diff options
Diffstat (limited to 'fs/aufs/fstype.h')
| -rw-r--r-- | fs/aufs/fstype.h | 387 |
1 files changed, 0 insertions, 387 deletions
diff --git a/fs/aufs/fstype.h b/fs/aufs/fstype.h deleted file mode 100644 index 725b2ffff..000000000 --- a/fs/aufs/fstype.h +++ /dev/null @@ -1,387 +0,0 @@ -/* - * Copyright (C) 2005-2016 Junjiro R. Okajima - */ - -/* - * judging filesystem type - */ - -#ifndef __AUFS_FSTYPE_H__ -#define __AUFS_FSTYPE_H__ - -#ifdef __KERNEL__ - -#include <linux/fs.h> -#include <linux/magic.h> -#include <linux/nfs_fs.h> -#include <linux/romfs_fs.h> - -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_ISO9660_FS) || defined(CONFIG_ISO9660_FS_MODULE) - return sb->s_magic == ISOFS_SUPER_MAGIC; -#else - return 0; -#endif -} - -static inline int au_test_romfs(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_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_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_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 -} - -static inline int au_test_debugfs(struct super_block *sb __maybe_unused) -{ -#ifdef CONFIG_DEBUG_FS - return sb->s_magic == DEBUGFS_MAGIC; -#else - return 0; -#endif -} - -static inline int au_test_nilfs(struct super_block *sb __maybe_unused) -{ -#if defined(CONFIG_NILFS) || defined(CONFIG_NILFS_MODULE) - return sb->s_magic == NILFS_SUPER_MAGIC; -#else - return 0; -#endif -} - -static inline int au_test_hfsplus(struct super_block *sb __maybe_unused) -{ -#if defined(CONFIG_HFSPLUS_FS) || defined(CONFIG_HFSPLUS_FS_MODULE) - return sb->s_magic == HFSPLUS_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 -#ifndef CONFIG_AUFS_BR_RAMFS - au_test_ramfs(sb) || -#endif - au_test_procfs(sb) - || au_test_sysfs(sb) - || au_test_configfs(sb) - || au_test_debugfs(sb) - || au_test_securityfs(sb) - || au_test_xenfs(sb) - || au_test_ecryptfs(sb) - /* || !strcmp(au_sbtype(sb), "unionfs") */ - || au_test_aufs(sb); /* will be supported in next version */ -} - -static inline int au_test_fs_remote(struct super_block *sb) -{ - return !au_test_tmpfs(sb) -#ifdef CONFIG_AUFS_BR_RAMFS - && !au_test_ramfs(sb) -#endif - && !(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_btrfs(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_btrfs(sb) - || au_test_ubifs(sb) - || au_test_hfsplus(sb) /* maintained, but incorrect */ - /* || 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_fat(sb) - || au_test_msdos(sb) - || au_test_vfat(sb); -} - -/* they don't check i_nlink in link(2) */ -static inline int au_test_fs_no_limit_nlink(struct super_block *sb) -{ - return au_test_tmpfs(sb) -#ifdef CONFIG_AUFS_BR_RAMFS - || au_test_ramfs(sb) -#endif - || au_test_ubifs(sb) - || au_test_hfsplus(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_ubifs(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) - /* don't want unnecessary work for xino */ - || au_test_aufs(sb) - || au_test_ecryptfs(sb) - || au_test_nilfs(sb); -} - -static inline int au_test_fs_trunc_xino(struct super_block *sb) -{ - return au_test_tmpfs(sb) - || au_test_ramfs(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); -} - -/* - * test if the @inode is nfs with 'noacl' option - * NFS always sets MS_POSIXACL regardless its mount option 'noacl.' - */ -static inline int au_test_nfs_noacl(struct inode *inode) -{ - return au_test_nfs(inode->i_sb) - /* && IS_POSIXACL(inode) */ - && !nfs_server_capable(inode, NFS_CAP_ACLS); -} - -#endif /* __KERNEL__ */ -#endif /* __AUFS_FSTYPE_H__ */ |