struct inode *sysv_iget(struct super_block *sb, unsigned int ino) { struct sysv_sb_info * sbi = SYSV_SB(sb); struct buffer_head * bh; struct sysv_inode * raw_inode; struct sysv_inode_info * si; struct inode *inode; unsigned int block; if (!ino || ino > sbi->s_ninodes) { printk("Bad inode number on dev %s: %d is out of range\n", sb->s_id, ino); return ERR_PTR(-EIO); } inode = iget_locked(sb, ino); if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; raw_inode = sysv_raw_inode(sb, ino, &bh); if (!raw_inode) { printk("Major problem: unable to read inode from dev %s\n", inode->i_sb->s_id); goto bad_inode; } /* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */ inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode); inode->i_uid = (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid); inode->i_gid = (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid); set_nlink(inode, fs16_to_cpu(sbi, raw_inode->i_nlink)); inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size); inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime); inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime); inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime); inode->i_ctime.tv_nsec = 0; inode->i_atime.tv_nsec = 0; inode->i_mtime.tv_nsec = 0; inode->i_blocks = 0; si = SYSV_I(inode); for (block = 0; block < 10+1+1+1; block++) read3byte(sbi, &raw_inode->i_data[3*block], (u8 *)&si->i_data[block]); brelse(bh); si->i_dir_start_lookup = 0; if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) sysv_set_inode(inode, old_decode_dev(fs32_to_cpu(sbi, si->i_data[0]))); else sysv_set_inode(inode, 0); unlock_new_inode(inode); return inode; bad_inode: iget_failed(inode); return ERR_PTR(-EIO); }
static int sysv_symlink(struct inode * dir, struct dentry * dentry, const char * symname) { int err = -ENAMETOOLONG; int l = strlen(symname)+1; struct inode * inode; if (l > dir->i_sb->s_blocksize) goto out; inode = sysv_new_inode(dir, S_IFLNK|0777); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out; sysv_set_inode(inode, 0); err = page_symlink(inode, symname, l); if (err) goto out_fail; mark_inode_dirty(inode); err = add_nondir(dentry, inode); out: return err; out_fail: inode_dec_link_count(inode); iput(inode); goto out; }
static int sysv_mknod(struct inode * dir, struct dentry * dentry, int mode, int rdev) { struct inode * inode = sysv_new_inode(dir, mode); int err = PTR_ERR(inode); if (!IS_ERR(inode)) { sysv_set_inode(inode, rdev); mark_inode_dirty(inode); err = add_nondir(dentry, inode); } return err; }
static int sysv_mknod(struct inode * dir, struct dentry * dentry, umode_t mode, dev_t rdev) { struct inode * inode; int err; if (!old_valid_dev(rdev)) return -EINVAL; inode = sysv_new_inode(dir, mode); err = PTR_ERR(inode); if (!IS_ERR(inode)) { sysv_set_inode(inode, rdev); mark_inode_dirty(inode); err = add_nondir(dentry, inode); } return err; }
static void sysv_read_inode(struct inode *inode) { struct super_block * sb = inode->i_sb; struct buffer_head * bh; struct sysv_inode * raw_inode; unsigned int block, ino; dev_t rdev = 0; ino = inode->i_ino; if (!ino || ino > sb->sv_ninodes) { printk("Bad inode number on dev %s: %d is out of range\n", inode->i_sb->s_id, ino); goto bad_inode; } raw_inode = sysv_raw_inode(sb, ino, &bh); if (!raw_inode) { printk("Major problem: unable to read inode from dev %s\n", inode->i_sb->s_id); goto bad_inode; } /* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */ inode->i_mode = fs16_to_cpu(sb, raw_inode->i_mode); inode->i_uid = (uid_t)fs16_to_cpu(sb, raw_inode->i_uid); inode->i_gid = (gid_t)fs16_to_cpu(sb, raw_inode->i_gid); inode->i_nlink = fs16_to_cpu(sb, raw_inode->i_nlink); inode->i_size = fs32_to_cpu(sb, raw_inode->i_size); inode->i_atime = fs32_to_cpu(sb, raw_inode->i_atime); inode->i_mtime = fs32_to_cpu(sb, raw_inode->i_mtime); inode->i_ctime = fs32_to_cpu(sb, raw_inode->i_ctime); inode->i_blocks = inode->i_blksize = 0; for (block = 0; block < 10+1+1+1; block++) read3byte(sb, &raw_inode->i_a.i_addb[3*block], (unsigned char*)&inode->u.sysv_i.i_data[block]); brelse(bh); if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) rdev = (u16)fs32_to_cpu(sb, inode->u.sysv_i.i_data[0]); inode->u.sysv_i.i_dir_start_lookup = 0; sysv_set_inode(inode, rdev); return; bad_inode: make_bad_inode(inode); return; }
static int sysv_mkdir(struct inode * dir, struct dentry *dentry, int mode) { struct inode * inode; int err = -EMLINK; if (dir->i_nlink >= SYSV_SB(dir->i_sb)->s_link_max) goto out; inode_inc_link_count(dir); inode = sysv_new_inode(dir, S_IFDIR|mode); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_dir; sysv_set_inode(inode, 0); inode_inc_link_count(inode); err = sysv_make_empty(inode, dir); if (err) goto out_fail; err = sysv_add_link(dentry, inode); if (err) goto out_fail; d_instantiate(dentry, inode); out: return err; out_fail: inode_dec_link_count(inode); inode_dec_link_count(inode); iput(inode); out_dir: inode_dec_link_count(dir); goto out; }