--- /dev/null
+/*
+ * linux/fs/hpfs/inode.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * inode VFS functions
+ */
+
+#include <linux/slab.h>
+#include <linux/user_namespace.h>
+#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;
+ 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);
+ void *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;
+ clear_nlink(i);*/
+ 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_uid_write(i, le16_to_cpu(*(__le16*)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_gid_write(i, le16_to_cpu(*(__le16*)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;
+ set_nlink(i, 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(*(__le16*)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(*(__le32*)ea);
+ kfree(ea);
+ }
+ }
+ if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
+ brelse(bh);
+ set_nlink(i, 1);
+ i->i_size = 0;
+ i->i_blocks = 1;
+ init_special_inode(i, mode,
+ new_decode_dev(rdev));
+ return;
+ }
+ }
+ }
+ if (fnode_is_dir(fnode)) {
+ int 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 = le32_to_cpu(fnode->up);
+ hpfs_inode->i_dno = le32_to_cpu(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;
+ set_nlink(i, 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;
+ set_nlink(i, 1);
+ i->i_size = le32_to_cpu(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 (le32_to_cpu(fnode->acl_size_l) || le16_to_cpu(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 structures", i->i_ino);
+ } else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) {
+ __le32 ea;
+ if (!uid_eq(i->i_uid, hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) {
+ ea = cpu_to_le32(i_uid_read(i));
+ hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2);
+ hpfs_inode->i_ea_uid = 1;
+ }
+ if (!gid_eq(i->i_gid, hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) {
+ ea = cpu_to_le32(i_gid_read(i));
+ 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);
+ /* sick, but legal */
+ 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)
+ pr_err("write_inode: some position still there\n");
+ kfree(hpfs_inode->i_rddir_off);
+ hpfs_inode->i_rddir_off = NULL;
+ }
+ if (!i->i_nlink) {
+ 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);
+ }
+ hpfs_write_inode_nolock(i);
+ iput(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 = cpu_to_le32(i->i_size);
+ if (de) de->file_size = cpu_to_le32(i->i_size);
+ } else if (S_ISDIR(i->i_mode)) {
+ fnode->file_size = cpu_to_le32(0);
+ if (de) de->file_size = cpu_to_le32(0);
+ }
+ hpfs_write_inode_ea(i, fnode);
+ if (de) {
+ de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
+ de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
+ de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
+ de->read_only = !(i->i_mode & 0222);
+ de->ea_size = cpu_to_le32(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 = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
+ de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
+ de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
+ de->read_only = !(i->i_mode & 0222);
+ de->ea_size = cpu_to_le32(/*hpfs_inode->i_ea_size*/0);
+ de->file_size = cpu_to_le32(0);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ } else
+ hpfs_error(i->i_sb,
+ "directory %08lx doesn't have '.' entry",
+ (unsigned long)i->i_ino);
+ }
+ mark_buffer_dirty(bh);
+ brelse(bh);
+}
+
+int hpfs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = d_inode(dentry);
+ int error = -EINVAL;
+
+ hpfs_lock(inode->i_sb);
+ if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root)
+ goto out_unlock;
+ if ((attr->ia_valid & ATTR_UID) &&
+ from_kuid(&init_user_ns, attr->ia_uid) >= 0x10000)
+ goto out_unlock;
+ if ((attr->ia_valid & ATTR_GID) &&
+ from_kgid(&init_user_ns, attr->ia_gid) >= 0x10000)
+ goto out_unlock;
+ if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
+ goto out_unlock;
+
+ error = inode_change_ok(inode, attr);
+ if (error)
+ goto out_unlock;
+
+ if ((attr->ia_valid & ATTR_SIZE) &&
+ attr->ia_size != i_size_read(inode)) {
+ error = inode_newsize_ok(inode, attr->ia_size);
+ if (error)
+ goto out_unlock;
+
+ truncate_setsize(inode, attr->ia_size);
+ hpfs_truncate(inode);
+ }
+
+ setattr_copy(inode, attr);
+
+ hpfs_write_inode(inode);
+
+ out_unlock:
+ hpfs_unlock(inode->i_sb);
+ 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_evict_inode(struct inode *inode)
+{
+ truncate_inode_pages_final(&inode->i_data);
+ clear_inode(inode);
+ if (!inode->i_nlink) {
+ hpfs_lock(inode->i_sb);
+ hpfs_remove_fnode(inode->i_sb, inode->i_ino);
+ hpfs_unlock(inode->i_sb);
+ }
+}
Code Review / kvmfornfv.git / blobdiff