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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

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Pull fuse fixes from Miklos Szeredi:
 "A regression fix and bug fix bound for stable"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  fuse: fix fuse_write_end() if zero bytes were copied
  fuse: fix root dentry initialization
This commit is contained in:
Linus Torvalds 2016-11-16 09:20:10 -08:00
commit 984573abf8
4 changed files with 14 additions and 1 deletions
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5
fs/fuse/dir.c
View File

@ -286,6 +286,11 @@ const struct dentry_operations fuse_dentry_operations = {
.d_release = fuse_dentry_release,
};
const struct dentry_operations fuse_root_dentry_operations = {
.d_init = fuse_dentry_init,
.d_release = fuse_dentry_release,
};
int fuse_valid_type(int m)
{
return S_ISREG(m) || S_ISDIR(m) || S_ISLNK(m) || S_ISCHR(m) ||

6
fs/fuse/file.c
View File

@ -1985,6 +1985,10 @@ static int fuse_write_end(struct file *file, struct address_space *mapping,
{
struct inode *inode = page->mapping->host;
/* Haven't copied anything? Skip zeroing, size extending, dirtying. */
if (!copied)
goto unlock;
if (!PageUptodate(page)) {
/* Zero any unwritten bytes at the end of the page */
size_t endoff = (pos + copied) & ~PAGE_MASK;
@ -1995,6 +1999,8 @@ static int fuse_write_end(struct file *file, struct address_space *mapping,
fuse_write_update_size(inode, pos + copied);
set_page_dirty(page);
unlock:
unlock_page(page);
put_page(page);

1
fs/fuse/fuse_i.h
View File

@ -692,6 +692,7 @@ static inline u64 get_node_id(struct inode *inode)
extern const struct file_operations fuse_dev_operations;
extern const struct dentry_operations fuse_dentry_operations;
extern const struct dentry_operations fuse_root_dentry_operations;
/**
* Inode to nodeid comparison.

3
fs/fuse/inode.c
View File

@ -1131,10 +1131,11 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
err = -ENOMEM;
root = fuse_get_root_inode(sb, d.rootmode);
sb->s_d_op = &fuse_root_dentry_operations;
root_dentry = d_make_root(root);
if (!root_dentry)
goto err_dev_free;
/* only now - we want root dentry with NULL ->d_op */
/* Root dentry doesn't have .d_revalidate */
sb->s_d_op = &fuse_dentry_operations;
init_req = fuse_request_alloc(0);