[kernel] revert 15922 - add back 2.6.29 kernel support

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16127 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 143 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/patches-2.6.29/210-mini_fo_2.6.25_fixes.patch b/target/linux/generic-2.6/patches-2.6.29/210-mini_fo_2.6.25_fixes.patch
new file mode 100644
index 0000000000..d71e3b6faa
--- /dev/null
+++ b/target/linux/generic-2.6/patches-2.6.29/210-mini_fo_2.6.25_fixes.patch
@@ -0,0 +1,143 @@
+--- a/fs/mini_fo/main.c
++++ b/fs/mini_fo/main.c
+@@ -79,6 +79,7 @@ mini_fo_tri_interpose(dentry_t *hidden_d
+ 	 * of the new inode's fields
+ 	 */
+ 
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
+ 	/*
+ 	 * original: inode = iget(sb, hidden_inode->i_ino);
+ 	 */
+@@ -87,6 +88,13 @@ mini_fo_tri_interpose(dentry_t *hidden_d
+ 		err = -EACCES;		/* should be impossible??? */
+ 		goto out;
+ 	}
++#else
++	inode = mini_fo_iget(sb, iunique(sb, 25));
++	if (IS_ERR(inode)) {
++		err = PTR_ERR(inode);
++		goto out;
++	}
++#endif
+ 
+ 	/*
+ 	 * interpose the inode if not already interposed
+@@ -184,9 +192,9 @@ mini_fo_parse_options(super_block_t *sb,
+ 				hidden_root = ERR_PTR(err);
+ 				goto out;
+ 			}
+-			hidden_root = nd.dentry;
+-			stopd(sb)->base_dir_dentry = nd.dentry;
+-			stopd(sb)->hidden_mnt = nd.mnt;
++			hidden_root = nd_get_dentry(&nd);
++			stopd(sb)->base_dir_dentry = nd_get_dentry(&nd);
++			stopd(sb)->hidden_mnt = nd_get_mnt(&nd);
+ 
+ 		} else if(!strncmp("sto=", options, 4)) {
+ 			/* parse the storage dir */
+@@ -204,9 +212,9 @@ mini_fo_parse_options(super_block_t *sb,
+ 				hidden_root2 = ERR_PTR(err);
+ 				goto out;
+ 			}
+-			hidden_root2 = nd2.dentry;
+-			stopd(sb)->storage_dir_dentry = nd2.dentry;
+-			stopd(sb)->hidden_mnt2 = nd2.mnt;
++			hidden_root2 = nd_get_dentry(&nd2);
++			stopd(sb)->storage_dir_dentry = nd_get_dentry(&nd2);
++			stopd(sb)->hidden_mnt2 = nd_get_mnt(&nd2);
+ 			stohs2(sb) = hidden_root2->d_sb;
+ 
+ 			/* validate storage dir, this is done in
+--- a/fs/mini_fo/mini_fo.h
++++ b/fs/mini_fo/mini_fo.h
+@@ -302,6 +302,10 @@ extern int mini_fo_tri_interpose(dentry_
+ extern int mini_fo_cp_cont(dentry_t *tgt_dentry, struct vfsmount *tgt_mnt,
+ 			   dentry_t *src_dentry, struct vfsmount *src_mnt);
+ 
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)
++extern struct inode *mini_fo_iget(struct super_block *sb, unsigned long ino);
++#endif
++
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0)
+ extern int mini_fo_create(inode_t *dir, dentry_t *dentry, int mode, struct nameidata *nd);
+ 
+@@ -501,6 +505,29 @@ static inline void double_unlock(struct 
+ #endif  /* if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,0) */
+ #endif /* __KERNEL__ */
+ 
++
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)
++static inline dentry_t *nd_get_dentry(struct nameidata *nd)
++{
++	return (nd->path.dentry);
++}
++
++static inline struct vfsmount *nd_get_mnt(struct nameidata *nd)
++{
++	return (nd->path.mnt);
++}
++#else
++static inline dentry_t *nd_get_dentry(struct nameidata *nd)
++{
++	return (nd->dentry);
++}
++
++static inline struct vfsmount *nd_get_mnt(struct nameidata *nd)
++{
++	return (nd->mnt);
++}
++#endif
++
+ /*
+  * Definitions for user and kernel code
+  */
+--- a/fs/mini_fo/super.c
++++ b/fs/mini_fo/super.c
+@@ -262,10 +262,31 @@ mini_fo_umount_begin(super_block_t *sb)
+ }
+ #endif
+ 
++#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25)
++struct inode *
++mini_fo_iget(struct super_block *sb, unsigned long ino)
++{
++	struct inode *inode;
++
++	inode = iget_locked(sb, ino);
++	if (!inode)
++		return ERR_PTR(-ENOMEM);
++
++	if (!(inode->i_state & I_NEW))
++		return inode;
++
++	mini_fo_read_inode(inode);
++
++	unlock_new_inode(inode);
++	return inode;
++}
++#endif /* if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25) */
+ 
+ struct super_operations mini_fo_sops =
+ {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)
+ 	read_inode:		mini_fo_read_inode,
++#endif
+ #if defined(FIST_DEBUG) || defined(FIST_FILTER_SCA)
+ 	write_inode:	mini_fo_write_inode,
+ #endif /* defined(FIST_DEBUG) || defined(FIST_FILTER_SCA) */
+--- a/fs/mini_fo/aux.c
++++ b/fs/mini_fo/aux.c
+@@ -164,11 +164,11 @@ dentry_t *bpath_walk(super_block_t *sb, 
+ 	err = vfs_path_lookup(mnt->mnt_root, mnt, bpath+1, 0, &nd);
+ 
+ 	/* validate */
+-	if (err || !nd.dentry || !nd.dentry->d_inode) {
++	if (err || !nd_get_dentry(&nd) || !nd_get_dentry(&nd)->d_inode) {
+ 		printk(KERN_CRIT "mini_fo: bpath_walk: path_walk failed.\n");
+ 		return NULL;
+ 	}
+-	return nd.dentry;
++	return nd_get_dentry(&nd);
+ }
+ 
+