[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [PATCH v7 7/7] libxl / libxlu: support 'xl pci-attach/detach' by name
From: Paul Durrant <pdurrant@xxxxxxxxxx> This patch modifies libxlu_pci_parse_spec_string() to parse the new 'name' parameter of PCI_SPEC_STRING detailed in the updated documention in xl-pci-configuration(5) and populate the 'name' field of 'libxl_device_pci'. If the 'name' field is non-NULL then both libxl_device_pci_add() and libxl_device_pci_remove() will use it to look up the device BDF in the list of assignable devices. Signed-off-by: Paul Durrant <pdurrant@xxxxxxxxxx> --- Cc: Wei Liu <wl@xxxxxxx> Cc: Ian Jackson <iwj@xxxxxxxxxxxxxx> Cc: Anthony PERARD <anthony.perard@xxxxxxxxxx> v7: - Re-worked (mainly because 'libxl_device_pci' already has a 'name' field) - Dropped Wei's A-b because of the re-work v6: - Re-base - Slight modification to the patch name - Kept Wei's A-b since modifications are small --- tools/libs/light/libxl_pci.c | 43 ++++++++++++++++++++++++++++++++++++++----- tools/libs/util/libxlu_pci.c | 7 ++++++- 2 files changed, 44 insertions(+), 6 deletions(-) diff --git a/tools/libs/light/libxl_pci.c b/tools/libs/light/libxl_pci.c index 9e3a90dcda..1a1c263080 100644 --- a/tools/libs/light/libxl_pci.c +++ b/tools/libs/light/libxl_pci.c @@ -58,6 +58,8 @@ static void libxl_create_pci_backend_device(libxl__gc *gc, flexarray_append(back, GCSPRINTF(PCI_BDF, pci->domain, pci->bus, pci->dev, pci->func)); if (pci->vdevfn) flexarray_append_pair(back, GCSPRINTF("vdevfn-%d", num), GCSPRINTF("%x", pci->vdevfn)); + if (pci->name) + flexarray_append_pair(back, GCSPRINTF("name-%d", num), GCSPRINTF("%s", pci->name)); flexarray_append(back, GCSPRINTF("opts-%d", num)); flexarray_append(back, GCSPRINTF("msitranslate=%d,power_mgmt=%d,permissive=%d,rdm_policy=%s", @@ -282,6 +284,7 @@ retry_transaction2: xs_rm(ctx->xsh, t, GCSPRINTF("%s/vdev-%d", be_path, i)); xs_rm(ctx->xsh, t, GCSPRINTF("%s/opts-%d", be_path, i)); xs_rm(ctx->xsh, t, GCSPRINTF("%s/vdevfn-%d", be_path, i)); + xs_rm(ctx->xsh, t, GCSPRINTF("%s/name-%d", be_path, i)); libxl__xs_printf(gc, t, num_devs_path, "%d", num - 1); for (j = i + 1; j < num; j++) { tmppath = GCSPRINTF("%s/state-%d", be_path, j); @@ -314,6 +317,12 @@ retry_transaction2: xs_write(ctx->xsh, t, GCSPRINTF("%s/vdevfn-%d", be_path, j - 1), tmp, strlen(tmp)); xs_rm(ctx->xsh, t, tmppath); } + tmppath = GCSPRINTF("%s/name-%d", be_path, j); + tmp = libxl__xs_read(gc, t, tmppath); + if (tmp) { + xs_write(ctx->xsh, t, GCSPRINTF("%s/name-%d", be_path, j - 1), tmp, strlen(tmp)); + xs_rm(ctx->xsh, t, tmppath); + } } if (!xs_transaction_end(ctx->xsh, t, 0)) if (errno == EAGAIN) @@ -1589,6 +1598,12 @@ void libxl__device_pci_add(libxl__egc *egc, uint32_t domid, libxl_device_pci_copy(CTX, &pas->pci, pci); pci = &pas->pci; + /* If the device is named then we need to look up the BDF */ + if (pci->name) { + rc = name2bdf(gc, pci); + if (rc) goto out; + } + pas->starting = starting; pas->callback = device_pci_add_stubdom_done; @@ -1739,11 +1754,19 @@ static void device_pci_add_done(libxl__egc *egc, libxl_device_pci *pci = &pas->pci; if (rc) { - LOGD(ERROR, domid, - "libxl__device_pci_add failed for " - "PCI device %x:%x:%x.%x (rc %d)", - pci->domain, pci->bus, pci->dev, pci->func, - rc); + if (pci->name) { + LOGD(ERROR, domid, + "libxl__device_pci_add failed for " + "PCI device '%s' (rc %d)", + pci->name, + rc); + } else { + LOGD(ERROR, domid, + "libxl__device_pci_add failed for " + "PCI device %x:%x:%x.%x (rc %d)", + pci->domain, pci->bus, pci->dev, pci->func, + rc); + } pci_info_xs_remove(gc, pci, "domid"); } libxl_device_pci_dispose(pci); @@ -2250,6 +2273,12 @@ static void libxl__device_pci_remove_common(libxl__egc *egc, libxl_device_pci_copy(CTX, &prs->pci, pci); pci = &prs->pci; + /* If the device is named then we need to look up the BDF */ + if (pci->name) { + rc = name2bdf(gc, pci); + if (rc) goto out; + } + prs->force = force; libxl__xswait_init(&prs->xswait); libxl__ev_qmp_init(&prs->qmp); @@ -2372,6 +2401,10 @@ static int libxl__device_pci_from_xs_be(libxl__gc *gc, if (s) pci->vdevfn = strtol(s, (char **) NULL, 16); + s = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/name-%d", be_path, nr)); + if (s) + pci->name = strdup(s); + s = libxl__xs_read(gc, XBT_NULL, GCSPRINTF("%s/opts-%d", be_path, nr)); if (s) { char *saveptr; diff --git a/tools/libs/util/libxlu_pci.c b/tools/libs/util/libxlu_pci.c index 05472a0bd1..ad88fee088 100644 --- a/tools/libs/util/libxlu_pci.c +++ b/tools/libs/util/libxlu_pci.c @@ -147,6 +147,7 @@ int xlu_pci_parse_spec_string(XLU_Config *cfg, libxl_device_pci *pci, { const char *ptr = str; bool bdf_present = false; + bool name_present = false; int ret; /* Attempt to parse 'bdf' as positional parameter */ @@ -189,6 +190,10 @@ int xlu_pci_parse_spec_string(XLU_Config *cfg, libxl_device_pci *pci, pci->power_mgmt = atoi(val); } else if (!strcmp(key, "rdm_policy")) { ret = parse_rdm_policy(cfg, &pci->rdm_policy, val); + } else if (!strcmp(key, "name")) { + name_present = true; + pci->name = strdup(val); + if (!pci->name) ret = ERROR_NOMEM; } else { XLU__PCI_ERR(cfg, "Unknown PCI_SPEC_STRING option: %s", key); ret = ERROR_INVAL; @@ -201,7 +206,7 @@ int xlu_pci_parse_spec_string(XLU_Config *cfg, libxl_device_pci *pci, return ret; } - if (!bdf_present) + if (!(bdf_present ^ name_present)) return ERROR_INVAL; return 0; -- 2.11.0
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