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/*
* (C) 2001 Clemson University and The University of Chicago
*
* See COPYING in top-level directory.
*/
#include "protocol.h"
#include "pvfs2-kernel.h"
/* tags assigned to kernel upcall operations */
static __u64 next_tag_value;
static DEFINE_SPINLOCK(next_tag_value_lock);
/* the pvfs2 memory caches */
/* a cache for pvfs2 upcall/downcall operations */
static struct kmem_cache *op_cache;
/* a cache for device (/dev/pvfs2-req) communication */
static struct kmem_cache *dev_req_cache;
/* a cache for pvfs2_kiocb objects (i.e pvfs2 iocb structures ) */
static struct kmem_cache *pvfs2_kiocb_cache;
int op_cache_initialize(void)
{
op_cache = kmem_cache_create("pvfs2_op_cache",
sizeof(struct pvfs2_kernel_op_s),
0,
PVFS2_CACHE_CREATE_FLAGS,
NULL);
if (!op_cache) {
gossip_err("Cannot create pvfs2_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 pvfs2_kernel_op_s *new_op)
{
if (new_op) {
__s32 type = new_op->upcall.type;
if (type == PVFS2_VFS_OP_FILE_IO)
return "OP_FILE_IO";
else if (type == PVFS2_VFS_OP_LOOKUP)
return "OP_LOOKUP";
else if (type == PVFS2_VFS_OP_CREATE)
return "OP_CREATE";
else if (type == PVFS2_VFS_OP_GETATTR)
return "OP_GETATTR";
else if (type == PVFS2_VFS_OP_REMOVE)
return "OP_REMOVE";
else if (type == PVFS2_VFS_OP_MKDIR)
return "OP_MKDIR";
else if (type == PVFS2_VFS_OP_READDIR)
return "OP_READDIR";
else if (type == PVFS2_VFS_OP_READDIRPLUS)
return "OP_READDIRPLUS";
else if (type == PVFS2_VFS_OP_SETATTR)
return "OP_SETATTR";
else if (type == PVFS2_VFS_OP_SYMLINK)
return "OP_SYMLINK";
else if (type == PVFS2_VFS_OP_RENAME)
return "OP_RENAME";
else if (type == PVFS2_VFS_OP_STATFS)
return "OP_STATFS";
else if (type == PVFS2_VFS_OP_TRUNCATE)
return "OP_TRUNCATE";
else if (type == PVFS2_VFS_OP_MMAP_RA_FLUSH)
return "OP_MMAP_RA_FLUSH";
else if (type == PVFS2_VFS_OP_FS_MOUNT)
return "OP_FS_MOUNT";
else if (type == PVFS2_VFS_OP_FS_UMOUNT)
return "OP_FS_UMOUNT";
else if (type == PVFS2_VFS_OP_GETXATTR)
return "OP_GETXATTR";
else if (type == PVFS2_VFS_OP_SETXATTR)
return "OP_SETXATTR";
else if (type == PVFS2_VFS_OP_LISTXATTR)
return "OP_LISTXATTR";
else if (type == PVFS2_VFS_OP_REMOVEXATTR)
return "OP_REMOVEXATTR";
else if (type == PVFS2_VFS_OP_PARAM)
return "OP_PARAM";
else if (type == PVFS2_VFS_OP_PERF_COUNT)
return "OP_PERF_COUNT";
else if (type == PVFS2_VFS_OP_CANCEL)
return "OP_CANCEL";
else if (type == PVFS2_VFS_OP_FSYNC)
return "OP_FSYNC";
else if (type == PVFS2_VFS_OP_FSKEY)
return "OP_FSKEY";
}
return "OP_UNKNOWN?";
}
struct pvfs2_kernel_op_s *op_alloc(__s32 type)
{
struct pvfs2_kernel_op_s *new_op = NULL;
new_op = kmem_cache_alloc(op_cache, PVFS2_CACHE_ALLOC_FLAGS);
if (new_op) {
memset(new_op, 0, sizeof(struct pvfs2_kernel_op_s));
INIT_LIST_HEAD(&new_op->list);
spin_lock_init(&new_op->lock);
init_waitqueue_head(&new_op->waitq);
init_waitqueue_head(&new_op->io_completion_waitq);
atomic_set(&new_op->aio_ref_count, 0);
pvfs2_op_initialize(new_op);
/* initialize the op specific tag and upcall credentials */
spin_lock(&next_tag_value_lock);
new_op->tag = next_tag_value++;
if (next_tag_value == 0)
next_tag_value = 100;
spin_unlock(&next_tag_value_lock);
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_alloc failed!\n");
}
return new_op;
}
void op_release(struct pvfs2_kernel_op_s *pvfs2_op)
{
if (pvfs2_op) {
gossip_debug(GOSSIP_CACHE_DEBUG,
"Releasing OP (%p: %llu)\n",
pvfs2_op,
llu(pvfs2_op->tag));
pvfs2_op_initialize(pvfs2_op);
kmem_cache_free(op_cache, pvfs2_op);
} else {
gossip_err("NULL pointer in op_release\n");
}
}
int dev_req_cache_initialize(void)
{
dev_req_cache = kmem_cache_create("pvfs2_devreqcache",
MAX_ALIGNED_DEV_REQ_DOWNSIZE,
0,
PVFS2_CACHE_CREATE_FLAGS,
NULL);
if (!dev_req_cache) {
gossip_err("Cannot create pvfs2_dev_req_cache\n");
return -ENOMEM;
}
return 0;
}
int dev_req_cache_finalize(void)
{
kmem_cache_destroy(dev_req_cache);
return 0;
}
void *dev_req_alloc(void)
{
void *buffer;
buffer = kmem_cache_alloc(dev_req_cache, PVFS2_CACHE_ALLOC_FLAGS);
if (buffer == NULL)
gossip_err("Failed to allocate from dev_req_cache\n");
else
memset(buffer, 0, sizeof(MAX_ALIGNED_DEV_REQ_DOWNSIZE));
return buffer;
}
void dev_req_release(void *buffer)
{
if (buffer)
kmem_cache_free(dev_req_cache, buffer);
else
gossip_err("NULL pointer passed to dev_req_release\n");
}
int kiocb_cache_initialize(void)
{
pvfs2_kiocb_cache = kmem_cache_create("pvfs2_kiocbcache",
sizeof(struct pvfs2_kiocb_s),
0,
PVFS2_CACHE_CREATE_FLAGS,
NULL);
if (!pvfs2_kiocb_cache) {
gossip_err("Cannot create pvfs2_kiocb_cache!\n");
return -ENOMEM;
}
return 0;
}
int kiocb_cache_finalize(void)
{
kmem_cache_destroy(pvfs2_kiocb_cache);
return 0;
}
struct pvfs2_kiocb_s *kiocb_alloc(void)
{
struct pvfs2_kiocb_s *x = NULL;
x = kmem_cache_alloc(pvfs2_kiocb_cache, PVFS2_CACHE_ALLOC_FLAGS);
if (x == NULL)
gossip_err("kiocb_alloc: kmem_cache_alloc failed!\n");
else
memset(x, 0, sizeof(struct pvfs2_kiocb_s));
return x;
}
void kiocb_release(struct pvfs2_kiocb_s *x)
{
if (x)
kmem_cache_free(pvfs2_kiocb_cache, x);
else
gossip_err("kiocb_release: kmem_cache_free NULL pointer!\n");
}
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