diff options
Diffstat (limited to 'fs/orangefs/orangefs-cache.c')
| -rw-r--r-- | fs/orangefs/orangefs-cache.c | 161 |
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 000000000000..900a2e38e11b --- /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"); + } +} |