939b00df03
This morning I needed to read a Minix V3 filesystem, but unfortunately my 2.6.19 did not support that, and neither did the downloaded 2.6.20rc4. Fortunately, google told me that Daniel Aragones had already done the work, patch found at http://www.terra.es/personal2/danarag/ Unfortunaly, looking at the patch was painful to my eyes, so I polished it a bit before applying. The resulting kernel boots, and reads the filesystem it needed to read. Signed-off-by: Daniel Aragones <danarag@gmail.com> Signed-off-by: Andries Brouwer <aeb@cwi.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
93 lines
3.3 KiB
C
93 lines
3.3 KiB
C
#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/minix_fs.h>
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/*
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* change the define below to 0 if you want names > info->s_namelen chars to be
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* truncated. Else they will be disallowed (ENAMETOOLONG).
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*/
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#define NO_TRUNCATE 1
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#define INODE_VERSION(inode) minix_sb(inode->i_sb)->s_version
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#define MINIX_V1 0x0001 /* original minix fs */
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#define MINIX_V2 0x0002 /* minix V2 fs */
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#define MINIX_V3 0x0003 /* minix V3 fs */
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/*
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* minix fs inode data in memory
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*/
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struct minix_inode_info {
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union {
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__u16 i1_data[16];
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__u32 i2_data[16];
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} u;
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struct inode vfs_inode;
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};
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/*
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* minix super-block data in memory
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*/
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struct minix_sb_info {
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unsigned long s_ninodes;
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unsigned long s_nzones;
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unsigned long s_imap_blocks;
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unsigned long s_zmap_blocks;
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unsigned long s_firstdatazone;
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unsigned long s_log_zone_size;
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unsigned long s_max_size;
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int s_dirsize;
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int s_namelen;
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int s_link_max;
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struct buffer_head ** s_imap;
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struct buffer_head ** s_zmap;
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struct buffer_head * s_sbh;
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struct minix_super_block * s_ms;
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unsigned short s_mount_state;
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unsigned short s_version;
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};
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extern struct minix_inode * minix_V1_raw_inode(struct super_block *, ino_t, struct buffer_head **);
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extern struct minix2_inode * minix_V2_raw_inode(struct super_block *, ino_t, struct buffer_head **);
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extern struct inode * minix_new_inode(const struct inode * dir, int * error);
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extern void minix_free_inode(struct inode * inode);
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extern unsigned long minix_count_free_inodes(struct minix_sb_info *sbi);
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extern int minix_new_block(struct inode * inode);
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extern void minix_free_block(struct inode *inode, unsigned long block);
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extern unsigned long minix_count_free_blocks(struct minix_sb_info *sbi);
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extern int minix_getattr(struct vfsmount *, struct dentry *, struct kstat *);
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extern void V1_minix_truncate(struct inode *);
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extern void V2_minix_truncate(struct inode *);
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extern void minix_truncate(struct inode *);
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extern int minix_sync_inode(struct inode *);
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extern void minix_set_inode(struct inode *, dev_t);
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extern int V1_minix_get_block(struct inode *, long, struct buffer_head *, int);
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extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int);
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extern unsigned V1_minix_blocks(loff_t, struct super_block *);
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extern unsigned V2_minix_blocks(loff_t, struct super_block *);
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extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**);
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extern int minix_add_link(struct dentry*, struct inode*);
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extern int minix_delete_entry(struct minix_dir_entry*, struct page*);
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extern int minix_make_empty(struct inode*, struct inode*);
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extern int minix_empty_dir(struct inode*);
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extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*);
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extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**);
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extern ino_t minix_inode_by_name(struct dentry*);
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extern int minix_sync_file(struct file *, struct dentry *, int);
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extern struct inode_operations minix_file_inode_operations;
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extern struct inode_operations minix_dir_inode_operations;
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extern const struct file_operations minix_file_operations;
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extern const struct file_operations minix_dir_operations;
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extern struct dentry_operations minix_dentry_operations;
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static inline struct minix_sb_info *minix_sb(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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static inline struct minix_inode_info *minix_i(struct inode *inode)
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{
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return list_entry(inode, struct minix_inode_info, vfs_inode);
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}
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