#include <linux/fs.h>
#include <linux/nls.h>
+#include <linux/ctype.h>
+#include <linux/posix_acl.h>
#include "debug.h"
#include "ntfs.h"
ni_lock_dir(dir_ni);
ni_lock(ni);
+ if (dir_ni != new_dir_ni)
+ ni_lock_dir2(new_dir_ni);
is_bad = false;
err = ni_rename(dir_ni, new_dir_ni, ni, de, new_de, &is_bad);
ntfs_sync_inode(inode);
}
+ if (dir_ni != new_dir_ni)
+ ni_unlock(new_dir_ni);
ni_unlock(ni);
ni_unlock(dir_ni);
out:
return err;
}
+/*
+ * ntfs_atomic_open
+ *
+ * inode_operations::atomic_open
+ */
+static int ntfs_atomic_open(struct inode *dir, struct dentry *dentry,
+ struct file *file, u32 flags, umode_t mode)
+{
+ int err;
+ struct inode *inode;
+ struct ntfs_fnd *fnd = NULL;
+ struct ntfs_inode *ni = ntfs_i(dir);
+ struct dentry *d = NULL;
+ struct cpu_str *uni = __getname();
+ bool locked = false;
+
+ if (!uni)
+ return -ENOMEM;
+
+ err = ntfs_nls_to_utf16(ni->mi.sbi, dentry->d_name.name,
+ dentry->d_name.len, uni, NTFS_NAME_LEN,
+ UTF16_HOST_ENDIAN);
+ if (err < 0)
+ goto out;
+
+#ifdef CONFIG_NTFS3_FS_POSIX_ACL
+ if (IS_POSIXACL(dir)) {
+ /*
+ * Load in cache current acl to avoid ni_lock(dir):
+ * ntfs_create_inode -> ntfs_init_acl -> posix_acl_create ->
+ * ntfs_get_acl -> ntfs_get_acl_ex -> ni_lock
+ */
+ struct posix_acl *p = get_inode_acl(dir, ACL_TYPE_DEFAULT);
+
+ if (IS_ERR(p)) {
+ err = PTR_ERR(p);
+ goto out;
+ }
+ posix_acl_release(p);
+ }
+#endif
+
+ if (d_in_lookup(dentry)) {
+ ni_lock_dir(ni);
+ locked = true;
+ fnd = fnd_get();
+ if (!fnd) {
+ err = -ENOMEM;
+ goto out1;
+ }
+
+ d = d_splice_alias(dir_search_u(dir, uni, fnd), dentry);
+ if (IS_ERR(d)) {
+ err = PTR_ERR(d);
+ d = NULL;
+ goto out2;
+ }
+
+ if (d)
+ dentry = d;
+ }
+
+ if (!(flags & O_CREAT) || d_really_is_positive(dentry)) {
+ err = finish_no_open(file, d);
+ goto out2;
+ }
+
+ file->f_mode |= FMODE_CREATED;
+
+ /*
+ * fnd contains tree's path to insert to.
+ * If fnd is not NULL then dir is locked.
+ */
+
+ /*
+ * Unfortunately I don't know how to get here correct 'struct nameidata *nd'
+ * or 'struct user_namespace *mnt_userns'.
+ * See atomic_open in fs/namei.c.
+ * This is why xfstest/633 failed.
+ * Looks like ntfs_atomic_open must accept 'struct user_namespace *mnt_userns' as argument.
+ */
+
+ inode = ntfs_create_inode(&init_user_ns, dir, dentry, uni, mode, 0,
+ NULL, 0, fnd);
+ err = IS_ERR(inode) ? PTR_ERR(inode)
+ : finish_open(file, dentry, ntfs_file_open);
+ dput(d);
+
+out2:
+ fnd_put(fnd);
+out1:
+ if (locked)
+ ni_unlock(ni);
+out:
+ __putname(uni);
+ return err;
+}
+
struct dentry *ntfs3_get_parent(struct dentry *child)
{
struct inode *inode = d_inode(child);
return ERR_PTR(-ENOENT);
}
+/*
+ * dentry_operations::d_hash
+ */
+static int ntfs_d_hash(const struct dentry *dentry, struct qstr *name)
+{
+ struct ntfs_sb_info *sbi;
+ const char *n = name->name;
+ unsigned int len = name->len;
+ unsigned long hash;
+ struct cpu_str *uni;
+ unsigned int c;
+ int err;
+
+ /* First try fast implementation. */
+ hash = init_name_hash(dentry);
+
+ for (;;) {
+ if (!len--) {
+ name->hash = end_name_hash(hash);
+ return 0;
+ }
+
+ c = *n++;
+ if (c >= 0x80)
+ break;
+
+ hash = partial_name_hash(toupper(c), hash);
+ }
+
+ /*
+ * Try slow way with current upcase table
+ */
+ uni = __getname();
+ if (!uni)
+ return -ENOMEM;
+
+ sbi = dentry->d_sb->s_fs_info;
+
+ err = ntfs_nls_to_utf16(sbi, name->name, name->len, uni, NTFS_NAME_LEN,
+ UTF16_HOST_ENDIAN);
+ if (err < 0)
+ goto out;
+
+ if (!err) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ hash = ntfs_names_hash(uni->name, uni->len, sbi->upcase,
+ init_name_hash(dentry));
+ name->hash = end_name_hash(hash);
+ err = 0;
+
+out:
+ __putname(uni);
+ return err;
+}
+
+/*
+ * dentry_operations::d_compare
+ */
+static int ntfs_d_compare(const struct dentry *dentry, unsigned int len1,
+ const char *str, const struct qstr *name)
+{
+ struct ntfs_sb_info *sbi;
+ int ret;
+ const char *n1 = str;
+ const char *n2 = name->name;
+ unsigned int len2 = name->len;
+ unsigned int lm = min(len1, len2);
+ unsigned char c1, c2;
+ struct cpu_str *uni1;
+ struct le_str *uni2;
+
+ /* First try fast implementation. */
+ for (;;) {
+ if (!lm--)
+ return len1 != len2;
+
+ if ((c1 = *n1++) == (c2 = *n2++))
+ continue;
+
+ if (c1 >= 0x80 || c2 >= 0x80)
+ break;
+
+ if (toupper(c1) != toupper(c2))
+ return 1;
+ }
+
+ /*
+ * Try slow way with current upcase table
+ */
+ sbi = dentry->d_sb->s_fs_info;
+ uni1 = __getname();
+ if (!uni1)
+ return -ENOMEM;
+
+ ret = ntfs_nls_to_utf16(sbi, str, len1, uni1, NTFS_NAME_LEN,
+ UTF16_HOST_ENDIAN);
+ if (ret < 0)
+ goto out;
+
+ if (!ret) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ uni2 = Add2Ptr(uni1, 2048);
+
+ ret = ntfs_nls_to_utf16(sbi, name->name, name->len,
+ (struct cpu_str *)uni2, NTFS_NAME_LEN,
+ UTF16_LITTLE_ENDIAN);
+ if (ret < 0)
+ goto out;
+
+ if (!ret) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = !ntfs_cmp_names_cpu(uni1, uni2, sbi->upcase, false) ? 0 : 1;
+
+out:
+ __putname(uni1);
+ return ret;
+}
+
// clang-format off
const struct inode_operations ntfs_dir_inode_operations = {
.lookup = ntfs_lookup,
.setattr = ntfs3_setattr,
.getattr = ntfs_getattr,
.listxattr = ntfs_listxattr,
+ .atomic_open = ntfs_atomic_open,
.fiemap = ntfs_fiemap,
};
.get_inode_acl = ntfs_get_acl,
.set_acl = ntfs_set_acl,
};
+
+const struct dentry_operations ntfs_dentry_ops = {
+ .d_hash = ntfs_d_hash,
+ .d_compare = ntfs_d_compare,
+};
+
// clang-format on
projects / mirror_ubuntu-kernels.git / blobdiff