Orangefs: change pvfs2 filenames to orangefs

Also changed references within source files that referred to
header files whose names had changed.

Signed-off-by: Mike Marshall <hubcap@omnibond.com>

1 files changed, 819 insertions, 0 deletions

diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h
new file mode 100644
index 000000000000..840872389fc5
--- /dev/null
+++ b/fs/orangefs/orangefs-kernel.h
@@ -0,0 +1,819 @@
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ *  The ORANGEFS Linux kernel support allows ORANGEFS volumes to be mounted and
+ *  accessed through the Linux VFS (i.e. using standard I/O system calls).
+ *  This support is only needed on clients that wish to mount the file system.
+ *
+ */
+
+/*
+ *  Declarations and macros for the ORANGEFS Linux kernel support.
+ */
+
+#ifndef __ORANGEFSKERNEL_H
+#define __ORANGEFSKERNEL_H
+
+#include <linux/kernel.h>
+#include <linux/moduleparam.h>
+#include <linux/statfs.h>
+#include <linux/backing-dev.h>
+#include <linux/device.h>
+#include <linux/mpage.h>
+#include <linux/namei.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/vmalloc.h>
+
+#include <linux/aio.h>
+#include <linux/posix_acl.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/compat.h>
+#include <linux/mount.h>
+#include <linux/uaccess.h>
+#include <linux/atomic.h>
+#include <linux/uio.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/wait.h>
+#include <linux/dcache.h>
+#include <linux/pagemap.h>
+#include <linux/poll.h>
+#include <linux/rwsem.h>
+#include <linux/xattr.h>
+#include <linux/exportfs.h>
+
+#include <asm/unaligned.h>
+
+#include "orangefs-dev-proto.h"
+
+#ifdef ORANGEFS_KERNEL_DEBUG
+#define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS       10
+#else
+#define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS       20
+#endif
+
+#define ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS   30
+
+#define ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS     900	/* 15 minutes */
+
+#define ORANGEFS_REQDEVICE_NAME          "pvfs2-req"
+
+#define ORANGEFS_DEVREQ_MAGIC             0x20030529
+#define ORANGEFS_LINK_MAX                 0x000000FF
+#define ORANGEFS_PURGE_RETRY_COUNT     0x00000005
+#define ORANGEFS_SEEK_END              0x00000002
+#define ORANGEFS_MAX_NUM_OPTIONS          0x00000004
+#define ORANGEFS_MAX_MOUNT_OPT_LEN        0x00000080
+#define ORANGEFS_MAX_FSKEY_LEN            64
+
+#define MAX_DEV_REQ_UPSIZE (2*sizeof(__s32) +   \
+sizeof(__u64) + sizeof(struct orangefs_upcall_s))
+#define MAX_DEV_REQ_DOWNSIZE (2*sizeof(__s32) + \
+sizeof(__u64) + sizeof(struct orangefs_downcall_s))
+
+#define BITS_PER_LONG_DIV_8 (BITS_PER_LONG >> 3)
+
+/* borrowed from irda.h */
+#ifndef MSECS_TO_JIFFIES
+#define MSECS_TO_JIFFIES(ms) (((ms)*HZ+999)/1000)
+#endif
+
+#define MAX_ALIGNED_DEV_REQ_UPSIZE				\
+		(MAX_DEV_REQ_UPSIZE +				\
+			((((MAX_DEV_REQ_UPSIZE /		\
+				(BITS_PER_LONG_DIV_8)) *	\
+				(BITS_PER_LONG_DIV_8)) +	\
+			    (BITS_PER_LONG_DIV_8)) -		\
+			MAX_DEV_REQ_UPSIZE))
+
+#define MAX_ALIGNED_DEV_REQ_DOWNSIZE				\
+		(MAX_DEV_REQ_DOWNSIZE +				\
+			((((MAX_DEV_REQ_DOWNSIZE /		\
+				(BITS_PER_LONG_DIV_8)) *	\
+				(BITS_PER_LONG_DIV_8)) +	\
+			    (BITS_PER_LONG_DIV_8)) -		\
+			MAX_DEV_REQ_DOWNSIZE))
+
+/*
+ * valid orangefs kernel operation states
+ *
+ * unknown  - op was just initialized
+ * waiting  - op is on request_list (upward bound)
+ * inprogr  - op is in progress (waiting for downcall)
+ * serviced - op has matching downcall; ok
+ * purged   - op has to start a timer since client-core
+ *            exited uncleanly before servicing op
+ */
+enum orangefs_vfs_op_states {
+	OP_VFS_STATE_UNKNOWN = 0,
+	OP_VFS_STATE_WAITING = 1,
+	OP_VFS_STATE_INPROGR = 2,
+	OP_VFS_STATE_SERVICED = 4,
+	OP_VFS_STATE_PURGED = 8,
+};
+
+#define set_op_state_waiting(op)     ((op)->op_state = OP_VFS_STATE_WAITING)
+#define set_op_state_inprogress(op)  ((op)->op_state = OP_VFS_STATE_INPROGR)
+#define set_op_state_serviced(op)    ((op)->op_state = OP_VFS_STATE_SERVICED)
+#define set_op_state_purged(op)      ((op)->op_state |= OP_VFS_STATE_PURGED)
+
+#define op_state_waiting(op)     ((op)->op_state & OP_VFS_STATE_WAITING)
+#define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
+#define op_state_serviced(op)    ((op)->op_state & OP_VFS_STATE_SERVICED)
+#define op_state_purged(op)      ((op)->op_state & OP_VFS_STATE_PURGED)
+
+#define get_op(op)					\
+	do {						\
+		atomic_inc(&(op)->aio_ref_count);	\
+		gossip_debug(GOSSIP_DEV_DEBUG,	\
+			"(get) Alloced OP (%p:%llu)\n",	\
+			op,				\
+			llu((op)->tag));		\
+	} while (0)
+
+#define put_op(op)							\
+	do {								\
+		if (atomic_sub_and_test(1, &(op)->aio_ref_count) == 1) {  \
+			gossip_debug(GOSSIP_DEV_DEBUG,		\
+				"(put) Releasing OP (%p:%llu)\n",	\
+				op,					\
+				llu((op)->tag));			\
+			op_release(op);					\
+			}						\
+	} while (0)
+
+#define op_wait(op) (atomic_read(&(op)->aio_ref_count) <= 2 ? 0 : 1)
+
+/*
+ * Defines for controlling whether I/O upcalls are for async or sync operations
+ */
+enum ORANGEFS_async_io_type {
+	ORANGEFS_VFS_SYNC_IO = 0,
+	ORANGEFS_VFS_ASYNC_IO = 1,
+};
+
+/*
+ * An array of client_debug_mask will be built to hold debug keyword/mask
+ * values fetched from userspace.
+ */
+struct client_debug_mask {
+	char *keyword;
+	__u64 mask1;
+	__u64 mask2;
+};
+
+/*
+ * orangefs kernel memory related flags
+ */
+
+#if ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB))
+#define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE
+#else
+#define ORANGEFS_CACHE_CREATE_FLAGS 0
+#endif /* ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB)) */
+
+#define ORANGEFS_CACHE_ALLOC_FLAGS (GFP_KERNEL)
+#define ORANGEFS_GFP_FLAGS (GFP_KERNEL)
+#define ORANGEFS_BUFMAP_GFP_FLAGS (GFP_KERNEL)
+
+/* orangefs xattr and acl related defines */
+#define ORANGEFS_XATTR_INDEX_POSIX_ACL_ACCESS  1
+#define ORANGEFS_XATTR_INDEX_POSIX_ACL_DEFAULT 2
+#define ORANGEFS_XATTR_INDEX_TRUSTED           3
+#define ORANGEFS_XATTR_INDEX_DEFAULT           4
+
+#if 0
+#ifndef POSIX_ACL_XATTR_ACCESS
+#define POSIX_ACL_XATTR_ACCESS	"system.posix_acl_access"
+#endif
+#ifndef POSIX_ACL_XATTR_DEFAULT
+#define POSIX_ACL_XATTR_DEFAULT	"system.posix_acl_default"
+#endif
+#endif
+
+#define ORANGEFS_XATTR_NAME_ACL_ACCESS  POSIX_ACL_XATTR_ACCESS
+#define ORANGEFS_XATTR_NAME_ACL_DEFAULT POSIX_ACL_XATTR_DEFAULT
+#define ORANGEFS_XATTR_NAME_TRUSTED_PREFIX "trusted."
+#define ORANGEFS_XATTR_NAME_DEFAULT_PREFIX ""
+
+/* these functions are defined in orangefs-utils.c */
+int orangefs_prepare_cdm_array(char *debug_array_string);
+int orangefs_prepare_debugfs_help_string(int);
+
+/* defined in orangefs-debugfs.c */
+int orangefs_client_debug_init(void);
+
+void debug_string_to_mask(char *, void *, int);
+void do_c_mask(int, char *, struct client_debug_mask **);
+void do_k_mask(int, char *, __u64 **);
+
+void debug_mask_to_string(void *, int);
+void do_k_string(void *, int);
+void do_c_string(void *, int);
+int check_amalgam_keyword(void *, int);
+int keyword_is_amalgam(char *);
+
+/*these variables are defined in orangefs-mod.c */
+extern char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
+extern char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
+extern char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
+extern unsigned int kernel_mask_set_mod_init;
+
+extern int orangefs_init_acl(struct inode *inode, struct inode *dir);
+extern const struct xattr_handler *orangefs_xattr_handlers[];
+
+extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type);
+extern int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
+
+/*
+ * Redefine xtvec structure so that we could move helper functions out of
+ * the define
+ */
+struct xtvec {
+	__kernel_off_t xtv_off;		/* must be off_t */
+	__kernel_size_t xtv_len;	/* must be size_t */
+};
+
+/*
+ * orangefs data structures
+ */
+struct orangefs_kernel_op_s {
+	enum orangefs_vfs_op_states op_state;
+	__u64 tag;
+
+	/*
+	 * Set uses_shared_memory to 1 if this operation uses shared memory.
+	 * If true, then a retry on the op must also get a new shared memory
+	 * buffer and re-populate it.
+	 */
+	int uses_shared_memory;
+
+	struct orangefs_upcall_s upcall;
+	struct orangefs_downcall_s downcall;
+
+	wait_queue_head_t waitq;
+	spinlock_t lock;
+
+	int io_completed;
+	wait_queue_head_t io_completion_waitq;
+
+	/* VFS aio fields */
+
+	/* used by the async I/O code to stash the orangefs_kiocb_s structure */
+	void *priv;
+
+	/* used again for the async I/O code for deallocation */
+	atomic_t aio_ref_count;
+
+	int attempts;
+
+	struct list_head list;
+};
+
+/* per inode private orangefs info */
+struct orangefs_inode_s {
+	struct orangefs_object_kref refn;
+	char link_target[ORANGEFS_NAME_MAX];
+	__s64 blksize;
+	/*
+	 * Reading/Writing Extended attributes need to acquire the appropriate
+	 * reader/writer semaphore on the orangefs_inode_s structure.
+	 */
+	struct rw_semaphore xattr_sem;
+
+	struct inode vfs_inode;
+	sector_t last_failed_block_index_read;
+
+	/*
+	 * State of in-memory attributes not yet flushed to disk associated
+	 * with this object
+	 */
+	unsigned long pinode_flags;
+
+	/* All allocated orangefs_inode_s objects are chained to a list */
+	struct list_head list;
+};
+
+#define P_ATIME_FLAG 0
+#define P_MTIME_FLAG 1
+#define P_CTIME_FLAG 2
+#define P_MODE_FLAG  3
+
+#define ClearAtimeFlag(pinode) clear_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
+#define SetAtimeFlag(pinode)   set_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
+#define AtimeFlag(pinode)      test_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
+
+#define ClearMtimeFlag(pinode) clear_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
+#define SetMtimeFlag(pinode)   set_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
+#define MtimeFlag(pinode)      test_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
+
+#define ClearCtimeFlag(pinode) clear_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
+#define SetCtimeFlag(pinode)   set_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
+#define CtimeFlag(pinode)      test_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
+
+#define ClearModeFlag(pinode) clear_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
+#define SetModeFlag(pinode)   set_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
+#define ModeFlag(pinode)      test_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
+
+/* per superblock private orangefs info */
+struct orangefs_sb_info_s {
+	struct orangefs_khandle root_khandle;
+	__s32 fs_id;
+	int id;
+	int flags;
+#define ORANGEFS_OPT_INTR	0x01
+#define ORANGEFS_OPT_LOCAL_LOCK	0x02
+	char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
+	struct super_block *sb;
+	int mount_pending;
+	struct list_head list;
+};
+
+/*
+ * structure that holds the state of any async I/O operation issued
+ * through the VFS. Needed especially to handle cancellation requests
+ * or even completion notification so that the VFS client-side daemon
+ * can free up its vfs_request slots.
+ */
+struct orangefs_kiocb_s {
+	/* the pointer to the task that initiated the AIO */
+	struct task_struct *tsk;
+
+	/* pointer to the kiocb that kicked this operation */
+	struct kiocb *kiocb;
+
+	/* buffer index that was used for the I/O */
+	struct orangefs_bufmap *bufmap;
+	int buffer_index;
+
+	/* orangefs kernel operation type */
+	struct orangefs_kernel_op_s *op;
+
+	/* The user space buffers from/to which I/O is being staged */
+	struct iovec *iov;
+
+	/* number of elements in the iovector */
+	unsigned long nr_segs;
+
+	/* set to indicate the type of the operation */
+	int rw;
+
+	/* file offset */
+	loff_t offset;
+
+	/* and the count in bytes */
+	size_t bytes_to_be_copied;
+
+	ssize_t bytes_copied;
+	int needs_cleanup;
+};
+
+struct orangefs_stats {
+	unsigned long cache_hits;
+	unsigned long cache_misses;
+	unsigned long reads;
+	unsigned long writes;
+};
+
+extern struct orangefs_stats g_orangefs_stats;
+
+/*
+ * NOTE: See Documentation/filesystems/porting for information
+ * on implementing FOO_I and properly accessing fs private data
+ */
+static inline struct orangefs_inode_s *ORANGEFS_I(struct inode *inode)
+{
+	return container_of(inode, struct orangefs_inode_s, vfs_inode);
+}
+
+static inline struct orangefs_sb_info_s *ORANGEFS_SB(struct super_block *sb)
+{
+	return (struct orangefs_sb_info_s *) sb->s_fs_info;
+}
+
+/* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
+static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
+{
+	union {
+		unsigned char u[8];
+		__u64 ino;
+	} ihandle;
+
+	ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
+	ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
+	ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
+	ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
+	ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
+	ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
+	ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
+	ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
+
+	return ihandle.ino;
+}
+
+static inline struct orangefs_khandle *get_khandle_from_ino(struct inode *inode)
+{
+	return &(ORANGEFS_I(inode)->refn.khandle);
+}
+
+static inline __s32 get_fsid_from_ino(struct inode *inode)
+{
+	return ORANGEFS_I(inode)->refn.fs_id;
+}
+
+static inline ino_t get_ino_from_khandle(struct inode *inode)
+{
+	struct orangefs_khandle *khandle;
+	ino_t ino;
+
+	khandle = get_khandle_from_ino(inode);
+	ino = orangefs_khandle_to_ino(khandle);
+	return ino;
+}
+
+static inline ino_t get_parent_ino_from_dentry(struct dentry *dentry)
+{
+	return get_ino_from_khandle(dentry->d_parent->d_inode);
+}
+
+static inline int is_root_handle(struct inode *inode)
+{
+	gossip_debug(GOSSIP_DCACHE_DEBUG,
+		     "%s: root handle: %pU, this handle: %pU:\n",
+		     __func__,
+		     &ORANGEFS_SB(inode->i_sb)->root_khandle,
+		     get_khandle_from_ino(inode));
+
+	if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
+			     get_khandle_from_ino(inode)))
+		return 0;
+	else
+		return 1;
+}
+
+static inline int match_handle(struct orangefs_khandle resp_handle,
+			       struct inode *inode)
+{
+	gossip_debug(GOSSIP_DCACHE_DEBUG,
+		     "%s: one handle: %pU, another handle:%pU:\n",
+		     __func__,
+		     &resp_handle,
+		     get_khandle_from_ino(inode));
+
+	if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
+		return 0;
+	else
+		return 1;
+}
+
+/*
+ * defined in orangefs-cache.c
+ */
+int op_cache_initialize(void);
+int op_cache_finalize(void);
+struct orangefs_kernel_op_s *op_alloc(__s32 type);
+char *get_opname_string(struct orangefs_kernel_op_s *new_op);
+void op_release(struct orangefs_kernel_op_s *op);
+
+int dev_req_cache_initialize(void);
+int dev_req_cache_finalize(void);
+void *dev_req_alloc(void);
+void dev_req_release(void *);
+
+int orangefs_inode_cache_initialize(void);
+int orangefs_inode_cache_finalize(void);
+
+int kiocb_cache_initialize(void);
+int kiocb_cache_finalize(void);
+struct orangefs_kiocb_s *kiocb_alloc(void);
+void kiocb_release(struct orangefs_kiocb_s *ptr);
+
+/*
+ * defined in orangefs-mod.c
+ */
+void purge_inprogress_ops(void);
+
+/*
+ * defined in waitqueue.c
+ */
+int wait_for_matching_downcall(struct orangefs_kernel_op_s *op);
+int wait_for_cancellation_downcall(struct orangefs_kernel_op_s *op);
+void orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op);
+void purge_waiting_ops(void);
+
+/*
+ * defined in super.c
+ */
+struct dentry *orangefs_mount(struct file_system_type *fst,
+			   int flags,
+			   const char *devname,
+			   void *data);
+
+void orangefs_kill_sb(struct super_block *sb);
+int orangefs_remount(struct super_block *sb);
+
+int fsid_key_table_initialize(void);
+void fsid_key_table_finalize(void);
+
+/*
+ * defined in inode.c
+ */
+__u32 convert_to_orangefs_mask(unsigned long lite_mask);
+struct inode *orangefs_new_inode(struct super_block *sb,
+			      struct inode *dir,
+			      int mode,
+			      dev_t dev,
+			      struct orangefs_object_kref *ref);
+
+int orangefs_setattr(struct dentry *dentry, struct iattr *iattr);
+
+int orangefs_getattr(struct vfsmount *mnt,
+		  struct dentry *dentry,
+		  struct kstat *kstat);
+
+/*
+ * defined in xattr.c
+ */
+int orangefs_setxattr(struct dentry *dentry,
+		   const char *name,
+		   const void *value,
+		   size_t size,
+		   int flags);
+
+ssize_t orangefs_getxattr(struct dentry *dentry,
+		       const char *name,
+		       void *buffer,
+		       size_t size);
+
+ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
+
+/*
+ * defined in namei.c
+ */
+struct inode *orangefs_iget(struct super_block *sb,
+			 struct orangefs_object_kref *ref);
+
+ssize_t orangefs_inode_read(struct inode *inode,
+			    struct iov_iter *iter,
+			    loff_t *offset,
+			    loff_t readahead_size);
+
+/*
+ * defined in devorangefs-req.c
+ */
+int orangefs_dev_init(void);
+void orangefs_dev_cleanup(void);
+int is_daemon_in_service(void);
+int fs_mount_pending(__s32 fsid);
+
+/*
+ * defined in orangefs-utils.c
+ */
+__s32 fsid_of_op(struct orangefs_kernel_op_s *op);
+
+int orangefs_flush_inode(struct inode *inode);
+
+ssize_t orangefs_inode_getxattr(struct inode *inode,
+			     const char *prefix,
+			     const char *name,
+			     void *buffer,
+			     size_t size);
+
+int orangefs_inode_setxattr(struct inode *inode,
+			 const char *prefix,
+			 const char *name,
+			 const void *value,
+			 size_t size,
+			 int flags);
+
+int orangefs_inode_getattr(struct inode *inode, __u32 mask);
+
+int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr);
+
+void orangefs_op_initialize(struct orangefs_kernel_op_s *op);
+
+void orangefs_make_bad_inode(struct inode *inode);
+
+void block_signals(sigset_t *);
+
+void set_signals(sigset_t *);
+
+int orangefs_unmount_sb(struct super_block *sb);
+
+int orangefs_cancel_op_in_progress(__u64 tag);
+
+static inline __u64 orangefs_convert_time_field(const struct timespec *ts)
+{
+	return (__u64)ts->tv_sec;
+}
+
+int orangefs_normalize_to_errno(__s32 error_code);
+
+extern struct mutex devreq_mutex;
+extern struct mutex request_mutex;
+extern int debug;
+extern int op_timeout_secs;
+extern int slot_timeout_secs;
+extern struct list_head orangefs_superblocks;
+extern spinlock_t orangefs_superblocks_lock;
+extern struct list_head orangefs_request_list;
+extern spinlock_t orangefs_request_list_lock;
+extern wait_queue_head_t orangefs_request_list_waitq;
+extern struct list_head *htable_ops_in_progress;
+extern spinlock_t htable_ops_in_progress_lock;
+extern int hash_table_size;
+
+extern const struct address_space_operations orangefs_address_operations;
+extern struct backing_dev_info orangefs_backing_dev_info;
+extern struct inode_operations orangefs_file_inode_operations;
+extern const struct file_operations orangefs_file_operations;
+extern struct inode_operations orangefs_symlink_inode_operations;
+extern struct inode_operations orangefs_dir_inode_operations;
+extern const struct file_operations orangefs_dir_operations;
+extern const struct dentry_operations orangefs_dentry_operations;
+extern const struct file_operations orangefs_devreq_file_operations;
+
+extern wait_queue_head_t orangefs_bufmap_init_waitq;
+
+/*
+ * misc convenience macros
+ */
+#define add_op_to_request_list(op)				\
+do {								\
+	spin_lock(&orangefs_request_list_lock);			\
+	spin_lock(&op->lock);					\
+	set_op_state_waiting(op);				\
+	list_add_tail(&op->list, &orangefs_request_list);		\
+	spin_unlock(&orangefs_request_list_lock);			\
+	spin_unlock(&op->lock);					\
+	wake_up_interruptible(&orangefs_request_list_waitq);	\
+} while (0)
+
+#define add_priority_op_to_request_list(op)				\
+	do {								\
+		spin_lock(&orangefs_request_list_lock);			\
+		spin_lock(&op->lock);					\
+		set_op_state_waiting(op);				\
+									\
+		list_add(&op->list, &orangefs_request_list);		\
+		spin_unlock(&orangefs_request_list_lock);			\
+		spin_unlock(&op->lock);					\
+		wake_up_interruptible(&orangefs_request_list_waitq);	\
+} while (0)
+
+#define remove_op_from_request_list(op)					\
+	do {								\
+		struct list_head *tmp = NULL;				\
+		struct list_head *tmp_safe = NULL;			\
+		struct orangefs_kernel_op_s *tmp_op = NULL;		\
+									\
+		spin_lock(&orangefs_request_list_lock);			\
+		list_for_each_safe(tmp, tmp_safe, &orangefs_request_list) { \
+			tmp_op = list_entry(tmp,			\
+					    struct orangefs_kernel_op_s,	\
+					    list);			\
+			if (tmp_op && (tmp_op == op)) {			\
+				list_del(&tmp_op->list);		\
+				break;					\
+			}						\
+		}							\
+		spin_unlock(&orangefs_request_list_lock);			\
+	} while (0)
+
+#define ORANGEFS_OP_INTERRUPTIBLE 1   /* service_operation() is interruptible */
+#define ORANGEFS_OP_PRIORITY      2   /* service_operation() is high priority */
+#define ORANGEFS_OP_CANCELLATION  4   /* this is a cancellation */
+#define ORANGEFS_OP_NO_SEMAPHORE  8   /* don't acquire semaphore */
+#define ORANGEFS_OP_ASYNC         16  /* Queue it, but don't wait */
+
+int service_operation(struct orangefs_kernel_op_s *op,
+		      const char *op_name,
+		      int flags);
+
+/*
+ * handles two possible error cases, depending on context.
+ *
+ * by design, our vfs i/o errors need to be handled in one of two ways,
+ * depending on where the error occured.
+ *
+ * if the error happens in the waitqueue code because we either timed
+ * out or a signal was raised while waiting, we need to cancel the
+ * userspace i/o operation and free the op manually.  this is done to
+ * avoid having the device start writing application data to our shared
+ * bufmap pages without us expecting it.
+ *
+ * FIXME: POSSIBLE OPTIMIZATION:
+ * However, if we timed out or if we got a signal AND our upcall was never
+ * picked off the queue (i.e. we were in OP_VFS_STATE_WAITING), then we don't
+ * need to send a cancellation upcall. The way we can handle this is
+ * set error_exit to 2 in such cases and 1 whenever cancellation has to be
+ * sent and have handle_error
+ * take care of this situation as well..
+ *
+ * if a orangefs sysint level error occured and i/o has been completed,
+ * there is no need to cancel the operation, as the user has finished
+ * using the bufmap page and so there is no danger in this case.  in
+ * this case, we wake up the device normally so that it may free the
+ * op, as normal.
+ *
+ * note the only reason this is a macro is because both read and write
+ * cases need the exact same handling code.
+ */
+#define handle_io_error()					\
+do {								\
+	if (!op_state_serviced(new_op)) {			\
+		orangefs_cancel_op_in_progress(new_op->tag);	\
+		op_release(new_op);				\
+	} else {						\
+		wake_up_daemon_for_return(new_op);		\
+	}							\
+	new_op = NULL;						\
+	orangefs_bufmap_put(bufmap, buffer_index);				\
+	buffer_index = -1;					\
+} while (0)
+
+#define get_interruptible_flag(inode) \
+	((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
+		ORANGEFS_OP_INTERRUPTIBLE : 0)
+
+#define add_orangefs_sb(sb)						\
+do {									\
+	gossip_debug(GOSSIP_SUPER_DEBUG,				\
+		     "Adding SB %p to orangefs superblocks\n",		\
+		     ORANGEFS_SB(sb));					\
+	spin_lock(&orangefs_superblocks_lock);				\
+	list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);		\
+	spin_unlock(&orangefs_superblocks_lock); \
+} while (0)
+
+#define remove_orangefs_sb(sb)						\
+do {									\
+	struct list_head *tmp = NULL;					\
+	struct list_head *tmp_safe = NULL;				\
+	struct orangefs_sb_info_s *orangefs_sb = NULL;			\
+									\
+	spin_lock(&orangefs_superblocks_lock);				\
+	list_for_each_safe(tmp, tmp_safe, &orangefs_superblocks) {		\
+		orangefs_sb = list_entry(tmp,				\
+				      struct orangefs_sb_info_s,		\
+				      list);				\
+		if (orangefs_sb && (orangefs_sb->sb == sb)) {			\
+			gossip_debug(GOSSIP_SUPER_DEBUG,		\
+			    "Removing SB %p from orangefs superblocks\n",	\
+			orangefs_sb);					\
+			list_del(&orangefs_sb->list);			\
+			break;						\
+		}							\
+	}								\
+	spin_unlock(&orangefs_superblocks_lock);				\
+} while (0)
+
+#define orangefs_lock_inode(inode) spin_lock(&inode->i_lock)
+#define orangefs_unlock_inode(inode) spin_unlock(&inode->i_lock)
+
+#define fill_default_sys_attrs(sys_attr, type, mode)			\
+do {									\
+	sys_attr.owner = from_kuid(current_user_ns(), current_fsuid()); \
+	sys_attr.group = from_kgid(current_user_ns(), current_fsgid()); \
+	sys_attr.size = 0;						\
+	sys_attr.perms = ORANGEFS_util_translate_mode(mode);		\
+	sys_attr.objtype = type;					\
+	sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE;			\
+} while (0)
+
+#define orangefs_inode_lock(__i)  mutex_lock(&(__i)->i_mutex)
+
+#define orangefs_inode_unlock(__i) mutex_unlock(&(__i)->i_mutex)
+
+static inline void orangefs_i_size_write(struct inode *inode, loff_t i_size)
+{
+#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
+	ornagefs_inode_lock(inode);
+#endif
+	i_size_write(inode, i_size);
+#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
+	orangefs_inode_unlock(inode);
+#endif
+}
+
+static inline unsigned int diff(struct timeval *end, struct timeval *begin)
+{
+	if (end->tv_usec < begin->tv_usec) {
+		end->tv_usec += 1000000;
+		end->tv_sec--;
+	}
+	end->tv_sec -= begin->tv_sec;
+	end->tv_usec -= begin->tv_usec;
+	return (end->tv_sec * 1000000) + end->tv_usec;
+}
+
+#endif /* __ORANGEFSKERNEL_H */