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git://sourceware.org/git/lvm2.git
synced 2024-12-21 13:34:40 +03:00
toollib: handle duplicate pvs in process_in_pv
Processes a PV once for each time a device with its PV ID exists on the command line. This fixes a regression in the case where: . devices /dev/sdA and /dev/sdB where clones (same PV ID) . the cached VG references /dev/sdA . before the regression, the command: pvs /dev/sdB would display the cached device clone /dev/sdA . after the regression, pvs /dev/sdB would display nothing, causing vgimportclone /dev/sdB to fail. . with this fix, pvs /dev/sdB displays /dev/sdA Also, pvs /dev/sdA /dev/sdB will report two lines, one for each device on the command line, but /dev/sdA is displayed for each. This only works without lvmetad.
This commit is contained in:
David Teigland
parent
eac4e1e939
commit
c1f246fedf
139
tools/toollib.c
139
tools/toollib.c
@ -18,6 +18,12 @@
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#include <signal.h>
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#include <sys/wait.h>
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struct device_id_list {
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struct dm_list list;
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struct device *dev;
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char pvid[ID_LEN + 1];
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};
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const char *command_name(struct cmd_context *cmd)
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{
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return cmd->command->name;
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@ -2079,20 +2085,21 @@ static int _get_arg_devices(struct cmd_context *cmd,
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struct dm_list *arg_devices)
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{
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struct dm_str_list *sl;
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struct device_list *devl;
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struct device_id_list *dil;
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int ret_max = ECMD_PROCESSED;
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dm_list_iterate_items(sl, arg_pvnames) {
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if (!(devl = dm_pool_alloc(cmd->mem, sizeof(*devl)))) {
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log_error("device_list alloc failed.");
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if (!(dil = dm_pool_alloc(cmd->mem, sizeof(*dil)))) {
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log_error("device_id_list alloc failed.");
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return ECMD_FAILED;
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}
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if (!(devl->dev = dev_cache_get(sl->str, cmd->filter))) {
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log_error("Failed to find physical volume \"%s\".", sl->str);
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if (!(dil->dev = dev_cache_get(sl->str, cmd->filter))) {
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log_error("Failed to find device for physical volume \"%s\".", sl->str);
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ret_max = ECMD_FAILED;
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} else {
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dm_list_add(arg_devices, &devl->list);
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strncpy(dil->pvid, dil->dev->pvid, ID_LEN);
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dm_list_add(arg_devices, &dil->list);
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}
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}
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@ -2103,7 +2110,7 @@ static int _get_all_devices(struct cmd_context *cmd, struct dm_list *all_devices
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{
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struct dev_iter *iter;
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struct device *dev;
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struct device_list *devl;
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struct device_id_list *dil;
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int r = ECMD_FAILED;
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lvmcache_seed_infos_from_lvmetad(cmd);
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@ -2114,13 +2121,13 @@ static int _get_all_devices(struct cmd_context *cmd, struct dm_list *all_devices
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}
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while ((dev = dev_iter_get(iter))) {
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if (!(devl = dm_pool_alloc(cmd->mem, sizeof(*devl)))) {
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log_error("device_list alloc failed.");
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if (!(dil = dm_pool_alloc(cmd->mem, sizeof(*dil)))) {
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log_error("device_id_list alloc failed.");
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goto out;
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}
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devl->dev = dev;
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dm_list_add(all_devices, &devl->list);
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dil->dev = dev;
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dm_list_add(all_devices, &dil->list);
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}
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r = ECMD_PROCESSED;
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@ -2129,13 +2136,13 @@ out:
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return r;
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}
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static int _device_list_remove(struct dm_list *all_devices, struct device *dev)
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static int _device_list_remove(struct dm_list *devices, struct device *dev)
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{
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struct device_list *devl;
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struct device_id_list *dil;
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dm_list_iterate_items(devl, all_devices) {
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if (devl->dev == dev) {
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dm_list_del(&devl->list);
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dm_list_iterate_items(dil, devices) {
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if (dil->dev == dev) {
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dm_list_del(&dil->list);
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return 1;
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}
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}
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@ -2143,16 +2150,28 @@ static int _device_list_remove(struct dm_list *all_devices, struct device *dev)
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return 0;
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}
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static int _device_list_match(struct dm_list *devices, struct device *dev)
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static struct device_id_list *_device_list_find_dev(struct dm_list *devices, struct device *dev)
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{
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struct device_list *devl;
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struct device_id_list *dil;
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dm_list_iterate_items(devl, devices) {
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if (devl->dev == dev)
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return 1;
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dm_list_iterate_items(dil, devices) {
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if (dil->dev == dev)
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return dil;
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}
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return 0;
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return NULL;
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}
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static struct device_id_list *_device_list_find_pvid(struct dm_list *devices, struct physical_volume *pv)
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{
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struct device_id_list *dil;
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dm_list_iterate_items(dil, devices) {
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if (id_equal((struct id *) dil->pvid, &pv->id))
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return dil;
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}
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return NULL;
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}
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static int _process_device_list(struct cmd_context *cmd, struct dm_list *all_devices,
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@ -2160,7 +2179,7 @@ static int _process_device_list(struct cmd_context *cmd, struct dm_list *all_dev
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{
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struct physical_volume pv_dummy;
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struct physical_volume *pv;
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struct device_list *devl;
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struct device_id_list *dil;
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int ret_max = ECMD_PROCESSED;
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int ret = 0;
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@ -2168,17 +2187,17 @@ static int _process_device_list(struct cmd_context *cmd, struct dm_list *all_dev
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* Pretend that each device is a PV with dummy values.
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* FIXME Formalise this extension or find an alternative.
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*/
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dm_list_iterate_items(devl, all_devices) {
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dm_list_iterate_items(dil, all_devices) {
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if (sigint_caught())
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return_ECMD_FAILED;
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memset(&pv_dummy, 0, sizeof(pv_dummy));
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dm_list_init(&pv_dummy.tags);
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dm_list_init(&pv_dummy.segments);
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pv_dummy.dev = devl->dev;
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pv_dummy.dev = dil->dev;
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pv = &pv_dummy;
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log_very_verbose("Processing device %s.", dev_name(devl->dev));
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log_very_verbose("Processing device %s.", dev_name(dil->dev));
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ret = process_single_pv(cmd, NULL, pv, handle);
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@ -2201,6 +2220,7 @@ static int _process_pvs_in_vg(struct cmd_context *cmd,
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{
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struct physical_volume *pv;
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struct pv_list *pvl;
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struct device_id_list *dil;
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const char *pv_name;
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int process_pv;
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int dev_found;
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@ -2219,9 +2239,17 @@ static int _process_pvs_in_vg(struct cmd_context *cmd,
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/* Remove each arg_devices entry as it is processed. */
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if (!process_pv && !dm_list_empty(arg_devices) &&
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_device_list_match(arg_devices, pv->dev)) {
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(dil = _device_list_find_dev(arg_devices, pv->dev))) {
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process_pv = 1;
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_device_list_remove(arg_devices, pv->dev);
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_device_list_remove(arg_devices, dil->dev);
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}
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/* Select the PV if the device arg has the same pvid. */
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if (!process_pv && !dm_list_empty(arg_devices) &&
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(dil = _device_list_find_pvid(arg_devices, pv))) {
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process_pv = 1;
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_device_list_remove(arg_devices, dil->dev);
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}
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if (!process_pv && !dm_list_empty(arg_tags) &&
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@ -2257,6 +2285,35 @@ static int _process_pvs_in_vg(struct cmd_context *cmd,
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if (ret > ret_max)
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ret_max = ret;
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}
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/*
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* This is a very rare and obscure case where multiple
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* duplicate devices are specified on the command line
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* referring to this PV. In this case we want to
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* process this PV once for each specified device.
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*/
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if (!skip && !dm_list_empty(arg_devices)) {
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while ((dil = _device_list_find_pvid(arg_devices, pv))) {
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_device_list_remove(arg_devices, dil->dev);
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/*
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* This will simply display the same PV
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* multiple times. Further changes would
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* be needed to make this display the details
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* of dil->dev instead of pv->dev.
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*/
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log_very_verbose("Processing PV %s device %s in VG %s.",
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pv_name, dev_name(dil->dev), vg->name);
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ret = process_single_pv(cmd, vg, pv, handle);
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if (ret != ECMD_PROCESSED)
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stack;
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if (ret > ret_max)
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ret_max = ret;
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}
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}
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}
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/*
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@ -2278,7 +2335,7 @@ static int _process_pvs_in_vg(struct cmd_context *cmd,
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* Each PV is removed from arg_devices and all_devices when it is
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* processed. Any names remaining in arg_devices were not found, and
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* should produce an error. Any devices remaining in all_devices were
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* not found and should be processed by process_all_devices().
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* not found and should be processed by process_device_list().
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*/
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static int _process_pvs_in_vgs(struct cmd_context *cmd, uint32_t flags,
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struct dm_list *all_vgnameids,
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@ -2347,10 +2404,10 @@ int process_each_pv(struct cmd_context *cmd,
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{
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struct dm_list arg_tags; /* str_list */
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struct dm_list arg_pvnames; /* str_list */
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struct dm_list arg_devices; /* device_list */
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struct dm_list arg_devices; /* device_id_list */
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struct dm_list all_vgnameids; /* vgnameid_list */
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struct dm_list all_devices; /* device_list */
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struct device_list *devl;
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struct dm_list all_devices; /* device_id_list */
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struct device_id_list *dil;
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int process_all_pvs;
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int process_all_devices;
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int ret_max = ECMD_PROCESSED;
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@ -2362,6 +2419,15 @@ int process_each_pv(struct cmd_context *cmd,
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dm_list_init(&all_vgnameids);
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dm_list_init(&all_devices);
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/*
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* Read all the vgs first because this has the effect of initializing
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* other device/lvmcache info that is needed when creating device lists.
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*/
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if ((ret = _get_vgnameids_on_system(cmd, &all_vgnameids, only_this_vgname, 1) != ECMD_PROCESSED)) {
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stack;
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return ret;
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}
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/*
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* Create two lists from argv:
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* arg_pvnames: pvs explicitly named in argv
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@ -2396,11 +2462,6 @@ int process_each_pv(struct cmd_context *cmd,
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return ret;
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}
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if ((ret = _get_vgnameids_on_system(cmd, &all_vgnameids, only_this_vgname, 1) != ECMD_PROCESSED)) {
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stack;
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return ret;
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}
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ret = _process_pvs_in_vgs(cmd, flags, &all_vgnameids, &all_devices,
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&arg_devices, &arg_tags, process_all_pvs,
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handle, process_single_pv);
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@ -2409,8 +2470,8 @@ int process_each_pv(struct cmd_context *cmd,
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if (ret > ret_max)
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ret_max = ret;
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dm_list_iterate_items(devl, &arg_devices) {
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log_error("Failed to find physical volume \"%s\".", dev_name(devl->dev));
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dm_list_iterate_items(dil, &arg_devices) {
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log_error("Failed to find physical volume \"%s\".", dev_name(dil->dev));
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ret_max = ECMD_FAILED;
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}
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