[linux-2.6-block.git] / fs / orangefs / orangefs-kernel.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * (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/signal.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"

#define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS       20

#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_PURGE_RETRY_COUNT     0x00000005

#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))

/*
 * 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
 * given up - submitter has given up waiting for it
 */
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,
	OP_VFS_STATE_GIVEN_UP = 16,
};

/*
 * orangefs kernel memory related flags
 */

#if (defined CONFIG_DEBUG_SLAB)
#define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE
#else
#define ORANGEFS_CACHE_CREATE_FLAGS 0
#endif

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);

/*
 * orangefs data structures
 */
struct orangefs_kernel_op_s {
	enum orangefs_vfs_op_states op_state;
	__u64 tag;

	/*
	 * Set uses_shared_memory to non zero 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.
	 * Cancels don't care - it only matters for service_operation()
	 * retry logics and cancels don't go through it anymore. It
	 * safely stays non-zero when we use it as slot_to_free.
	 */
	union {
		int uses_shared_memory;
		int slot_to_free;
	};

	struct orangefs_upcall_s upcall;
	struct orangefs_downcall_s downcall;

	struct completion waitq;
	spinlock_t lock;

	int attempts;

	struct list_head list;
};

#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_given_up(op)  ((op)->op_state = OP_VFS_STATE_GIVEN_UP)
static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
{
	op->op_state = OP_VFS_STATE_SERVICED;
	complete(&op->waitq);
}

#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 op_state_given_up(op)    ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
#define op_is_cancel(op)         ((op)->upcall.type == ORANGEFS_VFS_OP_CANCEL)

void op_release(struct orangefs_kernel_op_s *op);

extern void orangefs_bufmap_put(int);
static inline void put_cancel(struct orangefs_kernel_op_s *op)
{
	orangefs_bufmap_put(op->slot_to_free);
	op_release(op);
}

static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
{
	spin_lock(&op->lock);
	if (unlikely(op_is_cancel(op))) {
		list_del_init(&op->list);
		spin_unlock(&op->lock);
		put_cancel(op);
	} else {
		op->op_state |= OP_VFS_STATE_PURGED;
		complete(&op->waitq);
		spin_unlock(&op->lock);
	}
}

/* per inode private orangefs info */
struct orangefs_inode_s {
	struct orangefs_object_kref refn;
	char link_target[ORANGEFS_NAME_MAX];
	/*
	 * 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;

	unsigned long getattr_time;
	u32 getattr_mask;
};

/* 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;
	int no_list;
	struct list_head list;
};

struct orangefs_stats {
	unsigned long cache_hits;
	unsigned long cache_misses;
	unsigned long reads;
	unsigned long writes;
};

extern struct orangefs_stats 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 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);
void orangefs_new_tag(struct orangefs_kernel_op_s *op);
char *get_opname_string(struct orangefs_kernel_op_s *new_op);

int orangefs_inode_cache_initialize(void);
int orangefs_inode_cache_finalize(void);

/*
 * defined in orangefs-mod.c
 */
void purge_inprogress_ops(void);

/*
 * defined in waitqueue.c
 */
void purge_waiting_ops(void);

/*
 * defined in super.c
 */
extern uint64_t orangefs_features;

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 orangefs_sb_info_s *);

int fsid_key_table_initialize(void);
void fsid_key_table_finalize(void);

/*
 * defined in inode.c
 */
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(const struct path *path, struct kstat *stat,
		     u32 request_mask, unsigned int flags);

int orangefs_permission(struct inode *inode, int mask);

int orangefs_update_time(struct inode *, struct timespec64 *, int);

/*
 * defined in xattr.c
 */
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
 */
extern uint32_t orangefs_userspace_version;

int orangefs_dev_init(void);
void orangefs_dev_cleanup(void);
int is_daemon_in_service(void);
bool __is_daemon_in_service(void);

/*
 * defined in orangefs-utils.c
 */
__s32 fsid_of_op(struct orangefs_kernel_op_s *op);

ssize_t orangefs_inode_getxattr(struct inode *inode,
			     const char *name,
			     void *buffer,
			     size_t size);

int orangefs_inode_setxattr(struct inode *inode,
			 const char *name,
			 const void *value,
			 size_t size,
			 int flags);

int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
    u32 request_mask);

int orangefs_inode_check_changed(struct inode *inode);

int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr);

bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op);

int orangefs_normalize_to_errno(__s32 error_code);

extern struct mutex orangefs_request_mutex;
extern int op_timeout_secs;
extern int slot_timeout_secs;
extern int orangefs_dcache_timeout_msecs;
extern int orangefs_getattr_timeout_msecs;
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 *orangefs_htable_ops_in_progress;
extern spinlock_t orangefs_htable_ops_in_progress_lock;
extern int hash_table_size;

extern const struct file_operations orangefs_file_operations;
extern const struct inode_operations orangefs_symlink_inode_operations;
extern const struct inode_operations orangefs_dir_inode_operations;
extern const struct file_operations orangefs_dir_operations;
extern const struct dentry_operations orangefs_dentry_operations;

/*
 * misc convenience macros
 */

#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_MUTEX      8   /* don't acquire request_mutex */
#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);

#define get_interruptible_flag(inode) \
	((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
		ORANGEFS_OP_INTERRUPTIBLE : 0)

#define fill_default_sys_attrs(sys_attr, type, mode)			\
do {									\
	sys_attr.owner = from_kuid(&init_user_ns, current_fsuid()); \
	sys_attr.group = from_kgid(&init_user_ns, current_fsgid()); \
	sys_attr.perms = ORANGEFS_util_translate_mode(mode);		\
	sys_attr.mtime = 0;						\
	sys_attr.atime = 0;						\
	sys_attr.ctime = 0;						\
	sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE;			\
} while (0)

static inline void orangefs_set_timeout(struct dentry *dentry)
{
	unsigned long time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;

	dentry->d_fsdata = (void *) time;
}

#endif /* __ORANGEFSKERNEL_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
f7ab093f MM	2	/*
	3	* (C) 2001 Clemson University and The University of Chicago
	4	*
	5	* See COPYING in top-level directory.
	6	*/
	7
	8	/*
8bb8aefd	9	* The ORANGEFS Linux kernel support allows ORANGEFS volumes to be mounted and
f7ab093f MM	10	* accessed through the Linux VFS (i.e. using standard I/O system calls).
	11	* This support is only needed on clients that wish to mount the file system.
	12	*
	13	*/
	14
	15	/*
8bb8aefd	16	* Declarations and macros for the ORANGEFS Linux kernel support.
f7ab093f MM	17	*/
f7ab093f MM	18
8bb8aefd YL	19	#ifndef __ORANGEFSKERNEL_H
8bb8aefd YL	20	#define __ORANGEFSKERNEL_H
f7ab093f MM	21
	22	#include <linux/kernel.h>
	23	#include <linux/moduleparam.h>
	24	#include <linux/statfs.h>
	25	#include <linux/backing-dev.h>
	26	#include <linux/device.h>
	27	#include <linux/mpage.h>
	28	#include <linux/namei.h>
	29	#include <linux/errno.h>
	30	#include <linux/init.h>
	31	#include <linux/module.h>
	32	#include <linux/slab.h>
	33	#include <linux/types.h>
	34	#include <linux/fs.h>
	35	#include <linux/vmalloc.h>
	36
	37	#include <linux/aio.h>
	38	#include <linux/posix_acl.h>
	39	#include <linux/posix_acl_xattr.h>
	40	#include <linux/compat.h>
	41	#include <linux/mount.h>
	42	#include <linux/uaccess.h>
	43	#include <linux/atomic.h>
	44	#include <linux/uio.h>
174cd4b1	45	#include <linux/sched/signal.h>
f7ab093f MM	46	#include <linux/mm.h>
	47	#include <linux/wait.h>
	48	#include <linux/dcache.h>
	49	#include <linux/pagemap.h>
	50	#include <linux/poll.h>
	51	#include <linux/rwsem.h>
	52	#include <linux/xattr.h>
	53	#include <linux/exportfs.h>
	54
	55	#include <asm/unaligned.h>
	56
575e9461	57	#include "orangefs-dev-proto.h"
f7ab093f	58
8bb8aefd	59	#define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS 20
f7ab093f	60
8bb8aefd	61	#define ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS 30
f7ab093f	62
8bb8aefd	63	#define ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS 900 /* 15 minutes */
f7ab093f	64
8bb8aefd	65	#define ORANGEFS_REQDEVICE_NAME "pvfs2-req"
f7ab093f	66
8bb8aefd	67	#define ORANGEFS_DEVREQ_MAGIC 0x20030529
8bb8aefd	68	#define ORANGEFS_PURGE_RETRY_COUNT 0x00000005
f7ab093f	69
cf0c2771	70	#define MAX_DEV_REQ_UPSIZE (2 * sizeof(__s32) + \
8bb8aefd	71	sizeof(__u64) + sizeof(struct orangefs_upcall_s))
cf0c2771	72	#define MAX_DEV_REQ_DOWNSIZE (2 * sizeof(__s32) + \
8bb8aefd	73	sizeof(__u64) + sizeof(struct orangefs_downcall_s))
f7ab093f	74
f7ab093f	75	/*
8bb8aefd	76	* valid orangefs kernel operation states
f7ab093f MM	77	*
	78	* unknown - op was just initialized
	79	* waiting - op is on request_list (upward bound)
	80	* inprogr - op is in progress (waiting for downcall)
	81	* serviced - op has matching downcall; ok
	82	* purged - op has to start a timer since client-core
	83	* exited uncleanly before servicing op
ed42fe05	84	* given up - submitter has given up waiting for it
f7ab093f	85	*/
8bb8aefd	86	enum orangefs_vfs_op_states {
f7ab093f MM	87	OP_VFS_STATE_UNKNOWN = 0,
	88	OP_VFS_STATE_WAITING = 1,
	89	OP_VFS_STATE_INPROGR = 2,
	90	OP_VFS_STATE_SERVICED = 4,
	91	OP_VFS_STATE_PURGED = 8,
ed42fe05	92	OP_VFS_STATE_GIVEN_UP = 16,
f7ab093f MM	93	};
f7ab093f MM	94
f7ab093f	95	/*
8bb8aefd	96	* orangefs kernel memory related flags
f7ab093f MM	97	*/
f7ab093f MM	98
538e3048	99	#if (defined CONFIG_DEBUG_SLAB)
8bb8aefd	100	#define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE
f7ab093f	101	#else
8bb8aefd	102	#define ORANGEFS_CACHE_CREATE_FLAGS 0
538e3048	103	#endif
f7ab093f	104
8bb8aefd YL	105	extern int orangefs_init_acl(struct inode inode, struct inode dir);
8bb8aefd YL	106	extern const struct xattr_handler *orangefs_xattr_handlers[];
f7ab093f	107
8bb8aefd YL	108	extern struct posix_acl orangefs_get_acl(struct inode inode, int type);
8bb8aefd YL	109	extern int orangefs_set_acl(struct inode inode, struct posix_acl acl, int type);
f7ab093f	110
f7ab093f	111	/*
8bb8aefd	112	* orangefs data structures
f7ab093f	113	*/
8bb8aefd YL	114	struct orangefs_kernel_op_s {
8bb8aefd YL	115	enum orangefs_vfs_op_states op_state;
f7ab093f MM	116	__u64 tag;
	117
	118	/*
d37c0f30 MM	119	* Set uses_shared_memory to non zero if this operation uses
	120	* shared memory. If true, then a retry on the op must also
	121	* get a new shared memory buffer and re-populate it.
	122	* Cancels don't care - it only matters for service_operation()
	123	* retry logics and cancels don't go through it anymore. It
	124	* safely stays non-zero when we use it as slot_to_free.
f7ab093f	125	*/
78699e29 AV	126	union {
	127	int uses_shared_memory;
	128	int slot_to_free;
	129	};
f7ab093f	130
8bb8aefd YL	131	struct orangefs_upcall_s upcall;
8bb8aefd YL	132	struct orangefs_downcall_s downcall;
f7ab093f	133
d2d87a3b	134	struct completion waitq;
f7ab093f MM	135	spinlock_t lock;
f7ab093f MM	136
f7ab093f MM	137	int attempts;
	138
	139	struct list_head list;
	140	};
	141
60831949 AV	142	#define set_op_state_waiting(op) ((op)->op_state = OP_VFS_STATE_WAITING)
60831949 AV	143	#define set_op_state_inprogress(op) ((op)->op_state = OP_VFS_STATE_INPROGR)
2d4cae0d	144	#define set_op_state_given_up(op) ((op)->op_state = OP_VFS_STATE_GIVEN_UP)
60831949 AV	145	static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
	146	{
	147	op->op_state = OP_VFS_STATE_SERVICED;
d2d87a3b	148	complete(&op->waitq);
60831949	149	}
60831949 AV	150
	151	#define op_state_waiting(op) ((op)->op_state & OP_VFS_STATE_WAITING)
	152	#define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
	153	#define op_state_serviced(op) ((op)->op_state & OP_VFS_STATE_SERVICED)
	154	#define op_state_purged(op) ((op)->op_state & OP_VFS_STATE_PURGED)
ed42fe05	155	#define op_state_given_up(op) ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
78699e29	156	#define op_is_cancel(op) ((op)->upcall.type == ORANGEFS_VFS_OP_CANCEL)
ed42fe05	157
c1223ca4	158	void op_release(struct orangefs_kernel_op_s *op);
60831949	159
78699e29 AV	160	extern void orangefs_bufmap_put(int);
	161	static inline void put_cancel(struct orangefs_kernel_op_s *op)
	162	{
	163	orangefs_bufmap_put(op->slot_to_free);
	164	op_release(op);
	165	}
	166
	167	static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
	168	{
	169	spin_lock(&op->lock);
	170	if (unlikely(op_is_cancel(op))) {
05a50a5b	171	list_del_init(&op->list);
78699e29 AV	172	spin_unlock(&op->lock);
	173	put_cancel(op);
	174	} else {
	175	op->op_state \|= OP_VFS_STATE_PURGED;
d2d87a3b	176	complete(&op->waitq);
78699e29 AV	177	spin_unlock(&op->lock);
	178	}
	179	}
	180
8bb8aefd YL	181	/* per inode private orangefs info */
	182	struct orangefs_inode_s {
	183	struct orangefs_object_kref refn;
	184	char link_target[ORANGEFS_NAME_MAX];
f7ab093f MM	185	/*
f7ab093f MM	186	* Reading/Writing Extended attributes need to acquire the appropriate
8bb8aefd	187	* reader/writer semaphore on the orangefs_inode_s structure.
f7ab093f MM	188	*/
	189	struct rw_semaphore xattr_sem;
	190
	191	struct inode vfs_inode;
	192	sector_t last_failed_block_index_read;
	193
71680c18	194	unsigned long getattr_time;
68a24a6c	195	u32 getattr_mask;
f7ab093f MM	196	};
f7ab093f MM	197
8bb8aefd YL	198	/* per superblock private orangefs info */
	199	struct orangefs_sb_info_s {
	200	struct orangefs_khandle root_khandle;
f7ab093f MM	201	__s32 fs_id;
	202	int id;
	203	int flags;
8bb8aefd YL	204	#define ORANGEFS_OPT_INTR 0x01
	205	#define ORANGEFS_OPT_LOCAL_LOCK 0x02
	206	char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
f7ab093f MM	207	struct super_block *sb;
f7ab093f MM	208	int mount_pending;
1ec1688c	209	int no_list;
f7ab093f MM	210	struct list_head list;
	211	};
	212
8bb8aefd	213	struct orangefs_stats {
f7ab093f MM	214	unsigned long cache_hits;
	215	unsigned long cache_misses;
	216	unsigned long reads;
	217	unsigned long writes;
	218	};
	219
889d5f1b	220	extern struct orangefs_stats orangefs_stats;
f7ab093f MM	221
f7ab093f MM	222	/*
54804949 MM	223	* NOTE: See Documentation/filesystems/porting for information
	224	* on implementing FOO_I and properly accessing fs private data
	225	*/
8bb8aefd	226	static inline struct orangefs_inode_s ORANGEFS_I(struct inode inode)
f7ab093f	227	{
8bb8aefd	228	return container_of(inode, struct orangefs_inode_s, vfs_inode);
f7ab093f MM	229	}
f7ab093f MM	230
8bb8aefd	231	static inline struct orangefs_sb_info_s ORANGEFS_SB(struct super_block sb)
f7ab093f	232	{
8bb8aefd	233	return (struct orangefs_sb_info_s *) sb->s_fs_info;
f7ab093f MM	234	}
	235
	236	/* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
8bb8aefd	237	static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
f7ab093f MM	238	{
	239	union {
	240	unsigned char u[8];
	241	__u64 ino;
	242	} ihandle;
	243
	244	ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
	245	ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
	246	ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
	247	ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
	248	ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
	249	ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
	250	ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
	251	ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
	252
	253	return ihandle.ino;
	254	}
	255
8bb8aefd	256	static inline struct orangefs_khandle get_khandle_from_ino(struct inode inode)
f7ab093f	257	{
8bb8aefd	258	return &(ORANGEFS_I(inode)->refn.khandle);
f7ab093f MM	259	}
f7ab093f MM	260
f7ab093f MM	261	static inline int is_root_handle(struct inode *inode)
	262	{
	263	gossip_debug(GOSSIP_DCACHE_DEBUG,
	264	"%s: root handle: %pU, this handle: %pU:\n",
	265	__func__,
8bb8aefd	266	&ORANGEFS_SB(inode->i_sb)->root_khandle,
f7ab093f MM	267	get_khandle_from_ino(inode));
f7ab093f MM	268
8bb8aefd	269	if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
f7ab093f MM	270	get_khandle_from_ino(inode)))
	271	return 0;
	272	else
	273	return 1;
	274	}
	275
8bb8aefd	276	static inline int match_handle(struct orangefs_khandle resp_handle,
f7ab093f MM	277	struct inode *inode)
	278	{
	279	gossip_debug(GOSSIP_DCACHE_DEBUG,
	280	"%s: one handle: %pU, another handle:%pU:\n",
	281	__func__,
	282	&resp_handle,
	283	get_khandle_from_ino(inode));
	284
8bb8aefd	285	if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
f7ab093f MM	286	return 0;
	287	else
	288	return 1;
	289	}
	290
	291	/*
8bb8aefd	292	* defined in orangefs-cache.c
f7ab093f MM	293	*/
	294	int op_cache_initialize(void);
	295	int op_cache_finalize(void);
8bb8aefd	296	struct orangefs_kernel_op_s *op_alloc(__s32 type);
78699e29	297	void orangefs_new_tag(struct orangefs_kernel_op_s *op);
8bb8aefd	298	char get_opname_string(struct orangefs_kernel_op_s new_op);
f7ab093f	299
8bb8aefd YL	300	int orangefs_inode_cache_initialize(void);
8bb8aefd YL	301	int orangefs_inode_cache_finalize(void);
f7ab093f	302
f7ab093f	303	/*
8bb8aefd	304	* defined in orangefs-mod.c
f7ab093f MM	305	*/
	306	void purge_inprogress_ops(void);
	307
	308	/*
	309	* defined in waitqueue.c
	310	*/
f7ab093f MM	311	void purge_waiting_ops(void);
	312
	313	/*
	314	* defined in super.c
	315	*/
482664dd MB	316	extern uint64_t orangefs_features;
482664dd MB	317
8bb8aefd	318	struct dentry orangefs_mount(struct file_system_type fst,
f7ab093f MM	319	int flags,
	320	const char *devname,
	321	void *data);
	322
8bb8aefd	323	void orangefs_kill_sb(struct super_block *sb);
45996492	324	int orangefs_remount(struct orangefs_sb_info_s *);
f7ab093f MM	325
	326	int fsid_key_table_initialize(void);
	327	void fsid_key_table_finalize(void);
	328
	329	/*
	330	* defined in inode.c
	331	*/
8bb8aefd	332	struct inode orangefs_new_inode(struct super_block sb,
f7ab093f MM	333	struct inode *dir,
	334	int mode,
	335	dev_t dev,
8bb8aefd	336	struct orangefs_object_kref *ref);
f7ab093f	337
8bb8aefd	338	int orangefs_setattr(struct dentry dentry, struct iattr iattr);
f7ab093f	339
a528d35e DH	340	int orangefs_getattr(const struct path path, struct kstat stat,
a528d35e DH	341	u32 request_mask, unsigned int flags);
f7ab093f	342
933287da MB	343	int orangefs_permission(struct inode *inode, int mask);
933287da MB	344
95582b00	345	int orangefs_update_time(struct inode , struct timespec64 , int);
a55f2d86	346
f7ab093f MM	347	/*
	348	* defined in xattr.c
	349	*/
8bb8aefd	350	ssize_t orangefs_listxattr(struct dentry dentry, char buffer, size_t size);
f7ab093f MM	351
	352	/*
	353	* defined in namei.c
	354	*/
8bb8aefd YL	355	struct inode orangefs_iget(struct super_block sb,
8bb8aefd YL	356	struct orangefs_object_kref *ref);
f7ab093f	357
8bb8aefd YL	358	ssize_t orangefs_inode_read(struct inode *inode,
	359	struct iov_iter *iter,
	360	loff_t *offset,
	361	loff_t readahead_size);
f7ab093f MM	362
f7ab093f MM	363	/*
8bb8aefd	364	* defined in devorangefs-req.c
f7ab093f	365	*/
482664dd	366	extern uint32_t orangefs_userspace_version;
f2ee3b75	367
8bb8aefd YL	368	int orangefs_dev_init(void);
8bb8aefd YL	369	void orangefs_dev_cleanup(void);
f7ab093f	370	int is_daemon_in_service(void);
78699e29	371	bool __is_daemon_in_service(void);
f7ab093f MM	372
f7ab093f MM	373	/*
8bb8aefd	374	* defined in orangefs-utils.c
f7ab093f	375	*/
8bb8aefd	376	__s32 fsid_of_op(struct orangefs_kernel_op_s *op);
f7ab093f	377
8bb8aefd	378	ssize_t orangefs_inode_getxattr(struct inode *inode,
f7ab093f MM	379	const char *name,
	380	void *buffer,
	381	size_t size);
	382
8bb8aefd	383	int orangefs_inode_setxattr(struct inode *inode,
f7ab093f MM	384	const char *name,
	385	const void *value,
	386	size_t size,
	387	int flags);
	388
68a24a6c MB	389	int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
68a24a6c MB	390	u32 request_mask);
f7ab093f	391
5859d77e MB	392	int orangefs_inode_check_changed(struct inode *inode);
5859d77e MB	393
8bb8aefd	394	int orangefs_inode_setattr(struct inode inode, struct iattr iattr);
f7ab093f	395
78699e29	396	bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op);
f7ab093f	397
8bb8aefd	398	int orangefs_normalize_to_errno(__s32 error_code);
f7ab093f	399
1d503617	400	extern struct mutex orangefs_request_mutex;
f7ab093f MM	401	extern int op_timeout_secs;
f7ab093f MM	402	extern int slot_timeout_secs;
1d503617 MB	403	extern int orangefs_dcache_timeout_msecs;
1d503617 MB	404	extern int orangefs_getattr_timeout_msecs;
8bb8aefd YL	405	extern struct list_head orangefs_superblocks;
	406	extern spinlock_t orangefs_superblocks_lock;
	407	extern struct list_head orangefs_request_list;
	408	extern spinlock_t orangefs_request_list_lock;
	409	extern wait_queue_head_t orangefs_request_list_waitq;
1d503617 MB	410	extern struct list_head *orangefs_htable_ops_in_progress;
1d503617 MB	411	extern spinlock_t orangefs_htable_ops_in_progress_lock;
f7ab093f MM	412	extern int hash_table_size;
f7ab093f MM	413
8bb8aefd	414	extern const struct file_operations orangefs_file_operations;
6f3fc107 AV	415	extern const struct inode_operations orangefs_symlink_inode_operations;
6f3fc107 AV	416	extern const struct inode_operations orangefs_dir_inode_operations;
8bb8aefd YL	417	extern const struct file_operations orangefs_dir_operations;
8bb8aefd YL	418	extern const struct dentry_operations orangefs_dentry_operations;
f7ab093f	419
f7ab093f MM	420	/*
	421	* misc convenience macros
	422	*/
f7ab093f	423
8bb8aefd YL	424	#define ORANGEFS_OP_INTERRUPTIBLE 1 /* service_operation() is interruptible */
	425	#define ORANGEFS_OP_PRIORITY 2 /* service_operation() is high priority */
	426	#define ORANGEFS_OP_CANCELLATION 4 /* this is a cancellation */
adcf34a2	427	#define ORANGEFS_OP_NO_MUTEX 8 /* don't acquire request_mutex */
8bb8aefd	428	#define ORANGEFS_OP_ASYNC 16 /* Queue it, but don't wait */
f7ab093f	429
8bb8aefd	430	int service_operation(struct orangefs_kernel_op_s *op,
f7ab093f MM	431	const char *op_name,
	432	int flags);
	433
f7ab093f	434	#define get_interruptible_flag(inode) \
8bb8aefd YL	435	((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
8bb8aefd YL	436	ORANGEFS_OP_INTERRUPTIBLE : 0)
f7ab093f	437
f7ab093f MM	438	#define fill_default_sys_attrs(sys_attr, type, mode) \
f7ab093f MM	439	do { \
78fee0b6 JH	440	sys_attr.owner = from_kuid(&init_user_ns, current_fsuid()); \
78fee0b6 JH	441	sys_attr.group = from_kgid(&init_user_ns, current_fsgid()); \
8bb8aefd	442	sys_attr.perms = ORANGEFS_util_translate_mode(mode); \
69a23de2 MB	443	sys_attr.mtime = 0; \
	444	sys_attr.atime = 0; \
	445	sys_attr.ctime = 0; \
8bb8aefd	446	sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE; \
f7ab093f MM	447	} while (0)
f7ab093f MM	448
804b1737 MS	449	static inline void orangefs_set_timeout(struct dentry *dentry)
	450	{
	451	unsigned long time = jiffies + orangefs_dcache_timeout_msecs*HZ/1000;
	452
	453	dentry->d_fsdata = (void *) time;
	454	}
	455
8bb8aefd	456	#endif /* __ORANGEFSKERNEL_H */