1 files changed, 0 insertions, 661 deletions

diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c
deleted file mode 100644
index f0138674c1ed..000000000000
--- a/fs/exofs/dir.c
+++ /dev/null
@@ -1,661 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/iversion.h>
-#include "exofs.h"
-
-static inline unsigned exofs_chunk_size(struct inode *inode)
-{
-	return inode->i_sb->s_blocksize;
-}
-
-static inline void exofs_put_page(struct page *page)
-{
-	kunmap(page);
-	put_page(page);
-}
-
-static unsigned exofs_last_byte(struct inode *inode, unsigned long page_nr)
-{
-	loff_t last_byte = inode->i_size;
-
-	last_byte -= page_nr << PAGE_SHIFT;
-	if (last_byte > PAGE_SIZE)
-		last_byte = PAGE_SIZE;
-	return last_byte;
-}
-
-static int exofs_commit_chunk(struct page *page, loff_t pos, unsigned len)
-{
-	struct address_space *mapping = page->mapping;
-	struct inode *dir = mapping->host;
-	int err = 0;
-
-	inode_inc_iversion(dir);
-
-	if (!PageUptodate(page))
-		SetPageUptodate(page);
-
-	if (pos+len > dir->i_size) {
-		i_size_write(dir, pos+len);
-		mark_inode_dirty(dir);
-	}
-	set_page_dirty(page);
-
-	if (IS_DIRSYNC(dir))
-		err = write_one_page(page);
-	else
-		unlock_page(page);
-
-	return err;
-}
-
-static bool exofs_check_page(struct page *page)
-{
-	struct inode *dir = page->mapping->host;
-	unsigned chunk_size = exofs_chunk_size(dir);
-	char *kaddr = page_address(page);
-	unsigned offs, rec_len;
-	unsigned limit = PAGE_SIZE;
-	struct exofs_dir_entry *p;
-	char *error;
-
-	/* if the page is the last one in the directory */
-	if ((dir->i_size >> PAGE_SHIFT) == page->index) {
-		limit = dir->i_size & ~PAGE_MASK;
-		if (limit & (chunk_size - 1))
-			goto Ebadsize;
-		if (!limit)
-			goto out;
-	}
-	for (offs = 0; offs <= limit - EXOFS_DIR_REC_LEN(1); offs += rec_len) {
-		p = (struct exofs_dir_entry *)(kaddr + offs);
-		rec_len = le16_to_cpu(p->rec_len);
-
-		if (rec_len < EXOFS_DIR_REC_LEN(1))
-			goto Eshort;
-		if (rec_len & 3)
-			goto Ealign;
-		if (rec_len < EXOFS_DIR_REC_LEN(p->name_len))
-			goto Enamelen;
-		if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
-			goto Espan;
-	}
-	if (offs != limit)
-		goto Eend;
-out:
-	SetPageChecked(page);
-	return true;
-
-Ebadsize:
-	EXOFS_ERR("ERROR [exofs_check_page]: "
-		"size of directory(0x%lx) is not a multiple of chunk size\n",
-		dir->i_ino
-	);
-	goto fail;
-Eshort:
-	error = "rec_len is smaller than minimal";
-	goto bad_entry;
-Ealign:
-	error = "unaligned directory entry";
-	goto bad_entry;
-Enamelen:
-	error = "rec_len is too small for name_len";
-	goto bad_entry;
-Espan:
-	error = "directory entry across blocks";
-	goto bad_entry;
-bad_entry:
-	EXOFS_ERR(
-		"ERROR [exofs_check_page]: bad entry in directory(0x%lx): %s - "
-		"offset=%lu, inode=0x%llx, rec_len=%d, name_len=%d\n",
-		dir->i_ino, error, (page->index<<PAGE_SHIFT)+offs,
-		_LLU(le64_to_cpu(p->inode_no)),
-		rec_len, p->name_len);
-	goto fail;
-Eend:
-	p = (struct exofs_dir_entry *)(kaddr + offs);
-	EXOFS_ERR("ERROR [exofs_check_page]: "
-		"entry in directory(0x%lx) spans the page boundary"
-		"offset=%lu, inode=0x%llx\n",
-		dir->i_ino, (page->index<<PAGE_SHIFT)+offs,
-		_LLU(le64_to_cpu(p->inode_no)));
-fail:
-	SetPageError(page);
-	return false;
-}
-
-static struct page *exofs_get_page(struct inode *dir, unsigned long n)
-{
-	struct address_space *mapping = dir->i_mapping;
-	struct page *page = read_mapping_page(mapping, n, NULL);
-
-	if (!IS_ERR(page)) {
-		kmap(page);
-		if (unlikely(!PageChecked(page))) {
-			if (PageError(page) || !exofs_check_page(page))
-				goto fail;
-		}
-	}
-	return page;
-
-fail:
-	exofs_put_page(page);
-	return ERR_PTR(-EIO);
-}
-
-static inline int exofs_match(int len, const unsigned char *name,
-					struct exofs_dir_entry *de)
-{
-	if (len != de->name_len)
-		return 0;
-	if (!de->inode_no)
-		return 0;
-	return !memcmp(name, de->name, len);
-}
-
-static inline
-struct exofs_dir_entry *exofs_next_entry(struct exofs_dir_entry *p)
-{
-	return (struct exofs_dir_entry *)((char *)p + le16_to_cpu(p->rec_len));
-}
-
-static inline unsigned
-exofs_validate_entry(char *base, unsigned offset, unsigned mask)
-{
-	struct exofs_dir_entry *de = (struct exofs_dir_entry *)(base + offset);
-	struct exofs_dir_entry *p =
-			(struct exofs_dir_entry *)(base + (offset&mask));
-	while ((char *)p < (char *)de) {
-		if (p->rec_len == 0)
-			break;
-		p = exofs_next_entry(p);
-	}
-	return (char *)p - base;
-}
-
-static unsigned char exofs_filetype_table[EXOFS_FT_MAX] = {
-	[EXOFS_FT_UNKNOWN]	= DT_UNKNOWN,
-	[EXOFS_FT_REG_FILE]	= DT_REG,
-	[EXOFS_FT_DIR]		= DT_DIR,
-	[EXOFS_FT_CHRDEV]	= DT_CHR,
-	[EXOFS_FT_BLKDEV]	= DT_BLK,
-	[EXOFS_FT_FIFO]		= DT_FIFO,
-	[EXOFS_FT_SOCK]		= DT_SOCK,
-	[EXOFS_FT_SYMLINK]	= DT_LNK,
-};
-
-#define S_SHIFT 12
-static unsigned char exofs_type_by_mode[S_IFMT >> S_SHIFT] = {
-	[S_IFREG >> S_SHIFT]	= EXOFS_FT_REG_FILE,
-	[S_IFDIR >> S_SHIFT]	= EXOFS_FT_DIR,
-	[S_IFCHR >> S_SHIFT]	= EXOFS_FT_CHRDEV,
-	[S_IFBLK >> S_SHIFT]	= EXOFS_FT_BLKDEV,
-	[S_IFIFO >> S_SHIFT]	= EXOFS_FT_FIFO,
-	[S_IFSOCK >> S_SHIFT]	= EXOFS_FT_SOCK,
-	[S_IFLNK >> S_SHIFT]	= EXOFS_FT_SYMLINK,
-};
-
-static inline
-void exofs_set_de_type(struct exofs_dir_entry *de, struct inode *inode)
-{
-	umode_t mode = inode->i_mode;
-	de->file_type = exofs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
-}
-
-static int
-exofs_readdir(struct file *file, struct dir_context *ctx)
-{
-	loff_t pos = ctx->pos;
-	struct inode *inode = file_inode(file);
-	unsigned int offset = pos & ~PAGE_MASK;
-	unsigned long n = pos >> PAGE_SHIFT;
-	unsigned long npages = dir_pages(inode);
-	unsigned chunk_mask = ~(exofs_chunk_size(inode)-1);
-	bool need_revalidate = !inode_eq_iversion(inode, file->f_version);
-
-	if (pos > inode->i_size - EXOFS_DIR_REC_LEN(1))
-		return 0;
-
-	for ( ; n < npages; n++, offset = 0) {
-		char *kaddr, *limit;
-		struct exofs_dir_entry *de;
-		struct page *page = exofs_get_page(inode, n);
-
-		if (IS_ERR(page)) {
-			EXOFS_ERR("ERROR: bad page in directory(0x%lx)\n",
-				  inode->i_ino);
-			ctx->pos += PAGE_SIZE - offset;
-			return PTR_ERR(page);
-		}
-		kaddr = page_address(page);
-		if (unlikely(need_revalidate)) {
-			if (offset) {
-				offset = exofs_validate_entry(kaddr, offset,
-								chunk_mask);
-				ctx->pos = (n<<PAGE_SHIFT) + offset;
-			}
-			file->f_version = inode_query_iversion(inode);
-			need_revalidate = false;
-		}
-		de = (struct exofs_dir_entry *)(kaddr + offset);
-		limit = kaddr + exofs_last_byte(inode, n) -
-							EXOFS_DIR_REC_LEN(1);
-		for (; (char *)de <= limit; de = exofs_next_entry(de)) {
-			if (de->rec_len == 0) {
-				EXOFS_ERR("ERROR: "
-				     "zero-length entry in directory(0x%lx)\n",
-				     inode->i_ino);
-				exofs_put_page(page);
-				return -EIO;
-			}
-			if (de->inode_no) {
-				unsigned char t;
-
-				if (de->file_type < EXOFS_FT_MAX)
-					t = exofs_filetype_table[de->file_type];
-				else
-					t = DT_UNKNOWN;
-
-				if (!dir_emit(ctx, de->name, de->name_len,
-						le64_to_cpu(de->inode_no),
-						t)) {
-					exofs_put_page(page);
-					return 0;
-				}
-			}
-			ctx->pos += le16_to_cpu(de->rec_len);
-		}
-		exofs_put_page(page);
-	}
-	return 0;
-}
-
-struct exofs_dir_entry *exofs_find_entry(struct inode *dir,
-			struct dentry *dentry, struct page **res_page)
-{
-	const unsigned char *name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
-	unsigned reclen = EXOFS_DIR_REC_LEN(namelen);
-	unsigned long start, n;
-	unsigned long npages = dir_pages(dir);
-	struct page *page = NULL;
-	struct exofs_i_info *oi = exofs_i(dir);
-	struct exofs_dir_entry *de;
-
-	if (npages == 0)
-		goto out;
-
-	*res_page = NULL;
-
-	start = oi->i_dir_start_lookup;
-	if (start >= npages)
-		start = 0;
-	n = start;
-	do {
-		char *kaddr;
-		page = exofs_get_page(dir, n);
-		if (!IS_ERR(page)) {
-			kaddr = page_address(page);
-			de = (struct exofs_dir_entry *) kaddr;
-			kaddr += exofs_last_byte(dir, n) - reclen;
-			while ((char *) de <= kaddr) {
-				if (de->rec_len == 0) {
-					EXOFS_ERR("ERROR: zero-length entry in "
-						  "directory(0x%lx)\n",
-						  dir->i_ino);
-					exofs_put_page(page);
-					goto out;
-				}
-				if (exofs_match(namelen, name, de))
-					goto found;
-				de = exofs_next_entry(de);
-			}
-			exofs_put_page(page);
-		}
-		if (++n >= npages)
-			n = 0;
-	} while (n != start);
-out:
-	return NULL;
-
-found:
-	*res_page = page;
-	oi->i_dir_start_lookup = n;
-	return de;
-}
-
-struct exofs_dir_entry *exofs_dotdot(struct inode *dir, struct page **p)
-{
-	struct page *page = exofs_get_page(dir, 0);
-	struct exofs_dir_entry *de = NULL;
-
-	if (!IS_ERR(page)) {
-		de = exofs_next_entry(
-				(struct exofs_dir_entry *)page_address(page));
-		*p = page;
-	}
-	return de;
-}
-
-ino_t exofs_parent_ino(struct dentry *child)
-{
-	struct page *page;
-	struct exofs_dir_entry *de;
-	ino_t ino;
-
-	de = exofs_dotdot(d_inode(child), &page);
-	if (!de)
-		return 0;
-
-	ino = le64_to_cpu(de->inode_no);
-	exofs_put_page(page);
-	return ino;
-}
-
-ino_t exofs_inode_by_name(struct inode *dir, struct dentry *dentry)
-{
-	ino_t res = 0;
-	struct exofs_dir_entry *de;
-	struct page *page;
-
-	de = exofs_find_entry(dir, dentry, &page);
-	if (de) {
-		res = le64_to_cpu(de->inode_no);
-		exofs_put_page(page);
-	}
-	return res;
-}
-
-int exofs_set_link(struct inode *dir, struct exofs_dir_entry *de,
-			struct page *page, struct inode *inode)
-{
-	loff_t pos = page_offset(page) +
-			(char *) de - (char *) page_address(page);
-	unsigned len = le16_to_cpu(de->rec_len);
-	int err;
-
-	lock_page(page);
-	err = exofs_write_begin(NULL, page->mapping, pos, len, 0, &page, NULL);
-	if (err)
-		EXOFS_ERR("exofs_set_link: exofs_write_begin FAILED => %d\n",
-			  err);
-
-	de->inode_no = cpu_to_le64(inode->i_ino);
-	exofs_set_de_type(de, inode);
-	if (likely(!err))
-		err = exofs_commit_chunk(page, pos, len);
-	exofs_put_page(page);
-	dir->i_mtime = dir->i_ctime = current_time(dir);
-	mark_inode_dirty(dir);
-	return err;
-}
-
-int exofs_add_link(struct dentry *dentry, struct inode *inode)
-{
-	struct inode *dir = d_inode(dentry->d_parent);
-	const unsigned char *name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
-	unsigned chunk_size = exofs_chunk_size(dir);
-	unsigned reclen = EXOFS_DIR_REC_LEN(namelen);
-	unsigned short rec_len, name_len;
-	struct page *page = NULL;
-	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
-	struct exofs_dir_entry *de;
-	unsigned long npages = dir_pages(dir);
-	unsigned long n;
-	char *kaddr;
-	loff_t pos;
-	int err;
-
-	for (n = 0; n <= npages; n++) {
-		char *dir_end;
-
-		page = exofs_get_page(dir, n);
-		err = PTR_ERR(page);
-		if (IS_ERR(page))
-			goto out;
-		lock_page(page);
-		kaddr = page_address(page);
-		dir_end = kaddr + exofs_last_byte(dir, n);
-		de = (struct exofs_dir_entry *)kaddr;
-		kaddr += PAGE_SIZE - reclen;
-		while ((char *)de <= kaddr) {
-			if ((char *)de == dir_end) {
-				name_len = 0;
-				rec_len = chunk_size;
-				de->rec_len = cpu_to_le16(chunk_size);
-				de->inode_no = 0;
-				goto got_it;
-			}
-			if (de->rec_len == 0) {
-				EXOFS_ERR("ERROR: exofs_add_link: "
-				      "zero-length entry in directory(0x%lx)\n",
-				      inode->i_ino);
-				err = -EIO;
-				goto out_unlock;
-			}
-			err = -EEXIST;
-			if (exofs_match(namelen, name, de))
-				goto out_unlock;
-			name_len = EXOFS_DIR_REC_LEN(de->name_len);
-			rec_len = le16_to_cpu(de->rec_len);
-			if (!de->inode_no && rec_len >= reclen)
-				goto got_it;
-			if (rec_len >= name_len + reclen)
-				goto got_it;
-			de = (struct exofs_dir_entry *) ((char *) de + rec_len);
-		}
-		unlock_page(page);
-		exofs_put_page(page);
-	}
-
-	EXOFS_ERR("exofs_add_link: BAD dentry=%p or inode=0x%lx\n",
-		  dentry, inode->i_ino);
-	return -EINVAL;
-
-got_it:
-	pos = page_offset(page) +
-		(char *)de - (char *)page_address(page);
-	err = exofs_write_begin(NULL, page->mapping, pos, rec_len, 0,
-							&page, NULL);
-	if (err)
-		goto out_unlock;
-	if (de->inode_no) {
-		struct exofs_dir_entry *de1 =
-			(struct exofs_dir_entry *)((char *)de + name_len);
-		de1->rec_len = cpu_to_le16(rec_len - name_len);
-		de->rec_len = cpu_to_le16(name_len);
-		de = de1;
-	}
-	de->name_len = namelen;
-	memcpy(de->name, name, namelen);
-	de->inode_no = cpu_to_le64(inode->i_ino);
-	exofs_set_de_type(de, inode);
-	err = exofs_commit_chunk(page, pos, rec_len);
-	dir->i_mtime = dir->i_ctime = current_time(dir);
-	mark_inode_dirty(dir);
-	sbi->s_numfiles++;
-
-out_put:
-	exofs_put_page(page);
-out:
-	return err;
-out_unlock:
-	unlock_page(page);
-	goto out_put;
-}
-
-int exofs_delete_entry(struct exofs_dir_entry *dir, struct page *page)
-{
-	struct address_space *mapping = page->mapping;
-	struct inode *inode = mapping->host;
-	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
-	char *kaddr = page_address(page);
-	unsigned from = ((char *)dir - kaddr) & ~(exofs_chunk_size(inode)-1);
-	unsigned to = ((char *)dir - kaddr) + le16_to_cpu(dir->rec_len);
-	loff_t pos;
-	struct exofs_dir_entry *pde = NULL;
-	struct exofs_dir_entry *de = (struct exofs_dir_entry *) (kaddr + from);
-	int err;
-
-	while (de < dir) {
-		if (de->rec_len == 0) {
-			EXOFS_ERR("ERROR: exofs_delete_entry:"
-				  "zero-length entry in directory(0x%lx)\n",
-				  inode->i_ino);
-			err = -EIO;
-			goto out;
-		}
-		pde = de;
-		de = exofs_next_entry(de);
-	}
-	if (pde)
-		from = (char *)pde - (char *)page_address(page);
-	pos = page_offset(page) + from;
-	lock_page(page);
-	err = exofs_write_begin(NULL, page->mapping, pos, to - from, 0,
-							&page, NULL);
-	if (err)
-		EXOFS_ERR("exofs_delete_entry: exofs_write_begin FAILED => %d\n",
-			  err);
-	if (pde)
-		pde->rec_len = cpu_to_le16(to - from);
-	dir->inode_no = 0;
-	if (likely(!err))
-		err = exofs_commit_chunk(page, pos, to - from);
-	inode->i_ctime = inode->i_mtime = current_time(inode);
-	mark_inode_dirty(inode);
-	sbi->s_numfiles--;
-out:
-	exofs_put_page(page);
-	return err;
-}
-
-/* kept aligned on 4 bytes */
-#define THIS_DIR ".\0\0"
-#define PARENT_DIR "..\0"
-
-int exofs_make_empty(struct inode *inode, struct inode *parent)
-{
-	struct address_space *mapping = inode->i_mapping;
-	struct page *page = grab_cache_page(mapping, 0);
-	unsigned chunk_size = exofs_chunk_size(inode);
-	struct exofs_dir_entry *de;
-	int err;
-	void *kaddr;
-
-	if (!page)
-		return -ENOMEM;
-
-	err = exofs_write_begin(NULL, page->mapping, 0, chunk_size, 0,
-							&page, NULL);
-	if (err) {
-		unlock_page(page);
-		goto fail;
-	}
-
-	kaddr = kmap_atomic(page);
-	de = (struct exofs_dir_entry *)kaddr;
-	de->name_len = 1;
-	de->rec_len = cpu_to_le16(EXOFS_DIR_REC_LEN(1));
-	memcpy(de->name, THIS_DIR, sizeof(THIS_DIR));
-	de->inode_no = cpu_to_le64(inode->i_ino);
-	exofs_set_de_type(de, inode);
-
-	de = (struct exofs_dir_entry *)(kaddr + EXOFS_DIR_REC_LEN(1));
-	de->name_len = 2;
-	de->rec_len = cpu_to_le16(chunk_size - EXOFS_DIR_REC_LEN(1));
-	de->inode_no = cpu_to_le64(parent->i_ino);
-	memcpy(de->name, PARENT_DIR, sizeof(PARENT_DIR));
-	exofs_set_de_type(de, inode);
-	kunmap_atomic(kaddr);
-	err = exofs_commit_chunk(page, 0, chunk_size);
-fail:
-	put_page(page);
-	return err;
-}
-
-int exofs_empty_dir(struct inode *inode)
-{
-	struct page *page = NULL;
-	unsigned long i, npages = dir_pages(inode);
-
-	for (i = 0; i < npages; i++) {
-		char *kaddr;
-		struct exofs_dir_entry *de;
-		page = exofs_get_page(inode, i);
-
-		if (IS_ERR(page))
-			continue;
-
-		kaddr = page_address(page);
-		de = (struct exofs_dir_entry *)kaddr;
-		kaddr += exofs_last_byte(inode, i) - EXOFS_DIR_REC_LEN(1);
-
-		while ((char *)de <= kaddr) {
-			if (de->rec_len == 0) {
-				EXOFS_ERR("ERROR: exofs_empty_dir: "
-					  "zero-length directory entry"
-					  "kaddr=%p, de=%p\n", kaddr, de);
-				goto not_empty;
-			}
-			if (de->inode_no != 0) {
-				/* check for . and .. */
-				if (de->name[0] != '.')
-					goto not_empty;
-				if (de->name_len > 2)
-					goto not_empty;
-				if (de->name_len < 2) {
-					if (le64_to_cpu(de->inode_no) !=
-					    inode->i_ino)
-						goto not_empty;
-				} else if (de->name[1] != '.')
-					goto not_empty;
-			}
-			de = exofs_next_entry(de);
-		}
-		exofs_put_page(page);
-	}
-	return 1;
-
-not_empty:
-	exofs_put_page(page);
-	return 0;
-}
-
-const struct file_operations exofs_dir_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= generic_read_dir,
-	.iterate_shared	= exofs_readdir,
-};