X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs2.git;a=blobdiff_plain;f=yaffs_vfs_multi.c;h=de3dd75988ef7de715fd80ec28ff6b96e501a903;hp=65404343713798010b0ed7151217c25aee6c95cc;hb=3439fa4e60dd9799766b2c101f799ed9e565b632;hpb=9ec94eea1865dfb884640c4db487d6855f801107

diff --git a/yaffs_vfs_multi.c b/yaffs_vfs_multi.c
index 6540434..de3dd75 100644
--- a/yaffs_vfs_multi.c
+++ b/yaffs_vfs_multi.c
@@ -1,8 +1,7 @@
 /*
  * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
  *
- * Copyright (C) 2002-2011 Aleph One Ltd.
- *   for Toby Churchill Ltd and Brightstar Engineering
+ * Copyright (C) 2002-2018 Aleph One Ltd.
  *
  * Created by Charles Manning <charles@aleph1.co.uk>
  * Acknowledgements:
@@ -56,7 +55,8 @@
 #define YAFFS_HAS_EVICT_INODE
 #endif
 
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13))
+#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) && \
+    (LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0))
 #define YAFFS_NEW_FOLLOW_LINK 1
 #else
 #define YAFFS_NEW_FOLLOW_LINK 0
@@ -240,16 +240,39 @@ MODULE_PARM(yaffs_gc_control, "i");
 #define YAFFS_USE_DIR_ITERATE
 #endif
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0))
+#define YAFFS_USE_XATTR
+#endif
+
 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,12,0))
 #define YAFFS_NEW_PROCFS
 #include <linux/seq_file.h>
 #endif
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 8, 0))
+#define PAGE_CACHE_SIZE PAGE_SIZE
+#define PAGE_CACHE_SHIFT PAGE_SHIFT
+#define Y_GET_DENTRY(f) ((f)->f_path.dentry)
+#define page_cache_release put_page
+#define YAFFS_NEW_XATTR 1
+#define YAFFS_NEW_GET_LINK 1
+#else
+#define Y_GET_DENTRY(f) ((f)->f_dentry)
+#define YAFFS_NEW_XATTR 0
+#define YAFFS_NEW_GET_LINK 0
+#endif
 
 #define update_dir_time(dir) do {\
 			(dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \
 		} while (0)
 
+#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0))
+static inline int setattr_prepare(struct dentry *dentry, struct iattr *attr)
+{
+	return inode_change_ok(dentry->d_inode, attr);
+}
+#endif
+
 static void yaffs_fill_inode_from_obj(struct inode *inode,
 				      struct yaffs_obj *obj);
 
@@ -275,15 +298,15 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
 	struct yaffs_obj *obj;
 	unsigned char *pg_buf;
 	int ret;
-	loff_t pos = ((loff_t) pg->index) << PAGE_CACHE_SHIFT;
+	loff_t pos = ((loff_t) pg->index) << PAGE_SHIFT;
 	struct yaffs_dev *dev;
 
 	yaffs_trace(YAFFS_TRACE_OS,
 		"yaffs_readpage_nolock at %lld, size %08x",
 		(long long)pos,
-		(unsigned)PAGE_CACHE_SIZE);
+		(unsigned)PAGE_SIZE);
 
-	obj = yaffs_dentry_to_obj(f->f_dentry);
+	obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
 
 	dev = obj->my_dev;
 
@@ -481,7 +504,7 @@ static ssize_t yaffs_hold_space(struct file *f)
 
 	int n_free_chunks;
 
-	obj = yaffs_dentry_to_obj(f->f_dentry);
+	obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
 
 	dev = obj->my_dev;
 
@@ -499,7 +522,7 @@ static void yaffs_release_space(struct file *f)
 	struct yaffs_obj *obj;
 	struct yaffs_dev *dev;
 
-	obj = yaffs_dentry_to_obj(f->f_dentry);
+	obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
 
 	dev = obj->my_dev;
 
@@ -591,7 +614,7 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 	struct inode *inode;
 	struct yaffs_dev *dev;
 
-	obj = yaffs_dentry_to_obj(f->f_dentry);
+	obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
 
 	if (!obj) {
 		yaffs_trace(YAFFS_TRACE_OS,
@@ -603,7 +626,7 @@ static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n,
 
 	yaffs_gross_lock(dev);
 
-	inode = f->f_dentry->d_inode;
+	inode = Y_GET_DENTRY(f)->d_inode;
 
 	if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND)
 		ipos = inode->i_size;
@@ -727,7 +750,7 @@ static int yaffs_file_flush(struct file *file, fl_owner_t id)
 static int yaffs_file_flush(struct file *file)
 #endif
 {
-	struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry);
+	struct yaffs_obj *obj = yaffs_dentry_to_obj(Y_GET_DENTRY(file));
 
 	struct yaffs_dev *dev = obj->my_dev;
 
@@ -776,15 +799,28 @@ static int yaffs_sync_object(struct file *file, struct dentry *dentry,
 
 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22))
 static const struct file_operations yaffs_file_operations = {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0)
+#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 8, 0)
+	.read = new_sync_read,
+	.write = new_sync_write,
+#endif
+	.read_iter = generic_file_read_iter,
+	.write_iter = generic_file_write_iter,
+#else
 	.read = do_sync_read,
 	.write = do_sync_write,
 	.aio_read = generic_file_aio_read,
 	.aio_write = generic_file_aio_write,
+#endif
 	.mmap = generic_file_mmap,
 	.flush = yaffs_file_flush,
 	.fsync = yaffs_sync_object,
 	.splice_read = generic_file_splice_read,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 16, 0)
+	.splice_write = iter_file_splice_write,
+#else
 	.splice_write = generic_file_splice_write,
+#endif
 	.llseek = generic_file_llseek,
 };
 
@@ -869,7 +905,7 @@ static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
 #endif
 
 	if (error == 0)
-		error = inode_change_ok(inode, attr);
+		error = setattr_prepare(dentry, attr);
 	if (error == 0) {
 		int result;
 		if (!error) {
@@ -903,10 +939,17 @@ static int yaffs_setattr(struct dentry *dentry, struct iattr *attr)
 	return error;
 }
 
+#ifdef YAFFS_USE_XATTR
+#if (YAFFS_NEW_XATTR > 0)
+static int yaffs_setxattr(struct dentry *dentry, struct inode *inode,
+		const char *name, const void *value, size_t size, int flags)
+{
+#else
 static int yaffs_setxattr(struct dentry *dentry, const char *name,
 		   const void *value, size_t size, int flags)
 {
 	struct inode *inode = dentry->d_inode;
+#endif
 	int error = 0;
 	struct yaffs_dev *dev;
 	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
@@ -930,10 +973,16 @@ static int yaffs_setxattr(struct dentry *dentry, const char *name,
 	return error;
 }
 
+#ifdef YAFFS_NEW_XATTR
+static ssize_t yaffs_getxattr(struct dentry * dentry, struct inode *inode,
+	const char *name, void *buff, size_t size)
+{
+#else
 static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name,
 			void *buff, size_t size)
 {
 	struct inode *inode = dentry->d_inode;
+#endif
 	int error = 0;
 	struct yaffs_dev *dev;
 	struct yaffs_obj *obj = yaffs_inode_to_obj(inode);
@@ -981,6 +1030,7 @@ static int yaffs_removexattr(struct dentry *dentry, const char *name)
 
 	return error;
 }
+#endif
 
 static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
 {
@@ -1008,10 +1058,12 @@ static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size)
 
 static const struct inode_operations yaffs_file_inode_operations = {
 	.setattr = yaffs_setattr,
+#ifdef YAFFS_USE_XATTR
 	.setxattr = yaffs_setxattr,
 	.getxattr = yaffs_getxattr,
-	.listxattr = yaffs_listxattr,
 	.removexattr = yaffs_removexattr,
+#endif
+	.listxattr = yaffs_listxattr,
 };
 
 
@@ -1041,6 +1093,7 @@ static int yaffs_readlink(struct dentry *dentry, char __user * buffer,
 	return ret;
 }
 
+#if (YAFFS_NEW_GET_LINK == 0)
 #if (YAFFS_NEW_FOLLOW_LINK == 1)
 static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd)
 {
@@ -1079,7 +1132,28 @@ out:
 	return ret;
 #endif
 }
+#else
+static const char *yaffs_get_link(struct dentry *dentry, struct inode *inode, struct delayed_call *done)
+{
+	unsigned char *alias;
+	struct yaffs_dev *dev;
+
+	if (!dentry)
+		return ERR_PTR(-ECHILD);
+
+	dev = yaffs_dentry_to_obj(dentry)->my_dev;
 
+	yaffs_gross_lock(dev);
+
+	alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry));
+	yaffs_gross_unlock(dev);
+
+	if (!alias)
+		return ERR_PTR(-ENOMEM);
+	set_delayed_call(done, kfree_link, alias);
+	return alias;
+}
+#endif
 
 #ifdef YAFFS_HAS_PUT_INODE
 
@@ -1104,15 +1178,21 @@ void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias)
 
 static const struct inode_operations yaffs_symlink_inode_operations = {
 	.readlink = yaffs_readlink,
+#if (YAFFS_NEW_GET_LINK == 1)
+	.get_link = yaffs_get_link,
+#else
 	.follow_link = yaffs_follow_link,
+#endif
 #if (YAFFS_NEW_FOLLOW_LINK == 1)
 	.put_link = yaffs_put_link,
 #endif
 	.setattr = yaffs_setattr,
+#ifdef YAFFS_USE_XATTR
 	.setxattr = yaffs_setxattr,
 	.getxattr = yaffs_getxattr,
-	.listxattr = yaffs_listxattr,
 	.removexattr = yaffs_removexattr,
+#endif
+	.listxattr = yaffs_listxattr,
 };
 
 #ifdef YAFFS_USE_OWN_IGET
@@ -1494,8 +1574,13 @@ static int yaffs_symlink(struct inode *dir, struct dentry *dentry,
  *
  * NB: POSIX says you can rename an object over an old object of the same name
  */
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 9, 0))
+static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
+			struct inode *new_dir, struct dentry *new_dentry, unsigned int unused)
+#else
 static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry,
 			struct inode *new_dir, struct dentry *new_dentry)
+#endif
 {
 	struct yaffs_dev *dev;
 	int ret_val = YAFFS_FAIL;
@@ -1583,10 +1668,12 @@ static const struct inode_operations yaffs_dir_inode_operations = {
 	.mknod = yaffs_mknod,
 	.rename = yaffs_rename,
 	.setattr = yaffs_setattr,
+	.listxattr = yaffs_listxattr,
+#ifdef YAFFS_USE_XATTR
 	.setxattr = yaffs_setxattr,
 	.getxattr = yaffs_getxattr,
-	.listxattr = yaffs_listxattr,
 	.removexattr = yaffs_removexattr,
+#endif
 };
 
 /*-----------------------------------------------------------------*/
@@ -1716,7 +1803,7 @@ static int yaffs_iterate(struct file *f, struct dir_context *dc)
 
 	char name[YAFFS_MAX_NAME_LENGTH + 1];
 
-	obj = yaffs_dentry_to_obj(f->f_dentry);
+	obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
 	dev = obj->my_dev;
 
 	yaffs_gross_lock(dev);
@@ -1729,8 +1816,10 @@ static int yaffs_iterate(struct file *f, struct dir_context *dc)
 		goto out;
 	}
 
-	if (!dir_emit_dots(f, dc))
+	if (!dir_emit_dots(f, dc)) {
+		yaffs_gross_unlock(dev);
 		return 0;
+	}
 
 	curoffs = 1;
 
@@ -1780,14 +1869,14 @@ static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir)
 	struct yaffs_obj *obj;
 	struct yaffs_dev *dev;
 	struct yaffs_search_context *sc;
-	struct inode *inode = f->f_dentry->d_inode;
+	struct inode *inode = Y_GET_DENTRY(f)->d_inode;
 	unsigned long offset, curoffs;
 	struct yaffs_obj *l;
 	int ret_val = 0;
 
 	char name[YAFFS_MAX_NAME_LENGTH + 1];
 
-	obj = yaffs_dentry_to_obj(f->f_dentry);
+	obj = yaffs_dentry_to_obj(Y_GET_DENTRY(f));
 	dev = obj->my_dev;
 
 	yaffs_gross_lock(dev);
@@ -3249,9 +3338,7 @@ static int yaffs_proc_read(char *page,
 	/* Print header first */
 	if (step == 0)
 		buf +=
-		    sprintf(buf,
-			    "Multi-version YAFFS built:" __DATE__ " " __TIME__
-			    "\n");
+		    sprintf(buf, "Multi-version YAFFS\n");
 	else if (step == 1)
 		buf += sprintf(buf, "\n");
 	else {
@@ -3601,7 +3688,7 @@ static int __init init_yaffs_fs(void)
 	struct file_system_to_install *fsinst;
 
 	yaffs_trace(YAFFS_TRACE_ALWAYS,
-		"yaffs built " __DATE__ " " __TIME__ " Installing.");
+		"yaffs Installing.");
 
 	mutex_init(&yaffs_context_lock);
 
@@ -3642,7 +3729,7 @@ static void __exit exit_yaffs_fs(void)
 	struct file_system_to_install *fsinst;
 
 	yaffs_trace(YAFFS_TRACE_ALWAYS,
-		"yaffs built " __DATE__ " " __TIME__ " removing.");
+		"yaffs removing.");
 
 	remove_proc_entry("yaffs", YPROC_ROOT);