X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=fs%2Fhostfs%2Fhostfs_kern.c;h=c77862032e844262a199549d01ca16489b0578f8;hb=7f46e6ca0183568a688e6bfe40e3ab9adb305d03;hp=9baf69773ed119c2144bdb228ea592a715cec1f5;hpb=5cb69bcacea70024252138a9cb4229a142a93389;p=linux-2.6-omap-h63xx.git

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 9baf69773ed..c77862032e8 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  *
  * Ported the filesystem routines to 2.5.
@@ -20,7 +20,6 @@
 #include "hostfs.h"
 #include "kern_util.h"
 #include "kern.h"
-#include "user_util.h"
 #include "init.h"
 
 struct hostfs_inode_info {
@@ -32,14 +31,14 @@ struct hostfs_inode_info {
 
 static inline struct hostfs_inode_info *HOSTFS_I(struct inode *inode)
 {
-	return(list_entry(inode, struct hostfs_inode_info, vfs_inode));
+	return list_entry(inode, struct hostfs_inode_info, vfs_inode);
 }
 
 #define FILE_HOSTFS_I(file) HOSTFS_I((file)->f_path.dentry->d_inode)
 
 int hostfs_d_delete(struct dentry *dentry)
 {
-	return(1);
+	return 1;
 }
 
 struct dentry_operations hostfs_dentry_ops = {
@@ -80,7 +79,7 @@ static int __init hostfs_args(char *options, int *add)
 		}
 		options = ptr;
 	}
-	return(0);
+	return 0;
 }
 
 __uml_setup("hostfs=", hostfs_args,
@@ -111,7 +110,8 @@ static char *dentry_name(struct dentry *dentry, int extra)
 	root = HOSTFS_I(parent->d_inode)->host_filename;
 	len += strlen(root);
 	name = kmalloc(len + extra + 1, GFP_KERNEL);
-	if(name == NULL) return(NULL);
+	if(name == NULL)
+		return NULL;
 
 	name[len] = '\0';
 	parent = dentry;
@@ -123,7 +123,7 @@ static char *dentry_name(struct dentry *dentry, int extra)
 		parent = parent->d_parent;
 	}
 	strncpy(name, root, strlen(root));
-	return(name);
+	return name;
 }
 
 static char *inode_name(struct inode *ino, int extra)
@@ -131,7 +131,7 @@ static char *inode_name(struct inode *ino, int extra)
 	struct dentry *dentry;
 
 	dentry = list_entry(ino->i_dentry.next, struct dentry, d_alias);
-	return(dentry_name(dentry, extra));
+	return dentry_name(dentry, extra);
 }
 
 static int read_name(struct inode *ino, char *name)
@@ -148,16 +148,16 @@ static int read_name(struct inode *ino, char *name)
 
 	err = stat_file(name, &i_ino, &i_mode, &i_nlink, &ino->i_uid,
 			&ino->i_gid, &i_size, &ino->i_atime, &ino->i_mtime,
-			&ino->i_ctime, &i_blksize, &i_blocks);
+			&ino->i_ctime, &i_blksize, &i_blocks, -1);
 	if(err)
-		return(err);
+		return err;
 
 	ino->i_ino = i_ino;
 	ino->i_mode = i_mode;
 	ino->i_nlink = i_nlink;
 	ino->i_size = i_size;
 	ino->i_blocks = i_blocks;
-	return(0);
+	return 0;
 }
 
 static char *follow_link(char *link)
@@ -182,11 +182,11 @@ static char *follow_link(char *link)
 		goto out_free;
 
 	if(*name == '/')
-		return(name);
+		return name;
 
 	end = strrchr(link, '/');
 	if(end == NULL)
-		return(name);
+		return name;
 
 	*(end + 1) = '\0';
 	len = strlen(link) + strlen(name) + 1;
@@ -200,12 +200,12 @@ static char *follow_link(char *link)
 	sprintf(resolved, "%s%s", link, name);
 	kfree(name);
 	kfree(link);
-	return(resolved);
+	return resolved;
 
  out_free:
 	kfree(name);
  out:
-	return(ERR_PTR(n));
+	return ERR_PTR(n);
 }
 
 static int read_inode(struct inode *ino)
@@ -235,7 +235,7 @@ static int read_inode(struct inode *ino)
 	err = read_name(ino, name);
 	kfree(name);
  out:
-	return(err);
+	return err;
 }
 
 int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
@@ -255,14 +255,15 @@ int hostfs_statfs(struct dentry *dentry, struct kstatfs *sf)
 			&sf->f_bsize, &f_blocks, &f_bfree, &f_bavail, &f_files,
 			&f_ffree, &sf->f_fsid, sizeof(sf->f_fsid),
 			&sf->f_namelen, sf->f_spare);
-	if(err) return(err);
+	if(err)
+		return err;
 	sf->f_blocks = f_blocks;
 	sf->f_bfree = f_bfree;
 	sf->f_bavail = f_bavail;
 	sf->f_files = f_files;
 	sf->f_ffree = f_ffree;
 	sf->f_type = HOSTFS_SUPER_MAGIC;
-	return(0);
+	return 0;
 }
 
 static struct inode *hostfs_alloc_inode(struct super_block *sb)
@@ -271,13 +272,13 @@ static struct inode *hostfs_alloc_inode(struct super_block *sb)
 
 	hi = kmalloc(sizeof(*hi), GFP_KERNEL);
 	if(hi == NULL)
-		return(NULL);
+		return NULL;
 
 	*hi = ((struct hostfs_inode_info) { .host_filename	= NULL,
 					    .fd			= -1,
 					    .mode		= 0 });
 	inode_init_once(&hi->vfs_inode);
-	return(&hi->vfs_inode);
+	return &hi->vfs_inode;
 }
 
 static void hostfs_delete_inode(struct inode *inode)
@@ -326,10 +327,12 @@ int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
 	int error, len;
 
 	name = dentry_name(file->f_path.dentry, 0);
-	if(name == NULL) return(-ENOMEM);
+	if(name == NULL)
+		return -ENOMEM;
 	dir = open_dir(name, &error);
 	kfree(name);
-	if(dir == NULL) return(-error);
+	if(dir == NULL)
+		return -error;
 	next = file->f_pos;
 	while((name = read_dir(dir, &next, &ino, &len)) != NULL){
 		error = (*filldir)(ent, name, len, file->f_pos,
@@ -338,7 +341,7 @@ int hostfs_readdir(struct file *file, void *ent, filldir_t filldir)
 		file->f_pos = next;
 	}
 	close_dir(dir);
-	return(0);
+	return 0;
 }
 
 int hostfs_file_open(struct inode *ino, struct file *file)
@@ -348,7 +351,7 @@ int hostfs_file_open(struct inode *ino, struct file *file)
 
 	mode = file->f_mode & (FMODE_READ | FMODE_WRITE);
 	if((mode & HOSTFS_I(ino)->mode) == mode)
-		return(0);
+		return 0;
 
 	/* The file may already have been opened, but with the wrong access,
 	 * so this resets things and reopens the file with the new access.
@@ -368,14 +371,15 @@ int hostfs_file_open(struct inode *ino, struct file *file)
 
 	name = dentry_name(file->f_path.dentry, 0);
 	if(name == NULL)
-		return(-ENOMEM);
+		return -ENOMEM;
 
 	fd = open_file(name, r, w, append);
 	kfree(name);
-	if(fd < 0) return(fd);
+	if(fd < 0)
+		return fd;
 	FILE_HOSTFS_I(file)->fd = fd;
 
-	return(0);
+	return 0;
 }
 
 int hostfs_fsync(struct file *file, struct dentry *dentry, int datasync)
@@ -386,7 +390,7 @@ int hostfs_fsync(struct file *file, struct dentry *dentry, int datasync)
 static const struct file_operations hostfs_file_fops = {
 	.llseek		= generic_file_llseek,
 	.read		= do_sync_read,
-	.sendfile	= generic_file_sendfile,
+	.splice_read	= generic_file_splice_read,
 	.aio_read	= generic_file_aio_read,
 	.aio_write	= generic_file_aio_write,
 	.write		= do_sync_write,
@@ -459,7 +463,7 @@ int hostfs_readpage(struct file *file, struct page *page)
  out:
 	kunmap(page);
 	unlock_page(page);
-	return(err);
+	return err;
 }
 
 int hostfs_prepare_write(struct file *file, struct page *page,
@@ -486,7 +490,7 @@ int hostfs_prepare_write(struct file *file, struct page *page,
 	err = 0;
  out:
 	kunmap(page);
-	return(err);
+	return err;
 }
 
 int hostfs_commit_write(struct file *file, struct page *page, unsigned from,
@@ -512,7 +516,7 @@ int hostfs_commit_write(struct file *file, struct page *page, unsigned from,
 		inode->i_size = start;
 
 	kunmap(page);
-	return(err);
+	return err;
 }
 
 static const struct address_space_operations hostfs_aops = {
@@ -570,7 +574,7 @@ static int init_inode(struct inode *inode, struct dentry *dentry)
 		break;
 	}
  out:
-	return(err);
+	return err;
 }
 
 int hostfs_create(struct inode *dir, struct dentry *dentry, int mode,
@@ -608,16 +612,16 @@ int hostfs_create(struct inode *dir, struct dentry *dentry, int mode,
 	HOSTFS_I(inode)->fd = fd;
 	HOSTFS_I(inode)->mode = FMODE_READ | FMODE_WRITE;
 	d_instantiate(dentry, inode);
-	return(0);
+	return 0;
 
  out_put:
 	iput(inode);
  out:
-	return(error);
+	return error;
 }
 
 struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
-                            struct nameidata *nd)
+			     struct nameidata *nd)
 {
 	struct inode *inode;
 	char *name;
@@ -648,44 +652,45 @@ struct dentry *hostfs_lookup(struct inode *ino, struct dentry *dentry,
 
 	d_add(dentry, inode);
 	dentry->d_op = &hostfs_dentry_ops;
-	return(NULL);
+	return NULL;
 
  out_put:
 	iput(inode);
  out:
-	return(ERR_PTR(err));
+	return ERR_PTR(err);
 }
 
 static char *inode_dentry_name(struct inode *ino, struct dentry *dentry)
 {
-        char *file;
+	char *file;
 	int len;
 
 	file = inode_name(ino, dentry->d_name.len + 1);
-	if(file == NULL) return(NULL);
-        strcat(file, "/");
+	if(file == NULL)
+		return NULL;
+	strcat(file, "/");
 	len = strlen(file);
-        strncat(file, dentry->d_name.name, dentry->d_name.len);
+	strncat(file, dentry->d_name.name, dentry->d_name.len);
 	file[len + dentry->d_name.len] = '\0';
-        return(file);
+	return file;
 }
 
 int hostfs_link(struct dentry *to, struct inode *ino, struct dentry *from)
 {
-        char *from_name, *to_name;
-        int err;
+	char *from_name, *to_name;
+	int err;
 
-        if((from_name = inode_dentry_name(ino, from)) == NULL)
-                return(-ENOMEM);
-        to_name = dentry_name(to, 0);
+	if((from_name = inode_dentry_name(ino, from)) == NULL)
+		return -ENOMEM;
+	to_name = dentry_name(to, 0);
 	if(to_name == NULL){
 		kfree(from_name);
-		return(-ENOMEM);
+		return -ENOMEM;
 	}
-        err = link_file(to_name, from_name);
-        kfree(from_name);
-        kfree(to_name);
-        return(err);
+	err = link_file(to_name, from_name);
+	kfree(from_name);
+	kfree(to_name);
+	return err;
 }
 
 int hostfs_unlink(struct inode *ino, struct dentry *dentry)
@@ -693,13 +698,14 @@ int hostfs_unlink(struct inode *ino, struct dentry *dentry)
 	char *file;
 	int err;
 
-	if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
+	if((file = inode_dentry_name(ino, dentry)) == NULL)
+		return -ENOMEM;
 	if(append)
-		return(-EPERM);
+		return -EPERM;
 
 	err = unlink_file(file);
 	kfree(file);
-	return(err);
+	return err;
 }
 
 int hostfs_symlink(struct inode *ino, struct dentry *dentry, const char *to)
@@ -707,10 +713,11 @@ int hostfs_symlink(struct inode *ino, struct dentry *dentry, const char *to)
 	char *file;
 	int err;
 
-	if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
+	if((file = inode_dentry_name(ino, dentry)) == NULL)
+		return -ENOMEM;
 	err = make_symlink(file, to);
 	kfree(file);
-	return(err);
+	return err;
 }
 
 int hostfs_mkdir(struct inode *ino, struct dentry *dentry, int mode)
@@ -718,10 +725,11 @@ int hostfs_mkdir(struct inode *ino, struct dentry *dentry, int mode)
 	char *file;
 	int err;
 
-	if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
+	if((file = inode_dentry_name(ino, dentry)) == NULL)
+		return -ENOMEM;
 	err = do_mkdir(file, mode);
 	kfree(file);
-	return(err);
+	return err;
 }
 
 int hostfs_rmdir(struct inode *ino, struct dentry *dentry)
@@ -729,10 +737,11 @@ int hostfs_rmdir(struct inode *ino, struct dentry *dentry)
 	char *file;
 	int err;
 
-	if((file = inode_dentry_name(ino, dentry)) == NULL) return(-ENOMEM);
+	if((file = inode_dentry_name(ino, dentry)) == NULL)
+		return -ENOMEM;
 	err = do_rmdir(file);
 	kfree(file);
-	return(err);
+	return err;
 }
 
 int hostfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
@@ -765,14 +774,14 @@ int hostfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
 		goto out_put;
 
 	d_instantiate(dentry, inode);
-	return(0);
+	return 0;
 
  out_free:
 	kfree(name);
  out_put:
 	iput(inode);
  out:
-	return(err);
+	return err;
 }
 
 int hostfs_rename(struct inode *from_ino, struct dentry *from,
@@ -782,15 +791,15 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
 	int err;
 
 	if((from_name = inode_dentry_name(from_ino, from)) == NULL)
-		return(-ENOMEM);
+		return -ENOMEM;
 	if((to_name = inode_dentry_name(to_ino, to)) == NULL){
 		kfree(from_name);
-		return(-ENOMEM);
+		return -ENOMEM;
 	}
 	err = rename_file(from_name, to_name);
 	kfree(from_name);
 	kfree(to_name);
-	return(err);
+	return err;
 }
 
 int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
@@ -802,7 +811,8 @@ int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
 	if (desired & MAY_WRITE) w = 1;
 	if (desired & MAY_EXEC) x = 1;
 	name = inode_name(ino, 0);
-	if (name == NULL) return(-ENOMEM);
+	if (name == NULL)
+		return -ENOMEM;
 
 	if (S_ISCHR(ino->i_mode) || S_ISBLK(ino->i_mode) ||
 			S_ISFIFO(ino->i_mode) || S_ISSOCK(ino->i_mode))
@@ -821,6 +831,8 @@ int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
 	char *name;
 	int err;
 
+	int fd = HOSTFS_I(dentry->d_inode)->fd;
+
 	err = inode_change_ok(dentry->d_inode, attr);
 	if (err)
 		return err;
@@ -864,20 +876,21 @@ int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
 		attrs.ia_valid |= HOSTFS_ATTR_MTIME_SET;
 	}
 	name = dentry_name(dentry, 0);
-	if(name == NULL) return(-ENOMEM);
-	err = set_attr(name, &attrs);
+	if(name == NULL)
+		return -ENOMEM;
+	err = set_attr(name, &attrs, fd);
 	kfree(name);
 	if(err)
-		return(err);
+		return err;
 
-	return(inode_setattr(dentry->d_inode, attr));
+	return inode_setattr(dentry->d_inode, attr);
 }
 
 int hostfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
 	   struct kstat *stat)
 {
 	generic_fillattr(dentry->d_inode, stat);
-	return(0);
+	return 0;
 }
 
 static const struct inode_operations hostfs_iops = {
@@ -916,7 +929,8 @@ int hostfs_link_readpage(struct file *file, struct page *page)
 
 	buffer = kmap(page);
 	name = inode_name(page->mapping->host, 0);
-	if(name == NULL) return(-ENOMEM);
+	if(name == NULL)
+		return -ENOMEM;
 	err = do_readlink(name, buffer, PAGE_CACHE_SIZE);
 	kfree(name);
 	if(err == PAGE_CACHE_SIZE)
@@ -929,7 +943,7 @@ int hostfs_link_readpage(struct file *file, struct page *page)
 	}
 	kunmap(page);
 	unlock_page(page);
-	return(err);
+	return err;
 }
 
 static const struct address_space_operations hostfs_link_aops = {
@@ -939,7 +953,7 @@ static const struct address_space_operations hostfs_link_aops = {
 static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
 {
 	struct inode *root_inode;
-	char *name, *data = d;
+	char *host_root_path, *req_root = d;
 	int err;
 
 	sb->s_blocksize = 1024;
@@ -948,16 +962,16 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
 	sb->s_op = &hostfs_sbops;
 
 	/* NULL is printed as <NULL> by sprintf: avoid that. */
-	if (data == NULL)
-		data = "";
+	if (req_root == NULL)
+		req_root = "";
 
 	err = -ENOMEM;
-	name = kmalloc(strlen(root_ino) + 1
-			+ strlen(data) + 1, GFP_KERNEL);
-	if(name == NULL)
+	host_root_path = kmalloc(strlen(root_ino) + 1
+				 + strlen(req_root) + 1, GFP_KERNEL);
+	if(host_root_path == NULL)
 		goto out;
 
-	sprintf(name, "%s/%s", root_ino, data);
+	sprintf(host_root_path, "%s/%s", root_ino, req_root);
 
 	root_inode = iget(sb, 0);
 	if(root_inode == NULL)
@@ -967,10 +981,10 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
 	if(err)
 		goto out_put;
 
-	HOSTFS_I(root_inode)->host_filename = name;
-	/* Avoid that in the error path, iput(root_inode) frees again name through
-	 * hostfs_destroy_inode! */
-	name = NULL;
+	HOSTFS_I(root_inode)->host_filename = host_root_path;
+	/* Avoid that in the error path, iput(root_inode) frees again
+	 * host_root_path through hostfs_destroy_inode! */
+	host_root_path = NULL;
 
 	err = -ENOMEM;
 	sb->s_root = d_alloc_root(root_inode);
@@ -979,20 +993,20 @@ static int hostfs_fill_sb_common(struct super_block *sb, void *d, int silent)
 
 	err = read_inode(root_inode);
 	if(err){
-                /* No iput in this case because the dput does that for us */
-                dput(sb->s_root);
-                sb->s_root = NULL;
+		/* No iput in this case because the dput does that for us */
+		dput(sb->s_root);
+		sb->s_root = NULL;
 		goto out;
-        }
+	}
 
-	return(0);
+	return 0;
 
- out_put:
-        iput(root_inode);
- out_free:
-	kfree(name);
- out:
-	return(err);
+out_put:
+	iput(root_inode);
+out_free:
+	kfree(host_root_path);
+out:
+	return err;
 }
 
 static int hostfs_read_sb(struct file_system_type *type,
@@ -1012,7 +1026,7 @@ static struct file_system_type hostfs_type = {
 
 static int __init init_hostfs(void)
 {
-	return(register_filesystem(&hostfs_type));
+	return register_filesystem(&hostfs_type);
 }
 
 static void __exit exit_hostfs(void)
@@ -1023,14 +1037,3 @@ static void __exit exit_hostfs(void)
 module_init(init_hostfs)
 module_exit(exit_hostfs)
 MODULE_LICENSE("GPL");
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */