// SPDX-License-Identifier: GPL-2.0
/*
* (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,
0,
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_RA_FLUSH)
return "OP_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" ;
else if (type == ORANGEFS_VFS_OP_FEATURES)
return "OP_FEATURES" ;
}
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(&init_user_ns,
current_fsuid());
new_op->upcall.gid = from_kgid(&init_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" );
}
}
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