--- /dev/null
+#include <linux/fs.h>
+#include <linux/adfs_fs.h>
+
+/* Internal data structures for ADFS */
+
+#define ADFS_FREE_FRAG 0
+#define ADFS_BAD_FRAG 1
+#define ADFS_ROOT_FRAG 2
+
+#define ADFS_NDA_OWNER_READ (1 << 0)
+#define ADFS_NDA_OWNER_WRITE (1 << 1)
+#define ADFS_NDA_LOCKED (1 << 2)
+#define ADFS_NDA_DIRECTORY (1 << 3)
+#define ADFS_NDA_EXECUTE (1 << 4)
+#define ADFS_NDA_PUBLIC_READ (1 << 5)
+#define ADFS_NDA_PUBLIC_WRITE (1 << 6)
+
+#include "dir_f.h"
+
+struct buffer_head;
+
+/*
+ * adfs file system inode data in memory
+ */
+struct adfs_inode_info {
+ loff_t mmu_private;
+ unsigned long parent_id; /* object id of parent */
+ __u32 loadaddr; /* RISC OS load address */
+ __u32 execaddr; /* RISC OS exec address */
+ unsigned int filetype; /* RISC OS file type */
+ unsigned int attr; /* RISC OS permissions */
+ unsigned int stamped:1; /* RISC OS file has date/time */
+ struct inode vfs_inode;
+};
+
+/*
+ * Forward-declare this
+ */
+struct adfs_discmap;
+struct adfs_dir_ops;
+
+/*
+ * ADFS file system superblock data in memory
+ */
+struct adfs_sb_info {
+ union { struct {
+ struct adfs_discmap *s_map; /* bh list containing map */
+ struct adfs_dir_ops *s_dir; /* directory operations */
+ };
+ struct rcu_head rcu; /* used only at shutdown time */
+ };
+ kuid_t s_uid; /* owner uid */
+ kgid_t s_gid; /* owner gid */
+ umode_t s_owner_mask; /* ADFS owner perm -> unix perm */
+ umode_t s_other_mask; /* ADFS other perm -> unix perm */
+ int s_ftsuffix; /* ,xyz hex filetype suffix option */
+
+ __u32 s_ids_per_zone; /* max. no ids in one zone */
+ __u32 s_idlen; /* length of ID in map */
+ __u32 s_map_size; /* sector size of a map */
+ unsigned long s_size; /* total size (in blocks) of this fs */
+ signed int s_map2blk; /* shift left by this for map->sector */
+ unsigned int s_log2sharesize;/* log2 share size */
+ __le32 s_version; /* disc format version */
+ unsigned int s_namelen; /* maximum number of characters in name */
+};
+
+static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
+static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
+{
+ return container_of(inode, struct adfs_inode_info, vfs_inode);
+}
+
+/*
+ * Directory handling
+ */
+struct adfs_dir {
+ struct super_block *sb;
+
+ int nr_buffers;
+ struct buffer_head *bh[4];
+
+ /* big directories need allocated buffers */
+ struct buffer_head **bh_fplus;
+
+ unsigned int pos;
+ unsigned int parent_id;
+
+ struct adfs_dirheader dirhead;
+ union adfs_dirtail dirtail;
+};
+
+/*
+ * This is the overall maximum name length
+ */
+#define ADFS_MAX_NAME_LEN (256 + 4) /* +4 for ,xyz hex filetype suffix */
+struct object_info {
+ __u32 parent_id; /* parent object id */
+ __u32 file_id; /* object id */
+ __u32 loadaddr; /* load address */
+ __u32 execaddr; /* execution address */
+ __u32 size; /* size */
+ __u8 attr; /* RISC OS attributes */
+ unsigned int name_len; /* name length */
+ char name[ADFS_MAX_NAME_LEN];/* file name */
+
+ /* RISC OS file type (12-bit: derived from loadaddr) */
+ __u16 filetype;
+};
+
+/* RISC OS 12-bit filetype converts to ,xyz hex filename suffix */
+static inline int append_filetype_suffix(char *buf, __u16 filetype)
+{
+ if (filetype == 0xffff) /* no explicit 12-bit file type was set */
+ return 0;
+
+ *buf++ = ',';
+ *buf++ = hex_asc_lo(filetype >> 8);
+ *buf++ = hex_asc_lo(filetype >> 4);
+ *buf++ = hex_asc_lo(filetype >> 0);
+ return 4;
+}
+
+struct adfs_dir_ops {
+ int (*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir);
+ int (*setpos)(struct adfs_dir *dir, unsigned int fpos);
+ int (*getnext)(struct adfs_dir *dir, struct object_info *obj);
+ int (*update)(struct adfs_dir *dir, struct object_info *obj);
+ int (*create)(struct adfs_dir *dir, struct object_info *obj);
+ int (*remove)(struct adfs_dir *dir, struct object_info *obj);
+ int (*sync)(struct adfs_dir *dir);
+ void (*free)(struct adfs_dir *dir);
+};
+
+struct adfs_discmap {
+ struct buffer_head *dm_bh;
+ __u32 dm_startblk;
+ unsigned int dm_startbit;
+ unsigned int dm_endbit;
+};
+
+/* Inode stuff */
+struct inode *adfs_iget(struct super_block *sb, struct object_info *obj);
+int adfs_write_inode(struct inode *inode, struct writeback_control *wbc);
+int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
+
+/* map.c */
+extern int adfs_map_lookup(struct super_block *sb, unsigned int frag_id, unsigned int offset);
+extern unsigned int adfs_map_free(struct super_block *sb);
+
+/* Misc */
+__printf(3, 4)
+void __adfs_error(struct super_block *sb, const char *function,
+ const char *fmt, ...);
+#define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt)
+
+/* super.c */
+
+/*
+ * Inodes and file operations
+ */
+
+/* dir_*.c */
+extern const struct inode_operations adfs_dir_inode_operations;
+extern const struct file_operations adfs_dir_operations;
+extern const struct dentry_operations adfs_dentry_operations;
+extern struct adfs_dir_ops adfs_f_dir_ops;
+extern struct adfs_dir_ops adfs_fplus_dir_ops;
+
+extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
+ int wait);
+
+/* file.c */
+extern const struct inode_operations adfs_file_inode_operations;
+extern const struct file_operations adfs_file_operations;
+
+static inline __u32 signed_asl(__u32 val, signed int shift)
+{
+ if (shift >= 0)
+ val <<= shift;
+ else
+ val >>= -shift;
+ return val;
+}
+
+/*
+ * Calculate the address of a block in an object given the block offset
+ * and the object identity.
+ *
+ * The root directory ID should always be looked up in the map [3.4]
+ */
+static inline int
+__adfs_block_map(struct super_block *sb, unsigned int object_id,
+ unsigned int block)
+{
+ if (object_id & 255) {
+ unsigned int off;
+
+ off = (object_id & 255) - 1;
+ block += off << ADFS_SB(sb)->s_log2sharesize;
+ }
+
+ return adfs_map_lookup(sb, object_id >> 8, block);
+}
Code Review / kvmfornfv.git / blobdiff