Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / fs / hostfs / hostfs_kern.c

diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 4bf43ea..bf0f8e1 100644 (file)
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -8,14 +8,12 @@
 
 #include <linux/stddef.h>
 #include <linux/fs.h>
-#include <linux/version.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/pagemap.h>
 #include <linux/blkdev.h>
 #include <linux/list.h>
-#include <linux/root_dev.h>
 #include <linux/statfs.h>
 #include <linux/kdev_t.h>
 #include <asm/uaccess.h>
@@ -160,8 +158,6 @@ static int read_name(struct inode *ino, char *name)
        ino->i_size = i_size;
        ino->i_blksize = i_blksize;
        ino->i_blocks = i_blocks;
-       if((ino->i_sb->s_dev == ROOT_DEV) && (ino->i_uid == getuid()))
-               ino->i_uid = 0;
        return(0);
 }
 
@@ -287,6 +283,7 @@ static struct inode *hostfs_alloc_inode(struct super_block *sb)
 
 static void hostfs_delete_inode(struct inode *inode)
 {
+       truncate_inode_pages(&inode->i_data, 0);
        if(HOSTFS_I(inode)->fd != -1) {
                close_file(&HOSTFS_I(inode)->fd);
                HOSTFS_I(inode)->fd = -1;
@@ -296,8 +293,7 @@ static void hostfs_delete_inode(struct inode *inode)
 
 static void hostfs_destroy_inode(struct inode *inode)
 {
-       if(HOSTFS_I(inode)->host_filename)
-               kfree(HOSTFS_I(inode)->host_filename);
+       kfree(HOSTFS_I(inode)->host_filename);
 
        /*XXX: This should not happen, probably. The check is here for
         * additional safety.*/
@@ -385,10 +381,10 @@ int hostfs_file_open(struct inode *ino, struct file *file)
 
 int hostfs_fsync(struct file *file, struct dentry *dentry, int datasync)
 {
-       return(0);
+       return fsync_file(HOSTFS_I(dentry->d_inode)->fd, datasync);
 }
 
-static struct file_operations hostfs_file_fops = {
+static const struct file_operations hostfs_file_fops = {
        .llseek         = generic_file_llseek,
        .read           = generic_file_read,
        .sendfile       = generic_file_sendfile,
@@ -403,7 +399,7 @@ static struct file_operations hostfs_file_fops = {
        .fsync          = hostfs_fsync,
 };
 
-static struct file_operations hostfs_dir_fops = {
+static const struct file_operations hostfs_dir_fops = {
        .llseek         = generic_file_llseek,
        .readdir        = hostfs_readdir,
        .read           = generic_read_dir,
@@ -505,11 +501,16 @@ int hostfs_commit_write(struct file *file, struct page *page, unsigned from,
        long long start;
        int err = 0;
 
-       start = (long long) (page->index << PAGE_CACHE_SHIFT) + from;
+       start = (((long long) page->index) << PAGE_CACHE_SHIFT) + from;
        buffer = kmap(page);
        err = write_file(FILE_HOSTFS_I(file)->fd, &start, buffer + from,
                         to - from);
        if(err > 0) err = 0;
+
+       /* Actually, if !err, write_file has added to-from to start, so, despite
+        * the appearance, we are comparing i_size against the _last_ written
+        * location, as we should. */
+
        if(!err && (start > inode->i_size))
                inode->i_size = start;
 
@@ -795,11 +796,6 @@ int hostfs_rename(struct inode *from_ino, struct dentry *from,
        return(err);
 }
 
-void hostfs_truncate(struct inode *ino)
-{
-       not_implemented();
-}
-
 int hostfs_permission(struct inode *ino, int desired, struct nameidata *nd)
 {
        char *name;
@@ -841,16 +837,10 @@ int hostfs_setattr(struct dentry *dentry, struct iattr *attr)
                attrs.ia_mode = attr->ia_mode;
        }
        if(attr->ia_valid & ATTR_UID){
-               if((dentry->d_inode->i_sb->s_dev == ROOT_DEV) &&
-                  (attr->ia_uid == 0))
-                       attr->ia_uid = getuid();
                attrs.ia_valid |= HOSTFS_ATTR_UID;
                attrs.ia_uid = attr->ia_uid;
        }
        if(attr->ia_valid & ATTR_GID){
-               if((dentry->d_inode->i_sb->s_dev == ROOT_DEV) &&
-                  (attr->ia_gid == 0))
-                       attr->ia_gid = getgid();
                attrs.ia_valid |= HOSTFS_ATTR_GID;
                attrs.ia_gid = attr->ia_gid;
        }
@@ -902,7 +892,6 @@ static struct inode_operations hostfs_iops = {
        .rmdir          = hostfs_rmdir,
        .mknod          = hostfs_mknod,
        .rename         = hostfs_rename,
-       .truncate       = hostfs_truncate,
        .permission     = hostfs_permission,
        .setattr        = hostfs_setattr,
        .getattr        = hostfs_getattr,
@@ -918,7 +907,6 @@ static struct inode_operations hostfs_dir_iops = {
        .rmdir          = hostfs_rmdir,
        .mknod          = hostfs_mknod,
        .rename         = hostfs_rename,
-       .truncate       = hostfs_truncate,
        .permission     = hostfs_permission,
        .setattr        = hostfs_setattr,
        .getattr        = hostfs_getattr,
@@ -927,10 +915,8 @@ static struct inode_operations hostfs_dir_iops = {
 int hostfs_link_readpage(struct file *file, struct page *page)
 {
        char *buffer, *name;
-       long long start;
        int err;
 
-       start = page->index << PAGE_CACHE_SHIFT;
        buffer = kmap(page);
        name = inode_name(page->mapping->host, 0);
        if(name == NULL) return(-ENOMEM);