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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
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 _CLIENT_H
#define _CLIENT_H
#include <pthread.h>
#include <stdint.h>
#include "rpc-clnt.h"
#include "list.h"
#include "inode.h"
#include "client-mem-types.h"
#include "protocol-common.h"
#include "glusterfs3.h"
#include "glusterfs3-xdr.h"
#include "fd-lk.h"
#include "defaults.h"
#include "default-args.h"
#include "client-messages.h"
/* FIXME: Needs to be defined in a common file */
#define CLIENT_CMD_CONNECT "trusted.glusterfs.client-connect"
#define CLIENT_CMD_DISCONNECT "trusted.glusterfs.client-disconnect"
#define CLIENT_DUMP_LOCKS "trusted.glusterfs.clientlk-dump"
#define GF_MAX_SOCKET_WINDOW_SIZE (1 * GF_UNIT_MB)
#define GF_MIN_SOCKET_WINDOW_SIZE (0)
typedef enum {
GF_LK_HEAL_IN_PROGRESS,
GF_LK_HEAL_DONE,
} lk_heal_state_t;
typedef enum {
DEFAULT_REMOTE_FD = 0,
FALLBACK_TO_ANON_FD = 1
} clnt_remote_fd_flags_t;
#define CLIENT_POST_FOP(fop, this_rsp_u, this_args_cbk, params ...) \
do { \
gf_common_rsp *_this_rsp = &this_rsp_u->compound_rsp_u.compound_##fop##_rsp; \
int _op_ret = 0; \
int _op_errno = 0; \
\
_op_ret = _this_rsp->op_ret; \
_op_errno = gf_error_to_errno (_this_rsp->op_errno); \
args_##fop##_cbk_store (this_args_cbk, _op_ret, _op_errno, params); \
} while (0)
#define CLIENT_POST_FOP_TYPE(fop, this_rsp_u, this_args_cbk, params ...) \
do { \
gfs3_##fop##_rsp *_this_rsp = &this_rsp_u->compound_rsp_u.compound_##fop##_rsp; \
int _op_ret = 0; \
int _op_errno = 0; \
\
_op_ret = _this_rsp->op_ret; \
_op_errno = gf_error_to_errno (_this_rsp->op_errno); \
args_##fop##_cbk_store (this_args_cbk, _op_ret, _op_errno, params); \
} while (0)
#define CLIENT_PRE_FOP(fop, xl, compound_req, op_errno, label, params ...) \
do { \
gfs3_##fop##_req *_req = (gfs3_##fop##_req *) compound_req; \
int _ret = 0; \
\
_ret = client_pre_##fop (xl, _req, params); \
if (_ret < 0) { \
op_errno = -ret; \
goto label; \
} \
} while (0)
#define CLIENT_COMPOUND_FOP_CLEANUP(curr_req, fop) \
do { \
gfs3_##fop##_req *_req = &curr_req->compound_req_u.compound_##fop##_req;\
\
GF_FREE (_req->xdata.xdata_val); \
} while (0)
#define CLIENT_GET_REMOTE_FD(xl, fd, flags, remote_fd, op_errno, label) \
do { \
int _ret = 0; \
_ret = client_get_remote_fd (xl, fd, flags, &remote_fd);\
if (_ret < 0) { \
op_errno = errno; \
goto label; \
} \
if (remote_fd == -1) { \
gf_msg (xl->name, GF_LOG_WARNING, EBADFD, \
PC_MSG_BAD_FD, " (%s) " \
"remote_fd is -1. EBADFD", \
uuid_utoa (fd->inode->gfid)); \
op_errno = EBADFD; \
goto label; \
} \
} while (0)
#define CLIENT_STACK_UNWIND(op, frame, params ...) do { \
if (!frame) \
break; \
clnt_local_t *__local = frame->local; \
frame->local = NULL; \
STACK_UNWIND_STRICT (op, frame, params); \
client_local_wipe (__local); \
} while (0)
struct clnt_options {
char *remote_subvolume;
int ping_timeout;
};
typedef struct clnt_conf {
struct rpc_clnt *rpc;
struct clnt_options opt;
struct rpc_clnt_config rpc_conf;
struct list_head saved_fds;
pthread_mutex_t lock;
int connecting;
int connected;
rpc_clnt_prog_t *fops;
rpc_clnt_prog_t *mgmt;
rpc_clnt_prog_t *handshake;
rpc_clnt_prog_t *dump;
int client_id;
uint64_t reopen_fd_count; /* Count of fds reopened after a
connection is established */
gf_lock_t rec_lock;
int skip_notify;
int last_sent_event; /* Flag used to make sure we are
not repeating the same event
which was sent earlier */
char portmap_err_logged; /* flag used to prevent
excessive logging */
char disconnect_err_logged; /* flag used to prevent
excessive disconnect
logging */
gf_boolean_t lk_heal;
uint16_t lk_version; /* this variable is used to distinguish
client-server transaction while
performing lock healing */
uint32_t grace_timeout;
gf_timer_t *grace_timer;
gf_boolean_t grace_timer_needed; /* The state of this flag will
be used to decide whether
a new grace-timer must be
registered or not. False
means dont register, true
means register */
char parent_down;
gf_boolean_t quick_reconnect; /* When reconnecting after
portmap query, do not let
the reconnection happen after
the usual 3-second wait
*/
gf_boolean_t filter_o_direct; /* if set, filter O_DIRECT from
the flags list of open() */
/* set volume is the op which results in creating/re-using
* the conn-id and is called once per connection, this remembers
* how manytimes set_volume is called
*/
uint64_t setvol_count;
gf_boolean_t send_gids; /* let the server resolve gids */
int event_threads; /* # of event threads
* configured */
gf_boolean_t destroy; /* if enabled implies fini was called
* on @this xlator instance */
gf_boolean_t child_up; /* Set to true, when child is up, and
* false, when child is down */
} clnt_conf_t;
typedef struct _client_fd_ctx {
struct list_head sfd_pos; /* Stores the reference to this
fd's position in the saved_fds list.
*/
int64_t remote_fd;
char is_dir;
char released;
int32_t flags;
fd_lk_ctx_t *lk_ctx;
pthread_mutex_t mutex;
lk_heal_state_t lk_heal_state;
uuid_t gfid;
void (*reopen_done) (struct _client_fd_ctx*, xlator_t *);
struct list_head lock_list; /* List of all granted locks on this fd */
int32_t reopen_attempts;
} clnt_fd_ctx_t;
typedef struct _client_posix_lock {
fd_t *fd; /* The fd on which the lk operation was made */
struct gf_flock user_flock; /* the flock supplied by the user */
off_t fl_start;
off_t fl_end;
short fl_type;
int32_t cmd; /* the cmd for the lock call */
gf_lkowner_t owner; /* lock owner from fuse */
struct list_head list; /* reference used to add to the fdctx list of locks */
} client_posix_lock_t;
typedef struct client_local {
loc_t loc;
loc_t loc2;
fd_t *fd;
clnt_fd_ctx_t *fdctx;
uint32_t flags;
struct iobref *iobref;
client_posix_lock_t *client_lock;
gf_lkowner_t owner;
int32_t cmd;
struct list_head lock_list;
pthread_mutex_t mutex;
char *name;
gf_boolean_t attempt_reopen;
/* required for compound fops */
struct iobref *iobref2;
compound_args_t *compound_args;
unsigned int length; /* length of a compound fop */
unsigned int read_length; /* defines the last processed length for a compound read */
} clnt_local_t;
typedef struct client_args {
loc_t *loc;
fd_t *fd;
const char *linkname;
struct iobref *iobref;
struct iovec *vector;
dict_t *xattr;
struct iatt *stbuf;
loc_t *oldloc;
loc_t *newloc;
const char *name;
struct gf_flock *flock;
const char *volume;
const char *basename;
off_t offset;
int32_t mask;
int32_t cmd;
size_t size;
mode_t mode;
dev_t rdev;
int32_t flags;
int32_t count;
int32_t datasync;
entrylk_cmd cmd_entrylk;
entrylk_type type;
gf_xattrop_flags_t optype;
int32_t valid;
int32_t len;
gf_seek_what_t what;
struct gf_lease *lease;
mode_t umask;
dict_t *xdata;
} clnt_args_t;
typedef ssize_t (*gfs_serialize_t) (struct iovec outmsg, void *args);
clnt_fd_ctx_t *this_fd_get_ctx (fd_t *file, xlator_t *this);
clnt_fd_ctx_t *this_fd_del_ctx (fd_t *file, xlator_t *this);
void this_fd_set_ctx (fd_t *file, xlator_t *this, loc_t *loc,
clnt_fd_ctx_t *ctx);
int client_local_wipe (clnt_local_t *local);
int client_submit_request (xlator_t *this, void *req,
call_frame_t *frame, rpc_clnt_prog_t *prog,
int procnum, fop_cbk_fn_t cbk,
struct iobref *iobref,
struct iovec *rsphdr, int rsphdr_count,
struct iovec *rsp_payload, int rsp_count,
struct iobref *rsp_iobref, xdrproc_t xdrproc);
int
client_submit_compound_request (xlator_t *this, void *req, call_frame_t *frame,
rpc_clnt_prog_t *prog, int procnum, fop_cbk_fn_t cbkfn,
struct iovec *req_vector, int req_count,
struct iobref *iobref, struct iovec *rsphdr,
int rsphdr_count, struct iovec *rsp_payload,
int rsp_payload_count, struct iobref *rsp_iobref,
xdrproc_t xdrproc);
int unserialize_rsp_dirent (xlator_t *this, struct gfs3_readdir_rsp *rsp,
gf_dirent_t *entries);
int unserialize_rsp_direntp (xlator_t *this, fd_t *fd,
struct gfs3_readdirp_rsp *rsp, gf_dirent_t *entries);
int clnt_readdir_rsp_cleanup (gfs3_readdir_rsp *rsp);
int clnt_readdirp_rsp_cleanup (gfs3_readdirp_rsp *rsp);
int client_attempt_lock_recovery (xlator_t *this, clnt_fd_ctx_t *fdctx);
int32_t delete_granted_locks_owner (fd_t *fd, gf_lkowner_t *owner);
int client_add_lock_for_recovery (fd_t *fd, struct gf_flock *flock,
gf_lkowner_t *owner, int32_t cmd);
int32_t delete_granted_locks_fd (clnt_fd_ctx_t *fdctx);
int32_t client_cmd_to_gf_cmd (int32_t cmd, int32_t *gf_cmd);
void client_save_number_fds (clnt_conf_t *conf, int count);
int dump_client_locks (inode_t *inode);
int client_notify_parents_child_up (xlator_t *this);
int32_t is_client_dump_locks_cmd (char *name);
int32_t client_dump_locks (char *name, inode_t *inode,
dict_t *dict);
int client_fdctx_destroy (xlator_t *this, clnt_fd_ctx_t *fdctx);
uint32_t client_get_lk_ver (clnt_conf_t *conf);
int32_t client_type_to_gf_type (short l_type);
int client_mark_fd_bad (xlator_t *this);
int client_set_lk_version (xlator_t *this);
int client_fd_lk_list_empty (fd_lk_ctx_t *lk_ctx, gf_boolean_t use_try_lock);
void client_default_reopen_done (clnt_fd_ctx_t *fdctx, xlator_t *this);
void client_attempt_reopen (fd_t *fd, xlator_t *this);
int client_get_remote_fd (xlator_t *this, fd_t *fd, int flags,
int64_t *remote_fd);
int client_fd_fop_prepare_local (call_frame_t *frame, fd_t *fd,
int64_t remote_fd);
gf_boolean_t
__is_fd_reopen_in_progress (clnt_fd_ctx_t *fdctx);
int
client_notify_dispatch (xlator_t *this, int32_t event, void *data, ...);
int
client_notify_dispatch_uniq (xlator_t *this, int32_t event, void *data, ...);
gf_boolean_t
client_is_reopen_needed (fd_t *fd, xlator_t *this, int64_t remote_fd);
int
client_add_fd_to_saved_fds (xlator_t *this, fd_t *fd, loc_t *loc, int32_t flags,
int64_t remote_fd, int is_dir);
int
client_handle_fop_requirements (xlator_t *this, call_frame_t *frame,
gfs3_compound_req *req,
clnt_local_t *local,
struct iobref *req_iobref,
struct iobref *rsp_iobref,
struct iovec *req_vector,
struct iovec *rsp_vector, int *req_count,
int *rsp_count, default_args_t *args,
int fop_enum, int index);
int
client_process_response (call_frame_t *frame, xlator_t *this,
struct rpc_req *req,
gfs3_compound_rsp *rsp, compound_args_cbk_t *args_cbk,
int index);
void
compound_request_cleanup (gfs3_compound_req *req);
#endif /* !_CLIENT_H */
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