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From: wysochanski@sourceware.org To: lvm-devel@redhat.com, lvm2-cvs@sourceware.org Subject: LVM2 ./WHATS_NEW tools/vgcreate.c Date: Mon, 01 Dec 2008 20:14:00 -0000 [thread overview] Message-ID: <20081201201433.21067.qmail@sourceware.org> (raw) CVSROOT: /cvs/lvm2 Module name: LVM2 Changes by: wysochanski@sourceware.org 2008-12-01 20:14:33 Modified files: . : WHATS_NEW tools : vgcreate.c Log message: Fix vgcreate race which could allow two parallel vgcreates to succeed, with the second vgcreate overwriting the first. Obtain lock before calling vg_create(), which checks for existence of vgname and fails if it already exists. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/WHATS_NEW.diff?cvsroot=lvm2&r1=1.1002&r2=1.1003 http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/tools/vgcreate.c.diff?cvsroot=lvm2&r1=1.57&r2=1.58 --- LVM2/WHATS_NEW 2008/12/01 17:38:35 1.1002 +++ LVM2/WHATS_NEW 2008/12/01 20:14:33 1.1003 @@ -1,5 +1,6 @@ Version 2.02.44 - ==================================== + Fix race in vgcreate that would result in second caller overwriting first. Fix uninitialised lv_count in vgdisplay -c. Don't skip updating pvid hash when lvmcache_info struct got swapped. Add tinfo to termcap search path for pld-linux. --- LVM2/tools/vgcreate.c 2008/04/08 14:22:13 1.57 +++ LVM2/tools/vgcreate.c 2008/12/01 20:14:33 1.58 @@ -46,11 +46,22 @@ if (validate_vg_create_params(cmd, &vp_new)) return EINVALID_CMD_LINE; + if (!lock_vol(cmd, VG_ORPHANS, LCK_VG_WRITE)) { + log_error("Can't get lock for orphan PVs"); + return ECMD_FAILED; + } + + if (!lock_vol(cmd, vp_new.vg_name, LCK_VG_WRITE | LCK_NONBLOCK)) { + log_error("Can't get lock for %s", vp_new.vg_name); + unlock_vg(cmd, VG_ORPHANS); + return ECMD_FAILED; + } + /* Create the new VG */ if (!(vg = vg_create(cmd, vp_new.vg_name, vp_new.extent_size, vp_new.max_pv, vp_new.max_lv, vp_new.alloc, argc - 1, argv + 1))) - return ECMD_FAILED; + goto bad; if (vp_new.max_lv != vg->max_lv) log_warn("WARNING: Setting maxlogicalvolumes to %d " @@ -63,18 +74,18 @@ if (arg_count(cmd, addtag_ARG)) { if (!(tag = arg_str_value(cmd, addtag_ARG, NULL))) { log_error("Failed to get tag"); - return ECMD_FAILED; + goto bad; } if (!(vg->fid->fmt->features & FMT_TAGS)) { log_error("Volume group format does not support tags"); - return ECMD_FAILED; + goto bad; } if (!str_list_add(cmd->mem, &vg->tags, tag)) { log_error("Failed to add tag %s to volume group %s", tag, vp_new.vg_name); - return ECMD_FAILED; + goto bad; } } @@ -88,28 +99,13 @@ clustered_message = "Non-clustered "; } - if (!lock_vol(cmd, VG_ORPHANS, LCK_VG_WRITE)) { - log_error("Can't get lock for orphan PVs"); - return ECMD_FAILED; - } - - if (!lock_vol(cmd, vp_new.vg_name, LCK_VG_WRITE | LCK_NONBLOCK)) { - log_error("Can't get lock for %s", vp_new.vg_name); - unlock_vg(cmd, VG_ORPHANS); - return ECMD_FAILED; - } - if (!archive(vg)) { - unlock_vg(cmd, vp_new.vg_name); - unlock_vg(cmd, VG_ORPHANS); - return ECMD_FAILED; + goto bad; } /* Store VG on disk(s) */ if (!vg_write(vg) || !vg_commit(vg)) { - unlock_vg(cmd, vp_new.vg_name); - unlock_vg(cmd, VG_ORPHANS); - return ECMD_FAILED; + goto bad; } unlock_vg(cmd, vp_new.vg_name); @@ -121,4 +117,9 @@ clustered_message, *clustered_message ? 'v' : 'V', vg->name); return ECMD_PROCESSED; + +bad: + unlock_vg(cmd, vp_new.vg_name); + unlock_vg(cmd, VG_ORPHANS); + return ECMD_FAILED; }
next reply other threads:[~2008-12-01 20:14 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2008-12-01 20:14 wysochanski [this message] 2009-12-03 19:20 mbroz
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