/*
- * linux/mds/handler.c
+ * linux/mds/mds_reint.c
*
- * Lustre Metadata Server (mds) request handler
+ * Lustre Metadata Server (mds) reintegration routines
*
- * Copyright (C) 2001 Cluster File Systems, Inc.
+ * Copyright (C) 2002 Cluster File Systems, Inc.
+ * author: Peter Braam <braam@clusterfs.com>
*
* This code is issued under the GNU General Public License.
* See the file COPYING in this distribution
*
- * by Peter Braam <braam@clusterfs.com>
- *
- * This server is single threaded at present (but can easily be multi threaded).
- *
*/
+// XXX - add transaction sequence numbers
#define EXPORT_SYMTAB
#include <linux/lustre_mds.h>
#include <linux/obd_class.h>
-extern struct mds_request *mds_prep_req(int size, int opcode, int namelen, char *name, int tgtlen, char *tgt);
+extern struct ptlrpc_request *mds_prep_req(int size, int opcode, int namelen, char *name, int tgtlen, char *tgt);
+
+static int mds_reint_setattr(struct mds_update_record *rec, struct ptlrpc_request *req)
+{
+ struct vfsmount *mnt;
+ struct dentry *de;
+ de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
+ if (IS_ERR(de)) {
+ req->rq_rephdr->status = -ESTALE;
+ return 0;
+ }
-int mds_reint_setattr(struct mds_request *req)
+ printk("mds_setattr: ino %ld\n", de->d_inode->i_ino);
+
+ /* a _really_ horrible hack to avoid removing the data stored
+ in the block pointers; this data is the object id
+ this will go into an extended attribute at some point.
+ */
+ if ( rec->ur_iattr.ia_valid & ATTR_SIZE ) {
+ /* ATTR_SIZE would invoke truncate: clear it */
+ rec->ur_iattr.ia_valid &= ~ATTR_SIZE;
+ de->d_inode->i_size = rec->ur_iattr.ia_size;
+ /* make sure _something_ gets set - so new inode
+ goes to disk (probably won't work over XFS */
+ if (!rec->ur_iattr.ia_valid & ATTR_MODE) {
+ rec->ur_iattr.ia_valid |= ATTR_MODE;
+ rec->ur_iattr.ia_mode = de->d_inode->i_mode;
+ }
+ }
+ if ( de->d_inode->i_op->setattr ) {
+ req->rq_rephdr->status =
+ de->d_inode->i_op->setattr(de, &rec->ur_iattr);
+ } else {
+ req->rq_rephdr->status =
+ inode_setattr(de->d_inode, &rec->ur_iattr);
+ }
+
+ l_dput(de);
+ EXIT;
+ return 0;
+}
+
+/*
+ XXX nasty hack: store the object id in the first two
+ direct block spots
+*/
+static inline void mds_store_objid(struct inode *inode, __u64 *id)
+{
+ memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
+}
+
+
+static int mds_reint_create(struct mds_update_record *rec,
+ struct ptlrpc_request *req)
{
struct vfsmount *mnt;
+ int type = rec->ur_mode & S_IFMT;
struct dentry *de;
- struct mds_rep *rep;
- struct mds_rec_setattr *rec;
- struct iattr attr;
+ struct mds_rep *rep = req->rq_rep.mds;
+ struct dentry *dchild;
int rc;
+ ENTRY;
- if (req->rq_req->tgtlen != sizeof(struct mds_rec_setattr) ) {
+ de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
+ if (IS_ERR(de)) {
+ req->rq_rephdr->status = -ESTALE;
EXIT;
- printk("mds: out of memory\n");
- req->rq_status = -EINVAL;
- return -EINVAL;
+ return 0;
}
- rec = mds_req_tgt(req->rq_req);
+ printk("mds_reint_create: ino %ld\n", de->d_inode->i_ino);
- mds_setattr_unpack(rec, &attr);
- de = mds_fid2dentry(req->rq_obd, &rec->sa_fid, &mnt);
+ dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
+ rc = PTR_ERR(dchild);
+ if (IS_ERR(dchild)) {
+ printk(__FUNCTION__ "child lookup error %d\n", rc);
+ dput(de);
+ req->rq_rephdr->status = -ESTALE;
+ EXIT;
+ return 0;
+ }
- printk("mds_setattr: ino %ld\n", de->d_inode->i_ino);
-
- rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
- &req->rq_replen, &req->rq_repbuf);
- if (rc) {
+ if (dchild->d_inode) {
+ printk(__FUNCTION__ "child exists (dir %ld, name %s\n",
+ de->d_inode->i_ino, rec->ur_name);
+ dput(de);
+ req->rq_rephdr->status = -ESTALE;
EXIT;
- printk("mds: out of memory\n");
- req->rq_status = -ENOMEM;
- return -ENOMEM;
+ return 0;
}
- req->rq_rephdr->seqno = req->rq_reqhdr->seqno;
- rep = req->rq_rep;
- req->rq_rephdr->status = notify_change(de, &attr);
+ switch (type) {
+ case S_IFREG: {
+ rc = vfs_create(de->d_inode, dchild, rec->ur_mode);
+
+ EXIT;
+ break;
+ }
+ case S_IFDIR: {
+ rc = vfs_mkdir(de->d_inode, dchild, rec->ur_mode);
+ EXIT;
+ break;
+ }
+ case S_IFLNK: {
+ rc = vfs_symlink(de->d_inode, dchild, rec->ur_tgt);
+ EXIT;
+ break;
+ }
+ case S_IFCHR:
+ case S_IFBLK:
+ case S_IFIFO:
+ case S_IFSOCK: {
+ int rdev = rec->ur_id;
+ rc = vfs_mknod(de->d_inode, dchild, rec->ur_mode, rdev);
+ EXIT;
+ break;
+ }
+ }
+
+ req->rq_rephdr->status = rc;
+ if (!rc) {
+ if (type == S_IFREG)
+ mds_store_objid(dchild->d_inode, &rec->ur_id);
+ dchild->d_inode->i_atime = rec->ur_time;
+ dchild->d_inode->i_ctime = rec->ur_time;
+ dchild->d_inode->i_mtime = rec->ur_time;
+ dchild->d_inode->i_uid = rec->ur_uid;
+ dchild->d_inode->i_gid = rec->ur_gid;
+ rep->ino = dchild->d_inode->i_ino;
+ }
+
+ dput(de);
+ dput(dchild);
+ EXIT;
+ return 0;
+}
+
+static int mds_reint_unlink(struct mds_update_record *rec,
+ struct ptlrpc_request *req)
+{
+ struct vfsmount *mnt;
+ struct dentry *de;
+ struct dentry *dchild;
+ int rc;
+ ENTRY;
+
+ de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
+ if (IS_ERR(de)) {
+ req->rq_rephdr->status = -ESTALE;
+ EXIT;
+ return 0;
+ }
+ printk("mds_reint_create: ino %ld\n", de->d_inode->i_ino);
+
+ dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
+ rc = PTR_ERR(dchild);
+ if (IS_ERR(dchild)) {
+ printk(__FUNCTION__ ": child lookup error %d\n", rc);
+ dput(de);
+ req->rq_rephdr->status = -ESTALE;
+ EXIT;
+ return 0;
+ }
+
+ if (!dchild->d_inode) {
+ printk(__FUNCTION__ ": child doesn't exist (dir %ld, name %s\n",
+ de->d_inode->i_ino, rec->ur_name);
+ dput(de);
+ req->rq_rephdr->status = -ESTALE;
+ EXIT;
+ return 0;
+ }
+
+ switch (dchild->d_inode->i_mode & S_IFMT) {
+ case S_IFDIR:
+ rc = vfs_rmdir(de->d_inode, dchild);
+ EXIT;
+ break;
+ default:
+ rc = vfs_unlink(de->d_inode, dchild);
+
+ EXIT;
+ break;
+ }
+ req->rq_rephdr->status = rc;
dput(de);
+ dput(dchild);
EXIT;
return 0;
}
+static int mds_reint_link(struct mds_update_record *rec,
+ struct ptlrpc_request *req)
+{
+ struct vfsmount *mnt;
+ struct dentry *de_src = NULL;
+ struct dentry *de_tgt_dir = NULL;
+ struct dentry *dchild = NULL;
+ int rc;
+ ENTRY;
+
+ rc = -ESTALE;
+ de_src = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
+ if (IS_ERR(de_src)) {
+ EXIT;
+ goto out_link;
+ }
+
+ de_tgt_dir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, &mnt);
+ if (IS_ERR(de_tgt_dir)) {
+ rc = -ESTALE;
+ EXIT;
+ goto out_link;
+ }
+
+ dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
+ if (IS_ERR(dchild)) {
+ printk(__FUNCTION__ ": child lookup error %d\n", rc);
+ req->rq_rephdr->status = -ESTALE;
+ goto out_link;
+ }
+
+ if (dchild->d_inode) {
+ printk(__FUNCTION__ ": child exists (dir %ld, name %s\n",
+ de_tgt_dir->d_inode->i_ino, rec->ur_name);
+ EXIT;
+ goto out_link;
+ }
+
+ rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
+
+ out_link:
+ req->rq_rephdr->status = rc;
+ l_dput(de_src);
+ l_dput(de_tgt_dir);
+ l_dput(dchild);
+ EXIT;
+ return 0;
+}
+
+
+static int mds_reint_rename(struct mds_update_record *rec,
+ struct ptlrpc_request *req)
+{
+ struct vfsmount *mnt;
+ struct dentry *de_srcdir = NULL;
+ struct dentry *de_tgtdir = NULL;
+ struct dentry *de_old = NULL;
+ struct dentry *de_new = NULL;
+ int rc;
+ ENTRY;
+
+ rc = -ESTALE;
+ de_srcdir = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
+ if (IS_ERR(de_srcdir)) {
+ EXIT;
+ goto out_rename;
+ }
+
+ de_tgtdir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, &mnt);
+ if (IS_ERR(de_tgtdir)) {
+ rc = -ESTALE;
+ EXIT;
+ goto out_rename;
+ }
+
+ de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
+ if (IS_ERR(de_old)) {
+ printk(__FUNCTION__ "child lookup error %d\n", rc);
+ goto out_rename;
+ }
+
+ de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
+ if (IS_ERR(de_new)) {
+ printk(__FUNCTION__ "child lookup error %d\n", rc);
+ goto out_rename;
+ }
+
+ rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
+
+ out_rename:
+ req->rq_rephdr->status = rc;
+ l_dput(de_new);
+ l_dput(de_old);
+ l_dput(de_tgtdir);
+ l_dput(de_srcdir);
+ EXIT;
+ return 0;
+}
+
+typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
+
+static mds_reinter reinters[REINT_MAX+1] = {
+ [REINT_SETATTR] mds_reint_setattr,
+ [REINT_CREATE] mds_reint_create,
+ [REINT_UNLINK] mds_reint_unlink,
+ [REINT_LINK] mds_reint_link,
+ [REINT_RENAME] mds_reint_rename
+};
+
+int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
+{
+ int rc;
+
+ if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
+ printk(__FUNCTION__ "opcode %d not valid\n",
+ rec->ur_opcode);
+ rc = req->rq_status = -EINVAL;
+ return rc;
+ }
+
+ rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep.mds,
+ &req->rq_replen, &req->rq_repbuf);
+ if (rc) {
+ EXIT;
+ printk("mds: out of memory\n");
+ rc = req->rq_status = -ENOMEM;
+ return rc;
+ }
+ req->rq_rephdr->seqno = req->rq_reqhdr->seqno;
+
+ rc = reinters[rec->ur_opcode](rec, req);
+ req->rq_status = rc;
+
+ return rc;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff