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[Hackndev-commit] SF.net SVN: hackndev: [890] linux4palm/linux/trunk/fs/unionfs
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From: <z7...@us...> - 2007-02-28 11:36:45
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Revision: 890
http://svn.sourceforge.net/hackndev/?rev=890&view=rev
Author: z72ka
Date: 2007-02-28 03:35:22 -0800 (Wed, 28 Feb 2007)
Log Message:
-----------
Added missing files for unionfs
Added Paths:
-----------
linux4palm/linux/trunk/fs/unionfs/fanout.h
linux4palm/linux/trunk/fs/unionfs/sioq.c
linux4palm/linux/trunk/fs/unionfs/sioq.h
Added: linux4palm/linux/trunk/fs/unionfs/fanout.h
===================================================================
--- linux4palm/linux/trunk/fs/unionfs/fanout.h (rev 0)
+++ linux4palm/linux/trunk/fs/unionfs/fanout.h 2007-02-28 11:35:22 UTC (rev 890)
@@ -0,0 +1,210 @@
+/*
+ * Copyright (c) 2003-2007 Erez Zadok
+ * Copyright (c) 2003-2006 Charles P. Wright
+ * Copyright (c) 2005-2007 Josef 'Jeff' Sipek
+ * Copyright (c) 2005 Arun M. Krishnakumar
+ * Copyright (c) 2004-2006 David P. Quigley
+ * Copyright (c) 2003-2004 Mohammad Nayyer Zubair
+ * Copyright (c) 2003 Puja Gupta
+ * Copyright (c) 2003 Harikesavan Krishnan
+ * Copyright (c) 2003-2007 Stony Brook University
+ * Copyright (c) 2003-2007 The Research Foundation of State University of New York
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef _FANOUT_H_
+#define _FANOUT_H_
+
+/* Inode to private data */
+static inline struct unionfs_inode_info *UNIONFS_I(const struct inode *inode)
+{
+ return container_of(inode, struct unionfs_inode_info, vfs_inode);
+}
+
+#define ibstart(ino) (UNIONFS_I(ino)->bstart)
+#define ibend(ino) (UNIONFS_I(ino)->bend)
+
+/* Superblock to private data */
+#define UNIONFS_SB(super) ((struct unionfs_sb_info *)(super)->s_fs_info)
+#define sbstart(sb) 0
+#define sbend(sb) (UNIONFS_SB(sb)->bend)
+#define sbmax(sb) (UNIONFS_SB(sb)->bend + 1)
+
+/* File to private Data */
+#define UNIONFS_F(file) ((struct unionfs_file_info *)((file)->private_data))
+#define fbstart(file) (UNIONFS_F(file)->bstart)
+#define fbend(file) (UNIONFS_F(file)->bend)
+
+/* File to lower file. */
+static inline struct file *unionfs_lower_file(const struct file *f)
+{
+ return UNIONFS_F(f)->lower_files[fbstart(f)];
+}
+
+static inline struct file *unionfs_lower_file_idx(const struct file *f, int index)
+{
+ return UNIONFS_F(f)->lower_files[index];
+}
+
+static inline void unionfs_set_lower_file_idx(struct file *f, int index, struct file *val)
+{
+ UNIONFS_F(f)->lower_files[index] = val;
+}
+
+static inline void unionfs_set_lower_file(struct file *f, struct file *val)
+{
+ UNIONFS_F(f)->lower_files[fbstart(f)] = val;
+}
+
+/* Inode to lower inode. */
+static inline struct inode *unionfs_lower_inode(const struct inode *i)
+{
+ return UNIONFS_I(i)->lower_inodes[ibstart(i)];
+}
+
+static inline struct inode *unionfs_lower_inode_idx(const struct inode *i, int index)
+{
+ return UNIONFS_I(i)->lower_inodes[index];
+}
+
+static inline void unionfs_set_lower_inode_idx(struct inode *i, int index,
+ struct inode *val)
+{
+ UNIONFS_I(i)->lower_inodes[index] = val;
+}
+
+static inline void unionfs_set_lower_inode(struct inode *i, struct inode *val)
+{
+ UNIONFS_I(i)->lower_inodes[ibstart(i)] = val;
+}
+
+/* Superblock to lower superblock. */
+static inline struct super_block *unionfs_lower_super(const struct super_block *sb)
+{
+ return UNIONFS_SB(sb)->data[sbstart(sb)].sb;
+}
+
+static inline struct super_block *unionfs_lower_super_idx(const struct super_block *sb, int index)
+{
+ return UNIONFS_SB(sb)->data[index].sb;
+}
+
+static inline void unionfs_set_lower_super_idx(struct super_block *sb, int index,
+ struct super_block *val)
+{
+ UNIONFS_SB(sb)->data[index].sb = val;
+}
+
+static inline void unionfs_set_lower_super(struct super_block *sb, struct super_block *val)
+{
+ UNIONFS_SB(sb)->data[sbstart(sb)].sb = val;
+}
+
+/* Branch count macros. */
+static inline int branch_count(const struct super_block *sb, int index)
+{
+ return atomic_read(&UNIONFS_SB(sb)->data[index].sbcount);
+}
+
+static inline void set_branch_count(struct super_block *sb, int index, int val)
+{
+ atomic_set(&UNIONFS_SB(sb)->data[index].sbcount, val);
+}
+
+static inline void branchget(struct super_block *sb, int index)
+{
+ atomic_inc(&UNIONFS_SB(sb)->data[index].sbcount);
+}
+
+static inline void branchput(struct super_block *sb, int index)
+{
+ atomic_dec(&UNIONFS_SB(sb)->data[index].sbcount);
+}
+
+/* Dentry macros */
+static inline struct unionfs_dentry_info *UNIONFS_D(const struct dentry *dent)
+{
+ return dent->d_fsdata;
+}
+
+static inline int dbstart(const struct dentry *dent)
+{
+ return UNIONFS_D(dent)->bstart;
+}
+
+static inline void set_dbstart(struct dentry *dent, int val)
+{
+ UNIONFS_D(dent)->bstart = val;
+}
+
+static inline int dbend(const struct dentry *dent)
+{
+ return UNIONFS_D(dent)->bend;
+}
+
+static inline void set_dbend(struct dentry *dent, int val)
+{
+ UNIONFS_D(dent)->bend = val;
+}
+
+static inline int dbopaque(const struct dentry *dent)
+{
+ return UNIONFS_D(dent)->bopaque;
+}
+
+static inline void set_dbopaque(struct dentry *dent, int val)
+{
+ UNIONFS_D(dent)->bopaque = val;
+}
+
+static inline void unionfs_set_lower_dentry_idx(struct dentry *dent, int index,
+ struct dentry *val)
+{
+ UNIONFS_D(dent)->lower_paths[index].dentry = val;
+}
+
+static inline struct dentry *unionfs_lower_dentry_idx(const struct dentry *dent, int index)
+{
+ return UNIONFS_D(dent)->lower_paths[index].dentry;
+}
+
+static inline struct dentry *unionfs_lower_dentry(const struct dentry *dent)
+{
+ return unionfs_lower_dentry_idx(dent, dbstart(dent));
+}
+
+static inline void unionfs_set_lower_mnt_idx(struct dentry *dent, int index,
+ struct vfsmount *mnt)
+{
+ UNIONFS_D(dent)->lower_paths[index].mnt = mnt;
+}
+
+static inline struct vfsmount *unionfs_lower_mnt_idx(const struct dentry *dent, int index)
+{
+ return UNIONFS_D(dent)->lower_paths[index].mnt;
+}
+
+static inline struct vfsmount *unionfs_lower_mnt(const struct dentry *dent)
+{
+ return unionfs_lower_mnt_idx(dent,dbstart(dent));
+}
+
+/* Macros for locking a dentry. */
+static inline void unionfs_lock_dentry(struct dentry *d)
+{
+ mutex_lock(&UNIONFS_D(d)->lock);
+}
+
+static inline void unionfs_unlock_dentry(struct dentry *d)
+{
+ mutex_unlock(&UNIONFS_D(d)->lock);
+}
+
+static inline void verify_locked(struct dentry *d)
+{
+}
+
+#endif /* _FANOUT_H */
Added: linux4palm/linux/trunk/fs/unionfs/sioq.c
===================================================================
--- linux4palm/linux/trunk/fs/unionfs/sioq.c (rev 0)
+++ linux4palm/linux/trunk/fs/unionfs/sioq.c 2007-02-28 11:35:22 UTC (rev 890)
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2003-2007 Erez Zadok
+ * Copyright (c) 2003-2006 Charles P. Wright
+ * Copyright (c) 2005-2007 Josef 'Jeff' Sipek
+ * Copyright (c) 2005-2006 Junjiro Okajima
+ * Copyright (c) 2005 Arun M. Krishnakumar
+ * Copyright (c) 2004-2006 David P. Quigley
+ * Copyright (c) 2003-2004 Mohammad Nayyer Zubair
+ * Copyright (c) 2003 Puja Gupta
+ * Copyright (c) 2003 Harikesavan Krishnan
+ * Copyright (c) 2003-2007 Stony Brook University
+ * Copyright (c) 2003-2007 The Research Foundation of State University of New York
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include "union.h"
+
+/* Super-user IO work Queue - sometimes we need to perform actions which
+ * would fail due to the unix permissions on the parent directory (e.g.,
+ * rmdir a directory which appears empty, but in reality contains
+ * whiteouts).
+ */
+
+static struct workqueue_struct *superio_workqueue;
+
+int __init init_sioq(void)
+{
+ int err;
+
+ superio_workqueue = create_workqueue("unionfs_siod");
+ if (!IS_ERR(superio_workqueue))
+ return 0;
+
+ err = PTR_ERR(superio_workqueue);
+ printk(KERN_ERR "create_workqueue failed %d\n", err);
+ superio_workqueue = NULL;
+ return err;
+}
+
+void __exit stop_sioq(void)
+{
+ if (superio_workqueue)
+ destroy_workqueue(superio_workqueue);
+}
+
+void run_sioq(work_func_t func, struct sioq_args *args)
+{
+ INIT_WORK(&args->work, func);
+
+ init_completion(&args->comp);
+ while (!queue_work(superio_workqueue, &args->work)) {
+ /* TODO: do accounting if needed */
+ schedule();
+ }
+ wait_for_completion(&args->comp);
+}
+
+void __unionfs_create(struct work_struct *work)
+{
+ struct sioq_args *args = container_of(work, struct sioq_args, work);
+ struct create_args *c = &args->create;
+
+ args->err = vfs_create(c->parent, c->dentry, c->mode, c->nd);
+ complete(&args->comp);
+}
+
+void __unionfs_mkdir(struct work_struct *work)
+{
+ struct sioq_args *args = container_of(work, struct sioq_args, work);
+ struct mkdir_args *m = &args->mkdir;
+
+ args->err = vfs_mkdir(m->parent, m->dentry, m->mode);
+ complete(&args->comp);
+}
+
+void __unionfs_mknod(struct work_struct *work)
+{
+ struct sioq_args *args = container_of(work, struct sioq_args, work);
+ struct mknod_args *m = &args->mknod;
+
+ args->err = vfs_mknod(m->parent, m->dentry, m->mode, m->dev);
+ complete(&args->comp);
+}
+
+void __unionfs_symlink(struct work_struct *work)
+{
+ struct sioq_args *args = container_of(work, struct sioq_args, work);
+ struct symlink_args *s = &args->symlink;
+
+ args->err = vfs_symlink(s->parent, s->dentry, s->symbuf, s->mode);
+ complete(&args->comp);
+}
+
+void __unionfs_unlink(struct work_struct *work)
+{
+ struct sioq_args *args = container_of(work, struct sioq_args, work);
+ struct unlink_args *u = &args->unlink;
+
+ args->err = vfs_unlink(u->parent, u->dentry);
+ complete(&args->comp);
+}
+
+void __delete_whiteouts(struct work_struct *work)
+{
+ struct sioq_args *args = container_of(work, struct sioq_args, work);
+ struct deletewh_args *d = &args->deletewh;
+
+ args->err = do_delete_whiteouts(d->dentry, d->bindex, d->namelist);
+ complete(&args->comp);
+}
+
+void __is_opaque_dir(struct work_struct *work)
+{
+ struct sioq_args *args = container_of(work, struct sioq_args, work);
+
+ args->ret = lookup_one_len(UNIONFS_DIR_OPAQUE, args->is_opaque.dentry,
+ sizeof(UNIONFS_DIR_OPAQUE) - 1);
+ complete(&args->comp);
+}
+
Added: linux4palm/linux/trunk/fs/unionfs/sioq.h
===================================================================
--- linux4palm/linux/trunk/fs/unionfs/sioq.h (rev 0)
+++ linux4palm/linux/trunk/fs/unionfs/sioq.h 2007-02-28 11:35:22 UTC (rev 890)
@@ -0,0 +1,78 @@
+#ifndef _SIOQ_H
+#define _SIOQ_H
+
+struct deletewh_args {
+ struct unionfs_dir_state *namelist;
+ struct dentry *dentry;
+ int bindex;
+};
+
+struct is_opaque_args {
+ struct dentry *dentry;
+};
+
+struct create_args {
+ struct inode *parent;
+ struct dentry *dentry;
+ umode_t mode;
+ struct nameidata *nd;
+};
+
+struct mkdir_args {
+ struct inode *parent;
+ struct dentry *dentry;
+ umode_t mode;
+};
+
+struct mknod_args {
+ struct inode *parent;
+ struct dentry *dentry;
+ umode_t mode;
+ dev_t dev;
+};
+
+struct symlink_args {
+ struct inode *parent;
+ struct dentry *dentry;
+ char *symbuf;
+ umode_t mode;
+};
+
+struct unlink_args {
+ struct inode *parent;
+ struct dentry *dentry;
+};
+
+
+struct sioq_args {
+ struct completion comp;
+ struct work_struct work;
+ int err;
+ void *ret;
+
+ union {
+ struct deletewh_args deletewh;
+ struct is_opaque_args is_opaque;
+ struct create_args create;
+ struct mkdir_args mkdir;
+ struct mknod_args mknod;
+ struct symlink_args symlink;
+ struct unlink_args unlink;
+ };
+};
+
+extern int __init init_sioq(void);
+extern __exit void stop_sioq(void);
+extern void run_sioq(work_func_t func, struct sioq_args *args);
+
+/* Extern definitions for our privlege escalation helpers */
+extern void __unionfs_create(struct work_struct *work);
+extern void __unionfs_mkdir(struct work_struct *work);
+extern void __unionfs_mknod(struct work_struct *work);
+extern void __unionfs_symlink(struct work_struct *work);
+extern void __unionfs_unlink(struct work_struct *work);
+extern void __delete_whiteouts(struct work_struct *work);
+extern void __is_opaque_dir(struct work_struct *work);
+
+#endif /* _SIOQ_H */
+
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