Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753672AbZCPHYf (ORCPT ); Mon, 16 Mar 2009 03:24:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756604AbZCPHWy (ORCPT ); Mon, 16 Mar 2009 03:22:54 -0400 Received: from vsmtp01.dti.ne.jp ([202.216.231.136]:35631 "EHLO vsmtp01.dti.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754014AbZCPHWu (ORCPT ); Mon, 16 Mar 2009 03:22:50 -0400 From: "J. R. Okajima" To: linux-kernel@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, "J. R. Okajima" Subject: [RFC Aufs2 #2 24/28] aufs test for fstype Date: Mon, 16 Mar 2009 16:20:36 +0900 Message-Id: <1237188040-11404-25-git-send-email-hooanon05@yahoo.co.jp> X-Mailer: git-send-email 1.6.1.284.g5dc13 In-Reply-To: <1237188040-11404-1-git-send-email-hooanon05@yahoo.co.jp> References: <1237188040-11404-1-git-send-email-hooanon05@yahoo.co.jp> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 12699 Lines: 517 initial commit judge the type of filesystem of branch Signed-off-by: J. R. Okajima --- fs/aufs/fstype.h | 434 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/aufs/magic.mk | 52 +++++++ 2 files changed, 486 insertions(+), 0 deletions(-) create mode 100644 fs/aufs/fstype.h create mode 100644 fs/aufs/magic.mk diff --git a/fs/aufs/fstype.h b/fs/aufs/fstype.h new file mode 100644 index 0000000..eac06aa --- /dev/null +++ b/fs/aufs/fstype.h @@ -0,0 +1,434 @@ +/* + * Copyright (C) 2005-2009 Junjiro R. Okajima + * + * This program, aufs 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; either version 2 of the License, or + * (at your option) any later version. + */ + +/* + * judging filesystem type + */ + +#ifndef __AUFS_FSTYPE_H__ +#define __AUFS_FSTYPE_H__ + +#ifdef __KERNEL__ + +#include +#include +#include +#include +#include + +static inline int au_test_aufs(struct super_block *sb) +{ + return sb->s_magic == AUFS_SUPER_MAGIC; +} + +static inline const char *au_sbtype(struct super_block *sb) +{ + return sb->s_type->name; +} + +static inline int au_test_iso9660(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_ROMFS_FS) || defined(CONFIG_ROMFS_FS_MODULE) + return sb->s_magic == ROMFS_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_romfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_ISO9660_FS) || defined(CONFIG_ISO9660_FS_MODULE) + return sb->s_magic == ISOFS_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_cramfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_CRAMFS) || defined(CONFIG_CRAMFS_MODULE) + return sb->s_magic == CRAMFS_MAGIC; +#endif + return 0; +} + +static inline int au_test_nfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_NFS_FS) || defined(CONFIG_NFS_FS_MODULE) + return sb->s_magic == NFS_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_fuse(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_FUSE_FS) || defined(CONFIG_FUSE_FS_MODULE) + return sb->s_magic == FUSE_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_xfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_XFS_FS) || defined(CONFIG_XFS_FS_MODULE) + return sb->s_magic == XFS_SB_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_tmpfs(struct super_block *sb __maybe_unused) +{ +#ifdef CONFIG_TMPFS + return sb->s_magic == TMPFS_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_ecryptfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_ECRYPT_FS) || defined(CONFIG_ECRYPT_FS_MODULE) + return !strcmp(au_sbtype(sb), "ecryptfs"); +#else + return 0; +#endif +} + +static inline int au_test_smbfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_SMB_FS) || defined(CONFIG_SMB_FS_MODULE) + return sb->s_magic == SMB_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_ocfs2(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_OCFS2_FS) || defined(CONFIG_OCFS2_FS_MODULE) + return sb->s_magic == OCFS2_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_ocfs2_dlmfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_OCFS2_FS_O2CB) || defined(CONFIG_OCFS2_FS_O2CB_MODULE) + return sb->s_magic == DLMFS_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_coda(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_CODA_FS) || defined(CONFIG_CODA_FS_MODULE) + return sb->s_magic == CODA_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_v9fs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_9P_FS) || defined(CONFIG_9P_FS_MODULE) + return sb->s_magic == V9FS_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_ext4(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_EXT4DEV_FS) || defined(CONFIG_EXT4DEV_FS_MODULE) + return sb->s_magic == EXT4_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_sysv(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_SYSV_FS) || defined(CONFIG_SYSV_FS_MODULE) + return !strcmp(au_sbtype(sb), "sysv"); +#else + return 0; +#endif +} + +static inline int au_test_ramfs(struct super_block *sb) +{ + return sb->s_magic == RAMFS_MAGIC; +} + +static inline int au_test_ubifs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_UBIFS_FS) || defined(CONFIG_UBIFS_FS_MODULE) + return sb->s_magic == UBIFS_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_procfs(struct super_block *sb __maybe_unused) +{ +#ifdef CONFIG_PROC_FS + return sb->s_magic == PROC_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_sysfs(struct super_block *sb __maybe_unused) +{ +#ifdef CONFIG_SYSFS + return sb->s_magic == SYSFS_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_configfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_CONFIGFS_FS) || defined(CONFIG_CONFIGFS_FS_MODULE) + return sb->s_magic == CONFIGFS_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_minix(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_MINIX_FS) || defined(CONFIG_MINIX_FS_MODULE) + return sb->s_magic == MINIX3_SUPER_MAGIC + || sb->s_magic == MINIX2_SUPER_MAGIC + || sb->s_magic == MINIX2_SUPER_MAGIC2 + || sb->s_magic == MINIX_SUPER_MAGIC + || sb->s_magic == MINIX_SUPER_MAGIC2; +#else + return 0; +#endif +} + +static inline int au_test_cifs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_CIFS_FS) || defined(CONFIGCIFS_FS_MODULE) + return sb->s_magic == CIFS_MAGIC_NUMBER; +#else + return 0; +#endif +} + +static inline int au_test_fat(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_FAT_FS) || defined(CONFIG_FAT_FS_MODULE) + return sb->s_magic == MSDOS_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_msdos(struct super_block *sb) +{ + return au_test_fat(sb); +} + +static inline int au_test_vfat(struct super_block *sb) +{ + return au_test_fat(sb); +} + +static inline int au_test_securityfs(struct super_block *sb __maybe_unused) +{ +#ifdef CONFIG_SECURITYFS + return sb->s_magic == SECURITYFS_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_squashfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_SQUASHFS) || defined(CONFIG_SQUASHFS_MODULE) + return sb->s_magic == SQUASHFS_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_btrfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_BTRFS_FS) || defined(CONFIG_BTRFS_FS_MODULE) + return sb->s_magic == BTRFS_SUPER_MAGIC; +#else + return 0; +#endif +} + +static inline int au_test_xenfs(struct super_block *sb __maybe_unused) +{ +#if defined(CONFIG_XENFS) || defined(CONFIG_XENFS_MODULE) + return sb->s_magic == XENFS_SUPER_MAGIC; +#else + return 0; +#endif +} + +/* ---------------------------------------------------------------------- */ +/* + * they can't be an aufs branch. + */ +static inline int au_test_fs_unsuppoted(struct super_block *sb) +{ + return au_test_procfs(sb) + || au_test_sysfs(sb) + || au_test_configfs(sb) + || au_test_securityfs(sb) + || au_test_xenfs(sb) + || au_test_ramfs(sb) + /* || !strcmp(au_sbtype(sb), "unionfs") */ + || au_test_aufs(sb); /* will be supported in next version */ +} + +/* + * If the filesystem supports NFS-export, then it has to support NULL as + * a nameidata parameter for ->create(), ->lookup() and ->d_revalidate(). + * We can apply this principle when we handle a lower filesystem. + */ +static inline int au_test_fs_null_nd(struct super_block *sb) +{ + return !!sb->s_export_op; +} + +static inline int au_test_fs_remote(struct super_block *sb) +{ + return !au_test_tmpfs(sb) + && !(sb->s_type->fs_flags & FS_REQUIRES_DEV); +} + +/* ---------------------------------------------------------------------- */ + +/* + * Note: these functions (below) are created after reading ->getattr() in all + * filesystems under linux/fs. it means we have to do so in every update... + */ + +/* + * some filesystems require getattr to refresh the inode attributes before + * referencing. + * in most cases, we can rely on the inode attribute in NFS (or every remote fs) + * and leave the work for d_revalidate() + */ +static inline int au_test_fs_refresh_iattr(struct super_block *sb) +{ + return au_test_nfs(sb) + || au_test_fuse(sb) + /* || au_test_smbfs(sb) */ /* untested */ + /* || au_test_ocfs2(sb) */ /* untested */ + /* || au_test_btrfs(sb) */ /* untested */ + /* || au_test_coda(sb) */ /* untested */ + /* || au_test_v9fs(sb) */ /* untested */ + ; +} + +/* + * filesystems which don't maintain i_size or i_blocks. + */ +static inline int au_test_fs_bad_iattr_size(struct super_block *sb) +{ + return au_test_xfs(sb) + /* || au_test_ext4(sb) */ /* untested */ + /* || au_test_ocfs2(sb) */ /* untested */ + /* || au_test_ocfs2_dlmfs(sb) */ /* untested */ + /* || au_test_sysv(sb) */ /* untested */ + /* || au_test_ramfs(sb)*/ /* unsupported */ + /* || au_test_ubifs(sb) */ /* untested */ + /* || au_test_minix(sb) */ /* untested */ + ; +} + +/* + * filesystems which don't store the correct value in some of their inode + * attributes. + */ +static inline int au_test_fs_bad_iattr(struct super_block *sb) +{ + return au_test_fs_bad_iattr_size(sb) + /* || au_test_cifs(sb) */ /* untested */ + || au_test_fat(sb) + || au_test_msdos(sb) + || au_test_vfat(sb); +} + +/* + * filesystems which sets S_NOATIME and S_NOCMTIME. + */ +static inline int au_test_fs_notime(struct super_block *sb) +{ + return au_test_nfs(sb) + || au_test_fuse(sb) + /* || au_test_cifs(sb) */ /* untested */ + /* || au_test_ubifs(sb) */ /* untested */ + ; +} + +/* + * filesystems which requires replacing i_mapping. + */ +static inline int au_test_fs_bad_mapping(struct super_block *sb) +{ + return au_test_fuse(sb); +} + +/* temporary support for i#1 in cramfs */ +static inline int au_test_fs_unique_ino(struct inode *inode) +{ + if (au_test_cramfs(inode->i_sb)) + return inode->i_ino != 1; + return 1; +} + +/* ---------------------------------------------------------------------- */ + +/* + * the filesystem where the xino files placed must support i/o after unlink and + * maintain i_size and i_blocks. + */ +static inline int au_test_fs_bad_xino(struct super_block *sb) +{ + return au_test_fs_remote(sb) + || au_test_fs_bad_iattr_size(sb) + || !au_test_fs_null_nd(sb) /* to keep xino code simple */ + /* don't want unnecessary work for xino */ + || au_test_aufs(sb) + || au_test_ecryptfs(sb); +} + +static inline int au_test_fs_trunc_xino(struct super_block *sb) +{ + return au_test_tmpfs(sb); +} + +/* + * test if the @sb is real-readonly. + */ +static inline int au_test_fs_rr(struct super_block *sb) +{ + return au_test_squashfs(sb) + || au_test_iso9660(sb) + || au_test_cramfs(sb) + || au_test_romfs(sb); +} + +#endif /* __KERNEL__ */ +#endif /* __AUFS_FSTYPE_H__ */ diff --git a/fs/aufs/magic.mk b/fs/aufs/magic.mk new file mode 100644 index 0000000..83d613c --- /dev/null +++ b/fs/aufs/magic.mk @@ -0,0 +1,52 @@ + +# defined in ${srctree}/fs/fuse/inode.c +# tristate +ifdef CONFIG_FUSE_FS +ccflags-y += -DFUSE_SUPER_MAGIC=0x65735546 +endif + +# defined in ${srctree}/fs/ocfs2/ocfs2_fs.h +# tristate +ifdef CONFIG_OCFS2_FS +ccflags-y += -DOCFS2_SUPER_MAGIC=0x7461636f +endif + +# defined in ${srctree}/fs/ocfs2/dlm/userdlm.h +# tristate +ifdef CONFIG_OCFS2_FS_O2CB +ccflags-y += -DDLMFS_MAGIC=0x76a9f425 +endif + +# defined in ${srctree}/fs/ramfs/inode.c +# always true +ccflags-y += -DRAMFS_MAGIC=0x858458f6 + +# defined in ${srctree}/fs/cifs/cifsfs.c +# tristate +ifdef CONFIG_CIFS_FS +ccflags-y += -DCIFS_MAGIC_NUMBER=0xFF534D42 +endif + +# defined in ${srctree}/fs/xfs/xfs_sb.h +# tristate +ifdef CONFIG_XFS_FS +ccflags-y += -DXFS_SB_MAGIC=0x58465342 +endif + +# defined in ${srctree}/fs/configfs/mount.c +# tristate +ifdef CONFIG_CONFIGFS_FS +ccflags-y += -DCONFIGFS_MAGIC=0x62656570 +endif + +# defined in ${srctree}/fs/9p/v9fs.h +# tristate +ifdef CONFIG_9P_FS +ccflags-y += -DV9FS_MAGIC=0x01021997 +endif + +# defined in ${srctree}/fs/ubifs/ubifs.h +# tristate +ifdef CONFIG_UBIFS_FS +ccflags-y += -DUBIFS_SUPER_MAGIC=0x24051905 +endif -- 1.6.1.284.g5dc13 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/