-/*
+/* -*- 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>
*
// XXX - add transaction sequence numbers
#define EXPORT_SYMTAB
+#define DEBUG_SUBSYSTEM S_MDS
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/stat.h>
-#include <linux/locks.h>
-#include <linux/ext2_fs.h>
-#include <linux/quotaops.h>
-#include <asm/unistd.h>
-#include <asm/uaccess.h>
#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/lustre_dlm.h>
#include <linux/obd_class.h>
-extern struct ptlrpc_request *mds_prep_req(int size, int opcode, int namelen, char *name, int tgtlen, char *tgt);
+extern inline struct mds_obd *mds_req2mds(struct ptlrpc_request *req);
-static int mds_reint_setattr(struct mds_update_record *rec, struct ptlrpc_request *req)
+struct mds_client_info *mds_uuid_to_mci(struct mds_obd *mds, __u8 *uuid)
{
- struct dentry *de;
-
- de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
- if (IS_ERR(de)) {
- req->rq_rephdr->status = -ESTALE;
- return 0;
- }
-
- CDEBUG(D_MDS, "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;
+ struct list_head *p;
+
+ if (!uuid)
+ return NULL;
+
+ list_for_each(p, &mds->mds_client_info) {
+ struct mds_client_info *mci;
+
+ mci = list_entry(p, struct mds_client_info, mci_list);
+ CDEBUG(D_INFO, "checking client UUID '%s'\n",
+ mci->mci_mcd->mcd_uuid);
+ if (!strncmp(mci->mci_mcd->mcd_uuid, uuid,
+ sizeof(mci->mci_mcd->mcd_uuid)))
+ return mci;
+ }
+ CDEBUG(D_INFO, "no mds client info found for UUID '%s'\n", uuid);
+ return NULL;
}
-/*
- 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)
+/* Assumes caller has already pushed us into the kernel context. */
+int mds_update_last_rcvd(struct mds_obd *mds, void *handle,
+ struct ptlrpc_request *req)
{
- memcpy(&inode->u.ext2_i.i_data, id, sizeof(*id));
+ /* get from req->rq_connection-> or req->rq_client */
+ struct mds_client_info *mci;
+ loff_t off;
+ int rc;
+
+ mci = mds_uuid_to_mci(mds, req->rq_connection->c_remote_uuid);
+ if (!mci) {
+ CERROR("unable to locate MDS client data for UUID '%s'\n",
+ ptlrpc_req_to_uuid(req));
+ /* This will be a real error once everything is working */
+ //LBUG();
+ RETURN(0);
+ }
+
+ off = MDS_LR_CLIENT + mci->mci_off * MDS_LR_SIZE;
+
+ ++mds->mds_last_rcvd; /* lock this, or make it an LDLM function? */
+ req->rq_repmsg->transno = HTON__u64(mds->mds_last_rcvd);
+ mci->mci_mcd->mcd_last_rcvd = cpu_to_le64(mds->mds_last_rcvd);
+ mci->mci_mcd->mcd_mount_count = cpu_to_le64(mds->mds_mount_count);
+ mci->mci_mcd->mcd_last_xid = cpu_to_le64(req->rq_xid);
+
+ mds_fs_set_last_rcvd(mds, handle);
+ rc = lustre_fwrite(mds->mds_rcvd_filp, (char *)mci->mci_mcd,
+ sizeof(*mci->mci_mcd), &off);
+ CDEBUG(D_INODE, "wrote trans #%Ld for client '%s' at #%d: rc = %d\n",
+ mds->mds_last_rcvd, mci->mci_mcd->mcd_uuid, mci->mci_off, rc);
+ // store new value and last committed value in req struct
+
+ if (rc == sizeof(*mci->mci_mcd))
+ rc = 0;
+ else {
+ CERROR("error writing to last_rcvd file: rc = %d\n", rc);
+ if (rc >= 0)
+ rc = -EIO;
+ }
+
+ return rc;
}
-
-static int mds_reint_create(struct mds_update_record *rec,
- struct ptlrpc_request *req)
+/* In the write-back case, the client holds a lock on a subtree.
+ * In the intent case, the client holds a lock on the child inode.
+ * In the pathname case, the client (may) hold a lock on the child inode. */
+static int mds_reint_setattr(struct mds_update_record *rec, int offset,
+ struct ptlrpc_request *req)
{
- int type = rec->ur_mode & S_IFMT;
- struct dentry *de;
- struct mds_rep *rep = req->rq_rep.mds;
- struct dentry *dchild;
- int rc;
- ENTRY;
-
- de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
- if (IS_ERR(de)) {
- req->rq_rephdr->status = -ESTALE;
- EXIT;
- return 0;
- }
- CDEBUG(D_MDS, "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 exists (dir %ld, name %s\n",
- de->d_inode->i_ino, rec->ur_name);
- dput(de);
- req->rq_rephdr->status = -ESTALE;
- EXIT;
- return 0;
- }
-
- 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;
+ struct mds_obd *mds = mds_req2mds(req);
+ struct dentry *de;
+ void *handle;
+ struct lustre_handle child_lockh;
+ int rc = 0, err;
+
+ if (req->rq_reqmsg->bufcount > offset + 1) {
+ struct dentry *dir;
+ struct lustre_handle dir_lockh;
+ char *name;
+ int namelen;
+
+ /* a name was supplied by the client; fid1 is the directory */
+ dir = mds_fid2locked_dentry(mds, rec->ur_fid1, NULL, LCK_PR,
+ &dir_lockh);
+ if (!dir || IS_ERR(dir)) {
+ l_dput(dir);
+ LBUG();
+ GOTO(out_setattr, rc = -ESTALE);
+ }
+
+ name = lustre_msg_buf(req->rq_reqmsg, offset + 1);
+ namelen = req->rq_reqmsg->buflens[offset + 1] - 1;
+ de = mds_name2locked_dentry(mds, dir, NULL, name, namelen,
+ 0, &child_lockh, LCK_PR);
+ l_dput(dir);
+ if (!de || IS_ERR(de)) {
+ LBUG();
+ GOTO(out_setattr_de, rc = -ESTALE);
+ }
+ } else {
+ de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
+ if (!de || IS_ERR(de)) {
+ LBUG();
+ GOTO(out_setattr_de, rc = -ESTALE);
+ }
+ }
+ CDEBUG(D_INODE, "ino %ld\n", de->d_inode->i_ino);
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_SETATTR_WRITE,
+ de->d_inode->i_sb->s_dev);
+
+ lock_kernel();
+ handle = mds_fs_start(mds, de->d_inode, MDS_FSOP_SETATTR);
+ if (!handle)
+ GOTO(out_unlock, rc = PTR_ERR(handle));
+ rc = mds_fs_setattr(mds, de, handle, &rec->ur_iattr);
+
+ if (!rc)
+ rc = mds_update_last_rcvd(mds, handle, req);
+
+ err = mds_fs_commit(mds, de->d_inode, handle);
+ if (err) {
+ CERROR("error on commit: err = %d\n", err);
+ if (!rc)
+ rc = err;
+ }
+
+ EXIT;
+ out_unlock:
+ unlock_kernel();
+ out_setattr_de:
+ l_dput(de);
+ out_setattr:
+ req->rq_status = rc;
+ return(0);
}
-static int mds_reint_unlink(struct mds_update_record *rec,
- struct ptlrpc_request *req)
+static int mds_reint_recreate(struct mds_update_record *rec, int offset,
+ struct ptlrpc_request *req)
{
- struct dentry *de;
- struct dentry *dchild;
- int rc;
- ENTRY;
-
- de = mds_fid2dentry(req->rq_obd, rec->ur_fid1, NULL);
- if (IS_ERR(de)) {
- req->rq_rephdr->status = -ESTALE;
- EXIT;
- return 0;
- }
- CDEBUG(D_MDS, "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;
+ struct dentry *de = NULL;
+ struct mds_obd *mds = mds_req2mds(req);
+ struct dentry *dchild = NULL;
+ struct inode *dir;
+ int rc = 0;
+ ENTRY;
+
+ de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
+ if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) {
+ LBUG();
+ GOTO(out_create_de, rc = -ESTALE);
+ }
+ dir = de->d_inode;
+ CDEBUG(D_INODE, "parent ino %ld\n", dir->i_ino);
+
+ down(&dir->i_sem);
+ 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));
+ up(&dir->i_sem);
+ LBUG();
+ GOTO(out_create_dchild, rc = -ESTALE);
+ }
+
+ if (dchild->d_inode) {
+ struct mds_body *body;
+ rc = 0;
+ body = lustre_msg_buf(req->rq_repmsg, 0);
+ body->ino = dchild->d_inode->i_ino;
+ body->generation = dchild->d_inode->i_generation;
+ } else {
+ CERROR("child doesn't exist (dir %ld, name %s)\n",
+ dir->i_ino, rec->ur_name);
+ rc = -ENOENT;
+ LBUG();
+ }
+
+out_create_dchild:
+ l_dput(dchild);
+ up(&dir->i_sem);
+out_create_de:
+ l_dput(de);
+ req->rq_status = rc;
+ return 0;
}
-static int mds_reint_link(struct mds_update_record *rec,
- struct ptlrpc_request *req)
+static int mds_reint_create(struct mds_update_record *rec, int offset,
+ struct ptlrpc_request *req)
{
- 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, NULL);
- if (IS_ERR(de_src)) {
- EXIT;
- goto out_link;
- }
-
- de_tgt_dir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, NULL);
- 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;
+ struct dentry *de = NULL;
+ struct mds_obd *mds = mds_req2mds(req);
+ struct dentry *dchild = NULL;
+ struct inode *dir;
+ void *handle;
+ struct lustre_handle lockh;
+ int rc = 0, err, flags, lock_mode, type = rec->ur_mode & S_IFMT;
+ __u64 res_id[3] = {0,0,0};
+ ENTRY;
+
+ /* requests were at offset 2, replies go back at 1 */
+ if (offset)
+ offset = 1;
+
+ if (strcmp(req->rq_export->exp_obd->obd_type->typ_name, "mds") != 0)
+ LBUG();
+
+ de = mds_fid2dentry(mds, rec->ur_fid1, NULL);
+ if (IS_ERR(de) || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_CREATE)) {
+ LBUG();
+ GOTO(out_create_de, rc = -ESTALE);
+ }
+ dir = de->d_inode;
+ CDEBUG(D_INODE, "parent ino %ld name %s mode %o\n",
+ dir->i_ino, rec->ur_name, rec->ur_mode);
+
+ lock_mode = (req->rq_reqmsg->opc == MDS_REINT) ? LCK_CW : LCK_PW;
+ res_id[0] = dir->i_ino;
+
+ rc = ldlm_lock_match(mds->mds_local_namespace, res_id, LDLM_PLAIN,
+ NULL, 0, lock_mode, &lockh);
+ if (rc == 0) {
+ LDLM_DEBUG_NOLOCK("enqueue res %Lu", res_id[0]);
+ rc = ldlm_cli_enqueue(mds->mds_ldlm_client, mds->mds_ldlm_conn,
+ (struct lustre_handle *)&mds->mds_connh,
+ NULL, mds->mds_local_namespace, NULL,
+ res_id, LDLM_PLAIN, NULL, 0, lock_mode,
+ &flags, (void *)mds_lock_callback, NULL,
+ 0, &lockh);
+ if (rc != ELDLM_OK) {
+ CERROR("lock enqueue: err: %d\n", rc);
+ GOTO(out_create_de, rc = -EIO);
+ }
+ }
+ ldlm_lock_dump((void *)(unsigned long)lockh.addr);
+
+ down(&dir->i_sem);
+ 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));
+ up(&dir->i_sem);
+ LBUG();
+ GOTO(out_create_dchild, rc = -ESTALE);
+ }
+
+ if (dchild->d_inode) {
+ struct mds_body *body;
+ struct inode *inode = dchild->d_inode;
+ struct lov_stripe_md *md;
+ CDEBUG(D_INODE, "child exists (dir %ld, name %s, ino %ld)\n",
+ dir->i_ino, rec->ur_name, dchild->d_inode->i_ino);
+
+ body = lustre_msg_buf(req->rq_repmsg, offset);
+ mds_pack_inode2fid(&body->fid1, inode);
+ mds_pack_inode2body(body, inode);
+#warning FIXME: This ext3/N-specific code does not belong here
+ /* If i_file_acl is set, this inode has an EA */
+ if (S_ISREG(inode->i_mode) && inode->u.ext3_i.i_file_acl) {
+ md = lustre_msg_buf(req->rq_repmsg, offset + 1);
+ md->lmd_size = mds->mds_max_mdsize;
+ mds_fs_get_md(mds, inode, md);
+ }
+ /* now a normal case for intent locking */
+ GOTO(out_create_dchild, rc = -EEXIST);
+ }
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_CREATE_WRITE, dir->i_sb->s_dev);
+
+ if (dir->i_mode & S_ISGID) {
+ rec->ur_gid = dir->i_gid;
+ if (S_ISDIR(rec->ur_mode))
+ rec->ur_mode |= S_ISGID;
+ }
+
+ switch (type) {
+ case S_IFREG: {
+ handle = mds_fs_start(mds, dir, MDS_FSOP_CREATE);
+ if (!handle)
+ GOTO(out_create_dchild, PTR_ERR(handle));
+ rc = vfs_create(dir, dchild, rec->ur_mode);
+ EXIT;
+ break;
+ }
+ case S_IFDIR: {
+ handle = mds_fs_start(mds, dir, MDS_FSOP_MKDIR);
+ if (!handle)
+ GOTO(out_create_dchild, PTR_ERR(handle));
+ rc = vfs_mkdir(dir, dchild, rec->ur_mode);
+ EXIT;
+ break;
+ }
+ case S_IFLNK: {
+ handle = mds_fs_start(mds, dir, MDS_FSOP_SYMLINK);
+ if (!handle)
+ GOTO(out_create_dchild, PTR_ERR(handle));
+ rc = vfs_symlink(dir, dchild, rec->ur_tgt);
+ EXIT;
+ break;
+ }
+ case S_IFCHR:
+ case S_IFBLK:
+ case S_IFIFO:
+ case S_IFSOCK: {
+ int rdev = rec->ur_rdev;
+ handle = mds_fs_start(mds, dir, MDS_FSOP_MKNOD);
+ if (!handle)
+ GOTO(out_create_dchild, PTR_ERR(handle));
+ rc = vfs_mknod(dir, dchild, rec->ur_mode, rdev);
+ EXIT;
+ break;
+ }
+ default:
+ CERROR("bad file type %o for create of %s\n",type,rec->ur_name);
+ GOTO(out_create_dchild, rc = -EINVAL);
+ }
+
+ if (rc) {
+ CERROR("error during create: %d\n", rc);
+ if (rc != -ENOSPC)
+ LBUG();
+ GOTO(out_create_commit, rc);
+ } else {
+ struct iattr iattr;
+ struct inode *inode = dchild->d_inode;
+ struct mds_body *body;
+
+ CDEBUG(D_INODE, "created ino %ld\n", dchild->d_inode->i_ino);
+ if (!offset && type == S_IFREG) {
+ struct lov_stripe_md *md;
+ md = lustre_msg_buf(req->rq_reqmsg, 2);
+ rc = mds_fs_set_md(mds, inode, handle, md);
+ if (rc) {
+ CERROR("error %d setting obdo for %ld\n",
+ rc, inode->i_ino);
+ GOTO(out_create_unlink, rc);
+ }
+ }
+
+ iattr.ia_atime = rec->ur_time;
+ iattr.ia_ctime = rec->ur_time;
+ iattr.ia_mtime = rec->ur_time;
+ iattr.ia_uid = rec->ur_uid;
+ iattr.ia_gid = rec->ur_gid;
+ iattr.ia_valid = ATTR_UID | ATTR_GID | ATTR_ATIME |
+ ATTR_MTIME | ATTR_CTIME;
+
+ rc = mds_fs_setattr(mds, dchild, handle, &iattr);
+ if (rc) {
+ CERROR("error on setattr: rc = %d\n", rc);
+ /* XXX should we abort here in case of error? */
+ }
+
+ rc = mds_update_last_rcvd(mds, handle, req);
+ if (rc) {
+ CERROR("error on update_last_rcvd: rc = %d\n", rc);
+ /* XXX should we abort here in case of error? */
+ }
+
+ body = lustre_msg_buf(req->rq_repmsg, offset);
+ body->ino = inode->i_ino;
+ body->generation = inode->i_generation;
+ }
+ EXIT;
+out_create_commit:
+ err = mds_fs_commit(mds, dir, handle);
+ if (err) {
+ CERROR("error on commit: err = %d\n", err);
+ if (!rc)
+ rc = err;
+ }
+out_create_dchild:
+ l_dput(dchild);
+ up(&dir->i_sem);
+ ldlm_lock_decref(&lockh, lock_mode);
+out_create_de:
+ l_dput(de);
+ req->rq_status = rc;
+ return 0;
+
+out_create_unlink:
+ /* Destroy the file we just created. This should not need extra
+ * journal credits, as we have already modified all of the blocks
+ * needed in order to create the file in the first place.
+ */
+ switch(type) {
+ case S_IFDIR:
+ err = vfs_rmdir(dir, dchild);
+ if (err)
+ CERROR("failed rmdir in error path: rc = %d\n", err);
+ break;
+ default:
+ err = vfs_unlink(dir, dchild);
+ if (err)
+ CERROR("failed unlink in error path: rc = %d\n", err);
+ }
+
+ goto out_create_commit;
}
+static int mds_reint_unlink(struct mds_update_record *rec, int offset,
+ struct ptlrpc_request *req)
+{
+ struct dentry *de = NULL;
+ struct dentry *dchild = NULL;
+ struct mds_obd *mds = mds_req2mds(req);
+ char *name;
+ int namelen;
+ struct inode *dir, *inode;
+ int lock_mode;
+ struct lustre_handle lockh, child_lockh;
+ void *handle;
+ int rc = 0;
+ int err;
+ ENTRY;
+
+ /* a name was supplied by the client; fid1 is the directory */
+ lock_mode = (req->rq_reqmsg->opc == MDS_REINT) ? LCK_CW : LCK_PW;
+ de = mds_fid2locked_dentry(mds, rec->ur_fid1, NULL, lock_mode,
+ &lockh);
+ if (!de || IS_ERR(de)) {
+ LBUG();
+ RETURN(-ESTALE);
+ }
+
+ name = lustre_msg_buf(req->rq_reqmsg, offset + 1);
+ namelen = req->rq_reqmsg->buflens[offset + 1] - 1;
+ dchild = mds_name2locked_dentry(mds, de, NULL, name, namelen,
+ LCK_EX, &child_lockh, lock_mode);
+
+ if (!dchild || IS_ERR(dchild)
+ || OBD_FAIL_CHECK(OBD_FAIL_MDS_REINT_UNLINK)) {
+ LBUG();
+ GOTO(out_unlink, rc = -ESTALE);
+ }
+
+ dir = de->d_inode;
+ inode = dchild->d_inode;
+ CDEBUG(D_INODE, "parent ino %ld\n", dir->i_ino);
+
+ if (!inode) {
+ CDEBUG(D_INODE, "child doesn't exist (dir %ld, name %s\n",
+ dir->i_ino, rec->ur_name);
+ GOTO(out_unlink_dchild, rc = -ENOENT);
+ } else if (offset) {
+ struct mds_body *body = lustre_msg_buf(req->rq_repmsg, 1);
+ mds_pack_inode2fid(&body->fid1, inode);
+ mds_pack_inode2body(body, inode);
+ }
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_UNLINK_WRITE, dir->i_sb->s_dev);
+
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFDIR:
+ handle = mds_fs_start(mds, dir, MDS_FSOP_RMDIR);
+ if (!handle)
+ GOTO(out_unlink_cancel, rc = PTR_ERR(handle));
+ rc = vfs_rmdir(dir, dchild);
+ break;
+ case S_IFREG:
+ if (inode->u.ext3_i.i_file_acl && offset) {
+ struct lov_stripe_md *md;
+ md = lustre_msg_buf(req->rq_repmsg, 2);
+ rc = mds_fs_get_md(mds, inode, md);
+ if (rc < 0) {
+ CDEBUG(D_INFO, "No md for ino %ld err %d\n",
+ inode->i_ino, rc);
+ memset(md, 0, md->lmd_size);
+ }
+ }
+ default:
+ handle = mds_fs_start(mds, dir, MDS_FSOP_UNLINK);
+ if (!handle)
+ GOTO(out_unlink_cancel, rc = PTR_ERR(handle));
+ rc = vfs_unlink(dir, dchild);
+ break;
+ }
+
+ if (!rc)
+ rc = mds_update_last_rcvd(mds, handle, req);
+ err = mds_fs_commit(mds, dir, handle);
+ if (err) {
+ CERROR("error on commit: err = %d\n", err);
+ if (!rc)
+ rc = err;
+ }
+
+ EXIT;
+
+ out_unlink_cancel:
+ ldlm_lock_decref(&child_lockh, LCK_EX);
+ rc = ldlm_cli_cancel(&child_lockh);
+ if (rc < 0)
+ CERROR("failed to cancel child inode lock ino\n");
+out_unlink_dchild:
+ l_dput(dchild);
+out_unlink:
+ up(&dir->i_sem);
+ ldlm_lock_decref(&lockh, lock_mode);
+ l_dput(de);
+ req->rq_status = rc;
+ return 0;
+}
-static int mds_reint_rename(struct mds_update_record *rec,
- struct ptlrpc_request *req)
+static int mds_reint_link(struct mds_update_record *rec, int offset,
+ struct ptlrpc_request *req)
{
- 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, NULL);
- if (IS_ERR(de_srcdir)) {
- EXIT;
- goto out_rename;
- }
-
- de_tgtdir = mds_fid2dentry(req->rq_obd, rec->ur_fid2, NULL);
- 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);
+ struct dentry *de_src = NULL;
+ struct dentry *de_tgt_dir = NULL;
+ struct dentry *dchild = NULL;
+ struct mds_obd *mds = mds_req2mds(req);
+ void *handle;
+ int rc = 0;
+ int err;
+
+ ENTRY;
+ de_src = mds_fid2dentry(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(mds, rec->ur_fid2, NULL);
+ if (IS_ERR(de_tgt_dir)) {
+ GOTO(out_link_de_src, rc = -ESTALE);
+ }
+
+ down(&de_tgt_dir->d_inode->i_sem);
+ 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_de_tgt_dir, 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_dchild, rc = -EEXIST);
+ }
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_LINK_WRITE,
+ de_src->d_inode->i_sb->s_dev);
+
+ handle = mds_fs_start(mds, de_tgt_dir->d_inode, MDS_FSOP_LINK);
+ if (!handle)
+ GOTO(out_link_dchild, rc = PTR_ERR(handle));
+
+ rc = vfs_link(de_src, de_tgt_dir->d_inode, dchild);
+
+ if (!rc)
+ rc = mds_update_last_rcvd(mds, handle, req);
+
+ err = mds_fs_commit(mds, de_tgt_dir->d_inode, handle);
+ if (err) {
+ CERROR("error on commit: err = %d\n", err);
+ if (!rc)
+ rc = err;
+ }
+ EXIT;
+
+out_link_dchild:
+ l_dput(dchild);
+out_link_de_tgt_dir:
+ up(&de_tgt_dir->d_inode->i_sem);
+ l_dput(de_tgt_dir);
+out_link_de_src:
+ l_dput(de_src);
+out_link:
+ req->rq_status = rc;
+ return 0;
+}
+static int mds_reint_rename(struct mds_update_record *rec, int offset,
+ struct ptlrpc_request *req)
+{
+ struct dentry *de_srcdir = NULL;
+ struct dentry *de_tgtdir = NULL;
+ struct dentry *de_old = NULL;
+ struct dentry *de_new = NULL;
+ struct mds_obd *mds = mds_req2mds(req);
+ struct lustre_handle tgtlockh, srclockh, oldhandle;
+ int flags, lock_mode, rc = 0, err;
+ void *handle;
+ __u64 res_id[3] = {0};
+ ENTRY;
+
+ de_srcdir = mds_fid2dentry(mds, rec->ur_fid1, NULL);
+ if (IS_ERR(de_srcdir))
+ GOTO(out_rename, rc = -ESTALE);
+
+ lock_mode = (req->rq_reqmsg->opc == MDS_REINT) ? LCK_CW : LCK_PW;
+ res_id[0] = de_srcdir->d_inode->i_ino;
+
+ rc = ldlm_lock_match(mds->mds_local_namespace, res_id, LDLM_PLAIN,
+ NULL, 0, lock_mode, &srclockh);
+ if (rc == 0) {
+ LDLM_DEBUG_NOLOCK("enqueue res %Lu", res_id[0]);
+ rc = ldlm_cli_enqueue(mds->mds_ldlm_client, mds->mds_ldlm_conn,
+ (struct lustre_handle *)&mds->mds_connh,
+ NULL, mds->mds_local_namespace, NULL,
+ res_id, LDLM_PLAIN, NULL, 0, lock_mode,
+ &flags, (void *)mds_lock_callback, NULL,
+ 0, &srclockh);
+ if (rc != ELDLM_OK) {
+ CERROR("lock enqueue: err: %d\n", rc);
+ GOTO(out_rename_srcput, rc = -EIO);
+ }
+ } else
+ ldlm_lock_dump((void *)(unsigned long)srclockh.addr);
+
+ de_tgtdir = mds_fid2dentry(mds, rec->ur_fid2, NULL);
+ if (IS_ERR(de_tgtdir))
+ GOTO(out_rename_srcdir, rc = -ESTALE);
+
+ lock_mode = (req->rq_reqmsg->opc == MDS_REINT) ? LCK_CW : LCK_PW;
+ res_id[0] = de_tgtdir->d_inode->i_ino;
+
+ rc = ldlm_lock_match(mds->mds_local_namespace, res_id, LDLM_PLAIN,
+ NULL, 0, lock_mode, &tgtlockh);
+ if (rc == 0) {
+ LDLM_DEBUG_NOLOCK("enqueue res %Lu", res_id[0]);
+ rc = ldlm_cli_enqueue(mds->mds_ldlm_client, mds->mds_ldlm_conn,
+ (struct lustre_handle *)&mds->mds_connh,
+ NULL, mds->mds_local_namespace, NULL,
+ res_id, LDLM_PLAIN, NULL, 0, lock_mode,
+ &flags, (void *)mds_lock_callback, NULL,
+ 0, &tgtlockh);
+ if (rc != ELDLM_OK) {
+ CERROR("lock enqueue: err: %d\n", rc);
+ GOTO(out_rename_tgtput, rc = -EIO);
+ }
+ } else
+ ldlm_lock_dump((void *)(unsigned long)tgtlockh.addr);
+
+ double_lock(de_tgtdir, de_srcdir);
+
+ de_old = lookup_one_len(rec->ur_name, de_srcdir, rec->ur_namelen - 1);
+ if (IS_ERR(de_old)) {
+ CERROR("old child lookup error (%*s): %ld\n",
+ rec->ur_namelen - 1, rec->ur_name, PTR_ERR(de_old));
+ GOTO(out_rename_tgtdir, rc = -ENOENT);
+ }
+
+ de_new = lookup_one_len(rec->ur_tgt, de_tgtdir, rec->ur_tgtlen - 1);
+ if (IS_ERR(de_new)) {
+ CERROR("new child lookup error (%*s): %ld\n",
+ rec->ur_tgtlen - 1, rec->ur_tgt, PTR_ERR(de_new));
+ GOTO(out_rename_deold, rc = -ENOENT);
+ }
+
+ OBD_FAIL_WRITE(OBD_FAIL_MDS_REINT_RENAME_WRITE,
+ de_srcdir->d_inode->i_sb->s_dev);
+
+ handle = mds_fs_start(mds, de_tgtdir->d_inode, MDS_FSOP_RENAME);
+ if (!handle)
+ GOTO(out_rename_denew, rc = PTR_ERR(handle));
+ lock_kernel();
+ rc = vfs_rename(de_srcdir->d_inode, de_old, de_tgtdir->d_inode, de_new,
+ NULL);
+ unlock_kernel();
+
+ if (!rc)
+ rc = mds_update_last_rcvd(mds, handle, req);
+
+ err = mds_fs_commit(mds, de_tgtdir->d_inode, handle);
+ if (err) {
+ CERROR("error on commit: err = %d\n", err);
+ if (!rc)
+ rc = err;
+ }
+ EXIT;
+
+out_rename_denew:
+ l_dput(de_new);
+out_rename_deold:
+ if (!rc) {
+ res_id[0] = de_old->d_inode->i_ino;
+ /* Take an exclusive lock on the resource that we're
+ * about to free, to force everyone to drop their
+ * locks. */
+ LDLM_DEBUG_NOLOCK("getting EX lock res %Lu", res_id[0]);
+ rc = ldlm_cli_enqueue(mds->mds_ldlm_client, mds->mds_ldlm_conn,
+ (struct lustre_handle *)&mds->mds_connh,
+ NULL, mds->mds_local_namespace, NULL,
+ res_id,
+ LDLM_PLAIN, NULL, 0, LCK_EX, &flags,
+ (void *)mds_lock_callback, NULL, 0,
+ &oldhandle);
+ if (rc)
+ CERROR("failed to get child inode lock (child ino %Ld, "
+ "dir ino %ld)\n",
+ res_id[0], de_old->d_inode->i_ino);
+ }
+
+ l_dput(de_old);
+
+ if (!rc) {
+ ldlm_lock_decref(&oldhandle, LCK_EX);
+ rc = ldlm_cli_cancel(&oldhandle);
+ if (rc < 0)
+ CERROR("failed to cancel child inode lock ino "
+ "%Ld: %d\n", res_id[0], rc);
+ }
+ out_rename_tgtdir:
+ double_up(&de_srcdir->d_inode->i_sem, &de_tgtdir->d_inode->i_sem);
+ ldlm_lock_decref(&tgtlockh, lock_mode);
+ out_rename_tgtput:
+ l_dput(de_tgtdir);
+ out_rename_srcdir:
+ ldlm_lock_decref(&srclockh, lock_mode);
+ out_rename_srcput:
+ l_dput(de_srcdir);
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;
+ req->rq_status = rc;
+ return 0;
}
-typedef int (*mds_reinter)(struct mds_update_record *, struct ptlrpc_request*);
+typedef int (*mds_reinter)(struct mds_update_record *, int offset,
+ 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
+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,
+ [REINT_RECREATE] mds_reint_recreate,
};
-int mds_reint_rec(struct mds_update_record *rec, struct ptlrpc_request *req)
+int mds_reint_rec(struct mds_update_record *rec, int offset,
+ 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;
-}
+ struct mds_obd *mds = mds_req2mds(req);
+ struct obd_run_ctxt saved;
+
+ int rc;
+ if (rec->ur_opcode < 1 || rec->ur_opcode > REINT_MAX) {
+ CERROR("opcode %d not valid\n", rec->ur_opcode);
+ rc = req->rq_status = -EINVAL;
+ RETURN(rc);
+ }
+
+ push_ctxt(&saved, &mds->mds_ctxt);
+ rc = reinters[rec->ur_opcode](rec, offset, req);
+ pop_ctxt(&saved);
+
+ return rc;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff