1 files changed, 0 insertions, 332 deletions

diff --git a/drivers/staging/erofs/inode.c b/drivers/staging/erofs/inode.c
deleted file mode 100644
index 4c3d8bf8d249..000000000000
--- a/drivers/staging/erofs/inode.c
+++ /dev/null
@@ -1,332 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/drivers/staging/erofs/inode.c
- *
- * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
- * Created by Gao Xiang <gaoxiang25@huawei.com>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of the Linux
- * distribution for more details.
- */
-#include "xattr.h"
-
-#include <trace/events/erofs.h>
-
-/* no locking */
-static int read_inode(struct inode *inode, void *data)
-{
-	struct erofs_vnode *vi = EROFS_V(inode);
-	struct erofs_inode_v1 *v1 = data;
-	const unsigned int advise = le16_to_cpu(v1->i_advise);
-	erofs_blk_t nblks = 0;
-
-	vi->datamode = __inode_data_mapping(advise);
-
-	if (unlikely(vi->datamode >= EROFS_INODE_LAYOUT_MAX)) {
-		errln("unsupported data mapping %u of nid %llu",
-		      vi->datamode, vi->nid);
-		DBG_BUGON(1);
-		return -EIO;
-	}
-
-	if (__inode_version(advise) == EROFS_INODE_LAYOUT_V2) {
-		struct erofs_inode_v2 *v2 = data;
-
-		vi->inode_isize = sizeof(struct erofs_inode_v2);
-		vi->xattr_isize = ondisk_xattr_ibody_size(v2->i_xattr_icount);
-
-		inode->i_mode = le16_to_cpu(v2->i_mode);
-		if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-		    S_ISLNK(inode->i_mode)) {
-			vi->raw_blkaddr = le32_to_cpu(v2->i_u.raw_blkaddr);
-		} else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
-			inode->i_rdev =
-				new_decode_dev(le32_to_cpu(v2->i_u.rdev));
-		} else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
-			inode->i_rdev = 0;
-		} else {
-			return -EIO;
-		}
-
-		i_uid_write(inode, le32_to_cpu(v2->i_uid));
-		i_gid_write(inode, le32_to_cpu(v2->i_gid));
-		set_nlink(inode, le32_to_cpu(v2->i_nlink));
-
-		/* ns timestamp */
-		inode->i_mtime.tv_sec = inode->i_ctime.tv_sec =
-			le64_to_cpu(v2->i_ctime);
-		inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec =
-			le32_to_cpu(v2->i_ctime_nsec);
-
-		inode->i_size = le64_to_cpu(v2->i_size);
-
-		/* total blocks for compressed files */
-		if (is_inode_layout_compression(inode))
-			nblks = le32_to_cpu(v2->i_u.compressed_blocks);
-	} else if (__inode_version(advise) == EROFS_INODE_LAYOUT_V1) {
-		struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb);
-
-		vi->inode_isize = sizeof(struct erofs_inode_v1);
-		vi->xattr_isize = ondisk_xattr_ibody_size(v1->i_xattr_icount);
-
-		inode->i_mode = le16_to_cpu(v1->i_mode);
-		if (S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
-		    S_ISLNK(inode->i_mode)) {
-			vi->raw_blkaddr = le32_to_cpu(v1->i_u.raw_blkaddr);
-		} else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
-			inode->i_rdev =
-				new_decode_dev(le32_to_cpu(v1->i_u.rdev));
-		} else if (S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
-			inode->i_rdev = 0;
-		} else {
-			return -EIO;
-		}
-
-		i_uid_write(inode, le16_to_cpu(v1->i_uid));
-		i_gid_write(inode, le16_to_cpu(v1->i_gid));
-		set_nlink(inode, le16_to_cpu(v1->i_nlink));
-
-		/* use build time to derive all file time */
-		inode->i_mtime.tv_sec = inode->i_ctime.tv_sec =
-			sbi->build_time;
-		inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec =
-			sbi->build_time_nsec;
-
-		inode->i_size = le32_to_cpu(v1->i_size);
-		if (is_inode_layout_compression(inode))
-			nblks = le32_to_cpu(v1->i_u.compressed_blocks);
-	} else {
-		errln("unsupported on-disk inode version %u of nid %llu",
-		      __inode_version(advise), vi->nid);
-		DBG_BUGON(1);
-		return -EIO;
-	}
-
-	if (!nblks)
-		/* measure inode.i_blocks as generic filesystems */
-		inode->i_blocks = roundup(inode->i_size, EROFS_BLKSIZ) >> 9;
-	else
-		inode->i_blocks = nblks << LOG_SECTORS_PER_BLOCK;
-	return 0;
-}
-
-/*
- * try_lock can be required since locking order is:
- *   file data(fs_inode)
- *        meta(bd_inode)
- * but the majority of the callers is "iget",
- * in that case we are pretty sure no deadlock since
- * no data operations exist. However I tend to
- * try_lock since it takes no much overhead and
- * will success immediately.
- */
-static int fill_inline_data(struct inode *inode, void *data,
-			    unsigned int m_pofs)
-{
-	struct erofs_vnode *vi = EROFS_V(inode);
-	struct erofs_sb_info *sbi = EROFS_I_SB(inode);
-
-	/* should be inode inline C */
-	if (!is_inode_flat_inline(inode))
-		return 0;
-
-	/* fast symlink (following ext4) */
-	if (S_ISLNK(inode->i_mode) && inode->i_size < PAGE_SIZE) {
-		char *lnk = erofs_kmalloc(sbi, inode->i_size + 1, GFP_KERNEL);
-
-		if (unlikely(!lnk))
-			return -ENOMEM;
-
-		m_pofs += vi->inode_isize + vi->xattr_isize;
-
-		/* inline symlink data shouldn't across page boundary as well */
-		if (unlikely(m_pofs + inode->i_size > PAGE_SIZE)) {
-			DBG_BUGON(1);
-			kfree(lnk);
-			return -EIO;
-		}
-
-		/* get in-page inline data */
-		memcpy(lnk, data + m_pofs, inode->i_size);
-		lnk[inode->i_size] = '\0';
-
-		inode->i_link = lnk;
-		set_inode_fast_symlink(inode);
-	}
-	return 0;
-}
-
-static int fill_inode(struct inode *inode, int isdir)
-{
-	struct erofs_sb_info *sbi = EROFS_SB(inode->i_sb);
-	struct erofs_vnode *vi = EROFS_V(inode);
-	struct page *page;
-	void *data;
-	int err;
-	erofs_blk_t blkaddr;
-	unsigned int ofs;
-
-	trace_erofs_fill_inode(inode, isdir);
-
-	blkaddr = erofs_blknr(iloc(sbi, vi->nid));
-	ofs = erofs_blkoff(iloc(sbi, vi->nid));
-
-	debugln("%s, reading inode nid %llu at %u of blkaddr %u",
-		__func__, vi->nid, ofs, blkaddr);
-
-	page = erofs_get_meta_page(inode->i_sb, blkaddr, isdir);
-
-	if (IS_ERR(page)) {
-		errln("failed to get inode (nid: %llu) page, err %ld",
-		      vi->nid, PTR_ERR(page));
-		return PTR_ERR(page);
-	}
-
-	DBG_BUGON(!PageUptodate(page));
-	data = page_address(page);
-
-	err = read_inode(inode, data + ofs);
-	if (!err) {
-		/* setup the new inode */
-		if (S_ISREG(inode->i_mode)) {
-			inode->i_op = &erofs_generic_iops;
-			inode->i_fop = &generic_ro_fops;
-		} else if (S_ISDIR(inode->i_mode)) {
-			inode->i_op = &erofs_dir_iops;
-			inode->i_fop = &erofs_dir_fops;
-		} else if (S_ISLNK(inode->i_mode)) {
-			/* by default, page_get_link is used for symlink */
-			inode->i_op = &erofs_symlink_iops;
-			inode_nohighmem(inode);
-		} else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
-			S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
-			inode->i_op = &erofs_generic_iops;
-			init_special_inode(inode, inode->i_mode, inode->i_rdev);
-			goto out_unlock;
-		} else {
-			err = -EIO;
-			goto out_unlock;
-		}
-
-		if (is_inode_layout_compression(inode)) {
-			err = z_erofs_fill_inode(inode);
-			goto out_unlock;
-		}
-
-		inode->i_mapping->a_ops = &erofs_raw_access_aops;
-
-		/* fill last page if inline data is available */
-		err = fill_inline_data(inode, data, ofs);
-	}
-
-out_unlock:
-	unlock_page(page);
-	put_page(page);
-	return err;
-}
-
-/*
- * erofs nid is 64bits, but i_ino is 'unsigned long', therefore
- * we should do more for 32-bit platform to find the right inode.
- */
-#if BITS_PER_LONG == 32
-static int erofs_ilookup_test_actor(struct inode *inode, void *opaque)
-{
-	const erofs_nid_t nid = *(erofs_nid_t *)opaque;
-
-	return EROFS_V(inode)->nid == nid;
-}
-
-static int erofs_iget_set_actor(struct inode *inode, void *opaque)
-{
-	const erofs_nid_t nid = *(erofs_nid_t *)opaque;
-
-	inode->i_ino = erofs_inode_hash(nid);
-	return 0;
-}
-#endif
-
-static inline struct inode *erofs_iget_locked(struct super_block *sb,
-					      erofs_nid_t nid)
-{
-	const unsigned long hashval = erofs_inode_hash(nid);
-
-#if BITS_PER_LONG >= 64
-	/* it is safe to use iget_locked for >= 64-bit platform */
-	return iget_locked(sb, hashval);
-#else
-	return iget5_locked(sb, hashval, erofs_ilookup_test_actor,
-		erofs_iget_set_actor, &nid);
-#endif
-}
-
-struct inode *erofs_iget(struct super_block *sb,
-			 erofs_nid_t nid,
-			 bool isdir)
-{
-	struct inode *inode = erofs_iget_locked(sb, nid);
-
-	if (unlikely(!inode))
-		return ERR_PTR(-ENOMEM);
-
-	if (inode->i_state & I_NEW) {
-		int err;
-		struct erofs_vnode *vi = EROFS_V(inode);
-
-		vi->nid = nid;
-
-		err = fill_inode(inode, isdir);
-		if (likely(!err))
-			unlock_new_inode(inode);
-		else {
-			iget_failed(inode);
-			inode = ERR_PTR(err);
-		}
-	}
-	return inode;
-}
-
-int erofs_getattr(const struct path *path, struct kstat *stat,
-		  u32 request_mask, unsigned int query_flags)
-{
-	struct inode *const inode = d_inode(path->dentry);
-
-	if (is_inode_layout_compression(inode))
-		stat->attributes |= STATX_ATTR_COMPRESSED;
-
-	stat->attributes |= STATX_ATTR_IMMUTABLE;
-	stat->attributes_mask |= (STATX_ATTR_COMPRESSED |
-				  STATX_ATTR_IMMUTABLE);
-
-	generic_fillattr(inode, stat);
-	return 0;
-}
-
-const struct inode_operations erofs_generic_iops = {
-	.getattr = erofs_getattr,
-#ifdef CONFIG_EROFS_FS_XATTR
-	.listxattr = erofs_listxattr,
-#endif
-	.get_acl = erofs_get_acl,
-};
-
-const struct inode_operations erofs_symlink_iops = {
-	.get_link = page_get_link,
-	.getattr = erofs_getattr,
-#ifdef CONFIG_EROFS_FS_XATTR
-	.listxattr = erofs_listxattr,
-#endif
-	.get_acl = erofs_get_acl,
-};
-
-const struct inode_operations erofs_fast_symlink_iops = {
-	.get_link = simple_get_link,
-	.getattr = erofs_getattr,
-#ifdef CONFIG_EROFS_FS_XATTR
-	.listxattr = erofs_listxattr,
-#endif
-	.get_acl = erofs_get_acl,
-};
-