#include <lustre_quota.h>
#include <ldiskfs/xattr.h>
+#include <lustre_linkea.h>
int ldiskfs_pdo = 1;
CFS_MODULE_PARM(ldiskfs_pdo, "i", int, 0644,
}
/**
+ * Get parent FID from the linkEA.
+ *
+ * For a directory which parent resides on remote MDT, to satisfy the
+ * local e2fsck, we insert it into the /REMOTE_PARENT_DIR locally. On
+ * the other hand, to make the lookup(..) on the directory can return
+ * the real parent FID, we append the real parent FID after its ".."
+ * name entry in the /REMOTE_PARENT_DIR.
+ *
+ * Unfortunately, such PFID-in-dirent cannot be preserved via file-level
+ * backup. So after the restore, we cannot get the right parent FID from
+ * its ".." name entry in the /REMOTE_PARENT_DIR. Under such case, since
+ * we have stored the real parent FID in the directory object's linkEA,
+ * we can parse the linkEA for the real parent FID.
+ *
+ * \param[in] env pointer to the thread context
+ * \param[in] obj pointer to the object to be handled
+ * \param[out]fid pointer to the buffer to hold the parent FID
+ *
+ * \retval 0 for getting the real parent FID successfully
+ * \retval negative error number on failure
+ */
+static int osd_get_pfid_from_linkea(const struct lu_env *env,
+ struct osd_object *obj,
+ struct lu_fid *fid)
+{
+ struct osd_thread_info *oti = osd_oti_get(env);
+ struct lu_buf *buf = &oti->oti_big_buf;
+ struct dentry *dentry = &oti->oti_obj_dentry;
+ struct inode *inode = obj->oo_inode;
+ struct linkea_data ldata = { 0 };
+ int rc;
+ ENTRY;
+
+ fid_zero(fid);
+ if (!S_ISDIR(inode->i_mode))
+ RETURN(-EIO);
+
+again:
+ rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
+ buf->lb_buf, buf->lb_len);
+ if (rc == -ERANGE) {
+ rc = __osd_xattr_get(inode, dentry, XATTR_NAME_LINK,
+ NULL, 0);
+ if (rc > 0) {
+ lu_buf_realloc(buf, rc);
+ if (buf->lb_buf == NULL)
+ RETURN(-ENOMEM);
+
+ goto again;
+ }
+ }
+
+ if (unlikely(rc == 0))
+ RETURN(-ENODATA);
+
+ if (rc < 0)
+ RETURN(rc);
+
+ if (unlikely(buf->lb_buf == NULL)) {
+ lu_buf_realloc(buf, rc);
+ if (buf->lb_buf == NULL)
+ RETURN(-ENOMEM);
+
+ goto again;
+ }
+
+ ldata.ld_buf = buf;
+ rc = linkea_init(&ldata);
+ if (rc == 0) {
+ linkea_first_entry(&ldata);
+ linkea_entry_unpack(ldata.ld_lee, &ldata.ld_reclen, NULL, fid);
+ }
+
+ RETURN(rc);
+}
+
+/**
* Calls ->lookup() to find dentry. From dentry get inode and
* read inode's ea to get fid. This is required for interoperability
* mode (b11826)
/* done with de, release bh */
brelse(bh);
- if (rc != 0)
- rc = osd_ea_fid_get(env, obj, ino, fid, id);
- else
+ if (rc != 0) {
+ if (unlikely(ino == osd_remote_parent_ino(dev)))
+ /* If the parent is on remote MDT, and there
+ * is no FID-in-dirent, then we have to get
+ * the parent FID from the linkEA. */
+ rc = osd_get_pfid_from_linkea(env, obj, fid);
+ else
+ rc = osd_ea_fid_get(env, obj, ino, fid, id);
+ } else {
osd_id_gen(id, ino, OSD_OII_NOGEN);
+ }
+
if (rc != 0) {
fid_zero(&oic->oic_fid);
GOTO(out, rc);
GOTO(out_journal, rc);
}
- /* skip the REMOTE_PARENT_DIR. */
- if (inode == dev->od_mdt_map->omm_remote_parent->d_inode)
- GOTO(out_inode, rc = 0);
-
rc = osd_get_lma(info, inode, &info->oti_obj_dentry, lma);
if (rc == 0) {
LASSERT(!(lma->lma_compat & LMAC_NOT_IN_OI));
int rc = 0;
ENTRY;
+ LASSERT(obj->oo_inode != dev->od_mdt_map->omm_remote_parent->d_inode);
+
if (attr & LUDA_VERIFY) {
- attr |= LUDA_TYPE;
- if (unlikely(ino == osd_sb(dev)->s_root->d_inode->i_ino)) {
+ if (unlikely(ino == osd_remote_parent_ino(dev))) {
attr |= LUDA_IGNORE;
- rc = 0;
+ /* If the parent is on remote MDT, and there
+ * is no FID-in-dirent, then we have to get
+ * the parent FID from the linkEA. */
+ osd_get_pfid_from_linkea(env, obj, fid);
} else {
rc = osd_dirent_check_repair(env, obj, it, fid, id,
&attr);
it->oie_dirent->oied_name[1] != '.'))
RETURN(-ENOENT);
- rc = osd_ea_fid_get(env, obj, ino, fid, id);
+ if (unlikely(ino == osd_remote_parent_ino(dev)))
+ /* If the parent is on remote MDT, and there
+ * is no FID-in-dirent, then we have to get
+ * the parent FID from the linkEA. */
+ rc = osd_get_pfid_from_linkea(env, obj, fid);
+ else
+ rc = osd_ea_fid_get(env, obj, ino, fid, id);
} else {
osd_id_gen(id, ino, OSD_OII_NOGEN);
}
OBD_FREE(info->oti_it_ea_buf, OSD_IT_EA_BUFSIZE);
lu_buf_free(&info->oti_iobuf.dr_pg_buf);
lu_buf_free(&info->oti_iobuf.dr_bl_buf);
+ lu_buf_free(&info->oti_big_buf);
OBD_FREE_PTR(info);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff