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/*
Copyright (c) 2006-2012 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 _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>
#include "glusterfs.h"
#include "logging.h"
#include "xlator.h"
#include "defaults.h"
#include "common-utils.h"
#include "statedump.h"
#ifdef GF_DARWIN_HOST_OS
#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"
#include "gidcache.h"
#if defined(GF_LINUX_HOST_OS) || defined(__FreeBSD__) || defined(__NetBSD__)
#define FUSE_OP_HIGH (FUSE_READDIRPLUS + 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 negative_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;
int32_t fopen_keep_cache;
int32_t gid_cache_timeout;
gf_boolean_t enable_ino32;
/* This is the mount option for disabling the root-squash for the
mount irrespective of whether the root-squash option for the
volume is set or not. But this option is honoured only for
thr trusted clients. For non trusted clients this value does
not have any affect and the volume option for root-squash is
honoured.
*/
gf_boolean_t no_root_squash;
fdtable_t *fdtable;
gid_cache_t gid_cache;
char *fuse_mountopts;
/* 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];
/* for fuse queue length and congestion threshold */
int background_qlen;
int congestion_threshold;
/* for using fuse-kernel readdirp*/
gf_boolean_t use_readdirp;
/* fini started, helps prevent multiple epoll worker threads
* firing up the fini routine */
gf_boolean_t fini_invoked;
};
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 FUSE_EVENT_HISTORY_SIZE 1024
#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))
/* Use the same logic as the Linux NFS-client */
#define GF_FUSE_SQUASH_INO(ino) (((uint32_t) ino) ^ (ino >> 32))
#define FUSE_FOP(state, ret, op_num, fop, args ...) \
do { \
xlator_t *xl = NULL; \
call_frame_t *frame = NULL; \
\
xl = state->active_subvol; \
if (!xl) { \
gf_log_callingfn (state->this->name, GF_LOG_ERROR, \
"No active subvolume"); \
send_fuse_err (state->this, state->finh, ENOENT); \
free_fuse_state (state); \
break; \
} \
\
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 ... \
*/ \
send_fuse_err (state->this, state->finh, ENOMEM); \
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; \
\
if (state->this->history) \
gf_log_eh ("%"PRIu64", %s, path: (%s), gfid: " \
"(%s)", frame->root->unique, \
gf_fop_list[frame->root->op], \
state->loc.path, \
(state->fd == NULL)? \
uuid_utoa (state->loc.gfid): \
uuid_utoa (state->fd->inode->gfid)); \
STACK_WIND (frame, ret, 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)
#define FUSE_ENTRY_CREATE(this, priv, finh, state, fci, op) \
do { \
if (priv->proto_minor >= 12) \
state->mode &= ~fci->umask; \
if (priv->proto_minor >= 12 && priv->acl) { \
state->xdata = dict_new (); \
if (!state->xdata) { \
gf_log ("glusterfs-fuse", \
GF_LOG_WARNING, \
"%s failed to allocate " \
"a param dictionary", op); \
send_fuse_err (this, finh, ENOMEM); \
free_fuse_state (state); \
return; \
} \
state->umask = fci->umask; \
\
/* TODO: remove this after 3.4.0 release. keeping it for the \
sake of backward compatibility with old (3.3.[01]) \
releases till then. */ \
ret = dict_set_int16 (state->xdata, "umask", \
fci->umask); \
if (ret < 0) { \
gf_log ("glusterfs-fuse", \
GF_LOG_WARNING, \
"%s Failed adding umask"\
" to request", op); \
dict_destroy (state->xdata); \
send_fuse_err (this, finh, ENOMEM); \
free_fuse_state (state); \
return; \
} \
ret = dict_set_int16 (state->xdata, "mode", \
fci->mode); \
if (ret < 0) { \
gf_log ("glusterfs-fuse", \
GF_LOG_WARNING, \
"%s Failed adding mode " \
"to request", op); \
dict_destroy (state->xdata); \
send_fuse_err (this, finh, ENOMEM); \
free_fuse_state (state); \
return; \
} \
} \
} while (0)
#define fuse_log_eh_fop(this, state, frame, op_ret, op_errno) \
do { \
if (this->history) { \
if (state->fd) \
gf_log_eh ("op_ret: %d, op_errno: %d, " \
"%"PRIu64", %s () => %p, gfid: %s", \
op_ret, op_errno, \
frame->root->unique, \
gf_fop_list[frame->root->op], \
state->fd, \
uuid_utoa (state->fd->inode->gfid)); \
else \
gf_log_eh ("op_ret: %d, op_errno: %d, " \
"%"PRIu64", %s () => %s, gfid: %s", \
op_ret, op_errno, \
frame->root->unique, \
gf_fop_list[frame->root->op], \
state->loc.path, \
uuid_utoa (state->loc.gfid)); \
} \
} while(0)
#define fuse_log_eh(this, args...) \
do { \
if (this->history) \
gf_log_eh(args); \
} 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;
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 {
uint32_t open_flags;
char migration_failed;
fd_t *activefd;
} 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,
gf_boolean_t enable_ino32);
void gf_fuse_fill_dirent (gf_dirent_t *entry, struct fuse_dirent *fde,
gf_boolean_t enable_ino32);
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);
int fuse_ignore_xattr_set (fuse_private_t *priv, char *key);
void fuse_fop_resume (fuse_state_t *state);
int dump_history_fuse (circular_buffer_t *cb, void *data);
#endif /* _GF_FUSE_BRIDGE_H_ */
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