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/*
Copyright (c) 2006-2011 Gluster, Inc. <http://www.gluster.com>
This file is part of GlusterFS.
GlusterFS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.
GlusterFS is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
#ifndef _GF_FUSE_BRIDGE_H_
#define _GF_FUSE_BRIDGE_H_
#include <stdint.h>
#include <signal.h>
#include <pthread.h>
#include <stddef.h>
#include <dirent.h>
#include <sys/mount.h>
#include <sys/time.h>
#include <fnmatch.h>
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif /* _CONFIG_H */
#include "glusterfs.h"
#include "logging.h"
#include "xlator.h"
#include "defaults.h"
#include "common-utils.h"
#include "statedump.h"
#ifdef GF_DARWIN_HOST_OS
/* This is MacFUSE's marker for MacFUSE-specific code */
#define __FreeBSD__ 10
#include "fuse_kernel_macfuse.h"
#else
#include "fuse_kernel.h"
#endif
#include "fuse-misc.h"
#include "fuse-mount.h"
#include "fuse-mem-types.h"
#include "list.h"
#include "dict.h"
#include "syncop.h"
#if defined(GF_LINUX_HOST_OS) || defined(__NetBSD__)
#define FUSE_OP_HIGH (FUSE_POLL + 1)
#endif
#ifdef GF_DARWIN_HOST_OS
#define FUSE_OP_HIGH (FUSE_DESTROY + 1)
#endif
#define GLUSTERFS_XATTR_LEN_MAX 65536
#define MAX_FUSE_PROC_DELAY 1
typedef struct fuse_in_header fuse_in_header_t;
typedef void (fuse_handler_t) (xlator_t *this, fuse_in_header_t *finh,
void *msg);
struct fuse_private {
int fd;
uint32_t proto_minor;
char *volfile;
size_t volfile_size;
char *mount_point;
struct iobuf *iobuf;
pthread_t fuse_thread;
char fuse_thread_started;
uint32_t direct_io_mode;
size_t *msg0_len_p;
double entry_timeout;
double attribute_timeout;
pthread_cond_t sync_cond;
pthread_mutex_t sync_mutex;
char event_recvd;
char init_recvd;
gf_boolean_t strict_volfile_check;
fuse_handler_t **fuse_ops;
fuse_handler_t **fuse_ops0;
pthread_mutex_t fuse_dump_mutex;
int fuse_dump_fd;
glusterfs_graph_t *next_graph;
xlator_t *active_subvol;
pid_t client_pid;
gf_boolean_t client_pid_set;
unsigned uid_map_root;
gf_boolean_t acl;
gf_boolean_t selinux;
gf_boolean_t read_only;
fdtable_t *fdtable;
/* For fuse-reverse-validation */
int revchan_in;
int revchan_out;
gf_boolean_t reverse_fuse_thread_started;
/* For communicating with separate mount thread. */
int status_pipe[2];
};
typedef struct fuse_private fuse_private_t;
struct fuse_graph_switch_args {
xlator_t *this;
xlator_t *old_subvol;
xlator_t *new_subvol;
};
typedef struct fuse_graph_switch_args fuse_graph_switch_args_t;
#define INVAL_BUF_SIZE (sizeof (struct fuse_out_header) + \
max (sizeof (struct fuse_notify_inval_inode_out), \
sizeof (struct fuse_notify_inval_entry_out) + \
NAME_MAX + 1))
#define _FH_TO_FD(fh) ((fd_t *)(uintptr_t)(fh))
#define FH_TO_FD(fh) ((_FH_TO_FD (fh))?(fd_ref (_FH_TO_FD (fh))):((fd_t *) 0))
#define FUSE_FOP(state, ret, op_num, fop, args ...) \
do { \
call_frame_t *frame = NULL; \
xlator_t *xl = NULL; \
int32_t op_ret = 0, op_errno = 0; \
\
frame = get_call_frame_for_req (state); \
if (!frame) { \
/* This is not completely clean, as some \
* earlier allocations might remain unfreed \
* if we return at this point, but still \
* better than trying to go on with a NULL \
* frame ... \
*/ \
gf_log_callingfn ("glusterfs-fuse", \
GF_LOG_ERROR, \
"FUSE message" \
" unique %"PRIu64" opcode %d:" \
" frame allocation failed", \
state->finh->unique, \
state->finh->opcode); \
free_fuse_state (state); \
/* ideally, need to 'return', but let the */ \
/* calling function take care of it */ \
break; \
} \
\
frame->root->state = state; \
frame->root->op = op_num; \
frame->op = op_num; \
\
xl = state->active_subvol; \
if (!xl) { \
gf_log_callingfn ("glusterfs-fuse", GF_LOG_ERROR, \
"xl is NULL"); \
op_errno = ENOENT; \
op_ret = -1; \
} else if (state->resolve.op_ret < 0) { \
op_errno = state->resolve.op_errno; \
op_ret = -1; \
/* gf_log_callingfn ("glusterfs-fuse", GF_LOG_WARNING, \
"resolve failed (%s)", \
strerror (op_errno)); */ \
} else if (state->resolve2.op_ret < 0) { \
op_errno = state->resolve2.op_errno; \
op_ret = -1; \
/* gf_log_callingfn ("glusterfs-fuse", GF_LOG_WARNING, \
"resolve of second entity " \
"failed (%s)", \
strerror (op_errno)); */ \
} \
\
if (op_ret < 0) { \
send_fuse_err (state->this, state->finh, op_errno); \
free_fuse_state (state); \
STACK_DESTROY (frame->root); \
} else { \
STACK_WIND (frame, ret, xl, xl->fops->fop, args); \
} \
\
} while (0)
#define FUSE_FOP_COOKIE(state, xl, ret, cky, op_num, fop, args ...) \
do { \
call_frame_t *frame = NULL; \
\
frame = get_call_frame_for_req (state); \
if (!frame) { \
gf_log ("glusterfs-fuse", \
GF_LOG_ERROR, \
"FUSE message" \
" unique %"PRIu64" opcode %d:" \
" frame allocation failed", \
state->finh->unique, \
state->finh->opcode); \
free_fuse_state (state); \
return 0; \
} \
\
frame->root->state = state; \
frame->root->op = op_num; \
frame->op = op_num; \
STACK_WIND_COOKIE (frame, ret, cky, xl, xl->fops->fop, args); \
} while (0)
#define GF_SELECT_LOG_LEVEL(_errno) \
(((_errno == ENOENT) || (_errno == ESTALE))? \
GF_LOG_DEBUG)
#define GET_STATE(this, finh, state) \
do { \
state = get_fuse_state (this, finh); \
if (!state) { \
gf_log ("glusterfs-fuse", \
GF_LOG_ERROR, \
"FUSE message unique %"PRIu64" opcode %d:" \
" state allocation failed", \
finh->unique, finh->opcode); \
\
send_fuse_err (this, finh, ENOMEM); \
GF_FREE (finh); \
\
return; \
} \
} while (0)
static inline xlator_t *
fuse_active_subvol (xlator_t *fuse)
{
fuse_private_t *priv = NULL;
priv = fuse->private;
return priv->active_subvol;
}
typedef enum {
RESOLVE_MUST = 1,
RESOLVE_NOT,
RESOLVE_MAY,
RESOLVE_DONTCARE,
RESOLVE_EXACT
} fuse_resolve_type_t;
typedef struct {
fuse_resolve_type_t type;
fd_t *fd;
char *path;
char *bname;
u_char gfid[16];
inode_t *hint;
u_char pargfid[16];
inode_t *parhint;
char *resolved;
int op_ret;
int op_errno;
loc_t resolve_loc;
} fuse_resolve_t;
typedef struct {
void *pool;
xlator_t *this;
xlator_t *active_subvol;
inode_table_t *itable;
loc_t loc;
loc_t loc2;
fuse_in_header_t *finh;
int32_t flags;
off_t off;
size_t size;
unsigned long nlookup;
fd_t *fd;
dict_t *xattr;
dict_t *xdata;
char *name;
char is_revalidate;
gf_boolean_t truncate_needed;
gf_lock_t lock;
uint64_t lk_owner;
/* used within resolve_and_resume */
/* */
fuse_resolve_t resolve;
fuse_resolve_t resolve2;
loc_t *loc_now;
fuse_resolve_t *resolve_now;
void *resume_fn;
int valid;
int mask;
dev_t rdev;
mode_t mode;
mode_t umask;
struct iatt attr;
struct gf_flock lk_lock;
struct iovec vector;
uuid_t gfid;
uint32_t io_flags;
int32_t fd_no;
} fuse_state_t;
typedef struct fuse_fd_ctx {
uint32_t open_flags;
char migration_failed;
fd_t *fd;
} fuse_fd_ctx_t;
typedef void (*fuse_resume_fn_t) (fuse_state_t *state);
GF_MUST_CHECK int32_t
fuse_loc_fill (loc_t *loc, fuse_state_t *state, ino_t ino,
ino_t par, const char *name);
call_frame_t *get_call_frame_for_req (fuse_state_t *state);
fuse_state_t *get_fuse_state (xlator_t *this, fuse_in_header_t *finh);
void free_fuse_state (fuse_state_t *state);
void gf_fuse_stat2attr (struct iatt *st, struct fuse_attr *fa);
uint64_t inode_to_fuse_nodeid (inode_t *inode);
xlator_t *fuse_active_subvol (xlator_t *fuse);
inode_t *fuse_ino_to_inode (uint64_t ino, xlator_t *fuse);
int send_fuse_err (xlator_t *this, fuse_in_header_t *finh, int error);
int fuse_gfid_set (fuse_state_t *state);
int fuse_flip_xattr_ns (struct fuse_private *priv, char *okey, char **nkey);
fuse_fd_ctx_t * __fuse_fd_ctx_check_n_create (xlator_t *this, fd_t *fd);
fuse_fd_ctx_t * fuse_fd_ctx_check_n_create (xlator_t *this, fd_t *fd);
int fuse_resolve_and_resume (fuse_state_t *state, fuse_resume_fn_t fn);
int fuse_resolve_inode_init (fuse_state_t *state, fuse_resolve_t *resolve,
ino_t ino);
int fuse_resolve_entry_init (fuse_state_t *state, fuse_resolve_t *resolve,
ino_t par, char *name);
int fuse_resolve_fd_init (fuse_state_t *state, fuse_resolve_t *resolve,
fd_t *fd);
#endif /* _GF_FUSE_BRIDGE_H_ */
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