/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*- * vim:expandtab:shiftwidth=8:tabstop=8: * * lustre/mds/mds_orphan.c * * Copyright (c) 2001-2003 Cluster File Systems, Inc. * Author: Peter Braam * Author: Andreas Dilger * Author: Phil Schwan * * This file is part of the Lustre file system, http://www.lustre.org * Lustre is a trademark of Cluster File Systems, Inc. * * You may have signed or agreed to another license before downloading * this software. If so, you are bound by the terms and conditions * of that agreement, and the following does not apply to you. See the * LICENSE file included with this distribution for more information. * * If you did not agree to a different license, then this copy of Lustre * is open source software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * In either case, Lustre is distributed in the hope that it will be * useful, but WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * license text for more details. */ /* code for handling open unlinked files */ #define DEBUG_SUBSYSTEM S_MDS #ifndef AUTOCONF_INCLUDED #include #endif #include #include #include #include #include #include #include #include #include "mds_internal.h" int mds_osc_destroy_orphan(struct obd_device *obd, umode_t mode, struct lov_mds_md *lmm, int lmm_size, struct llog_cookie *logcookies, int log_unlink) { struct mds_obd *mds = &obd->u.mds; struct lov_stripe_md *lsm = NULL; struct obd_trans_info oti = { 0 }; struct obdo *oa; int rc; ENTRY; if (lmm_size == 0) RETURN(0); rc = obd_unpackmd(mds->mds_osc_exp, &lsm, lmm, lmm_size); if (rc < 0) { CERROR("Error unpack md %p\n", lmm); RETURN(rc); } else { LASSERT(rc >= sizeof(*lsm)); rc = 0; } rc = obd_checkmd(mds->mds_osc_exp, obd->obd_self_export, lsm); if (rc) GOTO(out_free_memmd, rc); OBDO_ALLOC(oa); if (oa == NULL) GOTO(out_free_memmd, rc = -ENOMEM); oa->o_id = lsm->lsm_object_id; oa->o_gr = lsm->lsm_object_gr; oa->o_mode = mode & S_IFMT; oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | OBD_MD_FLGROUP; if (log_unlink && logcookies) { oa->o_valid |= OBD_MD_FLCOOKIE; oti.oti_logcookies = logcookies; } rc = obd_destroy(mds->mds_osc_exp, oa, lsm, &oti, obd->obd_self_export); OBDO_FREE(oa); if (rc) CDEBUG(D_INODE, "destroy orphan objid 0x"LPX64" on ost error " "%d\n", lsm->lsm_object_id, rc); out_free_memmd: obd_free_memmd(mds->mds_osc_exp, &lsm); RETURN(rc); } static int mds_unlink_orphan(struct obd_device *obd, struct dentry *dchild, struct inode *inode, struct inode *pending_dir) { struct mds_obd *mds = &obd->u.mds; struct lov_mds_md *lmm = NULL; struct llog_cookie *logcookies = NULL; int lmm_size, log_unlink = 0, cookie_size = 0; void *handle = NULL; umode_t mode; int rc, err; ENTRY; LASSERT(mds->mds_osc_obd != NULL); /* We don't need to do any of these other things for orhpan dirs, * especially not mds_get_md (may get a default LOV EA, bug 4554) */ mode = inode->i_mode; if (S_ISDIR(mode)) { rc = vfs_rmdir(pending_dir, dchild); if (rc) CERROR("error %d unlinking dir %*s from PENDING\n", rc, dchild->d_name.len, dchild->d_name.name); RETURN(rc); } lmm_size = mds->mds_max_mdsize; OBD_ALLOC(lmm, lmm_size); if (lmm == NULL) RETURN(-ENOMEM); rc = mds_get_md(obd, inode, lmm, &lmm_size, 1); if (rc < 0) GOTO(out_free_lmm, rc); handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK, NULL, le32_to_cpu(lmm->lmm_stripe_count)); if (IS_ERR(handle)) { rc = PTR_ERR(handle); CERROR("error fsfilt_start: %d\n", rc); handle = NULL; GOTO(out_free_lmm, rc); } rc = vfs_unlink(pending_dir, dchild); if (rc) { CERROR("error %d unlinking orphan %.*s from PENDING\n", rc, dchild->d_name.len, dchild->d_name.name); } else if (lmm_size) { cookie_size = mds_get_cookie_size(obd, lmm); OBD_ALLOC(logcookies, cookie_size); if (logcookies == NULL) rc = -ENOMEM; else if (mds_log_op_unlink(obd, lmm,lmm_size,logcookies, cookie_size) > 0) log_unlink = 1; } err = fsfilt_commit(obd, pending_dir, handle, 0); if (err) { CERROR("error committing orphan unlink: %d\n", err); if (!rc) rc = err; } else if (!rc) { rc = mds_osc_destroy_orphan(obd, mode, lmm, lmm_size, logcookies, log_unlink); } if (logcookies != NULL) OBD_FREE(logcookies, cookie_size); out_free_lmm: OBD_FREE(lmm, mds->mds_max_mdsize); RETURN(rc); } /* Delete inodes which were previously open-unlinked but were not reopened * during MDS recovery for whatever reason (e.g. client also failed, recovery * aborted, etc). */ int mds_cleanup_pending(struct obd_device *obd) { struct mds_obd *mds = &obd->u.mds; struct lvfs_run_ctxt saved; struct file *file; struct dentry *dchild, *dentry; struct vfsmount *mnt; struct inode *child_inode, *pending_dir = mds->mds_pending_dir->d_inode; struct l_linux_dirent *dirent, *n; struct list_head dentry_list; char d_name[LL_FID_NAMELEN]; unsigned long inum; int i = 0, rc = 0, item = 0, namlen; ENTRY; push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); /* dentry and mnt ref dropped in dentry_open() on error, or * in filp_close() if dentry_open() succeeds */ dentry = dget(mds->mds_pending_dir); if (IS_ERR(dentry)) GOTO(err_pop, rc = PTR_ERR(dentry)); mnt = mntget(mds->mds_vfsmnt); if (IS_ERR(mnt)) GOTO(err_mntget, rc = PTR_ERR(mnt)); file = dentry_open(mds->mds_pending_dir, mds->mds_vfsmnt, O_RDONLY | O_LARGEFILE); if (IS_ERR(file)) GOTO(err_pop, rc = PTR_ERR(file)); CFS_INIT_LIST_HEAD(&dentry_list); rc = l_readdir(file, &dentry_list); filp_close(file, 0); if (rc < 0) GOTO(err_out, rc); list_for_each_entry_safe(dirent, n, &dentry_list, lld_list) { i++; list_del(&dirent->lld_list); namlen = strlen(dirent->lld_name); LASSERT(sizeof(d_name) >= namlen + 1); strcpy(d_name, dirent->lld_name); inum = dirent->lld_ino; OBD_FREE(dirent, sizeof(*dirent)); CDEBUG(D_INODE, "entry %d of PENDING DIR: %s\n", i, d_name); if (((namlen == 1) && !strcmp(d_name, ".")) || ((namlen == 2) && !strcmp(d_name, "..")) || inum == 0) continue; LOCK_INODE_MUTEX(pending_dir); dchild = lookup_one_len(d_name, mds->mds_pending_dir, namlen); if (IS_ERR(dchild)) { UNLOCK_INODE_MUTEX(pending_dir); GOTO(err_out, rc = PTR_ERR(dchild)); } if (!dchild->d_inode) { CWARN("%s: orphan %s has already been removed\n", obd->obd_name, d_name); GOTO(next, rc = 0); } if (is_bad_inode(dchild->d_inode)) { CERROR("%s: bad orphan inode found %lu/%u\n", obd->obd_name, dchild->d_inode->i_ino, dchild->d_inode->i_generation); GOTO(next, rc = -ENOENT); } child_inode = dchild->d_inode; MDS_DOWN_READ_ORPHAN_SEM(child_inode); if (mds_inode_is_orphan(child_inode) && mds_orphan_open_count(child_inode)) { MDS_UP_READ_ORPHAN_SEM(child_inode); CWARN("%s: orphan %s re-opened during recovery\n", obd->obd_name, d_name); GOTO(next, rc = 0); } MDS_UP_READ_ORPHAN_SEM(child_inode); rc = mds_unlink_orphan(obd, dchild, child_inode, pending_dir); CDEBUG(D_INODE, "%s: removed orphan %s: rc %d\n", obd->obd_name, d_name, rc); if (rc == 0) item++; else rc = 0; next: l_dput(dchild); UNLOCK_INODE_MUTEX(pending_dir); } rc = 0; err_out: list_for_each_entry_safe(dirent, n, &dentry_list, lld_list) { list_del(&dirent->lld_list); OBD_FREE(dirent, sizeof(*dirent)); } err_pop: pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL); if (item > 0) CWARN("%s: removed %d pending open-unlinked files\n", obd->obd_name, item); RETURN(rc); err_mntget: l_dput(mds->mds_pending_dir); goto err_pop; }