| /* |
| * 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.sun.com/software/products/lustre/docs/GPLv2.pdf |
| * |
| * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| * |
| * GPL HEADER END |
| */ |
| /* |
| * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Use is subject to license terms. |
| * |
| * Copyright (c) 2011, 2012, 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 "../include/lustre_dlm.h" |
| #include "../include/lustre_lite.h" |
| #include <linux/pagemap.h> |
| #include <linux/file.h> |
| #include "llite_internal.h" |
| #include "../include/lustre/ll_fiemap.h" |
| |
| #include "../include/cl_object.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; |
| |
| OBD_SLAB_ALLOC_PTR_GFP(fd, ll_file_data_slab, GFP_NOFS); |
| if (fd == NULL) |
| return NULL; |
| fd->fd_write_failed = false; |
| return fd; |
| } |
| |
| static void ll_file_data_put(struct ll_file_data *fd) |
| { |
| if (fd != NULL) |
| OBD_SLAB_FREE_PTR(fd, ll_file_data_slab); |
| } |
| |
| void ll_pack_inode2opdata(struct inode *inode, struct md_op_data *op_data, |
| struct lustre_handle *fh) |
| { |
| op_data->op_fid1 = ll_i2info(inode)->lli_fid; |
| 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_blocks = inode->i_blocks; |
| ((struct ll_iattr *)&op_data->op_attr)->ia_attr_flags = |
| ll_inode_to_ext_flags(inode->i_flags); |
| op_data->op_ioepoch = ll_i2info(inode)->lli_ioepoch; |
| if (fh) |
| op_data->op_handle = *fh; |
| op_data->op_capa1 = ll_mdscapa_get(inode); |
| |
| if (LLIF_DATA_MODIFIED & ll_i2info(inode)->lli_flags) |
| op_data->op_bias |= MDS_DATA_MODIFIED; |
| } |
| |
| /** |
| * Closes the IO epoch and 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) |
| { |
| op_data->op_attr.ia_valid = ATTR_MODE | ATTR_ATIME | ATTR_ATIME_SET | |
| ATTR_MTIME | ATTR_MTIME_SET | |
| ATTR_CTIME | ATTR_CTIME_SET; |
| |
| if (!(och->och_flags & FMODE_WRITE)) |
| goto out; |
| |
| if (!exp_connect_som(ll_i2mdexp(inode)) || !S_ISREG(inode->i_mode)) |
| op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS; |
| else |
| ll_ioepoch_close(inode, op_data, &och, 0); |
| |
| out: |
| ll_pack_inode2opdata(inode, op_data, &och->och_fh); |
| ll_prep_md_op_data(op_data, inode, NULL, NULL, |
| 0, 0, LUSTRE_OPC_ANY, NULL); |
| } |
| |
| static int ll_close_inode_openhandle(struct obd_export *md_exp, |
| struct inode *inode, |
| struct obd_client_handle *och, |
| const __u64 *data_version) |
| { |
| struct obd_export *exp = ll_i2mdexp(inode); |
| struct md_op_data *op_data; |
| struct ptlrpc_request *req = NULL; |
| struct obd_device *obd = class_exp2obd(exp); |
| int epoch_close = 1; |
| int rc; |
| |
| if (obd == NULL) { |
| /* |
| * XXX: in case of LMV, is this correct to access |
| * ->exp_handle? |
| */ |
| CERROR("Invalid MDC connection handle %#llx\n", |
| ll_i2mdexp(inode)->exp_handle.h_cookie); |
| rc = 0; |
| goto out; |
| } |
| |
| op_data = kzalloc(sizeof(*op_data), GFP_NOFS); |
| if (!op_data) { |
| /* XXX We leak openhandle and request here. */ |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| ll_prepare_close(inode, op_data, och); |
| if (data_version != NULL) { |
| /* Pass in data_version implies release. */ |
| op_data->op_bias |= MDS_HSM_RELEASE; |
| op_data->op_data_version = *data_version; |
| op_data->op_lease_handle = och->och_lease_handle; |
| op_data->op_attr.ia_valid |= ATTR_SIZE | ATTR_BLOCKS; |
| } |
| epoch_close = (op_data->op_flags & MF_EPOCH_CLOSE); |
| rc = md_close(md_exp, op_data, och->och_mod, &req); |
| if (rc == -EAGAIN) { |
| /* This close must have the epoch closed. */ |
| LASSERT(epoch_close); |
| /* MDS has instructed us to obtain Size-on-MDS attribute from |
| * OSTs and send setattr to back to MDS. */ |
| rc = ll_som_update(inode, op_data); |
| if (rc) { |
| CERROR("inode %lu mdc Size-on-MDS update failed: rc = %d\n", |
| inode->i_ino, rc); |
| rc = 0; |
| } |
| } else if (rc) { |
| CERROR("inode %lu mdc close failed: rc = %d\n", |
| inode->i_ino, rc); |
| } |
| |
| /* DATA_MODIFIED flag was successfully sent on close, cancel data |
| * modification flag. */ |
| if (rc == 0 && (op_data->op_bias & MDS_DATA_MODIFIED)) { |
| struct ll_inode_info *lli = ll_i2info(inode); |
| |
| spin_lock(&lli->lli_lock); |
| lli->lli_flags &= ~LLIF_DATA_MODIFIED; |
| spin_unlock(&lli->lli_lock); |
| } |
| |
| if (rc == 0) { |
| rc = ll_objects_destroy(req, inode); |
| if (rc) |
| CERROR("inode %lu ll_objects destroy: rc = %d\n", |
| inode->i_ino, rc); |
| } |
| if (rc == 0 && op_data->op_bias & MDS_HSM_RELEASE) { |
| struct mdt_body *body; |
| body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); |
| if (!(body->valid & OBD_MD_FLRELEASED)) |
| rc = -EBUSY; |
| } |
| |
| ll_finish_md_op_data(op_data); |
| |
| out: |
| if (exp_connect_som(exp) && !epoch_close && |
| S_ISREG(inode->i_mode) && (och->och_flags & FMODE_WRITE)) { |
| ll_queue_done_writing(inode, LLIF_DONE_WRITING); |
| } else { |
| md_clear_open_replay_data(md_exp, och); |
| /* Free @och if it is not waiting for DONE_WRITING. */ |
| och->och_fh.cookie = DEAD_HANDLE_MAGIC; |
| OBD_FREE_PTR(och); |
| } |
| if (req) /* This is close request */ |
| 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 != NULL) { |
| /* There might be a race and this handle may already |
| be closed. */ |
| rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp, |
| inode, och, NULL); |
| } |
| |
| return rc; |
| } |
| |
| static int ll_md_close(struct obd_export *md_exp, 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; |
| ldlm_policy_data_t 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.cg_gid); |
| |
| if (fd->fd_lease_och != NULL) { |
| bool lease_broken; |
| |
| /* Usually the lease is not released when the |
| * application crashed, we need to release here. */ |
| rc = ll_lease_close(fd->fd_lease_och, inode, &lease_broken); |
| CDEBUG(rc ? D_ERROR : D_INODE, "Clean up lease "DFID" %d/%d\n", |
| PFID(&lli->lli_fid), rc, lease_broken); |
| |
| fd->fd_lease_och = NULL; |
| } |
| |
| if (fd->fd_och != NULL) { |
| rc = ll_close_inode_openhandle(md_exp, inode, fd->fd_och, 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(md_exp, 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); |
| ll_capa_close(inode); |
| |
| 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=%lu/%u(%p)\n", inode->i_ino, |
| inode->i_generation, inode); |
| |
| #ifdef CONFIG_FS_POSIX_ACL |
| if (sbi->ll_flags & LL_SBI_RMT_CLIENT && is_root_inode(inode)) { |
| struct ll_file_data *fd = LUSTRE_FPRIVATE(file); |
| |
| LASSERT(fd != NULL); |
| if (unlikely(fd->fd_flags & LL_FILE_RMTACL)) { |
| fd->fd_flags &= ~LL_FILE_RMTACL; |
| rct_del(&sbi->ll_rct, current_pid()); |
| et_search_free(&sbi->ll_et, current_pid()); |
| } |
| } |
| #endif |
| |
| if (!is_root_inode(inode)) |
| ll_stats_ops_tally(sbi, LPROC_LL_RELEASE, 1); |
| fd = LUSTRE_FPRIVATE(file); |
| LASSERT(fd != NULL); |
| |
| /* The last ref on @file, maybe not the owner pid of statahead. |
| * Different processes can open the same dir, "ll_opendir_key" means: |
| * it is me that should stop the statahead thread. */ |
| if (S_ISDIR(inode->i_mode) && lli->lli_opendir_key == fd && |
| lli->lli_opendir_pid != 0) |
| ll_stop_statahead(inode, lli->lli_opendir_key); |
| |
| if (is_root_inode(inode)) { |
| LUSTRE_FPRIVATE(file) = NULL; |
| ll_file_data_put(fd); |
| return 0; |
| } |
| |
| if (!S_ISDIR(inode->i_mode)) { |
| lov_read_and_clear_async_rc(lli->lli_clob); |
| lli->lli_async_rc = 0; |
| } |
| |
| rc = ll_md_close(sbi->ll_md_exp, 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 *dentry, void *lmm, |
| int lmmsize, struct lookup_intent *itp) |
| { |
| struct inode *inode = dentry->d_inode; |
| struct ll_sb_info *sbi = ll_i2sbi(inode); |
| struct dentry *parent = dentry->d_parent; |
| const char *name = dentry->d_name.name; |
| const int len = dentry->d_name.len; |
| struct md_op_data *op_data; |
| struct ptlrpc_request *req; |
| __u32 opc = LUSTRE_OPC_ANY; |
| int rc; |
| |
| /* Usually we come here only for NFSD, and we want open lock. |
| But we can also get here with pre 2.6.15 patchless kernels, and in |
| that case that lock is also ok */ |
| /* We can also get here if there was cached open handle in revalidate_it |
| * but it disappeared while we were getting from there to ll_file_open. |
| * But this means this file was closed and immediately opened which |
| * makes a good candidate for using OPEN lock */ |
| /* If lmmsize & lmm are not 0, we are just setting stripe info |
| * parameters. No need for the open lock */ |
| if (lmm == NULL && lmmsize == 0) { |
| itp->it_flags |= MDS_OPEN_LOCK; |
| if (itp->it_flags & FMODE_WRITE) |
| opc = LUSTRE_OPC_CREATE; |
| } |
| |
| op_data = ll_prep_md_op_data(NULL, parent->d_inode, |
| inode, name, len, |
| O_RDWR, opc, NULL); |
| if (IS_ERR(op_data)) |
| return PTR_ERR(op_data); |
| |
| itp->it_flags |= MDS_OPEN_BY_FID; |
| rc = md_intent_lock(sbi->ll_md_exp, op_data, lmm, lmmsize, itp, |
| 0 /*unused */, &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->d.lustre.it_lock_mode) |
| ll_set_lock_data(sbi->ll_md_exp, inode, itp, NULL); |
| |
| out: |
| ptlrpc_req_finished(req); |
| ll_intent_drop_lock(itp); |
| |
| return rc; |
| } |
| |
| /** |
| * Assign an obtained @ioepoch to client's inode. No lock is needed, MDS does |
| * not believe attributes if a few ioepoch holders exist. Attributes for |
| * previous ioepoch if new one is opened are also skipped by MDS. |
| */ |
| void ll_ioepoch_open(struct ll_inode_info *lli, __u64 ioepoch) |
| { |
| if (ioepoch && lli->lli_ioepoch != ioepoch) { |
| lli->lli_ioepoch = ioepoch; |
| CDEBUG(D_INODE, "Epoch %llu opened on "DFID"\n", |
| ioepoch, PFID(&lli->lli_fid)); |
| } |
| } |
| |
| static int ll_och_fill(struct obd_export *md_exp, struct lookup_intent *it, |
| struct obd_client_handle *och) |
| { |
| struct ptlrpc_request *req = it->d.lustre.it_data; |
| struct mdt_body *body; |
| |
| body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); |
| och->och_fh = body->handle; |
| och->och_fid = body->fid1; |
| och->och_lease_handle.cookie = it->d.lustre.it_lock_handle; |
| och->och_magic = OBD_CLIENT_HANDLE_MAGIC; |
| och->och_flags = it->it_flags; |
| |
| 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); |
| struct ll_inode_info *lli = ll_i2info(inode); |
| |
| LASSERT(!LUSTRE_FPRIVATE(file)); |
| |
| LASSERT(fd != NULL); |
| |
| if (och) { |
| struct ptlrpc_request *req = it->d.lustre.it_data; |
| struct mdt_body *body; |
| int rc; |
| |
| rc = ll_och_fill(ll_i2sbi(inode)->ll_md_exp, it, och); |
| if (rc != 0) |
| return rc; |
| |
| body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); |
| ll_ioepoch_open(lli, body->ioepoch); |
| } |
| |
| LUSTRE_FPRIVATE(file) = fd; |
| ll_readahead_init(inode, &fd->fd_ras); |
| fd->fd_omode = it->it_flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC); |
| 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, opendir_set = 0; |
| |
| CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), flags %o\n", inode->i_ino, |
| inode->i_generation, 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 == NULL) { |
| rc = -ENOMEM; |
| goto out_openerr; |
| } |
| |
| fd->fd_file = file; |
| if (S_ISDIR(inode->i_mode)) { |
| spin_lock(&lli->lli_sa_lock); |
| if (lli->lli_opendir_key == NULL && lli->lli_sai == NULL && |
| lli->lli_opendir_pid == 0) { |
| lli->lli_opendir_key = fd; |
| lli->lli_opendir_pid = current_pid(); |
| opendir_set = 1; |
| } |
| spin_unlock(&lli->lli_sa_lock); |
| } |
| |
| if (is_root_inode(inode)) { |
| LUSTRE_FPRIVATE(file) = fd; |
| return 0; |
| } |
| |
| if (!it || !it->d.lustre.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->d.lustre.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); |
| it->it_create_mode |= M_CHECK_STALE; |
| rc = ll_intent_file_open(file->f_path.dentry, NULL, 0, it); |
| it->it_create_mode &= ~M_CHECK_STALE; |
| 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; |
| |
| LASSERT(it_disposition(it, DISP_ENQ_OPEN_REF)); |
| |
| 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; |
| |
| ll_capa_open(inode); |
| |
| if (!lli->lli_has_smd && |
| (cl_is_lov_delay_create(file->f_flags) || |
| (file->f_mode & FMODE_WRITE) == 0)) { |
| CDEBUG(D_INODE, "object creation was delayed\n"); |
| 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) { |
| OBD_FREE(*och_p, sizeof (struct obd_client_handle)); |
| *och_p = NULL; /* OBD_FREE writes some magic there */ |
| (*och_usecount)--; |
| } |
| mutex_unlock(&lli->lli_och_mutex); |
| |
| out_openerr: |
| if (opendir_set != 0) |
| ll_stop_statahead(inode, lli->lli_opendir_key); |
| if (fd != NULL) |
| 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->d.lustre.it_data); |
| 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; |
| struct lustre_handle old_handle = { 0 }; |
| struct obd_client_handle *och = NULL; |
| int rc; |
| int rc2; |
| |
| if (fmode != FMODE_WRITE && fmode != FMODE_READ) |
| return ERR_PTR(-EINVAL); |
| |
| if (file != NULL) { |
| struct ll_inode_info *lli = ll_i2info(inode); |
| struct ll_file_data *fd = LUSTRE_FPRIVATE(file); |
| struct obd_client_handle **och_p; |
| __u64 *och_usecount; |
| |
| if (!(fmode & file->f_mode) || (file->f_mode & FMODE_EXEC)) |
| return ERR_PTR(-EPERM); |
| |
| /* Get the openhandle of the file */ |
| rc = -EBUSY; |
| mutex_lock(&lli->lli_och_mutex); |
| if (fd->fd_lease_och != NULL) { |
| mutex_unlock(&lli->lli_och_mutex); |
| return ERR_PTR(rc); |
| } |
| |
| if (fd->fd_och == NULL) { |
| if (file->f_mode & FMODE_WRITE) { |
| LASSERT(lli->lli_mds_write_och != NULL); |
| och_p = &lli->lli_mds_write_och; |
| och_usecount = &lli->lli_open_fd_write_count; |
| } else { |
| LASSERT(lli->lli_mds_read_och != NULL); |
| och_p = &lli->lli_mds_read_och; |
| och_usecount = &lli->lli_open_fd_read_count; |
| } |
| if (*och_usecount == 1) { |
| fd->fd_och = *och_p; |
| *och_p = NULL; |
| *och_usecount = 0; |
| rc = 0; |
| } |
| } |
| mutex_unlock(&lli->lli_och_mutex); |
| if (rc < 0) /* more than 1 opener */ |
| return ERR_PTR(rc); |
| |
| LASSERT(fd->fd_och != NULL); |
| old_handle = fd->fd_och->och_fh; |
| } |
| |
| 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, NULL, 0, &it, 0, &req, |
| ll_md_blocking_lease_ast, |
| /* LDLM_FL_NO_LRU: To not put the lease lock into LRU list, otherwise |
| * it can be cancelled which may mislead applications that the lease is |
| * broken; |
| * LDLM_FL_EXCL: Set this flag so that it won't be matched by normal |
| * open in ll_md_blocking_ast(). Otherwise as ll_md_blocking_lease_ast |
| * doesn't deal with openhandle, so normal openhandle will be leaked. */ |
| LDLM_FL_NO_LRU | LDLM_FL_EXCL); |
| ll_finish_md_op_data(op_data); |
| 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.d.lustre.it_lock_mode == 0 || |
| it.d.lustre.it_lock_bits != MDS_INODELOCK_OPEN) { |
| /* open lock must return for lease */ |
| CERROR(DFID "lease granted but no open lock, %d/%llu.\n", |
| PFID(ll_inode2fid(inode)), it.d.lustre.it_lock_mode, |
| it.d.lustre.it_lock_bits); |
| rc = -EPROTO; |
| goto out_close; |
| } |
| |
| ll_intent_release(&it); |
| return och; |
| |
| out_close: |
| rc2 = ll_close_inode_openhandle(sbi->ll_md_exp, inode, och, NULL); |
| if (rc2) |
| CERROR("Close openhandle returned %d\n", rc2); |
| |
| /* cancel open lock */ |
| if (it.d.lustre.it_lock_mode != 0) { |
| ldlm_lock_decref_and_cancel(&och->och_lease_handle, |
| it.d.lustre.it_lock_mode); |
| it.d.lustre.it_lock_mode = 0; |
| } |
| out_release_it: |
| ll_intent_release(&it); |
| out: |
| OBD_FREE_PTR(och); |
| return ERR_PTR(rc); |
| } |
| |
| /** |
| * 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; |
| int rc; |
| |
| lock = ldlm_handle2lock(&och->och_lease_handle); |
| if (lock != NULL) { |
| lock_res_and_lock(lock); |
| cancelled = ldlm_is_cancel(lock); |
| unlock_res_and_lock(lock); |
| ldlm_lock_put(lock); |
| } |
| |
| CDEBUG(D_INODE, "lease for "DFID" broken? %d\n", |
| PFID(&ll_i2info(inode)->lli_fid), cancelled); |
| |
| if (!cancelled) |
| ldlm_cli_cancel(&och->och_lease_handle, 0); |
| if (lease_broken != NULL) |
| *lease_broken = cancelled; |
| |
| rc = ll_close_inode_openhandle(ll_i2sbi(inode)->ll_md_exp, inode, och, |
| NULL); |
| return rc; |
| } |
| |
| /* Fills the obdo with the attributes for the lsm */ |
| static int ll_lsm_getattr(struct lov_stripe_md *lsm, struct obd_export *exp, |
| struct obd_capa *capa, struct obdo *obdo, |
| __u64 ioepoch, int sync) |
| { |
| struct ptlrpc_request_set *set; |
| struct obd_info oinfo = { { { 0 } } }; |
| int rc; |
| |
| LASSERT(lsm != NULL); |
| |
| oinfo.oi_md = lsm; |
| oinfo.oi_oa = obdo; |
| oinfo.oi_oa->o_oi = lsm->lsm_oi; |
| oinfo.oi_oa->o_mode = S_IFREG; |
| oinfo.oi_oa->o_ioepoch = ioepoch; |
| oinfo.oi_oa->o_valid = OBD_MD_FLID | OBD_MD_FLTYPE | |
| OBD_MD_FLSIZE | OBD_MD_FLBLOCKS | |
| OBD_MD_FLBLKSZ | OBD_MD_FLATIME | |
| OBD_MD_FLMTIME | OBD_MD_FLCTIME | |
| OBD_MD_FLGROUP | OBD_MD_FLEPOCH | |
| OBD_MD_FLDATAVERSION; |
| oinfo.oi_capa = capa; |
| if (sync) { |
| oinfo.oi_oa->o_valid |= OBD_MD_FLFLAGS; |
| oinfo.oi_oa->o_flags |= OBD_FL_SRVLOCK; |
| } |
| |
| set = ptlrpc_prep_set(); |
| if (set == NULL) { |
| CERROR("can't allocate ptlrpc set\n"); |
| rc = -ENOMEM; |
| } else { |
| rc = obd_getattr_async(exp, &oinfo, set); |
| if (rc == 0) |
| rc = ptlrpc_set_wait(set); |
| ptlrpc_set_destroy(set); |
| } |
| if (rc == 0) |
| oinfo.oi_oa->o_valid &= (OBD_MD_FLBLOCKS | OBD_MD_FLBLKSZ | |
| OBD_MD_FLATIME | OBD_MD_FLMTIME | |
| OBD_MD_FLCTIME | OBD_MD_FLSIZE | |
| OBD_MD_FLDATAVERSION); |
| return rc; |
| } |
| |
| /** |
| * Performs the getattr on the inode and updates its fields. |
| * If @sync != 0, perform the getattr under the server-side lock. |
| */ |
| int ll_inode_getattr(struct inode *inode, struct obdo *obdo, |
| __u64 ioepoch, int sync) |
| { |
| struct obd_capa *capa = ll_mdscapa_get(inode); |
| struct lov_stripe_md *lsm; |
| int rc; |
| |
| lsm = ccc_inode_lsm_get(inode); |
| rc = ll_lsm_getattr(lsm, ll_i2dtexp(inode), |
| capa, obdo, ioepoch, sync); |
| capa_put(capa); |
| if (rc == 0) { |
| struct ost_id *oi = lsm ? &lsm->lsm_oi : &obdo->o_oi; |
| |
| obdo_refresh_inode(inode, obdo, obdo->o_valid); |
| CDEBUG(D_INODE, "objid " DOSTID " size %llu, blocks %llu, blksize %lu\n", |
| POSTID(oi), i_size_read(inode), |
| (unsigned long long)inode->i_blocks, |
| 1UL << inode->i_blkbits); |
| } |
| ccc_inode_lsm_put(inode, lsm); |
| return rc; |
| } |
| |
| int ll_merge_lvb(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 = ccc_env_thread_attr(env); |
| struct ost_lvb lvb; |
| 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_lvb.lvb_atime; |
| LTIME_S(inode->i_mtime) = lli->lli_lvb.lvb_mtime; |
| LTIME_S(inode->i_ctime) = lli->lli_lvb.lvb_ctime; |
| |
| lvb.lvb_size = i_size_read(inode); |
| lvb.lvb_blocks = inode->i_blocks; |
| lvb.lvb_mtime = LTIME_S(inode->i_mtime); |
| lvb.lvb_atime = LTIME_S(inode->i_atime); |
| lvb.lvb_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) { |
| if (lvb.lvb_atime < attr->cat_atime) |
| lvb.lvb_atime = attr->cat_atime; |
| if (lvb.lvb_ctime < attr->cat_ctime) |
| lvb.lvb_ctime = attr->cat_ctime; |
| if (lvb.lvb_mtime < attr->cat_mtime) |
| lvb.lvb_mtime = attr->cat_mtime; |
| |
| CDEBUG(D_VFSTRACE, DFID" updating i_size %llu\n", |
| PFID(&lli->lli_fid), attr->cat_size); |
| cl_isize_write_nolock(inode, attr->cat_size); |
| |
| inode->i_blocks = attr->cat_blocks; |
| |
| LTIME_S(inode->i_mtime) = lvb.lvb_mtime; |
| LTIME_S(inode->i_atime) = lvb.lvb_atime; |
| LTIME_S(inode->i_ctime) = lvb.lvb_ctime; |
| } |
| ll_inode_size_unlock(inode); |
| |
| return rc; |
| } |
| |
| int ll_glimpse_ioctl(struct ll_sb_info *sbi, struct lov_stripe_md *lsm, |
| lstat_t *st) |
| { |
| struct obdo obdo = { 0 }; |
| int rc; |
| |
| rc = ll_lsm_getattr(lsm, sbi->ll_dt_exp, NULL, &obdo, 0, 0); |
| if (rc == 0) { |
| st->st_size = obdo.o_size; |
| st->st_blocks = obdo.o_blocks; |
| st->st_mtime = obdo.o_mtime; |
| st->st_atime = obdo.o_atime; |
| st->st_ctime = obdo.o_ctime; |
| } |
| 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 & MS_NODIRATIME) && S_ISDIR(inode->i_mode)) |
| return true; |
| |
| return false; |
| } |
| |
| 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 cl_io *io; |
| ssize_t result; |
| |
| restart: |
| io = ccc_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); |
| struct ccc_io *cio = ccc_env_io(env); |
| int write_mutex_locked = 0; |
| |
| cio->cui_fd = LUSTRE_FPRIVATE(file); |
| vio->cui_io_subtype = args->via_io_subtype; |
| |
| switch (vio->cui_io_subtype) { |
| case IO_NORMAL: |
| cio->cui_iter = args->u.normal.via_iter; |
| cio->cui_iocb = args->u.normal.via_iocb; |
| if ((iot == CIT_WRITE) && |
| !(cio->cui_fd->fd_flags & LL_FILE_GROUP_LOCKED)) { |
| if (mutex_lock_interruptible(&lli-> |
| lli_write_mutex)) { |
| result = -ERESTARTSYS; |
| goto out; |
| } |
| write_mutex_locked = 1; |
| } else if (iot == CIT_READ) { |
| down_read(&lli->lli_trunc_sem); |
| } |
| break; |
| case IO_SPLICE: |
| vio->u.splice.cui_pipe = args->u.splice.via_pipe; |
| vio->u.splice.cui_flags = args->u.splice.via_flags; |
| break; |
| default: |
| CERROR("Unknown IO type - %u\n", vio->cui_io_subtype); |
| LBUG(); |
| } |
| result = cl_io_loop(env, io); |
| if (write_mutex_locked) |
| mutex_unlock(&lli->lli_write_mutex); |
| else if (args->via_io_subtype == IO_NORMAL && iot == CIT_READ) |
| up_read(&lli->lli_trunc_sem); |
| } else { |
| /* cl_io_rw_init() handled IO */ |
| result = io->ci_result; |
| } |
| |
| if (io->ci_nob > 0) { |
| result = io->ci_nob; |
| *ppos = io->u.ci_wr.wr.crw_pos; |
| } |
| goto out; |
| out: |
| cl_io_fini(env, io); |
| /* If any bit been read/written (result != 0), we just return |
| * short read/write instead of restart io. */ |
| if ((result == 0 || result == -ENODATA) && io->ci_need_restart) { |
| CDEBUG(D_VFSTRACE, "Restart %s on %pD from %lld, count:%zd\n", |
| iot == CIT_READ ? "read" : "write", |
| file, *ppos, count); |
| LASSERTF(io->ci_nob == 0, "%zd", io->ci_nob); |
| 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 != -ERESTARTSYS) { |
| fd->fd_write_failed = true; |
| } |
| } |
| |
| return result; |
| } |
| |
| 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; |
| int refcheck; |
| |
| env = cl_env_get(&refcheck); |
| if (IS_ERR(env)) |
| return PTR_ERR(env); |
| |
| args = vvp_env_args(env, IO_NORMAL); |
| 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; |
| int refcheck; |
| |
| env = cl_env_get(&refcheck); |
| if (IS_ERR(env)) |
| return PTR_ERR(env); |
| |
| args = vvp_env_args(env, IO_NORMAL); |
| 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; |
| } |
| |
| /* |
| * Send file content (through pagecache) somewhere with helper |
| */ |
| static ssize_t ll_file_splice_read(struct file *in_file, loff_t *ppos, |
| struct pipe_inode_info *pipe, size_t count, |
| unsigned int flags) |
| { |
| struct lu_env *env; |
| struct vvp_io_args *args; |
| ssize_t result; |
| int refcheck; |
| |
| env = cl_env_get(&refcheck); |
| if (IS_ERR(env)) |
| return PTR_ERR(env); |
| |
| args = vvp_env_args(env, IO_SPLICE); |
| args->u.splice.via_pipe = pipe; |
| args->u.splice.via_flags = flags; |
| |
| result = ll_file_io_generic(env, args, in_file, CIT_READ, ppos, count); |
| cl_env_put(env, &refcheck); |
| return result; |
| } |
| |
| static int ll_lov_recreate(struct inode *inode, struct ost_id *oi, u32 ost_idx) |
| { |
| struct obd_export *exp = ll_i2dtexp(inode); |
| struct obd_trans_info oti = { 0 }; |
| struct obdo *oa = NULL; |
| int lsm_size; |
| int rc = 0; |
| struct lov_stripe_md *lsm = NULL, *lsm2; |
| |
| OBDO_ALLOC(oa); |
| if (oa == NULL) |
| return -ENOMEM; |
| |
| lsm = ccc_inode_lsm_get(inode); |
| if (!lsm_has_objects(lsm)) { |
| rc = -ENOENT; |
| goto out; |
| } |
| |
| lsm_size = sizeof(*lsm) + (sizeof(struct lov_oinfo) * |
| (lsm->lsm_stripe_count)); |
| |
| OBD_ALLOC_LARGE(lsm2, lsm_size); |
| if (lsm2 == NULL) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| oa->o_oi = *oi; |
| oa->o_nlink = ost_idx; |
| oa->o_flags |= OBD_FL_RECREATE_OBJS; |
| oa->o_valid = OBD_MD_FLID | OBD_MD_FLFLAGS | OBD_MD_FLGROUP; |
| obdo_from_inode(oa, inode, OBD_MD_FLTYPE | OBD_MD_FLATIME | |
| OBD_MD_FLMTIME | OBD_MD_FLCTIME); |
| obdo_set_parent_fid(oa, &ll_i2info(inode)->lli_fid); |
| memcpy(lsm2, lsm, lsm_size); |
| ll_inode_size_lock(inode); |
| rc = obd_create(NULL, exp, oa, &lsm2, &oti); |
| ll_inode_size_unlock(inode); |
| |
| OBD_FREE_LARGE(lsm2, lsm_size); |
| goto out; |
| out: |
| ccc_inode_lsm_put(inode, lsm); |
| OBDO_FREE(oa); |
| return rc; |
| } |
| |
| static int ll_lov_recreate_obj(struct inode *inode, unsigned long arg) |
| { |
| struct ll_recreate_obj ucreat; |
| struct ost_id oi; |
| |
| if (!capable(CFS_CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&ucreat, (struct ll_recreate_obj *)arg, |
| sizeof(ucreat))) |
| return -EFAULT; |
| |
| ostid_set_seq_mdt0(&oi); |
| ostid_set_id(&oi, ucreat.lrc_id); |
| return ll_lov_recreate(inode, &oi, ucreat.lrc_ost_idx); |
| } |
| |
| static int ll_lov_recreate_fid(struct inode *inode, unsigned long arg) |
| { |
| struct lu_fid fid; |
| struct ost_id oi; |
| u32 ost_idx; |
| |
| if (!capable(CFS_CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&fid, (struct lu_fid *)arg, sizeof(fid))) |
| return -EFAULT; |
| |
| fid_to_ostid(&fid, &oi); |
| ost_idx = (fid_seq(&fid) >> 16) & 0xffff; |
| return ll_lov_recreate(inode, &oi, ost_idx); |
| } |
| |
| int ll_lov_setstripe_ea_info(struct inode *inode, struct dentry *dentry, |
| int flags, struct lov_user_md *lum, int lum_size) |
| { |
| struct lov_stripe_md *lsm = NULL; |
| struct lookup_intent oit = {.it_op = IT_OPEN, .it_flags = flags}; |
| int rc = 0; |
| |
| lsm = ccc_inode_lsm_get(inode); |
| if (lsm != NULL) { |
| ccc_inode_lsm_put(inode, lsm); |
| CDEBUG(D_IOCTL, "stripe already exists for ino %lu\n", |
| inode->i_ino); |
| rc = -EEXIST; |
| goto out; |
| } |
| |
| ll_inode_size_lock(inode); |
| rc = ll_intent_file_open(dentry, lum, lum_size, &oit); |
| if (rc) |
| goto out_unlock; |
| rc = oit.d.lustre.it_status; |
| if (rc < 0) |
| goto out_req_free; |
| |
| ll_release_openhandle(inode, &oit); |
| |
| out_unlock: |
| ll_inode_size_unlock(inode); |
| ll_intent_release(&oit); |
| ccc_inode_lsm_put(inode, lsm); |
| out: |
| return rc; |
| out_req_free: |
| ptlrpc_req_finished((struct ptlrpc_request *) oit.d.lustre.it_data); |
| goto out; |
| } |
| |
| 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); |
| LASSERT(body != NULL); /* checked by mdc_getattr_name */ |
| |
| lmmsize = body->eadatasize; |
| |
| if (!(body->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); |
| LASSERT(lmm != NULL); |
| |
| 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 (LOV_MAGIC != cpu_to_le32(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->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->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) |
| { |
| int 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(CFS_CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| OBD_ALLOC_LARGE(lump, lum_size); |
| if (lump == NULL) |
| return -ENOMEM; |
| |
| if (copy_from_user(lump, (struct lov_user_md *)arg, lum_size)) { |
| OBD_FREE_LARGE(lump, lum_size); |
| 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); |
| |
| OBD_FREE_LARGE(lump, lum_size); |
| return rc; |
| } |
| |
| static int ll_lov_setstripe(struct inode *inode, struct file *file, |
| unsigned long arg) |
| { |
| struct lov_user_md_v3 lumv3; |
| struct lov_user_md_v1 *lumv1 = (struct lov_user_md_v1 *)&lumv3; |
| struct lov_user_md_v1 *lumv1p = (struct lov_user_md_v1 *)arg; |
| struct lov_user_md_v3 *lumv3p = (struct lov_user_md_v3 *)arg; |
| int lum_size, rc; |
| int flags = FMODE_WRITE; |
| |
| /* first try with v1 which is smaller than v3 */ |
| lum_size = sizeof(struct lov_user_md_v1); |
| if (copy_from_user(lumv1, lumv1p, lum_size)) |
| return -EFAULT; |
| |
| if (lumv1->lmm_magic == LOV_USER_MAGIC_V3) { |
| lum_size = sizeof(struct lov_user_md_v3); |
| if (copy_from_user(&lumv3, lumv3p, lum_size)) |
| return -EFAULT; |
| } |
| |
| rc = ll_lov_setstripe_ea_info(inode, file->f_path.dentry, flags, lumv1, |
| lum_size); |
| cl_lov_delay_create_clear(&file->f_flags); |
| if (rc == 0) { |
| struct lov_stripe_md *lsm; |
| __u32 gen; |
| |
| put_user(0, &lumv1p->lmm_stripe_count); |
| |
| ll_layout_refresh(inode, &gen); |
| lsm = ccc_inode_lsm_get(inode); |
| rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), |
| 0, lsm, (void *)arg); |
| ccc_inode_lsm_put(inode, lsm); |
| } |
| return rc; |
| } |
| |
| static int ll_lov_getstripe(struct inode *inode, unsigned long arg) |
| { |
| struct lov_stripe_md *lsm; |
| int rc = -ENODATA; |
| |
| lsm = ccc_inode_lsm_get(inode); |
| if (lsm != NULL) |
| rc = obd_iocontrol(LL_IOC_LOV_GETSTRIPE, ll_i2dtexp(inode), 0, |
| lsm, (void *)arg); |
| ccc_inode_lsm_put(inode, lsm); |
| 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 ccc_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.cg_gid); |
| spin_unlock(&lli->lli_lock); |
| return -EINVAL; |
| } |
| LASSERT(fd->fd_grouplock.cg_lock == NULL); |
| spin_unlock(&lli->lli_lock); |
| |
| rc = cl_get_grouplock(cl_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 ccc_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.cg_lock != NULL); |
| |
| if (fd->fd_grouplock.cg_gid != arg) { |
| CWARN("group lock %lu doesn't match current id %lu\n", |
| arg, fd->fd_grouplock.cg_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(ll_i2sbi(inode)->ll_md_exp, |
| inode, och, NULL); |
| out: |
| /* this one is in place of ll_file_open */ |
| if (it_disposition(it, DISP_ENQ_OPEN_REF)) { |
| ptlrpc_req_finished(it->d.lustre.it_data); |
| 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. |
| */ |
| static int ll_do_fiemap(struct inode *inode, struct ll_user_fiemap *fiemap, |
| size_t num_bytes) |
| { |
| struct obd_export *exp = ll_i2dtexp(inode); |
| struct lov_stripe_md *lsm = NULL; |
| struct ll_fiemap_info_key fm_key = { .name = KEY_FIEMAP, }; |
| __u32 vallen = num_bytes; |
| int rc; |
| |
| /* 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; |
| } |
| |
| lsm = ccc_inode_lsm_get(inode); |
| if (lsm == NULL) |
| return -ENOENT; |
| |
| /* If the stripe_count > 1 and the application does not understand |
| * DEVICE_ORDER flag, then it cannot interpret the extents correctly. |
| */ |
| if (lsm->lsm_stripe_count > 1 && |
| !(fiemap->fm_flags & FIEMAP_FLAG_DEVICE_ORDER)) { |
| rc = -EOPNOTSUPP; |
| goto out; |
| } |
| |
| fm_key.oa.o_oi = lsm->lsm_oi; |
| fm_key.oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP; |
| |
| obdo_from_inode(&fm_key.oa, inode, OBD_MD_FLSIZE); |
| obdo_set_parent_fid(&fm_key.oa, &ll_i2info(inode)->lli_fid); |
| /* If filesize is 0, then there would be no objects for mapping */ |
| if (fm_key.oa.o_size == 0) { |
| fiemap->fm_mapped_extents = 0; |
| rc = 0; |
| goto out; |
| } |
| |
| memcpy(&fm_key.fiemap, fiemap, sizeof(*fiemap)); |
| |
| rc = obd_get_info(NULL, exp, sizeof(fm_key), &fm_key, &vallen, |
| fiemap, lsm); |
| if (rc) |
| CERROR("obd_get_info failed: rc = %d\n", rc); |
| |
| out: |
| ccc_inode_lsm_put(inode, lsm); |
| 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(CFS_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: |
| OBD_FREE(gfout, outsize); |
| return rc; |
| } |
| |
| static int ll_ioctl_fiemap(struct inode *inode, unsigned long arg) |
| { |
| struct ll_user_fiemap *fiemap_s; |
| size_t num_bytes, ret_bytes; |
| unsigned int extent_count; |
| int rc = 0; |
| |
| /* Get the extent count so we can calculate the size of |
| * required fiemap buffer */ |
| if (get_user(extent_count, |
| &((struct ll_user_fiemap __user *)arg)->fm_extent_count)) |
| return -EFAULT; |
| |
| if (extent_count >= |
| (SIZE_MAX - sizeof(*fiemap_s)) / sizeof(struct ll_fiemap_extent)) |
| return -EINVAL; |
| num_bytes = sizeof(*fiemap_s) + (extent_count * |
| sizeof(struct ll_fiemap_extent)); |
| |
| OBD_ALLOC_LARGE(fiemap_s, num_bytes); |
| if (fiemap_s == NULL) |
| return -ENOMEM; |
| |
| /* get the fiemap value */ |
| if (copy_from_user(fiemap_s, (struct ll_user_fiemap __user *)arg, |
| sizeof(*fiemap_s))) { |
| rc = -EFAULT; |
| goto error; |
| } |
| |
| /* If fm_extent_count is non-zero, read the first extent since |
| * it is used to calculate end_offset and device from previous |
| * fiemap call. */ |
| if (extent_count) { |
| if (copy_from_user(&fiemap_s->fm_extents[0], |
| (char __user *)arg + sizeof(*fiemap_s), |
| sizeof(struct ll_fiemap_extent))) { |
| rc = -EFAULT; |
| goto error; |
| } |
| } |
| |
| rc = ll_do_fiemap(inode, fiemap_s, num_bytes); |
| if (rc) |
| goto error; |
| |
| ret_bytes = sizeof(struct ll_user_fiemap); |
| |
| if (extent_count != 0) |
| ret_bytes += (fiemap_s->fm_mapped_extents * |
| sizeof(struct ll_fiemap_extent)); |
| |
| if (copy_to_user((void *)arg, fiemap_s, ret_bytes)) |
| rc = -EFAULT; |
| |
| error: |
| OBD_FREE_LARGE(fiemap_s, num_bytes); |
| 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 extent_lock Take extent lock. Not needed if a process is already |
| * holding the OST object group locks. |
| */ |
| int ll_data_version(struct inode *inode, __u64 *data_version, |
| int extent_lock) |
| { |
| struct lov_stripe_md *lsm = NULL; |
| struct ll_sb_info *sbi = ll_i2sbi(inode); |
| struct obdo *obdo = NULL; |
| int rc; |
| |
| /* If no stripe, we consider version is 0. */ |
| lsm = ccc_inode_lsm_get(inode); |
| if (!lsm_has_objects(lsm)) { |
| *data_version = 0; |
| CDEBUG(D_INODE, "No object for inode\n"); |
| rc = 0; |
| goto out; |
| } |
| |
| obdo = kzalloc(sizeof(*obdo), GFP_NOFS); |
| if (!obdo) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| rc = ll_lsm_getattr(lsm, sbi->ll_dt_exp, NULL, obdo, 0, extent_lock); |
| if (rc == 0) { |
| if (!(obdo->o_valid & OBD_MD_FLDATAVERSION)) |
| rc = -EOPNOTSUPP; |
| else |
| *data_version = obdo->o_data_version; |
| } |
| |
| OBD_FREE_PTR(obdo); |
| out: |
| ccc_inode_lsm_put(inode, lsm); |
| return rc; |
| } |
| |
| /* |
| * Trigger a HSM release request for the provided inode. |
| */ |
| int ll_hsm_release(struct inode *inode) |
| { |
| struct cl_env_nest nest; |
| struct lu_env *env; |
| struct obd_client_handle *och = NULL; |
| __u64 data_version = 0; |
| int rc; |
| |
| |
| 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, 1); |
| if (rc != 0) |
| goto out; |
| |
| env = cl_env_nested_get(&nest); |
| if (IS_ERR(env)) { |
| rc = PTR_ERR(env); |
| goto out; |
| } |
| |
| ll_merge_lvb(env, inode); |
| cl_env_nested_put(&nest, env); |
| |
| /* 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(ll_i2sbi(inode)->ll_md_exp, inode, och, |
| &data_version); |
| och = NULL; |
| |
| |
| out: |
| if (och != NULL && !IS_ERR(och)) /* close the file */ |
| ll_lease_close(och, inode, NULL); |
| |
| return rc; |
| } |
| |
| struct ll_swap_stack { |
| struct iattr ia1, ia2; |
| __u64 dv1, dv2; |
| struct inode *inode1, *inode2; |
| bool check_dv1, 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); |
| |
| if (!S_ISREG(llss->inode2->i_mode)) { |
| rc = -EINVAL; |
| goto free; |
| } |
| |
| if (inode_permission(llss->inode1, MAY_WRITE) || |
| inode_permission(llss->inode2, MAY_WRITE)) { |
| rc = -EPERM; |
| goto free; |
| } |
| |
| if (llss->inode2->i_sb != llss->inode1->i_sb) { |
| rc = -EXDEV; |
| 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 == 0) /* same file, done! */ { |
| rc = 0; |
| 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; |
| } |
| } |
| |
| /* to be able to restore mtime and atime after swap |
| * we need to first save them */ |
| if (lsl->sl_flags & |
| (SWAP_LAYOUTS_KEEP_MTIME | SWAP_LAYOUTS_KEEP_ATIME)) { |
| llss->ia1.ia_mtime = llss->inode1->i_mtime; |
| llss->ia1.ia_atime = llss->inode1->i_atime; |
| llss->ia1.ia_valid = ATTR_MTIME | ATTR_ATIME; |
| llss->ia2.ia_mtime = llss->inode2->i_mtime; |
| llss->ia2.ia_atime = llss->inode2->i_atime; |
| llss->ia2.ia_valid = ATTR_MTIME | ATTR_ATIME; |
| } |
| |
| /* 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); |
| } |
| |
| /* rc can be set from obd_iocontrol() or from a GOTO(putgl, ...) */ |
| if (rc != 0) |
| goto free; |
| |
| /* clear useless flags */ |
| if (!(lsl->sl_flags & SWAP_LAYOUTS_KEEP_MTIME)) { |
| llss->ia1.ia_valid &= ~ATTR_MTIME; |
| llss->ia2.ia_valid &= ~ATTR_MTIME; |
| } |
| |
| if (!(lsl->sl_flags & SWAP_LAYOUTS_KEEP_ATIME)) { |
| llss->ia1.ia_valid &= ~ATTR_ATIME; |
| llss->ia2.ia_valid &= ~ATTR_ATIME; |
| } |
| |
| /* update time if requested */ |
| rc = 0; |
| if (llss->ia2.ia_valid != 0) { |
| mutex_lock(&llss->inode1->i_mutex); |
| rc = ll_setattr(file1->f_path.dentry, &llss->ia2); |
| mutex_unlock(&llss->inode1->i_mutex); |
| } |
| |
| if (llss->ia1.ia_valid != 0) { |
| int rc1; |
| |
| mutex_lock(&llss->inode2->i_mutex); |
| rc1 = ll_setattr(file2->f_path.dentry, &llss->ia1); |
| mutex_unlock(&llss->inode2->i_mutex); |
| if (rc == 0) |
| rc = rc1; |
| } |
| |
| free: |
| if (llss != NULL) |
| OBD_FREE_PTR(llss); |
| |
| return rc; |
| } |
| |
| static int ll_hsm_state_set(struct inode *inode, struct hsm_state_set *hss) |
| { |
| struct md_op_data *op_data; |
| int rc; |
| |
| /* 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(CFS_CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| 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) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| 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 out; |
| |
| attr = kzalloc(sizeof(*attr), GFP_NOFS); |
| if (!attr) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| attr->ia_mode = hui->hui_mode & (S_IRWXU | S_IRWXG | S_IRWXO); |
| 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; |
| |
| mutex_lock(&inode->i_mutex); |
| |
| rc = ll_setattr_raw(file->f_path.dentry, attr, true); |
| if (rc == -ENODATA) |
| rc = 0; |
| |
| mutex_unlock(&inode->i_mutex); |
| |
| out: |
| if (hss != NULL) |
| OBD_FREE_PTR(hss); |
| |
| if (attr != NULL) |
| OBD_FREE_PTR(attr); |
| |
| return rc; |
| } |
| |
| 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=%lu/%u(%p),cmd=%x\n", inode->i_ino, |
| inode->i_generation, 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 *)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 *) 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 *)arg, |
| sizeof(struct lustre_swap_layouts))) |
| return -EFAULT; |
| |
| if ((file->f_flags & O_ACCMODE) == 0) /* O_RDONLY */ |
| return -EPERM; |
| |
| file2 = fget(lsl.sl_fd); |
| if (file2 == NULL) |
| return -EBADF; |
| |
| rc = -EPERM; |
| if ((file2->f_flags & O_ACCMODE) != 0) /* O_WRONLY or O_RDWR */ |
| rc = ll_swap_layouts(file, file2, &lsl); |
| fput(file2); |
| return rc; |
| } |
| case LL_IOC_LOV_GETSTRIPE: |
| return ll_lov_getstripe(inode, arg); |
| case LL_IOC_RECREATE_OBJ: |
| return ll_lov_recreate_obj(inode, arg); |
| case LL_IOC_RECREATE_FID: |
| return ll_lov_recreate_fid(inode, arg); |
| case FSFILT_IOC_FIEMAP: |
| return ll_ioctl_fiemap(inode, 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 *)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 *)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 *)arg, ll_inode2fid(inode), |
| sizeof(struct lu_fid))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| case OBD_IOC_FID2PATH: |
| return ll_fid2path(inode, (void *)arg); |
| case LL_IOC_DATA_VERSION: { |
| struct ioc_data_version idv; |
| int rc; |
| |
| if (copy_from_user(&idv, (char *)arg, sizeof(idv))) |
| return -EFAULT; |
| |
| rc = ll_data_version(inode, &idv.idv_version, |
| !(idv.idv_flags & LL_DV_NOFLUSH)); |
| |
| if (rc == 0 && copy_to_user((char *) 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((int)mdtidx, (int *)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)) { |
| OBD_FREE_PTR(hus); |
| return PTR_ERR(op_data); |
| } |
| |
| rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data), |
| op_data, NULL); |
| |
| if (copy_to_user((void *)arg, hus, sizeof(*hus))) |
| rc = -EFAULT; |
| |
| ll_finish_md_op_data(op_data); |
| OBD_FREE_PTR(hus); |
| return rc; |
| } |
| case LL_IOC_HSM_STATE_SET: { |
| struct hsm_state_set *hss; |
| int rc; |
| |
| hss = kzalloc(sizeof(*hss), GFP_NOFS); |
| if (!hss) |
| return -ENOMEM; |
| |
| if (copy_from_user(hss, (char *)arg, sizeof(*hss))) { |
| OBD_FREE_PTR(hss); |
| return -EFAULT; |
| } |
| |
| rc = ll_hsm_state_set(inode, hss); |
| |
| OBD_FREE_PTR(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)) { |
| OBD_FREE_PTR(hca); |
| return PTR_ERR(op_data); |
| } |
| |
| rc = obd_iocontrol(cmd, ll_i2mdexp(inode), sizeof(*op_data), |
| op_data, NULL); |
| |
| if (copy_to_user((char *)arg, hca, sizeof(*hca))) |
| rc = -EFAULT; |
| |
| ll_finish_md_op_data(op_data); |
| OBD_FREE_PTR(hca); |
| return rc; |
| } |
| case LL_IOC_SET_LEASE: { |
| struct ll_inode_info *lli = ll_i2info(inode); |
| struct obd_client_handle *och = NULL; |
| bool lease_broken; |
| fmode_t mode = 0; |
| |
| switch (arg) { |
| case F_WRLCK: |
| if (!(file->f_mode & FMODE_WRITE)) |
| return -EPERM; |
| mode = FMODE_WRITE; |
| break; |
| case F_RDLCK: |
| if (!(file->f_mode & FMODE_READ)) |
| return -EPERM; |
| mode = FMODE_READ; |
| break; |
| case F_UNLCK: |
| mutex_lock(&lli->lli_och_mutex); |
| if (fd->fd_lease_och != NULL) { |
| och = fd->fd_lease_och; |
| fd->fd_lease_och = NULL; |
| } |
| mutex_unlock(&lli->lli_och_mutex); |
| |
| if (och != NULL) { |
| mode = och->och_flags & |
| (FMODE_READ|FMODE_WRITE); |
| rc = ll_lease_close(och, inode, &lease_broken); |
| if (rc == 0 && lease_broken) |
| mode = 0; |
| } else { |
| rc = -ENOLCK; |
| } |
| |
| /* return the type of lease or error */ |
| return rc < 0 ? rc : (int)mode; |
| default: |
| return -EINVAL; |
| } |
| |
| CDEBUG(D_INODE, "Set lease with mode %d\n", mode); |
| |
| /* apply for lease */ |
| och = ll_lease_open(inode, file, mode, 0); |
| if (IS_ERR(och)) |
| return PTR_ERR(och); |
| |
| rc = 0; |
| mutex_lock(&lli->lli_och_mutex); |
| if (fd->fd_lease_och == NULL) { |
| fd->fd_lease_och = och; |
| och = NULL; |
| } |
| mutex_unlock(&lli->lli_och_mutex); |
| if (och != NULL) { |
| /* impossible now that only excl is supported for now */ |
| ll_lease_close(och, inode, &lease_broken); |
| rc = -EBUSY; |
| } |
| return rc; |
| } |
| case LL_IOC_GET_LEASE: { |
| struct ll_inode_info *lli = ll_i2info(inode); |
| struct ldlm_lock *lock = NULL; |
| |
| rc = 0; |
| mutex_lock(&lli->lli_och_mutex); |
| if (fd->fd_lease_och != NULL) { |
| struct obd_client_handle *och = fd->fd_lease_och; |
| |
| lock = ldlm_handle2lock(&och->och_lease_handle); |
| if (lock != NULL) { |
| lock_res_and_lock(lock); |
| if (!ldlm_is_cancel(lock)) |
| rc = och->och_flags & |
| (FMODE_READ | FMODE_WRITE); |
| unlock_res_and_lock(lock); |
| ldlm_lock_put(lock); |
| } |
| } |
| mutex_unlock(&lli->lli_och_mutex); |
| return rc; |
| } |
| case LL_IOC_HSM_IMPORT: { |
| struct hsm_user_import *hui; |
| |
| hui = kzalloc(sizeof(*hui), GFP_NOFS); |
| if (!hui) |
| return -ENOMEM; |
| |
| if (copy_from_user(hui, (void *)arg, sizeof(*hui))) { |
| OBD_FREE_PTR(hui); |
| return -EFAULT; |
| } |
| |
| rc = ll_hsm_import(inode, file, hui); |
| |
| OBD_FREE_PTR(hui); |
| return rc; |
| } |
| default: { |
| int err; |
| |
| if (LLIOC_STOP == |
| ll_iocontrol_call(inode, file, cmd, arg, &err)) |
| return err; |
| |
| return obd_iocontrol(cmd, ll_i2dtexp(inode), 0, NULL, |
| (void *)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=%lu/%u(%p), to=%llu=%#llx(%d)\n", |
| inode->i_ino, inode->i_generation, 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); |
| } |
| |
| retval = generic_file_llseek_size(file, offset, origin, |
| ll_file_maxbytes(inode), eof); |
| return retval; |
| } |
| |
| 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; |
| err = lov_read_and_clear_async_rc(lli->lli_clob); |
| if (rc == 0) |
| rc = err; |
| |
| /* The application has been told 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 cl_env_nest nest; |
| struct lu_env *env; |
| struct cl_io *io; |
| struct obd_capa *capa = NULL; |
| struct cl_fsync_io *fio; |
| int result; |
| |
| if (mode != CL_FSYNC_NONE && mode != CL_FSYNC_LOCAL && |
| mode != CL_FSYNC_DISCARD && mode != CL_FSYNC_ALL) |
| return -EINVAL; |
| |
| env = cl_env_nested_get(&nest); |
| if (IS_ERR(env)) |
| return PTR_ERR(env); |
| |
| capa = ll_osscapa_get(inode, CAPA_OPC_OSS_WRITE); |
| |
| io = ccc_env_thread_io(env); |
| io->ci_obj = cl_i2info(inode)->lli_clob; |
| io->ci_ignore_layout = ignore_layout; |
| |
| /* initialize parameters for sync */ |
| fio = &io->u.ci_fsync; |
| fio->fi_capa = capa; |
| 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_nested_put(&nest, env); |
| |
| capa_put(capa); |
| |
| 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; |
| struct obd_capa *oc; |
| int rc, err; |
| |
| CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p)\n", inode->i_ino, |
| inode->i_generation, inode); |
| ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_FSYNC, 1); |
| |
| rc = filemap_write_and_wait_range(inode->i_mapping, start, end); |
| mutex_lock(&inode->i_mutex); |
| |
| /* 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; |
| err = lov_read_and_clear_async_rc(lli->lli_clob); |
| if (rc == 0) |
| rc = err; |
| } |
| |
| oc = ll_mdscapa_get(inode); |
| err = md_sync(ll_i2sbi(inode)->ll_md_exp, ll_inode2fid(inode), oc, |
| &req); |
| capa_put(oc); |
| 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; |
| } |
| |
| mutex_unlock(&inode->i_mutex); |
| 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}; |
| ldlm_policy_data_t flock = {{0}}; |
| __u64 flags = 0; |
| int rc; |
| int rc2 = 0; |
| |
| CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu file_lock=%p\n", |
| inode->i_ino, 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 (file_lock->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", |
| file_lock->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; |
| /* 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; |
| break; |
| default: |
| CERROR("unknown fcntl lock command: %d\n", cmd); |
| return -EINVAL; |
| } |
| |
| 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=%lu, pid=%u, flags=%#llx, mode=%u, start=%llu, end=%llu\n", |
| inode->i_ino, flock.l_flock.pid, flags, einfo.ei_mode, |
| flock.l_flock.start, flock.l_flock.end); |
| |
| rc = md_enqueue(sbi->ll_md_exp, &einfo, NULL, |
| op_data, &lockh, &flock, 0, NULL /* req */, flags); |
| |
| if ((file_lock->fl_flags & FL_FLOCK) && |
| (rc == 0 || file_lock->fl_type == F_UNLCK)) |
| rc2 = flock_lock_file_wait(file, file_lock); |
| if ((file_lock->fl_flags & FL_POSIX) && |
| (rc == 0 || file_lock->fl_type == F_UNLCK) && |
| !(flags & LDLM_FL_TEST_LOCK)) |
| rc2 = posix_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, NULL, |
| op_data, &lockh, &flock, 0, NULL /* req */, flags); |
| rc = rc2; |
| } |
| |
| 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, ldlm_mode_t l_req_mode) |
| { |
| struct lustre_handle lockh; |
| ldlm_policy_data_t policy; |
| ldlm_mode_t 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; |
| } |
| |
| ldlm_mode_t ll_take_md_lock(struct inode *inode, __u64 bits, |
| struct lustre_handle *lockh, __u64 flags, |
| ldlm_mode_t mode) |
| { |
| ldlm_policy_data_t policy = { .l_inodebits = {bits} }; |
| struct lu_fid *fid; |
| ldlm_mode_t rc; |
| |
| fid = &ll_i2info(inode)->lli_fid; |
| CDEBUG(D_INFO, "trying to match res "DFID"\n", PFID(fid)); |
| |
| rc = md_lock_match(ll_i2mdexp(inode), LDLM_FL_BLOCK_GRANTED|flags, |
| fid, LDLM_IBITS, &policy, mode, lockh); |
| |
| return rc; |
| } |
| |
| 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); |
| /* 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 = dentry->d_inode; |
| struct ptlrpc_request *req = NULL; |
| struct obd_export *exp; |
| int rc = 0; |
| |
| LASSERT(inode != NULL); |
| |
| CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p),name=%pd\n", |
| inode->i_ino, inode->i_generation, 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); |
| |
| oit.it_create_mode |= M_CHECK_STALE; |
| rc = md_intent_lock(exp, op_data, NULL, 0, |
| /* we are not interested in name |
| based lookup */ |
| &oit, 0, &req, |
| ll_md_blocking_ast, 0); |
| ll_finish_md_op_data(op_data); |
| oit.it_create_mode &= ~M_CHECK_STALE; |
| 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 (!dentry->d_inode->i_nlink) |
| d_lustre_invalidate(dentry, 0); |
| |
| ll_lookup_finish_locks(&oit, inode); |
| } else if (!ll_have_md_lock(dentry->d_inode, &ibits, LCK_MINMODE)) { |
| struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode); |
| 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; |
| /* Once OBD_CONNECT_ATTRFID is not supported, we can't find one |
| * capa for this inode. Because we only keep capas of dirs |
| * fresh. */ |
| rc = md_getattr(sbi->ll_md_exp, op_data, &req); |
| ll_finish_md_op_data(op_data); |
| if (rc) { |
| rc = ll_inode_revalidate_fini(inode, rc); |
| return rc; |
| } |
| |
| rc = ll_prep_inode(&inode, req, NULL, NULL); |
| } |
| out: |
| ptlrpc_req_finished(req); |
| return rc; |
| } |
| |
| static int ll_inode_revalidate(struct dentry *dentry, __u64 ibits) |
| { |
| struct inode *inode = dentry->d_inode; |
| 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)) { |
| LTIME_S(inode->i_atime) = ll_i2info(inode)->lli_lvb.lvb_atime; |
| LTIME_S(inode->i_mtime) = ll_i2info(inode)->lli_lvb.lvb_mtime; |
| LTIME_S(inode->i_ctime) = ll_i2info(inode)->lli_lvb.lvb_ctime; |
| } else { |
| /* 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 (!(ll_i2info(inode)->lli_flags & LLIF_FILE_RESTORING)) |
| rc = ll_glimpse_size(inode); |
| } |
| return rc; |
| } |
| |
| int ll_getattr(struct vfsmount *mnt, struct dentry *de, struct kstat *stat) |
| { |
| struct inode *inode = de->d_inode; |
| struct ll_sb_info *sbi = ll_i2sbi(inode); |
| struct ll_inode_info *lli = ll_i2info(inode); |
| int res = 0; |
| |
| res = ll_inode_revalidate(de, MDS_INODELOCK_UPDATE | |
| MDS_INODELOCK_LOOKUP); |
| ll_stats_ops_tally(sbi, LPROC_LL_GETATTR, 1); |
| |
| if (res) |
| return res; |
| |
| 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->nlink = inode->i_nlink; |
| 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->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 ll_user_fiemap *fiemap; |
| unsigned int extent_count = fieinfo->fi_extents_max; |
| |
| num_bytes = sizeof(*fiemap) + (extent_count * |
| sizeof(struct ll_fiemap_extent)); |
| OBD_ALLOC_LARGE(fiemap, num_bytes); |
| |
| if (fiemap == NULL) |
| 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) |
| memcpy(&fiemap->fm_extents[0], fieinfo->fi_extents_start, |
| sizeof(struct ll_fiemap_extent)); |
| |
| 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) |
| memcpy(fieinfo->fi_extents_start, &fiemap->fm_extents[0], |
| fiemap->fm_mapped_extents * |
| sizeof(struct ll_fiemap_extent)); |
| |
| OBD_FREE_LARGE(fiemap, num_bytes); |
| 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) |
| { |
| int rc = 0; |
| |
| #ifdef MAY_NOT_BLOCK |
| if (mask & MAY_NOT_BLOCK) |
| return -ECHILD; |
| #endif |
| |
| /* 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=%lu/%u(%p), inode mode %x mask %o\n", |
| inode->i_ino, inode->i_generation, inode, inode->i_mode, mask); |
| |
| if (ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT) |
| return lustre_check_remote_perm(inode, mask); |
| |
| ll_stats_ops_tally(ll_i2sbi(inode), LPROC_LL_INODE_PERM, 1); |
| rc = generic_permission(inode, mask); |
| |
| return rc; |
| } |
| |
| /* -o localflock - only provides locally consistent flock locks */ |
| struct file_operations ll_file_operations = { |
| .read = new_sync_read, |
| .read_iter = ll_file_read_iter, |
| .write = new_sync_write, |
| .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 = ll_file_splice_read, |
| .fsync = ll_fsync, |
| .flush = ll_flush |
| }; |
| |
| struct file_operations ll_file_operations_flock = { |
| .read = new_sync_read, |
| .read_iter = ll_file_read_iter, |
| .write = new_sync_write, |
| .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 = ll_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 */ |
| struct file_operations ll_file_operations_noflock = { |
| .read = new_sync_read, |
| .read_iter = ll_file_read_iter, |
| .write = new_sync_write, |
| .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 = ll_file_splice_read, |
| .fsync = ll_fsync, |
| .flush = ll_flush, |
| .flock = ll_file_noflock, |
| .lock = ll_file_noflock |
| }; |
| |
| struct inode_operations ll_file_inode_operations = { |
| .setattr = ll_setattr, |
| .getattr = ll_getattr, |
| .permission = ll_inode_permission, |
| .setxattr = ll_setxattr, |
| .getxattr = ll_getxattr, |
| .listxattr = ll_listxattr, |
| .removexattr = ll_removexattr, |
| .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 == NULL || cmd == NULL || |
| 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; |
| |
| memset(in_data, 0, sizeof(*in_data)); |
| 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; |
| } |
| |
| void ll_iocontrol_unregister(void *magic) |
| { |
| struct llioc_data *tmp; |
| |
| if (magic == NULL) |
| return; |
| |
| down_write(&llioc.ioc_sem); |
| list_for_each_entry(tmp, &llioc.ioc_head, iocd_list) { |
| if (tmp == magic) { |
| unsigned int size = tmp->iocd_size; |
| |
| list_del(&tmp->iocd_list); |
| up_write(&llioc.ioc_sem); |
| |
| OBD_FREE(tmp, size); |
| return; |
| } |
| } |
| up_write(&llioc.ioc_sem); |
| |
| CWARN("didn't find iocontrol register block with magic: %p\n", magic); |
| } |
| |
| EXPORT_SYMBOL(ll_iocontrol_register); |
| 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_env_nest nest; |
| struct lu_env *env; |
| int result; |
| |
| if (lli->lli_clob == NULL) |
| return 0; |
| |
| env = cl_env_nested_get(&nest); |
| if (IS_ERR(env)) |
| return PTR_ERR(env); |
| |
| result = cl_conf_set(env, lli->lli_clob, conf); |
| cl_env_nested_put(&nest, env); |
| |
| if (conf->coc_opc == OBJECT_CONF_SET) { |
| struct ldlm_lock *lock = conf->coc_lock; |
| |
| LASSERT(lock != NULL); |
| LASSERT(ldlm_has_layout(lock)); |
| if (result == 0) { |
| /* 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); |
| } |
| } |
| return result; |
| } |
| |
| /* 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 obd_capa *oc; |
| 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)), !!(lock->l_flags & LDLM_FL_LVB_READY), |
| lock->l_lvb_data, lock->l_lvb_len); |
| |
| if ((lock->l_lvb_data != NULL) && (lock->l_flags & LDLM_FL_LVB_READY)) |
| 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 */ |
| oc = ll_mdscapa_get(inode); |
| rc = ll_get_default_mdsize(sbi, &lmmsize); |
| if (rc == 0) |
| rc = md_getxattr(sbi->ll_md_exp, ll_inode2fid(inode), oc, |
| OBD_MD_FLXATTR, XATTR_NAME_LOV, NULL, 0, |
| lmmsize, 0, &req); |
| capa_put(oc); |
| if (rc < 0) |
| return rc; |
| |
| body = req_capsule_server_get(&req->rq_pill, &RMF_MDT_BODY); |
| if (body == NULL) { |
| rc = -EPROTO; |
| goto out; |
| } |
| |
| lmmsize = body->eadatasize; |
| if (lmmsize == 0) /* empty layout */ { |
| rc = 0; |
| goto out; |
| } |
| |
| lmm = req_capsule_server_sized_get(&req->rq_pill, &RMF_EADATA, lmmsize); |
| if (lmm == NULL) { |
| rc = -EFAULT; |
| goto out; |
| } |
| |
| OBD_ALLOC_LARGE(lvbdata, lmmsize); |
| if (lvbdata == NULL) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| |
| memcpy(lvbdata, lmm, lmmsize); |
| lock_res_and_lock(lock); |
| if (lock->l_lvb_data != NULL) |
| OBD_FREE_LARGE(lock->l_lvb_data, lock->l_lvb_len); |
| |
| 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, ldlm_mode_t mode, |
| struct inode *inode, __u32 *gen, bool reconf) |
| { |
| struct ll_inode_info *lli = ll_i2info(inode); |
| struct ll_sb_info *sbi = ll_i2sbi(inode); |
| struct ldlm_lock *lock; |
| struct lustre_md md = { NULL }; |
| 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 != NULL); |
| LASSERT(ldlm_has_layout(lock)); |
| |
| LDLM_DEBUG(lock, "File %p/"DFID" being reconfigured: %d.\n", |
| inode, PFID(&lli->lli_fid), reconf); |
| |
| /* in case this is a caching lock and reinstate with new inode */ |
| md_set_lock_data(sbi->ll_md_exp, &lockh->cookie, inode, NULL); |
| |
| lock_res_and_lock(lock); |
| lvb_ready = !!(lock->l_flags & LDLM_FL_LVB_READY); |
| 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 || !reconf) { |
| rc = -ENODATA; |
| if (lvb_ready) { |
| /* layout_gen must be valid if layout lock is not |
| * cancelled and stripe has already set */ |
| *gen = ll_layout_version_get(lli); |
| 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. See the description in ldlm_lock_decref_internal() |
| * for the condition to free lvb_data of layout lock */ |
| if (lock->l_lvb_data != NULL) { |
| rc = obd_unpackmd(sbi->ll_dt_exp, &md.lsm, |
| lock->l_lvb_data, lock->l_lvb_len); |
| if (rc >= 0) { |
| *gen = LL_LAYOUT_GEN_EMPTY; |
| if (md.lsm != NULL) |
| *gen = md.lsm->lsm_layout_gen; |
| rc = 0; |
| } else { |
| CERROR("%s: file "DFID" unpackmd error: %d\n", |
| ll_get_fsname(inode->i_sb, NULL, 0), |
| PFID(&lli->lli_fid), rc); |
| } |
| } |
| if (rc < 0) |
| goto out; |
| |
| /* 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_md = &md; |
| rc = ll_layout_conf(inode, &conf); |
| |
| if (md.lsm != NULL) |
| obd_free_memmd(sbi->ll_dt_exp, &md.lsm); |
| |
| /* 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: %p/"DFID" wait for layout reconf.\n", |
| ll_get_fsname(inode->i_sb, NULL, 0), |
| inode, PFID(&lli->lli_fid)); |
| |
| 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, "file: "DFID" waiting layout return: %d.\n", |
| PFID(&lli->lli_fid), rc); |
| } |
| 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); |
| struct md_op_data *op_data; |
| struct lookup_intent it; |
| struct lustre_handle lockh; |
| ldlm_mode_t 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; |
| |
| *gen = ll_layout_version_get(lli); |
| if (!(sbi->ll_flags & LL_SBI_LAYOUT_LOCK) || *gen != LL_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); |
| |
| 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, gen, true); |
| if (rc == -EAGAIN) |
| goto again; |
| |
| mutex_unlock(&lli->lli_layout_mutex); |
| return rc; |
| } |
| |
| op_data = ll_prep_md_op_data(NULL, inode, inode, NULL, |
| 0, 0, LUSTRE_OPC_ANY, NULL); |
| if (IS_ERR(op_data)) { |
| mutex_unlock(&lli->lli_layout_mutex); |
| 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 %p/"DFID".\n", |
| ll_get_fsname(inode->i_sb, NULL, 0), inode, |
| PFID(&lli->lli_fid)); |
| |
| rc = md_enqueue(sbi->ll_md_exp, &einfo, &it, op_data, &lockh, |
| NULL, 0, NULL, 0); |
| if (it.d.lustre.it_data != NULL) |
| ptlrpc_req_finished(it.d.lustre.it_data); |
| it.d.lustre.it_data = NULL; |
| |
| ll_finish_md_op_data(op_data); |
| |
| mode = it.d.lustre.it_lock_mode; |
| it.d.lustre.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, gen, true); |
| if (rc == -EAGAIN) |
| goto again; |
| } |
| mutex_unlock(&lli->lli_layout_mutex); |
| |
| return rc; |
| } |
| |
| /** |
| * This function send a restore request to the MDT |
| */ |
| int ll_layout_restore(struct inode *inode) |
| { |
| 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.length = -1; |
| hur->hur_request.hr_itemcount = 1; |
| rc = obd_iocontrol(LL_IOC_HSM_REQUEST, cl_i2sbi(inode)->ll_md_exp, |
| len, hur, NULL); |
| OBD_FREE(hur, len); |
| return rc; |
| } |