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![Martin Brandenburg](/assets/img/avatar_default.png)
This is a new userspace operation, which will be done if the client-core version is greater than or equal to 2.9.6. This will provide a way to implement optional features and to determine which features are supported by the client-core. If the client-core version is older than 2.9.6, no optional features are supported and the op will not be done. The intent is to allow protocol extensions without relying on the client-core's current behavior of ignoring what it doesn't understand. Signed-off-by: Martin Brandenburg <martin@omnibond.com>
163 lines
4.2 KiB
C
163 lines
4.2 KiB
C
/*
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* (C) 2001 Clemson University and The University of Chicago
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*
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* See COPYING in top-level directory.
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*/
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#include "protocol.h"
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#include "orangefs-kernel.h"
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/* tags assigned to kernel upcall operations */
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static __u64 next_tag_value;
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static DEFINE_SPINLOCK(next_tag_value_lock);
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/* the orangefs memory caches */
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/* a cache for orangefs upcall/downcall operations */
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static struct kmem_cache *op_cache;
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int op_cache_initialize(void)
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{
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op_cache = kmem_cache_create("orangefs_op_cache",
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sizeof(struct orangefs_kernel_op_s),
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0,
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ORANGEFS_CACHE_CREATE_FLAGS,
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NULL);
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if (!op_cache) {
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gossip_err("Cannot create orangefs_op_cache\n");
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return -ENOMEM;
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}
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/* initialize our atomic tag counter */
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spin_lock(&next_tag_value_lock);
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next_tag_value = 100;
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spin_unlock(&next_tag_value_lock);
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return 0;
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}
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int op_cache_finalize(void)
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{
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kmem_cache_destroy(op_cache);
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return 0;
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}
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char *get_opname_string(struct orangefs_kernel_op_s *new_op)
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{
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if (new_op) {
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__s32 type = new_op->upcall.type;
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if (type == ORANGEFS_VFS_OP_FILE_IO)
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return "OP_FILE_IO";
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else if (type == ORANGEFS_VFS_OP_LOOKUP)
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return "OP_LOOKUP";
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else if (type == ORANGEFS_VFS_OP_CREATE)
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return "OP_CREATE";
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else if (type == ORANGEFS_VFS_OP_GETATTR)
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return "OP_GETATTR";
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else if (type == ORANGEFS_VFS_OP_REMOVE)
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return "OP_REMOVE";
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else if (type == ORANGEFS_VFS_OP_MKDIR)
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return "OP_MKDIR";
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else if (type == ORANGEFS_VFS_OP_READDIR)
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return "OP_READDIR";
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else if (type == ORANGEFS_VFS_OP_READDIRPLUS)
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return "OP_READDIRPLUS";
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else if (type == ORANGEFS_VFS_OP_SETATTR)
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return "OP_SETATTR";
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else if (type == ORANGEFS_VFS_OP_SYMLINK)
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return "OP_SYMLINK";
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else if (type == ORANGEFS_VFS_OP_RENAME)
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return "OP_RENAME";
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else if (type == ORANGEFS_VFS_OP_STATFS)
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return "OP_STATFS";
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else if (type == ORANGEFS_VFS_OP_TRUNCATE)
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return "OP_TRUNCATE";
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else if (type == ORANGEFS_VFS_OP_RA_FLUSH)
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return "OP_RA_FLUSH";
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else if (type == ORANGEFS_VFS_OP_FS_MOUNT)
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return "OP_FS_MOUNT";
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else if (type == ORANGEFS_VFS_OP_FS_UMOUNT)
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return "OP_FS_UMOUNT";
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else if (type == ORANGEFS_VFS_OP_GETXATTR)
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return "OP_GETXATTR";
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else if (type == ORANGEFS_VFS_OP_SETXATTR)
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return "OP_SETXATTR";
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else if (type == ORANGEFS_VFS_OP_LISTXATTR)
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return "OP_LISTXATTR";
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else if (type == ORANGEFS_VFS_OP_REMOVEXATTR)
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return "OP_REMOVEXATTR";
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else if (type == ORANGEFS_VFS_OP_PARAM)
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return "OP_PARAM";
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else if (type == ORANGEFS_VFS_OP_PERF_COUNT)
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return "OP_PERF_COUNT";
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else if (type == ORANGEFS_VFS_OP_CANCEL)
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return "OP_CANCEL";
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else if (type == ORANGEFS_VFS_OP_FSYNC)
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return "OP_FSYNC";
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else if (type == ORANGEFS_VFS_OP_FSKEY)
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return "OP_FSKEY";
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else if (type == ORANGEFS_VFS_OP_FEATURES)
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return "OP_FEATURES";
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}
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return "OP_UNKNOWN?";
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}
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void orangefs_new_tag(struct orangefs_kernel_op_s *op)
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{
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spin_lock(&next_tag_value_lock);
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op->tag = next_tag_value++;
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if (next_tag_value == 0)
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next_tag_value = 100;
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spin_unlock(&next_tag_value_lock);
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}
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struct orangefs_kernel_op_s *op_alloc(__s32 type)
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{
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struct orangefs_kernel_op_s *new_op = NULL;
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new_op = kmem_cache_zalloc(op_cache, GFP_KERNEL);
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if (new_op) {
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INIT_LIST_HEAD(&new_op->list);
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spin_lock_init(&new_op->lock);
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init_completion(&new_op->waitq);
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new_op->upcall.type = ORANGEFS_VFS_OP_INVALID;
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new_op->downcall.type = ORANGEFS_VFS_OP_INVALID;
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new_op->downcall.status = -1;
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new_op->op_state = OP_VFS_STATE_UNKNOWN;
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/* initialize the op specific tag and upcall credentials */
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orangefs_new_tag(new_op);
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new_op->upcall.type = type;
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new_op->attempts = 0;
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gossip_debug(GOSSIP_CACHE_DEBUG,
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"Alloced OP (%p: %llu %s)\n",
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new_op,
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llu(new_op->tag),
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get_opname_string(new_op));
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new_op->upcall.uid = from_kuid(&init_user_ns,
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current_fsuid());
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new_op->upcall.gid = from_kgid(&init_user_ns,
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current_fsgid());
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} else {
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gossip_err("op_alloc: kmem_cache_zalloc failed!\n");
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}
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return new_op;
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}
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void op_release(struct orangefs_kernel_op_s *orangefs_op)
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{
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if (orangefs_op) {
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gossip_debug(GOSSIP_CACHE_DEBUG,
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"Releasing OP (%p: %llu)\n",
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orangefs_op,
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llu(orangefs_op->tag));
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kmem_cache_free(op_cache, orangefs_op);
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} else {
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gossip_err("NULL pointer in op_release\n");
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}
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}
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