); |
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if (ret == 0) { |
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pr_info("%s: module version %s loaded\n", |
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__func__, |
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ORANGEFS_VERSION); |
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goto out; |
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} |
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orangefs_sysfs_exit(); |
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cleanup_device: |
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orangefs_dev_cleanup(); |
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sysfs_init_failed: |
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orangefs_debugfs_cleanup(); |
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cleanup_key_table: |
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fsid_key_table_finalize(); |
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cleanup_progress_table: |
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kfree(orangefs_htable_ops_in_progress); |
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cleanup_inode: |
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orangefs_inode_cache_finalize(); |
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cleanup_op: |
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op_cache_finalize(); |
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out: |
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return ret; |
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} |
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static void __exit orangefs_exit(void) |
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{ |
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int i = 0; |
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gossip_debug(GOSSIP_INIT_DEBUG, "orangefs: orangefs_exit called\n"); |
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unregister_filesystem(&orangefs_fs_type); |
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orangefs_debugfs_cleanup(); |
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orangefs_sysfs_exit(); |
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fsid_key_table_finalize(); |
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orangefs_dev_cleanup(); |
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BUG_ON(!list_empty(&orangefs_request_list)); |
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for (i = 0; i < hash_table_size; i++) |
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BUG_ON(!list_empty(&orangefs_htable_ops_in_progress[i])); |
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orangefs_inode_cache_finalize(); |
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op_cache_finalize(); |
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kfree(orangefs_htable_ops_in_progress); |
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pr_info("orangefs: module version %s unloaded\n", ORANGEFS_VERSION); |
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} |
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/* |
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* What we do in this function is to walk the list of operations |
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* that are in progress in the hash table and mark them as purged as well. |
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*/ |
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void purge_inprogress_ops(void) |
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{ |
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int i; |
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for (i = 0; i < hash_table_size; i++) { |
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struct orangefs_kernel_op_s *op; |
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struct orangefs_kernel_op_s *next; |
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spin_lock(&orangefs_htable_ops_in_progress_lock); |
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list_for_each_entry_safe(op, |
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next, |
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&orangefs_htable_ops_in_progress[i], |
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list) { |
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set_op_state_purged(op); |
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gossip_debug(GOSSIP_DEV_DEBUG, |
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"%s: op:%s: op_state:%d: process:%s:\n", |
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__func__, |
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get_opname_string(op), |
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op->op_state, |
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current->comm); |
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} |
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spin_unlock(&orangefs_htable_ops_in_progress_lock); |
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} |
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} |
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module_init(orangefs_init); |
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module_exit(orangefs_exit);
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