--- /dev/null
+#ifndef FS_MINIX_H
+#define FS_MINIX_H
+
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/minix_fs.h>
+
+#define INODE_VERSION(inode) minix_sb(inode->i_sb)->s_version
+#define MINIX_V1 0x0001 /* original minix fs */
+#define MINIX_V2 0x0002 /* minix V2 fs */
+#define MINIX_V3 0x0003 /* minix V3 fs */
+
+/*
+ * minix fs inode data in memory
+ */
+struct minix_inode_info {
+ union {
+ __u16 i1_data[16];
+ __u32 i2_data[16];
+ } u;
+ struct inode vfs_inode;
+};
+
+/*
+ * minix super-block data in memory
+ */
+struct minix_sb_info {
+ unsigned long s_ninodes;
+ unsigned long s_nzones;
+ unsigned long s_imap_blocks;
+ unsigned long s_zmap_blocks;
+ unsigned long s_firstdatazone;
+ unsigned long s_log_zone_size;
+ unsigned long s_max_size;
+ int s_dirsize;
+ int s_namelen;
+ struct buffer_head ** s_imap;
+ struct buffer_head ** s_zmap;
+ struct buffer_head * s_sbh;
+ struct minix_super_block * s_ms;
+ unsigned short s_mount_state;
+ unsigned short s_version;
+};
+
+extern struct inode *minix_iget(struct super_block *, unsigned long);
+extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
+extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
+extern struct inode * minix_new_inode(const struct inode *, umode_t, int *);
+extern void minix_free_inode(struct inode * inode);
+extern unsigned long minix_count_free_inodes(struct super_block *sb);
+extern int minix_new_block(struct inode * inode);
+extern void minix_free_block(struct inode *inode, unsigned long block);
+extern unsigned long minix_count_free_blocks(struct super_block *sb);
+extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
+extern int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len);
+
+extern void V1_minix_truncate(struct inode *);
+extern void V2_minix_truncate(struct inode *);
+extern void minix_truncate(struct inode *);
+extern void minix_set_inode(struct inode *, dev_t);
+extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
+extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
+extern unsigned V1_minix_blocks(loff_t, struct super_block *);
+extern unsigned V2_minix_blocks(loff_t, struct super_block *);
+
+extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
+extern int minix_add_link(struct dentry*, struct inode*);
+extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
+extern int minix_make_empty(struct inode*, struct inode*);
+extern int minix_empty_dir(struct inode*);
+extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
+extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
+extern ino_t minix_inode_by_name(struct dentry*);
+
+extern const struct inode_operations minix_file_inode_operations;
+extern const struct inode_operations minix_dir_inode_operations;
+extern const struct file_operations minix_file_operations;
+extern const struct file_operations minix_dir_operations;
+
+static inline struct minix_sb_info *minix_sb(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
+static inline struct minix_inode_info *minix_i(struct inode *inode)
+{
+ return list_entry(inode, struct minix_inode_info, vfs_inode);
+}
+
+static inline unsigned minix_blocks_needed(unsigned bits, unsigned blocksize)
+{
+ return DIV_ROUND_UP(bits, blocksize * 8);
+}
+
+#if defined(CONFIG_MINIX_FS_NATIVE_ENDIAN) && \
+ defined(CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED)
+
+#error Minix file system byte order broken
+
+#elif defined(CONFIG_MINIX_FS_NATIVE_ENDIAN)
+
+/*
+ * big-endian 32 or 64 bit indexed bitmaps on big-endian system or
+ * little-endian bitmaps on little-endian system
+ */
+
+#define minix_test_and_set_bit(nr, addr) \
+ __test_and_set_bit((nr), (unsigned long *)(addr))
+#define minix_set_bit(nr, addr) \
+ __set_bit((nr), (unsigned long *)(addr))
+#define minix_test_and_clear_bit(nr, addr) \
+ __test_and_clear_bit((nr), (unsigned long *)(addr))
+#define minix_test_bit(nr, addr) \
+ test_bit((nr), (unsigned long *)(addr))
+#define minix_find_first_zero_bit(addr, size) \
+ find_first_zero_bit((unsigned long *)(addr), (size))
+
+#elif defined(CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED)
+
+/*
+ * big-endian 16bit indexed bitmaps
+ */
+
+static inline int minix_find_first_zero_bit(const void *vaddr, unsigned size)
+{
+ const unsigned short *p = vaddr, *addr = vaddr;
+ unsigned short num;
+
+ if (!size)
+ return 0;
+
+ size >>= 4;
+ while (*p++ == 0xffff) {
+ if (--size == 0)
+ return (p - addr) << 4;
+ }
+
+ num = *--p;
+ return ((p - addr) << 4) + ffz(num);
+}
+
+#define minix_test_and_set_bit(nr, addr) \
+ __test_and_set_bit((nr) ^ 16, (unsigned long *)(addr))
+#define minix_set_bit(nr, addr) \
+ __set_bit((nr) ^ 16, (unsigned long *)(addr))
+#define minix_test_and_clear_bit(nr, addr) \
+ __test_and_clear_bit((nr) ^ 16, (unsigned long *)(addr))
+
+static inline int minix_test_bit(int nr, const void *vaddr)
+{
+ const unsigned short *p = vaddr;
+ return (p[nr >> 4] & (1U << (nr & 15))) != 0;
+}
+
+#else
+
+/*
+ * little-endian bitmaps
+ */
+
+#define minix_test_and_set_bit __test_and_set_bit_le
+#define minix_set_bit __set_bit_le
+#define minix_test_and_clear_bit __test_and_clear_bit_le
+#define minix_test_bit test_bit_le
+#define minix_find_first_zero_bit find_first_zero_bit_le
+
+#endif
+
+#endif /* FS_MINIX_H */
Code Review / kvmfornfv.git / blobdiff