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)
{
int error;
struct inode * inode;
struct buffer_head * bh;
struct sysv_dir_entry * de;
bh = sysv_find_entry(dir, dentry->d_name.name,
dentry->d_name.len, &de);
if (bh) {
brelse(bh);
return -EEXIST;
}
inode = sysv_new_inode(dir);
if (!inode)
return -ENOSPC;
inode->i_uid = current->fsuid;
init_special_inode(inode, mode, rdev);
mark_inode_dirty(inode);
error = sysv_add_entry(dir, dentry->d_name.name,
dentry->d_name.len, &bh, &de);
if (error) {
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
return error;
}
de->inode = inode->i_ino;
mark_buffer_dirty(bh);
brelse(bh);
d_instantiate(dentry, inode);
return 0;
}
static int sysv_create(struct inode * dir, struct dentry * dentry, int mode)
{
int error;
struct inode * inode;
struct buffer_head * bh;
struct sysv_dir_entry * de;
inode = sysv_new_inode(dir);
if (!inode)
return -ENOSPC;
inode->i_op = &sysv_file_inode_operations;
inode->i_fop = &sysv_file_operations;
inode->i_mapping->a_ops = &sysv_aops;
inode->i_mode = mode;
mark_inode_dirty(inode);
error = sysv_add_entry(dir, dentry->d_name.name,
dentry->d_name.len, &bh, &de);
if (error) {
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
return error;
}
de->inode = inode->i_ino;
mark_buffer_dirty(bh);
brelse(bh);
d_instantiate(dentry, inode);
return 0;
}
int sysv_symlink(struct inode * dir, struct dentry * dentry,
const char * symname)
{
struct sysv_dir_entry * de;
struct inode * inode;
struct buffer_head * name_block;
char * name_block_data;
struct super_block * sb;
int i;
char c;
struct buffer_head * bh;
if (!(inode = sysv_new_inode(dir)))
return -ENOSPC;
inode->i_mode = S_IFLNK | 0777;
inode->i_op = &sysv_symlink_inode_operations;
name_block = sysv_file_bread(inode, 0, 1);
if (!name_block) {
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
return -ENOSPC;
}
sb = inode->i_sb;
name_block_data = name_block->b_data;
i = 0;
while (i < sb->sv_block_size_1 && (c = *(symname++)))
name_block_data[i++] = c;
name_block_data[i] = 0;
mark_buffer_dirty(name_block, 1);
brelse(name_block);
inode->i_size = i;
mark_inode_dirty(inode);
bh = sysv_find_entry(dir, dentry->d_name.name,
dentry->d_name.len, &de);
if (bh) {
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
brelse(bh);
return -EEXIST;
}
i = sysv_add_entry(dir, dentry->d_name.name,
dentry->d_name.len, &bh, &de);
if (i) {
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
return i;
}
de->inode = inode->i_ino;
mark_buffer_dirty(bh, 1);
brelse(bh);
d_instantiate(dentry, inode);
return 0;
}
int sysv_mkdir(struct inode * dir, struct dentry *dentry, int mode)
{
int error;
struct inode * inode;
struct buffer_head * bh, *dir_block;
struct sysv_dir_entry * de;
if (!dir)
return -EINVAL;
bh = sysv_find_entry(dir, dentry->d_name.name,
dentry->d_name.len, &de);
if (bh) {
brelse(bh);
return -EEXIST;
}
if (dir->i_nlink >= dir->i_sb->sv_link_max)
return -EMLINK;
inode = sysv_new_inode(dir);
if (!inode)
return -ENOSPC;
inode->i_op = &sysv_dir_inode_operations;
inode->i_size = 2 * SYSV_DIRSIZE;
dir_block = sysv_file_bread(inode,0,1);
if (!dir_block) {
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
return -ENOSPC;
}
de = (struct sysv_dir_entry *) (dir_block->b_data + 0*SYSV_DIRSIZE);
de->inode = inode->i_ino;
strcpy(de->name,"."); /* rest of de->name is zero, see sysv_new_block */
de = (struct sysv_dir_entry *) (dir_block->b_data + 1*SYSV_DIRSIZE);
de->inode = dir->i_ino;
strcpy(de->name,".."); /* rest of de->name is zero, see sysv_new_block */
inode->i_nlink = 2;
mark_buffer_dirty(dir_block, 1);
brelse(dir_block);
inode->i_mode = S_IFDIR | (mode & 0777 & ~current->fs->umask);
if (dir->i_mode & S_ISGID)
inode->i_mode |= S_ISGID;
mark_inode_dirty(inode);
error = sysv_add_entry(dir, dentry->d_name.name,
dentry->d_name.len, &bh, &de);
if (error) {
inode->i_nlink=0;
iput(inode);
return error;
}
de->inode = inode->i_ino;
mark_buffer_dirty(bh, 1);
dir->i_nlink++;
mark_inode_dirty(dir);
brelse(bh);
d_instantiate(dentry, inode);
return 0;
}
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;
}
int sysv_mknod(struct inode * dir, struct dentry * dentry, int mode, int rdev)
{
int error;
struct inode * inode;
struct buffer_head * bh;
struct sysv_dir_entry * de;
if (!dir)
return -ENOENT;
bh = sysv_find_entry(dir, dentry->d_name.name,
dentry->d_name.len, &de);
if (bh) {
brelse(bh);
return -EEXIST;
}
inode = sysv_new_inode(dir);
if (!inode)
return -ENOSPC;
inode->i_uid = current->fsuid;
inode->i_mode = mode;
inode->i_op = NULL;
if (S_ISREG(inode->i_mode))
inode->i_op = &sysv_file_inode_operations;
else if (S_ISCHR(inode->i_mode))
inode->i_op = &chrdev_inode_operations;
else if (S_ISBLK(inode->i_mode))
inode->i_op = &blkdev_inode_operations;
else if (S_ISFIFO(inode->i_mode))
init_fifo(inode);
if (S_ISBLK(mode) || S_ISCHR(mode))
inode->i_rdev = to_kdev_t(rdev);
mark_inode_dirty(inode);
error = sysv_add_entry(dir, dentry->d_name.name,
dentry->d_name.len, &bh, &de);
if (error) {
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
return error;
}
de->inode = inode->i_ino;
mark_buffer_dirty(bh, 1);
brelse(bh);
d_instantiate(dentry, inode);
return 0;
}
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 int sysv_symlink(struct inode * dir, struct dentry * dentry,
const char * symname)
{
struct inode * inode;
struct sysv_dir_entry * de;
struct buffer_head * bh;
int err;
int l;
err = -ENAMETOOLONG;
l = strlen(symname)+1;
if (l > dir->i_sb->sv_block_size_1)
goto out;
err = -ENOSPC;
if (!(inode = sysv_new_inode(dir)))
goto out;
inode->i_mode = S_IFLNK | 0777;
inode->i_op = &sysv_symlink_inode_operations;
inode->i_mapping->a_ops = &sysv_aops;
err = block_symlink(inode, symname, l);
if (err)
goto out_no_entry;
mark_inode_dirty(inode);
err = sysv_add_entry(dir, dentry->d_name.name,
dentry->d_name.len, &bh, &de);
if (err)
goto out_no_entry;
de->inode = inode->i_ino;
mark_buffer_dirty(bh);
brelse(bh);
d_instantiate(dentry, inode);
out:
return err;
out_no_entry:
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
goto out;
}
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;
}
