if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED))
ll_put_grouplock(inode, file, fd->fd_grouplock.cg_gid);
+ if (fd->fd_lease_och != NULL) {
+ bool lease_broken;
+
+ /* Usually the lease is not released when the
+ * application crashed, we need to release here. */
+ rc = ll_lease_close(fd->fd_lease_och, inode, &lease_broken);
+ CDEBUG(rc ? D_ERROR : D_INODE, "Clean up lease "DFID" %d/%d\n",
+ PFID(&lli->lli_fid), rc, lease_broken);
+
+ fd->fd_lease_och = NULL;
+ }
+
+ if (fd->fd_och != NULL) {
+ rc = ll_close_inode_openhandle(md_exp, inode, fd->fd_och);
+ fd->fd_och = NULL;
+ GOTO(out, rc);
+ }
+
/* Let's see if we have good enough OPEN lock on the file and if
we can skip talking to MDS */
if (file->f_dentry->d_inode) { /* Can this ever be false? */
file, file->f_dentry, file->f_dentry->d_name.name);
}
+out:
LUSTRE_FPRIVATE(file) = NULL;
ll_file_data_put(fd);
ll_capa_close(inode);
body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY);
och->och_fh = body->handle;
och->och_fid = body->fid1;
+ och->och_lease_handle.cookie = it->d.lustre.it_lock_handle;
och->och_magic = OBD_CLIENT_HANDLE_MAGIC;
och->och_flags = it->it_flags;
LUSTRE_FPRIVATE(file) = fd;
ll_readahead_init(inode, &fd->fd_ras);
- fd->fd_omode = it->it_flags;
+ fd->fd_omode = it->it_flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
return 0;
}
return rc;
}
+static int ll_md_blocking_lease_ast(struct ldlm_lock *lock,
+ struct ldlm_lock_desc *desc, void *data, int flag)
+{
+ int rc;
+ struct lustre_handle lockh;
+
+ switch (flag) {
+ case LDLM_CB_BLOCKING:
+ ldlm_lock2handle(lock, &lockh);
+ rc = ldlm_cli_cancel(&lockh, LCF_ASYNC);
+ if (rc < 0) {
+ CDEBUG(D_INODE, "ldlm_cli_cancel: %d\n", rc);
+ return rc;
+ }
+ break;
+ case LDLM_CB_CANCELING:
+ /* do nothing */
+ break;
+ }
+ return 0;
+}
+
+/**
+ * Acquire a lease and open the file.
+ */
+struct obd_client_handle *ll_lease_open(struct inode *inode, struct file *file,
+ fmode_t fmode)
+{
+ struct lookup_intent it = { .it_op = IT_OPEN };
+ struct ll_sb_info *sbi = ll_i2sbi(inode);
+ struct md_op_data *op_data;
+ struct ptlrpc_request *req;
+ struct lustre_handle old_handle = { 0 };
+ struct obd_client_handle *och = NULL;
+ int rc;
+ int rc2;
+
+ if (fmode != FMODE_WRITE && fmode != FMODE_READ)
+ return ERR_PTR(-EINVAL);
+
+ if (file != NULL) {
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct ll_file_data *fd = LUSTRE_FPRIVATE(file);
+ struct obd_client_handle **och_p;
+ __u64 *och_usecount;
+
+ if (!(fmode & file->f_mode) || (file->f_mode & FMODE_EXEC))
+ return ERR_PTR(-EPERM);
+
+ /* Get the openhandle of the file */
+ rc = -EBUSY;
+ mutex_lock(&lli->lli_och_mutex);
+ if (fd->fd_lease_och != NULL) {
+ mutex_unlock(&lli->lli_och_mutex);
+ return ERR_PTR(rc);
+ }
+
+ if (fd->fd_och == NULL) {
+ if (file->f_mode & FMODE_WRITE) {
+ LASSERT(lli->lli_mds_write_och != NULL);
+ och_p = &lli->lli_mds_write_och;
+ och_usecount = &lli->lli_open_fd_write_count;
+ } else {
+ LASSERT(lli->lli_mds_read_och != NULL);
+ och_p = &lli->lli_mds_read_och;
+ och_usecount = &lli->lli_open_fd_read_count;
+ }
+ if (*och_usecount == 1) {
+ fd->fd_och = *och_p;
+ *och_p = NULL;
+ *och_usecount = 0;
+ rc = 0;
+ }
+ }
+ mutex_unlock(&lli->lli_och_mutex);
+ if (rc < 0) /* more than 1 opener */
+ return ERR_PTR(rc);
+
+ LASSERT(fd->fd_och != NULL);
+ old_handle = fd->fd_och->och_fh;
+ }
+
+ OBD_ALLOC_PTR(och);
+ if (och == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, 0, 0,
+ LUSTRE_OPC_ANY, NULL);
+ if (IS_ERR(op_data))
+ GOTO(out, rc = PTR_ERR(op_data));
+
+ /* To tell the MDT this openhandle is from the same owner */
+ op_data->op_handle = old_handle;
+
+ it.it_flags = fmode | MDS_OPEN_LOCK | MDS_OPEN_BY_FID | MDS_OPEN_LEASE;
+ rc = md_intent_lock(sbi->ll_md_exp, op_data, NULL, 0, &it, 0, &req,
+ ll_md_blocking_lease_ast,
+ /* LDLM_FL_NO_LRU: To not put the lease lock into LRU list, otherwise
+ * it can be cancelled which may mislead applications that the lease is
+ * broken;
+ * LDLM_FL_EXCL: Set this flag so that it won't be matched by normal
+ * open in ll_md_blocking_ast(). Otherwise as ll_md_blocking_lease_ast
+ * doesn't deal with openhandle, so normal openhandle will be leaked. */
+ LDLM_FL_NO_LRU | LDLM_FL_EXCL);
+ ll_finish_md_op_data(op_data);
+ if (req != NULL) {
+ ptlrpc_req_finished(req);
+ it_clear_disposition(&it, DISP_ENQ_COMPLETE);
+ }
+ if (rc < 0)
+ GOTO(out_release_it, rc);
+
+ if (it_disposition(&it, DISP_LOOKUP_NEG))
+ GOTO(out_release_it, rc = -ENOENT);
+
+ rc = it_open_error(DISP_OPEN_OPEN, &it);
+ if (rc)
+ GOTO(out_release_it, rc);
+
+ LASSERT(it_disposition(&it, DISP_ENQ_OPEN_REF));
+ ll_och_fill(sbi->ll_md_exp, &it, och);
+
+ if (!it_disposition(&it, DISP_OPEN_LEASE)) /* old server? */
+ GOTO(out_close, rc = -EOPNOTSUPP);
+
+ /* already get lease, handle lease lock */
+ ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL);
+ if (it.d.lustre.it_lock_mode == 0 ||
+ it.d.lustre.it_lock_bits != MDS_INODELOCK_OPEN) {
+ /* open lock must return for lease */
+ CERROR(DFID "lease granted but no open lock, %d/%llu.\n",
+ PFID(ll_inode2fid(inode)), it.d.lustre.it_lock_mode,
+ it.d.lustre.it_lock_bits);
+ GOTO(out_close, rc = -EPROTO);
+ }
+
+ ll_intent_release(&it);
+ return och;
+
+out_close:
+ rc2 = ll_close_inode_openhandle(sbi->ll_md_exp, inode, och);
+ if (rc2)
+ CERROR("Close openhandle returned %d\n", rc2);
+
+ /* cancel open lock */
+ if (it.d.lustre.it_lock_mode != 0) {
+ ldlm_lock_decref_and_cancel(&och->och_lease_handle,
+ it.d.lustre.it_lock_mode);
+ it.d.lustre.it_lock_mode = 0;
+ }
+out_release_it:
+ ll_intent_release(&it);
+out:
+ OBD_FREE_PTR(och);
+ return ERR_PTR(rc);
+}
+EXPORT_SYMBOL(ll_lease_open);
+
+/**
+ * Release lease and close the file.
+ * It will check if the lease has ever broken.
+ */
+int ll_lease_close(struct obd_client_handle *och, struct inode *inode,
+ bool *lease_broken)
+{
+ struct ldlm_lock *lock;
+ bool cancelled = true;
+ int rc;
+
+ lock = ldlm_handle2lock(&och->och_lease_handle);
+ if (lock != NULL) {
+ lock_res_and_lock(lock);
+ cancelled = ldlm_is_cancel(lock);
+ unlock_res_and_lock(lock);
+ ldlm_lock_put(lock);
+ }
+
+ CDEBUG(D_INODE, "lease for "DFID" broken? %d\n",
+ PFID(&ll_i2info(inode)->lli_fid), cancelled);
+
+ if (!cancelled)
+ ldlm_cli_cancel(&och->och_lease_handle, 0);
+ if (lease_broken != NULL)
+ *lease_broken = cancelled;
+
+ rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp, inode, och);
+ return rc;
+}
+EXPORT_SYMBOL(ll_lease_close);
+
/* Fills the obdo with the attributes for the lsm */
static int ll_lsm_getattr(struct lov_stripe_md *lsm, struct obd_export *exp,
struct obd_capa *capa, struct obdo *obdo,
OBD_FREE_PTR(hca);
return rc;
}
+ case LL_IOC_SET_LEASE: {
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct obd_client_handle *och = NULL;
+ bool lease_broken;
+ fmode_t mode = 0;
+
+ switch (arg) {
+ case F_WRLCK:
+ if (!(file->f_mode & FMODE_WRITE))
+ return -EPERM;
+ mode = FMODE_WRITE;
+ break;
+ case F_RDLCK:
+ if (!(file->f_mode & FMODE_READ))
+ return -EPERM;
+ mode = FMODE_READ;
+ break;
+ case F_UNLCK:
+ mutex_lock(&lli->lli_och_mutex);
+ if (fd->fd_lease_och != NULL) {
+ och = fd->fd_lease_och;
+ fd->fd_lease_och = NULL;
+ }
+ mutex_unlock(&lli->lli_och_mutex);
+
+ if (och != NULL) {
+ mode = och->och_flags &
+ (FMODE_READ|FMODE_WRITE);
+ rc = ll_lease_close(och, inode, &lease_broken);
+ if (rc == 0 && lease_broken)
+ mode = 0;
+ } else {
+ rc = -ENOLCK;
+ }
+
+ /* return the type of lease or error */
+ return rc < 0 ? rc : (int)mode;
+ default:
+ return -EINVAL;
+ }
+
+ CDEBUG(D_INODE, "Set lease with mode %d\n", mode);
+
+ /* apply for lease */
+ och = ll_lease_open(inode, file, mode);
+ if (IS_ERR(och))
+ return PTR_ERR(och);
+
+ rc = 0;
+ mutex_lock(&lli->lli_och_mutex);
+ if (fd->fd_lease_och == NULL) {
+ fd->fd_lease_och = och;
+ och = NULL;
+ }
+ mutex_unlock(&lli->lli_och_mutex);
+ if (och != NULL) {
+ /* impossible now that only excl is supported for now */
+ ll_lease_close(och, inode, &lease_broken);
+ rc = -EBUSY;
+ }
+ return rc;
+ }
+ case LL_IOC_GET_LEASE: {
+ struct ll_inode_info *lli = ll_i2info(inode);
+ struct ldlm_lock *lock = NULL;
+
+ rc = 0;
+ mutex_lock(&lli->lli_och_mutex);
+ if (fd->fd_lease_och != NULL) {
+ struct obd_client_handle *och = fd->fd_lease_och;
+
+ lock = ldlm_handle2lock(&och->och_lease_handle);
+ if (lock != NULL) {
+ lock_res_and_lock(lock);
+ if (!ldlm_is_cancel(lock))
+ rc = och->och_flags &
+ (FMODE_READ | FMODE_WRITE);
+ unlock_res_and_lock(lock);
+ ldlm_lock_put(lock);
+ }
+ }
+ mutex_unlock(&lli->lli_och_mutex);
+
+ return rc;
+ }
default: {
int err;
int it_open_error(int phase, struct lookup_intent *it)
{
+ if (it_disposition(it, DISP_OPEN_LEASE)) {
+ if (phase >= DISP_OPEN_LEASE)
+ return it->d.lustre.it_status;
+ else
+ return 0;
+ }
if (it_disposition(it, DISP_OPEN_OPEN)) {
if (phase >= DISP_OPEN_OPEN)
return it->d.lustre.it_status;
/* XXX: openlock is not cancelled for cross-refs. */
/* If inode is known, cancel conflicting OPEN locks. */
if (fid_is_sane(&op_data->op_fid2)) {
- if (it->it_flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
- mode = LCK_CW;
+ if (it->it_flags & MDS_OPEN_LEASE) { /* try to get lease */
+ if (it->it_flags & FMODE_WRITE)
+ mode = LCK_EX;
+ else
+ mode = LCK_PR;
+ } else {
+ if (it->it_flags & (FMODE_WRITE|MDS_OPEN_TRUNC))
+ mode = LCK_CW;
#ifdef FMODE_EXEC
- else if (it->it_flags & FMODE_EXEC)
- mode = LCK_PR;
+ else if (it->it_flags & FMODE_EXEC)
+ mode = LCK_PR;
#endif
- else
- mode = LCK_CR;
+ else
+ mode = LCK_CR;
+ }
count = mdc_resource_get_unused(exp, &op_data->op_fid2,
&cancels, mode,
MDS_INODELOCK_OPEN);
LASSERT(it);
CDEBUG(D_DLMTRACE, "(name: %.*s,"DFID") in obj "DFID
- ", intent: %s flags %#o\n", op_data->op_namelen,
- op_data->op_name, PFID(&op_data->op_fid2),
- PFID(&op_data->op_fid1), ldlm_it2str(it->it_op),
- it->it_flags);
+ ", intent: %s flags %#Lo\n", op_data->op_namelen,
+ op_data->op_name, PFID(&op_data->op_fid2),
+ PFID(&op_data->op_fid1), ldlm_it2str(it->it_op),
+ it->it_flags);
lockh.cookie = 0;
if (fid_is_sane(&op_data->op_fid2) &&
int rc = 0;
__u64 flags = LDLM_FL_HAS_INTENT;
- CDEBUG(D_DLMTRACE,"name: %.*s in inode "DFID", intent: %s flags %#o\n",
- op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
- ldlm_it2str(it->it_op), it->it_flags);
+ CDEBUG(D_DLMTRACE,
+ "name: %.*s in inode "DFID", intent: %s flags %#Lo\n",
+ op_data->op_namelen, op_data->op_name, PFID(&op_data->op_fid1),
+ ldlm_it2str(it->it_op), it->it_flags);
fid_build_reg_res_name(&op_data->op_fid1, &res_id);
req = mdc_intent_getattr_pack(exp, it, op_data);
projects / openwrt / staging / blogic.git / commitdiff