diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/llite/file.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/file.c | 3600 |
1 files changed, 0 insertions, 3600 deletions
diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c deleted file mode 100644 index ca5faea13b7e..000000000000 --- a/drivers/staging/lustre/lustre/llite/file.c +++ /dev/null @@ -1,3600 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * GPL HEADER START - * - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License version 2 for more details (a copy is included - * in the LICENSE file that accompanied this code). - * - * You should have received a copy of the GNU General Public License - * version 2 along with this program; If not, see - * http://www.gnu.org/licenses/gpl-2.0.html - * - * GPL HEADER END - */ -/* - * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. - * Use is subject to license terms. - * - * Copyright (c) 2011, 2015, Intel Corporation. - */ -/* - * This file is part of Lustre, http://www.lustre.org/ - * Lustre is a trademark of Sun Microsystems, Inc. - * - * lustre/llite/file.c - * - * Author: Peter Braam <braam@clusterfs.com> - * Author: Phil Schwan <phil@clusterfs.com> - * Author: Andreas Dilger <adilger@clusterfs.com> - */ - -#define DEBUG_SUBSYSTEM S_LLITE -#include <lustre_dlm.h> -#include <linux/pagemap.h> -#include <linux/file.h> -#include <linux/sched.h> -#include <linux/mount.h> -#include <uapi/linux/lustre/lustre_fiemap.h> -#include <uapi/linux/lustre/lustre_ioctl.h> -#include <lustre_swab.h> - -#include <cl_object.h> -#include "llite_internal.h" - -static int -ll_put_grouplock(struct inode *inode, struct file *file, unsigned long arg); - -static int ll_lease_close(struct obd_client_handle *och, struct inode *inode, - bool *lease_broken); - -static enum llioc_iter -ll_iocontrol_call(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg, int *rcp); - -static struct ll_file_data *ll_file_data_get(void) -{ - struct ll_file_data *fd; - - fd = kmem_cache_zalloc(ll_file_data_slab, GFP_NOFS); - if (!fd) - return NULL; - fd->fd_write_failed = false; - return fd; -} - -static void ll_file_data_put(struct ll_file_data *fd) -{ - if (fd) - kmem_cache_free(ll_file_data_slab, fd); -} - -/** - * Packs all the attributes into @op_data for the CLOSE rpc. - */ -static void ll_prepare_close(struct inode *inode, struct md_op_data *op_data, - struct obd_client_handle *och) -{ - struct ll_inode_info *lli = ll_i2info(inode); - - ll_prep_md_op_data(op_data, inode, NULL, NULL, - 0, 0, LUSTRE_OPC_ANY, NULL); - - op_data->op_attr.ia_mode = inode->i_mode; - op_data->op_attr.ia_atime = inode->i_atime; - op_data->op_attr.ia_mtime = inode->i_mtime; - op_data->op_attr.ia_ctime = inode->i_ctime; - op_data->op_attr.ia_size = i_size_read(inode); - op_data->op_attr.ia_valid |= ATTR_MODE | ATTR_ATIME | ATTR_ATIME_SET | - ATTR_MTIME | ATTR_MTIME_SET | - ATTR_CTIME | ATTR_CTIME_SET; - op_data->op_attr_blocks = inode->i_blocks; - op_data->op_attr_flags = ll_inode_to_ext_flags(inode->i_flags); - op_data->op_handle = och->och_fh; - - /* - * For HSM: if inode data has been modified, pack it so that - * MDT can set data dirty flag in the archive. - */ - if (och->och_flags & FMODE_WRITE && - test_and_clear_bit(LLIF_DATA_MODIFIED, &lli->lli_flags)) - op_data->op_bias |= MDS_DATA_MODIFIED; -} - -/** - * Perform a close, possibly with a bias. - * The meaning of "data" depends on the value of "bias". - * - * If \a bias is MDS_HSM_RELEASE then \a data is a pointer to the data version. - * If \a bias is MDS_CLOSE_LAYOUT_SWAP then \a data is a pointer to the inode to - * swap layouts with. - */ -static int ll_close_inode_openhandle(struct inode *inode, - struct obd_client_handle *och, - enum mds_op_bias bias, - void *data) -{ - const struct ll_inode_info *lli = ll_i2info(inode); - struct obd_export *md_exp = ll_i2mdexp(inode); - struct md_op_data *op_data; - struct ptlrpc_request *req = NULL; - int rc; - - if (!class_exp2obd(md_exp)) { - CERROR("%s: invalid MDC connection handle closing " DFID "\n", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(&lli->lli_fid)); - rc = 0; - goto out; - } - - op_data = kzalloc(sizeof(*op_data), GFP_NOFS); - /* - * We leak openhandle and request here on error, but not much to be - * done in OOM case since app won't retry close on error either. - */ - if (!op_data) { - rc = -ENOMEM; - goto out; - } - - ll_prepare_close(inode, op_data, och); - switch (bias) { - case MDS_CLOSE_LAYOUT_SWAP: - LASSERT(data); - op_data->op_bias |= MDS_CLOSE_LAYOUT_SWAP; - op_data->op_data_version = 0; - op_data->op_lease_handle = och->och_lease_handle; - op_data->op_fid2 = *ll_inode2fid(data); - break; - - case MDS_HSM_RELEASE: - LASSERT(data); - op_data->op_bias |= MDS_HSM_RELEASE; - op_data->op_data_version = *(__u64 *)data; - op_data->op_lease_handle = och->och_lease_handle; - op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS; - break; - - default: - LASSERT(!data); - break; - } - - rc = md_close(md_exp, op_data, och->och_mod, &req); - if (rc && rc != -EINTR) { - CERROR("%s: inode " DFID " mdc close failed: rc = %d\n", - md_exp->exp_obd->obd_name, PFID(&lli->lli_fid), rc); - } - - if (op_data->op_bias & (MDS_HSM_RELEASE | MDS_CLOSE_LAYOUT_SWAP) && - !rc) { - struct mdt_body *body; - - body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); - if (!(body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED)) - rc = -EBUSY; - } - - ll_finish_md_op_data(op_data); - -out: - md_clear_open_replay_data(md_exp, och); - och->och_fh.cookie = DEAD_HANDLE_MAGIC; - kfree(och); - - ptlrpc_req_finished(req); - return rc; -} - -int ll_md_real_close(struct inode *inode, fmode_t fmode) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct obd_client_handle **och_p; - struct obd_client_handle *och; - __u64 *och_usecount; - int rc = 0; - - if (fmode & FMODE_WRITE) { - och_p = &lli->lli_mds_write_och; - och_usecount = &lli->lli_open_fd_write_count; - } else if (fmode & FMODE_EXEC) { - och_p = &lli->lli_mds_exec_och; - och_usecount = &lli->lli_open_fd_exec_count; - } else { - LASSERT(fmode & FMODE_READ); - och_p = &lli->lli_mds_read_och; - och_usecount = &lli->lli_open_fd_read_count; - } - - mutex_lock(&lli->lli_och_mutex); - if (*och_usecount > 0) { - /* There are still users of this handle, so skip - * freeing it. - */ - mutex_unlock(&lli->lli_och_mutex); - return 0; - } - - och = *och_p; - *och_p = NULL; - mutex_unlock(&lli->lli_och_mutex); - - if (och) { - /* There might be a race and this handle may already - * be closed. - */ - rc = ll_close_inode_openhandle(inode, och, 0, NULL); - } - - return rc; -} - -static int ll_md_close(struct inode *inode, struct file *file) -{ - struct ll_file_data *fd = LUSTRE_FPRIVATE(file); - struct ll_inode_info *lli = ll_i2info(inode); - int lockmode; - __u64 flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_TEST_LOCK; - struct lustre_handle lockh; - union ldlm_policy_data policy = { - .l_inodebits = { MDS_INODELOCK_OPEN } - }; - int rc = 0; - - /* clear group lock, if present */ - if (unlikely(fd->fd_flags & LL_FILE_GROUP_LOCKED)) - ll_put_grouplock(inode, file, fd->fd_grouplock.lg_gid); - - if (fd->fd_lease_och) { - 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) { - rc = ll_close_inode_openhandle(inode, fd->fd_och, 0, NULL); - fd->fd_och = NULL; - goto out; - } - - /* Let's see if we have good enough OPEN lock on the file and if - * we can skip talking to MDS - */ - - mutex_lock(&lli->lli_och_mutex); - if (fd->fd_omode & FMODE_WRITE) { - lockmode = LCK_CW; - LASSERT(lli->lli_open_fd_write_count); - lli->lli_open_fd_write_count--; - } else if (fd->fd_omode & FMODE_EXEC) { - lockmode = LCK_PR; - LASSERT(lli->lli_open_fd_exec_count); - lli->lli_open_fd_exec_count--; - } else { - lockmode = LCK_CR; - LASSERT(lli->lli_open_fd_read_count); - lli->lli_open_fd_read_count--; - } - mutex_unlock(&lli->lli_och_mutex); - - if (!md_lock_match(ll_i2mdexp(inode), flags, ll_inode2fid(inode), - LDLM_IBITS, &policy, lockmode, &lockh)) - rc = ll_md_real_close(inode, fd->fd_omode); - -out: - LUSTRE_FPRIVATE(file) = NULL; - ll_file_data_put(fd); - - return rc; -} - -/* While this returns an error code, fput() the caller does not, so we need - * to make every effort to clean up all of our state here. Also, applications - * rarely check close errors and even if an error is returned they will not - * re-try the close call. - */ -int ll_file_release(struct inode *inode, struct file *file) -{ - struct ll_file_data *fd; - struct ll_sb_info *sbi = ll_i2sbi(inode); - struct ll_inode_info *lli = ll_i2info(inode); - int rc; - - CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p)\n", - PFID(ll_inode2fid(inode)), inode); - - if (!is_root_inode(inode)) - ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1); - fd = LUSTRE_FPRIVATE(file); - LASSERT(fd); - - /* The last ref on @file, maybe not be the owner pid of statahead, - * because parent and child process can share the same file handle. - */ - if (S_ISDIR(inode->i_mode) && lli->lli_opendir_key == fd) - ll_deauthorize_statahead(inode, fd); - - if (is_root_inode(inode)) { - LUSTRE_FPRIVATE(file) = NULL; - ll_file_data_put(fd); - return 0; - } - - if (!S_ISDIR(inode->i_mode)) { - if (lli->lli_clob) - lov_read_and_clear_async_rc(lli->lli_clob); - lli->lli_async_rc = 0; - } - - rc = ll_md_close(inode, file); - - if (CFS_FAIL_TIMEOUT_MS(OBD_FAIL_PTLRPC_DUMP_LOG, cfs_fail_val)) - libcfs_debug_dumplog(); - - return rc; -} - -static int ll_intent_file_open(struct dentry *de, void *lmm, int lmmsize, - struct lookup_intent *itp) -{ - struct inode *inode = d_inode(de); - struct ll_sb_info *sbi = ll_i2sbi(inode); - struct dentry *parent = de->d_parent; - const char *name = NULL; - struct md_op_data *op_data; - struct ptlrpc_request *req = NULL; - int len = 0, rc; - - LASSERT(parent); - LASSERT(itp->it_flags & MDS_OPEN_BY_FID); - - /* - * if server supports open-by-fid, or file name is invalid, don't pack - * name in open request - */ - if (!(exp_connect_flags(sbi->ll_md_exp) & OBD_CONNECT_OPEN_BY_FID) && - lu_name_is_valid_2(de->d_name.name, de->d_name.len)) { - name = de->d_name.name; - len = de->d_name.len; - } - - op_data = ll_prep_md_op_data(NULL, d_inode(parent), inode, name, len, - O_RDWR, LUSTRE_OPC_ANY, NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - op_data->op_data = lmm; - op_data->op_data_size = lmmsize; - - rc = md_intent_lock(sbi->ll_md_exp, op_data, itp, &req, - &ll_md_blocking_ast, 0); - ll_finish_md_op_data(op_data); - if (rc == -ESTALE) { - /* reason for keep own exit path - don`t flood log - * with messages with -ESTALE errors. - */ - if (!it_disposition(itp, DISP_OPEN_OPEN) || - it_open_error(DISP_OPEN_OPEN, itp)) - goto out; - ll_release_openhandle(inode, itp); - goto out; - } - - if (it_disposition(itp, DISP_LOOKUP_NEG)) { - rc = -ENOENT; - goto out; - } - - if (rc != 0 || it_open_error(DISP_OPEN_OPEN, itp)) { - rc = rc ? rc : it_open_error(DISP_OPEN_OPEN, itp); - CDEBUG(D_VFSTRACE, "lock enqueue: err: %d\n", rc); - goto out; - } - - rc = ll_prep_inode(&inode, req, NULL, itp); - if (!rc && itp->it_lock_mode) - ll_set_lock_data(sbi->ll_md_exp, inode, itp, NULL); - -out: - ptlrpc_req_finished(req); - ll_intent_drop_lock(itp); - - /* - * We did open by fid, but by the time we got to the server, - * the object disappeared. If this is a create, we cannot really - * tell the userspace that the file it was trying to create - * does not exist. Instead let's return -ESTALE, and the VFS will - * retry the create with LOOKUP_REVAL that we are going to catch - * in ll_revalidate_dentry() and use lookup then. - */ - if (rc == -ENOENT && itp->it_op & IT_CREAT) - rc = -ESTALE; - - return rc; -} - -static int ll_och_fill(struct obd_export *md_exp, struct lookup_intent *it, - struct obd_client_handle *och) -{ - struct mdt_body *body; - - body = req_capsule_server_get(&it->it_request->rq_pill, &RMF_MDT_BODY); - och->och_fh = body->mbo_handle; - och->och_fid = body->mbo_fid1; - och->och_lease_handle.cookie = it->it_lock_handle; - och->och_magic = OBD_CLIENT_HANDLE_MAGIC; - och->och_flags = it->it_flags; - - return md_set_open_replay_data(md_exp, och, it); -} - -static int ll_local_open(struct file *file, struct lookup_intent *it, - struct ll_file_data *fd, struct obd_client_handle *och) -{ - struct inode *inode = file_inode(file); - - LASSERT(!LUSTRE_FPRIVATE(file)); - - LASSERT(fd); - - if (och) { - int rc; - - rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och); - if (rc != 0) - return rc; - } - - LUSTRE_FPRIVATE(file) = fd; - ll_readahead_init(inode, &fd->fd_ras); - fd->fd_omode = it->it_flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); - - /* ll_cl_context initialize */ - rwlock_init(&fd->fd_lock); - INIT_LIST_HEAD(&fd->fd_lccs); - - return 0; -} - -/* Open a file, and (for the very first open) create objects on the OSTs at - * this time. If opened with O_LOV_DELAY_CREATE, then we don't do the object - * creation or open until ll_lov_setstripe() ioctl is called. - * - * If we already have the stripe MD locally then we don't request it in - * md_open(), by passing a lmm_size = 0. - * - * It is up to the application to ensure no other processes open this file - * in the O_LOV_DELAY_CREATE case, or the default striping pattern will be - * used. We might be able to avoid races of that sort by getting lli_open_sem - * before returning in the O_LOV_DELAY_CREATE case and dropping it here - * or in ll_file_release(), but I'm not sure that is desirable/necessary. - */ -int ll_file_open(struct inode *inode, struct file *file) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct lookup_intent *it, oit = { .it_op = IT_OPEN, - .it_flags = file->f_flags }; - struct obd_client_handle **och_p = NULL; - __u64 *och_usecount = NULL; - struct ll_file_data *fd; - int rc = 0; - - CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p), flags %o\n", - PFID(ll_inode2fid(inode)), inode, file->f_flags); - - it = file->private_data; /* XXX: compat macro */ - file->private_data = NULL; /* prevent ll_local_open assertion */ - - fd = ll_file_data_get(); - if (!fd) { - rc = -ENOMEM; - goto out_openerr; - } - - fd->fd_file = file; - if (S_ISDIR(inode->i_mode)) - ll_authorize_statahead(inode, fd); - - if (is_root_inode(inode)) { - LUSTRE_FPRIVATE(file) = fd; - return 0; - } - - if (!it || !it->it_disposition) { - /* Convert f_flags into access mode. We cannot use file->f_mode, - * because everything but O_ACCMODE mask was stripped from - * there - */ - if ((oit.it_flags + 1) & O_ACCMODE) - oit.it_flags++; - if (file->f_flags & O_TRUNC) - oit.it_flags |= FMODE_WRITE; - - /* kernel only call f_op->open in dentry_open. filp_open calls - * dentry_open after call to open_namei that checks permissions. - * Only nfsd_open call dentry_open directly without checking - * permissions and because of that this code below is safe. - */ - if (oit.it_flags & (FMODE_WRITE | FMODE_READ)) - oit.it_flags |= MDS_OPEN_OWNEROVERRIDE; - - /* We do not want O_EXCL here, presumably we opened the file - * already? XXX - NFS implications? - */ - oit.it_flags &= ~O_EXCL; - - /* bug20584, if "it_flags" contains O_CREAT, the file will be - * created if necessary, then "IT_CREAT" should be set to keep - * consistent with it - */ - if (oit.it_flags & O_CREAT) - oit.it_op |= IT_CREAT; - - it = &oit; - } - -restart: - /* Let's see if we have file open on MDS already. */ - if (it->it_flags & FMODE_WRITE) { - och_p = &lli->lli_mds_write_och; - och_usecount = &lli->lli_open_fd_write_count; - } else if (it->it_flags & FMODE_EXEC) { - och_p = &lli->lli_mds_exec_och; - och_usecount = &lli->lli_open_fd_exec_count; - } else { - och_p = &lli->lli_mds_read_och; - och_usecount = &lli->lli_open_fd_read_count; - } - - mutex_lock(&lli->lli_och_mutex); - if (*och_p) { /* Open handle is present */ - if (it_disposition(it, DISP_OPEN_OPEN)) { - /* Well, there's extra open request that we do not need, - * let's close it somehow. This will decref request. - */ - rc = it_open_error(DISP_OPEN_OPEN, it); - if (rc) { - mutex_unlock(&lli->lli_och_mutex); - goto out_openerr; - } - - ll_release_openhandle(inode, it); - } - (*och_usecount)++; - - rc = ll_local_open(file, it, fd, NULL); - if (rc) { - (*och_usecount)--; - mutex_unlock(&lli->lli_och_mutex); - goto out_openerr; - } - } else { - LASSERT(*och_usecount == 0); - if (!it->it_disposition) { - /* We cannot just request lock handle now, new ELC code - * means that one of other OPEN locks for this file - * could be cancelled, and since blocking ast handler - * would attempt to grab och_mutex as well, that would - * result in a deadlock - */ - mutex_unlock(&lli->lli_och_mutex); - /* - * Normally called under two situations: - * 1. NFS export. - * 2. revalidate with IT_OPEN (revalidate doesn't - * execute this intent any more). - * - * Always fetch MDS_OPEN_LOCK if this is not setstripe. - * - * Always specify MDS_OPEN_BY_FID because we don't want - * to get file with different fid. - */ - it->it_flags |= MDS_OPEN_LOCK | MDS_OPEN_BY_FID; - rc = ll_intent_file_open(file->f_path.dentry, - NULL, 0, it); - if (rc) - goto out_openerr; - - goto restart; - } - *och_p = kzalloc(sizeof(struct obd_client_handle), GFP_NOFS); - if (!*och_p) { - rc = -ENOMEM; - goto out_och_free; - } - - (*och_usecount)++; - - /* md_intent_lock() didn't get a request ref if there was an - * open error, so don't do cleanup on the request here - * (bug 3430) - */ - /* XXX (green): Should not we bail out on any error here, not - * just open error? - */ - rc = it_open_error(DISP_OPEN_OPEN, it); - if (rc) - goto out_och_free; - - LASSERTF(it_disposition(it, DISP_ENQ_OPEN_REF), - "inode %p: disposition %x, status %d\n", inode, - it_disposition(it, ~0), it->it_status); - - rc = ll_local_open(file, it, fd, *och_p); - if (rc) - goto out_och_free; - } - mutex_unlock(&lli->lli_och_mutex); - fd = NULL; - - /* Must do this outside lli_och_mutex lock to prevent deadlock where - * different kind of OPEN lock for this same inode gets cancelled - * by ldlm_cancel_lru - */ - if (!S_ISREG(inode->i_mode)) - goto out_och_free; - - cl_lov_delay_create_clear(&file->f_flags); - goto out_och_free; - -out_och_free: - if (rc) { - if (och_p && *och_p) { - kfree(*och_p); - *och_p = NULL; - (*och_usecount)--; - } - mutex_unlock(&lli->lli_och_mutex); - -out_openerr: - if (lli->lli_opendir_key == fd) - ll_deauthorize_statahead(inode, fd); - if (fd) - ll_file_data_put(fd); - } else { - ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_OPEN, 1); - } - - if (it && it_disposition(it, DISP_ENQ_OPEN_REF)) { - ptlrpc_req_finished(it->it_request); - it_clear_disposition(it, DISP_ENQ_OPEN_REF); - } - - 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. - */ -static struct obd_client_handle * -ll_lease_open(struct inode *inode, struct file *file, fmode_t fmode, - __u64 open_flags) -{ - 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 = NULL; - 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) { - 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) { - mutex_unlock(&lli->lli_och_mutex); - return ERR_PTR(rc); - } - - if (!fd->fd_och) { - if (file->f_mode & FMODE_WRITE) { - LASSERT(lli->lli_mds_write_och); - och_p = &lli->lli_mds_write_och; - och_usecount = &lli->lli_open_fd_write_count; - } else { - LASSERT(lli->lli_mds_read_och); - 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); - old_handle = fd->fd_och->och_fh; - } - - och = kzalloc(sizeof(*och), GFP_NOFS); - if (!och) - 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)) { - rc = PTR_ERR(op_data); - goto out; - } - - /* To tell the MDT this openhandle is from the same owner */ - op_data->op_handle = old_handle; - - it.it_flags = fmode | open_flags; - it.it_flags |= MDS_OPEN_LOCK | MDS_OPEN_BY_FID | MDS_OPEN_LEASE; - rc = md_intent_lock(sbi->ll_md_exp, op_data, &it, &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); - ptlrpc_req_finished(req); - if (rc < 0) - goto out_release_it; - - if (it_disposition(&it, DISP_LOOKUP_NEG)) { - rc = -ENOENT; - goto out_release_it; - } - - rc = it_open_error(DISP_OPEN_OPEN, &it); - if (rc) - goto out_release_it; - - 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? */ { - rc = -EOPNOTSUPP; - goto out_close; - } - - /* already get lease, handle lease lock */ - ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL); - if (it.it_lock_mode == 0 || - it.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.it_lock_mode, - it.it_lock_bits); - rc = -EPROTO; - goto out_close; - } - - ll_intent_release(&it); - return och; - -out_close: - /* Cancel open lock */ - if (it.it_lock_mode != 0) { - ldlm_lock_decref_and_cancel(&och->och_lease_handle, - it.it_lock_mode); - it.it_lock_mode = 0; - och->och_lease_handle.cookie = 0ULL; - } - rc2 = ll_close_inode_openhandle(inode, och, 0, NULL); - if (rc2 < 0) - CERROR("%s: error closing file " DFID ": %d\n", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(&ll_i2info(inode)->lli_fid), rc2); - och = NULL; /* och has been freed in ll_close_inode_openhandle() */ -out_release_it: - ll_intent_release(&it); -out: - kfree(och); - return ERR_PTR(rc); -} - -/** - * Check whether a layout swap can be done between two inodes. - * - * \param[in] inode1 First inode to check - * \param[in] inode2 Second inode to check - * - * \retval 0 on success, layout swap can be performed between both inodes - * \retval negative error code if requirements are not met - */ -static int ll_check_swap_layouts_validity(struct inode *inode1, - struct inode *inode2) -{ - if (!S_ISREG(inode1->i_mode) || !S_ISREG(inode2->i_mode)) - return -EINVAL; - - if (inode_permission(inode1, MAY_WRITE) || - inode_permission(inode2, MAY_WRITE)) - return -EPERM; - - if (inode1->i_sb != inode2->i_sb) - return -EXDEV; - - return 0; -} - -static int ll_swap_layouts_close(struct obd_client_handle *och, - struct inode *inode, struct inode *inode2) -{ - const struct lu_fid *fid1 = ll_inode2fid(inode); - const struct lu_fid *fid2; - int rc; - - CDEBUG(D_INODE, "%s: biased close of file " DFID "\n", - ll_get_fsname(inode->i_sb, NULL, 0), PFID(fid1)); - - rc = ll_check_swap_layouts_validity(inode, inode2); - if (rc < 0) - goto out_free_och; - - /* We now know that inode2 is a lustre inode */ - fid2 = ll_inode2fid(inode2); - - rc = lu_fid_cmp(fid1, fid2); - if (!rc) { - rc = -EINVAL; - goto out_free_och; - } - - /* - * Close the file and swap layouts between inode & inode2. - * NB: lease lock handle is released in mdc_close_layout_swap_pack() - * because we still need it to pack l_remote_handle to MDT. - */ - rc = ll_close_inode_openhandle(inode, och, MDS_CLOSE_LAYOUT_SWAP, - inode2); - - och = NULL; /* freed in ll_close_inode_openhandle() */ - -out_free_och: - kfree(och); - return rc; -} - -/** - * Release lease and close the file. - * It will check if the lease has ever broken. - */ -static int ll_lease_close(struct obd_client_handle *och, struct inode *inode, - bool *lease_broken) -{ - struct ldlm_lock *lock; - bool cancelled = true; - - lock = ldlm_handle2lock(&och->och_lease_handle); - if (lock) { - 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) - *lease_broken = cancelled; - - return ll_close_inode_openhandle(inode, och, 0, NULL); -} - -int ll_merge_attr(const struct lu_env *env, struct inode *inode) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct cl_object *obj = lli->lli_clob; - struct cl_attr *attr = vvp_env_thread_attr(env); - s64 atime; - s64 mtime; - s64 ctime; - int rc = 0; - - ll_inode_size_lock(inode); - - /* merge timestamps the most recently obtained from mds with - * timestamps obtained from osts - */ - LTIME_S(inode->i_atime) = lli->lli_atime; - LTIME_S(inode->i_mtime) = lli->lli_mtime; - LTIME_S(inode->i_ctime) = lli->lli_ctime; - - mtime = LTIME_S(inode->i_mtime); - atime = LTIME_S(inode->i_atime); - ctime = LTIME_S(inode->i_ctime); - - cl_object_attr_lock(obj); - rc = cl_object_attr_get(env, obj, attr); - cl_object_attr_unlock(obj); - - if (rc != 0) - goto out_size_unlock; - - if (atime < attr->cat_atime) - atime = attr->cat_atime; - - if (ctime < attr->cat_ctime) - ctime = attr->cat_ctime; - - if (mtime < attr->cat_mtime) - mtime = attr->cat_mtime; - - CDEBUG(D_VFSTRACE, DFID " updating i_size %llu\n", - PFID(&lli->lli_fid), attr->cat_size); - - i_size_write(inode, attr->cat_size); - - inode->i_blocks = attr->cat_blocks; - - LTIME_S(inode->i_mtime) = mtime; - LTIME_S(inode->i_atime) = atime; - LTIME_S(inode->i_ctime) = ctime; - -out_size_unlock: - ll_inode_size_unlock(inode); - - return rc; -} - -static bool file_is_noatime(const struct file *file) -{ - const struct vfsmount *mnt = file->f_path.mnt; - const struct inode *inode = file_inode(file); - - /* Adapted from file_accessed() and touch_atime().*/ - if (file->f_flags & O_NOATIME) - return true; - - if (inode->i_flags & S_NOATIME) - return true; - - if (IS_NOATIME(inode)) - return true; - - if (mnt->mnt_flags & (MNT_NOATIME | MNT_READONLY)) - return true; - - if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)) - return true; - - if ((inode->i_sb->s_flags & SB_NODIRATIME) && S_ISDIR(inode->i_mode)) - return true; - - return false; -} - -static void ll_io_init(struct cl_io *io, const struct file *file, int write) -{ - struct inode *inode = file_inode(file); - - io->u.ci_rw.crw_nonblock = file->f_flags & O_NONBLOCK; - if (write) { - io->u.ci_wr.wr_append = !!(file->f_flags & O_APPEND); - io->u.ci_wr.wr_sync = file->f_flags & O_SYNC || - file->f_flags & O_DIRECT || - IS_SYNC(inode); - } - io->ci_obj = ll_i2info(inode)->lli_clob; - io->ci_lockreq = CILR_MAYBE; - if (ll_file_nolock(file)) { - io->ci_lockreq = CILR_NEVER; - io->ci_no_srvlock = 1; - } else if (file->f_flags & O_APPEND) { - io->ci_lockreq = CILR_MANDATORY; - } - - io->ci_noatime = file_is_noatime(file); -} - -static ssize_t -ll_file_io_generic(const struct lu_env *env, struct vvp_io_args *args, - struct file *file, enum cl_io_type iot, - loff_t *ppos, size_t count) -{ - struct ll_inode_info *lli = ll_i2info(file_inode(file)); - struct ll_file_data *fd = LUSTRE_FPRIVATE(file); - struct vvp_io *vio = vvp_env_io(env); - struct range_lock range; - struct cl_io *io; - ssize_t result = 0; - int rc = 0; - - CDEBUG(D_VFSTRACE, "file: %pD, type: %d ppos: %llu, count: %zu\n", - file, iot, *ppos, count); - -restart: - io = vvp_env_thread_io(env); - ll_io_init(io, file, iot == CIT_WRITE); - - if (cl_io_rw_init(env, io, iot, *ppos, count) == 0) { - struct vvp_io *vio = vvp_env_io(env); - bool range_locked = false; - - if (file->f_flags & O_APPEND) - range_lock_init(&range, 0, LUSTRE_EOF); - else - range_lock_init(&range, *ppos, *ppos + count - 1); - - vio->vui_fd = LUSTRE_FPRIVATE(file); - vio->vui_iter = args->u.normal.via_iter; - vio->vui_iocb = args->u.normal.via_iocb; - /* - * Direct IO reads must also take range lock, - * or multiple reads will try to work on the same pages - * See LU-6227 for details. - */ - if (((iot == CIT_WRITE) || - (iot == CIT_READ && (file->f_flags & O_DIRECT))) && - !(vio->vui_fd->fd_flags & LL_FILE_GROUP_LOCKED)) { - CDEBUG(D_VFSTRACE, "Range lock [%llu, %llu]\n", - range.rl_node.in_extent.start, - range.rl_node.in_extent.end); - rc = range_lock(&lli->lli_write_tree, &range); - if (rc < 0) - goto out; - - range_locked = true; - } - ll_cl_add(file, env, io); - rc = cl_io_loop(env, io); - ll_cl_remove(file, env); - if (range_locked) { - CDEBUG(D_VFSTRACE, "Range unlock [%llu, %llu]\n", - range.rl_node.in_extent.start, - range.rl_node.in_extent.end); - range_unlock(&lli->lli_write_tree, &range); - } - } else { - /* cl_io_rw_init() handled IO */ - rc = io->ci_result; - } - - if (io->ci_nob > 0) { - result = io->ci_nob; - count -= io->ci_nob; - *ppos = io->u.ci_wr.wr.crw_pos; - - /* prepare IO restart */ - if (count > 0) - args->u.normal.via_iter = vio->vui_iter; - } -out: - cl_io_fini(env, io); - - if ((!rc || rc == -ENODATA) && count > 0 && io->ci_need_restart) { - CDEBUG(D_VFSTRACE, - "%s: restart %s from %lld, count:%zu, result: %zd\n", - file_dentry(file)->d_name.name, - iot == CIT_READ ? "read" : "write", - *ppos, count, result); - goto restart; - } - - if (iot == CIT_READ) { - if (result >= 0) - ll_stats_ops_tally(ll_i2sbi(file_inode(file)), - LPROC_LL_READ_BYTES, result); - } else if (iot == CIT_WRITE) { - if (result >= 0) { - ll_stats_ops_tally(ll_i2sbi(file_inode(file)), - LPROC_LL_WRITE_BYTES, result); - fd->fd_write_failed = false; - } else if (!result && !rc) { - rc = io->ci_result; - if (rc < 0) - fd->fd_write_failed = true; - else - fd->fd_write_failed = false; - } else if (rc != -ERESTARTSYS) { - fd->fd_write_failed = true; - } - } - CDEBUG(D_VFSTRACE, "iot: %d, result: %zd\n", iot, result); - - return result > 0 ? result : rc; -} - -static ssize_t ll_file_read_iter(struct kiocb *iocb, struct iov_iter *to) -{ - struct lu_env *env; - struct vvp_io_args *args; - ssize_t result; - u16 refcheck; - - env = cl_env_get(&refcheck); - if (IS_ERR(env)) - return PTR_ERR(env); - - args = ll_env_args(env); - args->u.normal.via_iter = to; - args->u.normal.via_iocb = iocb; - - result = ll_file_io_generic(env, args, iocb->ki_filp, CIT_READ, - &iocb->ki_pos, iov_iter_count(to)); - cl_env_put(env, &refcheck); - return result; -} - -/* - * Write to a file (through the page cache). - */ -static ssize_t ll_file_write_iter(struct kiocb *iocb, struct iov_iter *from) -{ - struct lu_env *env; - struct vvp_io_args *args; - ssize_t result; - u16 refcheck; - - env = cl_env_get(&refcheck); - if (IS_ERR(env)) - return PTR_ERR(env); - - args = ll_env_args(env); - args->u.normal.via_iter = from; - args->u.normal.via_iocb = iocb; - - result = ll_file_io_generic(env, args, iocb->ki_filp, CIT_WRITE, - &iocb->ki_pos, iov_iter_count(from)); - cl_env_put(env, &refcheck); - return result; -} - -int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry, - __u64 flags, struct lov_user_md *lum, - int lum_size) -{ - struct lookup_intent oit = { - .it_op = IT_OPEN, - .it_flags = flags | MDS_OPEN_BY_FID, - }; - int rc = 0; - - ll_inode_size_lock(inode); - rc = ll_intent_file_open(dentry, lum, lum_size, &oit); - if (rc < 0) - goto out_unlock; - - ll_release_openhandle(inode, &oit); - -out_unlock: - ll_inode_size_unlock(inode); - ll_intent_release(&oit); - return rc; -} - -int ll_lov_getstripe_ea_info(struct inode *inode, const char *filename, - struct lov_mds_md **lmmp, int *lmm_size, - struct ptlrpc_request **request) -{ - struct ll_sb_info *sbi = ll_i2sbi(inode); - struct mdt_body *body; - struct lov_mds_md *lmm = NULL; - struct ptlrpc_request *req = NULL; - struct md_op_data *op_data; - int rc, lmmsize; - - rc = ll_get_default_mdsize(sbi, &lmmsize); - if (rc) - return rc; - - op_data = ll_prep_md_op_data(NULL, inode, NULL, filename, - strlen(filename), lmmsize, - LUSTRE_OPC_ANY, NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - op_data->op_valid = OBD_MD_FLEASIZE | OBD_MD_FLDIREA; - rc = md_getattr_name(sbi->ll_md_exp, op_data, &req); - ll_finish_md_op_data(op_data); - if (rc < 0) { - CDEBUG(D_INFO, "md_getattr_name failed on %s: rc %d\n", - filename, rc); - goto out; - } - - body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); - - lmmsize = body->mbo_eadatasize; - - if (!(body->mbo_valid & (OBD_MD_FLEASIZE | OBD_MD_FLDIREA)) || - lmmsize == 0) { - rc = -ENODATA; - goto out; - } - - lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_MDT_MD, lmmsize); - - if ((lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V1)) && - (lmm->lmm_magic != cpu_to_le32(LOV_MAGIC_V3))) { - rc = -EPROTO; - goto out; - } - - /* - * This is coming from the MDS, so is probably in - * little endian. We convert it to host endian before - * passing it to userspace. - */ - if (cpu_to_le32(LOV_MAGIC) != LOV_MAGIC) { - int stripe_count; - - stripe_count = le16_to_cpu(lmm->lmm_stripe_count); - if (le32_to_cpu(lmm->lmm_pattern) & LOV_PATTERN_F_RELEASED) - stripe_count = 0; - - /* if function called for directory - we should - * avoid swab not existent lsm objects - */ - if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V1)) { - lustre_swab_lov_user_md_v1((struct lov_user_md_v1 *)lmm); - if (S_ISREG(body->mbo_mode)) - lustre_swab_lov_user_md_objects( - ((struct lov_user_md_v1 *)lmm)->lmm_objects, - stripe_count); - } else if (lmm->lmm_magic == cpu_to_le32(LOV_MAGIC_V3)) { - lustre_swab_lov_user_md_v3((struct lov_user_md_v3 *)lmm); - if (S_ISREG(body->mbo_mode)) - lustre_swab_lov_user_md_objects( - ((struct lov_user_md_v3 *)lmm)->lmm_objects, - stripe_count); - } - } - -out: - *lmmp = lmm; - *lmm_size = lmmsize; - *request = req; - return rc; -} - -static int ll_lov_setea(struct inode *inode, struct file *file, - unsigned long arg) -{ - __u64 flags = MDS_OPEN_HAS_OBJS | FMODE_WRITE; - struct lov_user_md *lump; - int lum_size = sizeof(struct lov_user_md) + - sizeof(struct lov_user_ost_data); - int rc; - - if (!capable(CAP_SYS_ADMIN)) - return -EPERM; - - lump = kzalloc(lum_size, GFP_NOFS); - if (!lump) - return -ENOMEM; - - if (copy_from_user(lump, (struct lov_user_md __user *)arg, lum_size)) { - kvfree(lump); - return -EFAULT; - } - - rc = ll_lov_setstripe_ea_info(inode, file->f_path.dentry, flags, lump, - lum_size); - cl_lov_delay_create_clear(&file->f_flags); - - kvfree(lump); - return rc; -} - -static int ll_file_getstripe(struct inode *inode, - struct lov_user_md __user *lum) -{ - struct lu_env *env; - u16 refcheck; - int rc; - - env = cl_env_get(&refcheck); - if (IS_ERR(env)) - return PTR_ERR(env); - - rc = cl_object_getstripe(env, ll_i2info(inode)->lli_clob, lum); - cl_env_put(env, &refcheck); - return rc; -} - -static int ll_lov_setstripe(struct inode *inode, struct file *file, - unsigned long arg) -{ - struct lov_user_md __user *lum = (struct lov_user_md __user *)arg; - struct lov_user_md *klum; - int lum_size, rc; - __u64 flags = FMODE_WRITE; - - rc = ll_copy_user_md(lum, &klum); - if (rc < 0) - return rc; - - lum_size = rc; - rc = ll_lov_setstripe_ea_info(inode, file->f_path.dentry, flags, klum, - lum_size); - cl_lov_delay_create_clear(&file->f_flags); - if (rc == 0) { - __u32 gen; - - put_user(0, &lum->lmm_stripe_count); - - ll_layout_refresh(inode, &gen); - rc = ll_file_getstripe(inode, (struct lov_user_md __user *)arg); - } - - kfree(klum); - return rc; -} - -static int -ll_get_grouplock(struct inode *inode, struct file *file, unsigned long arg) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct ll_file_data *fd = LUSTRE_FPRIVATE(file); - struct ll_grouplock grouplock; - int rc; - - if (arg == 0) { - CWARN("group id for group lock must not be 0\n"); - return -EINVAL; - } - - if (ll_file_nolock(file)) - return -EOPNOTSUPP; - - spin_lock(&lli->lli_lock); - if (fd->fd_flags & LL_FILE_GROUP_LOCKED) { - CWARN("group lock already existed with gid %lu\n", - fd->fd_grouplock.lg_gid); - spin_unlock(&lli->lli_lock); - return -EINVAL; - } - LASSERT(!fd->fd_grouplock.lg_lock); - spin_unlock(&lli->lli_lock); - - rc = cl_get_grouplock(ll_i2info(inode)->lli_clob, - arg, (file->f_flags & O_NONBLOCK), &grouplock); - if (rc) - return rc; - - spin_lock(&lli->lli_lock); - if (fd->fd_flags & LL_FILE_GROUP_LOCKED) { - spin_unlock(&lli->lli_lock); - CERROR("another thread just won the race\n"); - cl_put_grouplock(&grouplock); - return -EINVAL; - } - - fd->fd_flags |= LL_FILE_GROUP_LOCKED; - fd->fd_grouplock = grouplock; - spin_unlock(&lli->lli_lock); - - CDEBUG(D_INFO, "group lock %lu obtained\n", arg); - return 0; -} - -static int ll_put_grouplock(struct inode *inode, struct file *file, - unsigned long arg) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct ll_file_data *fd = LUSTRE_FPRIVATE(file); - struct ll_grouplock grouplock; - - spin_lock(&lli->lli_lock); - if (!(fd->fd_flags & LL_FILE_GROUP_LOCKED)) { - spin_unlock(&lli->lli_lock); - CWARN("no group lock held\n"); - return -EINVAL; - } - LASSERT(fd->fd_grouplock.lg_lock); - - if (fd->fd_grouplock.lg_gid != arg) { - CWARN("group lock %lu doesn't match current id %lu\n", - arg, fd->fd_grouplock.lg_gid); - spin_unlock(&lli->lli_lock); - return -EINVAL; - } - - grouplock = fd->fd_grouplock; - memset(&fd->fd_grouplock, 0, sizeof(fd->fd_grouplock)); - fd->fd_flags &= ~LL_FILE_GROUP_LOCKED; - spin_unlock(&lli->lli_lock); - - cl_put_grouplock(&grouplock); - CDEBUG(D_INFO, "group lock %lu released\n", arg); - return 0; -} - -/** - * Close inode open handle - * - * \param inode [in] inode in question - * \param it [in,out] intent which contains open info and result - * - * \retval 0 success - * \retval <0 failure - */ -int ll_release_openhandle(struct inode *inode, struct lookup_intent *it) -{ - struct obd_client_handle *och; - int rc; - - LASSERT(inode); - - /* Root ? Do nothing. */ - if (is_root_inode(inode)) - return 0; - - /* No open handle to close? Move away */ - if (!it_disposition(it, DISP_OPEN_OPEN)) - return 0; - - LASSERT(it_open_error(DISP_OPEN_OPEN, it) == 0); - - och = kzalloc(sizeof(*och), GFP_NOFS); - if (!och) { - rc = -ENOMEM; - goto out; - } - - ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och); - - rc = ll_close_inode_openhandle(inode, och, 0, NULL); -out: - /* this one is in place of ll_file_open */ - if (it_disposition(it, DISP_ENQ_OPEN_REF)) { - ptlrpc_req_finished(it->it_request); - it_clear_disposition(it, DISP_ENQ_OPEN_REF); - } - return rc; -} - -/** - * Get size for inode for which FIEMAP mapping is requested. - * Make the FIEMAP get_info call and returns the result. - * - * \param fiemap kernel buffer to hold extens - * \param num_bytes kernel buffer size - */ -static int ll_do_fiemap(struct inode *inode, struct fiemap *fiemap, - size_t num_bytes) -{ - struct ll_fiemap_info_key fmkey = { .lfik_name = KEY_FIEMAP, }; - struct lu_env *env; - u16 refcheck; - int rc = 0; - - /* Checks for fiemap flags */ - if (fiemap->fm_flags & ~LUSTRE_FIEMAP_FLAGS_COMPAT) { - fiemap->fm_flags &= ~LUSTRE_FIEMAP_FLAGS_COMPAT; - return -EBADR; - } - - /* Check for FIEMAP_FLAG_SYNC */ - if (fiemap->fm_flags & FIEMAP_FLAG_SYNC) { - rc = filemap_fdatawrite(inode->i_mapping); - if (rc) - return rc; - } - - env = cl_env_get(&refcheck); - if (IS_ERR(env)) - return PTR_ERR(env); - - if (i_size_read(inode) == 0) { - rc = ll_glimpse_size(inode); - if (rc) - goto out; - } - - fmkey.lfik_oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP; - obdo_from_inode(&fmkey.lfik_oa, inode, OBD_MD_FLSIZE); - obdo_set_parent_fid(&fmkey.lfik_oa, &ll_i2info(inode)->lli_fid); - - /* If filesize is 0, then there would be no objects for mapping */ - if (fmkey.lfik_oa.o_size == 0) { - fiemap->fm_mapped_extents = 0; - rc = 0; - goto out; - } - - memcpy(&fmkey.lfik_fiemap, fiemap, sizeof(*fiemap)); - - rc = cl_object_fiemap(env, ll_i2info(inode)->lli_clob, - &fmkey, fiemap, &num_bytes); -out: - cl_env_put(env, &refcheck); - return rc; -} - -int ll_fid2path(struct inode *inode, void __user *arg) -{ - struct obd_export *exp = ll_i2mdexp(inode); - const struct getinfo_fid2path __user *gfin = arg; - struct getinfo_fid2path *gfout; - u32 pathlen; - size_t outsize; - int rc; - - if (!capable(CAP_DAC_READ_SEARCH) && - !(ll_i2sbi(inode)->ll_flags & LL_SBI_USER_FID2PATH)) - return -EPERM; - - /* Only need to get the buflen */ - if (get_user(pathlen, &gfin->gf_pathlen)) - return -EFAULT; - - if (pathlen > PATH_MAX) - return -EINVAL; - - outsize = sizeof(*gfout) + pathlen; - - gfout = kzalloc(outsize, GFP_NOFS); - if (!gfout) - return -ENOMEM; - - if (copy_from_user(gfout, arg, sizeof(*gfout))) { - rc = -EFAULT; - goto gf_free; - } - - /* Call mdc_iocontrol */ - rc = obd_iocontrol(OBD_IOC_FID2PATH, exp, outsize, gfout, NULL); - if (rc != 0) - goto gf_free; - - if (copy_to_user(arg, gfout, outsize)) - rc = -EFAULT; - -gf_free: - kfree(gfout); - return rc; -} - -/* - * Read the data_version for inode. - * - * This value is computed using stripe object version on OST. - * Version is computed using server side locking. - * - * @param flags if do sync on the OST side; - * 0: no sync - * LL_DV_RD_FLUSH: flush dirty pages, LCK_PR on OSTs - * LL_DV_WR_FLUSH: drop all caching pages, LCK_PW on OSTs - */ -int ll_data_version(struct inode *inode, __u64 *data_version, int flags) -{ - struct cl_object *obj = ll_i2info(inode)->lli_clob; - struct lu_env *env; - struct cl_io *io; - u16 refcheck; - int result; - - /* If no file object initialized, we consider its version is 0. */ - if (!obj) { - *data_version = 0; - return 0; - } - - env = cl_env_get(&refcheck); - if (IS_ERR(env)) - return PTR_ERR(env); - - io = vvp_env_thread_io(env); - io->ci_obj = obj; - io->u.ci_data_version.dv_data_version = 0; - io->u.ci_data_version.dv_flags = flags; - -restart: - if (!cl_io_init(env, io, CIT_DATA_VERSION, io->ci_obj)) - result = cl_io_loop(env, io); - else - result = io->ci_result; - - *data_version = io->u.ci_data_version.dv_data_version; - - cl_io_fini(env, io); - - if (unlikely(io->ci_need_restart)) - goto restart; - - cl_env_put(env, &refcheck); - - return result; -} - -/* - * Trigger a HSM release request for the provided inode. - */ -int ll_hsm_release(struct inode *inode) -{ - struct lu_env *env; - struct obd_client_handle *och = NULL; - __u64 data_version = 0; - int rc; - u16 refcheck; - - CDEBUG(D_INODE, "%s: Releasing file " DFID ".\n", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(&ll_i2info(inode)->lli_fid)); - - och = ll_lease_open(inode, NULL, FMODE_WRITE, MDS_OPEN_RELEASE); - if (IS_ERR(och)) { - rc = PTR_ERR(och); - goto out; - } - - /* Grab latest data_version and [am]time values */ - rc = ll_data_version(inode, &data_version, LL_DV_WR_FLUSH); - if (rc != 0) - goto out; - - env = cl_env_get(&refcheck); - if (IS_ERR(env)) { - rc = PTR_ERR(env); - goto out; - } - - ll_merge_attr(env, inode); - cl_env_put(env, &refcheck); - - /* Release the file. - * NB: lease lock handle is released in mdc_hsm_release_pack() because - * we still need it to pack l_remote_handle to MDT. - */ - rc = ll_close_inode_openhandle(inode, och, MDS_HSM_RELEASE, - &data_version); - och = NULL; - -out: - if (och && !IS_ERR(och)) /* close the file */ - ll_lease_close(och, inode, NULL); - - return rc; -} - -struct ll_swap_stack { - u64 dv1; - u64 dv2; - struct inode *inode1; - struct inode *inode2; - bool check_dv1; - bool check_dv2; -}; - -static int ll_swap_layouts(struct file *file1, struct file *file2, - struct lustre_swap_layouts *lsl) -{ - struct mdc_swap_layouts msl; - struct md_op_data *op_data; - __u32 gid; - __u64 dv; - struct ll_swap_stack *llss = NULL; - int rc; - - llss = kzalloc(sizeof(*llss), GFP_NOFS); - if (!llss) - return -ENOMEM; - - llss->inode1 = file_inode(file1); - llss->inode2 = file_inode(file2); - - rc = ll_check_swap_layouts_validity(llss->inode1, llss->inode2); - if (rc < 0) - goto free; - - /* we use 2 bool because it is easier to swap than 2 bits */ - if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV1) - llss->check_dv1 = true; - - if (lsl->sl_flags & SWAP_LAYOUTS_CHECK_DV2) - llss->check_dv2 = true; - - /* we cannot use lsl->sl_dvX directly because we may swap them */ - llss->dv1 = lsl->sl_dv1; - llss->dv2 = lsl->sl_dv2; - - rc = lu_fid_cmp(ll_inode2fid(llss->inode1), ll_inode2fid(llss->inode2)); - if (!rc) /* same file, done! */ - goto free; - - if (rc < 0) { /* sequentialize it */ - swap(llss->inode1, llss->inode2); - swap(file1, file2); - swap(llss->dv1, llss->dv2); - swap(llss->check_dv1, llss->check_dv2); - } - - gid = lsl->sl_gid; - if (gid != 0) { /* application asks to flush dirty cache */ - rc = ll_get_grouplock(llss->inode1, file1, gid); - if (rc < 0) - goto free; - - rc = ll_get_grouplock(llss->inode2, file2, gid); - if (rc < 0) { - ll_put_grouplock(llss->inode1, file1, gid); - goto free; - } - } - - /* ultimate check, before swapping the layouts we check if - * dataversion has changed (if requested) - */ - if (llss->check_dv1) { - rc = ll_data_version(llss->inode1, &dv, 0); - if (rc) - goto putgl; - if (dv != llss->dv1) { - rc = -EAGAIN; - goto putgl; - } - } - - if (llss->check_dv2) { - rc = ll_data_version(llss->inode2, &dv, 0); - if (rc) - goto putgl; - if (dv != llss->dv2) { - rc = -EAGAIN; - goto putgl; - } - } - - /* struct md_op_data is used to send the swap args to the mdt - * only flags is missing, so we use struct mdc_swap_layouts - * through the md_op_data->op_data - */ - /* flags from user space have to be converted before they are send to - * server, no flag is sent today, they are only used on the client - */ - msl.msl_flags = 0; - rc = -ENOMEM; - op_data = ll_prep_md_op_data(NULL, llss->inode1, llss->inode2, NULL, 0, - 0, LUSTRE_OPC_ANY, &msl); - if (IS_ERR(op_data)) { - rc = PTR_ERR(op_data); - goto free; - } - - rc = obd_iocontrol(LL_IOC_LOV_SWAP_LAYOUTS, ll_i2mdexp(llss->inode1), - sizeof(*op_data), op_data, NULL); - ll_finish_md_op_data(op_data); - -putgl: - if (gid != 0) { - ll_put_grouplock(llss->inode2, file2, gid); - ll_put_grouplock(llss->inode1, file1, gid); - } - -free: - kfree(llss); - - return rc; -} - -int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss) -{ - struct md_op_data *op_data; - int rc; - - /* Detect out-of range masks */ - if ((hss->hss_setmask | hss->hss_clearmask) & ~HSM_FLAGS_MASK) - return -EINVAL; - - /* Non-root users are forbidden to set or clear flags which are - * NOT defined in HSM_USER_MASK. - */ - if (((hss->hss_setmask | hss->hss_clearmask) & ~HSM_USER_MASK) && - !capable(CAP_SYS_ADMIN)) - return -EPERM; - - /* Detect out-of range archive id */ - if ((hss->hss_valid & HSS_ARCHIVE_ID) && - (hss->hss_archive_id > LL_HSM_MAX_ARCHIVE)) - return -EINVAL; - - op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0, - LUSTRE_OPC_ANY, hss); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - rc = obd_iocontrol(LL_IOC_HSM_STATE_SET, ll_i2mdexp(inode), - sizeof(*op_data), op_data, NULL); - - ll_finish_md_op_data(op_data); - - return rc; -} - -static int ll_hsm_import(struct inode *inode, struct file *file, - struct hsm_user_import *hui) -{ - struct hsm_state_set *hss = NULL; - struct iattr *attr = NULL; - int rc; - - if (!S_ISREG(inode->i_mode)) - return -EINVAL; - - /* set HSM flags */ - hss = kzalloc(sizeof(*hss), GFP_NOFS); - if (!hss) - return -ENOMEM; - - hss->hss_valid = HSS_SETMASK | HSS_ARCHIVE_ID; - hss->hss_archive_id = hui->hui_archive_id; - hss->hss_setmask = HS_ARCHIVED | HS_EXISTS | HS_RELEASED; - rc = ll_hsm_state_set(inode, hss); - if (rc != 0) - goto free_hss; - - attr = kzalloc(sizeof(*attr), GFP_NOFS); - if (!attr) { - rc = -ENOMEM; - goto free_hss; - } - - attr->ia_mode = hui->hui_mode & 0777; - attr->ia_mode |= S_IFREG; - attr->ia_uid = make_kuid(&init_user_ns, hui->hui_uid); - attr->ia_gid = make_kgid(&init_user_ns, hui->hui_gid); - attr->ia_size = hui->hui_size; - attr->ia_mtime.tv_sec = hui->hui_mtime; - attr->ia_mtime.tv_nsec = hui->hui_mtime_ns; - attr->ia_atime.tv_sec = hui->hui_atime; - attr->ia_atime.tv_nsec = hui->hui_atime_ns; - - attr->ia_valid = ATTR_SIZE | ATTR_MODE | ATTR_FORCE | - ATTR_UID | ATTR_GID | - ATTR_MTIME | ATTR_MTIME_SET | - ATTR_ATIME | ATTR_ATIME_SET; - - inode_lock(inode); - - rc = ll_setattr_raw(file->f_path.dentry, attr, true); - if (rc == -ENODATA) - rc = 0; - - inode_unlock(inode); - - kfree(attr); -free_hss: - kfree(hss); - return rc; -} - -static inline long ll_lease_type_from_fmode(fmode_t fmode) -{ - return ((fmode & FMODE_READ) ? LL_LEASE_RDLCK : 0) | - ((fmode & FMODE_WRITE) ? LL_LEASE_WRLCK : 0); -} - -static long -ll_file_ioctl(struct file *file, unsigned int cmd, unsigned long arg) -{ - struct inode *inode = file_inode(file); - struct ll_file_data *fd = LUSTRE_FPRIVATE(file); - int flags, rc; - - CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p),cmd=%x\n", - PFID(ll_inode2fid(inode)), inode, cmd); - ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_IOCTL, 1); - - /* asm-ppc{,64} declares TCGETS, et. al. as type 't' not 'T' */ - if (_IOC_TYPE(cmd) == 'T' || _IOC_TYPE(cmd) == 't') /* tty ioctls */ - return -ENOTTY; - - switch (cmd) { - case LL_IOC_GETFLAGS: - /* Get the current value of the file flags */ - return put_user(fd->fd_flags, (int __user *)arg); - case LL_IOC_SETFLAGS: - case LL_IOC_CLRFLAGS: - /* Set or clear specific file flags */ - /* XXX This probably needs checks to ensure the flags are - * not abused, and to handle any flag side effects. - */ - if (get_user(flags, (int __user *)arg)) - return -EFAULT; - - if (cmd == LL_IOC_SETFLAGS) { - if ((flags & LL_FILE_IGNORE_LOCK) && - !(file->f_flags & O_DIRECT)) { - CERROR("%s: unable to disable locking on non-O_DIRECT file\n", - current->comm); - return -EINVAL; - } - - fd->fd_flags |= flags; - } else { - fd->fd_flags &= ~flags; - } - return 0; - case LL_IOC_LOV_SETSTRIPE: - return ll_lov_setstripe(inode, file, arg); - case LL_IOC_LOV_SETEA: - return ll_lov_setea(inode, file, arg); - case LL_IOC_LOV_SWAP_LAYOUTS: { - struct file *file2; - struct lustre_swap_layouts lsl; - - if (copy_from_user(&lsl, (char __user *)arg, - sizeof(struct lustre_swap_layouts))) - return -EFAULT; - - if ((file->f_flags & O_ACCMODE) == O_RDONLY) - return -EPERM; - - file2 = fget(lsl.sl_fd); - if (!file2) - return -EBADF; - - /* O_WRONLY or O_RDWR */ - if ((file2->f_flags & O_ACCMODE) == O_RDONLY) { - rc = -EPERM; - goto out; - } - - if (lsl.sl_flags & SWAP_LAYOUTS_CLOSE) { - struct obd_client_handle *och = NULL; - struct ll_inode_info *lli; - struct inode *inode2; - - if (lsl.sl_flags != SWAP_LAYOUTS_CLOSE) { - rc = -EINVAL; - goto out; - } - - lli = ll_i2info(inode); - mutex_lock(&lli->lli_och_mutex); - if (fd->fd_lease_och) { - och = fd->fd_lease_och; - fd->fd_lease_och = NULL; - } - mutex_unlock(&lli->lli_och_mutex); - if (!och) { - rc = -ENOLCK; - goto out; - } - inode2 = file_inode(file2); - rc = ll_swap_layouts_close(och, inode, inode2); - } else { - rc = ll_swap_layouts(file, file2, &lsl); - } -out: - fput(file2); - return rc; - } - case LL_IOC_LOV_GETSTRIPE: - return ll_file_getstripe(inode, - (struct lov_user_md __user *)arg); - case FSFILT_IOC_GETFLAGS: - case FSFILT_IOC_SETFLAGS: - return ll_iocontrol(inode, file, cmd, arg); - case FSFILT_IOC_GETVERSION_OLD: - case FSFILT_IOC_GETVERSION: - return put_user(inode->i_generation, (int __user *)arg); - case LL_IOC_GROUP_LOCK: - return ll_get_grouplock(inode, file, arg); - case LL_IOC_GROUP_UNLOCK: - return ll_put_grouplock(inode, file, arg); - case IOC_OBD_STATFS: - return ll_obd_statfs(inode, (void __user *)arg); - - /* We need to special case any other ioctls we want to handle, - * to send them to the MDS/OST as appropriate and to properly - * network encode the arg field. - case FSFILT_IOC_SETVERSION_OLD: - case FSFILT_IOC_SETVERSION: - */ - case LL_IOC_FLUSHCTX: - return ll_flush_ctx(inode); - case LL_IOC_PATH2FID: { - if (copy_to_user((void __user *)arg, ll_inode2fid(inode), - sizeof(struct lu_fid))) - return -EFAULT; - - return 0; - } - case LL_IOC_GETPARENT: - return ll_getparent(file, (struct getparent __user *)arg); - case OBD_IOC_FID2PATH: - return ll_fid2path(inode, (void __user *)arg); - case LL_IOC_DATA_VERSION: { - struct ioc_data_version idv; - int rc; - - if (copy_from_user(&idv, (char __user *)arg, sizeof(idv))) - return -EFAULT; - - idv.idv_flags &= LL_DV_RD_FLUSH | LL_DV_WR_FLUSH; - rc = ll_data_version(inode, &idv.idv_version, idv.idv_flags); - if (rc == 0 && copy_to_user((char __user *)arg, &idv, - sizeof(idv))) - return -EFAULT; - - return rc; - } - - case LL_IOC_GET_MDTIDX: { - int mdtidx; - - mdtidx = ll_get_mdt_idx(inode); - if (mdtidx < 0) - return mdtidx; - - if (put_user(mdtidx, (int __user *)arg)) - return -EFAULT; - - return 0; - } - case OBD_IOC_GETDTNAME: - case OBD_IOC_GETMDNAME: - return ll_get_obd_name(inode, cmd, arg); - case LL_IOC_HSM_STATE_GET: { - struct md_op_data *op_data; - struct hsm_user_state *hus; - int rc; - - hus = kzalloc(sizeof(*hus), GFP_NOFS); - if (!hus) - return -ENOMEM; - - op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0, - LUSTRE_OPC_ANY, hus); - if (IS_ERR(op_data)) { - kfree(hus); - return PTR_ERR(op_data); - } - - rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data), - op_data, NULL); - - if (copy_to_user((void __user *)arg, hus, sizeof(*hus))) - rc = -EFAULT; - - ll_finish_md_op_data(op_data); - kfree(hus); - return rc; - } - case LL_IOC_HSM_STATE_SET: { - struct hsm_state_set *hss; - int rc; - - hss = memdup_user((char __user *)arg, sizeof(*hss)); - if (IS_ERR(hss)) - return PTR_ERR(hss); - - rc = ll_hsm_state_set(inode, hss); - - kfree(hss); - return rc; - } - case LL_IOC_HSM_ACTION: { - struct md_op_data *op_data; - struct hsm_current_action *hca; - int rc; - - hca = kzalloc(sizeof(*hca), GFP_NOFS); - if (!hca) - return -ENOMEM; - - op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0, - LUSTRE_OPC_ANY, hca); - if (IS_ERR(op_data)) { - kfree(hca); - return PTR_ERR(op_data); - } - - rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data), - op_data, NULL); - - if (copy_to_user((char __user *)arg, hca, sizeof(*hca))) - rc = -EFAULT; - - ll_finish_md_op_data(op_data); - kfree(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 fmode; - - switch (arg) { - case LL_LEASE_WRLCK: - if (!(file->f_mode & FMODE_WRITE)) - return -EPERM; - fmode = FMODE_WRITE; - break; - case LL_LEASE_RDLCK: - if (!(file->f_mode & FMODE_READ)) - return -EPERM; - fmode = FMODE_READ; - break; - case LL_LEASE_UNLCK: - mutex_lock(&lli->lli_och_mutex); - if (fd->fd_lease_och) { - och = fd->fd_lease_och; - fd->fd_lease_och = NULL; - } - mutex_unlock(&lli->lli_och_mutex); - - if (!och) - return -ENOLCK; - - fmode = och->och_flags; - rc = ll_lease_close(och, inode, &lease_broken); - if (rc < 0) - return rc; - - if (lease_broken) - fmode = 0; - - return ll_lease_type_from_fmode(fmode); - default: - return -EINVAL; - } - - CDEBUG(D_INODE, "Set lease with mode %u\n", fmode); - - /* apply for lease */ - och = ll_lease_open(inode, file, fmode, 0); - if (IS_ERR(och)) - return PTR_ERR(och); - - rc = 0; - mutex_lock(&lli->lli_och_mutex); - if (!fd->fd_lease_och) { - fd->fd_lease_och = och; - och = NULL; - } - mutex_unlock(&lli->lli_och_mutex); - if (och) { - /* 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; - fmode_t fmode = 0; - - mutex_lock(&lli->lli_och_mutex); - if (fd->fd_lease_och) { - struct obd_client_handle *och = fd->fd_lease_och; - - lock = ldlm_handle2lock(&och->och_lease_handle); - if (lock) { - lock_res_and_lock(lock); - if (!ldlm_is_cancel(lock)) - fmode = och->och_flags; - unlock_res_and_lock(lock); - LDLM_LOCK_PUT(lock); - } - } - mutex_unlock(&lli->lli_och_mutex); - return ll_lease_type_from_fmode(fmode); - } - case LL_IOC_HSM_IMPORT: { - struct hsm_user_import *hui; - - hui = memdup_user((void __user *)arg, sizeof(*hui)); - if (IS_ERR(hui)) - return PTR_ERR(hui); - - rc = ll_hsm_import(inode, file, hui); - - kfree(hui); - return rc; - } - default: { - int err; - - if (ll_iocontrol_call(inode, file, cmd, arg, &err) == - LLIOC_STOP) - return err; - - return obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL, - (void __user *)arg); - } - } -} - -static loff_t ll_file_seek(struct file *file, loff_t offset, int origin) -{ - struct inode *inode = file_inode(file); - loff_t retval, eof = 0; - - retval = offset + ((origin == SEEK_END) ? i_size_read(inode) : - (origin == SEEK_CUR) ? file->f_pos : 0); - CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p), to=%llu=%#llx(%d)\n", - PFID(ll_inode2fid(inode)), inode, retval, retval, origin); - ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_LLSEEK, 1); - - if (origin == SEEK_END || origin == SEEK_HOLE || origin == SEEK_DATA) { - retval = ll_glimpse_size(inode); - if (retval != 0) - return retval; - eof = i_size_read(inode); - } - - return generic_file_llseek_size(file, offset, origin, - ll_file_maxbytes(inode), eof); -} - -static int ll_flush(struct file *file, fl_owner_t id) -{ - struct inode *inode = file_inode(file); - struct ll_inode_info *lli = ll_i2info(inode); - struct ll_file_data *fd = LUSTRE_FPRIVATE(file); - int rc, err; - - LASSERT(!S_ISDIR(inode->i_mode)); - - /* catch async errors that were recorded back when async writeback - * failed for pages in this mapping. - */ - rc = lli->lli_async_rc; - lli->lli_async_rc = 0; - if (lli->lli_clob) { - err = lov_read_and_clear_async_rc(lli->lli_clob); - if (!rc) - rc = err; - } - - /* The application has been told about write failure already. - * Do not report failure again. - */ - if (fd->fd_write_failed) - return 0; - return rc ? -EIO : 0; -} - -/** - * Called to make sure a portion of file has been written out. - * if @mode is not CL_FSYNC_LOCAL, it will send OST_SYNC RPCs to OST. - * - * Return how many pages have been written. - */ -int cl_sync_file_range(struct inode *inode, loff_t start, loff_t end, - enum cl_fsync_mode mode, int ignore_layout) -{ - struct lu_env *env; - struct cl_io *io; - struct cl_fsync_io *fio; - int result; - u16 refcheck; - - if (mode != CL_FSYNC_NONE && mode != CL_FSYNC_LOCAL && - mode != CL_FSYNC_DISCARD && mode != CL_FSYNC_ALL) - return -EINVAL; - - env = cl_env_get(&refcheck); - if (IS_ERR(env)) - return PTR_ERR(env); - - io = vvp_env_thread_io(env); - io->ci_obj = ll_i2info(inode)->lli_clob; - io->ci_ignore_layout = ignore_layout; - - /* initialize parameters for sync */ - fio = &io->u.ci_fsync; - fio->fi_start = start; - fio->fi_end = end; - fio->fi_fid = ll_inode2fid(inode); - fio->fi_mode = mode; - fio->fi_nr_written = 0; - - if (cl_io_init(env, io, CIT_FSYNC, io->ci_obj) == 0) - result = cl_io_loop(env, io); - else - result = io->ci_result; - if (result == 0) - result = fio->fi_nr_written; - cl_io_fini(env, io); - cl_env_put(env, &refcheck); - - return result; -} - -int ll_fsync(struct file *file, loff_t start, loff_t end, int datasync) -{ - struct inode *inode = file_inode(file); - struct ll_inode_info *lli = ll_i2info(inode); - struct ptlrpc_request *req; - int rc, err; - - CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p)\n", - PFID(ll_inode2fid(inode)), inode); - ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1); - - rc = file_write_and_wait_range(file, start, end); - inode_lock(inode); - - /* catch async errors that were recorded back when async writeback - * failed for pages in this mapping. - */ - if (!S_ISDIR(inode->i_mode)) { - err = lli->lli_async_rc; - lli->lli_async_rc = 0; - if (rc == 0) - rc = err; - if (lli->lli_clob) { - err = lov_read_and_clear_async_rc(lli->lli_clob); - if (rc == 0) - rc = err; - } - } - - err = md_sync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), &req); - if (!rc) - rc = err; - if (!err) - ptlrpc_req_finished(req); - - if (S_ISREG(inode->i_mode)) { - struct ll_file_data *fd = LUSTRE_FPRIVATE(file); - - err = cl_sync_file_range(inode, start, end, CL_FSYNC_ALL, 0); - if (rc == 0 && err < 0) - rc = err; - if (rc < 0) - fd->fd_write_failed = true; - else - fd->fd_write_failed = false; - } - - inode_unlock(inode); - return rc; -} - -static int -ll_file_flock(struct file *file, int cmd, struct file_lock *file_lock) -{ - struct inode *inode = file_inode(file); - struct ll_sb_info *sbi = ll_i2sbi(inode); - struct ldlm_enqueue_info einfo = { - .ei_type = LDLM_FLOCK, - .ei_cb_cp = ldlm_flock_completion_ast, - .ei_cbdata = file_lock, - }; - struct md_op_data *op_data; - struct lustre_handle lockh = {0}; - union ldlm_policy_data flock = { { 0 } }; - int fl_type = file_lock->fl_type; - __u64 flags = 0; - int rc; - int rc2 = 0; - - CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID " file_lock=%p\n", - PFID(ll_inode2fid(inode)), file_lock); - - ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FLOCK, 1); - - if (file_lock->fl_flags & FL_FLOCK) - LASSERT((cmd == F_SETLKW) || (cmd == F_SETLK)); - else if (!(file_lock->fl_flags & FL_POSIX)) - return -EINVAL; - - flock.l_flock.owner = (unsigned long)file_lock->fl_owner; - flock.l_flock.pid = file_lock->fl_pid; - flock.l_flock.start = file_lock->fl_start; - flock.l_flock.end = file_lock->fl_end; - - /* Somewhat ugly workaround for svc lockd. - * lockd installs custom fl_lmops->lm_compare_owner that checks - * for the fl_owner to be the same (which it always is on local node - * I guess between lockd processes) and then compares pid. - * As such we assign pid to the owner field to make it all work, - * conflict with normal locks is unlikely since pid space and - * pointer space for current->files are not intersecting - */ - if (file_lock->fl_lmops && file_lock->fl_lmops->lm_compare_owner) - flock.l_flock.owner = (unsigned long)file_lock->fl_pid; - - switch (fl_type) { - case F_RDLCK: - einfo.ei_mode = LCK_PR; - break; - case F_UNLCK: - /* An unlock request may or may not have any relation to - * existing locks so we may not be able to pass a lock handle - * via a normal ldlm_lock_cancel() request. The request may even - * unlock a byte range in the middle of an existing lock. In - * order to process an unlock request we need all of the same - * information that is given with a normal read or write record - * lock request. To avoid creating another ldlm unlock (cancel) - * message we'll treat a LCK_NL flock request as an unlock. - */ - einfo.ei_mode = LCK_NL; - break; - case F_WRLCK: - einfo.ei_mode = LCK_PW; - break; - default: - CDEBUG(D_INFO, "Unknown fcntl lock type: %d\n", fl_type); - return -ENOTSUPP; - } - - switch (cmd) { - case F_SETLKW: -#ifdef F_SETLKW64 - case F_SETLKW64: -#endif - flags = 0; - break; - case F_SETLK: -#ifdef F_SETLK64 - case F_SETLK64: -#endif - flags = LDLM_FL_BLOCK_NOWAIT; - break; - case F_GETLK: -#ifdef F_GETLK64 - case F_GETLK64: -#endif - flags = LDLM_FL_TEST_LOCK; - break; - default: - CERROR("unknown fcntl lock command: %d\n", cmd); - return -EINVAL; - } - - /* - * Save the old mode so that if the mode in the lock changes we - * can decrement the appropriate reader or writer refcount. - */ - file_lock->fl_type = einfo.ei_mode; - - op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, 0, 0, - LUSTRE_OPC_ANY, NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - CDEBUG(D_DLMTRACE, "inode=" DFID ", pid=%u, flags=%#llx, mode=%u, start=%llu, end=%llu\n", - PFID(ll_inode2fid(inode)), flock.l_flock.pid, flags, - einfo.ei_mode, flock.l_flock.start, flock.l_flock.end); - - rc = md_enqueue(sbi->ll_md_exp, &einfo, &flock, NULL, op_data, &lockh, - flags); - - /* Restore the file lock type if not TEST lock. */ - if (!(flags & LDLM_FL_TEST_LOCK)) - file_lock->fl_type = fl_type; - - if ((rc == 0 || file_lock->fl_type == F_UNLCK) && - !(flags & LDLM_FL_TEST_LOCK)) - rc2 = locks_lock_file_wait(file, file_lock); - - if (rc2 && file_lock->fl_type != F_UNLCK) { - einfo.ei_mode = LCK_NL; - md_enqueue(sbi->ll_md_exp, &einfo, &flock, NULL, op_data, - &lockh, flags); - rc = rc2; - } - - ll_finish_md_op_data(op_data); - - return rc; -} - -int ll_get_fid_by_name(struct inode *parent, const char *name, - int namelen, struct lu_fid *fid, - struct inode **inode) -{ - struct md_op_data *op_data = NULL; - struct ptlrpc_request *req; - struct mdt_body *body; - int rc; - - op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen, 0, - LUSTRE_OPC_ANY, NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - op_data->op_valid = OBD_MD_FLID | OBD_MD_FLTYPE; - rc = md_getattr_name(ll_i2sbi(parent)->ll_md_exp, op_data, &req); - ll_finish_md_op_data(op_data); - if (rc < 0) - return rc; - - body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); - if (!body) { - rc = -EFAULT; - goto out_req; - } - if (fid) - *fid = body->mbo_fid1; - - if (inode) - rc = ll_prep_inode(inode, req, parent->i_sb, NULL); -out_req: - ptlrpc_req_finished(req); - return rc; -} - -int ll_migrate(struct inode *parent, struct file *file, int mdtidx, - const char *name, int namelen) -{ - struct ptlrpc_request *request = NULL; - struct obd_client_handle *och = NULL; - struct inode *child_inode = NULL; - struct dentry *dchild = NULL; - struct md_op_data *op_data; - struct mdt_body *body; - u64 data_version = 0; - struct qstr qstr; - int rc; - - CDEBUG(D_VFSTRACE, "migrate %s under " DFID " to MDT%d\n", - name, PFID(ll_inode2fid(parent)), mdtidx); - - op_data = ll_prep_md_op_data(NULL, parent, NULL, name, namelen, - 0, LUSTRE_OPC_ANY, NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - /* Get child FID first */ - qstr.hash = full_name_hash(parent, name, namelen); - qstr.name = name; - qstr.len = namelen; - dchild = d_lookup(file_dentry(file), &qstr); - if (dchild) { - op_data->op_fid3 = *ll_inode2fid(dchild->d_inode); - if (dchild->d_inode) - child_inode = igrab(dchild->d_inode); - dput(dchild); - } - - if (!child_inode) { - rc = ll_get_fid_by_name(parent, name, namelen, - &op_data->op_fid3, &child_inode); - if (rc) - goto out_free; - } - - if (!child_inode) { - rc = -EINVAL; - goto out_free; - } - - inode_lock(child_inode); - op_data->op_fid3 = *ll_inode2fid(child_inode); - if (!fid_is_sane(&op_data->op_fid3)) { - CERROR("%s: migrate %s, but fid " DFID " is insane\n", - ll_get_fsname(parent->i_sb, NULL, 0), name, - PFID(&op_data->op_fid3)); - rc = -EINVAL; - goto out_unlock; - } - - rc = ll_get_mdt_idx_by_fid(ll_i2sbi(parent), &op_data->op_fid3); - if (rc < 0) - goto out_unlock; - - if (rc == mdtidx) { - CDEBUG(D_INFO, "%s: " DFID " is already on MDT%d.\n", name, - PFID(&op_data->op_fid3), mdtidx); - rc = 0; - goto out_unlock; - } -again: - if (S_ISREG(child_inode->i_mode)) { - och = ll_lease_open(child_inode, NULL, FMODE_WRITE, 0); - if (IS_ERR(och)) { - rc = PTR_ERR(och); - och = NULL; - goto out_unlock; - } - - rc = ll_data_version(child_inode, &data_version, - LL_DV_WR_FLUSH); - if (rc) - goto out_close; - - op_data->op_handle = och->och_fh; - op_data->op_data = och->och_mod; - op_data->op_data_version = data_version; - op_data->op_lease_handle = och->och_lease_handle; - op_data->op_bias |= MDS_RENAME_MIGRATE; - } - - op_data->op_mds = mdtidx; - op_data->op_cli_flags = CLI_MIGRATE; - rc = md_rename(ll_i2sbi(parent)->ll_md_exp, op_data, name, - namelen, name, namelen, &request); - if (!rc) { - LASSERT(request); - ll_update_times(request, parent); - - body = req_capsule_server_get(&request->rq_pill, &RMF_MDT_BODY); - LASSERT(body); - - /* - * If the server does release layout lock, then we cleanup - * the client och here, otherwise release it in out_close: - */ - if (och && body->mbo_valid & OBD_MD_CLOSE_INTENT_EXECED) { - obd_mod_put(och->och_mod); - md_clear_open_replay_data(ll_i2sbi(parent)->ll_md_exp, - och); - och->och_fh.cookie = DEAD_HANDLE_MAGIC; - kfree(och); - och = NULL; - } - } - - if (request) { - ptlrpc_req_finished(request); - request = NULL; - } - - /* Try again if the file layout has changed. */ - if (rc == -EAGAIN && S_ISREG(child_inode->i_mode)) - goto again; - -out_close: - if (och) /* close the file */ - ll_lease_close(och, child_inode, NULL); - if (!rc) - clear_nlink(child_inode); -out_unlock: - inode_unlock(child_inode); - iput(child_inode); -out_free: - ll_finish_md_op_data(op_data); - return rc; -} - -static int -ll_file_noflock(struct file *file, int cmd, struct file_lock *file_lock) -{ - return -ENOSYS; -} - -/** - * test if some locks matching bits and l_req_mode are acquired - * - bits can be in different locks - * - if found clear the common lock bits in *bits - * - the bits not found, are kept in *bits - * \param inode [IN] - * \param bits [IN] searched lock bits [IN] - * \param l_req_mode [IN] searched lock mode - * \retval boolean, true iff all bits are found - */ -int ll_have_md_lock(struct inode *inode, __u64 *bits, - enum ldlm_mode l_req_mode) -{ - struct lustre_handle lockh; - union ldlm_policy_data policy; - enum ldlm_mode mode = (l_req_mode == LCK_MINMODE) ? - (LCK_CR | LCK_CW | LCK_PR | LCK_PW) : l_req_mode; - struct lu_fid *fid; - __u64 flags; - int i; - - if (!inode) - return 0; - - fid = &ll_i2info(inode)->lli_fid; - CDEBUG(D_INFO, "trying to match res " DFID " mode %s\n", PFID(fid), - ldlm_lockname[mode]); - - flags = LDLM_FL_BLOCK_GRANTED | LDLM_FL_CBPENDING | LDLM_FL_TEST_LOCK; - for (i = 0; i <= MDS_INODELOCK_MAXSHIFT && *bits != 0; i++) { - policy.l_inodebits.bits = *bits & (1 << i); - if (policy.l_inodebits.bits == 0) - continue; - - if (md_lock_match(ll_i2mdexp(inode), flags, fid, LDLM_IBITS, - &policy, mode, &lockh)) { - struct ldlm_lock *lock; - - lock = ldlm_handle2lock(&lockh); - if (lock) { - *bits &= - ~(lock->l_policy_data.l_inodebits.bits); - LDLM_LOCK_PUT(lock); - } else { - *bits &= ~policy.l_inodebits.bits; - } - } - } - return *bits == 0; -} - -enum ldlm_mode ll_take_md_lock(struct inode *inode, __u64 bits, - struct lustre_handle *lockh, __u64 flags, - enum ldlm_mode mode) -{ - union ldlm_policy_data policy = { .l_inodebits = { bits } }; - struct lu_fid *fid; - - fid = &ll_i2info(inode)->lli_fid; - CDEBUG(D_INFO, "trying to match res " DFID "\n", PFID(fid)); - - return md_lock_match(ll_i2mdexp(inode), flags | LDLM_FL_BLOCK_GRANTED, - fid, LDLM_IBITS, &policy, mode, lockh); -} - -static int ll_inode_revalidate_fini(struct inode *inode, int rc) -{ - /* Already unlinked. Just update nlink and return success */ - if (rc == -ENOENT) { - clear_nlink(inode); - /* If it is striped directory, and there is bad stripe - * Let's revalidate the dentry again, instead of returning - * error - */ - if (S_ISDIR(inode->i_mode) && ll_i2info(inode)->lli_lsm_md) - return 0; - - /* This path cannot be hit for regular files unless in - * case of obscure races, so no need to validate size. - */ - if (!S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode)) - return 0; - } else if (rc != 0) { - CDEBUG_LIMIT((rc == -EACCES || rc == -EIDRM) ? D_INFO : D_ERROR, - "%s: revalidate FID " DFID " error: rc = %d\n", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(ll_inode2fid(inode)), rc); - } - - return rc; -} - -static int __ll_inode_revalidate(struct dentry *dentry, __u64 ibits) -{ - struct inode *inode = d_inode(dentry); - struct ptlrpc_request *req = NULL; - struct obd_export *exp; - int rc = 0; - - CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p),name=%pd\n", - PFID(ll_inode2fid(inode)), inode, dentry); - - exp = ll_i2mdexp(inode); - - /* XXX: Enable OBD_CONNECT_ATTRFID to reduce unnecessary getattr RPC. - * But under CMD case, it caused some lock issues, should be fixed - * with new CMD ibits lock. See bug 12718 - */ - if (exp_connect_flags(exp) & OBD_CONNECT_ATTRFID) { - struct lookup_intent oit = { .it_op = IT_GETATTR }; - struct md_op_data *op_data; - - if (ibits == MDS_INODELOCK_LOOKUP) - oit.it_op = IT_LOOKUP; - - /* Call getattr by fid, so do not provide name at all. */ - op_data = ll_prep_md_op_data(NULL, inode, - inode, NULL, 0, 0, - LUSTRE_OPC_ANY, NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - rc = md_intent_lock(exp, op_data, &oit, &req, - &ll_md_blocking_ast, 0); - ll_finish_md_op_data(op_data); - if (rc < 0) { - rc = ll_inode_revalidate_fini(inode, rc); - goto out; - } - - rc = ll_revalidate_it_finish(req, &oit, inode); - if (rc != 0) { - ll_intent_release(&oit); - goto out; - } - - /* Unlinked? Unhash dentry, so it is not picked up later by - * do_lookup() -> ll_revalidate_it(). We cannot use d_drop - * here to preserve get_cwd functionality on 2.6. - * Bug 10503 - */ - if (!d_inode(dentry)->i_nlink) { - spin_lock(&inode->i_lock); - d_lustre_invalidate(dentry, 0); - spin_unlock(&inode->i_lock); - } - - ll_lookup_finish_locks(&oit, inode); - } else if (!ll_have_md_lock(d_inode(dentry), &ibits, LCK_MINMODE)) { - struct ll_sb_info *sbi = ll_i2sbi(d_inode(dentry)); - u64 valid = OBD_MD_FLGETATTR; - struct md_op_data *op_data; - int ealen = 0; - - if (S_ISREG(inode->i_mode)) { - rc = ll_get_default_mdsize(sbi, &ealen); - if (rc) - return rc; - valid |= OBD_MD_FLEASIZE | OBD_MD_FLMODEASIZE; - } - - op_data = ll_prep_md_op_data(NULL, inode, NULL, NULL, - 0, ealen, LUSTRE_OPC_ANY, - NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - op_data->op_valid = valid; - rc = md_getattr(sbi->ll_md_exp, op_data, &req); - ll_finish_md_op_data(op_data); - if (rc) - return ll_inode_revalidate_fini(inode, rc); - - rc = ll_prep_inode(&inode, req, NULL, NULL); - } -out: - ptlrpc_req_finished(req); - return rc; -} - -static int ll_merge_md_attr(struct inode *inode) -{ - struct cl_attr attr = { 0 }; - int rc; - - LASSERT(ll_i2info(inode)->lli_lsm_md); - rc = md_merge_attr(ll_i2mdexp(inode), ll_i2info(inode)->lli_lsm_md, - &attr, ll_md_blocking_ast); - if (rc) - return rc; - - set_nlink(inode, attr.cat_nlink); - inode->i_blocks = attr.cat_blocks; - i_size_write(inode, attr.cat_size); - - ll_i2info(inode)->lli_atime = attr.cat_atime; - ll_i2info(inode)->lli_mtime = attr.cat_mtime; - ll_i2info(inode)->lli_ctime = attr.cat_ctime; - - return 0; -} - -static int ll_inode_revalidate(struct dentry *dentry, __u64 ibits) -{ - struct inode *inode = d_inode(dentry); - int rc; - - rc = __ll_inode_revalidate(dentry, ibits); - if (rc != 0) - return rc; - - /* if object isn't regular file, don't validate size */ - if (!S_ISREG(inode->i_mode)) { - if (S_ISDIR(inode->i_mode) && - ll_i2info(inode)->lli_lsm_md) { - rc = ll_merge_md_attr(inode); - if (rc) - return rc; - } - - LTIME_S(inode->i_atime) = ll_i2info(inode)->lli_atime; - LTIME_S(inode->i_mtime) = ll_i2info(inode)->lli_mtime; - LTIME_S(inode->i_ctime) = ll_i2info(inode)->lli_ctime; - } else { - struct ll_inode_info *lli = ll_i2info(inode); - - /* In case of restore, the MDT has the right size and has - * already send it back without granting the layout lock, - * inode is up-to-date so glimpse is useless. - * Also to glimpse we need the layout, in case of a running - * restore the MDT holds the layout lock so the glimpse will - * block up to the end of restore (getattr will block) - */ - if (!test_bit(LLIF_FILE_RESTORING, &lli->lli_flags)) - rc = ll_glimpse_size(inode); - } - return rc; -} - -int ll_getattr(const struct path *path, struct kstat *stat, - u32 request_mask, unsigned int flags) -{ - struct inode *inode = d_inode(path->dentry); - struct ll_sb_info *sbi = ll_i2sbi(inode); - struct ll_inode_info *lli = ll_i2info(inode); - int res; - - res = ll_inode_revalidate(path->dentry, - MDS_INODELOCK_UPDATE | MDS_INODELOCK_LOOKUP); - ll_stats_ops_tally(sbi, LPROC_LL_GETATTR, 1); - - if (res) - return res; - - OBD_FAIL_TIMEOUT(OBD_FAIL_GETATTR_DELAY, 30); - - stat->dev = inode->i_sb->s_dev; - if (ll_need_32bit_api(sbi)) - stat->ino = cl_fid_build_ino(&lli->lli_fid, 1); - else - stat->ino = inode->i_ino; - stat->mode = inode->i_mode; - stat->uid = inode->i_uid; - stat->gid = inode->i_gid; - stat->rdev = inode->i_rdev; - stat->atime = inode->i_atime; - stat->mtime = inode->i_mtime; - stat->ctime = inode->i_ctime; - stat->blksize = 1 << inode->i_blkbits; - - stat->nlink = inode->i_nlink; - stat->size = i_size_read(inode); - stat->blocks = inode->i_blocks; - - return 0; -} - -static int ll_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, - __u64 start, __u64 len) -{ - int rc; - size_t num_bytes; - struct fiemap *fiemap; - unsigned int extent_count = fieinfo->fi_extents_max; - - num_bytes = sizeof(*fiemap) + (extent_count * - sizeof(struct fiemap_extent)); - fiemap = kvzalloc(num_bytes, GFP_KERNEL); - if (!fiemap) - return -ENOMEM; - - fiemap->fm_flags = fieinfo->fi_flags; - fiemap->fm_extent_count = fieinfo->fi_extents_max; - fiemap->fm_start = start; - fiemap->fm_length = len; - - if (extent_count > 0 && - copy_from_user(&fiemap->fm_extents[0], fieinfo->fi_extents_start, - sizeof(struct fiemap_extent))) { - rc = -EFAULT; - goto out; - } - - rc = ll_do_fiemap(inode, fiemap, num_bytes); - - fieinfo->fi_flags = fiemap->fm_flags; - fieinfo->fi_extents_mapped = fiemap->fm_mapped_extents; - if (extent_count > 0 && - copy_to_user(fieinfo->fi_extents_start, &fiemap->fm_extents[0], - fiemap->fm_mapped_extents * - sizeof(struct fiemap_extent))) { - rc = -EFAULT; - goto out; - } -out: - kvfree(fiemap); - return rc; -} - -struct posix_acl *ll_get_acl(struct inode *inode, int type) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct posix_acl *acl = NULL; - - spin_lock(&lli->lli_lock); - /* VFS' acl_permission_check->check_acl will release the refcount */ - acl = posix_acl_dup(lli->lli_posix_acl); - spin_unlock(&lli->lli_lock); - - return acl; -} - -int ll_inode_permission(struct inode *inode, int mask) -{ - struct ll_sb_info *sbi; - struct root_squash_info *squash; - const struct cred *old_cred = NULL; - struct cred *cred = NULL; - bool squash_id = false; - cfs_cap_t cap; - int rc = 0; - - if (mask & MAY_NOT_BLOCK) - return -ECHILD; - - /* as root inode are NOT getting validated in lookup operation, - * need to do it before permission check. - */ - - if (is_root_inode(inode)) { - rc = __ll_inode_revalidate(inode->i_sb->s_root, - MDS_INODELOCK_LOOKUP); - if (rc) - return rc; - } - - CDEBUG(D_VFSTRACE, "VFS Op:inode=" DFID "(%p), inode mode %x mask %o\n", - PFID(ll_inode2fid(inode)), inode, inode->i_mode, mask); - - /* squash fsuid/fsgid if needed */ - sbi = ll_i2sbi(inode); - squash = &sbi->ll_squash; - if (unlikely(squash->rsi_uid && - uid_eq(current_fsuid(), GLOBAL_ROOT_UID) && - !(sbi->ll_flags & LL_SBI_NOROOTSQUASH))) { - squash_id = true; - } - - if (squash_id) { - CDEBUG(D_OTHER, "squash creds (%d:%d)=>(%d:%d)\n", - __kuid_val(current_fsuid()), __kgid_val(current_fsgid()), - squash->rsi_uid, squash->rsi_gid); - - /* - * update current process's credentials - * and FS capability - */ - cred = prepare_creds(); - if (!cred) - return -ENOMEM; - - cred->fsuid = make_kuid(&init_user_ns, squash->rsi_uid); - cred->fsgid = make_kgid(&init_user_ns, squash->rsi_gid); - for (cap = 0; cap < sizeof(cfs_cap_t) * 8; cap++) { - if ((1 << cap) & CFS_CAP_FS_MASK) - cap_lower(cred->cap_effective, cap); - } - old_cred = override_creds(cred); - } - - ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1); - rc = generic_permission(inode, mask); - - /* restore current process's credentials and FS capability */ - if (squash_id) { - revert_creds(old_cred); - put_cred(cred); - } - - return rc; -} - -/* -o localflock - only provides locally consistent flock locks */ -const struct file_operations ll_file_operations = { - .read_iter = ll_file_read_iter, - .write_iter = ll_file_write_iter, - .unlocked_ioctl = ll_file_ioctl, - .open = ll_file_open, - .release = ll_file_release, - .mmap = ll_file_mmap, - .llseek = ll_file_seek, - .splice_read = generic_file_splice_read, - .fsync = ll_fsync, - .flush = ll_flush -}; - -const struct file_operations ll_file_operations_flock = { - .read_iter = ll_file_read_iter, - .write_iter = ll_file_write_iter, - .unlocked_ioctl = ll_file_ioctl, - .open = ll_file_open, - .release = ll_file_release, - .mmap = ll_file_mmap, - .llseek = ll_file_seek, - .splice_read = generic_file_splice_read, - .fsync = ll_fsync, - .flush = ll_flush, - .flock = ll_file_flock, - .lock = ll_file_flock -}; - -/* These are for -o noflock - to return ENOSYS on flock calls */ -const struct file_operations ll_file_operations_noflock = { - .read_iter = ll_file_read_iter, - .write_iter = ll_file_write_iter, - .unlocked_ioctl = ll_file_ioctl, - .open = ll_file_open, - .release = ll_file_release, - .mmap = ll_file_mmap, - .llseek = ll_file_seek, - .splice_read = generic_file_splice_read, - .fsync = ll_fsync, - .flush = ll_flush, - .flock = ll_file_noflock, - .lock = ll_file_noflock -}; - -const struct inode_operations ll_file_inode_operations = { - .setattr = ll_setattr, - .getattr = ll_getattr, - .permission = ll_inode_permission, - .listxattr = ll_listxattr, - .fiemap = ll_fiemap, - .get_acl = ll_get_acl, -}; - -/* dynamic ioctl number support routines */ -static struct llioc_ctl_data { - struct rw_semaphore ioc_sem; - struct list_head ioc_head; -} llioc = { - __RWSEM_INITIALIZER(llioc.ioc_sem), - LIST_HEAD_INIT(llioc.ioc_head) -}; - -struct llioc_data { - struct list_head iocd_list; - unsigned int iocd_size; - llioc_callback_t iocd_cb; - unsigned int iocd_count; - unsigned int iocd_cmd[0]; -}; - -void *ll_iocontrol_register(llioc_callback_t cb, int count, unsigned int *cmd) -{ - unsigned int size; - struct llioc_data *in_data = NULL; - - if (!cb || !cmd || count > LLIOC_MAX_CMD || count < 0) - return NULL; - - size = sizeof(*in_data) + count * sizeof(unsigned int); - in_data = kzalloc(size, GFP_NOFS); - if (!in_data) - return NULL; - - in_data->iocd_size = size; - in_data->iocd_cb = cb; - in_data->iocd_count = count; - memcpy(in_data->iocd_cmd, cmd, sizeof(unsigned int) * count); - - down_write(&llioc.ioc_sem); - list_add_tail(&in_data->iocd_list, &llioc.ioc_head); - up_write(&llioc.ioc_sem); - - return in_data; -} -EXPORT_SYMBOL(ll_iocontrol_register); - -void ll_iocontrol_unregister(void *magic) -{ - struct llioc_data *tmp; - - if (!magic) - return; - - down_write(&llioc.ioc_sem); - list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) { - if (tmp == magic) { - list_del(&tmp->iocd_list); - up_write(&llioc.ioc_sem); - - kfree(tmp); - return; - } - } - up_write(&llioc.ioc_sem); - - CWARN("didn't find iocontrol register block with magic: %p\n", magic); -} -EXPORT_SYMBOL(ll_iocontrol_unregister); - -static enum llioc_iter -ll_iocontrol_call(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg, int *rcp) -{ - enum llioc_iter ret = LLIOC_CONT; - struct llioc_data *data; - int rc = -EINVAL, i; - - down_read(&llioc.ioc_sem); - list_for_each_entry(data, &llioc.ioc_head, iocd_list) { - for (i = 0; i < data->iocd_count; i++) { - if (cmd != data->iocd_cmd[i]) - continue; - - ret = data->iocd_cb(inode, file, cmd, arg, data, &rc); - break; - } - - if (ret == LLIOC_STOP) - break; - } - up_read(&llioc.ioc_sem); - - if (rcp) - *rcp = rc; - return ret; -} - -int ll_layout_conf(struct inode *inode, const struct cl_object_conf *conf) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct cl_object *obj = lli->lli_clob; - struct lu_env *env; - int rc; - u16 refcheck; - - if (!obj) - return 0; - - env = cl_env_get(&refcheck); - if (IS_ERR(env)) - return PTR_ERR(env); - - rc = cl_conf_set(env, obj, conf); - if (rc < 0) - goto out; - - if (conf->coc_opc == OBJECT_CONF_SET) { - struct ldlm_lock *lock = conf->coc_lock; - struct cl_layout cl = { - .cl_layout_gen = 0, - }; - - LASSERT(lock); - LASSERT(ldlm_has_layout(lock)); - - /* it can only be allowed to match after layout is - * applied to inode otherwise false layout would be - * seen. Applying layout should happen before dropping - * the intent lock. - */ - ldlm_lock_allow_match(lock); - - rc = cl_object_layout_get(env, obj, &cl); - if (rc < 0) - goto out; - - CDEBUG(D_VFSTRACE, DFID ": layout version change: %u -> %u\n", - PFID(&lli->lli_fid), ll_layout_version_get(lli), - cl.cl_layout_gen); - ll_layout_version_set(lli, cl.cl_layout_gen); - } -out: - cl_env_put(env, &refcheck); - return rc; -} - -/* Fetch layout from MDT with getxattr request, if it's not ready yet */ -static int ll_layout_fetch(struct inode *inode, struct ldlm_lock *lock) - -{ - struct ll_sb_info *sbi = ll_i2sbi(inode); - struct ptlrpc_request *req; - struct mdt_body *body; - void *lvbdata; - void *lmm; - int lmmsize; - int rc; - - CDEBUG(D_INODE, DFID " LVB_READY=%d l_lvb_data=%p l_lvb_len=%d\n", - PFID(ll_inode2fid(inode)), ldlm_is_lvb_ready(lock), - lock->l_lvb_data, lock->l_lvb_len); - - if (lock->l_lvb_data && ldlm_is_lvb_ready(lock)) - return 0; - - /* if layout lock was granted right away, the layout is returned - * within DLM_LVB of dlm reply; otherwise if the lock was ever - * blocked and then granted via completion ast, we have to fetch - * layout here. Please note that we can't use the LVB buffer in - * completion AST because it doesn't have a large enough buffer - */ - rc = ll_get_default_mdsize(sbi, &lmmsize); - if (rc == 0) - rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), - OBD_MD_FLXATTR, XATTR_NAME_LOV, NULL, 0, - lmmsize, 0, &req); - if (rc < 0) - return rc; - - body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); - if (!body) { - rc = -EPROTO; - goto out; - } - - lmmsize = body->mbo_eadatasize; - if (lmmsize == 0) /* empty layout */ { - rc = 0; - goto out; - } - - lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA, lmmsize); - if (!lmm) { - rc = -EFAULT; - goto out; - } - - lvbdata = kvzalloc(lmmsize, GFP_NOFS); - if (!lvbdata) { - rc = -ENOMEM; - goto out; - } - - memcpy(lvbdata, lmm, lmmsize); - lock_res_and_lock(lock); - if (lock->l_lvb_data) - kvfree(lock->l_lvb_data); - - lock->l_lvb_data = lvbdata; - lock->l_lvb_len = lmmsize; - unlock_res_and_lock(lock); - -out: - ptlrpc_req_finished(req); - return rc; -} - -/** - * Apply the layout to the inode. Layout lock is held and will be released - * in this function. - */ -static int ll_layout_lock_set(struct lustre_handle *lockh, enum ldlm_mode mode, - struct inode *inode) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct ll_sb_info *sbi = ll_i2sbi(inode); - struct ldlm_lock *lock; - struct cl_object_conf conf; - int rc = 0; - bool lvb_ready; - bool wait_layout = false; - - LASSERT(lustre_handle_is_used(lockh)); - - lock = ldlm_handle2lock(lockh); - LASSERT(lock); - LASSERT(ldlm_has_layout(lock)); - - LDLM_DEBUG(lock, "File " DFID "(%p) being reconfigured", - PFID(&lli->lli_fid), inode); - - /* in case this is a caching lock and reinstate with new inode */ - md_set_lock_data(sbi->ll_md_exp, lockh, inode, NULL); - - lock_res_and_lock(lock); - lvb_ready = ldlm_is_lvb_ready(lock); - unlock_res_and_lock(lock); - /* checking lvb_ready is racy but this is okay. The worst case is - * that multi processes may configure the file on the same time. - */ - if (lvb_ready) { - rc = 0; - goto out; - } - - rc = ll_layout_fetch(inode, lock); - if (rc < 0) - goto out; - - /* for layout lock, lmm is returned in lock's lvb. - * lvb_data is immutable if the lock is held so it's safe to access it - * without res lock. - * - * set layout to file. Unlikely this will fail as old layout was - * surely eliminated - */ - memset(&conf, 0, sizeof(conf)); - conf.coc_opc = OBJECT_CONF_SET; - conf.coc_inode = inode; - conf.coc_lock = lock; - conf.u.coc_layout.lb_buf = lock->l_lvb_data; - conf.u.coc_layout.lb_len = lock->l_lvb_len; - rc = ll_layout_conf(inode, &conf); - - /* refresh layout failed, need to wait */ - wait_layout = rc == -EBUSY; - -out: - LDLM_LOCK_PUT(lock); - ldlm_lock_decref(lockh, mode); - - /* wait for IO to complete if it's still being used. */ - if (wait_layout) { - CDEBUG(D_INODE, "%s: " DFID "(%p) wait for layout reconf\n", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(&lli->lli_fid), inode); - - memset(&conf, 0, sizeof(conf)); - conf.coc_opc = OBJECT_CONF_WAIT; - conf.coc_inode = inode; - rc = ll_layout_conf(inode, &conf); - if (rc == 0) - rc = -EAGAIN; - - CDEBUG(D_INODE, - "%s: file=" DFID " waiting layout return: %d.\n", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(&lli->lli_fid), rc); - } - return rc; -} - -static int ll_layout_refresh_locked(struct inode *inode) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct ll_sb_info *sbi = ll_i2sbi(inode); - struct md_op_data *op_data; - struct lookup_intent it; - struct lustre_handle lockh; - enum ldlm_mode mode; - struct ldlm_enqueue_info einfo = { - .ei_type = LDLM_IBITS, - .ei_mode = LCK_CR, - .ei_cb_bl = &ll_md_blocking_ast, - .ei_cb_cp = &ldlm_completion_ast, - }; - int rc; - -again: - /* mostly layout lock is caching on the local side, so try to match - * it before grabbing layout lock mutex. - */ - mode = ll_take_md_lock(inode, MDS_INODELOCK_LAYOUT, &lockh, 0, - LCK_CR | LCK_CW | LCK_PR | LCK_PW); - if (mode != 0) { /* hit cached lock */ - rc = ll_layout_lock_set(&lockh, mode, inode); - if (rc == -EAGAIN) - goto again; - return rc; - } - - op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, - 0, 0, LUSTRE_OPC_ANY, NULL); - if (IS_ERR(op_data)) - return PTR_ERR(op_data); - - /* have to enqueue one */ - memset(&it, 0, sizeof(it)); - it.it_op = IT_LAYOUT; - lockh.cookie = 0ULL; - - LDLM_DEBUG_NOLOCK("%s: requeue layout lock for file " DFID "(%p)", - ll_get_fsname(inode->i_sb, NULL, 0), - PFID(&lli->lli_fid), inode); - - rc = md_enqueue(sbi->ll_md_exp, &einfo, NULL, &it, op_data, &lockh, 0); - ptlrpc_req_finished(it.it_request); - it.it_request = NULL; - - ll_finish_md_op_data(op_data); - - mode = it.it_lock_mode; - it.it_lock_mode = 0; - ll_intent_drop_lock(&it); - - if (rc == 0) { - /* set lock data in case this is a new lock */ - ll_set_lock_data(sbi->ll_md_exp, inode, &it, NULL); - rc = ll_layout_lock_set(&lockh, mode, inode); - if (rc == -EAGAIN) - goto again; - } - - return rc; -} - -/** - * This function checks if there exists a LAYOUT lock on the client side, - * or enqueues it if it doesn't have one in cache. - * - * This function will not hold layout lock so it may be revoked any time after - * this function returns. Any operations depend on layout should be redone - * in that case. - * - * This function should be called before lov_io_init() to get an uptodate - * layout version, the caller should save the version number and after IO - * is finished, this function should be called again to verify that layout - * is not changed during IO time. - */ -int ll_layout_refresh(struct inode *inode, __u32 *gen) -{ - struct ll_inode_info *lli = ll_i2info(inode); - struct ll_sb_info *sbi = ll_i2sbi(inode); - int rc; - - *gen = ll_layout_version_get(lli); - if (!(sbi->ll_flags & LL_SBI_LAYOUT_LOCK) || *gen != CL_LAYOUT_GEN_NONE) - return 0; - - /* sanity checks */ - LASSERT(fid_is_sane(ll_inode2fid(inode))); - LASSERT(S_ISREG(inode->i_mode)); - - /* take layout lock mutex to enqueue layout lock exclusively. */ - mutex_lock(&lli->lli_layout_mutex); - - rc = ll_layout_refresh_locked(inode); - if (rc < 0) - goto out; - - *gen = ll_layout_version_get(lli); -out: - mutex_unlock(&lli->lli_layout_mutex); - - return rc; -} - -/** - * This function send a restore request to the MDT - */ -int ll_layout_restore(struct inode *inode, loff_t offset, __u64 length) -{ - struct hsm_user_request *hur; - int len, rc; - - len = sizeof(struct hsm_user_request) + - sizeof(struct hsm_user_item); - hur = kzalloc(len, GFP_NOFS); - if (!hur) - return -ENOMEM; - - hur->hur_request.hr_action = HUA_RESTORE; - hur->hur_request.hr_archive_id = 0; - hur->hur_request.hr_flags = 0; - memcpy(&hur->hur_user_item[0].hui_fid, &ll_i2info(inode)->lli_fid, - sizeof(hur->hur_user_item[0].hui_fid)); - hur->hur_user_item[0].hui_extent.offset = offset; - hur->hur_user_item[0].hui_extent.length = length; - hur->hur_request.hr_itemcount = 1; - rc = obd_iocontrol(LL_IOC_HSM_REQUEST, ll_i2sbi(inode)->ll_md_exp, - len, hur, NULL); - kfree(hur); - return rc; -} |