diff options
Diffstat (limited to 'xlators/storage/bd/src/bd.h')
| -rw-r--r-- | xlators/storage/bd/src/bd.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/xlators/storage/bd/src/bd.h b/xlators/storage/bd/src/bd.h new file mode 100644 index 000000000..34b4c9e22 --- /dev/null +++ b/xlators/storage/bd/src/bd.h @@ -0,0 +1,178 @@ +/* + BD translator - Exports Block devices on server side as regular + files to client + + Copyright IBM, Corp. 2012 + + This file is part of GlusterFS. + + Author: + M. Mohan Kumar <mohan@in.ibm.com> + + This file is licensed to you under your choice of the GNU Lesser + General Public License, version 3 or any later version (LGPLv3 or + later), or the GNU General Public License, version 2 (GPLv2), in all + cases as published by the Free Software Foundation. +*/ + +#ifndef _BD_H +#define _BD_H + +#ifndef _CONFIG_H +#define _CONFIG_H +#include "config.h" +#endif + +#ifdef HAVE_LIBAIO +#include <libaio.h> +#endif + +#include "xlator.h" +#include "mem-types.h" + +#define BD_XLATOR "block device mapper xlator" +#define BACKEND_VG "vg" +#define GF_XATTR "user.glusterfs" +#define BD_XATTR GF_XATTR ".bd" + +#define BD_LV "lv" +#define BD_THIN "thin" + +#define LVM_RESIZE "/sbin/lvresize" +#define LVM_CREATE "/sbin/lvcreate" +#define LVM_CONVERT "/sbin/lvconvert" + +#define VOL_TYPE "volume.type" +#define VOL_CAPS "volume.caps" + +#define ALIGN_SIZE 4096 + +#define BD_CAPS_BD 0x01 +#define BD_CAPS_THIN 0x02 +#define BD_CAPS_OFFLOAD_COPY 0x04 +#define BD_CAPS_OFFLOAD_SNAPSHOT 0x08 + +#define BD_CLONE "clone" +#define BD_SNAPSHOT "snapshot" +#define BD_MERGE "merge" +#define BD_ORIGIN "list-origin" + +#define IOV_NR 4 +#define IOV_SIZE (64 * 1024) + +#define ALIGN_SIZE 4096 + +#define LINKTO "trusted.glusterfs.dht.linkto" + +#define BD_VALIDATE_MEM_ALLOC(buff, op_errno, label) \ + if (!buff) { \ + op_errno = ENOMEM; \ + gf_log (this->name, GF_LOG_ERROR, "out of memory"); \ + goto label; \ + } + +#define BD_VALIDATE_LOCAL_OR_GOTO(local, op_errno, label) \ + if (!local) { \ + op_errno = EINVAL; \ + goto label; \ + } + +#define BD_STACK_UNWIND(typ, frame, args ...) do { \ + bd_local_t *__local = frame->local; \ + xlator_t *__this = frame->this; \ + \ + frame->local = NULL; \ + STACK_UNWIND_STRICT (typ, frame, args); \ + if (__local) \ + bd_local_free (__this, __local); \ + } while (0) + +typedef char bd_gfid_t[GF_UUID_BUF_SIZE]; + +enum gf_bd_mem_types_ { + gf_bd_private = gf_common_mt_end + 1, + gf_bd_attr, + gf_bd_fd, + gf_bd_mt_end +}; + +/** + * bd_fd - internal structure + */ +typedef struct bd_fd { + int fd; + int32_t flag; + int odirect; +} bd_fd_t; + +typedef struct bd_priv { + lvm_t handle; + char *vg; + char *pool; + int caps; + gf_boolean_t aio_init_done; + gf_boolean_t aio_capable; + gf_boolean_t aio_configured; +#ifdef HAVE_LIBAIO + io_context_t ctxp; + pthread_t aiothread; +#endif +} bd_priv_t; + + +typedef enum bd_type { + BD_TYPE_NONE, + BD_TYPE_LV, +} bd_type_t; + +typedef struct { + struct iatt iatt; + char *type; +} bd_attr_t; + +typedef enum { + BD_OF_NONE, + BD_OF_CLONE, + BD_OF_SNAPSHOT, + BD_OF_MERGE, +} bd_offload_t; + +typedef struct { + dict_t *dict; + bd_attr_t *bdatt; + inode_t *inode; + loc_t loc; + fd_t *fd; + data_t *data; /* for setxattr */ + bd_offload_t offload; + uint64_t size; + loc_t *dloc; +} bd_local_t; + +/* Prototypes */ +int bd_inode_ctx_set (inode_t *inode, xlator_t *this, bd_attr_t *ctx); +int bd_inode_ctx_get (inode_t *inode, xlator_t *this, bd_attr_t **ctx); +int bd_scan_vg (xlator_t *this, bd_priv_t *priv); +bd_local_t *bd_local_init (call_frame_t *frame, xlator_t *this); +void bd_local_free (xlator_t *this, bd_local_t *local); +int bd_fd_ctx_get (xlator_t *this, fd_t *fd, bd_fd_t **bdfd); +char *page_aligned_alloc (size_t size, char **aligned_buf); +int bd_validate_bd_xattr (xlator_t *this, char *bd, char **type, + uint64_t *lv_size, uuid_t uuid); +uint64_t bd_get_default_extent (bd_priv_t *priv); +uint64_t bd_adjust_size (bd_priv_t *priv, uint64_t size); +int bd_create (uuid_t uuid, uint64_t size, char *type, bd_priv_t *priv); +int bd_resize (bd_priv_t *priv, uuid_t uuid, off_t size); +int bd_delete_lv (bd_priv_t *priv, const char *lv_name, int *op_errno); +int bd_snapshot_create (bd_local_t *local, bd_priv_t *priv); +int bd_clone (bd_local_t *local, bd_priv_t *priv); + +int bd_merge (bd_priv_t *priv, uuid_t gfid); +int bd_get_origin (bd_priv_t *priv, loc_t *loc, fd_t *fd, dict_t *dict); +inline void bd_update_amtime(struct iatt *iatt, int flag); +int bd_snapshot_create (bd_local_t *local, bd_priv_t *priv); +int bd_clone (bd_local_t *local, bd_priv_t *priv); +int bd_merge (bd_priv_t *priv, uuid_t gfid); +int bd_get_origin (bd_priv_t *priv, loc_t *loc, fd_t *fd, dict_t *dict); + +#endif |