e84c93fd42
As the first step of converting hardcoded blocksize to that specified in on-disk superblock, convert all call sites of hardcoded blocksize to sb->s_blocksize except for: 1) use sbi->blkszbits instead of sb->s_blocksize in erofs_superblock_csum_verify() since sb->s_blocksize has not been updated with the on-disk blocksize yet when the function is called. 2) use inode->i_blkbits instead of sb->s_blocksize in erofs_bread(), since the inode operated on may be an anonymous inode in fscache mode. Currently the anonymous inode is allocated from an anonymous mount maintained in erofs, while in the near future we may allocate anonymous inodes from a generic API directly and thus have no access to the anonymous inode's i_sb. Thus we keep the block size in i_blkbits for anonymous inodes in fscache mode. Be noted that this patch only gets rid of the hardcoded blocksize, in preparation for actually setting the on-disk block size in the following patch. The hard limit of constraining the block size to PAGE_SIZE still exists until the next patch. Bug: 303691233 Signed-off-by: Jingbo Xu <jefflexu@linux.alibaba.com> Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com> Reviewed-by: Yue Hu <huyue2@coolpad.com> Reviewed-by: Chao Yu <chao@kernel.org> Link: https://lore.kernel.org/r/20230313135309.75269-2-jefflexu@linux.alibaba.com [ Gao Xiang: fold a patch to fix incorrect truncated offsets. ] Link: https://lore.kernel.org/r/20230413035734.15457-1-zhujia.zj@bytedance.com Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> (cherry picked from commit 3acea5fc335420ba7ef53947cf2d98d07fac39f7) [dhavale: resolved few conflicts due to missing other features] Signed-off-by: Sandeep Dhavale <dhavale@google.com> Change-Id: I4751529e42e4a646b1a2dda75981cdc41b39b6d4
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2017-2018 HUAWEI, Inc.
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* https://www.huawei.com/
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*/
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#ifndef __EROFS_XATTR_H
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#define __EROFS_XATTR_H
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#include "internal.h"
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#include <linux/posix_acl_xattr.h>
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#include <linux/xattr.h>
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/* Attribute not found */
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#define ENOATTR ENODATA
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static inline unsigned int inlinexattr_header_size(struct inode *inode)
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{
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return sizeof(struct erofs_xattr_ibody_header) +
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sizeof(u32) * EROFS_I(inode)->xattr_shared_count;
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}
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static inline erofs_blk_t xattrblock_addr(struct super_block *sb,
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unsigned int xattr_id)
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{
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#ifdef CONFIG_EROFS_FS_XATTR
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return EROFS_SB(sb)->xattr_blkaddr +
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xattr_id * sizeof(__u32) / sb->s_blocksize;
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#else
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return 0;
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#endif
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}
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static inline unsigned int xattrblock_offset(struct super_block *sb,
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unsigned int xattr_id)
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{
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return (xattr_id * sizeof(__u32)) % sb->s_blocksize;
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}
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#ifdef CONFIG_EROFS_FS_XATTR
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extern const struct xattr_handler erofs_xattr_user_handler;
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extern const struct xattr_handler erofs_xattr_trusted_handler;
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extern const struct xattr_handler erofs_xattr_security_handler;
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static inline const struct xattr_handler *erofs_xattr_handler(unsigned int idx)
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{
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static const struct xattr_handler *xattr_handler_map[] = {
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[EROFS_XATTR_INDEX_USER] = &erofs_xattr_user_handler,
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#ifdef CONFIG_EROFS_FS_POSIX_ACL
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[EROFS_XATTR_INDEX_POSIX_ACL_ACCESS] =
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&posix_acl_access_xattr_handler,
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[EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] =
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&posix_acl_default_xattr_handler,
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#endif
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[EROFS_XATTR_INDEX_TRUSTED] = &erofs_xattr_trusted_handler,
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#ifdef CONFIG_EROFS_FS_SECURITY
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[EROFS_XATTR_INDEX_SECURITY] = &erofs_xattr_security_handler,
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#endif
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};
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return idx && idx < ARRAY_SIZE(xattr_handler_map) ?
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xattr_handler_map[idx] : NULL;
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}
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extern const struct xattr_handler *erofs_xattr_handlers[];
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int erofs_getxattr(struct inode *, int, const char *, void *, size_t);
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ssize_t erofs_listxattr(struct dentry *, char *, size_t);
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#else
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static inline int erofs_getxattr(struct inode *inode, int index,
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const char *name, void *buffer,
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size_t buffer_size)
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{
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return -EOPNOTSUPP;
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}
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#define erofs_listxattr (NULL)
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#define erofs_xattr_handlers (NULL)
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#endif /* !CONFIG_EROFS_FS_XATTR */
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#ifdef CONFIG_EROFS_FS_POSIX_ACL
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struct posix_acl *erofs_get_acl(struct inode *inode, int type, bool rcu);
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#else
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#define erofs_get_acl (NULL)
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#endif
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#endif
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