md

Sub-class of lu_object with methods common for "meta-data" objects in MDT stack. More...

Data Structures
struct	md_ucred
struct	md_capainfo
	there are at most 5 fids in one operation, see rename, NOTE the last one is a temporary one used for is_subdir() More...
struct	md_quota
struct	md_hsm
struct	md_som_data
struct	md_attr
struct	md_op_spec
	Additional parameters for create. More...
struct	md_object_operations
	Operations implemented for each md object (both directory and leaf). More...
struct	md_dir_operations
	Operations implemented for each directory object. More...
struct	md_device_operations
struct	md_upcall
struct	md_device
struct	md_object
struct	md_site
	md-server site. More...
struct	lu_local_obj_desc
	Structure to hold object information. More...
Defines
#define	ma_hsm_flags   ma_hsm.mh_flags
#define	HSM_FLAGS_MASK   0
#define	IOEPOCH_INVAL   0
Enumerations
enum	{ UCRED_INVALID = -1, UCRED_INIT = 0, UCRED_OLD = 1, UCRED_NEW = 2 }
enum	{ MD_CAPAINFO_MAX = 5 }
enum	ma_valid {   MA_INODE = (1 << 0), MA_LOV = (1 << 1), MA_COOKIE = (1 << 2), MA_FLAGS = (1 << 3),   MA_LMV = (1 << 4), MA_ACL_DEF = (1 << 5), MA_LOV_DEF = (1 << 6), MA_HSM = (1 << 8),   MA_SOM = (1 << 9) }
	metadata attributes
enum	mdl_mode_t {   MDL_MINMODE = 0, MDL_EX = 1, MDL_PW = 2, MDL_PR = 4,   MDL_CW = 8, MDL_CR = 16, MDL_NL = 32, MDL_GROUP = 64,   MDL_MAXMODE }
enum	mdl_type_t { MDT_NUL_LOCK = 0, MDT_REG_LOCK = (1 << 0), MDT_PDO_LOCK = (1 << 1) }
enum	md_upcall_event { MD_LOV_SYNC = (1 << 0), MD_NO_TRANS = (1 << 1), MD_LOV_CONFIG = (1 << 2), MD_LOV_QUOTA = (1 << 3) }
Functions
md_ucred *	md_ucred (const struct lu_env *env)
	Implemented in mdd/mdd_handler.c.
md_capainfo *	md_capainfo (const struct lu_env *env)
md_quota *	md_quota (const struct lu_env *env)
md_object *	llo_store_resolve (const struct lu_env *env, struct md_device *md, struct dt_device *dt, const char *path, struct lu_fid *fid)
	Resolve given path, on success function returns md object for last directory and fid points to its fid.
md_object *	llo_store_open (const struct lu_env *env, struct md_device *md, struct dt_device *dt, const char *dirname, const char *objname, struct lu_fid *fid)
	Returns md object for objname in given dirname.
md_object *	llo_store_create_index (const struct lu_env *env, struct md_device *md, struct dt_device *dt, const char *dirname, const char *objname, const struct lu_fid *fid, const struct dt_index_features *feat)
	Create md object, object could be diretcory or special index defined by feat in directory.
md_object *	llo_store_create (const struct lu_env *env, struct md_device *md, struct dt_device *dt, const char *dirname, const char *objname, const struct lu_fid *fid)
	Create md object for regular file in directory.
void	llo_local_obj_register (struct lu_local_obj_desc *)
	Register object for 'create on first mount' facility.
void	llo_local_obj_unregister (struct lu_local_obj_desc *)
int	llo_local_objects_setup (const struct lu_env *env, struct md_device *md, struct dt_device *dt)
	Created registed objects.

---

Detailed Description

Sub-class of lu_object with methods common for "meta-data" objects in MDT stack.

Meta-data objects implement namespace operations: you can link, unlink them, and treat them as directories.

Examples: mdt, cmm, and mdt are implementations of md interface.

---

Enumeration Type Documentation

enum md_upcall_event

Enumerator:

MD_LOV_SYNC	Sync the md layer.
MD_NO_TRANS	Just for split, no need trans, for replay.
MD_LOV_QUOTA	Trigger quota recovery.

---

Function Documentation

void llo_local_obj_register

(

struct lu_local_obj_desc *

llod

)

Register object for 'create on first mount' facility.

objects are created in order of registration.

struct md_object* llo_store_create	(	const struct lu_env *	env,
		struct md_device *	md,
		struct dt_device *	dt,
		const char *	dirname,
		const char *	objname,
		const struct lu_fid *	fid
	)

Create md object for regular file in directory.

Parameters:

	md	device
	dirname	parent directory
	objname	file name
	fid	object fid.

struct md_object* llo_store_create_index	(	const struct lu_env *	env,
		struct md_device *	md,
		struct dt_device *	dt,
		const char *	dirname,
		const char *	objname,
		const struct lu_fid *	fid,
		const struct dt_index_features *	feat
	)

Create md object, object could be diretcory or special index defined by feat in directory.

Parameters:

	md	device
	dirname	parent directory
	objname	file name
	fid	object fid
	feat	index features required for directory create

struct md_ucred* md_ucred

(

const struct lu_env *

env

)

Implemented in mdd/mdd_handler.c.

XXX should be moved into separate .h/.c together with all md security related definitions.

---

Contact | About Sun | News | Employment | Privacy | Terms of Use | Trademarks | (C) 2008 Sun Microsystems, Inc.