1 files changed, 291 insertions, 0 deletions

diff --git a/fs/hpfs/inode.c b/fs/hpfs/inode.c
new file mode 100644
index 000000000000..38b1741fa539
--- /dev/null
+++ b/fs/hpfs/inode.c
@@ -0,0 +1,291 @@
+/*
+ *  linux/fs/hpfs/inode.c
+ *
+ *  Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ *  inode VFS functions
+ */
+
+#include "hpfs_fn.h"
+
+void hpfs_init_inode(struct inode *i)
+{
+        struct super_block *sb = i->i_sb;
+        struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+
+        i->i_uid = hpfs_sb(sb)->sb_uid;
+        i->i_gid = hpfs_sb(sb)->sb_gid;
+        i->i_mode = hpfs_sb(sb)->sb_mode;
+        hpfs_inode->i_conv = hpfs_sb(sb)->sb_conv;
+        i->i_blksize = 512;
+        i->i_size = -1;
+        i->i_blocks = -1;
+        
+        hpfs_inode->i_dno = 0;
+        hpfs_inode->i_n_secs = 0;
+        hpfs_inode->i_file_sec = 0;
+        hpfs_inode->i_disk_sec = 0;
+        hpfs_inode->i_dpos = 0;
+        hpfs_inode->i_dsubdno = 0;
+        hpfs_inode->i_ea_mode = 0;
+        hpfs_inode->i_ea_uid = 0;
+        hpfs_inode->i_ea_gid = 0;
+        hpfs_inode->i_ea_size = 0;
+
+        hpfs_inode->i_rddir_off = NULL;
+        hpfs_inode->i_dirty = 0;
+
+        i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0;
+        i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0;
+        i->i_atime.tv_sec = i->i_atime.tv_nsec = 0;
+}
+
+void hpfs_read_inode(struct inode *i)
+{
+        struct buffer_head *bh;
+        struct fnode *fnode;
+        struct super_block *sb = i->i_sb;
+        struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+        unsigned char *ea;
+        int ea_size;
+
+        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 (hpfs_sb(i->i_sb)->sb_eas) {
+                if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
+                        if (ea_size == 2) {
+                                i->i_uid = le16_to_cpu(*(u16*)ea);
+                                hpfs_inode->i_ea_uid = 1;
+                        }
+                        kfree(ea);
+                }
+                if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
+                        if (ea_size == 2) {
+                                i->i_gid = le16_to_cpu(*(u16*)ea);
+                                hpfs_inode->i_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 = hpfs_sb(sb)->sb_mode;
+                        if (ea_size == 2) {
+                                mode = le16_to_cpu(*(u16*)ea);
+                                hpfs_inode->i_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 = le32_to_cpu(*(u32*)ea);
+                                        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,
+                                        new_decode_dev(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;
+                hpfs_inode->i_parent_dir = fnode->up;
+                hpfs_inode->i_dno = fnode->u.external[0].disk_secno;
+                if (hpfs_sb(sb)->sb_chk >= 2) {
+                        struct buffer_head *bh0;
+                        if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0);
+                }
+                n_dnodes = 0; n_subdirs = 0;
+                hpfs_count_dnodes(i->i_sb, hpfs_inode->i_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 (!hpfs_inode->i_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;
+                hpfs_i(i)->mmu_private = i->i_size;
+        }
+        brelse(bh);
+}
+
+static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode)
+{
+        struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+        /*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 (hpfs_sb(i->i_sb)->sb_eas >= 2) {
+                u32 ea;
+                if ((i->i_uid != hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) {
+                        ea = cpu_to_le32(i->i_uid);
+                        hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2);
+                        hpfs_inode->i_ea_uid = 1;
+                }
+                if ((i->i_gid != hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) {
+                        ea = cpu_to_le32(i->i_gid);
+                        hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2);
+                        hpfs_inode->i_ea_gid = 1;
+                }
+                if (!S_ISLNK(i->i_mode))
+                        if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111))
+                          | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))
+                          && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333))
+                          | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) {
+                                ea = cpu_to_le32(i->i_mode);
+                                hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2);
+                                hpfs_inode->i_ea_mode = 1;
+                        }
+                if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) {
+                        ea = cpu_to_le32(new_encode_dev(i->i_rdev));
+                        hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4);
+                }
+        }
+}
+
+void hpfs_write_inode(struct inode *i)
+{
+        struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+        struct inode *parent;
+        if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
+        if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) {
+                if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n");
+                kfree(hpfs_inode->i_rddir_off);
+                hpfs_inode->i_rddir_off = NULL;
+        }
+        down(&hpfs_inode->i_parent);
+        if (!i->i_nlink) {
+                up(&hpfs_inode->i_parent);
+                return;
+        }
+        parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir);
+        if (parent) {
+                hpfs_inode->i_dirty = 0;
+                if (parent->i_state & I_NEW) {
+                        hpfs_init_inode(parent);
+                        hpfs_read_inode(parent);
+                        unlock_new_inode(parent);
+                }
+                down(&hpfs_inode->i_sem);
+                hpfs_write_inode_nolock(i);
+                up(&hpfs_inode->i_sem);
+                iput(parent);
+        } else {
+                mark_inode_dirty(i);
+        }
+        up(&hpfs_inode->i_parent);
+}
+
+void hpfs_write_inode_nolock(struct inode *i)
+{
+        struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+        struct buffer_head *bh;
+        struct fnode *fnode;
+        struct quad_buffer_head qbh;
+        struct hpfs_dirent *de;
+        if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
+        if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
+        if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) {
+                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 = i->i_size;
+                if (de) de->file_size = i->i_size;
+        } else if (S_ISDIR(i->i_mode)) {
+                fnode->file_size = 0;
+                if (de) de->file_size = 0;
+        }
+        hpfs_write_inode_ea(i, fnode);
+        if (de) {
+                de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec);
+                de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec);
+                de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec);
+                de->read_only = !(i->i_mode & 0222);
+                de->ea_size = hpfs_inode->i_ea_size;
+                hpfs_mark_4buffers_dirty(&qbh);
+                hpfs_brelse4(&qbh);
+        }
+        if (S_ISDIR(i->i_mode)) {
+                if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) {
+                        de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec);
+                        de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec);
+                        de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec);
+                        de->read_only = !(i->i_mode & 0222);
+                        de->ea_size = /*hpfs_inode->i_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=0;
+        lock_kernel();
+        if ( ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) ||
+             (hpfs_sb(inode->i_sb)->sb_root == inode->i_ino) ) {
+                error = -EINVAL;
+        } else if ((error = inode_change_ok(inode, attr))) {
+        } else if ((error = inode_setattr(inode, attr))) {
+        } else {
+                hpfs_write_inode(inode);
+        }
+        unlock_kernel();
+        return error;
+}
+
+void hpfs_write_if_changed(struct inode *inode)
+{
+        struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+
+        if (hpfs_inode->i_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);
+}