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Commit f7ab093f authored by Mike Marshall's avatar Mike Marshall
Browse files

Orangefs: kernel client part 1 



OrangeFS (formerly PVFS) is an lgpl licensed userspace networked parallel
file system. OrangeFS can be accessed through included system utilities,
user integration libraries, MPI-IO and can be used by the Hadoop
ecosystem as an alternative to the HDFS filesystem. OrangeFS is used
widely for parallel science, data analytics and engineering applications.

While applications often don't require Orangefs to be mounted into
the VFS, users do like to be able to access their files in the normal way.
The Orangefs kernel client allows Orangefs filesystems to be mounted as
a VFS. The kernel client communicates with a userspace daemon which in
turn communicates with the Orangefs server daemons that implement the
filesystem. The server daemons (there's almost always more than one)
need not be running on the same host as the kernel client.

Orangefs filesystems can also be mounted with FUSE, and we
ship code and instructions to facilitate that, but most of our users
report preferring to use our kernel module instead. Further, as an example
of a problem we can't solve with fuse, we have in the works a
not-yet-ready-for-prime-time version of a file_operations lock function
that accounts for the server daemons being distributed across more
than one running kernel.

Many people and organizations, including Clemson University,
Argonne National Laboratories and Acxiom Corporation have
helped to create what has become Orangefs over more than twenty
years. Some of the more recent contributors to the kernel client
include:

  Mike Marshall
  Christoph Hellwig
  Randy Martin
  Becky Ligon
  Walt Ligon
  Michael Moore
  Rob Ross
  Phil Carnes

Signed-off-by: default avatarMike Marshall <hubcap@omnibond.com>
parent 9ffecb10

fs/orangefs/downcall.h

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/*

 * (C) 2001 Clemson University and The University of Chicago

 *

 * See COPYING in top-level directory.

 */



/*

 *  Definitions of downcalls used in Linux kernel module.

 */



#ifndef __DOWNCALL_H

#define __DOWNCALL_H



/*

 * Sanitized the device-client core interaction

 * for clean 32-64 bit usage

 */

struct pvfs2_io_response {

	__s64 amt_complete;

};



struct pvfs2_iox_response {

	__s64 amt_complete;

};



struct pvfs2_lookup_response {

	struct pvfs2_object_kref refn;

};



struct pvfs2_create_response {

	struct pvfs2_object_kref refn;

};



struct pvfs2_symlink_response {

	struct pvfs2_object_kref refn;

};



struct pvfs2_getattr_response {

	struct PVFS_sys_attr_s attributes;

	char link_target[PVFS2_NAME_LEN];

};



struct pvfs2_mkdir_response {

	struct pvfs2_object_kref refn;

};



/*

 * duplication of some system interface structures so that I don't have

 * to allocate extra memory

 */

struct pvfs2_dirent {

	char *d_name;

	int d_length;

	struct pvfs2_khandle khandle;

};



struct pvfs2_statfs_response {

	__s64 block_size;

	__s64 blocks_total;

	__s64 blocks_avail;

	__s64 files_total;

	__s64 files_avail;

};



struct pvfs2_fs_mount_response {

	__s32 fs_id;

	__s32 id;

	struct pvfs2_khandle root_khandle;

};



/* the getxattr response is the attribute value */

struct pvfs2_getxattr_response {

	__s32 val_sz;

	__s32 __pad1;

	char val[PVFS_MAX_XATTR_VALUELEN];

};



/* the listxattr response is an array of attribute names */

struct pvfs2_listxattr_response {

	__s32 returned_count;

	__s32 __pad1;

	__u64 token;

	char key[PVFS_MAX_XATTR_LISTLEN * PVFS_MAX_XATTR_NAMELEN];

	__s32 keylen;

	__s32 __pad2;

	__s32 lengths[PVFS_MAX_XATTR_LISTLEN];

};



struct pvfs2_param_response {

	__s64 value;

};



#define PERF_COUNT_BUF_SIZE 4096

struct pvfs2_perf_count_response {

	char buffer[PERF_COUNT_BUF_SIZE];

};



#define FS_KEY_BUF_SIZE 4096

struct pvfs2_fs_key_response {

	__s32 fs_keylen;

	__s32 __pad1;

	char fs_key[FS_KEY_BUF_SIZE];

};



struct pvfs2_downcall_s {

	__s32 type;

	__s32 status;

	/* currently trailer is used only by readdir */

	__s64 trailer_size;

	char * trailer_buf;



	union {

		struct pvfs2_io_response io;

		struct pvfs2_iox_response iox;

		struct pvfs2_lookup_response lookup;

		struct pvfs2_create_response create;

		struct pvfs2_symlink_response sym;

		struct pvfs2_getattr_response getattr;

		struct pvfs2_mkdir_response mkdir;

		struct pvfs2_statfs_response statfs;

		struct pvfs2_fs_mount_response fs_mount;

		struct pvfs2_getxattr_response getxattr;

		struct pvfs2_listxattr_response listxattr;

		struct pvfs2_param_response param;

		struct pvfs2_perf_count_response perf_count;

		struct pvfs2_fs_key_response fs_key;

	} resp;

};



struct pvfs2_readdir_response_s {

	__u64 token;

	__u64 directory_version;

	__u32 __pad2;

	__u32 pvfs_dirent_outcount;

	struct pvfs2_dirent *dirent_array;

};



#endif /* __DOWNCALL_H */

fs/orangefs/protocol.h

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fs/orangefs/pvfs2-bufmap.h

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/*

 * (C) 2001 Clemson University and The University of Chicago

 *

 * See COPYING in top-level directory.

 */



#ifndef __PVFS2_BUFMAP_H

#define __PVFS2_BUFMAP_H



/* used to describe mapped buffers */

struct pvfs_bufmap_desc {

	void *uaddr;			/* user space address pointer */

	struct page **page_array;	/* array of mapped pages */

	int array_count;		/* size of above arrays */

	struct list_head list_link;

};



struct pvfs2_bufmap;



struct pvfs2_bufmap *pvfs2_bufmap_ref(void);

void pvfs2_bufmap_unref(struct pvfs2_bufmap *bufmap);



/*

 * pvfs_bufmap_size_query is now an inline function because buffer

 * sizes are not hardcoded

 */

int pvfs_bufmap_size_query(void);



int pvfs_bufmap_shift_query(void);



int pvfs_bufmap_initialize(struct PVFS_dev_map_desc *user_desc);



int get_bufmap_init(void);



void pvfs_bufmap_finalize(void);



int pvfs_bufmap_get(struct pvfs2_bufmap **mapp, int *buffer_index);



void pvfs_bufmap_put(struct pvfs2_bufmap *bufmap, int buffer_index);



int readdir_index_get(struct pvfs2_bufmap **mapp, int *buffer_index);



void readdir_index_put(struct pvfs2_bufmap *bufmap, int buffer_index);



int pvfs_bufmap_copy_iovec_from_user(struct pvfs2_bufmap *bufmap,

				     int buffer_index,

				     const struct iovec *iov,

				     unsigned long nr_segs,

				     size_t size);



int pvfs_bufmap_copy_iovec_from_kernel(struct pvfs2_bufmap *bufmap,

				       int buffer_index,

				       const struct iovec *iov,

				       unsigned long nr_segs,

				       size_t size);



int pvfs_bufmap_copy_to_user_iovec(struct pvfs2_bufmap *bufmap,

				   int buffer_index,

				   const struct iovec *iov,

				   unsigned long nr_segs,

				   size_t size);



int pvfs_bufmap_copy_to_kernel_iovec(struct pvfs2_bufmap *bufmap,

				     int buffer_index,

				     const struct iovec *iov,

				     unsigned long nr_segs,

				     size_t size);



size_t pvfs_bufmap_copy_to_user_task_iovec(struct task_struct *tsk,

					   struct iovec *iovec,

					   unsigned long nr_segs,

					   struct pvfs2_bufmap *bufmap,

					   int buffer_index,

					   size_t bytes_to_be_copied);



#endif /* __PVFS2_BUFMAP_H */

fs/orangefs/pvfs2-debug.h

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/*

 * (C) 2001 Clemson University and The University of Chicago

 *

 * See COPYING in top-level directory.

 */



/* This file just defines debugging masks to be used with the gossip

 * logging utility.  All debugging masks for PVFS2 are kept here to make

 * sure we don't have collisions.

 */



#ifndef __PVFS2_DEBUG_H

#define __PVFS2_DEBUG_H



#ifdef __KERNEL__

#include <linux/types.h>

#else

#include <stdint.h>

#endif



#define GOSSIP_NO_DEBUG                (__u64)0

#define GOSSIP_BMI_DEBUG_TCP           ((__u64)1 << 0)

#define GOSSIP_BMI_DEBUG_CONTROL       ((__u64)1 << 1)

#define GOSSIP_BMI_DEBUG_OFFSETS       ((__u64)1 << 2)

#define GOSSIP_BMI_DEBUG_GM            ((__u64)1 << 3)

#define GOSSIP_JOB_DEBUG               ((__u64)1 << 4)

#define GOSSIP_SERVER_DEBUG            ((__u64)1 << 5)

#define GOSSIP_STO_DEBUG_CTRL          ((__u64)1 << 6)

#define GOSSIP_STO_DEBUG_DEFAULT       ((__u64)1 << 7)

#define GOSSIP_FLOW_DEBUG              ((__u64)1 << 8)

#define GOSSIP_BMI_DEBUG_GM_MEM        ((__u64)1 << 9)

#define GOSSIP_REQUEST_DEBUG           ((__u64)1 << 10)

#define GOSSIP_FLOW_PROTO_DEBUG        ((__u64)1 << 11)

#define GOSSIP_NCACHE_DEBUG            ((__u64)1 << 12)

#define GOSSIP_CLIENT_DEBUG            ((__u64)1 << 13)

#define GOSSIP_REQ_SCHED_DEBUG         ((__u64)1 << 14)

#define GOSSIP_ACACHE_DEBUG            ((__u64)1 << 15)

#define GOSSIP_TROVE_DEBUG             ((__u64)1 << 16)

#define GOSSIP_TROVE_OP_DEBUG          ((__u64)1 << 17)

#define GOSSIP_DIST_DEBUG              ((__u64)1 << 18)

#define GOSSIP_BMI_DEBUG_IB            ((__u64)1 << 19)

#define GOSSIP_DBPF_ATTRCACHE_DEBUG    ((__u64)1 << 20)

#define GOSSIP_MMAP_RCACHE_DEBUG       ((__u64)1 << 21)

#define GOSSIP_LOOKUP_DEBUG            ((__u64)1 << 22)

#define GOSSIP_REMOVE_DEBUG            ((__u64)1 << 23)

#define GOSSIP_GETATTR_DEBUG           ((__u64)1 << 24)

#define GOSSIP_READDIR_DEBUG           ((__u64)1 << 25)

#define GOSSIP_IO_DEBUG                ((__u64)1 << 26)

#define GOSSIP_DBPF_OPEN_CACHE_DEBUG   ((__u64)1 << 27)

#define GOSSIP_PERMISSIONS_DEBUG       ((__u64)1 << 28)

#define GOSSIP_CANCEL_DEBUG            ((__u64)1 << 29)

#define GOSSIP_MSGPAIR_DEBUG           ((__u64)1 << 30)

#define GOSSIP_CLIENTCORE_DEBUG        ((__u64)1 << 31)

#define GOSSIP_CLIENTCORE_TIMING_DEBUG ((__u64)1 << 32)

#define GOSSIP_SETATTR_DEBUG           ((__u64)1 << 33)

#define GOSSIP_MKDIR_DEBUG             ((__u64)1 << 34)

#define GOSSIP_VARSTRIP_DEBUG          ((__u64)1 << 35)

#define GOSSIP_GETEATTR_DEBUG          ((__u64)1 << 36)

#define GOSSIP_SETEATTR_DEBUG          ((__u64)1 << 37)

#define GOSSIP_ENDECODE_DEBUG          ((__u64)1 << 38)

#define GOSSIP_DELEATTR_DEBUG          ((__u64)1 << 39)

#define GOSSIP_ACCESS_DEBUG            ((__u64)1 << 40)

#define GOSSIP_ACCESS_DETAIL_DEBUG     ((__u64)1 << 41)

#define GOSSIP_LISTEATTR_DEBUG         ((__u64)1 << 42)

#define GOSSIP_PERFCOUNTER_DEBUG       ((__u64)1 << 43)

#define GOSSIP_STATE_MACHINE_DEBUG     ((__u64)1 << 44)

#define GOSSIP_DBPF_KEYVAL_DEBUG       ((__u64)1 << 45)

#define GOSSIP_LISTATTR_DEBUG          ((__u64)1 << 46)

#define GOSSIP_DBPF_COALESCE_DEBUG     ((__u64)1 << 47)

#define GOSSIP_ACCESS_HOSTNAMES        ((__u64)1 << 48)

#define GOSSIP_FSCK_DEBUG              ((__u64)1 << 49)

#define GOSSIP_BMI_DEBUG_MX            ((__u64)1 << 50)

#define GOSSIP_BSTREAM_DEBUG           ((__u64)1 << 51)

#define GOSSIP_BMI_DEBUG_PORTALS       ((__u64)1 << 52)

#define GOSSIP_USER_DEV_DEBUG          ((__u64)1 << 53)

#define GOSSIP_DIRECTIO_DEBUG          ((__u64)1 << 54)

#define GOSSIP_MGMT_DEBUG              ((__u64)1 << 55)

#define GOSSIP_MIRROR_DEBUG            ((__u64)1 << 56)

#define GOSSIP_WIN_CLIENT_DEBUG        ((__u64)1 << 57)

#define GOSSIP_SECURITY_DEBUG          ((__u64)1 << 58)

#define GOSSIP_USRINT_DEBUG            ((__u64)1 << 59)

#define GOSSIP_RCACHE_DEBUG            ((__u64)1 << 60)

#define GOSSIP_SECCACHE_DEBUG          ((__u64)1 << 61)



#define GOSSIP_BMI_DEBUG_ALL ((__u64) (GOSSIP_BMI_DEBUG_TCP +	\

					 GOSSIP_BMI_DEBUG_CONTROL +	\

					 GOSSIP_BMI_DEBUG_GM +		\

					 GOSSIP_BMI_DEBUG_OFFSETS +	\

					 GOSSIP_BMI_DEBUG_IB +		\

					 GOSSIP_BMI_DEBUG_MX +		\

					 GOSSIP_BMI_DEBUG_PORTALS))



const char *PVFS_debug_get_next_debug_keyword(int position);



#define GOSSIP_SUPER_DEBUG		((__u64)1 << 0)

#define GOSSIP_INODE_DEBUG		((__u64)1 << 1)

#define GOSSIP_FILE_DEBUG		((__u64)1 << 2)

#define GOSSIP_DIR_DEBUG		((__u64)1 << 3)

#define GOSSIP_UTILS_DEBUG		((__u64)1 << 4)

#define GOSSIP_WAIT_DEBUG		((__u64)1 << 5)

#define GOSSIP_ACL_DEBUG		((__u64)1 << 6)

#define GOSSIP_DCACHE_DEBUG		((__u64)1 << 7)

#define GOSSIP_DEV_DEBUG		((__u64)1 << 8)

#define GOSSIP_NAME_DEBUG		((__u64)1 << 9)

#define GOSSIP_BUFMAP_DEBUG		((__u64)1 << 10)

#define GOSSIP_CACHE_DEBUG		((__u64)1 << 11)

#define GOSSIP_DEBUGFS_DEBUG		((__u64)1 << 12)

#define GOSSIP_XATTR_DEBUG		((__u64)1 << 13)

#define GOSSIP_INIT_DEBUG		((__u64)1 << 14)

#define GOSSIP_SYSFS_DEBUG		((__u64)1 << 15)



#define GOSSIP_MAX_NR                 16

#define GOSSIP_MAX_DEBUG              (((__u64)1 << GOSSIP_MAX_NR) - 1)



/*function prototypes*/

__u64 PVFS_kmod_eventlog_to_mask(const char *event_logging);

__u64 PVFS_debug_eventlog_to_mask(const char *event_logging);

char *PVFS_debug_mask_to_eventlog(__u64 mask);

char *PVFS_kmod_mask_to_eventlog(__u64 mask);



/* a private internal type */

struct __keyword_mask_s {

	const char *keyword;

	__u64 mask_val;

};



#define __DEBUG_ALL ((__u64) -1)



/* map all config keywords to pvfs2 debug masks here */

static struct __keyword_mask_s s_keyword_mask_map[] = {

	/* Log trove debugging info.  Same as 'trove'. */

	{"storage", GOSSIP_TROVE_DEBUG},

	/* Log trove debugging info.  Same as 'storage'. */

	{"trove", GOSSIP_TROVE_DEBUG},

	/* Log trove operations. */

	{"trove_op", GOSSIP_TROVE_OP_DEBUG},

	/* Log network debug info. */

	{"network", GOSSIP_BMI_DEBUG_ALL},

	/* Log server info, including new operations. */

	{"server", GOSSIP_SERVER_DEBUG},

	/* Log client sysint info.  This is only useful for the client. */

	{"client", GOSSIP_CLIENT_DEBUG},

	/* Debug the varstrip distribution */

	{"varstrip", GOSSIP_VARSTRIP_DEBUG},

	/* Log job info */

	{"job", GOSSIP_JOB_DEBUG},

	/* Debug PINT_process_request calls.  EXTREMELY verbose! */

	{"request", GOSSIP_REQUEST_DEBUG},

	/* Log request scheduler events */

	{"reqsched", GOSSIP_REQ_SCHED_DEBUG},

	/* Log the flow protocol events, including flowproto_multiqueue */

	{"flowproto", GOSSIP_FLOW_PROTO_DEBUG},

	/* Log flow calls */

	{"flow", GOSSIP_FLOW_DEBUG},

	/* Debug the client name cache.  Only useful on the client. */

	{"ncache", GOSSIP_NCACHE_DEBUG},

	/* Debug read-ahead cache events.  Only useful on the client. */

	{"mmaprcache", GOSSIP_MMAP_RCACHE_DEBUG},

	/* Debug the attribute cache.  Only useful on the client. */

	{"acache", GOSSIP_ACACHE_DEBUG},

	/* Log/Debug distribution calls */

	{"distribution", GOSSIP_DIST_DEBUG},

	/* Debug the server-side dbpf attribute cache */

	{"dbpfattrcache", GOSSIP_DBPF_ATTRCACHE_DEBUG},

	/* Debug the client lookup state machine. */

	{"lookup", GOSSIP_LOOKUP_DEBUG},

	/* Debug the client remove state macine. */

	{"remove", GOSSIP_REMOVE_DEBUG},

	/* Debug the server getattr state machine. */

	{"getattr", GOSSIP_GETATTR_DEBUG},

	/* Debug the server setattr state machine. */

	{"setattr", GOSSIP_SETATTR_DEBUG},

	/* vectored getattr server state machine */

	{"listattr", GOSSIP_LISTATTR_DEBUG},

	/* Debug the client and server get ext attributes SM. */

	{"geteattr", GOSSIP_GETEATTR_DEBUG},

	/* Debug the client and server set ext attributes SM. */

	{"seteattr", GOSSIP_SETEATTR_DEBUG},

	/* Debug the readdir operation (client and server) */

	{"readdir", GOSSIP_READDIR_DEBUG},

	/* Debug the mkdir operation (server only) */

	{"mkdir", GOSSIP_MKDIR_DEBUG},

	/* Debug the io operation (reads and writes)

	 * for both the client and server */

	{"io", GOSSIP_IO_DEBUG},

	/* Debug the server's open file descriptor cache */

	{"open_cache", GOSSIP_DBPF_OPEN_CACHE_DEBUG},

	/* Debug permissions checking on the server */

	{"permissions", GOSSIP_PERMISSIONS_DEBUG},

	/* Debug the cancel operation */

	{"cancel", GOSSIP_CANCEL_DEBUG},

	/* Debug the msgpair state machine */

	{"msgpair", GOSSIP_MSGPAIR_DEBUG},

	/* Debug the client core app */

	{"clientcore", GOSSIP_CLIENTCORE_DEBUG},

	/* Debug the client timing state machines (job timeout, etc.) */

	{"clientcore_timing", GOSSIP_CLIENTCORE_TIMING_DEBUG},

	/* network encoding */

	{"endecode", GOSSIP_ENDECODE_DEBUG},

	/* Show server file (metadata) accesses (both modify and read-only). */

	{"access", GOSSIP_ACCESS_DEBUG},

	/* Show more detailed server file accesses */

	{"access_detail", GOSSIP_ACCESS_DETAIL_DEBUG},

	/* Debug the listeattr operation */

	{"listeattr", GOSSIP_LISTEATTR_DEBUG},

	/* Debug the state machine management code */

	{"sm", GOSSIP_STATE_MACHINE_DEBUG},

	/* Debug the metadata dbpf keyval functions */

	{"keyval", GOSSIP_DBPF_KEYVAL_DEBUG},

	/* Debug the metadata sync coalescing code */

	{"coalesce", GOSSIP_DBPF_COALESCE_DEBUG},

	/* Display the hostnames instead of IP addrs in debug output */

	{"access_hostnames", GOSSIP_ACCESS_HOSTNAMES},

	/* Show the client device events */

	{"user_dev", GOSSIP_USER_DEV_DEBUG},

	/* Debug the fsck tool */

	{"fsck", GOSSIP_FSCK_DEBUG},

	/* Debug the bstream code */

	{"bstream", GOSSIP_BSTREAM_DEBUG},

	/* Debug trove in direct io mode */

	{"directio", GOSSIP_DIRECTIO_DEBUG},

	/* Debug direct io thread management */

	{"mgmt", GOSSIP_MGMT_DEBUG},

	/* Debug mirroring process */

	{"mirror", GOSSIP_MIRROR_DEBUG},

	/* Windows client */

	{"win_client", GOSSIP_WIN_CLIENT_DEBUG},

	/* Debug robust security code */

	{"security", GOSSIP_SECURITY_DEBUG},

	/* Capability Cache */

	{"seccache", GOSSIP_SECCACHE_DEBUG},

	/* Client User Interface */

	{"usrint", GOSSIP_USRINT_DEBUG},

	/* rcache */

	{"rcache", GOSSIP_RCACHE_DEBUG},

	/* Everything except the periodic events.  Useful for debugging */

	{"verbose",

	 (__DEBUG_ALL &

	  ~(GOSSIP_PERFCOUNTER_DEBUG | GOSSIP_STATE_MACHINE_DEBUG |

	    GOSSIP_ENDECODE_DEBUG | GOSSIP_USER_DEV_DEBUG))

	 },

	/* No debug output */

	{"none", GOSSIP_NO_DEBUG},

	/* Everything */

	{"all", __DEBUG_ALL}

};



#undef __DEBUG_ALL



/*

 * Map all kmod keywords to kmod debug masks here. Keep this

 * structure "packed":

 *

 *   "all" is always last...

 *

 *   keyword     mask_val     index

 *     foo          1           0

 *     bar          2           1

 *     baz          4           2

 *     qux          8           3

 *      .           .           .

 */

static struct __keyword_mask_s s_kmod_keyword_mask_map[] = {

	{"super", GOSSIP_SUPER_DEBUG},

	{"inode", GOSSIP_INODE_DEBUG},

	{"file", GOSSIP_FILE_DEBUG},

	{"dir", GOSSIP_DIR_DEBUG},

	{"utils", GOSSIP_UTILS_DEBUG},

	{"wait", GOSSIP_WAIT_DEBUG},

	{"acl", GOSSIP_ACL_DEBUG},

	{"dcache", GOSSIP_DCACHE_DEBUG},

	{"dev", GOSSIP_DEV_DEBUG},

	{"name", GOSSIP_NAME_DEBUG},

	{"bufmap", GOSSIP_BUFMAP_DEBUG},

	{"cache", GOSSIP_CACHE_DEBUG},

	{"debugfs", GOSSIP_DEBUGFS_DEBUG},

	{"xattr", GOSSIP_XATTR_DEBUG},

	{"init", GOSSIP_INIT_DEBUG},

	{"sysfs", GOSSIP_SYSFS_DEBUG},

	{"none", GOSSIP_NO_DEBUG},

	{"all", GOSSIP_MAX_DEBUG}

};



static const int num_kmod_keyword_mask_map = (int)

	(sizeof(s_kmod_keyword_mask_map) / sizeof(struct __keyword_mask_s));



static const int num_keyword_mask_map = (int)

	(sizeof(s_keyword_mask_map) / sizeof(struct __keyword_mask_s));



#endif /* __PVFS2_DEBUG_H */

fs/orangefs/pvfs2-debugfs.h

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int pvfs2_debugfs_init(void);

int pvfs2_kernel_debug_init(void);

void pvfs2_debugfs_cleanup(void);