1 /* 2 * linux/fs/hpfs/inode.c 3 * 4 * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 5 * 6 * inode VFS functions 7 */ 8 9 #include "hpfs_fn.h" 10 11 void hpfs_init_inode(struct inode *i) 12 { 13 struct super_block *sb = i->i_sb; 14 struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 15 16 i->i_uid = hpfs_sb(sb)->sb_uid; 17 i->i_gid = hpfs_sb(sb)->sb_gid; 18 i->i_mode = hpfs_sb(sb)->sb_mode; 19 hpfs_inode->i_conv = hpfs_sb(sb)->sb_conv; 20 i->i_blksize = 512; 21 i->i_size = -1; 22 i->i_blocks = -1; 23 24 hpfs_inode->i_dno = 0; 25 hpfs_inode->i_n_secs = 0; 26 hpfs_inode->i_file_sec = 0; 27 hpfs_inode->i_disk_sec = 0; 28 hpfs_inode->i_dpos = 0; 29 hpfs_inode->i_dsubdno = 0; 30 hpfs_inode->i_ea_mode = 0; 31 hpfs_inode->i_ea_uid = 0; 32 hpfs_inode->i_ea_gid = 0; 33 hpfs_inode->i_ea_size = 0; 34 35 hpfs_inode->i_rddir_off = NULL; 36 hpfs_inode->i_dirty = 0; 37 38 i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0; 39 i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0; 40 i->i_atime.tv_sec = i->i_atime.tv_nsec = 0; 41 } 42 43 void hpfs_read_inode(struct inode *i) 44 { 45 struct buffer_head *bh; 46 struct fnode *fnode; 47 struct super_block *sb = i->i_sb; 48 struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 49 unsigned char *ea; 50 int ea_size; 51 52 if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) { 53 /*i->i_mode |= S_IFREG; 54 i->i_mode &= ~0111; 55 i->i_op = &hpfs_file_iops; 56 i->i_fop = &hpfs_file_ops; 57 i->i_nlink = 0;*/ 58 make_bad_inode(i); 59 return; 60 } 61 if (hpfs_sb(i->i_sb)->sb_eas) { 62 if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) { 63 if (ea_size == 2) { 64 i->i_uid = le16_to_cpu(*(u16*)ea); 65 hpfs_inode->i_ea_uid = 1; 66 } 67 kfree(ea); 68 } 69 if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) { 70 if (ea_size == 2) { 71 i->i_gid = le16_to_cpu(*(u16*)ea); 72 hpfs_inode->i_ea_gid = 1; 73 } 74 kfree(ea); 75 } 76 if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) { 77 kfree(ea); 78 i->i_mode = S_IFLNK | 0777; 79 i->i_op = &page_symlink_inode_operations; 80 i->i_data.a_ops = &hpfs_symlink_aops; 81 i->i_nlink = 1; 82 i->i_size = ea_size; 83 i->i_blocks = 1; 84 brelse(bh); 85 return; 86 } 87 if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) { 88 int rdev = 0; 89 umode_t mode = hpfs_sb(sb)->sb_mode; 90 if (ea_size == 2) { 91 mode = le16_to_cpu(*(u16*)ea); 92 hpfs_inode->i_ea_mode = 1; 93 } 94 kfree(ea); 95 i->i_mode = mode; 96 if (S_ISBLK(mode) || S_ISCHR(mode)) { 97 if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) { 98 if (ea_size == 4) 99 rdev = le32_to_cpu(*(u32*)ea); 100 kfree(ea); 101 } 102 } 103 if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 104 brelse(bh); 105 i->i_nlink = 1; 106 i->i_size = 0; 107 i->i_blocks = 1; 108 init_special_inode(i, mode, 109 new_decode_dev(rdev)); 110 return; 111 } 112 } 113 } 114 if (fnode->dirflag) { 115 unsigned n_dnodes, n_subdirs; 116 i->i_mode |= S_IFDIR; 117 i->i_op = &hpfs_dir_iops; 118 i->i_fop = &hpfs_dir_ops; 119 hpfs_inode->i_parent_dir = fnode->up; 120 hpfs_inode->i_dno = fnode->u.external[0].disk_secno; 121 if (hpfs_sb(sb)->sb_chk >= 2) { 122 struct buffer_head *bh0; 123 if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0); 124 } 125 n_dnodes = 0; n_subdirs = 0; 126 hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL); 127 i->i_blocks = 4 * n_dnodes; 128 i->i_size = 2048 * n_dnodes; 129 i->i_nlink = 2 + n_subdirs; 130 } else { 131 i->i_mode |= S_IFREG; 132 if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111; 133 i->i_op = &hpfs_file_iops; 134 i->i_fop = &hpfs_file_ops; 135 i->i_nlink = 1; 136 i->i_size = fnode->file_size; 137 i->i_blocks = ((i->i_size + 511) >> 9) + 1; 138 i->i_data.a_ops = &hpfs_aops; 139 hpfs_i(i)->mmu_private = i->i_size; 140 } 141 brelse(bh); 142 } 143 144 static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode) 145 { 146 struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 147 /*if (fnode->acl_size_l || fnode->acl_size_s) { 148 Some unknown structures like ACL may be in fnode, 149 we'd better not overwrite them 150 hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 stuctures", i->i_ino); 151 } else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) { 152 u32 ea; 153 if ((i->i_uid != hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) { 154 ea = cpu_to_le32(i->i_uid); 155 hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2); 156 hpfs_inode->i_ea_uid = 1; 157 } 158 if ((i->i_gid != hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) { 159 ea = cpu_to_le32(i->i_gid); 160 hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2); 161 hpfs_inode->i_ea_gid = 1; 162 } 163 if (!S_ISLNK(i->i_mode)) 164 if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111)) 165 | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG)) 166 && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333)) 167 | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) { 168 ea = cpu_to_le32(i->i_mode); 169 hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2); 170 hpfs_inode->i_ea_mode = 1; 171 } 172 if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) { 173 ea = cpu_to_le32(new_encode_dev(i->i_rdev)); 174 hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4); 175 } 176 } 177 } 178 179 void hpfs_write_inode(struct inode *i) 180 { 181 struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 182 struct inode *parent; 183 if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; 184 if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) { 185 if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n"); 186 kfree(hpfs_inode->i_rddir_off); 187 hpfs_inode->i_rddir_off = NULL; 188 } 189 down(&hpfs_inode->i_parent); 190 if (!i->i_nlink) { 191 up(&hpfs_inode->i_parent); 192 return; 193 } 194 parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir); 195 if (parent) { 196 hpfs_inode->i_dirty = 0; 197 if (parent->i_state & I_NEW) { 198 hpfs_init_inode(parent); 199 hpfs_read_inode(parent); 200 unlock_new_inode(parent); 201 } 202 down(&hpfs_inode->i_sem); 203 hpfs_write_inode_nolock(i); 204 up(&hpfs_inode->i_sem); 205 iput(parent); 206 } else { 207 mark_inode_dirty(i); 208 } 209 up(&hpfs_inode->i_parent); 210 } 211 212 void hpfs_write_inode_nolock(struct inode *i) 213 { 214 struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 215 struct buffer_head *bh; 216 struct fnode *fnode; 217 struct quad_buffer_head qbh; 218 struct hpfs_dirent *de; 219 if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; 220 if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return; 221 if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) { 222 if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) { 223 brelse(bh); 224 return; 225 } 226 } else de = NULL; 227 if (S_ISREG(i->i_mode)) { 228 fnode->file_size = i->i_size; 229 if (de) de->file_size = i->i_size; 230 } else if (S_ISDIR(i->i_mode)) { 231 fnode->file_size = 0; 232 if (de) de->file_size = 0; 233 } 234 hpfs_write_inode_ea(i, fnode); 235 if (de) { 236 de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); 237 de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); 238 de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); 239 de->read_only = !(i->i_mode & 0222); 240 de->ea_size = hpfs_inode->i_ea_size; 241 hpfs_mark_4buffers_dirty(&qbh); 242 hpfs_brelse4(&qbh); 243 } 244 if (S_ISDIR(i->i_mode)) { 245 if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) { 246 de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); 247 de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); 248 de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); 249 de->read_only = !(i->i_mode & 0222); 250 de->ea_size = /*hpfs_inode->i_ea_size*/0; 251 de->file_size = 0; 252 hpfs_mark_4buffers_dirty(&qbh); 253 hpfs_brelse4(&qbh); 254 } else hpfs_error(i->i_sb, "directory %08x doesn't have '.' entry", i->i_ino); 255 } 256 mark_buffer_dirty(bh); 257 brelse(bh); 258 } 259 260 int hpfs_notify_change(struct dentry *dentry, struct iattr *attr) 261 { 262 struct inode *inode = dentry->d_inode; 263 int error=0; 264 lock_kernel(); 265 if ( ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) || 266 (hpfs_sb(inode->i_sb)->sb_root == inode->i_ino) ) { 267 error = -EINVAL; 268 } else if ((error = inode_change_ok(inode, attr))) { 269 } else if ((error = inode_setattr(inode, attr))) { 270 } else { 271 hpfs_write_inode(inode); 272 } 273 unlock_kernel(); 274 return error; 275 } 276 277 void hpfs_write_if_changed(struct inode *inode) 278 { 279 struct hpfs_inode_info *hpfs_inode = hpfs_i(inode); 280 281 if (hpfs_inode->i_dirty) 282 hpfs_write_inode(inode); 283 } 284 285 void hpfs_delete_inode(struct inode *inode) 286 { 287 truncate_inode_pages(&inode->i_data, 0); 288 lock_kernel(); 289 hpfs_remove_fnode(inode->i_sb, inode->i_ino); 290 unlock_kernel(); 291 clear_inode(inode); 292 } 293