imported original firmware WRT54GL_v4.30.11_11_US

1 files changed, 402 insertions, 0 deletions

diff --git a/release/src/linux/linux/include/linux/sysv_fs.h b/release/src/linux/linux/include/linux/sysv_fs.h
new file mode 100644
index 00000000..104de0a0
--- /dev/null
+++ b/release/src/linux/linux/include/linux/sysv_fs.h
@@ -0,0 +1,402 @@
+#ifndef _LINUX_SYSV_FS_H
+#define _LINUX_SYSV_FS_H
+
+/*
+ * The SystemV/Coherent filesystem constants/structures/macros
+ */
+
+
+/* This code assumes
+   - sizeof(short) = 2, sizeof(int) = 4, sizeof(long) = 4,
+   - alignof(short) = 2, alignof(long) = 4.
+*/
+
+#ifdef __GNUC__
+#define __packed2__  __attribute__ ((packed, aligned(2)))
+#else
+#error I want gcc!
+#endif
+
+#include <linux/stat.h>		/* declares S_IFLNK etc. */
+#include <linux/sched.h>	/* declares wake_up() */
+#include <linux/sysv_fs_sb.h>	/* defines the sv_... shortcuts */
+
+
+/* Layout on disk */
+/* ============== */
+
+static inline u32 PDP_swab(u32 x)
+{
+#ifdef __LITTLE_ENDIAN
+	return ((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16);
+#else
+#ifdef __BIG_ENDIAN
+	return ((x & 0xff00ff) << 8) | ((x & 0xff00ff00) >> 8);
+#else
+#error BYTESEX
+#endif
+#endif
+}
+
+/* inode numbers are 16 bit */
+
+typedef u16 sysv_ino_t;
+
+/* Block numbers are 24 bit, sometimes stored in 32 bit.
+   On Coherent FS, they are always stored in PDP-11 manner: the least
+   significant 16 bits come last.
+*/
+
+typedef u32 sysv_zone_t;
+
+/* Among the blocks ... */
+/* Xenix FS, Coherent FS: block 0 is the boot block, block 1 the super-block.
+   SystemV FS: block 0 contains both the boot sector and the super-block. */
+/* The first inode zone is sb->sv_firstinodezone (1 or 2). */
+
+/* Among the inodes ... */
+/* 0 is non-existent */
+#define SYSV_BADBL_INO	1	/* inode of bad blocks file */
+#define SYSV_ROOT_INO	2	/* inode of root directory */
+
+
+/* Xenix super-block data on disk */
+#define XENIX_NICINOD	100	/* number of inode cache entries */
+#define XENIX_NICFREE	100	/* number of free block list chunk entries */
+struct xenix_super_block {
+	u16		s_isize; /* index of first data zone */
+	u32		s_fsize __packed2__; /* total number of zones of this fs */
+	/* the start of the free block list: */
+	u16		s_nfree;	/* number of free blocks in s_free, <= XENIX_NICFREE */
+	u32		s_free[XENIX_NICFREE]; /* first free block list chunk */
+	/* the cache of free inodes: */
+	u16		s_ninode; /* number of free inodes in s_inode, <= XENIX_NICINOD */
+	sysv_ino_t	s_inode[XENIX_NICINOD]; /* some free inodes */
+	/* locks, not used by Linux: */
+	char		s_flock;	/* lock during free block list manipulation */
+	char		s_ilock;	/* lock during inode cache manipulation */
+	char		s_fmod;		/* super-block modified flag */
+	char		s_ronly;	/* flag whether fs is mounted read-only */
+	u32		s_time __packed2__; /* time of last super block update */
+	u32		s_tfree __packed2__; /* total number of free zones */
+	u16		s_tinode;	/* total number of free inodes */
+	s16		s_dinfo[4];	/* device information ?? */
+	char		s_fname[6];	/* file system volume name */
+	char		s_fpack[6];	/* file system pack name */
+	char		s_clean;	/* set to 0x46 when filesystem is properly unmounted */
+	char		s_fill[371];
+	s32		s_magic;	/* version of file system */
+	s32		s_type;		/* type of file system: 1 for 512 byte blocks
+								2 for 1024 byte blocks
+								3 for 2048 byte blocks */
+								
+};
+
+/* SystemV FS comes in two variants:
+ * sysv2: System V Release 2 (e.g. Microport), structure elements aligned(2).
+ * sysv4: System V Release 4 (e.g. Consensys), structure elements aligned(4).
+ */
+#define SYSV_NICINOD	100	/* number of inode cache entries */
+#define SYSV_NICFREE	50	/* number of free block list chunk entries */
+
+/* SystemV4 super-block data on disk */
+struct sysv4_super_block {
+	u16	s_isize;	/* index of first data zone */
+	u16	s_pad0;
+	u32	s_fsize;	/* total number of zones of this fs */
+	/* the start of the free block list: */
+	u16	s_nfree;	/* number of free blocks in s_free, <= SYSV_NICFREE */
+	u16	s_pad1;
+	u32	s_free[SYSV_NICFREE]; /* first free block list chunk */
+	/* the cache of free inodes: */
+	u16	s_ninode;	/* number of free inodes in s_inode, <= SYSV_NICINOD */
+	u16	s_pad2;
+	sysv_ino_t     s_inode[SYSV_NICINOD]; /* some free inodes */
+	/* locks, not used by Linux: */
+	char	s_flock;	/* lock during free block list manipulation */
+	char	s_ilock;	/* lock during inode cache manipulation */
+	char	s_fmod;		/* super-block modified flag */
+	char	s_ronly;	/* flag whether fs is mounted read-only */
+	u32	s_time;		/* time of last super block update */
+	s16	s_dinfo[4];	/* device information ?? */
+	u32	s_tfree;	/* total number of free zones */
+	u16	s_tinode;	/* total number of free inodes */
+	u16	s_pad3;
+	char	s_fname[6];	/* file system volume name */
+	char	s_fpack[6];	/* file system pack name */
+	s32	s_fill[12];
+	s32	s_state;	/* file system state: 0x7c269d38-s_time means clean */
+	s32	s_magic;	/* version of file system */
+	s32	s_type;		/* type of file system: 1 for 512 byte blocks
+								2 for 1024 byte blocks */
+};
+
+/* SystemV2 super-block data on disk */
+struct sysv2_super_block {
+	u16	s_isize; 		/* index of first data zone */
+	u32	s_fsize __packed2__;	/* total number of zones of this fs */
+	/* the start of the free block list: */
+	u16	s_nfree;		/* number of free blocks in s_free, <= SYSV_NICFREE */
+	u32	s_free[SYSV_NICFREE];	/* first free block list chunk */
+	/* the cache of free inodes: */
+	u16	s_ninode;		/* number of free inodes in s_inode, <= SYSV_NICINOD */
+	sysv_ino_t     s_inode[SYSV_NICINOD]; /* some free inodes */
+	/* locks, not used by Linux: */
+	char	s_flock;		/* lock during free block list manipulation */
+	char	s_ilock;		/* lock during inode cache manipulation */
+	char	s_fmod;			/* super-block modified flag */
+	char	s_ronly;		/* flag whether fs is mounted read-only */
+	u32	s_time __packed2__;	/* time of last super block update */
+	s16	s_dinfo[4];		/* device information ?? */
+	u32	s_tfree __packed2__;	/* total number of free zones */
+	u16	s_tinode;		/* total number of free inodes */
+	char	s_fname[6];		/* file system volume name */
+	char	s_fpack[6];		/* file system pack name */
+	s32	s_fill[14];
+	s32	s_state;		/* file system state: 0xcb096f43 means clean */
+	s32	s_magic;		/* version of file system */
+	s32	s_type;			/* type of file system: 1 for 512 byte blocks
+								2 for 1024 byte blocks */
+};
+
+/* V7 super-block data on disk */
+#define V7_NICINOD     100     /* number of inode cache entries */
+#define V7_NICFREE     50      /* number of free block list chunk entries */
+struct v7_super_block {
+	u16    s_isize;        /* index of first data zone */
+	u32    s_fsize __packed2__; /* total number of zones of this fs */
+	/* the start of the free block list: */
+	u16    s_nfree;        /* number of free blocks in s_free, <= V7_NICFREE */
+	u32    s_free[V7_NICFREE]; /* first free block list chunk */
+	/* the cache of free inodes: */
+	u16    s_ninode;       /* number of free inodes in s_inode, <= V7_NICINOD */
+	sysv_ino_t      s_inode[V7_NICINOD]; /* some free inodes */
+	/* locks, not used by Linux or V7: */
+	char    s_flock;        /* lock during free block list manipulation */
+	char    s_ilock;        /* lock during inode cache manipulation */
+	char    s_fmod;         /* super-block modified flag */
+	char    s_ronly;        /* flag whether fs is mounted read-only */
+	u32     s_time __packed2__; /* time of last super block update */
+	/* the following fields are not maintained by V7: */
+	u32     s_tfree __packed2__; /* total number of free zones */
+	u16     s_tinode;       /* total number of free inodes */
+	u16     s_m;            /* interleave factor */
+	u16     s_n;            /* interleave factor */
+	char    s_fname[6];     /* file system name */
+	char    s_fpack[6];     /* file system pack name */
+};
+
+/* Coherent super-block data on disk */
+#define COH_NICINOD	100	/* number of inode cache entries */
+#define COH_NICFREE	64	/* number of free block list chunk entries */
+struct coh_super_block {
+	u16		s_isize;	/* index of first data zone */
+	u32		s_fsize __packed2__; /* total number of zones of this fs */
+	/* the start of the free block list: */
+	u16 s_nfree;	/* number of free blocks in s_free, <= COH_NICFREE */
+	u32		s_free[COH_NICFREE] __packed2__; /* first free block list chunk */
+	/* the cache of free inodes: */
+	u16		s_ninode;	/* number of free inodes in s_inode, <= COH_NICINOD */
+	sysv_ino_t	s_inode[COH_NICINOD]; /* some free inodes */
+	/* locks, not used by Linux: */
+	char		s_flock;	/* lock during free block list manipulation */
+	char		s_ilock;	/* lock during inode cache manipulation */
+	char		s_fmod;		/* super-block modified flag */
+	char		s_ronly;	/* flag whether fs is mounted read-only */
+	u32		s_time __packed2__; /* time of last super block update */
+	u32		s_tfree __packed2__; /* total number of free zones */
+	u16		s_tinode;	/* total number of free inodes */
+	u16		s_interleave_m;	/* interleave factor */
+	u16		s_interleave_n;
+	char		s_fname[6];	/* file system volume name */
+	char		s_fpack[6];	/* file system pack name */
+	u32		s_unique;	/* zero, not used */
+};
+
+/* SystemV/Coherent inode data on disk */
+
+struct sysv_inode {
+	u16 i_mode;
+	u16 i_nlink;
+	u16 i_uid;
+	u16 i_gid;
+	u32 i_size;
+	union { /* directories, regular files, ... */
+		unsigned char i_addb[3*(10+1+1+1)+1]; /* zone numbers: max. 10 data blocks,
+					      * then 1 indirection block,
+					      * then 1 double indirection block,
+					      * then 1 triple indirection block.
+					      * Then maybe a "file generation number" ??
+					      */
+		/* named pipes on Coherent */
+		struct {
+			char p_addp[30];
+			s16 p_pnc;
+			s16 p_prx;
+			s16 p_pwx;
+		} i_p;
+	} i_a;
+	u32 i_atime;	/* time of last access */
+	u32 i_mtime;	/* time of last modification */
+	u32 i_ctime;	/* time of creation */
+};
+
+/* Admissible values for i_nlink: 0.._LINK_MAX */
+enum {
+	XENIX_LINK_MAX	=	126,	/* ?? */
+	SYSV_LINK_MAX	=	126,	/* 127? 251? */
+	V7_LINK_MAX     =	126,	/* ?? */
+	COH_LINK_MAX	=	10000,
+};
+
+/* The number of inodes per block is
+   sb->sv_inodes_per_block = block_size / sizeof(struct sysv_inode) */
+/* The number of indirect pointers per block is
+   sb->sv_ind_per_block = block_size / sizeof(u32) */
+
+
+/* SystemV/Coherent directory entry on disk */
+
+#define SYSV_NAMELEN	14	/* max size of name in struct sysv_dir_entry */
+
+struct sysv_dir_entry {
+	sysv_ino_t inode;
+	char name[SYSV_NAMELEN]; /* up to 14 characters, the rest are zeroes */
+};
+
+#define SYSV_DIRSIZE	sizeof(struct sysv_dir_entry)	/* size of every directory entry */
+
+
+/* Operations */
+/* ========== */
+
+/* identify the FS in memory */
+enum {
+	FSTYPE_NONE = 0,
+	FSTYPE_XENIX,
+	FSTYPE_SYSV4,
+	FSTYPE_SYSV2,
+	FSTYPE_COH,
+	FSTYPE_V7,
+	FSTYPE_AFS,
+	FSTYPE_END,
+};
+
+#define SYSV_MAGIC_BASE		0x012FF7B3
+
+#define XENIX_SUPER_MAGIC	(SYSV_MAGIC_BASE+FSTYPE_XENIX)
+#define SYSV4_SUPER_MAGIC	(SYSV_MAGIC_BASE+FSTYPE_SYSV4)
+#define SYSV2_SUPER_MAGIC	(SYSV_MAGIC_BASE+FSTYPE_SYSV2)
+#define COH_SUPER_MAGIC		(SYSV_MAGIC_BASE+FSTYPE_COH)
+
+#ifdef __KERNEL__
+
+enum {
+	BYTESEX_LE,
+	BYTESEX_PDP,
+	BYTESEX_BE,
+};
+
+/*
+ * Function prototypes
+ */
+
+extern struct inode * sysv_new_inode(const struct inode *, mode_t);
+extern void sysv_free_inode(struct inode *);
+extern unsigned long sysv_count_free_inodes(struct super_block *);
+extern u32 sysv_new_block(struct super_block *);
+extern void sysv_free_block(struct super_block *, u32);
+extern unsigned long sysv_count_free_blocks(struct super_block *);
+
+extern void sysv_truncate(struct inode *);
+
+extern void sysv_write_inode(struct inode *, int);
+extern int sysv_sync_inode(struct inode *);
+extern int sysv_sync_file(struct file *, struct dentry *, int);
+extern void sysv_set_inode(struct inode *, dev_t);
+
+extern struct sysv_dir_entry *sysv_find_entry(struct dentry*, struct page**);
+extern int sysv_add_link(struct dentry*, struct inode*);
+extern int sysv_delete_entry(struct sysv_dir_entry*, struct page*);
+extern int sysv_make_empty(struct inode*, struct inode*);
+extern int sysv_empty_dir(struct inode*);
+extern void sysv_set_link(struct sysv_dir_entry*, struct page*, struct inode*);
+extern struct sysv_dir_entry *sysv_dotdot(struct inode*, struct page**);
+extern ino_t sysv_inode_by_name(struct dentry*);
+
+extern struct inode_operations sysv_file_inode_operations;
+extern struct inode_operations sysv_dir_inode_operations;
+extern struct inode_operations sysv_fast_symlink_inode_operations;
+extern struct file_operations sysv_file_operations;
+extern struct file_operations sysv_dir_operations;
+extern struct address_space_operations sysv_aops;
+extern struct super_operations sysv_sops;
+extern struct dentry_operations sysv_dentry_operations;
+
+extern struct sysv_inode *sysv_raw_inode(struct super_block *, unsigned, struct buffer_head **);
+
+static inline void dirty_sb(struct super_block *sb)
+{
+	mark_buffer_dirty(sb->sv_bh1);
+	if (sb->sv_bh1 != sb->sv_bh2)
+		mark_buffer_dirty(sb->sv_bh2);
+	sb->s_dirt = 1;
+}
+
+static inline u32 fs32_to_cpu(struct super_block *sb, u32 n)
+{
+	if (sb->sv_bytesex == BYTESEX_PDP)
+		return PDP_swab(n);
+	else if (sb->sv_bytesex == BYTESEX_LE)
+		return le32_to_cpu(n);
+	else
+		return be32_to_cpu(n);
+}
+
+static inline u32 cpu_to_fs32(struct super_block *sb, u32 n)
+{
+	if (sb->sv_bytesex == BYTESEX_PDP)
+		return PDP_swab(n);
+	else if (sb->sv_bytesex == BYTESEX_LE)
+		return cpu_to_le32(n);
+	else
+		return cpu_to_be32(n);
+}
+
+static inline u32 fs32_add(struct super_block *sb, u32 *n, int d)
+{
+	if (sb->sv_bytesex == BYTESEX_PDP)
+		return *n = PDP_swab(PDP_swab(*n)+d);
+	else if (sb->sv_bytesex == BYTESEX_LE)
+		return *n = cpu_to_le32(le32_to_cpu(*n)+d);
+	else
+		return *n = cpu_to_be32(be32_to_cpu(*n)+d);
+}
+
+static inline u16 fs16_to_cpu(struct super_block *sb, u16 n)
+{
+	if (sb->sv_bytesex != BYTESEX_BE)
+		return le16_to_cpu(n);
+	else
+		return be16_to_cpu(n);
+}
+
+static inline u16 cpu_to_fs16(struct super_block *sb, u16 n)
+{
+	if (sb->sv_bytesex != BYTESEX_BE)
+		return cpu_to_le16(n);
+	else
+		return cpu_to_be16(n);
+}
+
+static inline u16 fs16_add(struct super_block *sb, u16 *n, int d)
+{
+	if (sb->sv_bytesex != BYTESEX_BE)
+		return *n = cpu_to_le16(le16_to_cpu(*n)+d);
+	else
+		return *n = cpu_to_be16(be16_to_cpu(*n)+d);
+}
+
+#endif /* __KERNEL__ */
+
+#endif