* See the COPYING file in the top-level directory.
*
*/
+#include "qemu/osdep.h"
#include <glusterfs/api/glfs.h>
#include "block/block_int.h"
+#include "qapi/error.h"
+#include "qapi/qmp/qerror.h"
#include "qemu/uri.h"
+#include "qemu/error-report.h"
+#include "qemu/cutils.h"
+
+#define GLUSTER_OPT_FILENAME "filename"
+#define GLUSTER_OPT_VOLUME "volume"
+#define GLUSTER_OPT_PATH "path"
+#define GLUSTER_OPT_TYPE "type"
+#define GLUSTER_OPT_SERVER_PATTERN "server."
+#define GLUSTER_OPT_HOST "host"
+#define GLUSTER_OPT_PORT "port"
+#define GLUSTER_OPT_TO "to"
+#define GLUSTER_OPT_IPV4 "ipv4"
+#define GLUSTER_OPT_IPV6 "ipv6"
+#define GLUSTER_OPT_SOCKET "socket"
+#define GLUSTER_OPT_DEBUG "debug"
+#define GLUSTER_DEFAULT_PORT 24007
+#define GLUSTER_DEBUG_DEFAULT 4
+#define GLUSTER_DEBUG_MAX 9
+#define GLUSTER_OPT_LOGFILE "logfile"
+#define GLUSTER_LOGFILE_DEFAULT "-" /* handled in libgfapi as /dev/stderr */
+
+#define GERR_INDEX_HINT "hint: check in 'server' array index '%d'\n"
typedef struct GlusterAIOCB {
int64_t size;
int ret;
- QEMUBH *bh;
Coroutine *coroutine;
AioContext *aio_context;
} GlusterAIOCB;
typedef struct BDRVGlusterState {
struct glfs *glfs;
struct glfs_fd *fd;
+ char *logfile;
+ bool supports_seek_data;
+ int debug_level;
} BDRVGlusterState;
-typedef struct GlusterConf {
- char *server;
- int port;
- char *volname;
- char *image;
- char *transport;
-} GlusterConf;
+typedef struct BDRVGlusterReopenState {
+ struct glfs *glfs;
+ struct glfs_fd *fd;
+} BDRVGlusterReopenState;
+
+
+typedef struct GlfsPreopened {
+ char *volume;
+ glfs_t *fs;
+ int ref;
+} GlfsPreopened;
+
+typedef struct ListElement {
+ QLIST_ENTRY(ListElement) list;
+ GlfsPreopened saved;
+} ListElement;
+
+static QLIST_HEAD(glfs_list, ListElement) glfs_list;
+
+static QemuOptsList qemu_gluster_create_opts = {
+ .name = "qemu-gluster-create-opts",
+ .head = QTAILQ_HEAD_INITIALIZER(qemu_gluster_create_opts.head),
+ .desc = {
+ {
+ .name = BLOCK_OPT_SIZE,
+ .type = QEMU_OPT_SIZE,
+ .help = "Virtual disk size"
+ },
+ {
+ .name = BLOCK_OPT_PREALLOC,
+ .type = QEMU_OPT_STRING,
+ .help = "Preallocation mode (allowed values: off, full)"
+ },
+ {
+ .name = GLUSTER_OPT_DEBUG,
+ .type = QEMU_OPT_NUMBER,
+ .help = "Gluster log level, valid range is 0-9",
+ },
+ {
+ .name = GLUSTER_OPT_LOGFILE,
+ .type = QEMU_OPT_STRING,
+ .help = "Logfile path of libgfapi",
+ },
+ { /* end of list */ }
+ }
+};
+
+static QemuOptsList runtime_opts = {
+ .name = "gluster",
+ .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
+ .desc = {
+ {
+ .name = GLUSTER_OPT_FILENAME,
+ .type = QEMU_OPT_STRING,
+ .help = "URL to the gluster image",
+ },
+ {
+ .name = GLUSTER_OPT_DEBUG,
+ .type = QEMU_OPT_NUMBER,
+ .help = "Gluster log level, valid range is 0-9",
+ },
+ {
+ .name = GLUSTER_OPT_LOGFILE,
+ .type = QEMU_OPT_STRING,
+ .help = "Logfile path of libgfapi",
+ },
+ { /* end of list */ }
+ },
+};
+
+static QemuOptsList runtime_json_opts = {
+ .name = "gluster_json",
+ .head = QTAILQ_HEAD_INITIALIZER(runtime_json_opts.head),
+ .desc = {
+ {
+ .name = GLUSTER_OPT_VOLUME,
+ .type = QEMU_OPT_STRING,
+ .help = "name of gluster volume where VM image resides",
+ },
+ {
+ .name = GLUSTER_OPT_PATH,
+ .type = QEMU_OPT_STRING,
+ .help = "absolute path to image file in gluster volume",
+ },
+ {
+ .name = GLUSTER_OPT_DEBUG,
+ .type = QEMU_OPT_NUMBER,
+ .help = "Gluster log level, valid range is 0-9",
+ },
+ { /* end of list */ }
+ },
+};
+
+static QemuOptsList runtime_type_opts = {
+ .name = "gluster_type",
+ .head = QTAILQ_HEAD_INITIALIZER(runtime_type_opts.head),
+ .desc = {
+ {
+ .name = GLUSTER_OPT_TYPE,
+ .type = QEMU_OPT_STRING,
+ .help = "tcp|unix",
+ },
+ { /* end of list */ }
+ },
+};
+
+static QemuOptsList runtime_unix_opts = {
+ .name = "gluster_unix",
+ .head = QTAILQ_HEAD_INITIALIZER(runtime_unix_opts.head),
+ .desc = {
+ {
+ .name = GLUSTER_OPT_SOCKET,
+ .type = QEMU_OPT_STRING,
+ .help = "socket file path)",
+ },
+ { /* end of list */ }
+ },
+};
+
+static QemuOptsList runtime_tcp_opts = {
+ .name = "gluster_tcp",
+ .head = QTAILQ_HEAD_INITIALIZER(runtime_tcp_opts.head),
+ .desc = {
+ {
+ .name = GLUSTER_OPT_TYPE,
+ .type = QEMU_OPT_STRING,
+ .help = "tcp|unix",
+ },
+ {
+ .name = GLUSTER_OPT_HOST,
+ .type = QEMU_OPT_STRING,
+ .help = "host address (hostname/ipv4/ipv6 addresses)",
+ },
+ {
+ .name = GLUSTER_OPT_PORT,
+ .type = QEMU_OPT_STRING,
+ .help = "port number on which glusterd is listening (default 24007)",
+ },
+ {
+ .name = "to",
+ .type = QEMU_OPT_NUMBER,
+ .help = "max port number, not supported by gluster",
+ },
+ {
+ .name = "ipv4",
+ .type = QEMU_OPT_BOOL,
+ .help = "ipv4 bool value, not supported by gluster",
+ },
+ {
+ .name = "ipv6",
+ .type = QEMU_OPT_BOOL,
+ .help = "ipv6 bool value, not supported by gluster",
+ },
+ { /* end of list */ }
+ },
+};
+
+static void glfs_set_preopened(const char *volume, glfs_t *fs)
+{
+ ListElement *entry = NULL;
+
+ entry = g_new(ListElement, 1);
+
+ entry->saved.volume = g_strdup(volume);
+
+ entry->saved.fs = fs;
+ entry->saved.ref = 1;
+
+ QLIST_INSERT_HEAD(&glfs_list, entry, list);
+}
+
+static glfs_t *glfs_find_preopened(const char *volume)
+{
+ ListElement *entry = NULL;
+
+ QLIST_FOREACH(entry, &glfs_list, list) {
+ if (strcmp(entry->saved.volume, volume) == 0) {
+ entry->saved.ref++;
+ return entry->saved.fs;
+ }
+ }
-static void qemu_gluster_gconf_free(GlusterConf *gconf)
+ return NULL;
+}
+
+static void glfs_clear_preopened(glfs_t *fs)
{
- if (gconf) {
- g_free(gconf->server);
- g_free(gconf->volname);
- g_free(gconf->image);
- g_free(gconf->transport);
- g_free(gconf);
+ ListElement *entry = NULL;
+
+ if (fs == NULL) {
+ return;
+ }
+
+ QLIST_FOREACH(entry, &glfs_list, list) {
+ if (entry->saved.fs == fs) {
+ if (--entry->saved.ref) {
+ return;
+ }
+
+ QLIST_REMOVE(entry, list);
+
+ glfs_fini(entry->saved.fs);
+ g_free(entry->saved.volume);
+ g_free(entry);
+ }
}
}
-static int parse_volume_options(GlusterConf *gconf, char *path)
+static int parse_volume_options(BlockdevOptionsGluster *gconf, char *path)
{
char *p, *q;
if (*p == '\0') {
return -EINVAL;
}
- gconf->volname = g_strndup(q, p - q);
+ gconf->volume = g_strndup(q, p - q);
- /* image */
+ /* path */
p += strspn(p, "/");
if (*p == '\0') {
return -EINVAL;
}
- gconf->image = g_strdup(p);
+ gconf->path = g_strdup(p);
return 0;
}
/*
- * file=gluster[+transport]://[server[:port]]/volname/image[?socket=...]
+ * file=gluster[+transport]://[host[:port]]/volume/path[?socket=...]
*
* 'gluster' is the protocol.
*
* 'transport' specifies the transport type used to connect to gluster
* management daemon (glusterd). Valid transport types are
- * tcp, unix and rdma. If a transport type isn't specified, then tcp
- * type is assumed.
+ * tcp or unix. If a transport type isn't specified, then tcp type is assumed.
*
- * 'server' specifies the server where the volume file specification for
- * the given volume resides. This can be either hostname, ipv4 address
- * or ipv6 address. ipv6 address needs to be within square brackets [ ].
- * If transport type is 'unix', then 'server' field should not be specified.
+ * 'host' specifies the host where the volume file specification for
+ * the given volume resides. This can be either hostname or ipv4 address.
+ * If transport type is 'unix', then 'host' field should not be specified.
* The 'socket' field needs to be populated with the path to unix domain
* socket.
*
* default port. If the transport type is unix, then 'port' should not be
* specified.
*
- * 'volname' is the name of the gluster volume which contains the VM image.
+ * 'volume' is the name of the gluster volume which contains the VM image.
*
- * 'image' is the path to the actual VM image that resides on gluster volume.
+ * 'path' is the path to the actual VM image that resides on gluster volume.
*
* Examples:
*
* file=gluster://1.2.3.4/testvol/a.img
* file=gluster+tcp://1.2.3.4/testvol/a.img
* file=gluster+tcp://1.2.3.4:24007/testvol/dir/a.img
- * file=gluster+tcp://[1:2:3:4:5:6:7:8]/testvol/dir/a.img
- * file=gluster+tcp://[1:2:3:4:5:6:7:8]:24007/testvol/dir/a.img
- * file=gluster+tcp://server.domain.com:24007/testvol/dir/a.img
+ * file=gluster+tcp://host.domain.com:24007/testvol/dir/a.img
* file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket
- * file=gluster+rdma://1.2.3.4:24007/testvol/a.img
*/
-static int qemu_gluster_parseuri(GlusterConf *gconf, const char *filename)
+static int qemu_gluster_parse_uri(BlockdevOptionsGluster *gconf,
+ const char *filename)
{
+ GlusterServer *gsconf;
URI *uri;
QueryParams *qp = NULL;
bool is_unix = false;
return -EINVAL;
}
+ gconf->server = g_new0(GlusterServerList, 1);
+ gconf->server->value = gsconf = g_new0(GlusterServer, 1);
+
/* transport */
if (!uri->scheme || !strcmp(uri->scheme, "gluster")) {
- gconf->transport = g_strdup("tcp");
+ gsconf->type = GLUSTER_TRANSPORT_TCP;
} else if (!strcmp(uri->scheme, "gluster+tcp")) {
- gconf->transport = g_strdup("tcp");
+ gsconf->type = GLUSTER_TRANSPORT_TCP;
} else if (!strcmp(uri->scheme, "gluster+unix")) {
- gconf->transport = g_strdup("unix");
+ gsconf->type = GLUSTER_TRANSPORT_UNIX;
is_unix = true;
} else if (!strcmp(uri->scheme, "gluster+rdma")) {
- gconf->transport = g_strdup("rdma");
+ gsconf->type = GLUSTER_TRANSPORT_TCP;
+ error_report("Warning: rdma feature is not supported, falling "
+ "back to tcp");
} else {
ret = -EINVAL;
goto out;
ret = -EINVAL;
goto out;
}
- gconf->server = g_strdup(qp->p[0].value);
+ gsconf->u.q_unix.path = g_strdup(qp->p[0].value);
} else {
- gconf->server = g_strdup(uri->server ? uri->server : "localhost");
- gconf->port = uri->port;
+ gsconf->u.tcp.host = g_strdup(uri->server ? uri->server : "localhost");
+ if (uri->port) {
+ gsconf->u.tcp.port = g_strdup_printf("%d", uri->port);
+ } else {
+ gsconf->u.tcp.port = g_strdup_printf("%d", GLUSTER_DEFAULT_PORT);
+ }
}
out:
return ret;
}
-static struct glfs *qemu_gluster_init(GlusterConf *gconf, const char *filename,
- Error **errp)
+static struct glfs *qemu_gluster_glfs_init(BlockdevOptionsGluster *gconf,
+ Error **errp)
{
- struct glfs *glfs = NULL;
+ struct glfs *glfs;
int ret;
int old_errno;
+ GlusterServerList *server;
+ unsigned long long port;
- ret = qemu_gluster_parseuri(gconf, filename);
- if (ret < 0) {
- error_setg(errp, "Usage: file=gluster[+transport]://[server[:port]]/"
- "volname/image[?socket=...]");
- errno = -ret;
- goto out;
+ glfs = glfs_find_preopened(gconf->volume);
+ if (glfs) {
+ return glfs;
}
- glfs = glfs_new(gconf->volname);
+ glfs = glfs_new(gconf->volume);
if (!glfs) {
goto out;
}
- ret = glfs_set_volfile_server(glfs, gconf->transport, gconf->server,
- gconf->port);
- if (ret < 0) {
- goto out;
+ glfs_set_preopened(gconf->volume, glfs);
+
+ for (server = gconf->server; server; server = server->next) {
+ if (server->value->type == GLUSTER_TRANSPORT_UNIX) {
+ ret = glfs_set_volfile_server(glfs,
+ GlusterTransport_lookup[server->value->type],
+ server->value->u.q_unix.path, 0);
+ } else {
+ if (parse_uint_full(server->value->u.tcp.port, &port, 10) < 0 ||
+ port > 65535) {
+ error_setg(errp, "'%s' is not a valid port number",
+ server->value->u.tcp.port);
+ errno = EINVAL;
+ goto out;
+ }
+ ret = glfs_set_volfile_server(glfs,
+ GlusterTransport_lookup[server->value->type],
+ server->value->u.tcp.host,
+ (int)port);
+ }
+
+ if (ret < 0) {
+ goto out;
+ }
}
- /*
- * TODO: Use GF_LOG_ERROR instead of hard code value of 4 here when
- * GlusterFS makes GF_LOG_* macros available to libgfapi users.
- */
- ret = glfs_set_logging(glfs, "-", 4);
+ ret = glfs_set_logging(glfs, gconf->logfile, gconf->debug_level);
if (ret < 0) {
goto out;
}
ret = glfs_init(glfs);
if (ret) {
- error_setg_errno(errp, errno,
- "Gluster connection failed for server=%s port=%d "
- "volume=%s image=%s transport=%s", gconf->server,
- gconf->port, gconf->volname, gconf->image,
- gconf->transport);
+ error_setg(errp, "Gluster connection for volume %s, path %s failed"
+ " to connect", gconf->volume, gconf->path);
+ for (server = gconf->server; server; server = server->next) {
+ if (server->value->type == GLUSTER_TRANSPORT_UNIX) {
+ error_append_hint(errp, "hint: failed on socket %s ",
+ server->value->u.q_unix.path);
+ } else {
+ error_append_hint(errp, "hint: failed on host %s and port %s ",
+ server->value->u.tcp.host,
+ server->value->u.tcp.port);
+ }
+ }
+
+ error_append_hint(errp, "Please refer to gluster logs for more info\n");
/* glfs_init sometimes doesn't set errno although docs suggest that */
- if (errno == 0)
+ if (errno == 0) {
errno = EINVAL;
+ }
goto out;
}
out:
if (glfs) {
old_errno = errno;
- glfs_fini(glfs);
+ glfs_clear_preopened(glfs);
errno = old_errno;
}
return NULL;
}
+static int qapi_enum_parse(const char *opt)
+{
+ int i;
+
+ if (!opt) {
+ return GLUSTER_TRANSPORT__MAX;
+ }
+
+ for (i = 0; i < GLUSTER_TRANSPORT__MAX; i++) {
+ if (!strcmp(opt, GlusterTransport_lookup[i])) {
+ return i;
+ }
+ }
+
+ return i;
+}
+
+/*
+ * Convert the json formatted command line into qapi.
+*/
+static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf,
+ QDict *options, Error **errp)
+{
+ QemuOpts *opts;
+ GlusterServer *gsconf;
+ GlusterServerList *curr = NULL;
+ QDict *backing_options = NULL;
+ Error *local_err = NULL;
+ char *str = NULL;
+ const char *ptr;
+ size_t num_servers;
+ int i;
+
+ /* create opts info from runtime_json_opts list */
+ opts = qemu_opts_create(&runtime_json_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, options, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ num_servers = qdict_array_entries(options, GLUSTER_OPT_SERVER_PATTERN);
+ if (num_servers < 1) {
+ error_setg(&local_err, QERR_MISSING_PARAMETER, "server");
+ goto out;
+ }
+
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_VOLUME);
+ if (!ptr) {
+ error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_VOLUME);
+ goto out;
+ }
+ gconf->volume = g_strdup(ptr);
+
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_PATH);
+ if (!ptr) {
+ error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_PATH);
+ goto out;
+ }
+ gconf->path = g_strdup(ptr);
+ qemu_opts_del(opts);
+
+ for (i = 0; i < num_servers; i++) {
+ str = g_strdup_printf(GLUSTER_OPT_SERVER_PATTERN"%d.", i);
+ qdict_extract_subqdict(options, &backing_options, str);
+
+ /* create opts info from runtime_type_opts list */
+ opts = qemu_opts_create(&runtime_type_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, backing_options, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_TYPE);
+ gsconf = g_new0(GlusterServer, 1);
+ gsconf->type = qapi_enum_parse(ptr);
+ if (!ptr) {
+ error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_TYPE);
+ error_append_hint(&local_err, GERR_INDEX_HINT, i);
+ goto out;
+
+ }
+ if (gsconf->type == GLUSTER_TRANSPORT__MAX) {
+ error_setg(&local_err, QERR_INVALID_PARAMETER_VALUE,
+ GLUSTER_OPT_TYPE, "tcp or unix");
+ error_append_hint(&local_err, GERR_INDEX_HINT, i);
+ goto out;
+ }
+ qemu_opts_del(opts);
+
+ if (gsconf->type == GLUSTER_TRANSPORT_TCP) {
+ /* create opts info from runtime_tcp_opts list */
+ opts = qemu_opts_create(&runtime_tcp_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, backing_options, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_HOST);
+ if (!ptr) {
+ error_setg(&local_err, QERR_MISSING_PARAMETER,
+ GLUSTER_OPT_HOST);
+ error_append_hint(&local_err, GERR_INDEX_HINT, i);
+ goto out;
+ }
+ gsconf->u.tcp.host = g_strdup(ptr);
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_PORT);
+ if (!ptr) {
+ error_setg(&local_err, QERR_MISSING_PARAMETER,
+ GLUSTER_OPT_PORT);
+ error_append_hint(&local_err, GERR_INDEX_HINT, i);
+ goto out;
+ }
+ gsconf->u.tcp.port = g_strdup(ptr);
+
+ /* defend for unsupported fields in InetSocketAddress,
+ * i.e. @ipv4, @ipv6 and @to
+ */
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_TO);
+ if (ptr) {
+ gsconf->u.tcp.has_to = true;
+ }
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV4);
+ if (ptr) {
+ gsconf->u.tcp.has_ipv4 = true;
+ }
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV6);
+ if (ptr) {
+ gsconf->u.tcp.has_ipv6 = true;
+ }
+ if (gsconf->u.tcp.has_to) {
+ error_setg(&local_err, "Parameter 'to' not supported");
+ goto out;
+ }
+ if (gsconf->u.tcp.has_ipv4 || gsconf->u.tcp.has_ipv6) {
+ error_setg(&local_err, "Parameters 'ipv4/ipv6' not supported");
+ goto out;
+ }
+ qemu_opts_del(opts);
+ } else {
+ /* create opts info from runtime_unix_opts list */
+ opts = qemu_opts_create(&runtime_unix_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, backing_options, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ ptr = qemu_opt_get(opts, GLUSTER_OPT_SOCKET);
+ if (!ptr) {
+ error_setg(&local_err, QERR_MISSING_PARAMETER,
+ GLUSTER_OPT_SOCKET);
+ error_append_hint(&local_err, GERR_INDEX_HINT, i);
+ goto out;
+ }
+ gsconf->u.q_unix.path = g_strdup(ptr);
+ qemu_opts_del(opts);
+ }
+
+ if (gconf->server == NULL) {
+ gconf->server = g_new0(GlusterServerList, 1);
+ gconf->server->value = gsconf;
+ curr = gconf->server;
+ } else {
+ curr->next = g_new0(GlusterServerList, 1);
+ curr->next->value = gsconf;
+ curr = curr->next;
+ }
+
+ qdict_del(backing_options, str);
+ g_free(str);
+ str = NULL;
+ }
+
+ return 0;
+
+out:
+ error_propagate(errp, local_err);
+ qemu_opts_del(opts);
+ if (str) {
+ qdict_del(backing_options, str);
+ g_free(str);
+ }
+ errno = EINVAL;
+ return -errno;
+}
+
+static struct glfs *qemu_gluster_init(BlockdevOptionsGluster *gconf,
+ const char *filename,
+ QDict *options, Error **errp)
+{
+ int ret;
+ if (filename) {
+ ret = qemu_gluster_parse_uri(gconf, filename);
+ if (ret < 0) {
+ error_setg(errp, "invalid URI");
+ error_append_hint(errp, "Usage: file=gluster[+transport]://"
+ "[host[:port]]volume/path[?socket=...]"
+ "[,file.debug=N]"
+ "[,file.logfile=/path/filename.log]\n");
+ errno = -ret;
+ return NULL;
+ }
+ } else {
+ ret = qemu_gluster_parse_json(gconf, options, errp);
+ if (ret < 0) {
+ error_append_hint(errp, "Usage: "
+ "-drive driver=qcow2,file.driver=gluster,"
+ "file.volume=testvol,file.path=/path/a.qcow2"
+ "[,file.debug=9]"
+ "[,file.logfile=/path/filename.log],"
+ "file.server.0.type=tcp,"
+ "file.server.0.host=1.2.3.4,"
+ "file.server.0.port=24007,"
+ "file.server.1.transport=unix,"
+ "file.server.1.socket=/var/run/glusterd.socket ..."
+ "\n");
+ errno = -ret;
+ return NULL;
+ }
+
+ }
+
+ return qemu_gluster_glfs_init(gconf, errp);
+}
+
static void qemu_gluster_complete_aio(void *opaque)
{
GlusterAIOCB *acb = (GlusterAIOCB *)opaque;
- qemu_bh_delete(acb->bh);
- acb->bh = NULL;
- qemu_coroutine_enter(acb->coroutine, NULL);
+ qemu_coroutine_enter(acb->coroutine);
}
/*
if (!ret || ret == acb->size) {
acb->ret = 0; /* Success */
} else if (ret < 0) {
- acb->ret = ret; /* Read/Write failed */
+ acb->ret = -errno; /* Read/Write failed */
} else {
acb->ret = -EIO; /* Partial read/write - fail it */
}
- acb->bh = aio_bh_new(acb->aio_context, qemu_gluster_complete_aio, acb);
- qemu_bh_schedule(acb->bh);
+ aio_bh_schedule_oneshot(acb->aio_context, qemu_gluster_complete_aio, acb);
}
-/* TODO Convert to fine grained options */
-static QemuOptsList runtime_opts = {
- .name = "gluster",
- .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
- .desc = {
- {
- .name = "filename",
- .type = QEMU_OPT_STRING,
- .help = "URL to the gluster image",
- },
- { /* end of list */ }
- },
-};
-
static void qemu_gluster_parse_flags(int bdrv_flags, int *open_flags)
{
assert(open_flags != NULL);
}
}
+/*
+ * Do SEEK_DATA/HOLE to detect if it is functional. Older broken versions of
+ * gfapi incorrectly return the current offset when SEEK_DATA/HOLE is used.
+ * - Corrected versions return -1 and set errno to EINVAL.
+ * - Versions that support SEEK_DATA/HOLE correctly, will return -1 and set
+ * errno to ENXIO when SEEK_DATA is called with a position of EOF.
+ */
+static bool qemu_gluster_test_seek(struct glfs_fd *fd)
+{
+ off_t ret = 0;
+
+#if defined SEEK_HOLE && defined SEEK_DATA
+ off_t eof;
+
+ eof = glfs_lseek(fd, 0, SEEK_END);
+ if (eof < 0) {
+ /* this should never occur */
+ return false;
+ }
+
+ /* this should always fail with ENXIO if SEEK_DATA is supported */
+ ret = glfs_lseek(fd, eof, SEEK_DATA);
+#endif
+
+ return (ret < 0) && (errno == ENXIO);
+}
+
static int qemu_gluster_open(BlockDriverState *bs, QDict *options,
int bdrv_flags, Error **errp)
{
BDRVGlusterState *s = bs->opaque;
int open_flags = 0;
int ret = 0;
- GlusterConf *gconf = g_new0(GlusterConf, 1);
+ BlockdevOptionsGluster *gconf = NULL;
QemuOpts *opts;
Error *local_err = NULL;
- const char *filename;
+ const char *filename, *logfile;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
goto out;
}
- filename = qemu_opt_get(opts, "filename");
+ filename = qemu_opt_get(opts, GLUSTER_OPT_FILENAME);
+
+ s->debug_level = qemu_opt_get_number(opts, GLUSTER_OPT_DEBUG,
+ GLUSTER_DEBUG_DEFAULT);
+ if (s->debug_level < 0) {
+ s->debug_level = 0;
+ } else if (s->debug_level > GLUSTER_DEBUG_MAX) {
+ s->debug_level = GLUSTER_DEBUG_MAX;
+ }
+
+ gconf = g_new0(BlockdevOptionsGluster, 1);
+ gconf->debug_level = s->debug_level;
+ gconf->has_debug_level = true;
+
+ logfile = qemu_opt_get(opts, GLUSTER_OPT_LOGFILE);
+ s->logfile = g_strdup(logfile ? logfile : GLUSTER_LOGFILE_DEFAULT);
- s->glfs = qemu_gluster_init(gconf, filename, errp);
+ gconf->logfile = g_strdup(s->logfile);
+ gconf->has_logfile = true;
+
+ s->glfs = qemu_gluster_init(gconf, filename, options, errp);
if (!s->glfs) {
ret = -errno;
goto out;
}
+#ifdef CONFIG_GLUSTERFS_XLATOR_OPT
+ /* Without this, if fsync fails for a recoverable reason (for instance,
+ * ENOSPC), gluster will dump its cache, preventing retries. This means
+ * almost certain data loss. Not all gluster versions support the
+ * 'resync-failed-syncs-after-fsync' key value, but there is no way to
+ * discover during runtime if it is supported (this api returns success for
+ * unknown key/value pairs) */
+ ret = glfs_set_xlator_option(s->glfs, "*-write-behind",
+ "resync-failed-syncs-after-fsync",
+ "on");
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "Unable to set xlator key/value pair");
+ ret = -errno;
+ goto out;
+ }
+#endif
+
qemu_gluster_parse_flags(bdrv_flags, &open_flags);
- s->fd = glfs_open(s->glfs, gconf->image, open_flags);
+ s->fd = glfs_open(s->glfs, gconf->path, open_flags);
if (!s->fd) {
ret = -errno;
}
+ s->supports_seek_data = qemu_gluster_test_seek(s->fd);
+
out:
qemu_opts_del(opts);
- qemu_gluster_gconf_free(gconf);
+ qapi_free_BlockdevOptionsGluster(gconf);
if (!ret) {
return ret;
}
+ g_free(s->logfile);
if (s->fd) {
glfs_close(s->fd);
}
- if (s->glfs) {
- glfs_fini(s->glfs);
- }
- return ret;
-}
-typedef struct BDRVGlusterReopenState {
- struct glfs *glfs;
- struct glfs_fd *fd;
-} BDRVGlusterReopenState;
+ glfs_clear_preopened(s->glfs);
+ return ret;
+}
static int qemu_gluster_reopen_prepare(BDRVReopenState *state,
BlockReopenQueue *queue, Error **errp)
{
int ret = 0;
+ BDRVGlusterState *s;
BDRVGlusterReopenState *reop_s;
- GlusterConf *gconf = NULL;
+ BlockdevOptionsGluster *gconf;
int open_flags = 0;
assert(state != NULL);
assert(state->bs != NULL);
+ s = state->bs->opaque;
+
state->opaque = g_new0(BDRVGlusterReopenState, 1);
reop_s = state->opaque;
qemu_gluster_parse_flags(state->flags, &open_flags);
- gconf = g_new0(GlusterConf, 1);
-
- reop_s->glfs = qemu_gluster_init(gconf, state->bs->filename, errp);
+ gconf = g_new0(BlockdevOptionsGluster, 1);
+ gconf->debug_level = s->debug_level;
+ gconf->has_debug_level = true;
+ gconf->logfile = g_strdup(s->logfile);
+ gconf->has_logfile = true;
+ reop_s->glfs = qemu_gluster_init(gconf, state->bs->filename, NULL, errp);
if (reop_s->glfs == NULL) {
ret = -errno;
goto exit;
}
- reop_s->fd = glfs_open(reop_s->glfs, gconf->image, open_flags);
+#ifdef CONFIG_GLUSTERFS_XLATOR_OPT
+ ret = glfs_set_xlator_option(reop_s->glfs, "*-write-behind",
+ "resync-failed-syncs-after-fsync", "on");
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "Unable to set xlator key/value pair");
+ ret = -errno;
+ goto exit;
+ }
+#endif
+
+ reop_s->fd = glfs_open(reop_s->glfs, gconf->path, open_flags);
if (reop_s->fd == NULL) {
/* reops->glfs will be cleaned up in _abort */
ret = -errno;
exit:
/* state->opaque will be freed in either the _abort or _commit */
- qemu_gluster_gconf_free(gconf);
+ qapi_free_BlockdevOptionsGluster(gconf);
return ret;
}
if (s->fd) {
glfs_close(s->fd);
}
- if (s->glfs) {
- glfs_fini(s->glfs);
- }
+
+ glfs_clear_preopened(s->glfs);
/* use the newly opened image / connection */
s->fd = reop_s->fd;
glfs_close(reop_s->fd);
}
- if (reop_s->glfs) {
- glfs_fini(reop_s->glfs);
- }
+ glfs_clear_preopened(reop_s->glfs);
g_free(state->opaque);
state->opaque = NULL;
}
#ifdef CONFIG_GLUSTERFS_ZEROFILL
-static coroutine_fn int qemu_gluster_co_write_zeroes(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, BdrvRequestFlags flags)
+static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs,
+ int64_t offset,
+ int size,
+ BdrvRequestFlags flags)
{
int ret;
- GlusterAIOCB *acb = g_slice_new(GlusterAIOCB);
+ GlusterAIOCB acb;
BDRVGlusterState *s = bs->opaque;
- off_t size = nb_sectors * BDRV_SECTOR_SIZE;
- off_t offset = sector_num * BDRV_SECTOR_SIZE;
- acb->size = size;
- acb->ret = 0;
- acb->coroutine = qemu_coroutine_self();
- acb->aio_context = bdrv_get_aio_context(bs);
+ acb.size = size;
+ acb.ret = 0;
+ acb.coroutine = qemu_coroutine_self();
+ acb.aio_context = bdrv_get_aio_context(bs);
- ret = glfs_zerofill_async(s->fd, offset, size, &gluster_finish_aiocb, acb);
+ ret = glfs_zerofill_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
if (ret < 0) {
- ret = -errno;
- goto out;
+ return -errno;
}
qemu_coroutine_yield();
- ret = acb->ret;
-
-out:
- g_slice_free(GlusterAIOCB, acb);
- return ret;
+ return acb.ret;
}
static inline bool gluster_supports_zerofill(void)
}
static inline int qemu_gluster_zerofill(struct glfs_fd *fd, int64_t offset,
- int64_t size)
+ int64_t size)
{
return glfs_zerofill(fd, offset, size);
}
}
static inline int qemu_gluster_zerofill(struct glfs_fd *fd, int64_t offset,
- int64_t size)
+ int64_t size)
{
return 0;
}
static int qemu_gluster_create(const char *filename,
QemuOpts *opts, Error **errp)
{
+ BlockdevOptionsGluster *gconf;
struct glfs *glfs;
struct glfs_fd *fd;
int ret = 0;
int prealloc = 0;
int64_t total_size = 0;
char *tmp = NULL;
- GlusterConf *gconf = g_new0(GlusterConf, 1);
- glfs = qemu_gluster_init(gconf, filename, errp);
+ gconf = g_new0(BlockdevOptionsGluster, 1);
+ gconf->debug_level = qemu_opt_get_number_del(opts, GLUSTER_OPT_DEBUG,
+ GLUSTER_DEBUG_DEFAULT);
+ if (gconf->debug_level < 0) {
+ gconf->debug_level = 0;
+ } else if (gconf->debug_level > GLUSTER_DEBUG_MAX) {
+ gconf->debug_level = GLUSTER_DEBUG_MAX;
+ }
+ gconf->has_debug_level = true;
+
+ gconf->logfile = qemu_opt_get_del(opts, GLUSTER_OPT_LOGFILE);
+ if (!gconf->logfile) {
+ gconf->logfile = g_strdup(GLUSTER_LOGFILE_DEFAULT);
+ }
+ gconf->has_logfile = true;
+
+ glfs = qemu_gluster_init(gconf, filename, NULL, errp);
if (!glfs) {
ret = -errno;
goto out;
}
- total_size = DIV_ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
- BDRV_SECTOR_SIZE);
+ total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
+ BDRV_SECTOR_SIZE);
tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
if (!tmp || !strcmp(tmp, "off")) {
prealloc = 0;
- } else if (!strcmp(tmp, "full") &&
- gluster_supports_zerofill()) {
+ } else if (!strcmp(tmp, "full") && gluster_supports_zerofill()) {
prealloc = 1;
} else {
error_setg(errp, "Invalid preallocation mode: '%s'"
- " or GlusterFS doesn't support zerofill API",
- tmp);
+ " or GlusterFS doesn't support zerofill API", tmp);
ret = -EINVAL;
goto out;
}
- fd = glfs_creat(glfs, gconf->image,
- O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR);
+ fd = glfs_creat(glfs, gconf->path,
+ O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR);
if (!fd) {
ret = -errno;
} else {
- if (!glfs_ftruncate(fd, total_size * BDRV_SECTOR_SIZE)) {
- if (prealloc && qemu_gluster_zerofill(fd, 0,
- total_size * BDRV_SECTOR_SIZE)) {
+ if (!glfs_ftruncate(fd, total_size)) {
+ if (prealloc && qemu_gluster_zerofill(fd, 0, total_size)) {
ret = -errno;
}
} else {
}
out:
g_free(tmp);
- qemu_gluster_gconf_free(gconf);
- if (glfs) {
- glfs_fini(glfs);
- }
+ qapi_free_BlockdevOptionsGluster(gconf);
+ glfs_clear_preopened(glfs);
return ret;
}
static coroutine_fn int qemu_gluster_co_rw(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, QEMUIOVector *qiov, int write)
+ int64_t sector_num, int nb_sectors,
+ QEMUIOVector *qiov, int write)
{
int ret;
- GlusterAIOCB *acb = g_slice_new(GlusterAIOCB);
+ GlusterAIOCB acb;
BDRVGlusterState *s = bs->opaque;
size_t size = nb_sectors * BDRV_SECTOR_SIZE;
off_t offset = sector_num * BDRV_SECTOR_SIZE;
- acb->size = size;
- acb->ret = 0;
- acb->coroutine = qemu_coroutine_self();
- acb->aio_context = bdrv_get_aio_context(bs);
+ acb.size = size;
+ acb.ret = 0;
+ acb.coroutine = qemu_coroutine_self();
+ acb.aio_context = bdrv_get_aio_context(bs);
if (write) {
ret = glfs_pwritev_async(s->fd, qiov->iov, qiov->niov, offset, 0,
- &gluster_finish_aiocb, acb);
+ gluster_finish_aiocb, &acb);
} else {
ret = glfs_preadv_async(s->fd, qiov->iov, qiov->niov, offset, 0,
- &gluster_finish_aiocb, acb);
+ gluster_finish_aiocb, &acb);
}
if (ret < 0) {
- ret = -errno;
- goto out;
+ return -errno;
}
qemu_coroutine_yield();
- ret = acb->ret;
-
-out:
- g_slice_free(GlusterAIOCB, acb);
- return ret;
+ return acb.ret;
}
static int qemu_gluster_truncate(BlockDriverState *bs, int64_t offset)
}
static coroutine_fn int qemu_gluster_co_readv(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
+ int64_t sector_num,
+ int nb_sectors,
+ QEMUIOVector *qiov)
{
return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 0);
}
static coroutine_fn int qemu_gluster_co_writev(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors, QEMUIOVector *qiov)
+ int64_t sector_num,
+ int nb_sectors,
+ QEMUIOVector *qiov)
{
return qemu_gluster_co_rw(bs, sector_num, nb_sectors, qiov, 1);
}
+static void qemu_gluster_close(BlockDriverState *bs)
+{
+ BDRVGlusterState *s = bs->opaque;
+
+ g_free(s->logfile);
+ if (s->fd) {
+ glfs_close(s->fd);
+ s->fd = NULL;
+ }
+ glfs_clear_preopened(s->glfs);
+}
+
static coroutine_fn int qemu_gluster_co_flush_to_disk(BlockDriverState *bs)
{
int ret;
- GlusterAIOCB *acb = g_slice_new(GlusterAIOCB);
+ GlusterAIOCB acb;
BDRVGlusterState *s = bs->opaque;
- acb->size = 0;
- acb->ret = 0;
- acb->coroutine = qemu_coroutine_self();
- acb->aio_context = bdrv_get_aio_context(bs);
+ acb.size = 0;
+ acb.ret = 0;
+ acb.coroutine = qemu_coroutine_self();
+ acb.aio_context = bdrv_get_aio_context(bs);
- ret = glfs_fsync_async(s->fd, &gluster_finish_aiocb, acb);
+ ret = glfs_fsync_async(s->fd, gluster_finish_aiocb, &acb);
if (ret < 0) {
ret = -errno;
- goto out;
+ goto error;
}
qemu_coroutine_yield();
- ret = acb->ret;
+ if (acb.ret < 0) {
+ ret = acb.ret;
+ goto error;
+ }
-out:
- g_slice_free(GlusterAIOCB, acb);
+ return acb.ret;
+
+error:
+ /* Some versions of Gluster (3.5.6 -> 3.5.8?) will not retain its cache
+ * after a fsync failure, so we have no way of allowing the guest to safely
+ * continue. Gluster versions prior to 3.5.6 don't retain the cache
+ * either, but will invalidate the fd on error, so this is again our only
+ * option.
+ *
+ * The 'resync-failed-syncs-after-fsync' xlator option for the
+ * write-behind cache will cause later gluster versions to retain its
+ * cache after error, so long as the fd remains open. However, we
+ * currently have no way of knowing if this option is supported.
+ *
+ * TODO: Once gluster provides a way for us to determine if the option
+ * is supported, bypass the closure and setting drv to NULL. */
+ qemu_gluster_close(bs);
+ bs->drv = NULL;
return ret;
}
#ifdef CONFIG_GLUSTERFS_DISCARD
-static coroutine_fn int qemu_gluster_co_discard(BlockDriverState *bs,
- int64_t sector_num, int nb_sectors)
+static coroutine_fn int qemu_gluster_co_pdiscard(BlockDriverState *bs,
+ int64_t offset, int size)
{
int ret;
- GlusterAIOCB *acb = g_slice_new(GlusterAIOCB);
+ GlusterAIOCB acb;
BDRVGlusterState *s = bs->opaque;
- size_t size = nb_sectors * BDRV_SECTOR_SIZE;
- off_t offset = sector_num * BDRV_SECTOR_SIZE;
- acb->size = 0;
- acb->ret = 0;
- acb->coroutine = qemu_coroutine_self();
- acb->aio_context = bdrv_get_aio_context(bs);
+ acb.size = 0;
+ acb.ret = 0;
+ acb.coroutine = qemu_coroutine_self();
+ acb.aio_context = bdrv_get_aio_context(bs);
- ret = glfs_discard_async(s->fd, offset, size, &gluster_finish_aiocb, acb);
+ ret = glfs_discard_async(s->fd, offset, size, gluster_finish_aiocb, &acb);
if (ret < 0) {
- ret = -errno;
- goto out;
+ return -errno;
}
qemu_coroutine_yield();
- ret = acb->ret;
-
-out:
- g_slice_free(GlusterAIOCB, acb);
- return ret;
+ return acb.ret;
}
#endif
}
}
-static void qemu_gluster_close(BlockDriverState *bs)
+static int qemu_gluster_has_zero_init(BlockDriverState *bs)
+{
+ /* GlusterFS volume could be backed by a block device */
+ return 0;
+}
+
+/*
+ * Find allocation range in @bs around offset @start.
+ * May change underlying file descriptor's file offset.
+ * If @start is not in a hole, store @start in @data, and the
+ * beginning of the next hole in @hole, and return 0.
+ * If @start is in a non-trailing hole, store @start in @hole and the
+ * beginning of the next non-hole in @data, and return 0.
+ * If @start is in a trailing hole or beyond EOF, return -ENXIO.
+ * If we can't find out, return a negative errno other than -ENXIO.
+ *
+ * (Shamefully copied from raw-posix.c, only miniscule adaptions.)
+ */
+static int find_allocation(BlockDriverState *bs, off_t start,
+ off_t *data, off_t *hole)
{
BDRVGlusterState *s = bs->opaque;
- if (s->fd) {
- glfs_close(s->fd);
- s->fd = NULL;
+ if (!s->supports_seek_data) {
+ goto exit;
+ }
+
+#if defined SEEK_HOLE && defined SEEK_DATA
+ off_t offs;
+
+ /*
+ * SEEK_DATA cases:
+ * D1. offs == start: start is in data
+ * D2. offs > start: start is in a hole, next data at offs
+ * D3. offs < 0, errno = ENXIO: either start is in a trailing hole
+ * or start is beyond EOF
+ * If the latter happens, the file has been truncated behind
+ * our back since we opened it. All bets are off then.
+ * Treating like a trailing hole is simplest.
+ * D4. offs < 0, errno != ENXIO: we learned nothing
+ */
+ offs = glfs_lseek(s->fd, start, SEEK_DATA);
+ if (offs < 0) {
+ return -errno; /* D3 or D4 */
+ }
+ assert(offs >= start);
+
+ if (offs > start) {
+ /* D2: in hole, next data at offs */
+ *hole = start;
+ *data = offs;
+ return 0;
+ }
+
+ /* D1: in data, end not yet known */
+
+ /*
+ * SEEK_HOLE cases:
+ * H1. offs == start: start is in a hole
+ * If this happens here, a hole has been dug behind our back
+ * since the previous lseek().
+ * H2. offs > start: either start is in data, next hole at offs,
+ * or start is in trailing hole, EOF at offs
+ * Linux treats trailing holes like any other hole: offs ==
+ * start. Solaris seeks to EOF instead: offs > start (blech).
+ * If that happens here, a hole has been dug behind our back
+ * since the previous lseek().
+ * H3. offs < 0, errno = ENXIO: start is beyond EOF
+ * If this happens, the file has been truncated behind our
+ * back since we opened it. Treat it like a trailing hole.
+ * H4. offs < 0, errno != ENXIO: we learned nothing
+ * Pretend we know nothing at all, i.e. "forget" about D1.
+ */
+ offs = glfs_lseek(s->fd, start, SEEK_HOLE);
+ if (offs < 0) {
+ return -errno; /* D1 and (H3 or H4) */
+ }
+ assert(offs >= start);
+
+ if (offs > start) {
+ /*
+ * D1 and H2: either in data, next hole at offs, or it was in
+ * data but is now in a trailing hole. In the latter case,
+ * all bets are off. Treating it as if it there was data all
+ * the way to EOF is safe, so simply do that.
+ */
+ *data = start;
+ *hole = offs;
+ return 0;
}
- glfs_fini(s->glfs);
+
+ /* D1 and H1 */
+ return -EBUSY;
+#endif
+
+exit:
+ return -ENOTSUP;
}
-static int qemu_gluster_has_zero_init(BlockDriverState *bs)
+/*
+ * Returns the allocation status of the specified sectors.
+ *
+ * If 'sector_num' is beyond the end of the disk image the return value is 0
+ * and 'pnum' is set to 0.
+ *
+ * 'pnum' is set to the number of sectors (including and immediately following
+ * the specified sector) that are known to be in the same
+ * allocated/unallocated state.
+ *
+ * 'nb_sectors' is the max value 'pnum' should be set to. If nb_sectors goes
+ * beyond the end of the disk image it will be clamped.
+ *
+ * (Based on raw_co_get_block_status() from raw-posix.c.)
+ */
+static int64_t coroutine_fn qemu_gluster_co_get_block_status(
+ BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum,
+ BlockDriverState **file)
{
- /* GlusterFS volume could be backed by a block device */
- return 0;
-}
+ BDRVGlusterState *s = bs->opaque;
+ off_t start, data = 0, hole = 0;
+ int64_t total_size;
+ int ret = -EINVAL;
-static QemuOptsList qemu_gluster_create_opts = {
- .name = "qemu-gluster-create-opts",
- .head = QTAILQ_HEAD_INITIALIZER(qemu_gluster_create_opts.head),
- .desc = {
- {
- .name = BLOCK_OPT_SIZE,
- .type = QEMU_OPT_SIZE,
- .help = "Virtual disk size"
- },
- {
- .name = BLOCK_OPT_PREALLOC,
- .type = QEMU_OPT_STRING,
- .help = "Preallocation mode (allowed values: off, full)"
- },
- { /* end of list */ }
+ if (!s->fd) {
+ return ret;
}
-};
+
+ start = sector_num * BDRV_SECTOR_SIZE;
+ total_size = bdrv_getlength(bs);
+ if (total_size < 0) {
+ return total_size;
+ } else if (start >= total_size) {
+ *pnum = 0;
+ return 0;
+ } else if (start + nb_sectors * BDRV_SECTOR_SIZE > total_size) {
+ nb_sectors = DIV_ROUND_UP(total_size - start, BDRV_SECTOR_SIZE);
+ }
+
+ ret = find_allocation(bs, start, &data, &hole);
+ if (ret == -ENXIO) {
+ /* Trailing hole */
+ *pnum = nb_sectors;
+ ret = BDRV_BLOCK_ZERO;
+ } else if (ret < 0) {
+ /* No info available, so pretend there are no holes */
+ *pnum = nb_sectors;
+ ret = BDRV_BLOCK_DATA;
+ } else if (data == start) {
+ /* On a data extent, compute sectors to the end of the extent,
+ * possibly including a partial sector at EOF. */
+ *pnum = MIN(nb_sectors, DIV_ROUND_UP(hole - start, BDRV_SECTOR_SIZE));
+ ret = BDRV_BLOCK_DATA;
+ } else {
+ /* On a hole, compute sectors to the beginning of the next extent. */
+ assert(hole == start);
+ *pnum = MIN(nb_sectors, (data - start) / BDRV_SECTOR_SIZE);
+ ret = BDRV_BLOCK_ZERO;
+ }
+
+ *file = bs;
+
+ return ret | BDRV_BLOCK_OFFSET_VALID | start;
+}
+
static BlockDriver bdrv_gluster = {
.format_name = "gluster",
.protocol_name = "gluster",
.instance_size = sizeof(BDRVGlusterState),
- .bdrv_needs_filename = true,
+ .bdrv_needs_filename = false,
.bdrv_file_open = qemu_gluster_open,
.bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
- .bdrv_co_discard = qemu_gluster_co_discard,
+ .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
#endif
#ifdef CONFIG_GLUSTERFS_ZEROFILL
- .bdrv_co_write_zeroes = qemu_gluster_co_write_zeroes,
+ .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
+ .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
.create_opts = &qemu_gluster_create_opts,
};
.format_name = "gluster",
.protocol_name = "gluster+tcp",
.instance_size = sizeof(BDRVGlusterState),
- .bdrv_needs_filename = true,
+ .bdrv_needs_filename = false,
.bdrv_file_open = qemu_gluster_open,
.bdrv_reopen_prepare = qemu_gluster_reopen_prepare,
.bdrv_reopen_commit = qemu_gluster_reopen_commit,
.bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
- .bdrv_co_discard = qemu_gluster_co_discard,
+ .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
#endif
#ifdef CONFIG_GLUSTERFS_ZEROFILL
- .bdrv_co_write_zeroes = qemu_gluster_co_write_zeroes,
+ .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
+ .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
.create_opts = &qemu_gluster_create_opts,
};
.bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
- .bdrv_co_discard = qemu_gluster_co_discard,
+ .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
#endif
#ifdef CONFIG_GLUSTERFS_ZEROFILL
- .bdrv_co_write_zeroes = qemu_gluster_co_write_zeroes,
+ .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
+ .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
.create_opts = &qemu_gluster_create_opts,
};
+/* rdma is deprecated (actually never supported for volfile fetch).
+ * Let's maintain it for the protocol compatibility, to make sure things
+ * won't break immediately. For now, gluster+rdma will fall back to gluster+tcp
+ * protocol with a warning.
+ * TODO: remove gluster+rdma interface support
+ */
static BlockDriver bdrv_gluster_rdma = {
.format_name = "gluster",
.protocol_name = "gluster+rdma",
.bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk,
.bdrv_has_zero_init = qemu_gluster_has_zero_init,
#ifdef CONFIG_GLUSTERFS_DISCARD
- .bdrv_co_discard = qemu_gluster_co_discard,
+ .bdrv_co_pdiscard = qemu_gluster_co_pdiscard,
#endif
#ifdef CONFIG_GLUSTERFS_ZEROFILL
- .bdrv_co_write_zeroes = qemu_gluster_co_write_zeroes,
+ .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes,
#endif
+ .bdrv_co_get_block_status = qemu_gluster_co_get_block_status,
.create_opts = &qemu_gluster_create_opts,
};
projects / qemu.git / blobdiff