diff options
Diffstat (limited to 'fs/ecryptfs/mmap.c')
| -rw-r--r-- | fs/ecryptfs/mmap.c | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c index 7be8e91b5ba0..b731b09499cb 100644 --- a/fs/ecryptfs/mmap.c +++ b/fs/ecryptfs/mmap.c @@ -446,6 +446,7 @@ static int ecryptfs_write_inode_size_to_header(struct file *lower_file, const struct address_space_operations *lower_a_ops; u64 file_size; +retry: header_page = grab_cache_page(lower_inode->i_mapping, 0); if (!header_page) { ecryptfs_printk(KERN_ERR, "grab_cache_page for " @@ -456,9 +457,10 @@ static int ecryptfs_write_inode_size_to_header(struct file *lower_file, lower_a_ops = lower_inode->i_mapping->a_ops; rc = lower_a_ops->prepare_write(lower_file, header_page, 0, 8); if (rc) { - if (rc == AOP_TRUNCATED_PAGE) + if (rc == AOP_TRUNCATED_PAGE) { ecryptfs_release_lower_page(header_page, 0); - else + goto retry; + } else ecryptfs_release_lower_page(header_page, 1); goto out; } @@ -473,9 +475,10 @@ static int ecryptfs_write_inode_size_to_header(struct file *lower_file, if (rc < 0) ecryptfs_printk(KERN_ERR, "Error commiting header page " "write\n"); - if (rc == AOP_TRUNCATED_PAGE) + if (rc == AOP_TRUNCATED_PAGE) { ecryptfs_release_lower_page(header_page, 0); - else + goto retry; + } else ecryptfs_release_lower_page(header_page, 1); lower_inode->i_mtime = lower_inode->i_ctime = CURRENT_TIME; mark_inode_dirty_sync(inode); @@ -502,7 +505,8 @@ static int ecryptfs_write_inode_size_to_xattr(struct inode *lower_inode, goto out; } lower_dentry = ecryptfs_dentry_to_lower(ecryptfs_dentry); - if (!lower_dentry->d_inode->i_op->getxattr) { + if (!lower_dentry->d_inode->i_op->getxattr || + !lower_dentry->d_inode->i_op->setxattr) { printk(KERN_WARNING "No support for setting xattr in lower filesystem\n"); rc = -ENOSYS; @@ -564,6 +568,7 @@ int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, { int rc = 0; +retry: *lower_page = grab_cache_page(lower_inode->i_mapping, lower_page_index); if (!(*lower_page)) { rc = -EINVAL; @@ -577,18 +582,18 @@ int ecryptfs_get_lower_page(struct page **lower_page, struct inode *lower_inode, byte_offset, region_bytes); if (rc) { - ecryptfs_printk(KERN_ERR, "prepare_write for " + if (rc == AOP_TRUNCATED_PAGE) { + ecryptfs_release_lower_page(*lower_page, 0); + goto retry; + } else { + ecryptfs_printk(KERN_ERR, "prepare_write for " "lower_page_index = [0x%.16x] failed; rc = " "[%d]\n", lower_page_index, rc); - } -out: - if (rc && (*lower_page)) { - if (rc == AOP_TRUNCATED_PAGE) - ecryptfs_release_lower_page(*lower_page, 0); - else ecryptfs_release_lower_page(*lower_page, 1); - (*lower_page) = NULL; + (*lower_page) = NULL; + } } +out: return rc; } |