| 1 |
1275 |
phoenix |
/*
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| 2 |
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* linux/fs/hpfs/inode.c
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| 3 |
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*
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| 4 |
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* Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
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| 5 |
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*
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| 6 |
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* inode VFS functions
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| 7 |
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*/
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| 8 |
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| 9 |
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#include <linux/sched.h>
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| 10 |
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#include <linux/smp_lock.h>
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| 11 |
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#include "hpfs_fn.h"
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| 12 |
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| 13 |
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static struct file_operations hpfs_file_ops =
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| 14 |
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{
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| 15 |
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llseek: generic_file_llseek,
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| 16 |
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read: generic_file_read,
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| 17 |
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write: hpfs_file_write,
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| 18 |
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mmap: generic_file_mmap,
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| 19 |
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open: hpfs_open,
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| 20 |
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release: hpfs_file_release,
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| 21 |
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fsync: hpfs_file_fsync,
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| 22 |
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};
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| 23 |
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| 24 |
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static struct inode_operations hpfs_file_iops =
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| 25 |
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{
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| 26 |
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truncate: hpfs_truncate,
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| 27 |
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setattr: hpfs_notify_change,
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| 28 |
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};
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| 30 |
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static struct file_operations hpfs_dir_ops =
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| 31 |
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{
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| 32 |
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llseek: hpfs_dir_lseek,
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| 33 |
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read: generic_read_dir,
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| 34 |
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readdir: hpfs_readdir,
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| 35 |
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open: hpfs_open,
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| 36 |
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release: hpfs_dir_release,
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fsync: hpfs_file_fsync,
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};
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| 40 |
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static struct inode_operations hpfs_dir_iops =
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| 41 |
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{
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| 42 |
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create: hpfs_create,
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| 43 |
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lookup: hpfs_lookup,
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| 44 |
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unlink: hpfs_unlink,
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| 45 |
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symlink: hpfs_symlink,
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mkdir: hpfs_mkdir,
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| 47 |
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rmdir: hpfs_rmdir,
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| 48 |
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mknod: hpfs_mknod,
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| 49 |
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rename: hpfs_rename,
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| 50 |
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setattr: hpfs_notify_change,
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| 51 |
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};
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| 52 |
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struct address_space_operations hpfs_symlink_aops = {
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readpage: hpfs_symlink_readpage
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};
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void hpfs_read_inode(struct inode *i)
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{
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struct buffer_head *bh;
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struct fnode *fnode;
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struct super_block *sb = i->i_sb;
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unsigned char *ea;
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int ea_size;
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init_MUTEX(&i->i_hpfs_sem);
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i->i_uid = sb->s_hpfs_uid;
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i->i_gid = sb->s_hpfs_gid;
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i->i_mode = sb->s_hpfs_mode;
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i->i_hpfs_conv = sb->s_hpfs_conv;
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| 69 |
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i->i_blksize = 512;
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| 70 |
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i->i_size = -1;
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| 71 |
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i->i_blocks = -1;
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| 72 |
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| 73 |
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i->i_hpfs_dno = 0;
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| 74 |
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i->i_hpfs_n_secs = 0;
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| 75 |
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i->i_hpfs_file_sec = 0;
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| 76 |
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i->i_hpfs_disk_sec = 0;
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| 77 |
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i->i_hpfs_dpos = 0;
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| 78 |
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i->i_hpfs_dsubdno = 0;
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| 79 |
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i->i_hpfs_ea_mode = 0;
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| 80 |
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i->i_hpfs_ea_uid = 0;
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| 81 |
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i->i_hpfs_ea_gid = 0;
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| 82 |
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i->i_hpfs_ea_size = 0;
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| 83 |
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i->i_version = ++event;
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| 84 |
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| 85 |
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i->i_hpfs_rddir_off = NULL;
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| 86 |
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i->i_hpfs_dirty = 0;
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| 87 |
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| 88 |
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i->i_atime = 0;
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| 89 |
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i->i_mtime = 0;
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| 90 |
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i->i_ctime = 0;
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| 91 |
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| 92 |
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if (!i->i_sb->s_hpfs_rd_inode)
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hpfs_error(i->i_sb, "read_inode: s_hpfs_rd_inode == 0");
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if (i->i_sb->s_hpfs_rd_inode == 2) {
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i->i_mode |= S_IFREG;
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i->i_mode &= ~0111;
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i->i_op = &hpfs_file_iops;
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| 98 |
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i->i_fop = &hpfs_file_ops;
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| 99 |
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i->i_nlink = 1;
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| 100 |
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return;
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| 101 |
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}
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| 102 |
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if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
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| 103 |
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/*i->i_mode |= S_IFREG;
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| 104 |
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i->i_mode &= ~0111;
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i->i_op = &hpfs_file_iops;
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| 106 |
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i->i_fop = &hpfs_file_ops;
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| 107 |
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i->i_nlink = 0;*/
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| 108 |
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make_bad_inode(i);
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return;
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| 110 |
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}
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| 111 |
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if (i->i_sb->s_hpfs_eas) {
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if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
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| 113 |
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if (ea_size == 2) {
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| 114 |
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i->i_uid = ea[0] + (ea[1] << 8);
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| 115 |
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i->i_hpfs_ea_uid = 1;
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| 116 |
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}
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| 117 |
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kfree(ea);
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| 118 |
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}
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| 119 |
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if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
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| 120 |
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if (ea_size == 2) {
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i->i_gid = ea[0] + (ea[1] << 8);
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| 122 |
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i->i_hpfs_ea_gid = 1;
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| 123 |
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}
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| 124 |
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kfree(ea);
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| 125 |
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}
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| 126 |
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if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) {
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| 127 |
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kfree(ea);
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| 128 |
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i->i_mode = S_IFLNK | 0777;
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| 129 |
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i->i_op = &page_symlink_inode_operations;
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| 130 |
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i->i_data.a_ops = &hpfs_symlink_aops;
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| 131 |
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i->i_nlink = 1;
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| 132 |
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i->i_size = ea_size;
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| 133 |
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i->i_blocks = 1;
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| 134 |
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brelse(bh);
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| 135 |
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return;
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| 136 |
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}
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| 137 |
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if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) {
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| 138 |
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int rdev = 0;
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| 139 |
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umode_t mode = sb->s_hpfs_mode;
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| 140 |
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if (ea_size == 2) {
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| 141 |
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mode = ea[0] + (ea[1] << 8);
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| 142 |
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i->i_hpfs_ea_mode = 1;
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| 143 |
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}
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| 144 |
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kfree(ea);
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| 145 |
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i->i_mode = mode;
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| 146 |
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if (S_ISBLK(mode) || S_ISCHR(mode)) {
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| 147 |
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if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) {
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| 148 |
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if (ea_size == 4)
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| 149 |
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rdev = ea[0] + (ea[1] << 8) + (ea[2] << 16) + (ea[3] << 24);
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| 150 |
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kfree(ea);
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| 151 |
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}
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| 152 |
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}
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| 153 |
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if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
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| 154 |
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brelse(bh);
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| 155 |
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i->i_nlink = 1;
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| 156 |
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i->i_size = 0;
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| 157 |
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i->i_blocks = 1;
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| 158 |
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init_special_inode(i, mode, rdev);
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| 159 |
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return;
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| 160 |
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}
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| 161 |
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}
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| 162 |
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}
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| 163 |
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if (fnode->dirflag) {
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| 164 |
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unsigned n_dnodes, n_subdirs;
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| 165 |
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i->i_mode |= S_IFDIR;
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| 166 |
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i->i_op = &hpfs_dir_iops;
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| 167 |
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i->i_fop = &hpfs_dir_ops;
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| 168 |
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i->i_hpfs_parent_dir = fnode->up;
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| 169 |
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i->i_hpfs_dno = fnode->u.external[0].disk_secno;
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| 170 |
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if (sb->s_hpfs_chk >= 2) {
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| 171 |
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struct buffer_head *bh0;
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| 172 |
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if (hpfs_map_fnode(sb, i->i_hpfs_parent_dir, &bh0)) brelse(bh0);
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| 173 |
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}
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| 174 |
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n_dnodes = 0; n_subdirs = 0;
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| 175 |
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hpfs_count_dnodes(i->i_sb, i->i_hpfs_dno, &n_dnodes, &n_subdirs, NULL);
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| 176 |
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i->i_blocks = 4 * n_dnodes;
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| 177 |
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i->i_size = 2048 * n_dnodes;
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| 178 |
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i->i_nlink = 2 + n_subdirs;
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| 179 |
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} else {
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| 180 |
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i->i_mode |= S_IFREG;
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| 181 |
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if (!i->i_hpfs_ea_mode) i->i_mode &= ~0111;
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| 182 |
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i->i_op = &hpfs_file_iops;
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| 183 |
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i->i_fop = &hpfs_file_ops;
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| 184 |
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i->i_nlink = 1;
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| 185 |
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i->i_size = fnode->file_size;
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| 186 |
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i->i_blocks = ((i->i_size + 511) >> 9) + 1;
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| 187 |
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i->i_data.a_ops = &hpfs_aops;
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| 188 |
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i->u.hpfs_i.mmu_private = i->i_size;
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| 189 |
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}
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| 190 |
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brelse(bh);
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| 191 |
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}
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| 192 |
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| 193 |
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void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode)
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| 194 |
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{
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| 195 |
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if (fnode->acl_size_l || fnode->acl_size_s) {
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| 196 |
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/* Some unknown structures like ACL may be in fnode,
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| 197 |
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we'd better not overwrite them */
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| 198 |
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hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 stuctures", i->i_ino);
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| 199 |
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} else if (i->i_sb->s_hpfs_eas >= 2) {
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| 200 |
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unsigned char ea[4];
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| 201 |
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if ((i->i_uid != i->i_sb->s_hpfs_uid) || i->i_hpfs_ea_uid) {
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| 202 |
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ea[0] = i->i_uid & 0xff;
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| 203 |
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ea[1] = i->i_uid >> 8;
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| 204 |
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hpfs_set_ea(i, fnode, "UID", ea, 2);
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| 205 |
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i->i_hpfs_ea_uid = 1;
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| 206 |
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}
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| 207 |
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if ((i->i_gid != i->i_sb->s_hpfs_gid) || i->i_hpfs_ea_gid) {
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| 208 |
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ea[0] = i->i_gid & 0xff;
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| 209 |
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ea[1] = i->i_gid >> 8;
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| 210 |
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hpfs_set_ea(i, fnode, "GID", ea, 2);
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| 211 |
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i->i_hpfs_ea_gid = 1;
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| 212 |
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}
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| 213 |
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if (!S_ISLNK(i->i_mode))
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| 214 |
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if ((i->i_mode != ((i->i_sb->s_hpfs_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111))
|
| 215 |
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| (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))
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| 216 |
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&& i->i_mode != ((i->i_sb->s_hpfs_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333))
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| 217 |
|
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| (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || i->i_hpfs_ea_mode) {
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| 218 |
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ea[0] = i->i_mode & 0xff;
|
| 219 |
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ea[1] = i->i_mode >> 8;
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| 220 |
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hpfs_set_ea(i, fnode, "MODE", ea, 2);
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| 221 |
|
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i->i_hpfs_ea_mode = 1;
|
| 222 |
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}
|
| 223 |
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if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) {
|
| 224 |
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int d = kdev_t_to_nr(i->i_rdev);
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| 225 |
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ea[0] = d & 0xff;
|
| 226 |
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ea[1] = (d >> 8) & 0xff;
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| 227 |
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ea[2] = (d >> 16) & 0xff;
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| 228 |
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ea[3] = d >> 24;
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| 229 |
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hpfs_set_ea(i, fnode, "DEV", ea, 4);
|
| 230 |
|
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}
|
| 231 |
|
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}
|
| 232 |
|
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}
|
| 233 |
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|
| 234 |
|
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void hpfs_write_inode(struct inode *i)
|
| 235 |
|
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{
|
| 236 |
|
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struct inode *parent;
|
| 237 |
|
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if (!i->i_nlink) return;
|
| 238 |
|
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if (i->i_ino == i->i_sb->s_hpfs_root) return;
|
| 239 |
|
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if (i->i_hpfs_rddir_off && !atomic_read(&i->i_count)) {
|
| 240 |
|
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if (*i->i_hpfs_rddir_off) printk("HPFS: write_inode: some position still there\n");
|
| 241 |
|
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kfree(i->i_hpfs_rddir_off);
|
| 242 |
|
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i->i_hpfs_rddir_off = NULL;
|
| 243 |
|
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}
|
| 244 |
|
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i->i_hpfs_dirty = 0;
|
| 245 |
|
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hpfs_lock_iget(i->i_sb, 1);
|
| 246 |
|
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parent = iget(i->i_sb, i->i_hpfs_parent_dir);
|
| 247 |
|
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hpfs_unlock_iget(i->i_sb);
|
| 248 |
|
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hpfs_lock_inode(parent);
|
| 249 |
|
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hpfs_write_inode_nolock(i);
|
| 250 |
|
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hpfs_unlock_inode(parent);
|
| 251 |
|
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iput(parent);
|
| 252 |
|
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}
|
| 253 |
|
|
|
| 254 |
|
|
void hpfs_write_inode_nolock(struct inode *i)
|
| 255 |
|
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{
|
| 256 |
|
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struct buffer_head *bh;
|
| 257 |
|
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struct fnode *fnode;
|
| 258 |
|
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struct quad_buffer_head qbh;
|
| 259 |
|
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struct hpfs_dirent *de;
|
| 260 |
|
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if (i->i_ino == i->i_sb->s_hpfs_root) return;
|
| 261 |
|
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if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
|
| 262 |
|
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if (i->i_ino != i->i_sb->s_hpfs_root) {
|
| 263 |
|
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if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) {
|
| 264 |
|
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brelse(bh);
|
| 265 |
|
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return;
|
| 266 |
|
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}
|
| 267 |
|
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} else de = NULL;
|
| 268 |
|
|
if (S_ISREG(i->i_mode)) {
|
| 269 |
|
|
fnode->file_size = de->file_size = i->i_size;
|
| 270 |
|
|
} else if (S_ISDIR(i->i_mode)) {
|
| 271 |
|
|
fnode->file_size = de->file_size = 0;
|
| 272 |
|
|
}
|
| 273 |
|
|
hpfs_write_inode_ea(i, fnode);
|
| 274 |
|
|
if (de) {
|
| 275 |
|
|
de->write_date = gmt_to_local(i->i_sb, i->i_mtime);
|
| 276 |
|
|
de->read_date = gmt_to_local(i->i_sb, i->i_atime);
|
| 277 |
|
|
de->creation_date = gmt_to_local(i->i_sb, i->i_ctime);
|
| 278 |
|
|
de->read_only = !(i->i_mode & 0222);
|
| 279 |
|
|
de->ea_size = i->i_hpfs_ea_size;
|
| 280 |
|
|
hpfs_mark_4buffers_dirty(&qbh);
|
| 281 |
|
|
hpfs_brelse4(&qbh);
|
| 282 |
|
|
}
|
| 283 |
|
|
if (S_ISDIR(i->i_mode)) {
|
| 284 |
|
|
if ((de = map_dirent(i, i->i_hpfs_dno, "\001\001", 2, NULL, &qbh))) {
|
| 285 |
|
|
de->write_date = gmt_to_local(i->i_sb, i->i_mtime);
|
| 286 |
|
|
de->read_date = gmt_to_local(i->i_sb, i->i_atime);
|
| 287 |
|
|
de->creation_date = gmt_to_local(i->i_sb, i->i_ctime);
|
| 288 |
|
|
de->read_only = !(i->i_mode & 0222);
|
| 289 |
|
|
de->ea_size = /*i->i_hpfs_ea_size*/0;
|
| 290 |
|
|
de->file_size = 0;
|
| 291 |
|
|
hpfs_mark_4buffers_dirty(&qbh);
|
| 292 |
|
|
hpfs_brelse4(&qbh);
|
| 293 |
|
|
} else hpfs_error(i->i_sb, "directory %08x doesn't have '.' entry", i->i_ino);
|
| 294 |
|
|
}
|
| 295 |
|
|
mark_buffer_dirty(bh);
|
| 296 |
|
|
brelse(bh);
|
| 297 |
|
|
}
|
| 298 |
|
|
|
| 299 |
|
|
int hpfs_notify_change(struct dentry *dentry, struct iattr *attr)
|
| 300 |
|
|
{
|
| 301 |
|
|
struct inode *inode = dentry->d_inode;
|
| 302 |
|
|
int error;
|
| 303 |
|
|
if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
|
| 304 |
|
|
return -EINVAL;
|
| 305 |
|
|
if (inode->i_sb->s_hpfs_root == inode->i_ino) return -EINVAL;
|
| 306 |
|
|
if ((error = inode_change_ok(inode, attr))) return error;
|
| 307 |
|
|
error = inode_setattr(inode, attr);
|
| 308 |
|
|
if (error) return error;
|
| 309 |
|
|
hpfs_write_inode(inode);
|
| 310 |
|
|
return 0;
|
| 311 |
|
|
}
|
| 312 |
|
|
|
| 313 |
|
|
void hpfs_write_if_changed(struct inode *inode)
|
| 314 |
|
|
{
|
| 315 |
|
|
if (inode->i_hpfs_dirty) {
|
| 316 |
|
|
hpfs_write_inode(inode);
|
| 317 |
|
|
}
|
| 318 |
|
|
}
|
| 319 |
|
|
|
| 320 |
|
|
void hpfs_delete_inode(struct inode *inode)
|
| 321 |
|
|
{
|
| 322 |
|
|
lock_kernel();
|
| 323 |
|
|
hpfs_remove_fnode(inode->i_sb, inode->i_ino);
|
| 324 |
|
|
unlock_kernel();
|
| 325 |
|
|
clear_inode(inode);
|
| 326 |
|
|
}
|
