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![Linus Torvalds](/assets/img/avatar_default.png)
- Add sub-page block size support for uncompressed files; - Support flattened block device for multi-blob images to be attached into virtual machines (including cloud servers) and bare metals; - Support long xattr name prefixes to optimize images with common xattr namespaces (e.g. files with overlayfs xattrs) use cases; - Various minor cleanups & fixes. -----BEGIN PGP SIGNATURE----- iIcEABYIAC8WIQThPAmQN9sSA0DVxtI5NzHcH7XmBAUCZETCNREceGlhbmdAa2Vy bmVsLm9yZwAKCRA5NzHcH7XmBJCMAP9VkAPycbbqa6qWUASdyh/HGyuLJTHSfmsJ zO4y6hBgOwD9GXg55sY8ycvcOx9ayaUt5V5f9zhs4wdGcoPhj5fWzgA= =nUva -----END PGP SIGNATURE----- Merge tag 'erofs-for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs Pull erofs updates from Gao Xiang: "In this cycle, sub-page block support for uncompressed files is available. It's mainly used to enable original signing ('golden') 4k-block images on arm64 with 16/64k pages. In addition, end users could also use this feature to build a manifest to directly refer to golden tar data. Besides, long xattr name prefix support is also introduced in this cycle to avoid too many xattrs with the same prefix (e.g. overlayfs xattrs). It's useful for erofs + overlayfs combination (like Composefs model): the image size is reduced by ~14% and runtime performance is also slightly improved. Others are random fixes and cleanups as usual. Summary: - Add sub-page block size support for uncompressed files - Support flattened block device for multi-blob images to be attached into virtual machines (including cloud servers) and bare metals - Support long xattr name prefixes to optimize images with common xattr namespaces (e.g. files with overlayfs xattrs) use cases - Various minor cleanups & fixes" * tag 'erofs-for-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs: erofs: cleanup i_format-related stuffs erofs: sunset erofs_dbg() erofs: fix potential overflow calculating xattr_isize erofs: get rid of z_erofs_fill_inode() erofs: enable long extended attribute name prefixes erofs: handle long xattr name prefixes properly erofs: add helpers to load long xattr name prefixes erofs: introduce on-disk format for long xattr name prefixes erofs: move packed inode out of the compression part erofs: keep meta inode into erofs_buf erofs: initialize packed inode after root inode is assigned erofs: stop parsing non-compact HEAD index if clusterofs is invalid erofs: don't warn ztailpacking feature anymore erofs: simplify erofs_xattr_generic_get() erofs: rename init_inode_xattrs with erofs_ prefix erofs: move several xattr helpers into xattr.c erofs: tidy up EROFS on-disk naming erofs: support flattened block device for multi-blob images erofs: set block size to the on-disk block size erofs: avoid hardcoded blocksize for subpage block support
73 lines
2.1 KiB
C
73 lines
2.1 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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#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 char *erofs_xattr_prefix(unsigned int idx,
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struct dentry *dentry)
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{
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const struct xattr_handler *handler = NULL;
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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] = &nop_posix_acl_access,
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[EROFS_XATTR_INDEX_POSIX_ACL_DEFAULT] = &nop_posix_acl_default,
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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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if (idx && idx < ARRAY_SIZE(xattr_handler_map))
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handler = xattr_handler_map[idx];
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if (!xattr_handler_can_list(handler, dentry))
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return NULL;
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return xattr_prefix(handler);
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}
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extern const struct xattr_handler *erofs_xattr_handlers[];
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int erofs_xattr_prefixes_init(struct super_block *sb);
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void erofs_xattr_prefixes_cleanup(struct super_block *sb);
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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_xattr_prefixes_init(struct super_block *sb) { return 0; }
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static inline void erofs_xattr_prefixes_cleanup(struct super_block *sb) {}
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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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