[Fwd: [PATCH 1/8] reiser4-add-crc-sendfile.patch]

[Hans Reiser <reiser@namesys.com>]

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From: Edward Shishkin <edward@namesys.com>

This patch adds sendfile method for cryptcompress files.

Signed-off-by: Vladimir V. Saveliev <vs@namesys.com>


 fs/reiser4/plugin/file/cryptcompress.c |   35 +++++++++++++++++++++++++++++++--
 fs/reiser4/plugin/file/file.h          |    2 +
 fs/reiser4/plugin/object.c             |    3 +-
 3 files changed, 37 insertions(+), 3 deletions(-)

diff -puN fs/reiser4/plugin/file/cryptcompress.c~reiser4-add-crc-sendfile fs/reiser4/plugin/file/cryptcompress.c
--- linux-2.6.14-mm2/fs/reiser4/plugin/file/cryptcompress.c~reiser4-add-crc-sendfile	2005-11-15 16:58:35.000000000 +0300
+++ linux-2.6.14-mm2-vs/fs/reiser4/plugin/file/cryptcompress.c	2005-11-15 17:08:26.000000000 +0300
@@ -3670,8 +3670,8 @@ int capturepage_cryptcompress(struct pag
 /* plugin->u.file.mmap */
 int mmap_cryptcompress(struct file *file, struct vm_area_struct *vma)
 {
-	return -ENOSYS;
-	//return generic_file_mmap(file, vma);
+	//return -ENOSYS;
+	return generic_file_mmap(file, vma);
 }
 
 /* plugin->u.file.release */
@@ -3834,6 +3834,37 @@ int setattr_cryptcompress(struct dentry 
 	return result;
 }
 
+/* sendfile_cryptcompress - sendfile of struct file_operations */
+ssize_t
+sendfile_cryptcompress(struct file *file, loff_t *ppos, size_t count,
+		       read_actor_t actor, void *target)
+{
+	reiser4_context *ctx;
+	ssize_t result;
+	struct inode *inode;
+	cryptcompress_info_t *info;
+
+	inode = file->f_dentry->d_inode;
+	ctx = init_context(inode->i_sb);
+	if (IS_ERR(ctx))
+		return PTR_ERR(ctx);
+	/*
+	 * generic_file_sndfile may want to call update_atime. Grab space for
+	 * stat data update
+	 */
+	result = reiser4_grab_space(estimate_update_common(inode),
+				    BA_CAN_COMMIT);
+	if (result)
+		goto exit;
+	info = cryptcompress_inode_data(inode);
+	down_read(&info->lock);
+	result = generic_file_sendfile(file, ppos, count, actor, target);
+	up_read(&info->lock);
+ exit:
+	reiser4_exit_context(ctx);
+	return result;
+}
+
 static int
 save_len_cryptcompress_plugin(struct inode *inode, reiser4_plugin * plugin)
 {
diff -puN fs/reiser4/plugin/file/file.h~reiser4-add-crc-sendfile fs/reiser4/plugin/file/file.h
--- linux-2.6.14-mm2/fs/reiser4/plugin/file/file.h~reiser4-add-crc-sendfile	2005-11-15 16:58:35.000000000 +0300
+++ linux-2.6.14-mm2-vs/fs/reiser4/plugin/file/file.h	2005-11-15 16:58:35.000000000 +0300
@@ -169,6 +169,8 @@ ssize_t read_cryptcompress(struct file *
 ssize_t write_cryptcompress(struct file *, const char __user *buf, size_t write_amount,
 			    loff_t * off);
 int mmap_cryptcompress(struct file *, struct vm_area_struct *);
+ssize_t sendfile_cryptcompress(struct file *file, loff_t *ppos, size_t count,
+			       read_actor_t actor, void *target);
 
 /* address space operations */
 extern int readpage_cryptcompress(struct file *, struct page *);
diff -puN fs/reiser4/plugin/object.c~reiser4-add-crc-sendfile fs/reiser4/plugin/object.c
--- linux-2.6.14-mm2/fs/reiser4/plugin/object.c~reiser4-add-crc-sendfile	2005-11-15 16:58:35.000000000 +0300
+++ linux-2.6.14-mm2-vs/fs/reiser4/plugin/object.c	2005-11-15 16:58:35.000000000 +0300
@@ -306,7 +306,7 @@ file_plugin file_plugins[LAST_FILE_PLUGI
 			.write = write_cryptcompress,
 			.mmap = mmap_cryptcompress,
 			.fsync = sync_common,
-			.sendfile = sendfile_common
+			.sendfile = sendfile_cryptcompress
 		},
 		.as_ops = {
 			.writepage = reiser4_writepage,
@@ -331,6 +331,7 @@ file_plugin file_plugins[LAST_FILE_PLUGI
 		.owns_item = owns_item_common,
 		.can_add_link = can_add_link_common,
 		.detach = dummyop,
+		.bind = dummyop,
 		.safelink = safelink_common,
 		.estimate = {
 			.create = estimate_create_common,

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