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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
commitd635711daa98be86d4c7fd01499c34f566b54ccb (patch)
treeaa5cc3760a27c3d57146498cb82fa549547de06c /fs/orangefs/orangefs-cache.c
parentc91265cd0efb83778f015b4d4b1129bd2cfd075e (diff)
Linux-libre 4.6.2-gnu
Diffstat (limited to 'fs/orangefs/orangefs-cache.c')
-rw-r--r--fs/orangefs/orangefs-cache.c161
1 files changed, 161 insertions, 0 deletions
diff --git a/fs/orangefs/orangefs-cache.c b/fs/orangefs/orangefs-cache.c
new file mode 100644
index 000000000..900a2e38e
--- /dev/null
+++ b/fs/orangefs/orangefs-cache.c
@@ -0,0 +1,161 @@
+/*
+ * (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");
+ }
+}