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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.
*/
#include <libgen.h>
#include <unistd.h>
#include <fnmatch.h>
#include <sys/time.h>
#include <stdlib.h>
#include <signal.h>
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include "glusterfs.h"
#include "afr.h"
#include "dict.h"
#include "xlator.h"
#include "hashfn.h"
#include "logging.h"
#include "stack.h"
#include "list.h"
#include "call-stub.h"
#include "defaults.h"
#include "common-utils.h"
#include "compat-errno.h"
#include "compat.h"
#include "byte-order.h"
#include "statedump.h"
#include "fd.h"
#include "afr-inode-read.h"
#include "afr-inode-write.h"
#include "afr-dir-read.h"
#include "afr-dir-write.h"
#include "afr-transaction.h"
gf_boolean_t
afr_is_fd_fixable (fd_t *fd)
{
if (!fd || !fd->inode)
return _gf_false;
else if (fd_is_anonymous (fd))
return _gf_false;
else if (gf_uuid_is_null (fd->inode->gfid))
return _gf_false;
return _gf_true;
}
int
afr_open_ftruncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
int32_t op_ret, int32_t op_errno, struct iatt *prebuf,
struct iatt *postbuf, dict_t *xdata)
{
afr_local_t * local = frame->local;
AFR_STACK_UNWIND (open, frame, local->op_ret, local->op_errno,
local->fd, xdata);
return 0;
}
int
afr_open_cbk (call_frame_t *frame, void *cookie,
xlator_t *this, int32_t op_ret, int32_t op_errno,
fd_t *fd, dict_t *xdata)
{
afr_local_t * local = NULL;
int call_count = -1;
int child_index = (long) cookie;
afr_fd_ctx_t *fd_ctx = NULL;
local = frame->local;
fd_ctx = local->fd_ctx;
LOCK (&frame->lock);
{
if (op_ret == -1) {
local->op_errno = op_errno;
fd_ctx->opened_on[child_index] = AFR_FD_NOT_OPENED;
} else {
local->op_ret = op_ret;
fd_ctx->opened_on[child_index] = AFR_FD_OPENED;
if (!local->xdata_rsp && xdata)
local->xdata_rsp = dict_ref (xdata);
}
}
UNLOCK (&frame->lock);
call_count = afr_frame_return (frame);
if (call_count == 0) {
if ((fd_ctx->flags & O_TRUNC) && (local->op_ret >= 0)) {
STACK_WIND (frame, afr_open_ftruncate_cbk,
this, this->fops->ftruncate,
fd, 0, NULL);
} else {
AFR_STACK_UNWIND (open, frame, local->op_ret,
local->op_errno, local->fd,
local->xdata_rsp);
}
}
return 0;
}
int
afr_open (call_frame_t *frame, xlator_t *this, loc_t *loc, int32_t flags,
fd_t *fd, dict_t *xdata)
{
afr_private_t * priv = NULL;
afr_local_t * local = NULL;
int i = 0;
int32_t call_count = 0;
int32_t op_errno = 0;
afr_fd_ctx_t *fd_ctx = NULL;
//We can't let truncation to happen outside transaction.
priv = this->private;
local = AFR_FRAME_INIT (frame, op_errno);
if (!local)
goto out;
fd_ctx = afr_fd_ctx_get (fd, this);
if (!fd_ctx) {
op_errno = ENOMEM;
goto out;
}
local->fd = fd_ref (fd);
local->fd_ctx = fd_ctx;
fd_ctx->flags = flags;
call_count = local->call_count;
local->cont.open.flags = flags;
for (i = 0; i < priv->child_count; i++) {
if (local->child_up[i]) {
STACK_WIND_COOKIE (frame, afr_open_cbk, (void *) (long) i,
priv->children[i],
priv->children[i]->fops->open,
loc, (flags & ~O_TRUNC), fd, xdata);
if (!--call_count)
break;
}
}
return 0;
out:
AFR_STACK_UNWIND (open, frame, -1, op_errno, fd, NULL);
return 0;
}
int
afr_openfd_fix_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
int32_t op_ret, int32_t op_errno, fd_t *fd,
dict_t *xdata)
{
afr_local_t *local = NULL;
afr_private_t *priv = NULL;
afr_fd_ctx_t *fd_ctx = NULL;
int call_count = 0;
int child_index = (long) cookie;
priv = this->private;
local = frame->local;
if (op_ret >= 0) {
gf_log (this->name, GF_LOG_DEBUG, "fd for %s opened "
"successfully on subvolume %s", local->loc.path,
priv->children[child_index]->name);
} else {
gf_msg (this->name, fop_log_level (GF_FOP_OPEN, op_errno),
op_errno, AFR_MSG_OPEN_FAIL, "Failed to open %s on "
"subvolume %s", local->loc.path,
priv->children[child_index]->name);
}
fd_ctx = local->fd_ctx;
LOCK (&local->fd->lock);
{
if (op_ret >= 0) {
fd_ctx->opened_on[child_index] = AFR_FD_OPENED;
} else {
fd_ctx->opened_on[child_index] = AFR_FD_NOT_OPENED;
}
}
UNLOCK (&local->fd->lock);
call_count = afr_frame_return (frame);
if (call_count == 0)
AFR_STACK_DESTROY (frame);
return 0;
}
static int
afr_fd_ctx_need_open (fd_t *fd, xlator_t *this, unsigned char *need_open)
{
afr_fd_ctx_t *fd_ctx = NULL;
afr_private_t *priv = NULL;
int i = 0;
int count = 0;
priv = this->private;
fd_ctx = afr_fd_ctx_get (fd, this);
if (!fd_ctx)
return 0;
LOCK (&fd->lock);
{
for (i = 0; i < priv->child_count; i++) {
if (fd_ctx->opened_on[i] == AFR_FD_NOT_OPENED &&
priv->child_up[i]) {
fd_ctx->opened_on[i] = AFR_FD_OPENING;
need_open[i] = 1;
count++;
} else {
need_open[i] = 0;
}
}
}
UNLOCK (&fd->lock);
return count;
}
void
afr_fix_open (fd_t *fd, xlator_t *this)
{
afr_private_t *priv = NULL;
int i = 0;
call_frame_t *frame = NULL;
afr_local_t *local = NULL;
int ret = -1;
int32_t op_errno = 0;
afr_fd_ctx_t *fd_ctx = NULL;
unsigned char *need_open = NULL;
int call_count = 0;
priv = this->private;
if (!afr_is_fd_fixable (fd))
goto out;
fd_ctx = afr_fd_ctx_get (fd, this);
if (!fd_ctx)
goto out;
need_open = alloca0 (priv->child_count);
call_count = afr_fd_ctx_need_open (fd, this, need_open);
if (!call_count)
goto out;
frame = create_frame (this, this->ctx->pool);
if (!frame)
goto out;
local = AFR_FRAME_INIT (frame, op_errno);
if (!local)
goto out;
local->loc.inode = inode_ref (fd->inode);
ret = loc_path (&local->loc, NULL);
if (ret < 0)
goto out;
local->fd = fd_ref (fd);
local->fd_ctx = fd_ctx;
local->call_count = call_count;
gf_log (this->name, GF_LOG_DEBUG, "need open count: %d",
call_count);
for (i = 0; i < priv->child_count; i++) {
if (!need_open[i])
continue;
if (IA_IFDIR == fd->inode->ia_type) {
gf_log (this->name, GF_LOG_DEBUG,
"opening fd for dir %s on subvolume %s",
local->loc.path, priv->children[i]->name);
STACK_WIND_COOKIE (frame, afr_openfd_fix_open_cbk,
(void*) (long) i,
priv->children[i],
priv->children[i]->fops->opendir,
&local->loc, local->fd,
NULL);
} else {
gf_log (this->name, GF_LOG_DEBUG,
"opening fd for file %s on subvolume %s",
local->loc.path, priv->children[i]->name);
STACK_WIND_COOKIE (frame, afr_openfd_fix_open_cbk,
(void *)(long) i,
priv->children[i],
priv->children[i]->fops->open,
&local->loc,
fd_ctx->flags & (~O_TRUNC),
local->fd, NULL);
}
if (!--call_count)
break;
}
return;
out:
if (frame)
AFR_STACK_DESTROY (frame);
}
|
