1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * lustre/mds/mds_orphan.c
6 * Copyright (c) 2001-2003 Cluster File Systems, Inc.
7 * Author: Peter Braam <braam@clusterfs.com>
8 * Author: Andreas Dilger <adilger@clusterfs.com>
9 * Author: Phil Schwan <phil@clusterfs.com>
11 * This file is part of Lustre, http://www.lustre.org.
13 * Lustre is free software; you can redistribute it and/or
14 * modify it under the terms of version 2 of the GNU General Public
15 * License as published by the Free Software Foundation.
17 * Lustre is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with Lustre; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 /* code for handling open unlinked files */
29 #define DEBUG_SUBSYSTEM S_MDS
31 #include <linux/config.h>
32 #include <linux/module.h>
33 #include <linux/version.h>
35 #include <portals/list.h>
36 #include <linux/obd_class.h>
37 #include <linux/lustre_fsfilt.h>
38 #include <linux/lustre_commit_confd.h>
39 #include <linux/lvfs.h>
41 #include "mds_internal.h"
44 /* If we are unlinking an open file/dir (i.e. creating an orphan) then
45 * we instead link the inode into the PENDING directory until it is
46 * finally released. We can't simply call mds_reint_rename() or some
47 * part thereof, because we don't have the inode to check for link
48 * count/open status until after it is locked.
50 * For lock ordering, we always get the PENDING, then pending_child lock
51 * last to avoid deadlocks.
54 int mds_open_unlink_rename(struct mds_update_record *rec,
55 struct obd_device *obd, struct dentry *dparent,
56 struct dentry *dchild, void **handle)
58 struct mds_obd *mds = &obd->u.mds;
59 struct inode *pending_dir = mds->mds_pending_dir->d_inode;
60 struct dentry *pending_child;
61 char fidname[LL_FID_NAMELEN];
66 LASSERT(!mds_inode_is_orphan(dchild->d_inode));
68 down(&pending_dir->i_sem);
69 fidlen = ll_fid2str(fidname, dchild->d_inode->i_ino,
70 dchild->d_inode->i_generation);
72 CDEBUG(D_HA, "pending destroy of %dx open file %s = %s\n",
73 mds_open_orphan_count(dchild->d_inode), rec->ur_name, fidname);
75 pending_child = lookup_one_len(fidname, mds->mds_pending_dir, fidlen);
76 if (IS_ERR(pending_child))
77 GOTO(out_lock, rc = PTR_ERR(pending_child));
79 if (pending_child->d_inode != NULL) {
80 CERROR("re-destroying orphan file %s?\n", rec->ur_name);
81 LASSERT(pending_child->d_inode == dchild->d_inode);
82 GOTO(out_dput, rc = 0);
85 /* link() is semanticaly-wrong for S_IFDIR, so we set S_IFREG
86 * for linking and return real mode back then -bzzz */
87 mode = dchild->d_inode->i_mode;
88 dchild->d_inode->i_mode = S_IFREG;
89 rc = vfs_link(dchild, pending_dir, pending_child);
91 CERROR("error linking orphan %s to PENDING: rc = %d\n",
94 mds_inode_set_orphan(dchild->d_inode);
96 /* return mode and correct i_nlink if inode is directory */
97 LASSERT(dchild->d_inode->i_nlink == 1);
98 dchild->d_inode->i_mode = mode;
99 if ((mode & S_IFMT) == S_IFDIR) {
100 dchild->d_inode->i_nlink++;
101 pending_dir->i_nlink++;
103 mark_inode_dirty(dchild->d_inode);
108 up(&pending_dir->i_sem);
112 static int mds_osc_destroy_orphan(struct mds_obd *mds,
114 struct lov_mds_md *lmm,
116 struct llog_cookie *logcookies,
119 struct lov_stripe_md *lsm = NULL;
120 struct obd_trans_info oti = { 0 };
128 rc = obd_unpackmd(mds->mds_osc_exp, &lsm, lmm, lmm_size);
130 CERROR("Error unpack md %p\n", lmm);
133 LASSERT(rc >= sizeof(*lsm));
139 GOTO(out_free_memmd, rc = -ENOMEM);
140 oa->o_id = lsm->lsm_object_id;
141 oa->o_mode = inode->i_mode & S_IFMT;
142 oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE;
144 if (log_unlink && logcookies) {
145 oa->o_valid |= OBD_MD_FLCOOKIE;
146 oti.oti_logcookies = logcookies;
149 rc = obd_destroy(mds->mds_osc_exp, oa, lsm, &oti);
152 CDEBUG(D_INODE, "destroy orphan objid 0x"LPX64" on ost error "
153 "%d\n", lsm->lsm_object_id, rc);
155 obd_free_memmd(mds->mds_osc_exp, &lsm);
159 static int mds_unlink_orphan(struct obd_device *obd, struct dentry *dchild,
160 struct inode *inode, struct inode *pending_dir)
162 struct mds_obd *mds = &obd->u.mds;
163 struct lov_mds_md *lmm = NULL;
164 struct llog_cookie *logcookies = NULL;
165 int lmm_size = 0, log_unlink = 0;
170 LASSERT(mds->mds_osc_obd != NULL);
172 OBD_ALLOC(lmm, mds->mds_max_mdsize);
177 rc = fsfilt_get_md(obd, inode, lmm, mds->mds_max_mdsize);
181 CERROR("Error %d reading eadata for ino %lu\n",
183 GOTO(out_free_lmm, rc);
186 rc = mds_convert_lov_ea(obd, inode, lmm, lmm_size);
192 handle = fsfilt_start_log(obd, pending_dir, FSFILT_OP_UNLINK, NULL,
193 le32_to_cpu(lmm->lmm_stripe_count));
194 if (IS_ERR(handle)) {
195 rc = PTR_ERR(handle);
196 CERROR("error fsfilt_start: %d\n", rc);
198 GOTO(out_free_lmm, rc);
202 rc = fsfilt_get_md(obd, inode, lmm, mds->mds_max_mdsize);
206 CERROR("Error %d reading eadata for ino %lu\n",
208 GOTO(out_free_lmm, rc);
214 if (S_ISDIR(inode->i_mode))
215 rc = vfs_rmdir(pending_dir, dchild);
217 rc = vfs_unlink(pending_dir, dchild);
220 CERROR("error %d unlinking orphan %*s from PENDING directory\n",
221 rc, dchild->d_name.len, dchild->d_name.name);
223 if (!rc && lmm_size) {
224 OBD_ALLOC(logcookies, mds->mds_max_cookiesize);
225 if (logcookies == NULL)
227 else if (mds_log_op_unlink(obd, inode, lmm,lmm_size,logcookies,
228 mds->mds_max_cookiesize) > 0)
231 err = fsfilt_commit(obd, pending_dir, handle, 0);
233 CERROR("error committing orphan unlink: %d\n", err);
238 rc = mds_osc_destroy_orphan(mds, inode, lmm, lmm_size,
239 logcookies, log_unlink);
242 if (logcookies != NULL)
243 OBD_FREE(logcookies, mds->mds_max_cookiesize);
245 OBD_FREE(lmm, mds->mds_max_mdsize);
249 int mds_cleanup_orphans(struct obd_device *obd)
251 struct mds_obd *mds = &obd->u.mds;
252 struct lvfs_run_ctxt saved;
254 struct dentry *dchild, *dentry;
255 struct vfsmount *mnt;
256 struct inode *child_inode, *pending_dir = mds->mds_pending_dir->d_inode;
257 struct l_linux_dirent *dirent, *n;
258 struct list_head dentry_list;
259 char d_name[LL_FID_NAMELEN];
261 int rc = 0, item = 0, namlen;
264 push_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
265 dentry = dget(mds->mds_pending_dir);
267 GOTO(err_pop, rc = PTR_ERR(dentry));
268 mnt = mntget(mds->mds_vfsmnt);
270 GOTO(err_mntget, rc = PTR_ERR(mnt));
272 file = dentry_open(mds->mds_pending_dir, mds->mds_vfsmnt,
273 O_RDONLY | O_LARGEFILE);
275 GOTO(err_pop, rc = PTR_ERR(file));
277 INIT_LIST_HEAD(&dentry_list);
278 rc = l_readdir(file, &dentry_list);
283 list_for_each_entry_safe(dirent, n, &dentry_list, lld_list) {
285 list_del(&dirent->lld_list);
287 namlen = strlen(dirent->lld_name);
288 LASSERT(sizeof(d_name) >= namlen + 1);
289 strcpy(d_name, dirent->lld_name);
290 OBD_FREE(dirent, sizeof(*dirent));
292 CDEBUG(D_INODE, "entry "LPU64" of PENDING DIR: %s\n",
295 if (((namlen == 1) && !strcmp(d_name, ".")) ||
296 ((namlen == 2) && !strcmp(d_name, ".."))) {
300 down(&pending_dir->i_sem);
301 dchild = lookup_one_len(d_name, mds->mds_pending_dir, namlen);
302 if (IS_ERR(dchild)) {
303 up(&pending_dir->i_sem);
304 GOTO(err_out, rc = PTR_ERR(dchild));
306 if (!dchild->d_inode) {
307 CERROR("orphan %s has been removed\n", d_name);
311 child_inode = dchild->d_inode;
312 if (mds_inode_is_orphan(child_inode) &&
313 mds_open_orphan_count(child_inode)) {
314 CWARN("orphan %s was re-opened during recovery\n", d_name);
318 rc = mds_unlink_orphan(obd, dchild, child_inode, pending_dir);
321 CWARN("removed orphan %s from MDS and OST\n", d_name);
323 CDEBUG(D_INODE, "removed orphan %s from MDS/OST failed,"
324 " rc = %d\n", d_name, rc);
329 up(&pending_dir->i_sem);
332 list_for_each_entry_safe(dirent, n, &dentry_list, lld_list) {
333 list_del(&dirent->lld_list);
334 OBD_FREE(dirent, sizeof(*dirent));
337 pop_ctxt(&saved, &obd->obd_lvfs_ctxt, NULL);
343 l_dput(mds->mds_pending_dir);