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From b924c8ca8a133fc9413c8ed1407e63f1658c7e79 Mon Sep 17 00:00:00 2001
From: Xavi Hernandez <xhernandez@redhat.com>
Date: Tue, 12 May 2020 23:54:54 +0200
Subject: [PATCH 523/526] open-behind: rewrite of internal logic
There was a critical flaw in the previous implementation of open-behind.
When an open is done in the background, it's necessary to take a
reference on the fd_t object because once we "fake" the open answer,
the fd could be destroyed. However as long as there's a reference,
the release function won't be called. So, if the application closes
the file descriptor without having actually opened it, there will
always remain at least 1 reference, causing a leak.
To avoid this problem, the previous implementation didn't take a
reference on the fd_t, so there were races where the fd could be
destroyed while it was still in use.
To fix this, I've implemented a new xlator cbk that gets called from
fuse when the application closes a file descriptor.
The whole logic of handling background opens have been simplified and
it's more efficient now. Only if the fop needs to be delayed until an
open completes, a stub is created. Otherwise no memory allocations are
needed.
Correctly handling the close request while the open is still pending
has added a bit of complexity, but overall normal operation is simpler.
Upstream patch:
> Upstream-patch-link: https://review.gluster.org/#/c/glusterfs/+/24451
> Change-Id: I6376a5491368e0e1c283cc452849032636261592
> Fixes: #1225
> Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
BUG: 1830713
Change-Id: I6376a5491368e0e1c283cc452849032636261592
Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
Reviewed-on: https://code.engineering.redhat.com/gerrit/224487
Tested-by: RHGS Build Bot <nigelb@redhat.com>
Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
---
libglusterfs/src/fd.c | 26 +
libglusterfs/src/glusterfs/fd.h | 3 +
libglusterfs/src/glusterfs/xlator.h | 4 +
libglusterfs/src/libglusterfs.sym | 1 +
tests/basic/open-behind/open-behind.t | 183 +++
tests/basic/open-behind/tester-fd.c | 99 ++
tests/basic/open-behind/tester.c | 444 +++++++
tests/basic/open-behind/tester.h | 145 +++
tests/bugs/glusterfs/bug-873962-spb.t | 1 +
xlators/mount/fuse/src/fuse-bridge.c | 2 +
.../open-behind/src/open-behind-messages.h | 6 +-
xlators/performance/open-behind/src/open-behind.c | 1302 ++++++++------------
12 files changed, 1393 insertions(+), 823 deletions(-)
create mode 100644 tests/basic/open-behind/open-behind.t
create mode 100644 tests/basic/open-behind/tester-fd.c
create mode 100644 tests/basic/open-behind/tester.c
create mode 100644 tests/basic/open-behind/tester.h
diff --git a/libglusterfs/src/fd.c b/libglusterfs/src/fd.c
index 314546a..e4ec401 100644
--- a/libglusterfs/src/fd.c
+++ b/libglusterfs/src/fd.c
@@ -501,6 +501,32 @@ out:
}
void
+fd_close(fd_t *fd)
+{
+ xlator_t *xl, *old_THIS;
+
+ old_THIS = THIS;
+
+ for (xl = fd->inode->table->xl->graph->first; xl != NULL; xl = xl->next) {
+ if (!xl->call_cleanup) {
+ THIS = xl;
+
+ if (IA_ISDIR(fd->inode->ia_type)) {
+ if (xl->cbks->fdclosedir != NULL) {
+ xl->cbks->fdclosedir(xl, fd);
+ }
+ } else {
+ if (xl->cbks->fdclose != NULL) {
+ xl->cbks->fdclose(xl, fd);
+ }
+ }
+ }
+ }
+
+ THIS = old_THIS;
+}
+
+void
fd_unref(fd_t *fd)
{
int32_t refcount = 0;
diff --git a/libglusterfs/src/glusterfs/fd.h b/libglusterfs/src/glusterfs/fd.h
index cdbe289..4d157c4 100644
--- a/libglusterfs/src/glusterfs/fd.h
+++ b/libglusterfs/src/glusterfs/fd.h
@@ -107,6 +107,9 @@ fd_ref(fd_t *fd);
void
fd_unref(fd_t *fd);
+void
+fd_close(fd_t *fd);
+
fd_t *
fd_create(struct _inode *inode, pid_t pid);
diff --git a/libglusterfs/src/glusterfs/xlator.h b/libglusterfs/src/glusterfs/xlator.h
index 8650ccc..273039a 100644
--- a/libglusterfs/src/glusterfs/xlator.h
+++ b/libglusterfs/src/glusterfs/xlator.h
@@ -705,6 +705,8 @@ typedef size_t (*cbk_inodectx_size_t)(xlator_t *this, inode_t *inode);
typedef size_t (*cbk_fdctx_size_t)(xlator_t *this, fd_t *fd);
+typedef void (*cbk_fdclose_t)(xlator_t *this, fd_t *fd);
+
struct xlator_cbks {
cbk_forget_t forget;
cbk_release_t release;
@@ -715,6 +717,8 @@ struct xlator_cbks {
cbk_ictxmerge_t ictxmerge;
cbk_inodectx_size_t ictxsize;
cbk_fdctx_size_t fdctxsize;
+ cbk_fdclose_t fdclose;
+ cbk_fdclose_t fdclosedir;
};
typedef int32_t (*dumpop_priv_t)(xlator_t *this);
diff --git a/libglusterfs/src/libglusterfs.sym b/libglusterfs/src/libglusterfs.sym
index bc770e2..0a0862e 100644
--- a/libglusterfs/src/libglusterfs.sym
+++ b/libglusterfs/src/libglusterfs.sym
@@ -456,6 +456,7 @@ event_unregister_close
fd_anonymous
fd_anonymous_with_flags
fd_bind
+fd_close
fd_create
fd_create_uint64
__fd_ctx_del
diff --git a/tests/basic/open-behind/open-behind.t b/tests/basic/open-behind/open-behind.t
new file mode 100644
index 0000000..5e865d6
--- /dev/null
+++ b/tests/basic/open-behind/open-behind.t
@@ -0,0 +1,183 @@
+#!/bin/bash
+
+WD="$(dirname "${0}")"
+
+. ${WD}/../../include.rc
+. ${WD}/../../volume.rc
+
+function assign() {
+ local _assign_var="${1}"
+ local _assign_value="${2}"
+
+ printf -v "${_assign_var}" "%s" "${_assign_value}"
+}
+
+function pipe_create() {
+ local _pipe_create_var="${1}"
+ local _pipe_create_name
+ local _pipe_create_fd
+
+ _pipe_create_name="$(mktemp -u)"
+ mkfifo "${_pipe_create_name}"
+ exec {_pipe_create_fd}<>"${_pipe_create_name}"
+ rm "${_pipe_create_name}"
+
+ assign "${_pipe_create_var}" "${_pipe_create_fd}"
+}
+
+function pipe_close() {
+ local _pipe_close_fd="${!1}"
+
+ exec {_pipe_close_fd}>&-
+}
+
+function tester_start() {
+ declare -ag tester
+ local tester_in
+ local tester_out
+
+ pipe_create tester_in
+ pipe_create tester_out
+
+ ${WD}/tester <&${tester_in} >&${tester_out} &
+
+ tester=("$!" "${tester_in}" "${tester_out}")
+}
+
+function tester_send() {
+ declare -ag tester
+ local tester_res
+ local tester_extra
+
+ echo "${*}" >&${tester[1]}
+
+ read -t 3 -u ${tester[2]} tester_res tester_extra
+ echo "${tester_res} ${tester_extra}"
+ if [[ "${tester_res}" == "OK" ]]; then
+ return 0
+ fi
+
+ return 1
+}
+
+function tester_stop() {
+ declare -ag tester
+ local tester_res
+
+ tester_send "quit"
+
+ tester_res=0
+ if ! wait ${tester[0]}; then
+ tester_res=$?
+ fi
+
+ unset tester
+
+ return ${tester_res}
+}
+
+function count_open() {
+ local file="$(realpath "${B0}/${V0}/${1}")"
+ local count="0"
+ local inode
+ local ref
+
+ inode="$(stat -c %i "${file}")"
+
+ for fd in /proc/${BRICK_PID}/fd/*; do
+ ref="$(readlink "${fd}")"
+ if [[ "${ref}" == "${B0}/${V0}/"* ]]; then
+ if [[ "$(stat -c %i "${ref}")" == "${inode}" ]]; then
+ count="$((${count} + 1))"
+ fi
+ fi
+ done
+
+ echo "${count}"
+}
+
+cleanup
+
+TEST build_tester ${WD}/tester.c ${WD}/tester-fd.c
+
+TEST glusterd
+TEST pidof glusterd
+TEST ${CLI} volume create ${V0} ${H0}:${B0}/${V0}
+TEST ${CLI} volume set ${V0} flush-behind off
+TEST ${CLI} volume set ${V0} write-behind off
+TEST ${CLI} volume set ${V0} quick-read off
+TEST ${CLI} volume set ${V0} stat-prefetch on
+TEST ${CLI} volume set ${V0} io-cache off
+TEST ${CLI} volume set ${V0} open-behind on
+TEST ${CLI} volume set ${V0} lazy-open off
+TEST ${CLI} volume set ${V0} read-after-open off
+TEST ${CLI} volume start ${V0}
+
+TEST ${GFS} --volfile-id=/${V0} --volfile-server=${H0} ${M0};
+
+BRICK_PID="$(get_brick_pid ${V0} ${H0} ${B0}/${V0})"
+
+TEST touch "${M0}/test"
+
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+TEST ${GFS} --volfile-id=/${V0} --volfile-server=${H0} ${M0};
+
+TEST tester_start
+
+TEST tester_send fd open 0 "${M0}/test"
+EXPECT_WITHIN 5 "1" count_open "/test"
+TEST tester_send fd close 0
+EXPECT_WITHIN 5 "0" count_open "/test"
+
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+TEST ${CLI} volume set ${V0} lazy-open on
+TEST ${GFS} --volfile-id=/${V0} --volfile-server=${H0} ${M0};
+
+TEST tester_send fd open 0 "${M0}/test"
+sleep 2
+EXPECT "0" count_open "/test"
+TEST tester_send fd write 0 "test"
+EXPECT "1" count_open "/test"
+TEST tester_send fd close 0
+EXPECT_WITHIN 5 "0" count_open "/test"
+
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+TEST ${GFS} --volfile-id=/${V0} --volfile-server=${H0} ${M0};
+
+TEST tester_send fd open 0 "${M0}/test"
+EXPECT "0" count_open "/test"
+EXPECT "test" tester_send fd read 0 64
+# Even though read-after-open is disabled, use-anonymous-fd is also disabled,
+# so reads need to open the file first.
+EXPECT "1" count_open "/test"
+TEST tester_send fd close 0
+EXPECT "0" count_open "/test"
+
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+TEST ${GFS} --volfile-id=/${V0} --volfile-server=${H0} ${M0};
+
+TEST tester_send fd open 0 "${M0}/test"
+EXPECT "0" count_open "/test"
+TEST tester_send fd open 1 "${M0}/test"
+EXPECT "2" count_open "/test"
+TEST tester_send fd close 0
+EXPECT_WITHIN 5 "1" count_open "/test"
+TEST tester_send fd close 1
+EXPECT_WITHIN 5 "0" count_open "/test"
+
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+TEST ${CLI} volume set ${V0} read-after-open on
+TEST ${GFS} --volfile-id=/${V0} --volfile-server=${H0} ${M0};
+
+TEST tester_send fd open 0 "${M0}/test"
+EXPECT "0" count_open "/test"
+EXPECT "test" tester_send fd read 0 64
+EXPECT "1" count_open "/test"
+TEST tester_send fd close 0
+EXPECT_WITHIN 5 "0" count_open "/test"
+
+EXPECT_WITHIN $UMOUNT_TIMEOUT "Y" force_umount $M0
+
+TEST tester_stop
+
+cleanup
diff --git a/tests/basic/open-behind/tester-fd.c b/tests/basic/open-behind/tester-fd.c
new file mode 100644
index 0000000..00f02bc
--- /dev/null
+++ b/tests/basic/open-behind/tester-fd.c
@@ -0,0 +1,99 @@
+/*
+ Copyright (c) 2020 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 "tester.h"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+static int32_t
+fd_open(context_t *ctx, command_t *cmd)
+{
+ obj_t *obj;
+ int32_t fd;
+
+ obj = cmd->args[0].obj.ref;
+
+ fd = open(cmd->args[1].str.data, O_RDWR);
+ if (fd < 0) {
+ return error(errno, "open() failed");
+ }
+
+ obj->type = OBJ_TYPE_FD;
+ obj->fd = fd;
+
+ out_ok("%d", fd);
+
+ return 0;
+}
+
+static int32_t
+fd_close(context_t *ctx, command_t *cmd)
+{
+ obj_t *obj;
+
+ obj = cmd->args[0].obj.ref;
+ obj->type = OBJ_TYPE_NONE;
+
+ if (close(obj->fd) != 0) {
+ return error(errno, "close() failed");
+ }
+
+ out_ok();
+
+ return 0;
+}
+
+static int32_t
+fd_write(context_t *ctx, command_t *cmd)
+{
+ ssize_t len, ret;
+
+ len = strlen(cmd->args[1].str.data);
+ ret = write(cmd->args[0].obj.ref->fd, cmd->args[1].str.data, len);
+ if (ret < 0) {
+ return error(errno, "write() failed");
+ }
+
+ out_ok("%zd", ret);
+
+ return 0;
+}
+
+static int32_t
+fd_read(context_t *ctx, command_t *cmd)
+{
+ char data[cmd->args[1].num.value + 1];
+ ssize_t ret;
+
+ ret = read(cmd->args[0].obj.ref->fd, data, cmd->args[1].num.value);
+ if (ret < 0) {
+ return error(errno, "read() failed");
+ }
+
+ data[ret] = 0;
+
+ out_ok("%zd %s", ret, data);
+
+ return 0;
+}
+
+command_t fd_commands[] = {
+ {"open", fd_open, CMD_ARGS(ARG_VAL(OBJ_TYPE_NONE), ARG_STR(1024))},
+ {"close", fd_close, CMD_ARGS(ARG_VAL(OBJ_TYPE_FD))},
+ {"write", fd_write, CMD_ARGS(ARG_VAL(OBJ_TYPE_FD), ARG_STR(1024))},
+ {"read", fd_read, CMD_ARGS(ARG_VAL(OBJ_TYPE_FD), ARG_NUM(0, 1024))},
+ CMD_END};
diff --git a/tests/basic/open-behind/tester.c b/tests/basic/open-behind/tester.c
new file mode 100644
index 0000000..b2da71c
--- /dev/null
+++ b/tests/basic/open-behind/tester.c
@@ -0,0 +1,444 @@
+/*
+ Copyright (c) 2020 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 "tester.h"
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+static void *
+mem_alloc(size_t size)
+{
+ void *ptr;
+
+ ptr = malloc(size);
+ if (ptr == NULL) {
+ error(ENOMEM, "Failed to allocate memory (%zu bytes)", size);
+ }
+
+ return ptr;
+}
+
+static void
+mem_free(void *ptr)
+{
+ free(ptr);
+}
+
+static bool
+buffer_create(context_t *ctx, size_t size)
+{
+ ctx->buffer.base = mem_alloc(size);
+ if (ctx->buffer.base == NULL) {
+ return false;
+ }
+
+ ctx->buffer.size = size;
+ ctx->buffer.len = 0;
+ ctx->buffer.pos = 0;
+
+ return true;
+}
+
+static void
+buffer_destroy(context_t *ctx)
+{
+ mem_free(ctx->buffer.base);
+ ctx->buffer.size = 0;
+ ctx->buffer.len = 0;
+}
+
+static int32_t
+buffer_get(context_t *ctx)
+{
+ ssize_t len;
+
+ if (ctx->buffer.pos >= ctx->buffer.len) {
+ len = read(0, ctx->buffer.base, ctx->buffer.size);
+ if (len < 0) {
+ return error(errno, "read() failed");
+ }
+ if (len == 0) {
+ return 0;
+ }
+
+ ctx->buffer.len = len;
+ ctx->buffer.pos = 0;
+ }
+
+ return ctx->buffer.base[ctx->buffer.pos++];
+}
+
+static int32_t
+str_skip_spaces(context_t *ctx, int32_t current)
+{
+ while ((current > 0) && (current != '\n') && isspace(current)) {
+ current = buffer_get(ctx);
+ }
+
+ return current;
+}
+
+static int32_t
+str_token(context_t *ctx, char *buffer, uint32_t size, int32_t current)
+{
+ uint32_t len;
+
+ current = str_skip_spaces(ctx, current);
+
+ len = 0;
+ while ((size > 0) && (current > 0) && (current != '\n') &&
+ !isspace(current)) {
+ len++;
+ *buffer++ = current;
+ size--;
+ current = buffer_get(ctx);
+ }
+
+ if (len == 0) {
+ return error(ENODATA, "Expecting a token");
+ }
+
+ if (size == 0) {
+ return error(ENOBUFS, "Token too long");
+ }
+
+ *buffer = 0;
+
+ return current;
+}
+
+static int32_t
+str_number(context_t *ctx, uint64_t min, uint64_t max, uint64_t *value,
+ int32_t current)
+{
+ char text[32], *ptr;
+ uint64_t num;
+
+ current = str_token(ctx, text, sizeof(text), current);
+ if (current > 0) {
+ num = strtoul(text, &ptr, 0);
+ if ((*ptr != 0) || (num < min) || (num > max)) {
+ return error(ERANGE, "Invalid number");
+ }
+ *value = num;
+ }
+
+ return current;
+}
+
+static int32_t
+str_eol(context_t *ctx, int32_t current)
+{
+ current = str_skip_spaces(ctx, current);
+ if (current != '\n') {
+ return error(EINVAL, "Expecting end of command");
+ }
+
+ return current;
+}
+
+static void
+str_skip(context_t *ctx, int32_t current)
+{
+ while ((current > 0) && (current != '\n')) {
+ current = buffer_get(ctx);
+ }
+}
+
+static int32_t
+cmd_parse_obj(context_t *ctx, arg_t *arg, int32_t current)
+{
+ obj_t *obj;
+ uint64_t id;
+
+ current = str_number(ctx, 0, ctx->obj_count, &id, current);
+ if (current <= 0) {
+ return current;
+ }
+
+ obj = &ctx->objs[id];
+ if (obj->type != arg->obj.type) {
+ if (obj->type != OBJ_TYPE_NONE) {
+ return error(EBUSY, "Object is in use");
+ }
+ return error(ENOENT, "Object is not defined");
+ }
+
+ arg->obj.ref = obj;
+
+ return current;
+}
+
+static int32_t
+cmd_parse_num(context_t *ctx, arg_t *arg, int32_t current)
+{
+ return str_number(ctx, arg->num.min, arg->num.max, &arg->num.value,
+ current);
+}
+
+static int32_t
+cmd_parse_str(context_t *ctx, arg_t *arg, int32_t current)
+{
+ return str_token(ctx, arg->str.data, arg->str.size, current);
+}
+
+static int32_t
+cmd_parse_args(context_t *ctx, command_t *cmd, int32_t current)
+{
+ arg_t *arg;
+
+ for (arg = cmd->args; arg->type != ARG_TYPE_NONE; arg++) {
+ switch (arg->type) {
+ case ARG_TYPE_OBJ:
+ current = cmd_parse_obj(ctx, arg, current);
+ break;
+ case ARG_TYPE_NUM:
+ current = cmd_parse_num(ctx, arg, current);
+ break;
+ case ARG_TYPE_STR:
+ current = cmd_parse_str(ctx, arg, current);
+ break;
+ default:
+ return error(EINVAL, "Unknown argument type");
+ }
+ }
+
+ if (current < 0) {
+ return current;
+ }
+
+ current = str_eol(ctx, current);
+ if (current <= 0) {
+ return error(EINVAL, "Syntax error");
+ }
+
+ return cmd->handler(ctx, cmd);
+}
+
+static int32_t
+cmd_parse(context_t *ctx, command_t *cmds)
+{
+ char text[32];
+ command_t *cmd;
+ int32_t current;
+
+ cmd = cmds;
+ do {
+ current = str_token(ctx, text, sizeof(text), buffer_get(ctx));
+ if (current <= 0) {
+ return current;
+ }
+
+ while (cmd->name != NULL) {
+ if (strcmp(cmd->name, text) == 0) {
+ if (cmd->handler != NULL) {
+ return cmd_parse_args(ctx, cmd, current);
+ }
+ cmd = cmd->cmds;
+ break;
+ }
+ cmd++;
+ }
+ } while (cmd->name != NULL);
+
+ str_skip(ctx, current);
+
+ return error(ENOTSUP, "Unknown command");
+}
+
+static void
+cmd_fini(context_t *ctx, command_t *cmds)
+{
+ command_t *cmd;
+ arg_t *arg;
+
+ for (cmd = cmds; cmd->name != NULL; cmd++) {
+ if (cmd->handler == NULL) {
+ cmd_fini(ctx, cmd->cmds);
+ } else {
+ for (arg = cmd->args; arg->type != ARG_TYPE_NONE; arg++) {
+ switch (arg->type) {
+ case ARG_TYPE_STR:
+ mem_free(arg->str.data);
+ arg->str.data = NULL;
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+}
+
+static bool
+cmd_init(context_t *ctx, command_t *cmds)
+{
+ command_t *cmd;
+ arg_t *arg;
+
+ for (cmd = cmds; cmd->name != NULL; cmd++) {
+ if (cmd->handler == NULL) {
+ if (!cmd_init(ctx, cmd->cmds)) {
+ return false;
+ }
+ } else {
+ for (arg = cmd->args; arg->type != ARG_TYPE_NONE; arg++) {
+ switch (arg->type) {
+ case ARG_TYPE_STR:
+ arg->str.data = mem_alloc(arg->str.size);
+ if (arg->str.data == NULL) {
+ return false;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+
+ return true;
+}
+
+static bool
+objs_create(context_t *ctx, uint32_t count)
+{
+ uint32_t i;
+
+ ctx->objs = mem_alloc(sizeof(obj_t) * count);
+ if (ctx->objs == NULL) {
+ return false;
+ }
+ ctx->obj_count = count;
+
+ for (i = 0; i < count; i++) {
+ ctx->objs[i].type = OBJ_TYPE_NONE;
+ }
+
+ return true;
+}
+
+static int32_t
+objs_destroy(context_t *ctx)
+{
+ uint32_t i;
+ int32_t err;
+
+ err = 0;
+ for (i = 0; i < ctx->obj_count; i++) {
+ if (ctx->objs[i].type != OBJ_TYPE_NONE) {
+ err = error(ENOTEMPTY, "Objects not destroyed");
+ break;
+ }
+ }
+
+ mem_free(ctx->objs);
+ ctx->objs = NULL;
+ ctx->obj_count = 0;
+
+ return err;
+}
+
+static context_t *
+init(size_t size, uint32_t objs, command_t *cmds)
+{
+ context_t *ctx;
+
+ ctx = mem_alloc(sizeof(context_t));
+ if (ctx == NULL) {
+ goto failed;
+ }
+
+ if (!buffer_create(ctx, size)) {
+ goto failed_ctx;
+ }
+
+ if (!objs_create(ctx, objs)) {
+ goto failed_buffer;
+ }
+
+ if (!cmd_init(ctx, cmds)) {
+ goto failed_objs;
+ }
+
+ ctx->active = true;
+
+ return ctx;
+
+failed_objs:
+ cmd_fini(ctx, cmds);
+ objs_destroy(ctx);
+failed_buffer:
+ buffer_destroy(ctx);
+failed_ctx:
+ mem_free(ctx);
+failed:
+ return NULL;
+}
+
+static int32_t
+fini(context_t *ctx, command_t *cmds)
+{
+ int32_t ret;
+
+ cmd_fini(ctx, cmds);
+ buffer_destroy(ctx);
+
+ ret = objs_destroy(ctx);
+
+ ctx->active = false;
+
+ return ret;
+}
+
+static int32_t
+exec_quit(context_t *ctx, command_t *cmd)
+{
+ ctx->active = false;
+
+ return 0;
+}
+
+static command_t commands[] = {{"fd", NULL, CMD_SUB(fd_commands)},
+ {"quit", exec_quit, CMD_ARGS()},
+ CMD_END};
+
+int32_t
+main(int32_t argc, char *argv[])
+{
+ context_t *ctx;
+ int32_t res;
+
+ ctx = init(1024, 16, commands);
+ if (ctx == NULL) {
+ return 1;
+ }
+
+ do {
+ res = cmd_parse(ctx, commands);
+ if (res < 0) {
+ out_err(-res);
+ }
+ } while (ctx->active);
+
+ res = fini(ctx, commands);
+ if (res >= 0) {
+ out_ok();
+ return 0;
+ }
+
+ out_err(-res);
+
+ return 1;
+}
diff --git a/tests/basic/open-behind/tester.h b/tests/basic/open-behind/tester.h
new file mode 100644
index 0000000..64e940c
--- /dev/null
+++ b/tests/basic/open-behind/tester.h
@@ -0,0 +1,145 @@
+/*
+ Copyright (c) 2020 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 __TESTER_H__
+#define __TESTER_H__
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <stdbool.h>
+
+enum _obj_type;
+typedef enum _obj_type obj_type_t;
+
+enum _arg_type;
+typedef enum _arg_type arg_type_t;
+
+struct _buffer;
+typedef struct _buffer buffer_t;
+
+struct _obj;
+typedef struct _obj obj_t;
+
+struct _context;
+typedef struct _context context_t;
+
+struct _arg;
+typedef struct _arg arg_t;
+
+struct _command;
+typedef struct _command command_t;
+
+enum _obj_type { OBJ_TYPE_NONE, OBJ_TYPE_FD };
+
+enum _arg_type { ARG_TYPE_NONE, ARG_TYPE_OBJ, ARG_TYPE_NUM, ARG_TYPE_STR };
+
+struct _buffer {
+ char *base;
+ uint32_t size;
+ uint32_t len;
+ uint32_t pos;
+};
+
+struct _obj {
+ obj_type_t type;
+ union {
+ int32_t fd;
+ };
+};
+
+struct _context {
+ obj_t *objs;
+ buffer_t buffer;
+ uint32_t obj_count;
+ bool active;
+};
+
+struct _arg {
+ arg_type_t type;
+ union {
+ struct {
+ obj_type_t type;
+ obj_t *ref;
+ } obj;
+ struct {
+ uint64_t value;
+ uint64_t min;
+ uint64_t max;
+ } num;
+ struct {
+ uint32_t size;
+ char *data;
+ } str;
+ };
+};
+
+struct _command {
+ const char *name;
+ int32_t (*handler)(context_t *ctx, command_t *cmd);
+ union {
+ arg_t *args;
+ command_t *cmds;
+ };
+};
+
+#define msg(_stream, _fmt, _args...) \
+ do { \
+ fprintf(_stream, _fmt "\n", ##_args); \
+ fflush(_stream); \
+ } while (0)
+
+#define msg_out(_fmt, _args...) msg(stdout, _fmt, ##_args)
+#define msg_err(_err, _fmt, _args...) \
+ ({ \
+ int32_t __msg_err = (_err); \
+ msg(stderr, "[%4u:%-15s] " _fmt, __LINE__, __FUNCTION__, __msg_err, \
+ ##_args); \
+ -__msg_err; \
+ })
+
+#define error(_err, _fmt, _args...) msg_err(_err, "E(%4d) " _fmt, ##_args)
+#define warn(_err, _fmt, _args...) msg_err(_err, "W(%4d) " _fmt, ##_args)
+#define info(_err, _fmt, _args...) msg_err(_err, "I(%4d) " _fmt, ##_args)
+
+#define out_ok(_args...) msg_out("OK " _args)
+#define out_err(_err) msg_out("ERR %d", _err)
+
+#define ARG_END \
+ { \
+ ARG_TYPE_NONE \
+ }
+
+#define CMD_ARGS1(_x, _args...) \
+ .args = (arg_t[]) { _args }
+#define CMD_ARGS(_args...) CMD_ARGS1(, ##_args, ARG_END)
+
+#define CMD_SUB(_cmds) .cmds = _cmds
+
+#define CMD_END \
+ { \
+ NULL, NULL, CMD_SUB(NULL) \
+ }
+
+#define ARG_VAL(_type) \
+ { \
+ ARG_TYPE_OBJ, .obj = {.type = _type } \
+ }
+#define ARG_NUM(_min, _max) \
+ { \
+ ARG_TYPE_NUM, .num = {.min = _min, .max = _max } \
+ }
+#define ARG_STR(_size) \
+ { \
+ ARG_TYPE_STR, .str = {.size = _size } \
+ }
+
+extern command_t fd_commands[];
+
+#endif /* __TESTER_H__ */
\ No newline at end of file
diff --git a/tests/bugs/glusterfs/bug-873962-spb.t b/tests/bugs/glusterfs/bug-873962-spb.t
index db84a22..db71cc0 100644
--- a/tests/bugs/glusterfs/bug-873962-spb.t
+++ b/tests/bugs/glusterfs/bug-873962-spb.t
@@ -14,6 +14,7 @@ TEST $CLI volume set $V0 performance.io-cache off
TEST $CLI volume set $V0 performance.write-behind off
TEST $CLI volume set $V0 performance.stat-prefetch off
TEST $CLI volume set $V0 performance.read-ahead off
+TEST $CLI volume set $V0 performance.open-behind off
TEST $CLI volume set $V0 cluster.background-self-heal-count 0
TEST $CLI volume start $V0
TEST glusterfs --entry-timeout=0 --attribute-timeout=0 -s $H0 --volfile-id=$V0 $M0 --direct-io-mode=enable
diff --git a/xlators/mount/fuse/src/fuse-bridge.c b/xlators/mount/fuse/src/fuse-bridge.c
index 919eea3..76b5809 100644
--- a/xlators/mount/fuse/src/fuse-bridge.c
+++ b/xlators/mount/fuse/src/fuse-bridge.c
@@ -3398,6 +3398,8 @@ fuse_release(xlator_t *this, fuse_in_header_t *finh, void *msg,
gf_log("glusterfs-fuse", GF_LOG_TRACE,
"finh->unique: %" PRIu64 ": RELEASE %p", finh->unique, state->fd);
+ fd_close(state->fd);
+
fuse_fd_ctx_destroy(this, state->fd);
fd_unref(fd);
diff --git a/xlators/performance/open-behind/src/open-behind-messages.h b/xlators/performance/open-behind/src/open-behind-messages.h
index f250824..0e78917 100644
--- a/xlators/performance/open-behind/src/open-behind-messages.h
+++ b/xlators/performance/open-behind/src/open-behind-messages.h
@@ -23,6 +23,10 @@
*/
GLFS_MSGID(OPEN_BEHIND, OPEN_BEHIND_MSG_XLATOR_CHILD_MISCONFIGURED,
- OPEN_BEHIND_MSG_VOL_MISCONFIGURED, OPEN_BEHIND_MSG_NO_MEMORY);
+ OPEN_BEHIND_MSG_VOL_MISCONFIGURED, OPEN_BEHIND_MSG_NO_MEMORY,
+ OPEN_BEHIND_MSG_FAILED, OPEN_BEHIND_MSG_BAD_STATE);
+
+#define OPEN_BEHIND_MSG_FAILED_STR "Failed to submit fop"
+#define OPEN_BEHIND_MSG_BAD_STATE_STR "Unexpected state"
#endif /* _OPEN_BEHIND_MESSAGES_H_ */
diff --git a/xlators/performance/open-behind/src/open-behind.c b/xlators/performance/open-behind/src/open-behind.c
index cbe89ec..e43fe73 100644
--- a/xlators/performance/open-behind/src/open-behind.c
+++ b/xlators/performance/open-behind/src/open-behind.c
@@ -16,6 +16,18 @@
#include "open-behind-messages.h"
#include <glusterfs/glusterfs-acl.h>
+/* Note: The initial design of open-behind was made to cover the simple case
+ * of open, read, close for small files. This pattern combined with
+ * quick-read can do the whole operation without a single request to the
+ * bricks (except the initial lookup).
+ *
+ * The way to do this has been improved, but the logic remains the same.
+ * Basically, this means that any operation sent to the fd or the inode
+ * that it's not a read, causes the open request to be sent to the
+ * bricks, and all future operations will be executed synchronously,
+ * including opens (it's reset once all fd's are closed).
+ */
+
typedef struct ob_conf {
gf_boolean_t use_anonymous_fd; /* use anonymous FDs wherever safe
e.g - fstat() readv()
@@ -32,1096 +44,754 @@ typedef struct ob_conf {
*/
} ob_conf_t;
-typedef struct ob_inode {
- inode_t *inode;
- struct list_head resume_fops;
- struct list_head ob_fds;
- int count;
- int op_ret;
- int op_errno;
- gf_boolean_t open_in_progress;
- int unlinked;
-} ob_inode_t;
+/* A negative state represents an errno value negated. In this case the
+ * current operation cannot be processed. */
+typedef enum _ob_state {
+ /* There are no opens on the inode or the first open is already
+ * completed. The current operation can be sent directly. */
+ OB_STATE_READY = 0,
-typedef struct ob_fd {
- call_frame_t *open_frame;
- loc_t loc;
- dict_t *xdata;
- int flags;
- int op_errno;
- ob_inode_t *ob_inode;
- fd_t *fd;
- gf_boolean_t opened;
- gf_boolean_t ob_inode_fops_waiting;
- struct list_head list;
- struct list_head ob_fds_on_inode;
-} ob_fd_t;
+ /* There's an open pending and it has been triggered. The current
+ * operation should be "stubbified" and processed with
+ * ob_stub_dispatch(). */
+ OB_STATE_OPEN_TRIGGERED,
-ob_inode_t *
-ob_inode_alloc(inode_t *inode)
-{
- ob_inode_t *ob_inode = NULL;
+ /* There's an open pending but it has not been triggered. The current
+ * operation can be processed directly but using an anonymous fd. */
+ OB_STATE_OPEN_PENDING,
- ob_inode = GF_CALLOC(1, sizeof(*ob_inode), gf_ob_mt_inode_t);
- if (ob_inode == NULL)
- goto out;
+ /* The current operation is the first open on the inode. */
+ OB_STATE_FIRST_OPEN
+} ob_state_t;
- ob_inode->inode = inode;
- INIT_LIST_HEAD(&ob_inode->resume_fops);
- INIT_LIST_HEAD(&ob_inode->ob_fds);
-out:
- return ob_inode;
-}
-
-void
-ob_inode_free(ob_inode_t *ob_inode)
-{
- if (ob_inode == NULL)
- goto out;
+typedef struct ob_inode {
+ /* List of stubs pending on the first open. Once the first open is
+ * complete, all these stubs will be resubmitted, and dependencies
+ * will be checked again. */
+ struct list_head resume_fops;
- list_del_init(&ob_inode->resume_fops);
- list_del_init(&ob_inode->ob_fds);
+ /* The inode this object references. */
+ inode_t *inode;
- GF_FREE(ob_inode);
-out:
- return;
-}
+ /* The fd from the first open sent to this inode. It will be set
+ * from the moment the open is processed until the open if fully
+ * executed or closed before actually opened. It's NULL in all
+ * other cases. */
+ fd_t *first_fd;
+
+ /* The stub from the first open operation. When open fop starts
+ * being processed, it's assigned the OB_OPEN_PREPARING value
+ * until the actual stub is created. This is necessary to avoid
+ * creating the stub inside a locked region. Once the stub is
+ * successfully created, it's assigned here. This value is set
+ * to NULL once the stub is resumed. */
+ call_stub_t *first_open;
+
+ /* The total number of currently open fd's on this inode. */
+ int32_t open_count;
+
+ /* This flag is set as soon as we know that the open will be
+ * sent to the bricks, even before the stub is ready. */
+ bool triggered;
+} ob_inode_t;
-ob_inode_t *
-ob_inode_get(xlator_t *this, inode_t *inode)
+/* Dummy pointer used temporarily while the actual open stub is being created */
+#define OB_OPEN_PREPARING ((call_stub_t *)-1)
+
+#define OB_POST_COMMON(_fop, _xl, _frame, _fd, _args...) \
+ case OB_STATE_FIRST_OPEN: \
+ gf_smsg((_xl)->name, GF_LOG_ERROR, EINVAL, OPEN_BEHIND_MSG_BAD_STATE, \
+ "fop=%s", #_fop, "state=%d", __ob_state, NULL); \
+ default_##_fop##_failure_cbk(_frame, EINVAL); \
+ break; \
+ case OB_STATE_READY: \
+ default_##_fop(_frame, _xl, ##_args); \
+ break; \
+ case OB_STATE_OPEN_TRIGGERED: { \
+ call_stub_t *__ob_stub = fop_##_fop##_stub(_frame, ob_##_fop, \
+ ##_args); \
+ if (__ob_stub != NULL) { \
+ ob_stub_dispatch(_xl, __ob_inode, _fd, __ob_stub); \
+ break; \
+ } \
+ __ob_state = -ENOMEM; \
+ } \
+ default: \
+ gf_smsg((_xl)->name, GF_LOG_ERROR, -__ob_state, \
+ OPEN_BEHIND_MSG_FAILED, "fop=%s", #_fop, NULL); \
+ default_##_fop##_failure_cbk(_frame, -__ob_state)
+
+#define OB_POST_FD(_fop, _xl, _frame, _fd, _trigger, _args...) \
+ do { \
+ ob_inode_t *__ob_inode; \
+ fd_t *__first_fd; \
+ ob_state_t __ob_state = ob_open_and_resume_fd( \
+ _xl, _fd, 0, true, _trigger, &__ob_inode, &__first_fd); \
+ switch (__ob_state) { \
+ case OB_STATE_OPEN_PENDING: \
+ if (!(_trigger)) { \
+ fd_t *__ob_fd = fd_anonymous_with_flags((_fd)->inode, \
+ (_fd)->flags); \
+ if (__ob_fd != NULL) { \
+ default_##_fop(_frame, _xl, ##_args); \
+ fd_unref(__ob_fd); \
+ break; \
+ } \
+ __ob_state = -ENOMEM; \
+ } \
+ OB_POST_COMMON(_fop, _xl, _frame, __first_fd, ##_args); \
+ } \
+ } while (0)
+
+#define OB_POST_FLUSH(_xl, _frame, _fd, _args...) \
+ do { \
+ ob_inode_t *__ob_inode; \
+ fd_t *__first_fd; \
+ ob_state_t __ob_state = ob_open_and_resume_fd( \
+ _xl, _fd, 0, true, false, &__ob_inode, &__first_fd); \
+ switch (__ob_state) { \
+ case OB_STATE_OPEN_PENDING: \
+ default_flush_cbk(_frame, NULL, _xl, 0, 0, NULL); \
+ break; \
+ OB_POST_COMMON(flush, _xl, _frame, __first_fd, ##_args); \
+ } \
+ } while (0)
+
+#define OB_POST_INODE(_fop, _xl, _frame, _inode, _trigger, _args...) \
+ do { \
+ ob_inode_t *__ob_inode; \
+ fd_t *__first_fd; \
+ ob_state_t __ob_state = ob_open_and_resume_inode( \
+ _xl, _inode, NULL, 0, true, _trigger, &__ob_inode, &__first_fd); \
+ switch (__ob_state) { \
+ case OB_STATE_OPEN_PENDING: \
+ OB_POST_COMMON(_fop, _xl, _frame, __first_fd, ##_args); \
+ } \
+ } while (0)
+
+static ob_inode_t *
+ob_inode_get_locked(xlator_t *this, inode_t *inode)
{
ob_inode_t *ob_inode = NULL;
uint64_t value = 0;
- int ret = 0;
- if (!inode)
- goto out;
+ if ((__inode_ctx_get(inode, this, &value) == 0) && (value != 0)) {
+ return (ob_inode_t *)(uintptr_t)value;
+ }
- LOCK(&inode->lock);
- {
- __inode_ctx_get(inode, this, &value);
- if (value == 0) {
- ob_inode = ob_inode_alloc(inode);
- if (ob_inode == NULL)
- goto unlock;
-
- value = (uint64_t)(uintptr_t)ob_inode;
- ret = __inode_ctx_set(inode, this, &value);
- if (ret < 0) {
- ob_inode_free(ob_inode);
- ob_inode = NULL;
- }
- } else {
- ob_inode = (ob_inode_t *)(uintptr_t)value;
+ ob_inode = GF_CALLOC(1, sizeof(*ob_inode), gf_ob_mt_inode_t);
+ if (ob_inode != NULL) {
+ ob_inode->inode = inode;
+ INIT_LIST_HEAD(&ob_inode->resume_fops);
+
+ value = (uint64_t)(uintptr_t)ob_inode;
+ if (__inode_ctx_set(inode, this, &value) < 0) {
+ GF_FREE(ob_inode);
+ ob_inode = NULL;
}
}
-unlock:
- UNLOCK(&inode->lock);
-out:
return ob_inode;
}
-ob_fd_t *
-__ob_fd_ctx_get(xlator_t *this, fd_t *fd)
+static ob_state_t
+ob_open_and_resume_inode(xlator_t *xl, inode_t *inode, fd_t *fd,
+ int32_t open_count, bool synchronous, bool trigger,
+ ob_inode_t **pob_inode, fd_t **pfd)
{
- uint64_t value = 0;
- int ret = -1;
- ob_fd_t *ob_fd = NULL;
+ ob_conf_t *conf;
+ ob_inode_t *ob_inode;
+ call_stub_t *open_stub;
- ret = __fd_ctx_get(fd, this, &value);
- if (ret)
- return NULL;
+ if (inode == NULL) {
+ return OB_STATE_READY;
+ }
- ob_fd = (void *)((long)value);
+ conf = xl->private;
- return ob_fd;
-}
+ *pfd = NULL;
-ob_fd_t *
-ob_fd_ctx_get(xlator_t *this, fd_t *fd)
-{
- ob_fd_t *ob_fd = NULL;
-
- LOCK(&fd->lock);
+ LOCK(&inode->lock);
{
- ob_fd = __ob_fd_ctx_get(this, fd);
- }
- UNLOCK(&fd->lock);
-
- return ob_fd;
-}
+ ob_inode = ob_inode_get_locked(xl, inode);
+ if (ob_inode == NULL) {
+ UNLOCK(&inode->lock);
-int
-__ob_fd_ctx_set(xlator_t *this, fd_t *fd, ob_fd_t *ob_fd)
-{
- uint64_t value = 0;
- int ret = -1;
+ return -ENOMEM;
+ }
+ *pob_inode = ob_inode;
+
+ ob_inode->open_count += open_count;
+
+ /* If first_fd is not NULL, it means that there's a previous open not
+ * yet completed. */
+ if (ob_inode->first_fd != NULL) {
+ *pfd = ob_inode->first_fd;
+ /* If the current request doesn't trigger the open and it hasn't
+ * been triggered yet, we can continue without issuing the open
+ * only if the current request belongs to the same fd as the
+ * first one. */
+ if (!trigger && !ob_inode->triggered &&
+ (ob_inode->first_fd == fd)) {
+ UNLOCK(&inode->lock);
+
+ return OB_STATE_OPEN_PENDING;
+ }
- value = (long)((void *)ob_fd);
+ /* We need to issue the open. It could have already been triggered
+ * before. In this case open_stub will be NULL. Or the initial open
+ * may not be completely ready yet. In this case open_stub will be
+ * OB_OPEN_PREPARING. */
+ open_stub = ob_inode->first_open;
+ ob_inode->first_open = NULL;
+ ob_inode->triggered = true;
- ret = __fd_ctx_set(fd, this, value);
+ UNLOCK(&inode->lock);
- return ret;
-}
+ if ((open_stub != NULL) && (open_stub != OB_OPEN_PREPARING)) {
+ call_resume(open_stub);
+ }
-int
-ob_fd_ctx_set(xlator_t *this, fd_t *fd, ob_fd_t *ob_fd)
-{
- int ret = -1;
+ return OB_STATE_OPEN_TRIGGERED;
+ }
- LOCK(&fd->lock);
- {
- ret = __ob_fd_ctx_set(this, fd, ob_fd);
- }
- UNLOCK(&fd->lock);
+ /* There's no pending open. Only opens can be non synchronous, so all
+ * regular fops will be processed directly. For non synchronous opens,
+ * we'll still process them normally (i.e. synchornous) if there are
+ * more file descriptors open. */
+ if (synchronous || (ob_inode->open_count > open_count)) {
+ UNLOCK(&inode->lock);
- return ret;
-}
+ return OB_STATE_READY;
+ }
-ob_fd_t *
-ob_fd_new(void)
-{
- ob_fd_t *ob_fd = NULL;
+ *pfd = fd;
- ob_fd = GF_CALLOC(1, sizeof(*ob_fd), gf_ob_mt_fd_t);
+ /* This is the first open. We keep a reference on the fd and set
+ * first_open stub to OB_OPEN_PREPARING until the actual stub can
+ * be assigned (we don't create the stub here to avoid doing memory
+ * allocations inside the mutex). */
+ ob_inode->first_fd = __fd_ref(fd);
+ ob_inode->first_open = OB_OPEN_PREPARING;
- INIT_LIST_HEAD(&ob_fd->list);
- INIT_LIST_HEAD(&ob_fd->ob_fds_on_inode);
+ /* If lazy_open is not set, we'll need to immediately send the open,
+ * so we set triggered right now. */
+ ob_inode->triggered = !conf->lazy_open;
+ }
+ UNLOCK(&inode->lock);
- return ob_fd;
+ return OB_STATE_FIRST_OPEN;
}
-void
-ob_fd_free(ob_fd_t *ob_fd)
+static ob_state_t
+ob_open_and_resume_fd(xlator_t *xl, fd_t *fd, int32_t open_count,
+ bool synchronous, bool trigger, ob_inode_t **pob_inode,
+ fd_t **pfd)
{
- LOCK(&ob_fd->fd->inode->lock);
- {
- list_del_init(&ob_fd->ob_fds_on_inode);
- }
- UNLOCK(&ob_fd->fd->inode->lock);
-
- loc_wipe(&ob_fd->loc);
-
- if (ob_fd->xdata)
- dict_unref(ob_fd->xdata);
+ uint64_t err;
- if (ob_fd->open_frame) {
- /* If we sill have a frame it means that background open has never
- * been triggered. We need to release the pending reference. */
- fd_unref(ob_fd->fd);
-
- STACK_DESTROY(ob_fd->open_frame->root);
+ if ((fd_ctx_get(fd, xl, &err) == 0) && (err != 0)) {
+ return (ob_state_t)-err;
}
- GF_FREE(ob_fd);
+ return ob_open_and_resume_inode(xl, fd->inode, fd, open_count, synchronous,
+ trigger, pob_inode, pfd);
}
-int
-ob_wake_cbk(call_frame_t *frame, void *cookie, xlator_t *this, int op_ret,
- int op_errno, fd_t *fd_ret, dict_t *xdata)
+static ob_state_t
+ob_open_behind(xlator_t *xl, fd_t *fd, int32_t flags, ob_inode_t **pob_inode,
+ fd_t **pfd)
{
- fd_t *fd = NULL;
- int count = 0;
- int ob_inode_op_ret = 0;
- int ob_inode_op_errno = 0;
- ob_fd_t *ob_fd = NULL;
- call_stub_t *stub = NULL, *tmp = NULL;
- ob_inode_t *ob_inode = NULL;
- gf_boolean_t ob_inode_fops_waiting = _gf_false;
- struct list_head fops_waiting_on_fd, fops_waiting_on_inode;
+ bool synchronous;
- fd = frame->local;
- frame->local = NULL;
-
- INIT_LIST_HEAD(&fops_waiting_on_fd);
- INIT_LIST_HEAD(&fops_waiting_on_inode);
+ /* TODO: If O_CREAT, O_APPEND, O_WRONLY or O_DIRECT are specified, shouldn't
+ * we also execute this open synchronously ? */
+ synchronous = (flags & O_TRUNC) != 0;
- ob_inode = ob_inode_get(this, fd->inode);
+ return ob_open_and_resume_fd(xl, fd, 1, synchronous, true, pob_inode, pfd);
+}
- LOCK(&fd->lock);
+static int32_t
+ob_stub_dispatch(xlator_t *xl, ob_inode_t *ob_inode, fd_t *fd,
+ call_stub_t *stub)
+{
+ LOCK(&ob_inode->inode->lock);
{
- ob_fd = __ob_fd_ctx_get(this, fd);
- ob_fd->opened = _gf_true;
-
- ob_inode_fops_waiting = ob_fd->ob_inode_fops_waiting;
-
- list_splice_init(&ob_fd->list, &fops_waiting_on_fd);
-
- if (op_ret < 0) {
- /* mark fd BAD for ever */
- ob_fd->op_errno = op_errno;
- ob_fd = NULL; /*shouldn't be freed*/
- } else {
- __fd_ctx_del(fd, this, NULL);
- }
- }
- UNLOCK(&fd->lock);
-
- if (ob_inode_fops_waiting) {
- LOCK(&fd->inode->lock);
- {
- count = --ob_inode->count;
- if (op_ret < 0) {
- /* TODO: when to reset the error? */
- ob_inode->op_ret = -1;
- ob_inode->op_errno = op_errno;
- }
-
- if (count == 0) {
- ob_inode->open_in_progress = _gf_false;
- ob_inode_op_ret = ob_inode->op_ret;
- ob_inode_op_errno = ob_inode->op_errno;
- list_splice_init(&ob_inode->resume_fops,
- &fops_waiting_on_inode);
- }
+ /* We only queue a stub if the open has not been completed or
+ * cancelled. */
+ if (ob_inode->first_fd == fd) {
+ list_add_tail(&stub->list, &ob_inode->resume_fops);
+ stub = NULL;
}
- UNLOCK(&fd->inode->lock);
- }
-
- if (ob_fd)
- ob_fd_free(ob_fd);
-
- list_for_each_entry_safe(stub, tmp, &fops_waiting_on_fd, list)
- {
- list_del_init(&stub->list);
-
- if (op_ret < 0)
- call_unwind_error(stub, -1, op_errno);
- else
- call_resume(stub);
}
+ UNLOCK(&ob_inode->inode->lock);
- list_for_each_entry_safe(stub, tmp, &fops_waiting_on_inode, list)
- {
- list_del_init(&stub->list);
-
- if (ob_inode_op_ret < 0)
- call_unwind_error(stub, -1, ob_inode_op_errno);
- else
- call_resume(stub);
+ if (stub != NULL) {
+ call_resume(stub);
}
- /* The background open is completed. We can release the 'fd' reference. */
- fd_unref(fd);
-
- STACK_DESTROY(frame->root);
-
return 0;
}
-int
-ob_fd_wake(xlator_t *this, fd_t *fd, ob_fd_t *ob_fd)
+static int32_t
+ob_open_dispatch(xlator_t *xl, ob_inode_t *ob_inode, fd_t *fd,
+ call_stub_t *stub)
{
- call_frame_t *frame = NULL;
-
- if (ob_fd == NULL) {
- LOCK(&fd->lock);
- {
- ob_fd = __ob_fd_ctx_get(this, fd);
- if (!ob_fd)
- goto unlock;
+ bool closed;
- frame = ob_fd->open_frame;
- ob_fd->open_frame = NULL;
- }
- unlock:
- UNLOCK(&fd->lock);
- } else {
- LOCK(&fd->lock);
- {
- frame = ob_fd->open_frame;
- ob_fd->open_frame = NULL;
+ LOCK(&ob_inode->inode->lock);
+ {
+ closed = ob_inode->first_fd != fd;
+ if (!closed) {
+ if (ob_inode->triggered) {
+ ob_inode->first_open = NULL;
+ } else {
+ ob_inode->first_open = stub;
+ stub = NULL;
+ }
}
- UNLOCK(&fd->lock);
}
+ UNLOCK(&ob_inode->inode->lock);
- if (frame) {
- /* We don't need to take a reference here. We already have a reference
- * while the open is pending. */
- frame->local = fd;
-
- STACK_WIND(frame, ob_wake_cbk, FIRST_CHILD(this),
- FIRST_CHILD(this)->fops->open, &ob_fd->loc, ob_fd->flags, fd,
- ob_fd->xdata);
+ if (stub != NULL) {
+ if (closed) {
+ call_stub_destroy(stub);
+ fd_unref(fd);
+ } else {
+ call_resume(stub);
+ }
}
return 0;
}
-void
-ob_inode_wake(xlator_t *this, struct list_head *ob_fds)
+static void
+ob_resume_pending(struct list_head *list)
{
- ob_fd_t *ob_fd = NULL, *tmp = NULL;
+ call_stub_t *stub;
- if (!list_empty(ob_fds)) {
- list_for_each_entry_safe(ob_fd, tmp, ob_fds, ob_fds_on_inode)
- {
- ob_fd_wake(this, ob_fd->fd, ob_fd);
- ob_fd_free(ob_fd);
- }
- }
-}
+ while (!list_empty(list)) {
+ stub = list_first_entry(list, call_stub_t, list);
+ list_del_init(&stub->list);
-/* called holding inode->lock and fd->lock */
-void
-ob_fd_copy(ob_fd_t *src, ob_fd_t *dst)
-{
- if (!src || !dst)
- goto out;
-
- dst->fd = src->fd;
- dst->loc.inode = inode_ref(src->loc.inode);
- gf_uuid_copy(dst->loc.gfid, src->loc.gfid);
- dst->flags = src->flags;
- dst->xdata = dict_ref(src->xdata);
- dst->ob_inode = src->ob_inode;
-out:
- return;
+ call_resume(stub);
+ }
}
-int
-open_all_pending_fds_and_resume(xlator_t *this, inode_t *inode,
- call_stub_t *stub)
+static void
+ob_open_completed(xlator_t *xl, ob_inode_t *ob_inode, fd_t *fd, int32_t op_ret,
+ int32_t op_errno)
{
- ob_inode_t *ob_inode = NULL;
- ob_fd_t *ob_fd = NULL, *tmp = NULL;
- gf_boolean_t was_open_in_progress = _gf_false;
- gf_boolean_t wait_for_open = _gf_false;
- struct list_head ob_fds;
+ struct list_head list;
- ob_inode = ob_inode_get(this, inode);
- if (ob_inode == NULL)
- goto out;
+ INIT_LIST_HEAD(&list);
- INIT_LIST_HEAD(&ob_fds);
+ if (op_ret < 0) {
+ fd_ctx_set(fd, xl, op_errno <= 0 ? EIO : op_errno);
+ }
- LOCK(&inode->lock);
+ LOCK(&ob_inode->inode->lock);
{
- was_open_in_progress = ob_inode->open_in_progress;
- ob_inode->unlinked = 1;
-
- if (was_open_in_progress) {
- list_add_tail(&stub->list, &ob_inode->resume_fops);
- goto inode_unlock;
- }
-
- list_for_each_entry(ob_fd, &ob_inode->ob_fds, ob_fds_on_inode)
- {
- LOCK(&ob_fd->fd->lock);
- {
- if (ob_fd->opened)
- goto fd_unlock;
-
- ob_inode->count++;
- ob_fd->ob_inode_fops_waiting = _gf_true;
-
- if (ob_fd->open_frame == NULL) {
- /* open in progress no need of wake */
- } else {
- tmp = ob_fd_new();
- tmp->open_frame = ob_fd->open_frame;
- ob_fd->open_frame = NULL;
-
- ob_fd_copy(ob_fd, tmp);
- list_add_tail(&tmp->ob_fds_on_inode, &ob_fds);
- }
- }
- fd_unlock:
- UNLOCK(&ob_fd->fd->lock);
- }
-
- if (ob_inode->count) {
- wait_for_open = ob_inode->open_in_progress = _gf_true;
- list_add_tail(&stub->list, &ob_inode->resume_fops);
+ /* Only update the fields if the file has not been closed before
+ * getting here. */
+ if (ob_inode->first_fd == fd) {
+ list_splice_init(&ob_inode->resume_fops, &list);
+ ob_inode->first_fd = NULL;
+ ob_inode->first_open = NULL;
+ ob_inode->triggered = false;
}
}
-inode_unlock:
- UNLOCK(&inode->lock);
+ UNLOCK(&ob_inode->inode->lock);
-out:
- if (!was_open_in_progress) {
- if (!wait_for_open) {
- call_resume(stub);
- } else {
- ob_inode_wake(this, &ob_fds);
- }
- }
+ ob_resume_pending(&list);
- return 0;
+ fd_unref(fd);
}
-int
-open_and_resume(xlator_t *this, fd_t *fd, call_stub_t *stub)
+static int32_t
+ob_open_cbk(call_frame_t *frame, void *cookie, xlator_t *xl, int32_t op_ret,
+ int32_t op_errno, fd_t *fd, dict_t *xdata)
{
- ob_fd_t *ob_fd = NULL;
- int op_errno = 0;
-
- if (!fd)
- goto nofd;
-
- LOCK(&fd->lock);
- {
- ob_fd = __ob_fd_ctx_get(this, fd);
- if (!ob_fd)
- goto unlock;
+ ob_inode_t *ob_inode;
- if (ob_fd->op_errno) {
- op_errno = ob_fd->op_errno;
- goto unlock;
- }
+ ob_inode = frame->local;
+ frame->local = NULL;
- list_add_tail(&stub->list, &ob_fd->list);
- }
-unlock:
- UNLOCK(&fd->lock);
+ ob_open_completed(xl, ob_inode, cookie, op_ret, op_errno);
-nofd:
- if (op_errno)
- call_unwind_error(stub, -1, op_errno);
- else if (ob_fd)
- ob_fd_wake(this, fd, NULL);
- else
- call_resume(stub);
+ STACK_DESTROY(frame->root);
return 0;
}
-int
-ob_open_behind(call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
+static int32_t
+ob_open_resume(call_frame_t *frame, xlator_t *this, loc_t *loc, int flags,
fd_t *fd, dict_t *xdata)
{
- ob_fd_t *ob_fd = NULL;
- int ret = -1;
- ob_conf_t *conf = NULL;
- ob_inode_t *ob_inode = NULL;
- gf_boolean_t open_in_progress = _gf_false;
- int unlinked = 0;
-
- conf = this->private;
-
- if (flags & O_TRUNC) {
- STACK_WIND(frame, default_open_cbk, FIRST_CHILD(this),
- FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata);
- return 0;
- }
-
- ob_inode = ob_inode_get(this, fd->inode);
-
- ob_fd = ob_fd_new();
- if (!ob_fd)
- goto enomem;
-
- ob_fd->ob_inode = ob_inode;
-
- ob_fd->fd = fd;
-
- ob_fd->open_frame = copy_frame(frame);
- if (!ob_fd->open_frame)
- goto enomem;
- ret = loc_copy(&ob_fd->loc, loc);
- if (ret)
- goto enomem;
-
- ob_fd->flags = flags;
- if (xdata)
- ob_fd->xdata = dict_ref(xdata);
-
- LOCK(&fd->inode->lock);
- {
- open_in_progress = ob_inode->open_in_progress;
- unlinked = ob_inode->unlinked;
- if (!open_in_progress && !unlinked) {
- ret = ob_fd_ctx_set(this, fd, ob_fd);
- if (ret) {
- UNLOCK(&fd->inode->lock);
- goto enomem;
- }
-
- list_add(&ob_fd->ob_fds_on_inode, &ob_inode->ob_fds);
- }
- }
- UNLOCK(&fd->inode->lock);
-
- /* We take a reference while the background open is pending or being
- * processed. If we finally wind the request in the foreground, then
- * ob_fd_free() will take care of this additional reference. */
- fd_ref(fd);
-
- if (!open_in_progress && !unlinked) {
- STACK_UNWIND_STRICT(open, frame, 0, 0, fd, xdata);
-
- if (!conf->lazy_open)
- ob_fd_wake(this, fd, NULL);
- } else {
- ob_fd_free(ob_fd);
- STACK_WIND(frame, default_open_cbk, FIRST_CHILD(this),
- FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata);
- }
+ STACK_WIND_COOKIE(frame, ob_open_cbk, fd, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->open, loc, flags, fd, xdata);
return 0;
-enomem:
- if (ob_fd) {
- if (ob_fd->open_frame)
- STACK_DESTROY(ob_fd->open_frame->root);
-
- loc_wipe(&ob_fd->loc);
- if (ob_fd->xdata)
- dict_unref(ob_fd->xdata);
-
- GF_FREE(ob_fd);
- }
-
- return -1;
}
-int
+static int32_t
ob_open(call_frame_t *frame, xlator_t *this, loc_t *loc, int flags, fd_t *fd,
dict_t *xdata)
{
- fd_t *old_fd = NULL;
- int ret = -1;
- int op_errno = ENOMEM;
- call_stub_t *stub = NULL;
-
- old_fd = fd_lookup(fd->inode, 0);
- if (old_fd) {
- /* open-behind only when this is the first FD */
- stub = fop_open_stub(frame, default_open_resume, loc, flags, fd, xdata);
- if (!stub) {
- fd_unref(old_fd);
- goto err;
- }
-
- open_and_resume(this, old_fd, stub);
+ ob_inode_t *ob_inode;
+ call_frame_t *open_frame;
+ call_stub_t *stub;
+ fd_t *first_fd;
+ ob_state_t state;
+
+ state = ob_open_behind(this, fd, flags, &ob_inode, &first_fd);
+ if (state == OB_STATE_READY) {
+ /* There's no pending open, but there are other file descriptors opened
+ * or the current flags require a synchronous open. */
+ return default_open(frame, this, loc, flags, fd, xdata);
+ }
- fd_unref(old_fd);
+ if (state == OB_STATE_OPEN_TRIGGERED) {
+ /* The first open is in progress (either because it was already issued
+ * or because this request triggered it). We try to create a new stub
+ * to retry the operation once the initial open completes. */
+ stub = fop_open_stub(frame, ob_open, loc, flags, fd, xdata);
+ if (stub != NULL) {
+ return ob_stub_dispatch(this, ob_inode, first_fd, stub);
+ }
- return 0;
+ state = -ENOMEM;
}
- ret = ob_open_behind(frame, this, loc, flags, fd, xdata);
- if (ret) {
- goto err;
- }
+ if (state == OB_STATE_FIRST_OPEN) {
+ /* We try to create a stub for the new open. A new frame needs to be
+ * used because the current one may be destroyed soon after sending
+ * the open's reply. */
+ open_frame = copy_frame(frame);
+ if (open_frame != NULL) {
+ stub = fop_open_stub(open_frame, ob_open_resume, loc, flags, fd,
+ xdata);
+ if (stub != NULL) {
+ open_frame->local = ob_inode;
- return 0;
-err:
- gf_msg(this->name, GF_LOG_ERROR, op_errno, OPEN_BEHIND_MSG_NO_MEMORY, "%s",
- loc->path);
+ /* TODO: Previous version passed xdata back to the caller, but
+ * probably this doesn't make sense since it won't contain
+ * any requested data. I think it would be better to pass
+ * NULL for xdata. */
+ default_open_cbk(frame, NULL, this, 0, 0, fd, xdata);
- STACK_UNWIND_STRICT(open, frame, -1, op_errno, 0, 0);
+ return ob_open_dispatch(this, ob_inode, first_fd, stub);
+ }
- return 0;
-}
+ STACK_DESTROY(open_frame->root);
+ }
-fd_t *
-ob_get_wind_fd(xlator_t *this, fd_t *fd, uint32_t *flag)
-{
- fd_t *wind_fd = NULL;
- ob_fd_t *ob_fd = NULL;
- ob_conf_t *conf = NULL;
+ /* In case of error, simulate a regular completion but with an error
+ * code. */
+ ob_open_completed(this, ob_inode, first_fd, -1, ENOMEM);
- conf = this->private;
+ state = -ENOMEM;
+ }
- ob_fd = ob_fd_ctx_get(this, fd);
+ /* In case of failure we need to decrement the number of open files because
+ * ob_fdclose() won't be called. */
- if (ob_fd && ob_fd->open_frame && conf->use_anonymous_fd) {
- wind_fd = fd_anonymous(fd->inode);
- if ((ob_fd->flags & O_DIRECT) && (flag))
- *flag = *flag | O_DIRECT;
- } else {
- wind_fd = fd_ref(fd);
+ LOCK(&fd->inode->lock);
+ {
+ ob_inode->open_count--;
}
+ UNLOCK(&fd->inode->lock);
- return wind_fd;
+ gf_smsg(this->name, GF_LOG_ERROR, -state, OPEN_BEHIND_MSG_FAILED, "fop=%s",
+ "open", "path=%s", loc->path, NULL);
+
+ return default_open_failure_cbk(frame, -state);
}
-int
+static int32_t
ob_readv(call_frame_t *frame, xlator_t *this, fd_t *fd, size_t size,
off_t offset, uint32_t flags, dict_t *xdata)
{
- call_stub_t *stub = NULL;
- fd_t *wind_fd = NULL;
- ob_conf_t *conf = NULL;
+ ob_conf_t *conf = this->private;
+ bool trigger = conf->read_after_open || !conf->use_anonymous_fd;
- conf = this->private;
-
- if (!conf->read_after_open)
- wind_fd = ob_get_wind_fd(this, fd, &flags);
- else
- wind_fd = fd_ref(fd);
-
- stub = fop_readv_stub(frame, default_readv_resume, wind_fd, size, offset,
- flags, xdata);
- fd_unref(wind_fd);
-
- if (!stub)
- goto err;
-
- open_and_resume(this, wind_fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(readv, frame, -1, ENOMEM, 0, 0, 0, 0, 0);
+ OB_POST_FD(readv, this, frame, fd, trigger, fd, size, offset, flags, xdata);
return 0;
}
-int
+static int32_t
ob_writev(call_frame_t *frame, xlator_t *this, fd_t *fd, struct iovec *iov,
int count, off_t offset, uint32_t flags, struct iobref *iobref,
dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_writev_stub(frame, default_writev_resume, fd, iov, count, offset,
- flags, iobref, xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(writev, frame, -1, ENOMEM, 0, 0, 0);
+ OB_POST_FD(writev, this, frame, fd, true, fd, iov, count, offset, flags,
+ iobref, xdata);
return 0;
}
-int
+static int32_t
ob_fstat(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
{
- call_stub_t *stub = NULL;
- fd_t *wind_fd = NULL;
-
- wind_fd = ob_get_wind_fd(this, fd, NULL);
-
- stub = fop_fstat_stub(frame, default_fstat_resume, wind_fd, xdata);
+ ob_conf_t *conf = this->private;
+ bool trigger = !conf->use_anonymous_fd;
- fd_unref(wind_fd);
-
- if (!stub)
- goto err;
-
- open_and_resume(this, wind_fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(fstat, frame, -1, ENOMEM, 0, 0);
+ OB_POST_FD(fstat, this, frame, fd, trigger, fd, xdata);
return 0;
}
-int
+static int32_t
ob_seek(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
gf_seek_what_t what, dict_t *xdata)
{
- call_stub_t *stub = NULL;
- fd_t *wind_fd = NULL;
-
- wind_fd = ob_get_wind_fd(this, fd, NULL);
+ ob_conf_t *conf = this->private;
+ bool trigger = !conf->use_anonymous_fd;
- stub = fop_seek_stub(frame, default_seek_resume, wind_fd, offset, what,
- xdata);
-
- fd_unref(wind_fd);
-
- if (!stub)
- goto err;
-
- open_and_resume(this, wind_fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(fstat, frame, -1, ENOMEM, 0, 0);
+ OB_POST_FD(seek, this, frame, fd, trigger, fd, offset, what, xdata);
return 0;
}
-int
+static int32_t
ob_flush(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xdata)
{
- call_stub_t *stub = NULL;
- ob_fd_t *ob_fd = NULL;
- gf_boolean_t unwind = _gf_false;
-
- LOCK(&fd->lock);
- {
- ob_fd = __ob_fd_ctx_get(this, fd);
- if (ob_fd && ob_fd->open_frame)
- /* if open() was never wound to backend,
- no need to wind flush() either.
- */
- unwind = _gf_true;
- }
- UNLOCK(&fd->lock);
-
- if (unwind)
- goto unwind;
-
- stub = fop_flush_stub(frame, default_flush_resume, fd, xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(flush, frame, -1, ENOMEM, 0);
-
- return 0;
-
-unwind:
- STACK_UNWIND_STRICT(flush, frame, 0, 0, 0);
+ OB_POST_FLUSH(this, frame, fd, fd, xdata);
return 0;
}
-int
+static int32_t
ob_fsync(call_frame_t *frame, xlator_t *this, fd_t *fd, int flag, dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_fsync_stub(frame, default_fsync_resume, fd, flag, xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(fsync, frame, -1, ENOMEM, 0, 0, 0);
+ OB_POST_FD(fsync, this, frame, fd, true, fd, flag, xdata);
return 0;
}
-int
+static int32_t
ob_lk(call_frame_t *frame, xlator_t *this, fd_t *fd, int cmd,
struct gf_flock *flock, dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_lk_stub(frame, default_lk_resume, fd, cmd, flock, xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(lk, frame, -1, ENOMEM, 0, 0);
+ OB_POST_FD(lk, this, frame, fd, true, fd, cmd, flock, xdata);
return 0;
}
-int
+static int32_t
ob_ftruncate(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_ftruncate_stub(frame, default_ftruncate_resume, fd, offset,
- xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(ftruncate, frame, -1, ENOMEM, 0, 0, 0);
+ OB_POST_FD(ftruncate, this, frame, fd, true, fd, offset, xdata);
return 0;
}
-int
+static int32_t
ob_fsetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, dict_t *xattr,
int flags, dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_fsetxattr_stub(frame, default_fsetxattr_resume, fd, xattr, flags,
- xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(fsetxattr, frame, -1, ENOMEM, 0);
+ OB_POST_FD(fsetxattr, this, frame, fd, true, fd, xattr, flags, xdata);
return 0;
}
-int
+static int32_t
ob_fgetxattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *name,
dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_fgetxattr_stub(frame, default_fgetxattr_resume, fd, name, xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(fgetxattr, frame, -1, ENOMEM, 0, 0);
+ OB_POST_FD(fgetxattr, this, frame, fd, true, fd, name, xdata);
return 0;
}
-int
+static int32_t
ob_fremovexattr(call_frame_t *frame, xlator_t *this, fd_t *fd, const char *name,
dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_fremovexattr_stub(frame, default_fremovexattr_resume, fd, name,
- xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(fremovexattr, frame, -1, ENOMEM, 0);
+ OB_POST_FD(fremovexattr, this, frame, fd, true, fd, name, xdata);
return 0;
}
-int
+static int32_t
ob_finodelk(call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd,
int cmd, struct gf_flock *flock, dict_t *xdata)
{
- call_stub_t *stub = fop_finodelk_stub(frame, default_finodelk_resume,
- volume, fd, cmd, flock, xdata);
- if (stub)
- open_and_resume(this, fd, stub);
- else
- STACK_UNWIND_STRICT(finodelk, frame, -1, ENOMEM, 0);
+ OB_POST_FD(finodelk, this, frame, fd, true, volume, fd, cmd, flock, xdata);
return 0;
}
-int
+static int32_t
ob_fentrylk(call_frame_t *frame, xlator_t *this, const char *volume, fd_t *fd,
const char *basename, entrylk_cmd cmd, entrylk_type type,
dict_t *xdata)
{
- call_stub_t *stub = fop_fentrylk_stub(
- frame, default_fentrylk_resume, volume, fd, basename, cmd, type, xdata);
- if (stub)
- open_and_resume(this, fd, stub);
- else
- STACK_UNWIND_STRICT(fentrylk, frame, -1, ENOMEM, 0);
+ OB_POST_FD(fentrylk, this, frame, fd, true, volume, fd, basename, cmd, type,
+ xdata);
return 0;
}
-int
+static int32_t
ob_fxattrop(call_frame_t *frame, xlator_t *this, fd_t *fd,
gf_xattrop_flags_t optype, dict_t *xattr, dict_t *xdata)
{
- call_stub_t *stub = fop_fxattrop_stub(frame, default_fxattrop_resume, fd,
- optype, xattr, xdata);
- if (stub)
- open_and_resume(this, fd, stub);
- else
- STACK_UNWIND_STRICT(fxattrop, frame, -1, ENOMEM, 0, 0);
+ OB_POST_FD(fxattrop, this, frame, fd, true, fd, optype, xattr, xdata);
return 0;
}
-int
+static int32_t
ob_fsetattr(call_frame_t *frame, xlator_t *this, fd_t *fd, struct iatt *iatt,
int valid, dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_fsetattr_stub(frame, default_fsetattr_resume, fd, iatt, valid,
- xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(fsetattr, frame, -1, ENOMEM, 0, 0, 0);
+ OB_POST_FD(fsetattr, this, frame, fd, true, fd, iatt, valid, xdata);
return 0;
}
-int
+static int32_t
ob_fallocate(call_frame_t *frame, xlator_t *this, fd_t *fd, int32_t mode,
off_t offset, size_t len, dict_t *xdata)
{
- call_stub_t *stub;
-
- stub = fop_fallocate_stub(frame, default_fallocate_resume, fd, mode, offset,
- len, xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
+ OB_POST_FD(fallocate, this, frame, fd, true, fd, mode, offset, len, xdata);
return 0;
-err:
- STACK_UNWIND_STRICT(fallocate, frame, -1, ENOMEM, NULL, NULL, NULL);
- return 0;
}
-int
+static int32_t
ob_discard(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
size_t len, dict_t *xdata)
{
- call_stub_t *stub;
-
- stub = fop_discard_stub(frame, default_discard_resume, fd, offset, len,
- xdata);
- if (!stub)
- goto err;
-
- open_and_resume(this, fd, stub);
+ OB_POST_FD(discard, this, frame, fd, true, fd, offset, len, xdata);
return 0;
-err:
- STACK_UNWIND_STRICT(discard, frame, -1, ENOMEM, NULL, NULL, NULL);
- return 0;
}
-int
+static int32_t
ob_zerofill(call_frame_t *frame, xlator_t *this, fd_t *fd, off_t offset,
off_t len, dict_t *xdata)
{
- call_stub_t *stub;
-
- stub = fop_zerofill_stub(frame, default_zerofill_resume, fd, offset, len,
- xdata);
- if (!stub)
- goto err;
+ OB_POST_FD(zerofill, this, frame, fd, true, fd, offset, len, xdata);
- open_and_resume(this, fd, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(zerofill, frame, -1, ENOMEM, NULL, NULL, NULL);
return 0;
}
-int
+static int32_t
ob_unlink(call_frame_t *frame, xlator_t *this, loc_t *loc, int xflags,
dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_unlink_stub(frame, default_unlink_resume, loc, xflags, xdata);
- if (!stub)
- goto err;
-
- open_all_pending_fds_and_resume(this, loc->inode, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(unlink, frame, -1, ENOMEM, 0, 0, 0);
+ OB_POST_INODE(unlink, this, frame, loc->inode, true, loc, xflags, xdata);
return 0;
}
-int
+static int32_t
ob_rename(call_frame_t *frame, xlator_t *this, loc_t *src, loc_t *dst,
dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_rename_stub(frame, default_rename_resume, src, dst, xdata);
- if (!stub)
- goto err;
-
- open_all_pending_fds_and_resume(this, dst->inode, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(rename, frame, -1, ENOMEM, 0, 0, 0, 0, 0, 0);
+ OB_POST_INODE(rename, this, frame, dst->inode, true, src, dst, xdata);
return 0;
}
-int32_t
+static int32_t
ob_setattr(call_frame_t *frame, xlator_t *this, loc_t *loc, struct iatt *stbuf,
int32_t valid, dict_t *xdata)
{
- call_stub_t *stub = NULL;
-
- stub = fop_setattr_stub(frame, default_setattr_resume, loc, stbuf, valid,
- xdata);
- if (!stub)
- goto err;
+ OB_POST_INODE(setattr, this, frame, loc->inode, true, loc, stbuf, valid,
+ xdata);
- open_all_pending_fds_and_resume(this, loc->inode, stub);
-
- return 0;
-err:
- STACK_UNWIND_STRICT(setattr, frame, -1, ENOMEM, NULL, NULL, NULL);
return 0;
}
-int32_t
+static int32_t
ob_setxattr(call_frame_t *frame, xlator_t *this, loc_t *loc, dict_t *dict,
int32_t flags, dict_t *xdata)
{
- call_stub_t *stub = NULL;
- gf_boolean_t access_xattr = _gf_false;
-
if (dict_get(dict, POSIX_ACL_DEFAULT_XATTR) ||
dict_get(dict, POSIX_ACL_ACCESS_XATTR) ||
- dict_get(dict, GF_SELINUX_XATTR_KEY))
- access_xattr = _gf_true;
-
- if (!access_xattr)
+ dict_get(dict, GF_SELINUX_XATTR_KEY)) {
return default_setxattr(frame, this, loc, dict, flags, xdata);
+ }
- stub = fop_setxattr_stub(frame, default_setxattr_resume, loc, dict, flags,
- xdata);
- if (!stub)
- goto err;
-
- open_all_pending_fds_and_resume(this, loc->inode, stub);
+ OB_POST_INODE(setxattr, this, frame, loc->inode, true, loc, dict, flags,
+ xdata);
return 0;
-err:
- STACK_UNWIND_STRICT(setxattr, frame, -1, ENOMEM, NULL);
- return 0;
}
-int
-ob_release(xlator_t *this, fd_t *fd)
+static void
+ob_fdclose(xlator_t *this, fd_t *fd)
{
- ob_fd_t *ob_fd = NULL;
+ struct list_head list;
+ ob_inode_t *ob_inode;
+ call_stub_t *stub;
+
+ INIT_LIST_HEAD(&list);
+ stub = NULL;
- ob_fd = ob_fd_ctx_get(this, fd);
+ LOCK(&fd->inode->lock);
+ {
+ ob_inode = ob_inode_get_locked(this, fd->inode);
+ if (ob_inode != NULL) {
+ ob_inode->open_count--;
+
+ /* If this fd is the same as ob_inode->first_fd, it means that
+ * the initial open has not fully completed. We'll try to cancel
+ * it. */
+ if (ob_inode->first_fd == fd) {
+ if (ob_inode->first_open == OB_OPEN_PREPARING) {
+ /* In this case ob_open_dispatch() has not been called yet.
+ * We clear first_fd and first_open to allow that function
+ * to know that the open is not really needed. This also
+ * allows other requests to work as expected if they
+ * arrive before the dispatch function is called. If there
+ * are pending fops, we can directly process them here.
+ * (note that there shouldn't be any fd related fops, but
+ * if there are, it's fine if they fail). */
+ ob_inode->first_fd = NULL;
+ ob_inode->first_open = NULL;
+ ob_inode->triggered = false;
+ list_splice_init(&ob_inode->resume_fops, &list);
+ } else if (!ob_inode->triggered) {
+ /* If the open has already been dispatched, we can only
+ * cancel it if it has not been triggered. Otherwise we
+ * simply wait until it completes. While it's not triggered,
+ * first_open must be a valid stub and there can't be any
+ * pending fops. */
+ GF_ASSERT((ob_inode->first_open != NULL) &&
+ list_empty(&ob_inode->resume_fops));
+
+ ob_inode->first_fd = NULL;
+ stub = ob_inode->first_open;
+ ob_inode->first_open = NULL;
+ }
+ }
+ }
+ }
+ UNLOCK(&fd->inode->lock);
- ob_fd_free(ob_fd);
+ if (stub != NULL) {
+ call_stub_destroy(stub);
+ fd_unref(fd);
+ }
- return 0;
+ ob_resume_pending(&list);
}
int
ob_forget(xlator_t *this, inode_t *inode)
{
- ob_inode_t *ob_inode = NULL;
+ ob_inode_t *ob_inode;
uint64_t value = 0;
- inode_ctx_del(inode, this, &value);
-
- if (value) {
+ if ((inode_ctx_del(inode, this, &value) == 0) && (value != 0)) {
ob_inode = (ob_inode_t *)(uintptr_t)value;
- ob_inode_free(ob_inode);
+ GF_FREE(ob_inode);
}
return 0;
@@ -1153,20 +823,18 @@ ob_priv_dump(xlator_t *this)
int
ob_fdctx_dump(xlator_t *this, fd_t *fd)
{
- ob_fd_t *ob_fd = NULL;
char key_prefix[GF_DUMP_MAX_BUF_LEN] = {
0,
};
- int ret = 0;
+ uint64_t value = 0;
+ int ret = 0, error = 0;
ret = TRY_LOCK(&fd->lock);
if (ret)
return 0;
- ob_fd = __ob_fd_ctx_get(this, fd);
- if (!ob_fd) {
- UNLOCK(&fd->lock);
- return 0;
+ if ((__fd_ctx_get(fd, this, &value) == 0) && (value != 0)) {
+ error = (int32_t)value;
}
gf_proc_dump_build_key(key_prefix, "xlator.performance.open-behind",
@@ -1175,17 +843,7 @@ ob_fdctx_dump(xlator_t *this, fd_t *fd)
gf_proc_dump_write("fd", "%p", fd);
- gf_proc_dump_write("open_frame", "%p", ob_fd->open_frame);
-
- if (ob_fd->open_frame)
- gf_proc_dump_write("open_frame.root.unique", "%" PRIu64,
- ob_fd->open_frame->root->unique);
-
- gf_proc_dump_write("loc.path", "%s", ob_fd->loc.path);
-
- gf_proc_dump_write("loc.ino", "%s", uuid_utoa(ob_fd->loc.gfid));
-
- gf_proc_dump_write("flags", "%d", ob_fd->flags);
+ gf_proc_dump_write("error", "%d", error);
UNLOCK(&fd->lock);
@@ -1307,7 +965,7 @@ struct xlator_fops fops = {
};
struct xlator_cbks cbks = {
- .release = ob_release,
+ .fdclose = ob_fdclose,
.forget = ob_forget,
};
--
1.8.3.1
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