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openSUSE:Evergreen:11.2
device-mapper
lvm-pv-create-link.diff
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File lvm-pv-create-link.diff of Package device-mapper
Index: LVM2.2.02.45/tools/pvremove.c =================================================================== --- LVM2.2.02.45.orig/tools/pvremove.c 2009-04-27 16:35:32.000000000 +0800 +++ LVM2.2.02.45/tools/pvremove.c 2009-04-27 16:49:48.000000000 +0800 @@ -18,6 +18,30 @@ const char _really_wipe[] = "Really WIPE LABELS from physical volume \"%s\" of volume group \"%s\" [y/n]? "; +static const char* pv_remove_symlink(struct cmd_context* cmd, const char* name) +{ + struct physical_volume *pv; + char *pvuuid; + char pvuuid_link[70]; + + if (!(pv = pv_read(cmd, name, NULL, NULL, 0, 0))) { + return NULL; + } + + pvuuid = malloc(sizeof(char)*40); + if (pvuuid == NULL) { + return NULL; + } + + id_write_format(&pv->id, pvuuid, 40); + + snprintf(pvuuid_link, 70, "/dev/disk/by-id/lvm2-pvuuid-%s", pvuuid); + unlink(pvuuid_link); //we really don't care if it successed or not. + + free(pvuuid); + return pvuuid; +} + /* * Decide whether it is "safe" to wipe the labels on this device. * 0 indicates we may not. @@ -125,6 +149,8 @@ log_print("Labels on physical volume \"%s\" successfully wiped", pv_name); + pv_remove_symlink(cmd, pv_name); + ret = ECMD_PROCESSED; error: Index: LVM2.2.02.45/tools/pvcreate.c =================================================================== --- LVM2.2.02.45.orig/tools/pvcreate.c 2009-04-27 16:35:32.000000000 +0800 +++ LVM2.2.02.45/tools/pvcreate.c 2009-04-27 16:45:34.000000000 +0800 @@ -36,6 +36,89 @@ const char _really_init[] = "Really INITIALIZE physical volume \"%s\" of volume group \"%s\" [y/n]? "; +static const char* pv_follow_if_link (const char* path) +{ + int r; + int len = 60; + char *fpath = NULL; + char *npath = NULL; + struct stat st; + + r = lstat(path, &st); + if (r == -1) return NULL; //shouldn't happen + + if (S_ISLNK(st.st_mode)) { + while (1) { + npath = realloc(fpath, sizeof(char)*len); + if (npath == NULL) { + if (fpath != NULL) free(fpath); + return NULL; + } + fpath = npath; + + memset(fpath, 0, sizeof(char)*len); + r = readlink(path, fpath, len); + if (r != -1 && fpath[len-1] == 0) break; + if (r == -1) { + free(fpath); + return NULL; + } else { + len = len * 2; + } + } + } + else { + fpath = strdup(path); + } + return fpath; +} + + +static const char* pv_symlink_handle(struct cmd_context* cmd, const char* name, int create) +{ + struct physical_volume *pv; + char *pvuuid; + char *pvuuid_link; + + pvuuid_link = malloc(70); + if (pvuuid_link == NULL) return NULL; + + if (!(pv = pv_read(cmd, name, NULL, NULL, 0, 0))) { + free(pvuuid_link); + return NULL; + } + + pvuuid = malloc(sizeof(char)*40); + if (pvuuid == NULL) { + free(pvuuid_link); + return NULL; + } + + id_write_format(&pv->id, pvuuid, 40); + + snprintf(pvuuid_link, 70, "/dev/disk/by-id/lvm2-pvuuid-%s", pvuuid); + + //we really don't care if it successed or not. + if (create) { + const char* tname = NULL; + int r; + tname = pv_follow_if_link(name); + if (tname != NULL) { + r = symlink(tname, pvuuid_link); + free(tname); + } + else { + symlink(name, pvuuid_link); + } + } else { + //pvuuid_link is saved for future unlink + //unlink(pvuuid_link); + } + + free(pvuuid); + return pvuuid_link; +} + /* * See if we may pvcreate on this device. * 0 indicates we may not. @@ -150,6 +233,8 @@ void *pv; struct device *dev; struct dm_list mdas; + const char *oldsymlink; + if (pp->idp) { if ((dev = device_from_pvid(cmd, pp->idp)) && @@ -213,12 +298,22 @@ log_very_verbose("Writing physical volume data to disk \"%s\"", pv_name); + + oldsymlink = pv_symlink_handle(cmd, pv_name, 0); + if (!(pv_write(cmd, (struct physical_volume *)pv, &mdas, pp->labelsector))) { log_error("Failed to write physical volume \"%s\"", pv_name); + if (oldsymlink) free(oldsymlink); goto error; } + pv_symlink_handle(cmd, pv_name, 1); + if (oldsymlink) { + unlink(oldsymlink); + free(oldsymlink); + } + log_print("Physical volume \"%s\" successfully created", pv_name); unlock_vg(cmd, VG_ORPHANS); Index: LVM2.2.02.45/tools/pvchange.c =================================================================== --- LVM2.2.02.45.orig/tools/pvchange.c 2009-04-27 16:35:32.000000000 +0800 +++ LVM2.2.02.45/tools/pvchange.c 2009-04-27 16:45:18.000000000 +0800 @@ -15,6 +15,90 @@ #include "tools.h" +static const char* pv_follow_if_link (const char* path) +{ + int r; + int len = 60; + char *fpath = NULL; + char *npath = NULL; + struct stat st; + + r = lstat(path, &st); + if (r == -1) return NULL; //shouldn't happen + + if (S_ISLNK(st.st_mode)) { + while (1) { + npath = realloc(fpath, sizeof(char)*len); + if (npath == NULL) { + if (fpath != NULL) free(fpath); + return NULL; + } + fpath = npath; + + memset(fpath, 0, sizeof(char)*len); + r = readlink(path, fpath, len); + if (r != -1 && fpath[len-1] == 0) break; + if (r == -1) { + free(fpath); + return NULL; + } else { + len = len * 2; + } + } + } + else { + fpath = strdup(path); + } + return fpath; +} + +static const char* pv_symlink_handle(struct cmd_context* cmd, const char* name, int create) +{ + struct physical_volume *pv; + char *pvuuid; + char *pvuuid_link; + + pvuuid_link = malloc(70); + if (pvuuid_link == NULL) return NULL; + + + if (!(pv = pv_read(cmd, name, NULL, NULL, 0, 0))) { + free(pvuuid_link); + return NULL; + } + + pvuuid = malloc(sizeof(char)*40); + if (pvuuid == NULL) { + free(pvuuid_link); + return NULL; + } + + id_write_format(&pv->id, pvuuid, 40); + + snprintf(pvuuid_link, 70, "/dev/disk/by-id/lvm2-pvuuid-%s", pvuuid); + + //we really don't care if it successed or not. + if (create) { + const char* tname = NULL; + int r; + tname = pv_follow_if_link(name); + if (tname != NULL) { + r = symlink(tname, pvuuid_link); + free(tname); + } + else { + symlink(name, pvuuid_link); + } + } else { + //pvuuid_link is saved for future unlink + //unlink(pvuuid_link); + } + + free(pvuuid); + return pvuuid_link; +} + + /* FIXME Locking. PVs in VG. */ static int _pvchange_single(struct cmd_context *cmd, struct physical_volume *pv, @@ -202,11 +286,23 @@ return 0; } backup(vg); - } else if (!(pv_write(cmd, pv, NULL, INT64_C(-1)))) { - unlock_vg(cmd, vg_name); - log_error("Failed to store physical volume \"%s\"", - pv_name); - return 0; + } else { + const char* oldsymlink; + oldsymlink = pv_symlink_handle(cmd, pv_name, 0); + + if (!(pv_write(cmd, pv, NULL, INT64_C(-1)))) { + unlock_vg(cmd, vg_name); + log_error("Failed to store physical volume \"%s\"", + pv_name); + if (oldsymlink) free(oldsymlink); + return 0; + } + pv_symlink_handle(cmd, pv_name, 1); + if (oldsymlink) { + unlink(oldsymlink); + free(oldsymlink); + } + } unlock_vg(cmd, vg_name);
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