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The LITMUS^RT kernel.

Bjoern Brandenburg

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author	Bjoern B. Brandenburg <bbb@cs.unc.edu>	2010-11-16 11:44:54 -0500
committer	Bjoern B. Brandenburg <bbb@cs.unc.edu>	2010-11-16 11:44:54 -0500
commit	1726017e944d0086f14f867befbf5ebf07adc7dd (patch)
tree	a02ed0f31998ede99372964549e00216f0733e57 /kernel/exit.c
parent	d922f5eb1c375ab0445240110656c1d793eaad04 (diff)

Improve help message for TRACE() buffer

It's not being allocated per cpu anymore. Further, provide a hint to the user where to find the data in userspace.

Diffstat (limited to 'kernel/exit.c')

0 files changed, 0 insertions, 0 deletions

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/*
 *  linux/include/linux/ext3_fs.h
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  from
 *
 *  linux/include/linux/minix_fs.h
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 */

#ifndef _LINUX_EXT3_FS_H
#define _LINUX_EXT3_FS_H

#include <linux/types.h>
#include <linux/magic.h>

/*
 * The second extended filesystem constants/structures
 */

/*
 * Define EXT3FS_DEBUG to produce debug messages
 */
#undef EXT3FS_DEBUG

/*
 * Define EXT3_RESERVATION to reserve data blocks for expanding files
 */
#define EXT3_DEFAULT_RESERVE_BLOCKS     8
/*max window size: 1024(direct blocks) + 3([t,d]indirect blocks) */
#define EXT3_MAX_RESERVE_BLOCKS         1027
#define EXT3_RESERVE_WINDOW_NOT_ALLOCATED 0

/*
 * Debug code
 */
#ifdef EXT3FS_DEBUG
#define ext3_debug(f, a...)						\
	do {								\
		printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:",	\
			__FILE__, __LINE__, __func__);		\
		printk (KERN_DEBUG f, ## a);				\
	} while (0)
#else
#define ext3_debug(f, a...)	do {} while (0)
#endif

/*
 * Special inodes numbers
 */
#define	EXT3_BAD_INO		 1	/* Bad blocks inode */
#define EXT3_ROOT_INO		 2	/* Root inode */
#define EXT3_BOOT_LOADER_INO	 5	/* Boot loader inode */
#define EXT3_UNDEL_DIR_INO	 6	/* Undelete directory inode */
#define EXT3_RESIZE_INO		 7	/* Reserved group descriptors inode */
#define EXT3_JOURNAL_INO	 8	/* Journal inode */

/* First non-reserved inode for old ext3 filesystems */
#define EXT3_GOOD_OLD_FIRST_INO	11

/*
 * Maximal count of links to a file
 */
#define EXT3_LINK_MAX		32000

/*
 * Macro-instructions used to manage several block sizes
 */
#define EXT3_MIN_BLOCK_SIZE		1024
#define	EXT3_MAX_BLOCK_SIZE		65536
#define EXT3_MIN_BLOCK_LOG_SIZE		10
#ifdef __KERNEL__
# define EXT3_BLOCK_SIZE(s)		((s)->s_blocksize)
#else
# define EXT3_BLOCK_SIZE(s)		(EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
#endif
#define	EXT3_ADDR_PER_BLOCK(s)		(EXT3_BLOCK_SIZE(s) / sizeof (__u32))
#ifdef __KERNEL__
# define EXT3_BLOCK_SIZE_BITS(s)	((s)->s_blocksize_bits)
#else
# define EXT3_BLOCK_SIZE_BITS(s)	((s)->s_log_block_size + 10)
#endif
#ifdef __KERNEL__
#define	EXT3_ADDR_PER_BLOCK_BITS(s)	(EXT3_SB(s)->s_addr_per_block_bits)
#define EXT3_INODE_SIZE(s)		(EXT3_SB(s)->s_inode_size)
#define EXT3_FIRST_INO(s)		(EXT3_SB(s)->s_first_ino)
#else
#define EXT3_INODE_SIZE(s)	(((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
				 EXT3_GOOD_OLD_INODE_SIZE : \
				 (s)->s_inode_size)
#define EXT3_FIRST_INO(s)	(((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
				 EXT3_GOOD_OLD_FIRST_INO : \
				 (s)->s_first_ino)
#endif

/*
 * Macro-instructions used to manage fragments
 */
#define EXT3_MIN_FRAG_SIZE		1024
#define	EXT3_MAX_FRAG_SIZE		4096
#define EXT3_MIN_FRAG_LOG_SIZE		  10
#ifdef __KERNEL__
# define EXT3_FRAG_SIZE(s)		(EXT3_SB(s)->s_frag_size)
# define EXT3_FRAGS_PER_BLOCK(s)	(EXT3_SB(s)->s_frags_per_block)
#else
# define EXT3_FRAG_SIZE(s)		(EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
# define EXT3_FRAGS_PER_BLOCK(s)	(EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
#endif

/*
 * Structure of a blocks group descriptor
 */
struct ext3_group_desc
{
	__le32	bg_block_bitmap;		/* Blocks bitmap block */
	__le32	bg_inode_bitmap;		/* Inodes bitmap block */
	__le32	bg_inode_table;		/* Inodes table block */
	__le16	bg_free_blocks_count;	/* Free blocks count */
	__le16	bg_free_inodes_count;	/* Free inodes count */
	__le16	bg_used_dirs_count;	/* Directories count */
	__u16	bg_pad;
	__le32	bg_reserved[3];
};

/*
 * Macro-instructions used to manage group descriptors
 */
#ifdef __KERNEL__
# define EXT3_BLOCKS_PER_GROUP(s)	(EXT3_SB(s)->s_blocks_per_group)
# define EXT3_DESC_PER_BLOCK(s)		(EXT3_SB(s)->s_desc_per_block)
# define EXT3_INODES_PER_GROUP(s)	(EXT3_SB(s)->s_inodes_per_group)
# define EXT3_DESC_PER_BLOCK_BITS(s)	(EXT3_SB(s)->s_desc_per_block_bits)
#else
# define EXT3_BLOCKS_PER_GROUP(s)	((s)->s_blocks_per_group)
# define EXT3_DESC_PER_BLOCK(s)		(EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
# define EXT3_INODES_PER_GROUP(s)	((s)->s_inodes_per_group)
#endif

/*
 * Constants relative to the data blocks
 */
#define	EXT3_NDIR_BLOCKS		12
#define	EXT3_IND_BLOCK			EXT3_NDIR_BLOCKS
#define	EXT3_DIND_BLOCK			(EXT3_IND_BLOCK + 1)
#define	EXT3_TIND_BLOCK			(EXT3_DIND_BLOCK + 1)
#define	EXT3_N_BLOCKS			(EXT3_TIND_BLOCK + 1)

/*
 * Inode flags
 */
#define	EXT3_SECRM_FL			0x00000001 /* Secure deletion */
#define	EXT3_UNRM_FL			0x00000002 /* Undelete */
#define	EXT3_COMPR_FL			0x00000004 /* Compress file */
#define EXT3_SYNC_FL			0x00000008 /* Synchronous updates */
#define EXT3_IMMUTABLE_FL		0x00000010 /* Immutable file */
#define EXT3_APPEND_FL			0x00000020 /* writes to file may only append */
#define EXT3_NODUMP_FL			0x00000040 /* do not dump file */
#define EXT3_NOATIME_FL			0x00000080 /* do not update atime */
/* Reserved for compression usage... */
#define EXT3_DIRTY_FL			0x00000100
#define EXT3_COMPRBLK_FL		0x00000200 /* One or more compressed clusters */
#define EXT3_NOCOMPR_FL			0x00000400 /* Don't compress */
#define EXT3_ECOMPR_FL			0x00000800 /* Compression error */
/* End compression flags --- maybe not all used */
#define EXT3_INDEX_FL			0x00001000 /* hash-indexed directory */
#define EXT3_IMAGIC_FL			0x00002000 /* AFS directory */
#define EXT3_JOURNAL_DATA_FL		0x00004000 /* file data should be journaled */
#define EXT3_NOTAIL_FL			0x00008000 /* file tail should not be merged */
#define EXT3_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
#define EXT3_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
#define EXT3_RESERVED_FL		0x80000000 /* reserved for ext3 lib */

#define EXT3_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
#define EXT3_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */

/* Flags that should be inherited by new inodes from their parent. */
#define EXT3_FL_INHERITED (EXT3_SECRM_FL | EXT3_UNRM_FL | EXT3_COMPR_FL |\
			   EXT3_SYNC_FL | EXT3_IMMUTABLE_FL | EXT3_APPEND_FL |\
			   EXT3_NODUMP_FL | EXT3_NOATIME_FL | EXT3_COMPRBLK_FL|\
			   EXT3_NOCOMPR_FL | EXT3_JOURNAL_DATA_FL |\
			   EXT3_NOTAIL_FL | EXT3_DIRSYNC_FL)

/* Flags that are appropriate for regular files (all but dir-specific ones). */
#define EXT3_REG_FLMASK (~(EXT3_DIRSYNC_FL | EXT3_TOPDIR_FL))

/* Flags that are appropriate for non-directories/regular files. */
#define EXT3_OTHER_FLMASK (EXT3_NODUMP_FL | EXT3_NOATIME_FL)

/* Mask out flags that are inappropriate for the given type of inode. */
static inline __u32 ext3_mask_flags(umode_t mode, __u32 flags)
{
	if (S_ISDIR(mode))
		return flags;
	else if (S_ISREG(mode))
		return flags & EXT3_REG_FLMASK;
	else
		return flags & EXT3_OTHER_FLMASK;
}

/* Used to pass group descriptor data when online resize is done */
struct ext3_new_group_input {
	__u32 group;            /* Group number for this data */
	__u32 block_bitmap;     /* Absolute block number of block bitmap */
	__u32 inode_bitmap;     /* Absolute block number of inode bitmap */
	__u32 inode_table;      /* Absolute block number of inode table start */
	__u32 blocks_count;     /* Total number of blocks in this group */
	__u16 reserved_blocks;  /* Number of reserved blocks in this group */
	__u16 unused;
};

/* The struct ext3_new_group_input in kernel space, with free_blocks_count */
struct ext3_new_group_data {
	__u32 group;
	__u32 block_bitmap;
	__u32 inode_bitmap;
	__u32 inode_table;
	__u32 blocks_count;
	__u16 reserved_blocks;
	__u16 unused;
	__u32 free_blocks_count;
};


/*
 * ioctl commands
 */
#define	EXT3_IOC_GETFLAGS		FS_IOC_GETFLAGS
#define	EXT3_IOC_SETFLAGS		FS_IOC_SETFLAGS
#define	EXT3_IOC_GETVERSION		_IOR('f', 3, long)
#define	EXT3_IOC_SETVERSION		_IOW('f', 4, long)
#define EXT3_IOC_GROUP_EXTEND		_IOW('f', 7, unsigned long)
#define EXT3_IOC_GROUP_ADD		_IOW('f', 8,struct ext3_new_group_input)
#define	EXT3_IOC_GETVERSION_OLD		FS_IOC_GETVERSION
#define	EXT3_IOC_SETVERSION_OLD		FS_IOC_SETVERSION
#ifdef CONFIG_JBD_DEBUG
#define EXT3_IOC_WAIT_FOR_READONLY	_IOR('f', 99, long)
#endif
#define EXT3_IOC_GETRSVSZ		_IOR('f', 5, long)
#define EXT3_IOC_SETRSVSZ		_IOW('f', 6, long)

/*
 * ioctl commands in 32 bit emulation
 */
#define EXT3_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
#define EXT3_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
#define EXT3_IOC32_GETVERSION		_IOR('f', 3, int)
#define EXT3_IOC32_SETVERSION		_IOW('f', 4, int)
#define EXT3_IOC32_GETRSVSZ		_IOR('f', 5, int)
#define EXT3_IOC32_SETRSVSZ		_IOW('f', 6, int)
#define EXT3_IOC32_GROUP_EXTEND		_IOW('f', 7, unsigned int)
#ifdef CONFIG_JBD_DEBUG
#define EXT3_IOC32_WAIT_FOR_READONLY	_IOR('f', 99, int)
#endif
#define EXT3_IOC32_GETVERSION_OLD	FS_IOC32_GETVERSION
#define EXT3_IOC32_SETVERSION_OLD	FS_IOC32_SETVERSION


/*
 *  Mount options
 */
struct ext3_mount_options {
	unsigned long s_mount_opt;
	uid_t s_resuid;
	gid_t s_resgid;
	unsigned long s_commit_interval;
#ifdef CONFIG_QUOTA
	int s_jquota_fmt;
	char *s_qf_names[MAXQUOTAS];
#endif
};

/*
 * Structure of an inode on the disk
 */
struct ext3_inode {
	__le16	i_mode;		/* File mode */
	__le16	i_uid;		/* Low 16 bits of Owner Uid */
	__le32	i_size;		/* Size in bytes */
	__le32	i_atime;	/* Access time */
	__le32	i_ctime;	/* Creation time */
	__le32	i_mtime;	/* Modification time */
	__le32	i_dtime;	/* Deletion Time */
	__le16	i_gid;		/* Low 16 bits of Group Id */
	__le16	i_links_count;	/* Links count */
	__le32	i_blocks;	/* Blocks count */
	__le32	i_flags;	/* File flags */
	union {
		struct {
			__u32  l_i_reserved1;
		} linux1;
		struct {
			__u32  h_i_translator;
		} hurd1;
		struct {
			__u32  m_i_reserved1;
		} masix1;
	} osd1;				/* OS dependent 1 */
	__le32	i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
	__le32	i_generation;	/* File version (for NFS) */
	__le32	i_file_acl;	/* File ACL */
	__le32	i_dir_acl;	/* Directory ACL */
	__le32	i_faddr;	/* Fragment address */
	union {


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