switch ecryptfs_write() to struct inode *, kill on-stack fake files
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 84dd2f8..0032a9f 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -731,8 +731,7 @@
int ecryptfs_write_lower_page_segment(struct inode *ecryptfs_inode,
struct page *page_for_lower,
size_t offset_in_page, size_t size);
-int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
- size_t size);
+int ecryptfs_write(struct inode *inode, char *data, loff_t offset, size_t size);
int ecryptfs_read_lower(char *data, loff_t offset, size_t size,
struct inode *ecryptfs_inode);
int ecryptfs_read_lower_page_segment(struct page *page_for_ecryptfs,
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index e2d4418..65dee2f 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -142,19 +142,10 @@
static int grow_file(struct dentry *ecryptfs_dentry)
{
struct inode *ecryptfs_inode = ecryptfs_dentry->d_inode;
- struct file fake_file;
- struct ecryptfs_file_info tmp_file_info;
char zero_virt[] = { 0x00 };
int rc = 0;
- memset(&fake_file, 0, sizeof(fake_file));
- fake_file.f_path.dentry = ecryptfs_dentry;
- memset(&tmp_file_info, 0, sizeof(tmp_file_info));
- ecryptfs_set_file_private(&fake_file, &tmp_file_info);
- ecryptfs_set_file_lower(
- &fake_file,
- ecryptfs_inode_to_private(ecryptfs_inode)->lower_file);
- rc = ecryptfs_write(&fake_file, zero_virt, 0, 1);
+ rc = ecryptfs_write(ecryptfs_inode, zero_virt, 0, 1);
i_size_write(ecryptfs_inode, 0);
rc = ecryptfs_write_inode_size_to_metadata(ecryptfs_inode);
ecryptfs_inode_to_private(ecryptfs_inode)->crypt_stat.flags |=
@@ -784,8 +775,6 @@
{
int rc = 0;
struct inode *inode = dentry->d_inode;
- struct dentry *lower_dentry;
- struct file fake_ecryptfs_file;
struct ecryptfs_crypt_stat *crypt_stat;
loff_t i_size = i_size_read(inode);
loff_t lower_size_before_truncate;
@@ -796,23 +785,6 @@
goto out;
}
crypt_stat = &ecryptfs_inode_to_private(dentry->d_inode)->crypt_stat;
- /* Set up a fake ecryptfs file, this is used to interface with
- * the file in the underlying filesystem so that the
- * truncation has an effect there as well. */
- memset(&fake_ecryptfs_file, 0, sizeof(fake_ecryptfs_file));
- fake_ecryptfs_file.f_path.dentry = dentry;
- /* Released at out_free: label */
- ecryptfs_set_file_private(&fake_ecryptfs_file,
- kmem_cache_alloc(ecryptfs_file_info_cache,
- GFP_KERNEL));
- if (unlikely(!ecryptfs_file_to_private(&fake_ecryptfs_file))) {
- rc = -ENOMEM;
- goto out;
- }
- lower_dentry = ecryptfs_dentry_to_lower(dentry);
- ecryptfs_set_file_lower(
- &fake_ecryptfs_file,
- ecryptfs_inode_to_private(dentry->d_inode)->lower_file);
/* Switch on growing or shrinking file */
if (ia->ia_size > i_size) {
char zero[] = { 0x00 };
@@ -822,7 +794,7 @@
* this triggers code that will fill in 0's throughout
* the intermediate portion of the previous end of the
* file and the new and of the file */
- rc = ecryptfs_write(&fake_ecryptfs_file, zero,
+ rc = ecryptfs_write(inode, zero,
(ia->ia_size - 1), 1);
} else { /* ia->ia_size < i_size_read(inode) */
/* We're chopping off all the pages down to the page
@@ -835,10 +807,10 @@
if (!(crypt_stat->flags & ECRYPTFS_ENCRYPTED)) {
rc = vmtruncate(inode, ia->ia_size);
if (rc)
- goto out_free;
+ goto out;
lower_ia->ia_size = ia->ia_size;
lower_ia->ia_valid |= ATTR_SIZE;
- goto out_free;
+ goto out;
}
if (num_zeros) {
char *zeros_virt;
@@ -846,16 +818,16 @@
zeros_virt = kzalloc(num_zeros, GFP_KERNEL);
if (!zeros_virt) {
rc = -ENOMEM;
- goto out_free;
+ goto out;
}
- rc = ecryptfs_write(&fake_ecryptfs_file, zeros_virt,
+ rc = ecryptfs_write(inode, zeros_virt,
ia->ia_size, num_zeros);
kfree(zeros_virt);
if (rc) {
printk(KERN_ERR "Error attempting to zero out "
"the remainder of the end page on "
"reducing truncate; rc = [%d]\n", rc);
- goto out_free;
+ goto out;
}
}
vmtruncate(inode, ia->ia_size);
@@ -864,7 +836,7 @@
printk(KERN_ERR "Problem with "
"ecryptfs_write_inode_size_to_metadata; "
"rc = [%d]\n", rc);
- goto out_free;
+ goto out;
}
/* We are reducing the size of the ecryptfs file, and need to
* know if we need to reduce the size of the lower file. */
@@ -878,10 +850,6 @@
} else
lower_ia->ia_valid &= ~ATTR_SIZE;
}
-out_free:
- if (ecryptfs_file_to_private(&fake_ecryptfs_file))
- kmem_cache_free(ecryptfs_file_info_cache,
- ecryptfs_file_to_private(&fake_ecryptfs_file));
out:
return rc;
}
diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c
index 3cc17a9..db184ef 100644
--- a/fs/ecryptfs/read_write.c
+++ b/fs/ecryptfs/read_write.c
@@ -93,7 +93,7 @@
/**
* ecryptfs_write
- * @ecryptfs_file: The eCryptfs file into which to write
+ * @ecryptfs_inode: The eCryptfs file into which to write
* @data: Virtual address where data to write is located
* @offset: Offset in the eCryptfs file at which to begin writing the
* data from @data
@@ -109,12 +109,11 @@
*
* Returns zero on success; non-zero otherwise
*/
-int ecryptfs_write(struct file *ecryptfs_file, char *data, loff_t offset,
+int ecryptfs_write(struct inode *ecryptfs_inode, char *data, loff_t offset,
size_t size)
{
struct page *ecryptfs_page;
struct ecryptfs_crypt_stat *crypt_stat;
- struct inode *ecryptfs_inode = ecryptfs_file->f_dentry->d_inode;
char *ecryptfs_page_virt;
loff_t ecryptfs_file_size = i_size_read(ecryptfs_inode);
loff_t data_offset = 0;