-/*
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
* linux/mds/mds_reint.c
- *
+ *
* Lustre Metadata Server (mds) reintegration routines
- *
+ *
* Copyright (C) 2002 Cluster File Systems, Inc.
* author: Peter Braam <braam@clusterfs.com>
*
#include <linux/quotaops.h>
#include <asm/unistd.h>
#include <asm/uaccess.h>
+
+#define DEBUG_SUBSYSTEM S_MDS
+
#include <linux/obd_support.h>
+#include <linux/obd_class.h>
#include <linux/obd.h>
#include <linux/lustre_lib.h>
#include <linux/lustre_idl.h>
#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 mds_request *req)
+static int mds_reint_setattr(struct mds_update_record *rec, struct ptlrpc_request *req)
{
- struct vfsmount *mnt;
- struct dentry *de;
+ struct dentry *de;
+ struct inode *inode;
- de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
- if (IS_ERR(de)) {
- req->rq_rephdr->status = -ESTALE;
- return 0;
- }
+ de = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+ if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_SETATTR)) {
+ req->rq_rephdr->status = -ESTALE;
+ RETURN(0);
+ }
- printk("mds_setattr: ino %ld\n", de->d_inode->i_ino);
- req->rq_rephdr->status = notify_change(de, &rec->ur_iattr);
+ inode = de->d_inode;
+ CDEBUG(D_INODE, "ino %ld\n", inode->i_ino);
- dput(de);
- EXIT;
- return 0;
+ /* 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;
+ inode->i_size = rec->ur_iattr.ia_size;
+
+ /* an _even_more_ horrible hack to make this hack work with
+ * ext3. This is because ext3 keeps a separate inode size
+ * until the inode is committed to ensure consistency. This
+ * will also go away with the move to EAs.
+ */
+ if (!strcmp(inode->i_sb->s_type->name, "ext3"))
+ inode->u.ext3_i.i_disksize = inode->i_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 = inode->i_mode;
+ }
+ }
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE);
+ if ( inode->i_op->setattr ) {
+ req->rq_rephdr->status =
+ inode->i_op->setattr(de, &rec->ur_iattr);
+ } else {
+ req->rq_rephdr->status =
+ inode_setattr(inode, &rec->ur_iattr);
+ }
+
+ l_dput(de);
+ RETURN(0);
}
-/*
+/*
XXX nasty hack: store the object id in the first two
- direct block spots
+ direct block spots
*/
static inline void mds_store_objid(struct inode *inode, __u64 *id)
{
- memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
+ /* FIXME: it is only by luck that this works on ext3 */
+ memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
+}
+
+
+static int mds_reint_create(struct mds_update_record *rec,
+ struct ptlrpc_request *req)
+{
+ int type = rec->ur_mode & S_IFMT;
+ struct dentry *de = NULL;
+ struct mds_rep *rep = req->rq_rep.mds;
+ struct dentry *dchild = NULL;
+ int rc = 0;
+ ENTRY;
+
+ de = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+ if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) {
+ LBUG();
+ GOTO(out_reint_create, (rc = -ESTALE));
+ }
+ CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
+
+ dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
+ if (IS_ERR(dchild)) {
+ CERROR("child lookup error %ld\n", PTR_ERR(dchild));
+ LBUG();
+ GOTO(out_reint_create, (rc = -ESTALE));
+ }
+
+ if (dchild->d_inode) {
+ CERROR("child exists (dir %ld, name %s)\n",
+ de->d_inode->i_ino, rec->ur_name);
+ LBUG();
+ GOTO(out_reint_create, (rc = -EEXIST));
+ }
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE);
+
+ 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;
+ }
+ }
+
+ 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;
+ rep->generation = dchild->d_inode->i_generation;
+ } else {
+ CERROR("error during create: %d\n", rc);
+ LBUG();
+ }
+
+out_reint_create:
+ req->rq_rephdr->status = rc;
+ l_dput(de);
+ l_dput(dchild);
+ RETURN(0);
+}
+
+static int mds_reint_unlink(struct mds_update_record *rec,
+ struct ptlrpc_request *req)
+{
+ struct dentry *de = NULL;
+ struct dentry *dchild = NULL;
+ int rc = 0;
+ ENTRY;
+
+ de = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+ if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) {
+ LBUG();
+ GOTO(out_unlink, (rc = -ESTALE));
+ }
+ CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
+
+ dchild = lookup_one_len(rec->ur_name, de, rec->ur_namelen - 1);
+ if (IS_ERR(dchild)) {
+ CERROR("child lookup error %ld\n", PTR_ERR(dchild));
+ LBUG();
+ GOTO(out_unlink, (rc = -ESTALE));
+ }
+
+ if (!dchild->d_inode) {
+ CERROR("child doesn't exist (dir %ld, name %s\n",
+ de->d_inode->i_ino, rec->ur_name);
+ LBUG();
+ GOTO(out_unlink, (rc = -ESTALE));
+ }
+
+ if (dchild->d_inode->i_ino != rec->ur_fid2->id)
+ LBUG();
+ if (dchild->d_inode->i_generation != rec->ur_fid2->generation)
+ LBUG();
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE);
+
+ 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;
+ }
+
+out_unlink:
+ req->rq_rephdr->status = rc;
+ l_dput(de);
+ l_dput(dchild);
+ RETURN(0);
+}
+
+static int mds_reint_link(struct mds_update_record *rec,
+ struct ptlrpc_request *req)
+{
+ struct dentry *de_src = NULL;
+ struct dentry *de_tgt_dir = NULL;
+ struct dentry *dchild = NULL;
+ int rc = 0;
+
+ ENTRY;
+ de_src = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+ if (IS_ERR(de_src) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_LINK)) {
+ GOTO(out_link, (rc = -ESTALE));
+ }
+
+ de_tgt_dir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
+ if (IS_ERR(de_tgt_dir)) {
+ GOTO(out_link, (rc = -ESTALE));
+ }
+
+ dchild = lookup_one_len(rec->ur_name, de_tgt_dir, rec->ur_namelen - 1);
+ if (IS_ERR(dchild)) {
+ CERROR("child lookup error %ld\n", PTR_ERR(dchild));
+ GOTO(out_link, (rc = -ESTALE));
+ }
+
+ if (dchild->d_inode) {
+ CERROR("child exists (dir %ld, name %s\n",
+ de_tgt_dir->d_inode->i_ino, rec->ur_name);
+ GOTO(out_link, (rc = -EEXIST));
+ }
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE);
+
+ rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
+ EXIT;
+
+ out_link:
+ req->rq_rephdr->status = rc;
+ l_dput(de_src);
+ l_dput(de_tgt_dir);
+ l_dput(dchild);
+ return 0;
}
-static int mds_reint_create(struct mds_update_record *rec,
- struct mds_request *req)
+static int mds_reint_rename(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 = req->rq_rep;
- struct dentry *dchild;
- int rc;
-
- de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, &mnt);
- if (IS_ERR(de)) {
- req->rq_rephdr->status = -ESTALE;
- 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);
- rc = PTR_ERR(dchild);
- if (IS_ERR(dchild)) {
- printk(__FUNCTION__ "child lookup error %d\n", rc);
- dput(de);
- req->rq_rephdr->status = -ESTALE;
- return 0;
- }
-
- 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;
- return 0;
- }
-
- switch (type) {
- case S_IFREG: {
- rc = vfs_create(de->d_inode, dchild, rec->ur_mode);
-
- if (!rc) {
- 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;
- }
- break;
- }
- case S_IFDIR: {
- rc = vfs_mkdir(de->d_inode, dchild, rec->ur_mode);
- 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);
- break;
- }
- }
- req->rq_rephdr->status = rc;
-
- dput(de);
- dput(dchild);
- EXIT;
- return 0;
+ struct dentry *de_srcdir = NULL;
+ struct dentry *de_tgtdir = NULL;
+ struct dentry *de_old = NULL;
+ struct dentry *de_new = NULL;
+ int rc = 0;
+ ENTRY;
+
+ de_srcdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid1, NULL);
+ if (IS_ERR(de_srcdir)) {
+ GOTO(out_rename, (rc = -ESTALE));
+ }
+
+ de_tgtdir = mds_fid2dentry(&req->rq_obd->u.mds, rec->ur_fid2, NULL);
+ if (IS_ERR(de_tgtdir)) {
+ GOTO(out_rename, (rc = -ESTALE));
+ }
+
+ de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
+ if (IS_ERR(de_old)) {
+ CERROR("child lookup error %ld\n", PTR_ERR(de_old));
+ GOTO(out_rename, (rc = -ESTALE));
+ }
+
+ de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
+ if (IS_ERR(de_new)) {
+ CERROR("child lookup error %ld\n", PTR_ERR(de_new));
+ GOTO(out_rename, (rc = -ESTALE));
+ }
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE);
+
+ rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new);
+ EXIT;
+
+ out_rename:
+ req->rq_rephdr->status = rc;
+ l_dput(de_new);
+ l_dput(de_old);
+ l_dput(de_tgtdir);
+ l_dput(de_srcdir);
+ return 0;
}
-typedef int (*mds_reinter)(struct mds_update_record *, struct mds_request*);
+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
+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 mds_request *req)
+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);
- return -EINVAL;
- }
-
- rc = mds_pack_rep(NULL, 0, NULL, 0, &req->rq_rephdr, &req->rq_rep,
- &req->rq_replen, &req->rq_repbuf);
- if (rc) {
- EXIT;
- printk("mds: out of memory\n");
- req->rq_status = -ENOMEM;
- return -ENOMEM;
- }
- req->rq_rephdr->seqno = req->rq_reqhdr->seqno;
-
- rc = reinters[rec->ur_opcode](rec, req);
- return rc;
-}
+ int rc;
+ if (rec->ur_opcode < 0 || rec->ur_opcode > REINT_MAX) {
+ CERROR("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,
+ &req->rq_replen, &req->rq_repbuf);
+ if (rc) {
+ CERROR("mds: out of memory\n");
+ rc = req->rq_status = -ENOMEM;
+ RETURN(rc);
+ }
+ req->rq_rephdr->xid = req->rq_reqhdr->xid;
+
+ rc = reinters[rec->ur_opcode](rec, req);
+ return rc;
+}