diff options
Diffstat (limited to 'block/gluster.c')
| -rw-r--r-- | block/gluster.c | 1688 |
1 files changed, 1688 insertions, 0 deletions
diff --git a/block/gluster.c b/block/gluster.c new file mode 100644 index 000000000..398976bc6 --- /dev/null +++ b/block/gluster.c @@ -0,0 +1,1688 @@ +/* + * GlusterFS backend for QEMU + * + * Copyright (C) 2012 Bharata B Rao <bharata@linux.vnet.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qemu/units.h" +#include <glusterfs/api/glfs.h> +#include "block/block_int.h" +#include "block/qdict.h" +#include "qapi/error.h" +#include "qapi/qmp/qdict.h" +#include "qapi/qmp/qerror.h" +#include "qemu/uri.h" +#include "qemu/error-report.h" +#include "qemu/module.h" +#include "qemu/option.h" +#include "qemu/cutils.h" + +#ifdef CONFIG_GLUSTERFS_FTRUNCATE_HAS_STAT +# define glfs_ftruncate(fd, offset) glfs_ftruncate(fd, offset, NULL, NULL) +#endif + +#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 */ +/* + * Several versions of GlusterFS (3.12? -> 6.0.1) fail when the transfer size + * is greater or equal to 1024 MiB, so we are limiting the transfer size to 512 + * MiB to avoid this rare issue. + */ +#define GLUSTER_MAX_TRANSFER (512 * MiB) + +#define GERR_INDEX_HINT "hint: check in 'server' array index '%d'\n" + +typedef struct GlusterAIOCB { + int64_t size; + int ret; + Coroutine *coroutine; + AioContext *aio_context; +} GlusterAIOCB; + +typedef struct BDRVGlusterState { + struct glfs *glfs; + struct glfs_fd *fd; + char *logfile; + bool supports_seek_data; + int debug; +} BDRVGlusterState; + +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(, 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" +#ifdef CONFIG_GLUSTERFS_FALLOCATE + ", falloc" +#endif +#ifdef CONFIG_GLUSTERFS_ZEROFILL + ", full" +#endif + ")" + }, + { + .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 = "inet|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 (legacy)", + }, + { + .name = GLUSTER_OPT_PATH, + .type = QEMU_OPT_STRING, + .help = "socket file path (QAPI)", + }, + { /* end of list */ } + }, +}; + +static QemuOptsList runtime_inet_opts = { + .name = "gluster_inet", + .head = QTAILQ_HEAD_INITIALIZER(runtime_inet_opts.head), + .desc = { + { + .name = GLUSTER_OPT_TYPE, + .type = QEMU_OPT_STRING, + .help = "inet|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; + } + } + + return NULL; +} + +static void glfs_clear_preopened(glfs_t *fs) +{ + ListElement *entry = NULL; + ListElement *next; + + if (fs == NULL) { + return; + } + + QLIST_FOREACH_SAFE(entry, &glfs_list, list, next) { + 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(BlockdevOptionsGluster *gconf, char *path) +{ + char *p, *q; + + if (!path) { + return -EINVAL; + } + + /* volume */ + p = q = path + strspn(path, "/"); + p += strcspn(p, "/"); + if (*p == '\0') { + return -EINVAL; + } + gconf->volume = g_strndup(q, p - q); + + /* path */ + p += strspn(p, "/"); + if (*p == '\0') { + return -EINVAL; + } + gconf->path = g_strdup(p); + return 0; +} + +/* + * 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 or unix. If a transport type isn't specified, then tcp type is assumed. + * + * '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. + * + * 'port' is the port number on which glusterd is listening. This is optional + * and if not specified, QEMU will send 0 which will make gluster to use the + * default port. If the transport type is unix, then 'port' should not be + * specified. + * + * 'volume' is the name of the gluster volume which contains the VM image. + * + * '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://host.domain.com:24007/testvol/dir/a.img + * file=gluster+unix:///testvol/dir/a.img?socket=/tmp/glusterd.socket + */ +static int qemu_gluster_parse_uri(BlockdevOptionsGluster *gconf, + const char *filename) +{ + SocketAddress *gsconf; + URI *uri; + QueryParams *qp = NULL; + bool is_unix = false; + int ret = 0; + + uri = uri_parse(filename); + if (!uri) { + return -EINVAL; + } + + gsconf = g_new0(SocketAddress, 1); + QAPI_LIST_PREPEND(gconf->server, gsconf); + + /* transport */ + if (!uri->scheme || !strcmp(uri->scheme, "gluster")) { + gsconf->type = SOCKET_ADDRESS_TYPE_INET; + } else if (!strcmp(uri->scheme, "gluster+tcp")) { + gsconf->type = SOCKET_ADDRESS_TYPE_INET; + } else if (!strcmp(uri->scheme, "gluster+unix")) { + gsconf->type = SOCKET_ADDRESS_TYPE_UNIX; + is_unix = true; + } else if (!strcmp(uri->scheme, "gluster+rdma")) { + gsconf->type = SOCKET_ADDRESS_TYPE_INET; + warn_report("rdma feature is not supported, falling back to tcp"); + } else { + ret = -EINVAL; + goto out; + } + + ret = parse_volume_options(gconf, uri->path); + if (ret < 0) { + goto out; + } + + qp = query_params_parse(uri->query); + if (qp->n > 1 || (is_unix && !qp->n) || (!is_unix && qp->n)) { + ret = -EINVAL; + goto out; + } + + if (is_unix) { + if (uri->server || uri->port) { + ret = -EINVAL; + goto out; + } + if (strcmp(qp->p[0].name, "socket")) { + ret = -EINVAL; + goto out; + } + gsconf->u.q_unix.path = g_strdup(qp->p[0].value); + } else { + gsconf->u.inet.host = g_strdup(uri->server ? uri->server : "localhost"); + if (uri->port) { + gsconf->u.inet.port = g_strdup_printf("%d", uri->port); + } else { + gsconf->u.inet.port = g_strdup_printf("%d", GLUSTER_DEFAULT_PORT); + } + } + +out: + if (qp) { + query_params_free(qp); + } + uri_free(uri); + return ret; +} + +static struct glfs *qemu_gluster_glfs_init(BlockdevOptionsGluster *gconf, + Error **errp) +{ + struct glfs *glfs; + int ret; + int old_errno; + SocketAddressList *server; + unsigned long long port; + + glfs = glfs_find_preopened(gconf->volume); + if (glfs) { + return glfs; + } + + glfs = glfs_new(gconf->volume); + if (!glfs) { + goto out; + } + + glfs_set_preopened(gconf->volume, glfs); + + for (server = gconf->server; server; server = server->next) { + switch (server->value->type) { + case SOCKET_ADDRESS_TYPE_UNIX: + ret = glfs_set_volfile_server(glfs, "unix", + server->value->u.q_unix.path, 0); + break; + case SOCKET_ADDRESS_TYPE_INET: + if (parse_uint_full(server->value->u.inet.port, &port, 10) < 0 || + port > 65535) { + error_setg(errp, "'%s' is not a valid port number", + server->value->u.inet.port); + errno = EINVAL; + goto out; + } + ret = glfs_set_volfile_server(glfs, "tcp", + server->value->u.inet.host, + (int)port); + break; + case SOCKET_ADDRESS_TYPE_VSOCK: + case SOCKET_ADDRESS_TYPE_FD: + default: + abort(); + } + + if (ret < 0) { + goto out; + } + } + + ret = glfs_set_logging(glfs, gconf->logfile, gconf->debug); + if (ret < 0) { + goto out; + } + + ret = glfs_init(glfs); + if (ret) { + 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 == SOCKET_ADDRESS_TYPE_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.inet.host, + server->value->u.inet.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) { + errno = EINVAL; + } + + goto out; + } + return glfs; + +out: + if (glfs) { + old_errno = errno; + glfs_clear_preopened(glfs); + errno = old_errno; + } + return NULL; +} + +/* + * Convert the json formatted command line into qapi. +*/ +static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf, + QDict *options, Error **errp) +{ + QemuOpts *opts; + SocketAddress *gsconf = NULL; + SocketAddressList **tail; + QDict *backing_options = NULL; + Error *local_err = NULL; + char *str = NULL; + const char *ptr; + int i, type, num_servers; + + /* create opts info from runtime_json_opts list */ + opts = qemu_opts_create(&runtime_json_opts, NULL, 0, &error_abort); + if (!qemu_opts_absorb_qdict(opts, options, errp)) { + 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); + tail = &gconf->server; + + 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); + if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) { + goto out; + } + + ptr = qemu_opt_get(opts, GLUSTER_OPT_TYPE); + if (!ptr) { + error_setg(&local_err, QERR_MISSING_PARAMETER, GLUSTER_OPT_TYPE); + error_append_hint(&local_err, GERR_INDEX_HINT, i); + goto out; + + } + gsconf = g_new0(SocketAddress, 1); + if (!strcmp(ptr, "tcp")) { + ptr = "inet"; /* accept legacy "tcp" */ + } + type = qapi_enum_parse(&SocketAddressType_lookup, ptr, -1, NULL); + if (type != SOCKET_ADDRESS_TYPE_INET + && type != SOCKET_ADDRESS_TYPE_UNIX) { + error_setg(&local_err, + "Parameter '%s' may be 'inet' or 'unix'", + GLUSTER_OPT_TYPE); + error_append_hint(&local_err, GERR_INDEX_HINT, i); + goto out; + } + gsconf->type = type; + qemu_opts_del(opts); + + if (gsconf->type == SOCKET_ADDRESS_TYPE_INET) { + /* create opts info from runtime_inet_opts list */ + opts = qemu_opts_create(&runtime_inet_opts, NULL, 0, &error_abort); + if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) { + 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.inet.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.inet.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.inet.has_to = true; + } + ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV4); + if (ptr) { + gsconf->u.inet.has_ipv4 = true; + } + ptr = qemu_opt_get(opts, GLUSTER_OPT_IPV6); + if (ptr) { + gsconf->u.inet.has_ipv6 = true; + } + if (gsconf->u.inet.has_to) { + error_setg(&local_err, "Parameter 'to' not supported"); + goto out; + } + if (gsconf->u.inet.has_ipv4 || gsconf->u.inet.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); + if (!qemu_opts_absorb_qdict(opts, backing_options, errp)) { + goto out; + } + + ptr = qemu_opt_get(opts, GLUSTER_OPT_PATH); + if (!ptr) { + ptr = qemu_opt_get(opts, GLUSTER_OPT_SOCKET); + } else if (qemu_opt_get(opts, GLUSTER_OPT_SOCKET)) { + error_setg(&local_err, + "Conflicting parameters 'path' and 'socket'"); + error_append_hint(&local_err, GERR_INDEX_HINT, i); + goto out; + } + if (!ptr) { + error_setg(&local_err, QERR_MISSING_PARAMETER, + GLUSTER_OPT_PATH); + error_append_hint(&local_err, GERR_INDEX_HINT, i); + goto out; + } + gsconf->u.q_unix.path = g_strdup(ptr); + qemu_opts_del(opts); + } + + QAPI_LIST_APPEND(tail, gsconf); + gsconf = NULL; + + qobject_unref(backing_options); + backing_options = NULL; + g_free(str); + str = NULL; + } + + return 0; + +out: + error_propagate(errp, local_err); + qapi_free_SocketAddress(gsconf); + qemu_opts_del(opts); + g_free(str); + qobject_unref(backing_options); + errno = EINVAL; + return -errno; +} + +/* Converts options given in @filename and the @options QDict into the QAPI + * object @gconf. */ +static int qemu_gluster_parse(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 %s", filename); + error_append_hint(errp, "Usage: file=gluster[+transport]://" + "[host[:port]]volume/path[?socket=...]" + "[,file.debug=N]" + "[,file.logfile=/path/filename.log]\n"); + return ret; + } + } 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=inet," + "file.server.0.host=1.2.3.4," + "file.server.0.port=24007," + "file.server.1.transport=unix," + "file.server.1.path=/var/run/glusterd.socket ..." + "\n"); + return ret; + } + } + + return 0; +} + +static struct glfs *qemu_gluster_init(BlockdevOptionsGluster *gconf, + const char *filename, + QDict *options, Error **errp) +{ + int ret; + + ret = qemu_gluster_parse(gconf, filename, options, errp); + if (ret < 0) { + errno = -ret; + return NULL; + } + + return qemu_gluster_glfs_init(gconf, errp); +} + +/* + * AIO callback routine called from GlusterFS thread. + */ +static void gluster_finish_aiocb(struct glfs_fd *fd, ssize_t ret, +#ifdef CONFIG_GLUSTERFS_IOCB_HAS_STAT + struct glfs_stat *pre, struct glfs_stat *post, +#endif + void *arg) +{ + GlusterAIOCB *acb = (GlusterAIOCB *)arg; + + if (!ret || ret == acb->size) { + acb->ret = 0; /* Success */ + } else if (ret < 0) { + acb->ret = -errno; /* Read/Write failed */ + } else { + acb->ret = -EIO; /* Partial read/write - fail it */ + } + + aio_co_schedule(acb->aio_context, acb->coroutine); +} + +static void qemu_gluster_parse_flags(int bdrv_flags, int *open_flags) +{ + assert(open_flags != NULL); + + *open_flags |= O_BINARY; + + if (bdrv_flags & BDRV_O_RDWR) { + *open_flags |= O_RDWR; + } else { + *open_flags |= O_RDONLY; + } + + if ((bdrv_flags & BDRV_O_NOCACHE)) { + *open_flags |= O_DIRECT; + } +} + +/* + * 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; + BlockdevOptionsGluster *gconf = NULL; + QemuOpts *opts; + const char *filename, *logfile; + + opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort); + if (!qemu_opts_absorb_qdict(opts, options, errp)) { + ret = -EINVAL; + goto out; + } + + filename = qemu_opt_get(opts, GLUSTER_OPT_FILENAME); + + s->debug = qemu_opt_get_number(opts, GLUSTER_OPT_DEBUG, + GLUSTER_DEBUG_DEFAULT); + if (s->debug < 0) { + s->debug = 0; + } else if (s->debug > GLUSTER_DEBUG_MAX) { + s->debug = GLUSTER_DEBUG_MAX; + } + + gconf = g_new0(BlockdevOptionsGluster, 1); + gconf->debug = s->debug; + gconf->has_debug = true; + + logfile = qemu_opt_get(opts, GLUSTER_OPT_LOGFILE); + s->logfile = g_strdup(logfile ? logfile : GLUSTER_LOGFILE_DEFAULT); + + 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->path, open_flags); + ret = s->fd ? 0 : -errno; + + if (ret == -EACCES || ret == -EROFS) { + /* Try to degrade to read-only, but if it doesn't work, still use the + * normal error message. */ + if (bdrv_apply_auto_read_only(bs, NULL, NULL) == 0) { + open_flags = (open_flags & ~O_RDWR) | O_RDONLY; + s->fd = glfs_open(s->glfs, gconf->path, open_flags); + ret = s->fd ? 0 : -errno; + } + } + + s->supports_seek_data = qemu_gluster_test_seek(s->fd); + +out: + qemu_opts_del(opts); + qapi_free_BlockdevOptionsGluster(gconf); + if (!ret) { + return ret; + } + g_free(s->logfile); + if (s->fd) { + glfs_close(s->fd); + } + + glfs_clear_preopened(s->glfs); + + return ret; +} + +static void qemu_gluster_refresh_limits(BlockDriverState *bs, Error **errp) +{ + bs->bl.max_transfer = GLUSTER_MAX_TRANSFER; + bs->bl.max_pdiscard = SIZE_MAX; +} + +static int qemu_gluster_reopen_prepare(BDRVReopenState *state, + BlockReopenQueue *queue, Error **errp) +{ + int ret = 0; + BDRVGlusterState *s; + BDRVGlusterReopenState *reop_s; + 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(BlockdevOptionsGluster, 1); + gconf->debug = s->debug; + gconf->has_debug = true; + gconf->logfile = g_strdup(s->logfile); + gconf->has_logfile = true; + + /* + * If 'state->bs->exact_filename' is empty, 'state->options' should contain + * the JSON parameters already parsed. + */ + if (state->bs->exact_filename[0] != '\0') { + reop_s->glfs = qemu_gluster_init(gconf, state->bs->exact_filename, NULL, + errp); + } else { + reop_s->glfs = qemu_gluster_init(gconf, NULL, state->options, errp); + } + if (reop_s->glfs == NULL) { + ret = -errno; + goto exit; + } + +#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; + goto exit; + } + +exit: + /* state->opaque will be freed in either the _abort or _commit */ + qapi_free_BlockdevOptionsGluster(gconf); + return ret; +} + +static void qemu_gluster_reopen_commit(BDRVReopenState *state) +{ + BDRVGlusterReopenState *reop_s = state->opaque; + BDRVGlusterState *s = state->bs->opaque; + + + /* close the old */ + if (s->fd) { + glfs_close(s->fd); + } + + glfs_clear_preopened(s->glfs); + + /* use the newly opened image / connection */ + s->fd = reop_s->fd; + s->glfs = reop_s->glfs; + + g_free(state->opaque); + state->opaque = NULL; + + return; +} + + +static void qemu_gluster_reopen_abort(BDRVReopenState *state) +{ + BDRVGlusterReopenState *reop_s = state->opaque; + + if (reop_s == NULL) { + return; + } + + if (reop_s->fd) { + glfs_close(reop_s->fd); + } + + glfs_clear_preopened(reop_s->glfs); + + g_free(state->opaque); + state->opaque = NULL; + + return; +} + +#ifdef CONFIG_GLUSTERFS_ZEROFILL +static coroutine_fn int qemu_gluster_co_pwrite_zeroes(BlockDriverState *bs, + int64_t offset, + int64_t bytes, + BdrvRequestFlags flags) +{ + int ret; + GlusterAIOCB acb; + BDRVGlusterState *s = bs->opaque; + + acb.size = bytes; + acb.ret = 0; + acb.coroutine = qemu_coroutine_self(); + acb.aio_context = bdrv_get_aio_context(bs); + + ret = glfs_zerofill_async(s->fd, offset, bytes, gluster_finish_aiocb, &acb); + if (ret < 0) { + return -errno; + } + + qemu_coroutine_yield(); + return acb.ret; +} +#endif + +static int qemu_gluster_do_truncate(struct glfs_fd *fd, int64_t offset, + PreallocMode prealloc, Error **errp) +{ + int64_t current_length; + + current_length = glfs_lseek(fd, 0, SEEK_END); + if (current_length < 0) { + error_setg_errno(errp, errno, "Failed to determine current size"); + return -errno; + } + + if (current_length > offset && prealloc != PREALLOC_MODE_OFF) { + error_setg(errp, "Cannot use preallocation for shrinking files"); + return -ENOTSUP; + } + + if (current_length == offset) { + return 0; + } + + switch (prealloc) { +#ifdef CONFIG_GLUSTERFS_FALLOCATE + case PREALLOC_MODE_FALLOC: + if (glfs_fallocate(fd, 0, current_length, offset - current_length)) { + error_setg_errno(errp, errno, "Could not preallocate data"); + return -errno; + } + break; +#endif /* CONFIG_GLUSTERFS_FALLOCATE */ +#ifdef CONFIG_GLUSTERFS_ZEROFILL + case PREALLOC_MODE_FULL: + if (glfs_ftruncate(fd, offset)) { + error_setg_errno(errp, errno, "Could not resize file"); + return -errno; + } + if (glfs_zerofill(fd, current_length, offset - current_length)) { + error_setg_errno(errp, errno, "Could not zerofill the new area"); + return -errno; + } + break; +#endif /* CONFIG_GLUSTERFS_ZEROFILL */ + case PREALLOC_MODE_OFF: + if (glfs_ftruncate(fd, offset)) { + error_setg_errno(errp, errno, "Could not resize file"); + return -errno; + } + break; + default: + error_setg(errp, "Unsupported preallocation mode: %s", + PreallocMode_str(prealloc)); + return -EINVAL; + } + + return 0; +} + +static int qemu_gluster_co_create(BlockdevCreateOptions *options, + Error **errp) +{ + BlockdevCreateOptionsGluster *opts = &options->u.gluster; + struct glfs *glfs; + struct glfs_fd *fd = NULL; + int ret = 0; + + assert(options->driver == BLOCKDEV_DRIVER_GLUSTER); + + glfs = qemu_gluster_glfs_init(opts->location, errp); + if (!glfs) { + ret = -errno; + goto out; + } + + fd = glfs_creat(glfs, opts->location->path, + O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, S_IRUSR | S_IWUSR); + if (!fd) { + ret = -errno; + goto out; + } + + ret = qemu_gluster_do_truncate(fd, opts->size, opts->preallocation, errp); + +out: + if (fd) { + if (glfs_close(fd) != 0 && ret == 0) { + ret = -errno; + } + } + glfs_clear_preopened(glfs); + return ret; +} + +static int coroutine_fn qemu_gluster_co_create_opts(BlockDriver *drv, + const char *filename, + QemuOpts *opts, + Error **errp) +{ + BlockdevCreateOptions *options; + BlockdevCreateOptionsGluster *gopts; + BlockdevOptionsGluster *gconf; + char *tmp = NULL; + Error *local_err = NULL; + int ret; + + options = g_new0(BlockdevCreateOptions, 1); + options->driver = BLOCKDEV_DRIVER_GLUSTER; + gopts = &options->u.gluster; + + gconf = g_new0(BlockdevOptionsGluster, 1); + gopts->location = gconf; + + gopts->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); + gopts->preallocation = qapi_enum_parse(&PreallocMode_lookup, tmp, + PREALLOC_MODE_OFF, &local_err); + g_free(tmp); + if (local_err) { + error_propagate(errp, local_err); + ret = -EINVAL; + goto fail; + } + + gconf->debug = qemu_opt_get_number_del(opts, GLUSTER_OPT_DEBUG, + GLUSTER_DEBUG_DEFAULT); + if (gconf->debug < 0) { + gconf->debug = 0; + } else if (gconf->debug > GLUSTER_DEBUG_MAX) { + gconf->debug = GLUSTER_DEBUG_MAX; + } + gconf->has_debug = 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; + + ret = qemu_gluster_parse(gconf, filename, NULL, errp); + if (ret < 0) { + goto fail; + } + + ret = qemu_gluster_co_create(options, errp); + if (ret < 0) { + goto fail; + } + + ret = 0; +fail: + qapi_free_BlockdevCreateOptions(options); + return ret; +} + +static coroutine_fn int qemu_gluster_co_rw(BlockDriverState *bs, + int64_t sector_num, int nb_sectors, + QEMUIOVector *qiov, int write) +{ + int ret; + 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); + + if (write) { + ret = glfs_pwritev_async(s->fd, qiov->iov, qiov->niov, offset, 0, + gluster_finish_aiocb, &acb); + } else { + ret = glfs_preadv_async(s->fd, qiov->iov, qiov->niov, offset, 0, + gluster_finish_aiocb, &acb); + } + + if (ret < 0) { + return -errno; + } + + qemu_coroutine_yield(); + return acb.ret; +} + +static coroutine_fn int qemu_gluster_co_truncate(BlockDriverState *bs, + int64_t offset, + bool exact, + PreallocMode prealloc, + BdrvRequestFlags flags, + Error **errp) +{ + BDRVGlusterState *s = bs->opaque; + return qemu_gluster_do_truncate(s->fd, offset, prealloc, errp); +} + +static coroutine_fn int qemu_gluster_co_readv(BlockDriverState *bs, + 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, + int flags) +{ + assert(!flags); + 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; + BDRVGlusterState *s = bs->opaque; + + 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); + if (ret < 0) { + ret = -errno; + goto error; + } + + qemu_coroutine_yield(); + if (acb.ret < 0) { + ret = acb.ret; + goto error; + } + + 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_pdiscard(BlockDriverState *bs, + int64_t offset, int64_t bytes) +{ + int ret; + GlusterAIOCB acb; + BDRVGlusterState *s = bs->opaque; + + assert(bytes <= SIZE_MAX); /* rely on max_pdiscard */ + + 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, bytes, gluster_finish_aiocb, &acb); + if (ret < 0) { + return -errno; + } + + qemu_coroutine_yield(); + return acb.ret; +} +#endif + +static int64_t qemu_gluster_getlength(BlockDriverState *bs) +{ + BDRVGlusterState *s = bs->opaque; + int64_t ret; + + ret = glfs_lseek(s->fd, 0, SEEK_END); + if (ret < 0) { + return -errno; + } else { + return ret; + } +} + +static int64_t qemu_gluster_allocated_file_size(BlockDriverState *bs) +{ + BDRVGlusterState *s = bs->opaque; + struct stat st; + int ret; + + ret = glfs_fstat(s->fd, &st); + if (ret < 0) { + return -errno; + } else { + return st.st_blocks * 512; + } +} + +/* + * 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 file-posix.c, only minuscule adaptions.) + */ +static int find_allocation(BlockDriverState *bs, off_t start, + off_t *data, off_t *hole) +{ + BDRVGlusterState *s = bs->opaque; + + 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 */ + } + + if (offs < start) { + /* This is not a valid return by lseek(). We are safe to just return + * -EIO in this case, and we'll treat it like D4. Unfortunately some + * versions of gluster server will return offs < start, so an assert + * here will unnecessarily abort QEMU. */ + return -EIO; + } + + 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) */ + } + + if (offs < start) { + /* This is not a valid return by lseek(). We are safe to just return + * -EIO in this case, and we'll treat it like H4. Unfortunately some + * versions of gluster server will return offs < start, so an assert + * here will unnecessarily abort QEMU. */ + return -EIO; + } + + 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; + } + + /* D1 and H1 */ + return -EBUSY; +#endif + +exit: + return -ENOTSUP; +} + +/* + * Returns the allocation status of the specified offset. + * + * The block layer guarantees 'offset' and 'bytes' are within bounds. + * + * 'pnum' is set to the number of bytes (including and immediately following + * the specified offset) that are known to be in the same + * allocated/unallocated state. + * + * 'bytes' is a soft cap for 'pnum'. If the information is free, 'pnum' may + * well exceed it. + * + * (Based on raw_co_block_status() from file-posix.c.) + */ +static int coroutine_fn qemu_gluster_co_block_status(BlockDriverState *bs, + bool want_zero, + int64_t offset, + int64_t bytes, + int64_t *pnum, + int64_t *map, + BlockDriverState **file) +{ + BDRVGlusterState *s = bs->opaque; + off_t data = 0, hole = 0; + int ret = -EINVAL; + + assert(QEMU_IS_ALIGNED(offset | bytes, bs->bl.request_alignment)); + + if (!s->fd) { + return ret; + } + + if (!want_zero) { + *pnum = bytes; + *map = offset; + *file = bs; + return BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; + } + + ret = find_allocation(bs, offset, &data, &hole); + if (ret == -ENXIO) { + /* Trailing hole */ + *pnum = bytes; + ret = BDRV_BLOCK_ZERO; + } else if (ret < 0) { + /* No info available, so pretend there are no holes */ + *pnum = bytes; + ret = BDRV_BLOCK_DATA; + } else if (data == offset) { + /* On a data extent, compute bytes to the end of the extent, + * possibly including a partial sector at EOF. */ + *pnum = hole - offset; + + /* + * We are not allowed to return partial sectors, though, so + * round up if necessary. + */ + if (!QEMU_IS_ALIGNED(*pnum, bs->bl.request_alignment)) { + int64_t file_length = qemu_gluster_getlength(bs); + if (file_length > 0) { + /* Ignore errors, this is just a safeguard */ + assert(hole == file_length); + } + *pnum = ROUND_UP(*pnum, bs->bl.request_alignment); + } + + ret = BDRV_BLOCK_DATA; + } else { + /* On a hole, compute bytes to the beginning of the next extent. */ + assert(hole == offset); + *pnum = data - offset; + ret = BDRV_BLOCK_ZERO; + } + + *map = offset; + *file = bs; + + return ret | BDRV_BLOCK_OFFSET_VALID; +} + + +static const char *const gluster_strong_open_opts[] = { + GLUSTER_OPT_VOLUME, + GLUSTER_OPT_PATH, + GLUSTER_OPT_TYPE, + GLUSTER_OPT_SERVER_PATTERN, + GLUSTER_OPT_HOST, + GLUSTER_OPT_PORT, + GLUSTER_OPT_TO, + GLUSTER_OPT_IPV4, + GLUSTER_OPT_IPV6, + GLUSTER_OPT_SOCKET, + + NULL +}; + +static BlockDriver bdrv_gluster = { + .format_name = "gluster", + .protocol_name = "gluster", + .instance_size = sizeof(BDRVGlusterState), + .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_reopen_abort = qemu_gluster_reopen_abort, + .bdrv_close = qemu_gluster_close, + .bdrv_co_create = qemu_gluster_co_create, + .bdrv_co_create_opts = qemu_gluster_co_create_opts, + .bdrv_getlength = qemu_gluster_getlength, + .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size, + .bdrv_co_truncate = qemu_gluster_co_truncate, + .bdrv_co_readv = qemu_gluster_co_readv, + .bdrv_co_writev = qemu_gluster_co_writev, + .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, +#ifdef CONFIG_GLUSTERFS_DISCARD + .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, +#endif +#ifdef CONFIG_GLUSTERFS_ZEROFILL + .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, +#endif + .bdrv_co_block_status = qemu_gluster_co_block_status, + .bdrv_refresh_limits = qemu_gluster_refresh_limits, + .create_opts = &qemu_gluster_create_opts, + .strong_runtime_opts = gluster_strong_open_opts, +}; + +static BlockDriver bdrv_gluster_tcp = { + .format_name = "gluster", + .protocol_name = "gluster+tcp", + .instance_size = sizeof(BDRVGlusterState), + .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_reopen_abort = qemu_gluster_reopen_abort, + .bdrv_close = qemu_gluster_close, + .bdrv_co_create = qemu_gluster_co_create, + .bdrv_co_create_opts = qemu_gluster_co_create_opts, + .bdrv_getlength = qemu_gluster_getlength, + .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size, + .bdrv_co_truncate = qemu_gluster_co_truncate, + .bdrv_co_readv = qemu_gluster_co_readv, + .bdrv_co_writev = qemu_gluster_co_writev, + .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, +#ifdef CONFIG_GLUSTERFS_DISCARD + .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, +#endif +#ifdef CONFIG_GLUSTERFS_ZEROFILL + .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, +#endif + .bdrv_co_block_status = qemu_gluster_co_block_status, + .bdrv_refresh_limits = qemu_gluster_refresh_limits, + .create_opts = &qemu_gluster_create_opts, + .strong_runtime_opts = gluster_strong_open_opts, +}; + +static BlockDriver bdrv_gluster_unix = { + .format_name = "gluster", + .protocol_name = "gluster+unix", + .instance_size = sizeof(BDRVGlusterState), + .bdrv_needs_filename = true, + .bdrv_file_open = qemu_gluster_open, + .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, + .bdrv_reopen_commit = qemu_gluster_reopen_commit, + .bdrv_reopen_abort = qemu_gluster_reopen_abort, + .bdrv_close = qemu_gluster_close, + .bdrv_co_create = qemu_gluster_co_create, + .bdrv_co_create_opts = qemu_gluster_co_create_opts, + .bdrv_getlength = qemu_gluster_getlength, + .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size, + .bdrv_co_truncate = qemu_gluster_co_truncate, + .bdrv_co_readv = qemu_gluster_co_readv, + .bdrv_co_writev = qemu_gluster_co_writev, + .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, +#ifdef CONFIG_GLUSTERFS_DISCARD + .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, +#endif +#ifdef CONFIG_GLUSTERFS_ZEROFILL + .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, +#endif + .bdrv_co_block_status = qemu_gluster_co_block_status, + .bdrv_refresh_limits = qemu_gluster_refresh_limits, + .create_opts = &qemu_gluster_create_opts, + .strong_runtime_opts = gluster_strong_open_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", + .instance_size = sizeof(BDRVGlusterState), + .bdrv_needs_filename = true, + .bdrv_file_open = qemu_gluster_open, + .bdrv_reopen_prepare = qemu_gluster_reopen_prepare, + .bdrv_reopen_commit = qemu_gluster_reopen_commit, + .bdrv_reopen_abort = qemu_gluster_reopen_abort, + .bdrv_close = qemu_gluster_close, + .bdrv_co_create = qemu_gluster_co_create, + .bdrv_co_create_opts = qemu_gluster_co_create_opts, + .bdrv_getlength = qemu_gluster_getlength, + .bdrv_get_allocated_file_size = qemu_gluster_allocated_file_size, + .bdrv_co_truncate = qemu_gluster_co_truncate, + .bdrv_co_readv = qemu_gluster_co_readv, + .bdrv_co_writev = qemu_gluster_co_writev, + .bdrv_co_flush_to_disk = qemu_gluster_co_flush_to_disk, +#ifdef CONFIG_GLUSTERFS_DISCARD + .bdrv_co_pdiscard = qemu_gluster_co_pdiscard, +#endif +#ifdef CONFIG_GLUSTERFS_ZEROFILL + .bdrv_co_pwrite_zeroes = qemu_gluster_co_pwrite_zeroes, +#endif + .bdrv_co_block_status = qemu_gluster_co_block_status, + .bdrv_refresh_limits = qemu_gluster_refresh_limits, + .create_opts = &qemu_gluster_create_opts, + .strong_runtime_opts = gluster_strong_open_opts, +}; + +static void bdrv_gluster_init(void) +{ + bdrv_register(&bdrv_gluster_rdma); + bdrv_register(&bdrv_gluster_unix); + bdrv_register(&bdrv_gluster_tcp); + bdrv_register(&bdrv_gluster); +} + +block_init(bdrv_gluster_init); |