-/*
- * file.c
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * lustre/smfs/inode.c
+ * Lustre filesystem abstraction routines
+ *
+ * Copyright (C) 2004 Cluster File Systems, Inc.
+ *
+ * This file is part of Lustre, http://www.lustre.org.
+ *
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define DEBUG_SUBSYSTEM S_SM
#include <linux/stat.h>
#include <linux/unistd.h>
#include <linux/pagemap.h>
-#include "smfs_internal.h"
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/obd_class.h>
+#include <linux/obd_support.h>
+#include <linux/lustre_lib.h>
+#include <linux/lustre_idl.h>
+#include <linux/lustre_fsfilt.h>
+#include <linux/lustre_smfs.h>
+#include <linux/lustre_snap.h>
+
+#include "smfs_internal.h"
+
+static ssize_t smfs_write(struct file *filp, const char *buf, size_t count,
+ loff_t *ppos)
+{
+ struct inode *cache_inode = I2CI(filp->f_dentry->d_inode);
+ struct smfs_file_info *sfi;
+ loff_t *cache_ppos = NULL;
+ int rc = 0;
+ struct hook_write_msg msg = {
+ .dentry = filp->f_dentry,
+ .count = count,
+ .pos = *ppos
+ };
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_fop->write);
+
+ sfi = F2SMFI(filp);
+
+ if (sfi->magic != SMFS_FILE_MAGIC)
+ LBUG();
+
+ if (filp->f_flags & O_APPEND)
+ msg.pos = filp->f_dentry->d_inode->i_size;
+
+ pre_smfs_inode(filp->f_dentry->d_inode, cache_inode);
+
+ SMFS_PRE_HOOK(filp->f_dentry->d_inode, HOOK_WRITE, &msg);
+
+ if (ppos != &(filp->f_pos)) {
+ cache_ppos = &msg.pos;
+ } else {
+ cache_ppos = &sfi->c_file->f_pos;
+ }
+
+ *cache_ppos = *ppos;
+
+ rc = cache_inode->i_fop->write(sfi->c_file, buf, count,
+ cache_ppos);
+
+ SMFS_POST_HOOK(filp->f_dentry->d_inode, HOOK_WRITE, &msg, rc);
+
+ post_smfs_inode(filp->f_dentry->d_inode, cache_inode);
+ *ppos = *cache_ppos;
+ duplicate_file(filp, sfi->c_file);
+
+ RETURN(rc);
+}
+
+int smfs_ioctl(struct inode * inode, struct file * filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct inode *cache_inode = I2CI(filp->f_dentry->d_inode);
+ struct smfs_file_info *sfi;
+ ssize_t rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_fop->ioctl);
+
+ sfi = F2SMFI(filp);
+ if (sfi->magic != SMFS_FILE_MAGIC)
+ LBUG();
+
+ pre_smfs_inode(inode, cache_inode);
+
+ rc = cache_inode->i_fop->ioctl(cache_inode, sfi->c_file, cmd, arg);
+
+ post_smfs_inode(inode, cache_inode);
+ duplicate_file(filp, sfi->c_file);
+
+ RETURN(rc);
+}
+
+static ssize_t smfs_read(struct file *filp, char *buf,
+ size_t count, loff_t *ppos)
+{
+ struct inode *cache_inode = I2CI(filp->f_dentry->d_inode);
+ struct smfs_file_info *sfi;
+ loff_t tmp_ppos;
+ loff_t *cache_ppos = NULL;
+ ssize_t rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_fop->read);
+
+ sfi = F2SMFI(filp);
+ if (sfi->magic != SMFS_FILE_MAGIC)
+ LBUG();
+
+ if (ppos != &(filp->f_pos)) {
+ cache_ppos = &tmp_ppos;
+ } else {
+ cache_ppos = &sfi->c_file->f_pos;
+ }
+ *cache_ppos = *ppos;
+
+ pre_smfs_inode(filp->f_dentry->d_inode, cache_inode);
+
+ rc = cache_inode->i_fop->read(sfi->c_file, buf, count, cache_ppos);
+
+ *ppos = *cache_ppos;
+ post_smfs_inode(filp->f_dentry->d_inode, cache_inode);
+ duplicate_file(filp, sfi->c_file);
+
+ RETURN(rc);
+}
+
+static loff_t smfs_llseek(struct file *file, loff_t offset, int origin)
+{
+ struct inode *cache_inode = I2CI(file->f_dentry->d_inode);
+ struct smfs_file_info *sfi;
+ ssize_t rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_fop->llseek);
+
+ sfi = F2SMFI(file);
+ if (sfi->magic != SMFS_FILE_MAGIC)
+ LBUG();
+
+ pre_smfs_inode(file->f_dentry->d_inode, cache_inode);
+
+ rc = cache_inode->i_fop->llseek(sfi->c_file, offset, origin);
+
+ post_smfs_inode(file->f_dentry->d_inode, cache_inode);
+ duplicate_file(file, sfi->c_file);
+
+ RETURN(rc);
+}
+
+static int smfs_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ struct inode *inode = file->f_dentry->d_inode;
+ struct smfs_file_info *sfi;
+ struct inode *cache_inode = I2CI(inode);
+ int rc = 0;
+ ENTRY;
+
+ LASSERT(cache_inode);
+
+ sfi = F2SMFI(file);
+ if (sfi->magic != SMFS_FILE_MAGIC)
+ LBUG();
+
+ if (cache_inode->i_mapping == &cache_inode->i_data)
+ inode->i_mapping = cache_inode->i_mapping;
+
+ pre_smfs_inode(inode, cache_inode);
+
+ rc = cache_inode->i_fop->mmap(sfi->c_file, vma);
+
+ post_smfs_inode(inode, cache_inode);
+ duplicate_file(file, sfi->c_file);
+
+ RETURN(rc);
+}
+
+static int smfs_init_cache_file(struct inode *inode, struct file *filp)
+{
+ struct smfs_file_info *sfi = NULL;
+ struct file *cache_filp = NULL;
+ struct dentry *cache_dentry = NULL;
+ int rc = 0;
+ ENTRY;
+
+ OBD_ALLOC(sfi, sizeof(struct smfs_file_info));
+ if (!sfi)
+ RETURN(-ENOMEM);
+
+ cache_filp = get_empty_filp();
+ if (!cache_filp) {
+ rc = -ENOMEM;
+ goto err_exit;
+ }
+
+ sfi->magic = SMFS_FILE_MAGIC;
+
+ cache_dentry = pre_smfs_dentry(NULL, I2CI(inode), filp->f_dentry);
+ if (!cache_dentry) {
+ rc = -ENOMEM;
+ goto err_exit;
+ }
+
+ cache_filp->f_vfsmnt = filp->f_vfsmnt;
+ cache_filp->f_dentry = cache_dentry;
+ duplicate_file(cache_filp, filp);
+ sfi->c_file = cache_filp;
+
+ if (filp->private_data != NULL)
+ LBUG();
+
+ filp->private_data = sfi;
+
+ RETURN(0);
+err_exit:
+ if (sfi)
+ OBD_FREE(sfi, sizeof(struct smfs_file_info));
+ if (cache_filp)
+ put_filp(cache_filp);
+ RETURN(rc);
+}
+
+static int smfs_cleanup_cache_file(struct file *filp)
+{
+ struct smfs_file_info *sfi = NULL;
+
+ ENTRY;
+
+ if (!filp)
+ RETURN(0);
+
+ sfi = F2SMFI(filp);
+
+ post_smfs_dentry(sfi->c_file->f_dentry);
+
+ put_filp(sfi->c_file);
+
+ OBD_FREE(sfi, sizeof(struct smfs_file_info));
+
+ filp->private_data = NULL;
+
+ RETURN(0);
+}
+
+int smfs_open(struct inode *inode, struct file *filp)
+{
+ struct inode *cache_inode = I2CI(inode);
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+
+ if ((rc = smfs_init_cache_file(inode, filp)))
+ RETURN(rc);
+ //it possible that backstore fs has no open(),
+ //but we need it to init cache filp
+ if (cache_inode->i_fop->open) {
+ rc = cache_inode->i_fop->open(cache_inode, F2CF(filp));
+ duplicate_file(filp, F2CF(filp));
+ }
+
+ RETURN(rc);
+}
+
+int smfs_release(struct inode *inode, struct file *filp)
+{
+ struct inode *cache_inode = I2CI(inode);
+ struct file *cache_file = NULL;
+ struct smfs_file_info *sfi = NULL;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+
+ if (filp) {
+ sfi = F2SMFI(filp);
+ if (sfi->magic != SMFS_FILE_MAGIC)
+ LBUG();
+ cache_file = sfi->c_file;
+ }
+
+ if (cache_inode->i_fop->release)
+ rc = cache_inode->i_fop->release(cache_inode, cache_file);
+
+ post_smfs_inode(inode, cache_inode);
+
+ smfs_cleanup_cache_file(filp);
+
+ RETURN(rc);
+}
+
+int smfs_fsync(struct file *file, struct dentry *dentry, int datasync)
+{
+ struct smfs_file_info *sfi = NULL;
+ struct dentry *cache_dentry = NULL;
+ struct file *cache_file = NULL;
+ struct inode *cache_inode = I2CI(dentry->d_inode);
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_fop->fsync);
+
+ cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
+ if (!cache_dentry)
+ RETURN(-ENOMEM);
+
+ if (file) {
+ sfi = F2SMFI(file);
+ if (sfi->magic != SMFS_FILE_MAGIC)
+ LBUG();
+ cache_file = sfi->c_file;
+ }
+
+ pre_smfs_inode(dentry->d_inode, cache_inode);
+
+ rc = cache_inode->i_fop->fsync(cache_file,
+ cache_dentry, datasync);
+
+ post_smfs_inode(dentry->d_inode, cache_inode);
+ duplicate_file(file, cache_file);
+ post_smfs_dentry(cache_dentry);
+
+ RETURN(rc);
+}
-struct address_space_operations smfs_file_aops = {
-};
-
struct file_operations smfs_file_fops = {
+ llseek: smfs_llseek,
+ read: smfs_read,
+ write: smfs_write,
+ ioctl: smfs_ioctl,
+ mmap: smfs_mmap,
+ open: smfs_open,
+ release: smfs_release,
+ fsync: smfs_fsync,
};
-
+
+static void smfs_truncate(struct inode *inode)
+{
+ struct inode *cache_inode = I2CI(inode);
+
+ if (!cache_inode || !cache_inode->i_op->truncate)
+ return;
+
+ pre_smfs_inode(inode, cache_inode);
+
+ cache_inode->i_op->truncate(cache_inode);
+
+ post_smfs_inode(inode, cache_inode);
+
+ return;
+}
+
+int smfs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *cache_inode = I2CI(dentry->d_inode);
+ struct dentry *cache_dentry;
+ void *handle = NULL;
+ int rc = 0;
+ struct hook_setattr_msg msg = {
+ .dentry = dentry,
+ .attr = attr
+ };
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_op->setattr);
+
+ cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
+ if (!cache_dentry)
+ RETURN(-ENOMEM);
+
+ handle = smfs_trans_start(dentry->d_inode, FSFILT_OP_SETATTR, NULL);
+ if (IS_ERR(handle) ) {
+ rc = -ENOSPC;
+ goto exit;
+ }
+
+ pre_smfs_inode(dentry->d_inode, cache_inode);
+
+ SMFS_PRE_HOOK(dentry->d_inode, HOOK_SETATTR, &msg);
+
+ rc = cache_inode->i_op->setattr(cache_dentry, attr);
+
+ SMFS_POST_HOOK(dentry->d_inode, HOOK_SETATTR, &msg, rc);
+
+ post_smfs_inode(dentry->d_inode, cache_inode);
+ smfs_trans_commit(dentry->d_inode, handle, 0);
+exit:
+ post_smfs_dentry(cache_dentry);
+ RETURN(rc);
+}
+
+int smfs_setxattr(struct dentry *dentry, const char *name, const void *value,
+ size_t size, int flags)
+{
+ struct inode *cache_inode = I2CI(dentry->d_inode);
+ struct dentry *cache_dentry = NULL;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_op->setxattr);
+
+ cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
+ if (!cache_dentry)
+ RETURN(-ENOMEM);
+
+ pre_smfs_inode(dentry->d_inode, cache_inode);
+
+ rc = cache_inode->i_op->setxattr(cache_dentry, name, value,
+ size, flags);
+
+ post_smfs_inode(dentry->d_inode, cache_inode);
+ post_smfs_dentry(cache_dentry);
+
+ RETURN(rc);
+}
+
+int smfs_getxattr(struct dentry *dentry, const char *name, void *buffer,
+ size_t size)
+{
+ struct inode *cache_inode = I2CI(dentry->d_inode);
+ struct dentry *cache_dentry;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_op->getxattr);
+
+ cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
+ if (!cache_dentry)
+ RETURN(-ENOMEM);
+
+ pre_smfs_inode(dentry->d_inode, cache_inode);
+
+ rc = cache_inode->i_op->getxattr(cache_dentry, name, buffer,
+ size);
+
+ post_smfs_inode(dentry->d_inode, cache_inode);
+ post_smfs_dentry(cache_dentry);
+
+ RETURN(rc);
+}
+
+ssize_t smfs_listxattr(struct dentry *dentry, char *buffer, size_t size)
+{
+ struct inode *cache_inode = I2CI(dentry->d_inode);
+ struct dentry *cache_dentry;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_op->listxattr);
+
+ cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
+ if (!cache_dentry)
+ RETURN(-ENOMEM);
+
+ pre_smfs_inode(dentry->d_inode, cache_inode);
+
+ rc = cache_inode->i_op->listxattr(cache_dentry, buffer, size);
+
+ post_smfs_inode(dentry->d_inode, cache_inode);
+ post_smfs_dentry(cache_dentry);
+
+ RETURN(rc);
+}
+
+int smfs_removexattr(struct dentry *dentry, const char *name)
+{
+ struct inode *cache_inode = I2CI(dentry->d_inode);
+ struct dentry *cache_dentry;
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_op->removexattr);
+
+ cache_dentry = pre_smfs_dentry(NULL, cache_inode, dentry);
+ if (!cache_dentry)
+ RETURN(-ENOMEM);
+
+ pre_smfs_inode(dentry->d_inode, cache_inode);
+
+ rc = cache_inode->i_op->removexattr(cache_dentry, name);
+
+ post_smfs_inode(dentry->d_inode, cache_inode);
+ post_smfs_dentry(cache_dentry);
+
+ RETURN(rc);
+}
+
+int smfs_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+ struct inode *cache_inode = I2CI(inode);
+ int rc = 0;
+
+ ENTRY;
+
+ LASSERT(cache_inode);
+ LASSERT(cache_inode->i_op->permission);
+
+ pre_smfs_inode(inode, cache_inode);
+
+ rc = cache_inode->i_op->permission(cache_inode, mask, nd);
+
+ post_smfs_inode(inode, cache_inode);
+
+ RETURN(rc);
+}
+
struct inode_operations smfs_file_iops = {
+ .truncate = smfs_truncate, /* BKL held */
+ .setattr = smfs_setattr, /* BKL held */
+ .setxattr = smfs_setxattr,
+ .getxattr = smfs_getxattr,
+ .listxattr = smfs_listxattr,
+ .removexattr = smfs_removexattr,
+ .permission = smfs_permission,
+};
+
+struct inode_operations smfs_special_iops = {
+ .setattr = smfs_setattr, /* BKL held */
+ .setxattr = smfs_setxattr,
+ .getxattr = smfs_getxattr,
+ .listxattr = smfs_listxattr,
+ .removexattr = smfs_removexattr,
+ .permission = smfs_permission,
};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff