-/*
- * dir.c
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * 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_SNAP
+
+#define DEBUG_SUBSYSTEM S_SM
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/unistd.h>
+#include <linux/smp_lock.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"
-#include "smfs_internal.h"
+#define NAME_ALLOC_LEN(len) ((len+16) & ~15)
-static void d_unalloc(struct dentry *dentry)
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static int smfs_create(struct inode *dir, struct dentry *dentry,
+ int mode)
+#else
+static int smfs_create(struct inode *dir, struct dentry *dentry,
+ int mode, struct nameidata *nd)
+#endif
{
- if (dentry) {
- list_del(&dentry->d_hash);
- INIT_LIST_HEAD(&dentry->d_hash);
- dput(dentry);
- }
+ struct inode *inode = NULL;
+ struct inode *cache_dir = NULL;
+ struct dentry *cache_dentry = NULL;
+ struct dentry *cache_parent = NULL;
+ void *handle = NULL;
+ int rc = 0;
+
+ ENTRY;
+
+ cache_dir = I2CI(dir);
+ if (!cache_dir)
+ RETURN(-ENOENT);
+
+ handle = smfs_trans_start(dir, FSFILT_OP_CREATE, NULL);
+ if (IS_ERR(handle))
+ RETURN(-ENOSPC);
+
+ lock_kernel();
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_CREATE, handle,
+ PRE_HOOK, rc, exit);
+
+ cache_parent = pre_smfs_dentry(NULL, cache_dir, dentry);
+ cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+
+ if (!cache_dentry || !cache_parent)
+ GOTO(exit, rc = -ENOMEM);
+
+ pre_smfs_inode(dir, cache_dir);
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ if (cache_dir && cache_dir->i_op->create)
+ rc = cache_dir->i_op->create(cache_dir, cache_dentry,
+ mode);
+#else
+ if (cache_dir && cache_dir->i_op->create)
+ rc = cache_dir->i_op->create(cache_dir, cache_dentry,
+ mode, nd);
+#endif
+ if (rc)
+ GOTO(exit, rc);
+
+ SMFS_GET_INODE(dir->i_sb, cache_dentry->d_inode, dir, inode,
+ rc, exit);
+
+ d_instantiate(dentry, inode);
+ post_smfs_inode(dir, cache_dir);
+
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_CREATE, handle,
+ POST_HOOK, rc, exit);
+exit:
+ unlock_kernel();
+ post_smfs_dentry(cache_dentry);
+ post_smfs_dentry(cache_parent);
+ smfs_trans_commit(dir, handle, 0);
+ RETURN(rc);
}
-static struct inode *sm_create_inode(struct super_block *sb,
- struct inode *cache_inode)
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static struct dentry *smfs_lookup(struct inode *dir, struct dentry *dentry)
+#else
+static struct dentry *smfs_lookup(struct inode *dir, struct dentry *dentry,
+ struct nameidata *nd)
+#endif
{
- struct inode *inode;
-
- inode = new_inode(sb);
- if (inode) {
- /*FIXME there are still some
- * other attributes need to
- * duplicated*/
- inode->i_ino = cache_inode->i_ino;
- inode->i_mode = cache_inode->i_mode;
- }
-
- return inode;
+ struct inode *cache_dir;
+ struct inode *cache_inode;
+ struct inode *inode = NULL;
+ struct dentry *cache_dentry = NULL;
+ struct dentry *cache_parent = NULL;
+ struct dentry *rc = NULL;
+ void *handle = NULL;
+ int rc2 = 0;
+
+ ENTRY;
+
+ if (!(cache_dir = I2CI(dir)))
+ RETURN(ERR_PTR(-ENOENT));
+
+ /* preparing artificial backing fs dentries. */
+ cache_parent = pre_smfs_dentry(NULL, cache_dir, dentry->d_parent);
+ cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+
+ if (!cache_dentry || !cache_parent)
+ GOTO(exit, rc = ERR_PTR(-ENOMEM));
+
+ if (!cache_dir && cache_dir->i_op->lookup)
+ GOTO(exit, rc = ERR_PTR(-ENOENT));
+
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_LOOKUP, handle,
+ PRE_HOOK, rc2, exit);
+
+ /* perform lookup in backing fs. */
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+ rc = cache_dir->i_op->lookup(cache_dir, cache_dentry);
+#else
+ rc = cache_dir->i_op->lookup(cache_dir, cache_dentry, nd);
+#endif
+ if (rc && IS_ERR(rc))
+ GOTO(exit, rc);
+
+ if ((cache_inode = rc ? rc->d_inode : cache_dentry->d_inode)) {
+ if (IS_ERR(cache_inode)) {
+ dentry->d_inode = cache_inode;
+ GOTO(exit, rc = NULL);
+ }
+ SMFS_GET_INODE(dir->i_sb, cache_inode, dir, inode, rc2, exit);
+ }
+
+ d_add(dentry, inode);
+ rc = NULL;
+
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_LOOKUP, handle, POST_HOOK, rc2,
+ exit);
+exit:
+ if (rc2 < 0)
+ rc = ERR_PTR(rc2);
+ post_smfs_dentry(cache_dentry);
+ post_smfs_dentry(cache_parent);
+ smfs_trans_commit(dir, handle, 0);
+ RETURN(rc);
}
-
-static void prepare_parent_dentry(struct dentry *dentry, struct inode *inode)
+
+static int smfs_link(struct dentry *old_dentry,
+ struct inode *dir, struct dentry *dentry)
{
- atomic_set(&dentry->d_count, 1);
- dentry->d_vfs_flags = 0;
- dentry->d_flags = 0;
- dentry->d_inode = inode;
- dentry->d_op = NULL;
- dentry->d_fsdata = NULL;
- dentry->d_mounted = 0;
- INIT_LIST_HEAD(&dentry->d_hash);
- INIT_LIST_HEAD(&dentry->d_lru);
- INIT_LIST_HEAD(&dentry->d_subdirs);
- INIT_LIST_HEAD(&dentry->d_alias);
+ struct inode *cache_old_inode = NULL;
+ struct inode *cache_dir = I2CI(dir);
+ struct inode *inode = NULL;
+ struct dentry *cache_dentry = NULL;
+ struct dentry *cache_old_dentry = NULL;
+ struct dentry *cache_parent = NULL;
+ void *handle = NULL;
+ int rc = 0;
+
+ inode = old_dentry->d_inode;
+ cache_old_inode = I2CI(inode);
+
+ handle = smfs_trans_start(dir, FSFILT_OP_LINK, NULL);
+ if (IS_ERR(handle))
+ RETURN(-ENOSPC);
+
+ lock_kernel();
+ SMFS_HOOK(dir, old_dentry, NULL, NULL, HOOK_LINK, handle,
+ PRE_HOOK, rc, exit);
+
+ cache_parent = pre_smfs_dentry(NULL, cache_dir, dentry);
+ cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+
+ if (!cache_parent || !cache_dentry)
+ GOTO(exit, rc = -ENOMEM);
+
+ cache_old_dentry = pre_smfs_dentry(NULL, cache_old_inode,
+ old_dentry);
+ if (!cache_old_dentry)
+ GOTO(exit, rc = -ENOMEM);
+
+ pre_smfs_inode(dir, cache_dir);
+ pre_smfs_inode(inode, cache_old_dentry->d_inode);
+
+ if (cache_dir->i_op->link)
+ rc = cache_dir->i_op->link(cache_old_dentry, cache_dir,
+ cache_dentry);
+ if (rc)
+ GOTO(exit, rc);
+
+ atomic_inc(&inode->i_count);
+ post_smfs_inode(inode, cache_old_dentry->d_inode);
+ d_instantiate(dentry, inode);
+ post_smfs_inode(dir, cache_dir);
+
+ SMFS_HOOK(dir, old_dentry, dentry, NULL, HOOK_LINK, handle,
+ POST_HOOK, rc, exit);
+exit:
+ unlock_kernel();
+ post_smfs_dentry(cache_dentry);
+ post_smfs_dentry(cache_parent);
+ post_smfs_dentry(cache_old_dentry);
+ smfs_trans_commit(dir, handle, 0);
+ RETURN(rc);
}
-static int smfs_create(struct inode *dir,
- struct dentry *dentry,
- int mode)
+static int smfs_unlink(struct inode * dir,
+ struct dentry *dentry)
{
- struct inode *cache_dir;
- struct inode *cache_inode, *inode;
- struct dentry tmp;
- struct dentry *cache_dentry;
- int rc;
-
- ENTRY;
-
- cache_dir = I2CI(dir);
+ struct inode *cache_dir = I2CI(dir);
+ struct inode *cache_inode = I2CI(dentry->d_inode);
+ struct dentry *cache_dentry;
+ struct dentry *cache_parent;
+ void *handle = NULL;
+ int rc = 0;
+ int mode = 0;
+
+ if (!cache_dir || !cache_inode)
+ RETURN(-ENOENT);
+
+ handle = smfs_trans_start(dir, FSFILT_OP_UNLINK, NULL);
+ if (IS_ERR(handle))
+ RETURN(-ENOSPC);
+
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_UNLINK, handle, PRE_HOOK, rc,
+ exit);
+
+ cache_parent = pre_smfs_dentry(NULL, cache_dir, dentry);
+ cache_dentry = pre_smfs_dentry(cache_parent, cache_inode, dentry);
+
+ if (!cache_parent || !cache_dentry)
+ GOTO(exit, rc = -ENOMEM);
+
+ lock_kernel();
+ pre_smfs_inode(dir, cache_dir);
+ pre_smfs_inode(dentry->d_inode, cache_inode);
+ if (cache_dir->i_op->unlink)
+ rc = cache_dir->i_op->unlink(cache_dir, cache_dentry);
+ post_smfs_inode(dentry->d_inode, cache_dentry->d_inode);
+ post_smfs_inode(dir, cache_dir);
+ unlock_kernel();
+
+ SMFS_HOOK(dir, dentry, &mode, NULL, HOOK_UNLINK, handle, POST_HOOK,
+ rc, exit);
+exit:
+ post_smfs_dentry(cache_dentry);
+ post_smfs_dentry(cache_parent);
+ smfs_trans_commit(dir, handle, 0);
+ RETURN(rc);
+}
+
+static int smfs_symlink(struct inode *dir, struct dentry *dentry,
+ const char *symname)
+{
+ struct inode *cache_dir = I2CI(dir);
+ struct inode *inode = NULL;
+ struct dentry *cache_dentry;
+ struct dentry *cache_parent;
+ void *handle = NULL;
+ int rc = 0, tgt_len;
+
if (!cache_dir)
RETURN(-ENOENT);
+
+ handle = smfs_trans_start(dir, FSFILT_OP_SYMLINK, NULL);
+ if (IS_ERR(handle))
+ RETURN(-ENOSPC);
+
+ lock_kernel();
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_SYMLINK, handle, PRE_HOOK, rc,
+ exit);
+
+ cache_parent = pre_smfs_dentry(NULL, cache_dir, dentry);
+ cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+
+ if (!cache_parent || !cache_dentry)
+ GOTO(exit, rc = -ENOMEM);
- prepare_parent_dentry(&tmp, cache_dir);
- cache_dentry = d_alloc(&tmp, &dentry->d_name);
+ pre_smfs_inode(dir, cache_dir);
+ if (cache_dir->i_op->symlink)
+ rc = cache_dir->i_op->symlink(cache_dir, cache_dentry, symname);
+
+ post_smfs_inode(dir, cache_dir);
- if (!cache_dentry)
+ SMFS_GET_INODE(dir->i_sb, cache_dentry->d_inode, dir, inode, rc, exit);
+ if (inode)
+ d_instantiate(dentry, inode);
+ else
+ rc = -ENOENT;
+
+ tgt_len = strlen(symname) + 1;
+
+ SMFS_HOOK(dir, dentry, (char *)symname, &tgt_len, HOOK_SYMLINK, handle,
+ POST_HOOK, rc, exit);
+exit:
+ unlock_kernel();
+ post_smfs_dentry(cache_dentry);
+ post_smfs_dentry(cache_parent);
+ smfs_trans_commit(dir, handle, 0);
+ RETURN(rc);
+}
+
+static int smfs_mkdir(struct inode *dir, struct dentry *dentry,
+ int mode)
+{
+ struct inode *cache_dir = I2CI(dir);
+ struct inode *inode = NULL;
+ struct dentry *cache_dentry;
+ struct dentry *cache_parent;
+ void *handle = NULL;
+ int rc = 0;
+
+ if (!cache_dir)
RETURN(-ENOENT);
-
- if(cache_dir && cache_dir->i_op->create)
- rc = cache_dir->i_op->create(cache_dir, cache_dentry, mode);
- if (rc)
- GOTO(exit, rc);
-
- cache_inode = cache_dentry->d_inode;
- inode = sm_create_inode(dir->i_sb, cache_inode);
-
- if (!inode)
- GOTO(exit, rc);
-
- sm_setup_inode_ops(cache_inode, inode);
+
+ handle = smfs_trans_start(dir, FSFILT_OP_MKDIR, NULL);
+ if (IS_ERR(handle))
+ RETURN(-ENOSPC);
+
+ lock_kernel();
+
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_MKDIR, handle, PRE_HOOK, rc,
+ exit);
+
+ cache_parent = pre_smfs_dentry(NULL, cache_dir, dentry);
+ cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+
+ if (!cache_parent || !cache_dentry)
+ GOTO(exit, rc = -ENOMEM);
+
+ pre_smfs_inode(dir, cache_dir);
+
+ if (cache_dir->i_op->mkdir)
+ rc = cache_dir->i_op->mkdir(cache_dir, cache_dentry, mode);
+
+ if (rc)
+ GOTO(exit, rc);
+
+ SMFS_GET_INODE(dir->i_sb, cache_dentry->d_inode, dir, inode, rc, exit);
+ d_instantiate(dentry, inode);
+ post_smfs_inode(dir, cache_dir);
+
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_MKDIR, handle, POST_HOOK, rc,
+ exit);
exit:
- d_unalloc(cache_dentry);
- RETURN(rc);
+ unlock_kernel();
+ post_smfs_dentry(cache_dentry);
+ post_smfs_dentry(cache_parent);
+ smfs_trans_commit(dir, handle, 0);
+ RETURN(rc);
}
-struct inode_operations smfs_dir_fops = {
- create: smfs_create,
+static int smfs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct inode *cache_dir = I2CI(dir);
+ struct inode *cache_inode = I2CI(dentry->d_inode);
+ struct dentry *cache_dentry = NULL;
+ struct dentry *cache_parent = NULL;
+ void *handle = NULL;
+ int rc = 0, mode = S_IFDIR;
+
+ if (!cache_dir)
+ RETURN(-ENOENT);
+
+ handle = smfs_trans_start(dir, FSFILT_OP_RMDIR, NULL);
+ if (IS_ERR(handle) ) {
+ CERROR("smfs_do_mkdir: no space for transaction\n");
+ RETURN(-ENOSPC);
+ }
+
+ lock_kernel();
+
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_RMDIR, handle, PRE_HOOK, rc,
+ exit);
+
+ cache_parent = pre_smfs_dentry(NULL, cache_dir, dentry);
+ cache_dentry = pre_smfs_dentry(cache_parent, cache_inode, dentry);
+
+ if (!cache_parent || !cache_dentry)
+ GOTO(exit, rc = -ENOMEM);
+
+ pre_smfs_inode(dir, cache_dir);
+ pre_smfs_inode(dentry->d_inode, cache_dentry->d_inode);
+ if (cache_dir->i_op->rmdir)
+ rc = cache_dir->i_op->rmdir(cache_dir, cache_dentry);
+
+ post_smfs_inode(dir, cache_dir);
+ post_smfs_inode(dentry->d_inode, cache_dentry->d_inode);
+ unlock_kernel();
+
+ SMFS_HOOK(dir, dentry, &mode, NULL, HOOK_RMDIR, handle, POST_HOOK,
+ rc, exit);
+exit:
+ post_smfs_dentry(cache_dentry);
+ post_smfs_dentry(cache_parent);
+ smfs_trans_commit(dir, handle, 0);
+ RETURN(rc);
+}
+
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
+static int smfs_mknod(struct inode *dir, struct dentry *dentry,
+ int mode, int rdev)
+#else
+static int smfs_mknod(struct inode *dir, struct dentry *dentry,
+ int mode, dev_t rdev)
+#endif
+{
+ struct inode *cache_dir = I2CI(dir);
+ struct inode *inode = NULL;
+ struct dentry *cache_dentry = NULL;
+ struct dentry *cache_parent = NULL;
+ void *handle = NULL;
+ int rc = 0;
+
+ if (!cache_dir)
+ RETURN(-ENOENT);
+
+ handle = smfs_trans_start(dir, FSFILT_OP_MKNOD, NULL);
+ if (IS_ERR(handle)) {
+ CERROR("smfs_do_mkdir: no space for transaction\n");
+ RETURN(-ENOSPC);
+ }
+
+ lock_kernel();
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_MKNOD, handle, PRE_HOOK, rc,
+ exit);
+
+ cache_parent = pre_smfs_dentry(NULL, cache_dir, dentry->d_parent);
+ cache_dentry = pre_smfs_dentry(cache_parent, NULL, dentry);
+ if (!cache_parent || !cache_dentry)
+ GOTO(exit, rc = -ENOMEM);
+
+ pre_smfs_inode(dir, cache_dir);
+ pre_smfs_inode(dentry->d_inode, cache_dentry->d_inode);
+
+ if (!cache_dir->i_op->mknod)
+ RETURN(-ENOENT);
+
+ if ((rc = cache_dir->i_op->mknod(cache_dir, cache_dentry,
+ mode, rdev)))
+ GOTO(exit, rc);
+
+ SMFS_GET_INODE(dir->i_sb, cache_dentry->d_inode, dir, inode, rc, exit);
+
+ d_instantiate(dentry, inode);
+
+ pre_smfs_inode(dir, cache_dir);
+ pre_smfs_inode(dentry->d_inode, cache_dentry->d_inode);
+
+ SMFS_HOOK(dir, dentry, NULL, NULL, HOOK_MKNOD, handle, POST_HOOK, rc,
+ exit);
+
+exit:
+ unlock_kernel();
+ post_smfs_dentry(cache_dentry);
+ post_smfs_dentry(cache_parent);
+ smfs_trans_commit(dir, handle, 0);
+ RETURN(rc);
+}
+
+static int smfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir,struct dentry *new_dentry)
+{
+ struct inode *cache_old_dir = I2CI(old_dir);
+ struct inode *cache_new_dir = I2CI(new_dir);
+ struct inode *cache_old_inode = I2CI(old_dentry->d_inode);
+
+ struct inode *cache_new_inode = new_dentry->d_inode ?
+ I2CI(new_dentry->d_inode) : NULL;
+
+ struct dentry *cache_old_dentry = NULL;
+ struct dentry *cache_new_dentry = NULL;
+ struct dentry *cache_new_parent = NULL;
+ struct dentry *cache_old_parent = NULL;
+ void *handle = NULL;
+ int rc = 0;
+
+ if (!cache_old_dir || !cache_new_dir || !cache_old_inode)
+ RETURN(-ENOENT);
+
+ handle = smfs_trans_start(old_dir, FSFILT_OP_RENAME, NULL);
+ if (IS_ERR(handle)) {
+ CERROR("smfs_do_mkdir: no space for transaction\n");
+ RETURN(-ENOSPC);
+ }
+ lock_kernel();
+
+
+ SMFS_HOOK(old_dir, old_dentry, new_dir, new_dentry, HOOK_RENAME,
+ handle, PRE_HOOK, rc, exit);
+
+ cache_old_parent = pre_smfs_dentry(NULL, cache_old_dir, old_dentry);
+
+ cache_old_dentry = pre_smfs_dentry(cache_old_parent, cache_old_inode,
+ old_dentry);
+
+ if (!cache_old_parent || !cache_old_dentry)
+ GOTO(exit, rc = -ENOMEM);
+
+ cache_new_parent = pre_smfs_dentry(NULL, cache_new_dir, new_dentry);
+
+ cache_new_dentry = pre_smfs_dentry(cache_new_parent, cache_new_inode,
+ new_dentry);
+
+ if (!cache_new_parent || !cache_new_dentry)
+ GOTO(exit, rc = -ENOMEM);
+
+ pre_smfs_inode(old_dir, cache_old_dir);
+ pre_smfs_inode(new_dir, cache_new_dir);
+
+ if (cache_old_dir->i_op->rename)
+ rc = cache_old_dir->i_op->rename(cache_old_dir, cache_old_dentry,
+ cache_new_dir, cache_new_dentry);
+
+ post_smfs_inode(old_dir, cache_old_dir);
+ post_smfs_inode(new_dir, cache_new_dir);
+
+ SMFS_HOOK(old_dir, old_dentry, new_dir, new_dentry, HOOK_RENAME, handle,
+ POST_HOOK, rc, exit);
+
+ if (new_dentry->d_inode)
+ post_smfs_inode(new_dentry->d_inode, cache_new_dentry->d_inode);
+exit:
+ unlock_kernel();
+ post_smfs_dentry(cache_old_dentry);
+ post_smfs_dentry(cache_old_parent);
+ post_smfs_dentry(cache_new_dentry);
+ post_smfs_dentry(cache_new_parent);
+ smfs_trans_commit(old_dir, handle, 0);
+ RETURN(rc);
+}
+
+struct inode_operations smfs_dir_iops = {
+ create: smfs_create,
+ lookup: smfs_lookup,
+ link: smfs_link, /* BKL held */
+ unlink: smfs_unlink, /* BKL held */
+ symlink: smfs_symlink, /* BKL held */
+ mkdir: smfs_mkdir, /* BKL held */
+ rmdir: smfs_rmdir, /* BKL held */
+ mknod: smfs_mknod, /* BKL held */
+ rename: smfs_rename, /* BKL held */
+ setxattr: smfs_setxattr, /* BKL held */
+ getxattr: smfs_getxattr, /* BKL held */
+ listxattr: smfs_listxattr, /* BKL held */
+ removexattr: smfs_removexattr, /* BKL held */
};
+static ssize_t smfs_read_dir(struct file *filp, char *buf,
+ size_t size, loff_t *ppos)
+{
+ struct dentry *dentry = filp->f_dentry;
+ struct inode *cache_inode = NULL;
+ struct smfs_file_info *sfi = NULL;
+ loff_t tmp_ppos;
+ loff_t *cache_ppos;
+ int rc = 0;
+
+ cache_inode = I2CI(dentry->d_inode);
+
+ if (!cache_inode)
+ RETURN(-EINVAL);
+
+ sfi = F2SMFI(filp);
+ if (sfi->magic != SMFS_FILE_MAGIC) BUG();
+
+ if (ppos != &(filp->f_pos))
+ cache_ppos = &tmp_ppos;
+ else
+ cache_ppos = &sfi->c_file->f_pos;
+ *cache_ppos = *ppos;
+
+ if (cache_inode->i_fop->read)
+ rc = cache_inode->i_fop->read(sfi->c_file, buf, size,
+ cache_ppos);
+ *ppos = *cache_ppos;
+ duplicate_file(filp, sfi->c_file);
+ RETURN(rc);
+}
+
+static int smfs_readdir(struct file *filp, void *dirent, filldir_t filldir)
+{
+ struct dentry *dentry = filp->f_dentry;
+ struct inode *cache_inode = NULL;
+ struct smfs_file_info *sfi = NULL;
+ int rc = 0;
+
+ cache_inode = I2CI(dentry->d_inode);
+ if (!cache_inode)
+ RETURN(-EINVAL);
+
+ sfi = F2SMFI(filp);
+ if (sfi->magic != SMFS_FILE_MAGIC) BUG();
+
+ SMFS_HOOK(dentry->d_inode, filp, dirent, filldir, HOOK_READDIR, NULL,
+ PRE_HOOK, rc, exit);
+
+ if (cache_inode->i_fop->readdir)
+ rc = cache_inode->i_fop->readdir(sfi->c_file, dirent, filldir);
+
+ SMFS_HOOK(dentry->d_inode, filp, dirent, filldir, HOOK_READDIR, NULL,
+ POST_HOOK, rc, exit);
+
+ duplicate_file(filp, sfi->c_file);
+exit:
+ if (rc > 0)
+ rc = 0;
+ RETURN(rc);
+}
+
+struct file_operations smfs_dir_fops = {
+ .read = smfs_read_dir,
+ .readdir = smfs_readdir, /* BKL held */
+ .ioctl = smfs_ioctl, /* BKL held */
+ .fsync = smfs_fsync, /* BKL held */
+ .open = smfs_open,
+ .release = smfs_release,
+};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff