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/*
* linux/fs/hpfs/inode.c
*
* Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
*
* inode VFS functions
*/
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include "hpfs_fn.h"
static struct file_operations hpfs_file_ops =
{
llseek: generic_file_llseek,
read: generic_file_read,
write: hpfs_file_write,
mmap: generic_file_mmap,
open: hpfs_open,
release: hpfs_file_release,
fsync: hpfs_file_fsync,
};
static struct inode_operations hpfs_file_iops =
{
truncate: hpfs_truncate,
setattr: hpfs_notify_change,
};
static struct file_operations hpfs_dir_ops =
{
llseek: hpfs_dir_lseek,
read: generic_read_dir,
readdir: hpfs_readdir,
open: hpfs_open,
release: hpfs_dir_release,
fsync: hpfs_file_fsync,
};
static struct inode_operations hpfs_dir_iops =
{
create: hpfs_create,
lookup: hpfs_lookup,
unlink: hpfs_unlink,
symlink: hpfs_symlink,
mkdir: hpfs_mkdir,
rmdir: hpfs_rmdir,
mknod: hpfs_mknod,
rename: hpfs_rename,
setattr: hpfs_notify_change,
};
struct address_space_operations hpfs_symlink_aops = {
readpage: hpfs_symlink_readpage
};
void hpfs_read_inode(struct inode *i)
{
struct buffer_head *bh;
struct fnode *fnode;
struct super_block *sb = i->i_sb;
unsigned char *ea;
int ea_size;
init_MUTEX(&i->i_hpfs_sem);
i->i_uid = sb->s_hpfs_uid;
i->i_gid = sb->s_hpfs_gid;
i->i_mode = sb->s_hpfs_mode;
i->i_hpfs_conv = sb->s_hpfs_conv;
i->i_blksize = 512;
i->i_size = -1;
i->i_blocks = -1;
i->i_hpfs_dno = 0;
i->i_hpfs_n_secs = 0;
i->i_hpfs_file_sec = 0;
i->i_hpfs_disk_sec = 0;
i->i_hpfs_dpos = 0;
i->i_hpfs_dsubdno = 0;
i->i_hpfs_ea_mode = 0;
i->i_hpfs_ea_uid = 0;
i->i_hpfs_ea_gid = 0;
i->i_hpfs_ea_size = 0;
i->i_version = ++event;
i->i_hpfs_rddir_off = NULL;
i->i_hpfs_dirty = 0;
i->i_atime = 0;
i->i_mtime = 0;
i->i_ctime = 0;
if (!i->i_sb->s_hpfs_rd_inode)
hpfs_error(i->i_sb, "read_inode: s_hpfs_rd_inode == 0");
if (i->i_sb->s_hpfs_rd_inode == 2) {
i->i_mode |= S_IFREG;
i->i_mode &= ~0111;
i->i_op = &hpfs_file_iops;
i->i_fop = &hpfs_file_ops;
i->i_nlink = 1;
return;
}
if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
/*i->i_mode |= S_IFREG;
i->i_mode &= ~0111;
i->i_op = &hpfs_file_iops;
i->i_fop = &hpfs_file_ops;
i->i_nlink = 0;*/
make_bad_inode(i);
return;
}
if (i->i_sb->s_hpfs_eas) {
if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
if (ea_size == 2) {
i->i_uid = ea[0] + (ea[1] << 8);
i->i_hpfs_ea_uid = 1;
}
kfree(ea);
}
if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
if (ea_size == 2) {
i->i_gid = ea[0] + (ea[1] << 8);
i->i_hpfs_ea_gid = 1;
}
kfree(ea);
}
if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) {
kfree(ea);
i->i_mode = S_IFLNK | 0777;
i->i_op = &page_symlink_inode_operations;
i->i_data.a_ops = &hpfs_symlink_aops;
i->i_nlink = 1;
i->i_size = ea_size;
i->i_blocks = 1;
brelse(bh);
return;
}
if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) {
int rdev = 0;
umode_t mode = sb->s_hpfs_mode;
if (ea_size == 2) {
mode = ea[0] + (ea[1] << 8);
i->i_hpfs_ea_mode = 1;
}
kfree(ea);
i->i_mode = mode;
if (S_ISBLK(mode) || S_ISCHR(mode)) {
if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) {
if (ea_size == 4)
rdev = ea[0] + (ea[1] << 8) + (ea[2] << 16) + (ea[3] << 24);
kfree(ea);
}
}
if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
brelse(bh);
i->i_nlink = 1;
i->i_size = 0;
i->i_blocks = 1;
init_special_inode(i, mode, rdev);
return;
}
}
}
if (fnode->dirflag) {
unsigned n_dnodes, n_subdirs;
i->i_mode |= S_IFDIR;
i->i_op = &hpfs_dir_iops;
i->i_fop = &hpfs_dir_ops;
i->i_hpfs_parent_dir = fnode->up;
i->i_hpfs_dno = fnode->u.external[0].disk_secno;
if (sb->s_hpfs_chk >= 2) {
struct buffer_head *bh0;
if (hpfs_map_fnode(sb, i->i_hpfs_parent_dir, &bh0)) brelse(bh0);
}
n_dnodes = 0; n_subdirs = 0;
hpfs_count_dnodes(i->i_sb, i->i_hpfs_dno, &n_dnodes, &n_subdirs, NULL);
i->i_blocks = 4 * n_dnodes;
i->i_size = 2048 * n_dnodes;
i->i_nlink = 2 + n_subdirs;
} else {
i->i_mode |= S_IFREG;
if (!i->i_hpfs_ea_mode) i->i_mode &= ~0111;
i->i_op = &hpfs_file_iops;
i->i_fop = &hpfs_file_ops;
i->i_nlink = 1;
i->i_size = fnode->file_size;
i->i_blocks = ((i->i_size + 511) >> 9) + 1;
i->i_data.a_ops = &hpfs_aops;
i->u.hpfs_i.mmu_private = i->i_size;
}
brelse(bh);
}
void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode)
{
if (fnode->acl_size_l || fnode->acl_size_s) {
/* Some unknown structures like ACL may be in fnode,
we'd better not overwrite them */
hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 stuctures", i->i_ino);
} else if (i->i_sb->s_hpfs_eas >= 2) {
unsigned char ea[4];
if ((i->i_uid != i->i_sb->s_hpfs_uid) || i->i_hpfs_ea_uid) {
ea[0] = i->i_uid & 0xff;
ea[1] = i->i_uid >> 8;
hpfs_set_ea(i, fnode, "UID", ea, 2);
i->i_hpfs_ea_uid = 1;
}
if ((i->i_gid != i->i_sb->s_hpfs_gid) || i->i_hpfs_ea_gid) {
ea[0] = i->i_gid & 0xff;
ea[1] = i->i_gid >> 8;
hpfs_set_ea(i, fnode, "GID", ea, 2);
i->i_hpfs_ea_gid = 1;
}
if (!S_ISLNK(i->i_mode))
if ((i->i_mode != ((i->i_sb->s_hpfs_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111))
| (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))
&& i->i_mode != ((i->i_sb->s_hpfs_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333))
| (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || i->i_hpfs_ea_mode) {
ea[0] = i->i_mode & 0xff;
ea[1] = i->i_mode >> 8;
hpfs_set_ea(i, fnode, "MODE", ea, 2);
i->i_hpfs_ea_mode = 1;
}
if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) {
int d = kdev_t_to_nr(i->i_rdev);
ea[0] = d & 0xff;
ea[1] = (d >> 8) & 0xff;
ea[2] = (d >> 16) & 0xff;
ea[3] = d >> 24;
hpfs_set_ea(i, fnode, "DEV", ea, 4);
}
}
}
void hpfs_write_inode(struct inode *i)
{
struct inode *parent;
if (!i->i_nlink) return;
if (i->i_ino == i->i_sb->s_hpfs_root) return;
if (i->i_hpfs_rddir_off && !atomic_read(&i->i_count)) {
if (*i->i_hpfs_rddir_off) printk("HPFS: write_inode: some position still there\n");
kfree(i->i_hpfs_rddir_off);
i->i_hpfs_rddir_off = NULL;
}
i->i_hpfs_dirty = 0;
hpfs_lock_iget(i->i_sb, 1);
parent = iget(i->i_sb, i->i_hpfs_parent_dir);
hpfs_unlock_iget(i->i_sb);
hpfs_lock_inode(parent);
hpfs_write_inode_nolock(i);
hpfs_unlock_inode(parent);
iput(parent);
}
void hpfs_write_inode_nolock(struct inode *i)
{
struct buffer_head *bh;
struct fnode *fnode;
struct quad_buffer_head qbh;
struct hpfs_dirent *de;
if (i->i_ino == i->i_sb->s_hpfs_root) return;
if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
if (i->i_ino != i->i_sb->s_hpfs_root) {
if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) {
brelse(bh);
return;
}
} else de = NULL;
if (S_ISREG(i->i_mode)) {
fnode->file_size = de->file_size = i->i_size;
} else if (S_ISDIR(i->i_mode)) {
fnode->file_size = de->file_size = 0;
}
hpfs_write_inode_ea(i, fnode);
if (de) {
de->write_date = gmt_to_local(i->i_sb, i->i_mtime);
de->read_date = gmt_to_local(i->i_sb, i->i_atime);
de->creation_date = gmt_to_local(i->i_sb, i->i_ctime);
de->read_only = !(i->i_mode & 0222);
de->ea_size = i->i_hpfs_ea_size;
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
}
if (S_ISDIR(i->i_mode)) {
if ((de = map_dirent(i, i->i_hpfs_dno, "\001\001", 2, NULL, &qbh))) {
de->write_date = gmt_to_local(i->i_sb, i->i_mtime);
de->read_date = gmt_to_local(i->i_sb, i->i_atime);
de->creation_date = gmt_to_local(i->i_sb, i->i_ctime);
de->read_only = !(i->i_mode & 0222);
de->ea_size = /*i->i_hpfs_ea_size*/0;
de->file_size = 0;
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
} else hpfs_error(i->i_sb, "directory %08x doesn't have '.' entry", i->i_ino);
}
mark_buffer_dirty(bh);
brelse(bh);
}
int hpfs_notify_change(struct dentry *dentry, struct iattr *attr)
{
struct inode *inode = dentry->d_inode;
int error;
if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
return -EINVAL;
if (inode->i_sb->s_hpfs_root == inode->i_ino) return -EINVAL;
if ((error = inode_change_ok(inode, attr))) return error;
error = inode_setattr(inode, attr);
if (error) return error;
hpfs_write_inode(inode);
return 0;
}
void hpfs_write_if_changed(struct inode *inode)
{
if (inode->i_hpfs_dirty) {
hpfs_write_inode(inode);
}
}
void hpfs_delete_inode(struct inode *inode)
{
lock_kernel();
hpfs_remove_fnode(inode->i_sb, inode->i_ino);
unlock_kernel();
clear_inode(inode);
}
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