From b6c1d8fcbadeb9bb4c3dbca57a007629d0483544 Mon Sep 17 00:00:00 2001 From: Michael Halcrow Date: Tue, 16 Oct 2007 01:28:13 -0700 Subject: eCryptfs: remove unused functions and kmem_cache The switch to read_write.c routines and the persistent file make a number of functions unnecessary. This patch removes them. Signed-off-by: Michael Halcrow Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ecryptfs/crypto.c | 150 --------------------------------------------------- 1 file changed, 150 deletions(-) (limited to 'fs/ecryptfs/crypto.c') diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c index 9408ea48416..a9ca373c610 100644 --- a/fs/ecryptfs/crypto.c +++ b/fs/ecryptfs/crypto.c @@ -353,119 +353,6 @@ out: return rc; } -static void -ecryptfs_extent_to_lwr_pg_idx_and_offset(unsigned long *lower_page_idx, - int *byte_offset, - struct ecryptfs_crypt_stat *crypt_stat, - unsigned long extent_num) -{ - unsigned long lower_extent_num; - int extents_occupied_by_headers_at_front; - int bytes_occupied_by_headers_at_front; - int extent_offset; - int extents_per_page; - - bytes_occupied_by_headers_at_front = - (crypt_stat->extent_size - * crypt_stat->num_header_extents_at_front); - extents_occupied_by_headers_at_front = - ( bytes_occupied_by_headers_at_front - / crypt_stat->extent_size ); - lower_extent_num = extents_occupied_by_headers_at_front + extent_num; - extents_per_page = PAGE_CACHE_SIZE / crypt_stat->extent_size; - (*lower_page_idx) = lower_extent_num / extents_per_page; - extent_offset = lower_extent_num % extents_per_page; - (*byte_offset) = extent_offset * crypt_stat->extent_size; - ecryptfs_printk(KERN_DEBUG, " * crypt_stat->extent_size = " - "[%d]\n", crypt_stat->extent_size); - ecryptfs_printk(KERN_DEBUG, " * crypt_stat->" - "num_header_extents_at_front = [%d]\n", - crypt_stat->num_header_extents_at_front); - ecryptfs_printk(KERN_DEBUG, " * extents_occupied_by_headers_at_" - "front = [%d]\n", extents_occupied_by_headers_at_front); - ecryptfs_printk(KERN_DEBUG, " * lower_extent_num = [0x%.16x]\n", - lower_extent_num); - ecryptfs_printk(KERN_DEBUG, " * extents_per_page = [%d]\n", - extents_per_page); - ecryptfs_printk(KERN_DEBUG, " * (*lower_page_idx) = [0x%.16x]\n", - (*lower_page_idx)); - ecryptfs_printk(KERN_DEBUG, " * extent_offset = [%d]\n", - extent_offset); - ecryptfs_printk(KERN_DEBUG, " * (*byte_offset) = [%d]\n", - (*byte_offset)); -} - -static int ecryptfs_write_out_page(struct ecryptfs_page_crypt_context *ctx, - struct page *lower_page, - struct inode *lower_inode, - int byte_offset_in_page, int bytes_to_write) -{ - int rc = 0; - - if (ctx->mode == ECRYPTFS_PREPARE_COMMIT_MODE) { - rc = ecryptfs_commit_lower_page(lower_page, lower_inode, - ctx->param.lower_file, - byte_offset_in_page, - bytes_to_write); - if (rc) { - ecryptfs_printk(KERN_ERR, "Error calling lower " - "commit; rc = [%d]\n", rc); - goto out; - } - } else { - rc = ecryptfs_writepage_and_release_lower_page(lower_page, - lower_inode, - ctx->param.wbc); - if (rc) { - ecryptfs_printk(KERN_ERR, "Error calling lower " - "writepage(); rc = [%d]\n", rc); - goto out; - } - } -out: - return rc; -} - -static int ecryptfs_read_in_page(struct ecryptfs_page_crypt_context *ctx, - struct page **lower_page, - struct inode *lower_inode, - unsigned long lower_page_idx, - int byte_offset_in_page) -{ - int rc = 0; - - if (ctx->mode == ECRYPTFS_PREPARE_COMMIT_MODE) { - /* TODO: Limit this to only the data extents that are - * needed */ - rc = ecryptfs_get_lower_page(lower_page, lower_inode, - ctx->param.lower_file, - lower_page_idx, - byte_offset_in_page, - (PAGE_CACHE_SIZE - - byte_offset_in_page)); - if (rc) { - ecryptfs_printk( - KERN_ERR, "Error attempting to grab, map, " - "and prepare_write lower page with index " - "[0x%.16x]; rc = [%d]\n", lower_page_idx, rc); - goto out; - } - } else { - *lower_page = grab_cache_page(lower_inode->i_mapping, - lower_page_idx); - if (!(*lower_page)) { - rc = -EINVAL; - ecryptfs_printk( - KERN_ERR, "Error attempting to grab and map " - "lower page with index [0x%.16x]; rc = [%d]\n", - lower_page_idx, rc); - goto out; - } - } -out: - return rc; -} - /** * ecryptfs_lower_offset_for_extent * @@ -1306,43 +1193,6 @@ int ecryptfs_cipher_code_to_string(char *str, u16 cipher_code) return rc; } -/** - * ecryptfs_read_header_region - * @data: The virtual address to write header region data into - * @dentry: The lower dentry - * @mnt: The lower VFS mount - * - * Returns zero on success; non-zero otherwise - */ -static int ecryptfs_read_header_region(char *data, struct dentry *dentry, - struct vfsmount *mnt) -{ - struct file *lower_file; - mm_segment_t oldfs; - int rc; - - rc = ecryptfs_open_lower_file(&lower_file, dentry, mnt, O_RDONLY); - if (rc) { - printk(KERN_ERR - "Error opening lower_file to read header region\n"); - goto out; - } - lower_file->f_pos = 0; - oldfs = get_fs(); - set_fs(get_ds()); - rc = lower_file->f_op->read(lower_file, (char __user *)data, - ECRYPTFS_DEFAULT_EXTENT_SIZE, &lower_file->f_pos); - set_fs(oldfs); - rc = ecryptfs_close_lower_file(lower_file); - if (rc) { - printk(KERN_ERR "Error closing lower_file\n"); - goto out; - } - rc = 0; -out: - return rc; -} - int ecryptfs_read_and_validate_header_region(char *data, struct inode *ecryptfs_inode) { -- cgit v1.2.3