^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) #ifndef FS_MINIX_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) #define FS_MINIX_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/pagemap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/minix_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #define INODE_VERSION(inode) minix_sb(inode->i_sb)->s_version
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #define MINIX_V1 0x0001 /* original minix fs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #define MINIX_V2 0x0002 /* minix V2 fs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #define MINIX_V3 0x0003 /* minix V3 fs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * minix fs inode data in memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct minix_inode_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) __u16 i1_data[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) __u32 i2_data[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) } u;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct inode vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * minix super-block data in memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) struct minix_sb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) unsigned long s_ninodes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) unsigned long s_nzones;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) unsigned long s_imap_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) unsigned long s_zmap_blocks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) unsigned long s_firstdatazone;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) unsigned long s_log_zone_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int s_dirsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) int s_namelen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct buffer_head ** s_imap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct buffer_head ** s_zmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct buffer_head * s_sbh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct minix_super_block * s_ms;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) unsigned short s_mount_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) unsigned short s_version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) extern struct inode *minix_iget(struct super_block *, unsigned long);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) extern struct inode * minix_new_inode(const struct inode *, umode_t, int *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) extern void minix_free_inode(struct inode * inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) extern unsigned long minix_count_free_inodes(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) extern int minix_new_block(struct inode * inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) extern void minix_free_block(struct inode *inode, unsigned long block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) extern unsigned long minix_count_free_blocks(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) extern int minix_getattr(const struct path *, struct kstat *, u32, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) extern int minix_prepare_chunk(struct page *page, loff_t pos, unsigned len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) extern void V1_minix_truncate(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) extern void V2_minix_truncate(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) extern void minix_truncate(struct inode *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) extern void minix_set_inode(struct inode *, dev_t);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) extern unsigned V1_minix_blocks(loff_t, struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) extern unsigned V2_minix_blocks(loff_t, struct super_block *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) extern int minix_add_link(struct dentry*, struct inode*);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) extern int minix_make_empty(struct inode*, struct inode*);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) extern int minix_empty_dir(struct inode*);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) extern ino_t minix_inode_by_name(struct dentry*);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) extern const struct inode_operations minix_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) extern const struct inode_operations minix_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) extern const struct file_operations minix_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) extern const struct file_operations minix_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static inline struct minix_sb_info *minix_sb(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) return sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static inline struct minix_inode_info *minix_i(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return container_of(inode, struct minix_inode_info, vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static inline unsigned minix_blocks_needed(unsigned bits, unsigned blocksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return DIV_ROUND_UP(bits, blocksize * 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) #if defined(CONFIG_MINIX_FS_NATIVE_ENDIAN) && \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) defined(CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) #error Minix file system byte order broken
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) #elif defined(CONFIG_MINIX_FS_NATIVE_ENDIAN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) * big-endian 32 or 64 bit indexed bitmaps on big-endian system or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) * little-endian bitmaps on little-endian system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #define minix_test_and_set_bit(nr, addr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) __test_and_set_bit((nr), (unsigned long *)(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define minix_set_bit(nr, addr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) __set_bit((nr), (unsigned long *)(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define minix_test_and_clear_bit(nr, addr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) __test_and_clear_bit((nr), (unsigned long *)(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define minix_test_bit(nr, addr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) test_bit((nr), (unsigned long *)(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define minix_find_first_zero_bit(addr, size) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) find_first_zero_bit((unsigned long *)(addr), (size))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #elif defined(CONFIG_MINIX_FS_BIG_ENDIAN_16BIT_INDEXED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * big-endian 16bit indexed bitmaps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static inline int minix_find_first_zero_bit(const void *vaddr, unsigned size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) const unsigned short *p = vaddr, *addr = vaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) unsigned short num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (!size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) size >>= 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) while (*p++ == 0xffff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (--size == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) return (p - addr) << 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) num = *--p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return ((p - addr) << 4) + ffz(num);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) #define minix_test_and_set_bit(nr, addr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) __test_and_set_bit((nr) ^ 16, (unsigned long *)(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #define minix_set_bit(nr, addr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) __set_bit((nr) ^ 16, (unsigned long *)(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) #define minix_test_and_clear_bit(nr, addr) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) __test_and_clear_bit((nr) ^ 16, (unsigned long *)(addr))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static inline int minix_test_bit(int nr, const void *vaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) const unsigned short *p = vaddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return (p[nr >> 4] & (1U << (nr & 15))) != 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * little-endian bitmaps
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) #define minix_test_and_set_bit __test_and_set_bit_le
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) #define minix_set_bit __set_bit_le
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) #define minix_test_and_clear_bit __test_and_clear_bit_le
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) #define minix_test_bit test_bit_le
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) #define minix_find_first_zero_bit find_first_zero_bit_le
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) #endif /* FS_MINIX_H */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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