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;
}