[linux-2.6-block.git] / fs / orangefs / orangefs-cache.c

/*
 * (C) 2001 Clemson University and The University of Chicago
 *
 * See COPYING in top-level directory.
 */

#include "protocol.h"
#include "orangefs-kernel.h"

/* tags assigned to kernel upcall operations */
static __u64 next_tag_value;
static DEFINE_SPINLOCK(next_tag_value_lock);

/* the orangefs memory caches */

/* a cache for orangefs upcall/downcall operations */
static struct kmem_cache *op_cache;

int op_cache_initialize(void)
{
	op_cache = kmem_cache_create("orangefs_op_cache",
				     sizeof(struct orangefs_kernel_op_s),
				     0,
				     ORANGEFS_CACHE_CREATE_FLAGS,
				     NULL);

	if (!op_cache) {
		gossip_err("Cannot create orangefs_op_cache\n");
		return -ENOMEM;
	}

	/* initialize our atomic tag counter */
	spin_lock(&next_tag_value_lock);
	next_tag_value = 100;
	spin_unlock(&next_tag_value_lock);
	return 0;
}

int op_cache_finalize(void)
{
	kmem_cache_destroy(op_cache);
	return 0;
}

char *get_opname_string(struct orangefs_kernel_op_s *new_op)
{
	if (new_op) {
		__s32 type = new_op->upcall.type;

		if (type == ORANGEFS_VFS_OP_FILE_IO)
			return "OP_FILE_IO";
		else if (type == ORANGEFS_VFS_OP_LOOKUP)
			return "OP_LOOKUP";
		else if (type == ORANGEFS_VFS_OP_CREATE)
			return "OP_CREATE";
		else if (type == ORANGEFS_VFS_OP_GETATTR)
			return "OP_GETATTR";
		else if (type == ORANGEFS_VFS_OP_REMOVE)
			return "OP_REMOVE";
		else if (type == ORANGEFS_VFS_OP_MKDIR)
			return "OP_MKDIR";
		else if (type == ORANGEFS_VFS_OP_READDIR)
			return "OP_READDIR";
		else if (type == ORANGEFS_VFS_OP_READDIRPLUS)
			return "OP_READDIRPLUS";
		else if (type == ORANGEFS_VFS_OP_SETATTR)
			return "OP_SETATTR";
		else if (type == ORANGEFS_VFS_OP_SYMLINK)
			return "OP_SYMLINK";
		else if (type == ORANGEFS_VFS_OP_RENAME)
			return "OP_RENAME";
		else if (type == ORANGEFS_VFS_OP_STATFS)
			return "OP_STATFS";
		else if (type == ORANGEFS_VFS_OP_TRUNCATE)
			return "OP_TRUNCATE";
		else if (type == ORANGEFS_VFS_OP_MMAP_RA_FLUSH)
			return "OP_MMAP_RA_FLUSH";
		else if (type == ORANGEFS_VFS_OP_FS_MOUNT)
			return "OP_FS_MOUNT";
		else if (type == ORANGEFS_VFS_OP_FS_UMOUNT)
			return "OP_FS_UMOUNT";
		else if (type == ORANGEFS_VFS_OP_GETXATTR)
			return "OP_GETXATTR";
		else if (type == ORANGEFS_VFS_OP_SETXATTR)
			return "OP_SETXATTR";
		else if (type == ORANGEFS_VFS_OP_LISTXATTR)
			return "OP_LISTXATTR";
		else if (type == ORANGEFS_VFS_OP_REMOVEXATTR)
			return "OP_REMOVEXATTR";
		else if (type == ORANGEFS_VFS_OP_PARAM)
			return "OP_PARAM";
		else if (type == ORANGEFS_VFS_OP_PERF_COUNT)
			return "OP_PERF_COUNT";
		else if (type == ORANGEFS_VFS_OP_CANCEL)
			return "OP_CANCEL";
		else if (type == ORANGEFS_VFS_OP_FSYNC)
			return "OP_FSYNC";
		else if (type == ORANGEFS_VFS_OP_FSKEY)
			return "OP_FSKEY";
	}
	return "OP_UNKNOWN?";
}

void orangefs_new_tag(struct orangefs_kernel_op_s *op)
{
	spin_lock(&next_tag_value_lock);
	op->tag = next_tag_value++;
	if (next_tag_value == 0)
		next_tag_value = 100;
	spin_unlock(&next_tag_value_lock);
}

struct orangefs_kernel_op_s *op_alloc(__s32 type)
{
	struct orangefs_kernel_op_s *new_op = NULL;

	new_op = kmem_cache_zalloc(op_cache, GFP_KERNEL);
	if (new_op) {
		INIT_LIST_HEAD(&new_op->list);
		spin_lock_init(&new_op->lock);
		init_completion(&new_op->waitq);

		new_op->upcall.type = ORANGEFS_VFS_OP_INVALID;
		new_op->downcall.type = ORANGEFS_VFS_OP_INVALID;
		new_op->downcall.status = -1;

		new_op->op_state = OP_VFS_STATE_UNKNOWN;

		/* initialize the op specific tag and upcall credentials */
		orangefs_new_tag(new_op);
		new_op->upcall.type = type;
		new_op->attempts = 0;
		gossip_debug(GOSSIP_CACHE_DEBUG,
			     "Alloced OP (%p: %llu %s)\n",
			     new_op,
			     llu(new_op->tag),
			     get_opname_string(new_op));

		new_op->upcall.uid = from_kuid(current_user_ns(),
					       current_fsuid());

		new_op->upcall.gid = from_kgid(current_user_ns(),
					       current_fsgid());
	} else {
		gossip_err("op_alloc: kmem_cache_zalloc failed!\n");
	}
	return new_op;
}

void op_release(struct orangefs_kernel_op_s *orangefs_op)
{
	if (orangefs_op) {
		gossip_debug(GOSSIP_CACHE_DEBUG,
			     "Releasing OP (%p: %llu)\n",
			     orangefs_op,
			     llu(orangefs_op->tag));
		kmem_cache_free(op_cache, orangefs_op);
	} else {
		gossip_err("NULL pointer in op_release\n");
	}
}
Commit	Line	Data
274dcf55 MM	1	/*
	2	* (C) 2001 Clemson University and The University of Chicago
	3	*
	4	* See COPYING in top-level directory.
	5	*/
	6
	7	#include "protocol.h"
575e9461	8	#include "orangefs-kernel.h"
274dcf55 MM	9
	10	/* tags assigned to kernel upcall operations */
	11	static __u64 next_tag_value;
	12	static DEFINE_SPINLOCK(next_tag_value_lock);
	13
8bb8aefd	14	/* the orangefs memory caches */
274dcf55	15
8bb8aefd	16	/* a cache for orangefs upcall/downcall operations */
274dcf55 MM	17	static struct kmem_cache *op_cache;
274dcf55 MM	18
274dcf55 MM	19	int op_cache_initialize(void)
274dcf55 MM	20	{
8bb8aefd YL	21	op_cache = kmem_cache_create("orangefs_op_cache",
8bb8aefd YL	22	sizeof(struct orangefs_kernel_op_s),
274dcf55	23	0,
8bb8aefd	24	ORANGEFS_CACHE_CREATE_FLAGS,
274dcf55 MM	25	NULL);
	26
	27	if (!op_cache) {
8bb8aefd	28	gossip_err("Cannot create orangefs_op_cache\n");
274dcf55 MM	29	return -ENOMEM;
	30	}
	31
	32	/* initialize our atomic tag counter */
	33	spin_lock(&next_tag_value_lock);
	34	next_tag_value = 100;
	35	spin_unlock(&next_tag_value_lock);
	36	return 0;
	37	}
	38
	39	int op_cache_finalize(void)
	40	{
	41	kmem_cache_destroy(op_cache);
	42	return 0;
	43	}
	44
8bb8aefd	45	char get_opname_string(struct orangefs_kernel_op_s new_op)
274dcf55 MM	46	{
	47	if (new_op) {
	48	__s32 type = new_op->upcall.type;
	49
8bb8aefd	50	if (type == ORANGEFS_VFS_OP_FILE_IO)
274dcf55	51	return "OP_FILE_IO";
8bb8aefd	52	else if (type == ORANGEFS_VFS_OP_LOOKUP)
274dcf55	53	return "OP_LOOKUP";
8bb8aefd	54	else if (type == ORANGEFS_VFS_OP_CREATE)
274dcf55	55	return "OP_CREATE";
8bb8aefd	56	else if (type == ORANGEFS_VFS_OP_GETATTR)
274dcf55	57	return "OP_GETATTR";
8bb8aefd	58	else if (type == ORANGEFS_VFS_OP_REMOVE)
274dcf55	59	return "OP_REMOVE";
8bb8aefd	60	else if (type == ORANGEFS_VFS_OP_MKDIR)
274dcf55	61	return "OP_MKDIR";
8bb8aefd	62	else if (type == ORANGEFS_VFS_OP_READDIR)
274dcf55	63	return "OP_READDIR";
8bb8aefd	64	else if (type == ORANGEFS_VFS_OP_READDIRPLUS)
274dcf55	65	return "OP_READDIRPLUS";
8bb8aefd	66	else if (type == ORANGEFS_VFS_OP_SETATTR)
274dcf55	67	return "OP_SETATTR";
8bb8aefd	68	else if (type == ORANGEFS_VFS_OP_SYMLINK)
274dcf55	69	return "OP_SYMLINK";
8bb8aefd	70	else if (type == ORANGEFS_VFS_OP_RENAME)
274dcf55	71	return "OP_RENAME";
8bb8aefd	72	else if (type == ORANGEFS_VFS_OP_STATFS)
274dcf55	73	return "OP_STATFS";
8bb8aefd	74	else if (type == ORANGEFS_VFS_OP_TRUNCATE)
274dcf55	75	return "OP_TRUNCATE";
8bb8aefd	76	else if (type == ORANGEFS_VFS_OP_MMAP_RA_FLUSH)
274dcf55	77	return "OP_MMAP_RA_FLUSH";
8bb8aefd	78	else if (type == ORANGEFS_VFS_OP_FS_MOUNT)
274dcf55	79	return "OP_FS_MOUNT";
8bb8aefd	80	else if (type == ORANGEFS_VFS_OP_FS_UMOUNT)
274dcf55	81	return "OP_FS_UMOUNT";
8bb8aefd	82	else if (type == ORANGEFS_VFS_OP_GETXATTR)
274dcf55	83	return "OP_GETXATTR";
8bb8aefd	84	else if (type == ORANGEFS_VFS_OP_SETXATTR)
274dcf55	85	return "OP_SETXATTR";
8bb8aefd	86	else if (type == ORANGEFS_VFS_OP_LISTXATTR)
274dcf55	87	return "OP_LISTXATTR";
8bb8aefd	88	else if (type == ORANGEFS_VFS_OP_REMOVEXATTR)
274dcf55	89	return "OP_REMOVEXATTR";
8bb8aefd	90	else if (type == ORANGEFS_VFS_OP_PARAM)
274dcf55	91	return "OP_PARAM";
8bb8aefd	92	else if (type == ORANGEFS_VFS_OP_PERF_COUNT)
274dcf55	93	return "OP_PERF_COUNT";
8bb8aefd	94	else if (type == ORANGEFS_VFS_OP_CANCEL)
274dcf55	95	return "OP_CANCEL";
8bb8aefd	96	else if (type == ORANGEFS_VFS_OP_FSYNC)
274dcf55	97	return "OP_FSYNC";
8bb8aefd	98	else if (type == ORANGEFS_VFS_OP_FSKEY)
274dcf55	99	return "OP_FSKEY";
274dcf55 MM	100	}
	101	return "OP_UNKNOWN?";
	102	}
	103
78699e29 AV	104	void orangefs_new_tag(struct orangefs_kernel_op_s *op)
	105	{
	106	spin_lock(&next_tag_value_lock);
	107	op->tag = next_tag_value++;
	108	if (next_tag_value == 0)
	109	next_tag_value = 100;
	110	spin_unlock(&next_tag_value_lock);
	111	}
	112
8bb8aefd	113	struct orangefs_kernel_op_s *op_alloc(__s32 type)
274dcf55	114	{
8bb8aefd	115	struct orangefs_kernel_op_s *new_op = NULL;
274dcf55	116
2d4cae0d	117	new_op = kmem_cache_zalloc(op_cache, GFP_KERNEL);
274dcf55	118	if (new_op) {
274dcf55 MM	119	INIT_LIST_HEAD(&new_op->list);
274dcf55 MM	120	spin_lock_init(&new_op->lock);
d2d87a3b	121	init_completion(&new_op->waitq);
274dcf55	122
115b93a8 AV	123	new_op->upcall.type = ORANGEFS_VFS_OP_INVALID;
	124	new_op->downcall.type = ORANGEFS_VFS_OP_INVALID;
	125	new_op->downcall.status = -1;
	126
	127	new_op->op_state = OP_VFS_STATE_UNKNOWN;
274dcf55 MM	128
274dcf55 MM	129	/* initialize the op specific tag and upcall credentials */
78699e29	130	orangefs_new_tag(new_op);
274dcf55 MM	131	new_op->upcall.type = type;
	132	new_op->attempts = 0;
	133	gossip_debug(GOSSIP_CACHE_DEBUG,
	134	"Alloced OP (%p: %llu %s)\n",
	135	new_op,
	136	llu(new_op->tag),
	137	get_opname_string(new_op));
	138
	139	new_op->upcall.uid = from_kuid(current_user_ns(),
	140	current_fsuid());
	141
	142	new_op->upcall.gid = from_kgid(current_user_ns(),
	143	current_fsgid());
274dcf55	144	} else {
2d4cae0d	145	gossip_err("op_alloc: kmem_cache_zalloc failed!\n");
274dcf55 MM	146	}
	147	return new_op;
	148	}
	149
c1223ca4	150	void op_release(struct orangefs_kernel_op_s *orangefs_op)
274dcf55	151	{
8bb8aefd	152	if (orangefs_op) {
274dcf55 MM	153	gossip_debug(GOSSIP_CACHE_DEBUG,
274dcf55 MM	154	"Releasing OP (%p: %llu)\n",
8bb8aefd YL	155	orangefs_op,
8bb8aefd YL	156	llu(orangefs_op->tag));
8bb8aefd	157	kmem_cache_free(op_cache, orangefs_op);
274dcf55 MM	158	} else {
	159	gossip_err("NULL pointer in op_release\n");
	160	}
	161	}