[libvirt] [PATCH v3 1/3] Storage: Use rc hold intermediate function return values.

most libvirt code uses 'int rc' to hold intermediate function return values. consistent with the rest of libvirt. Signed-off-by: Yi Li <yili(a)winhong.com&gt; --- src/storage/storage_backend_rbd.c | 202 ++++++++++++++++++-------------------- 1 file changed, 96 insertions(+), 106 deletions(-) diff --git a/src/storage/storage_backend_rbd.c b/src/storage/storage_backend_rbd.c index 34088f7..81f7cd5 100644 --- a/src/storage/storage_backend_rbd.c +++ b/src/storage/storage_backend_rbd.c @@ -184,8 +184,7 @@ static int virStorageBackendRBDOpenRADOSConn(virStorageBackendRBDStatePtr ptr, virStoragePoolDefPtr def) { - int ret = -1; - int r = 0; + int rc, ret = -1; virStoragePoolSourcePtr source = &def->source; virStorageAuthDefPtr authdef = source->auth; unsigned char *secret_value = NULL; @@ -203,8 +202,8 @@ virStorageBackendRBDOpenRADOSConn(virStorageBackendRBDStatePtr ptr, if (authdef) { VIR_DEBUG("Using cephx authorization, username: %s", authdef->username); - if ((r = rados_create(&ptr->cluster, authdef->username)) < 0) { - virReportSystemError(-r, "%s", _("failed to initialize RADOS")); + if ((rc = rados_create(&ptr->cluster, authdef->username)) < 0) { + virReportSystemError(-rc, "%s", _("failed to initialize RADOS")); goto cleanup; } @@ -319,8 +318,8 @@ virStorageBackendRBDOpenRADOSConn(virStorageBackendRBDStatePtr ptr, } ptr->starttime = time(0); - if ((r = rados_connect(ptr->cluster)) < 0) { - virReportSystemError(-r, _("failed to connect to the RADOS monitor on: %s"), + if ((rc = rados_connect(ptr->cluster)) < 0) { + virReportSystemError(-rc, _("failed to connect to the RADOS monitor on: %s"), mon_buff); goto cleanup; } @@ -340,12 +339,12 @@ virStorageBackendRBDOpenIoCTX(virStorageBackendRBDStatePtr ptr, virStoragePoolObjPtr pool) { virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool); - int r = rados_ioctx_create(ptr->cluster, def->source.name, &ptr->ioctx); - if (r < 0) { - virReportSystemError(-r, _("failed to create the RBD IoCTX. Does the pool '%s' exist?"), + int rc = rados_ioctx_create(ptr->cluster, def->source.name, &ptr->ioctx); + if (rc < 0) { + virReportSystemError(-rc, _("failed to create the RBD IoCTX. Does the pool '%s' exist?"), def->source.name); } - return r; + return rc; } static void @@ -408,10 +407,10 @@ volStorageBackendRBDGetFeatures(rbd_image_t image, const char *volname, uint64_t *features) { - int r; + int rc; - if ((r = rbd_get_features(image, features)) < 0) { - virReportSystemError(-r, _("failed to get the features of RBD image " + if ((rc = rbd_get_features(image, features)) < 0) { + virReportSystemError(-rc, _("failed to get the features of RBD image " "%s"), volname); return -1; } @@ -462,13 +461,13 @@ virStorageBackendRBDSetAllocation(virStorageVolDefPtr vol, rbd_image_t *image, rbd_image_info_t *info) { - int r; + int rc; size_t allocation = 0; - if ((r = rbd_diff_iterate2(image, NULL, 0, info->size, 0, 1, + if ((rc = rbd_diff_iterate2(image, NULL, 0, info->size, 0, 1, &virStorageBackendRBDRefreshVolInfoCb, &allocation)) < 0) { - virReportSystemError(-r, _("failed to iterate RBD image '%s'"), + virReportSystemError(-rc, _("failed to iterate RBD image '%s'"), vol->name); return -1; } @@ -512,24 +511,23 @@ volStorageBackendRBDRefreshVolInfo(virStorageVolDefPtr vol, virStoragePoolObjPtr pool, virStorageBackendRBDStatePtr ptr) { - int ret = -1; + int rc, ret = -1; virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool); - int r = 0; rbd_image_t image = NULL; rbd_image_info_t info; uint64_t features; uint64_t flags; - if ((r = rbd_open_read_only(ptr->ioctx, vol->name, &image, NULL)) < 0) { - ret = -r; - virReportSystemError(-r, _("failed to open the RBD image '%s'"), + if ((rc = rbd_open_read_only(ptr->ioctx, vol->name, &image, NULL)) < 0) { + ret = -rc; + virReportSystemError(-rc, _("failed to open the RBD image '%s'"), vol->name); goto cleanup; } - if ((r = rbd_stat(image, &info, sizeof(info))) < 0) { - ret = -r; - virReportSystemError(-r, _("failed to stat the RBD image '%s'"), + if ((rc = rbd_stat(image, &info, sizeof(info))) < 0) { + ret = -rc; + virReportSystemError(-rc, _("failed to stat the RBD image '%s'"), vol->name); goto cleanup; } @@ -672,8 +670,7 @@ virStorageBackendRBDGetVolNames(virStorageBackendRBDStatePtr ptr) static int virStorageBackendRBDRefreshPool(virStoragePoolObjPtr pool) { - int ret = -1; - int r = 0; + int rc, ret = -1; virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool); virStorageBackendRBDStatePtr ptr = NULL; struct rados_cluster_stat_t clusterstat; @@ -684,13 +681,13 @@ virStorageBackendRBDRefreshPool(virStoragePoolObjPtr pool) if (!(ptr = virStorageBackendRBDNewState(pool))) goto cleanup; - if ((r = rados_cluster_stat(ptr->cluster, &clusterstat)) < 0) { - virReportSystemError(-r, "%s", _("failed to stat the RADOS cluster")); + if ((rc = rados_cluster_stat(ptr->cluster, &clusterstat)) < 0) { + virReportSystemError(-rc, "%s", _("failed to stat the RADOS cluster")); goto cleanup; } - if ((r = rados_ioctx_pool_stat(ptr->ioctx, &poolstat)) < 0) { - virReportSystemError(-r, _("failed to stat the RADOS pool '%s'"), + if ((rc = rados_ioctx_pool_stat(ptr->ioctx, &poolstat)) < 0) { + virReportSystemError(-rc, _("failed to stat the RADOS pool '%s'"), def->source.name); goto cleanup; } @@ -715,7 +712,7 @@ virStorageBackendRBDRefreshPool(virStoragePoolObjPtr pool) vol->name = g_steal_pointer(&names[i]); - r = volStorageBackendRBDRefreshVolInfo(vol, pool, ptr); + rc = volStorageBackendRBDRefreshVolInfo(vol, pool, ptr); /* It could be that a volume has been deleted through a different route * then libvirt and that will cause a -ENOENT to be returned. @@ -726,8 +723,8 @@ virStorageBackendRBDRefreshPool(virStoragePoolObjPtr pool) * * Do not error out and simply ignore the volume */ - if (r < 0) { - if (r == -ENOENT || r == -ETIMEDOUT) + if (rc < 0) { + if (rc == -ENOENT || rc == -ETIMEDOUT) continue; goto cleanup; @@ -754,16 +751,15 @@ virStorageBackendRBDCleanupSnapshots(rados_ioctx_t ioctx, virStoragePoolSourcePtr source, virStorageVolDefPtr vol) { - int ret = -1; - int r = 0; + int rc, ret = -1; int max_snaps = 128; int snap_count, protected; size_t i; rbd_image_t image = NULL; g_autofree rbd_snap_info_t *snaps = NULL; - if ((r = rbd_open(ioctx, vol->name, &image, NULL)) < 0) { - virReportSystemError(-r, _("failed to open the RBD image '%s'"), + if ((rc = rbd_open(ioctx, vol->name, &image, NULL)) < 0) { + virReportSystemError(-rc, _("failed to open the RBD image '%s'"), vol->name); goto cleanup; } @@ -782,8 +778,8 @@ virStorageBackendRBDCleanupSnapshots(rados_ioctx_t ioctx, source->name, vol->name); for (i = 0; i < snap_count; i++) { - if ((r = rbd_snap_is_protected(image, snaps[i].name, &protected)) < 0) { - virReportSystemError(-r, _("failed to verify if snapshot '%s/%s@%s' is protected"), + if ((rc = rbd_snap_is_protected(image, snaps[i].name, &protected)) < 0) { + virReportSystemError(-rc, _("failed to verify if snapshot '%s/%s@%s' is protected"), source->name, vol->name, snaps[i].name); goto cleanup; @@ -794,8 +790,8 @@ virStorageBackendRBDCleanupSnapshots(rados_ioctx_t ioctx, "unprotected", source->name, vol->name, snaps[i].name); - if ((r = rbd_snap_unprotect(image, snaps[i].name)) < 0) { - virReportSystemError(-r, _("failed to unprotect snapshot '%s/%s@%s'"), + if ((rc = rbd_snap_unprotect(image, snaps[i].name)) < 0) { + virReportSystemError(-rc, _("failed to unprotect snapshot '%s/%s@%s'"), source->name, vol->name, snaps[i].name); goto cleanup; @@ -805,8 +801,8 @@ virStorageBackendRBDCleanupSnapshots(rados_ioctx_t ioctx, VIR_DEBUG("Removing snapshot %s/%s@%s", source->name, vol->name, snaps[i].name); - if ((r = rbd_snap_remove(image, snaps[i].name)) < 0) { - virReportSystemError(-r, _("failed to remove snapshot '%s/%s@%s'"), + if ((rc = rbd_snap_remove(image, snaps[i].name)) < 0) { + virReportSystemError(-rc, _("failed to remove snapshot '%s/%s@%s'"), source->name, vol->name, snaps[i].name); goto cleanup; @@ -830,8 +826,7 @@ virStorageBackendRBDDeleteVol(virStoragePoolObjPtr pool, virStorageVolDefPtr vol, unsigned int flags) { - int ret = -1; - int r = 0; + int rc, ret = -1; virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool); virStorageBackendRBDStatePtr ptr = NULL; @@ -854,9 +849,9 @@ virStorageBackendRBDDeleteVol(virStoragePoolObjPtr pool, VIR_DEBUG("Removing volume %s/%s", def->source.name, vol->name); - r = rbd_remove(ptr->ioctx, vol->name); - if (r < 0 && (-r) != ENOENT) { - virReportSystemError(-r, _("failed to remove volume '%s/%s'"), + rc = rbd_remove(ptr->ioctx, vol->name); + if (rc < 0 && (-rc) != ENOENT) { + virReportSystemError(-rc, _("failed to remove volume '%s/%s'"), def->source.name, vol->name); goto cleanup; } @@ -906,8 +901,7 @@ virStorageBackendRBDBuildVol(virStoragePoolObjPtr pool, { virStoragePoolDefPtr def = virStoragePoolObjGetDef(pool); virStorageBackendRBDStatePtr ptr = NULL; - int ret = -1; - int r = 0; + int rc, ret = -1; VIR_DEBUG("Creating RBD image %s/%s with size %llu", def->source.name, vol->name, vol->target.capacity); @@ -935,9 +929,9 @@ virStorageBackendRBDBuildVol(virStoragePoolObjPtr pool, if (!(ptr = virStorageBackendRBDNewState(pool))) goto cleanup; - if ((r = virStorageBackendRBDCreateImage(ptr->ioctx, vol->name, + if ((rc = virStorageBackendRBDCreateImage(ptr->ioctx, vol->name, vol->target.capacity)) < 0) { - virReportSystemError(-r, _("failed to create volume '%s/%s'"), + virReportSystemError(-rc, _("failed to create volume '%s/%s'"), def->source.name, vol->name); goto cleanup; } @@ -956,11 +950,11 @@ virStorageBackendRBDImageInfo(rbd_image_t image, uint64_t *stripe_unit, uint64_t *stripe_count) { - int r = 0; + int rc = 0; uint8_t oldformat; - if ((r = rbd_get_old_format(image, &oldformat)) < 0) { - virReportSystemError(-r, _("failed to get the format of RBD image %s"), + if ((rc = rbd_get_old_format(image, &oldformat)) < 0) { + virReportSystemError(-rc, _("failed to get the format of RBD image %s"), volname); return -1; } @@ -976,14 +970,14 @@ virStorageBackendRBDImageInfo(rbd_image_t image, if (volStorageBackendRBDGetFeatures(image, volname, features) < 0) return -1; - if ((r = rbd_get_stripe_unit(image, stripe_unit)) < 0) { - virReportSystemError(-r, _("failed to get the stripe unit of RBD image %s"), + if ((rc = rbd_get_stripe_unit(image, stripe_unit)) < 0) { + virReportSystemError(-rc, _("failed to get the stripe unit of RBD image %s"), volname); return -1; } - if ((r = rbd_get_stripe_count(image, stripe_count)) < 0) { - virReportSystemError(-r, _("failed to get the stripe count of RBD image %s"), + if ((rc = rbd_get_stripe_count(image, stripe_count)) < 0) { + virReportSystemError(-rc, _("failed to get the stripe count of RBD image %s"), volname); return -1; } @@ -1015,8 +1009,7 @@ virStorageBackendRBDSnapshotFindNoDiff(rbd_image_t image, char *imgname, virBufferPtr snapname) { - int r = -1; - int ret = -1; + int rc, ret = -1; int snap_count; int max_snaps = 128; size_t i; @@ -1024,8 +1017,8 @@ virStorageBackendRBDSnapshotFindNoDiff(rbd_image_t image, rbd_image_info_t info; g_autofree rbd_snap_info_t *snaps = NULL; - if ((r = rbd_stat(image, &info, sizeof(info))) < 0) { - virReportSystemError(-r, _("failed to stat the RBD image %s"), + if ((rc = rbd_stat(image, &info, sizeof(info))) < 0) { + virReportSystemError(-rc, _("failed to stat the RBD image %s"), imgname); goto cleanup; } @@ -1063,15 +1056,15 @@ virStorageBackendRBDSnapshotFindNoDiff(rbd_image_t image, * is available */ #if LIBRBD_VERSION_CODE > 265 - r = rbd_diff_iterate2(image, snaps[i].name, 0, info.size, 0, 1, + rc = rbd_diff_iterate2(image, snaps[i].name, 0, info.size, 0, 1, virStorageBackendRBDIterateCb, (void *)&diff); #else - r = rbd_diff_iterate(image, snaps[i].name, 0, info.size, + rc = rbd_diff_iterate(image, snaps[i].name, 0, info.size, virStorageBackendRBDIterateCb, (void *)&diff); #endif - if (r < 0) { - virReportSystemError(-r, _("failed to iterate RBD snapshot %s@%s"), + if (rc < 0) { + virReportSystemError(-rc, _("failed to iterate RBD snapshot %s@%s"), imgname, snaps[i].name); goto cleanup; } @@ -1103,12 +1096,12 @@ virStorageBackendRBDSnapshotCreate(rbd_image_t image, char *imgname, char *snapname) { - int r = -1; + int rc = -1; VIR_DEBUG("Creating RBD snapshot %s@%s", imgname, snapname); - if ((r = rbd_snap_create(image, snapname)) < 0) { - virReportSystemError(-r, _("failed to create RBD snapshot %s@%s"), + if ((rc = rbd_snap_create(image, snapname)) < 0) { + virReportSystemError(-rc, _("failed to create RBD snapshot %s@%s"), imgname, snapname); return -1; } @@ -1121,13 +1114,13 @@ virStorageBackendRBDSnapshotProtect(rbd_image_t image, char *imgname, char *snapname) { - int r = -1; + int rc = -1; int protected; VIR_DEBUG("Querying if RBD snapshot %s@%s is protected", imgname, snapname); - if ((r = rbd_snap_is_protected(image, snapname, &protected)) < 0) { - virReportSystemError(-r, _("failed to verify if RBD snapshot %s@%s " + if ((rc = rbd_snap_is_protected(image, snapname, &protected)) < 0) { + virReportSystemError(-rc, _("failed to verify if RBD snapshot %s@%s " "is protected"), imgname, snapname); return -1; } @@ -1136,8 +1129,8 @@ virStorageBackendRBDSnapshotProtect(rbd_image_t image, VIR_DEBUG("RBD Snapshot %s@%s is not protected, protecting", imgname, snapname); - if ((r = rbd_snap_protect(image, snapname)) < 0) { - virReportSystemError(-r, _("failed to protect RBD snapshot %s@%s"), + if ((rc = rbd_snap_protect(image, snapname)) < 0) { + virReportSystemError(-rc, _("failed to protect RBD snapshot %s@%s"), imgname, snapname); return -1; } @@ -1153,8 +1146,7 @@ virStorageBackendRBDCloneImage(rados_ioctx_t io, char *origvol, char *newvol) { - int r = -1; - int ret = -1; + int rc, ret = -1; int order = 0; uint64_t features; uint64_t stripe_count; @@ -1163,8 +1155,8 @@ virStorageBackendRBDCloneImage(rados_ioctx_t io, rbd_image_t image = NULL; g_autofree char *snapname_buff = NULL; - if ((r = rbd_open(io, origvol, &image, NULL)) < 0) { - virReportSystemError(-r, _("failed to open the RBD image %s"), + if ((rc = rbd_open(io, origvol, &image, NULL)) < 0) { + virReportSystemError(-rc, _("failed to open the RBD image %s"), origvol); goto cleanup; } @@ -1211,14 +1203,14 @@ virStorageBackendRBDCloneImage(rados_ioctx_t io, * RBD snapshots have to be 'protected' before they can be used * as a parent snapshot for a child image */ - if ((r = virStorageBackendRBDSnapshotProtect(image, origvol, snapname_buff)) < 0) + if ((rc = virStorageBackendRBDSnapshotProtect(image, origvol, snapname_buff)) < 0) goto cleanup; VIR_DEBUG("Performing RBD clone from %s to %s", origvol, newvol); - if ((r = rbd_clone2(io, origvol, snapname_buff, io, newvol, features, + if ((rc = rbd_clone2(io, origvol, snapname_buff, io, newvol, features, &order, stripe_unit, stripe_count)) < 0) { - virReportSystemError(-r, _("failed to clone RBD volume %s to %s"), + virReportSystemError(-rc, _("failed to clone RBD volume %s to %s"), origvol, newvol); goto cleanup; } @@ -1293,22 +1285,21 @@ virStorageBackendRBDResizeVol(virStoragePoolObjPtr pool, { virStorageBackendRBDStatePtr ptr = NULL; rbd_image_t image = NULL; - int ret = -1; - int r = 0; + int rc, ret = -1; virCheckFlags(0, -1); if (!(ptr = virStorageBackendRBDNewState(pool))) goto cleanup; - if ((r = rbd_open(ptr->ioctx, vol->name, &image, NULL)) < 0) { - virReportSystemError(-r, _("failed to open the RBD image '%s'"), + if ((rc = rbd_open(ptr->ioctx, vol->name, &image, NULL)) < 0) { + virReportSystemError(-rc, _("failed to open the RBD image '%s'"), vol->name); goto cleanup; } - if ((r = rbd_resize(image, capacity)) < 0) { - virReportSystemError(-r, _("failed to resize the RBD image '%s'"), + if ((rc = rbd_resize(image, capacity)) < 0) { + virReportSystemError(-rc, _("failed to resize the RBD image '%s'"), vol->name); goto cleanup; } @@ -1328,7 +1319,7 @@ virStorageBackendRBDVolWipeZero(rbd_image_t image, rbd_image_info_t *info, uint64_t stripe_count) { - int r = -1; + int rc; unsigned long long offset = 0; unsigned long long length; g_autofree char *writebuf = NULL; @@ -1339,8 +1330,8 @@ virStorageBackendRBDVolWipeZero(rbd_image_t image, while (offset < info->size) { length = MIN((info->size - offset), (info->obj_size * stripe_count)); - if ((r = rbd_write(image, offset, length, writebuf)) < 0) { - virReportSystemError(-r, _("writing %llu bytes failed on " + if ((rc = rbd_write(image, offset, length, writebuf)) < 0) { + virReportSystemError(-rc, _("writing %llu bytes failed on " "RBD image %s at offset %llu"), length, imgname, offset); return -1; @@ -1361,7 +1352,7 @@ virStorageBackendRBDVolWipeDiscard(rbd_image_t image, rbd_image_info_t *info, uint64_t stripe_count) { - int r = -1; + int rc = -1; unsigned long long offset = 0; unsigned long long length; @@ -1370,8 +1361,8 @@ virStorageBackendRBDVolWipeDiscard(rbd_image_t image, while (offset < info->size) { length = MIN((info->size - offset), (info->obj_size * stripe_count)); - if ((r = rbd_discard(image, offset, length)) < 0) { - virReportSystemError(-r, _("discarding %llu bytes failed on " + if ((rc = rbd_discard(image, offset, length)) < 0) { + virReportSystemError(-rc, _("discarding %llu bytes failed on " "RBD image %s at offset %llu"), length, imgname, offset); return -1; @@ -1397,8 +1388,7 @@ virStorageBackendRBDVolWipe(virStoragePoolObjPtr pool, rbd_image_t image = NULL; rbd_image_info_t info; uint64_t stripe_count; - int r = -1; - int ret = -1; + int rc, ret = -1; virCheckFlags(0, -1); @@ -1411,20 +1401,20 @@ virStorageBackendRBDVolWipe(virStoragePoolObjPtr pool, if (!ptr) goto cleanup; - if ((r = rbd_open(ptr->ioctx, vol->name, &image, NULL)) < 0) { - virReportSystemError(-r, _("failed to open the RBD image %s"), + if ((rc = rbd_open(ptr->ioctx, vol->name, &image, NULL)) < 0) { + virReportSystemError(-rc, _("failed to open the RBD image %s"), vol->name); goto cleanup; } - if ((r = rbd_stat(image, &info, sizeof(info))) < 0) { - virReportSystemError(-r, _("failed to stat the RBD image %s"), + if ((rc = rbd_stat(image, &info, sizeof(info))) < 0) { + virReportSystemError(-rc, _("failed to stat the RBD image %s"), vol->name); goto cleanup; } - if ((r = rbd_get_stripe_count(image, &stripe_count)) < 0) { - virReportSystemError(-r, _("failed to get stripe count of RBD image %s"), + if ((rc = rbd_get_stripe_count(image, &stripe_count)) < 0) { + virReportSystemError(-rc, _("failed to get stripe count of RBD image %s"), vol->name); goto cleanup; } @@ -1434,11 +1424,11 @@ virStorageBackendRBDVolWipe(virStoragePoolObjPtr pool, switch ((virStorageVolWipeAlgorithm) algorithm) { case VIR_STORAGE_VOL_WIPE_ALG_ZERO: - r = virStorageBackendRBDVolWipeZero(image, vol->name, + rc = virStorageBackendRBDVolWipeZero(image, vol->name, &info, stripe_count); break; case VIR_STORAGE_VOL_WIPE_ALG_TRIM: - r = virStorageBackendRBDVolWipeDiscard(image, vol->name, + rc = virStorageBackendRBDVolWipeDiscard(image, vol->name, &info, stripe_count); break; case VIR_STORAGE_VOL_WIPE_ALG_NNSA: @@ -1455,8 +1445,8 @@ virStorageBackendRBDVolWipe(virStoragePoolObjPtr pool, goto cleanup; } - if (r < 0) { - virReportSystemError(-r, _("failed to wipe RBD image %s"), + if (rc < 0) { + virReportSystemError(-rc, _("failed to wipe RBD image %s"), vol->name); goto cleanup; } -- 2.7.5