From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- fs/ntfs3/xattr.c | 1028 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1028 insertions(+) create mode 100644 fs/ntfs3/xattr.c (limited to 'fs/ntfs3/xattr.c') diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c new file mode 100644 index 0000000000..4920548192 --- /dev/null +++ b/fs/ntfs3/xattr.c @@ -0,0 +1,1028 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * + * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. + * + */ + +#include +#include +#include +#include + +#include "debug.h" +#include "ntfs.h" +#include "ntfs_fs.h" + +// clang-format off +#define SYSTEM_DOS_ATTRIB "system.dos_attrib" +#define SYSTEM_NTFS_ATTRIB "system.ntfs_attrib" +#define SYSTEM_NTFS_ATTRIB_BE "system.ntfs_attrib_be" +#define SYSTEM_NTFS_SECURITY "system.ntfs_security" +// clang-format on + +static inline size_t unpacked_ea_size(const struct EA_FULL *ea) +{ + return ea->size ? le32_to_cpu(ea->size) : + ALIGN(struct_size(ea, name, + 1 + ea->name_len + + le16_to_cpu(ea->elength)), + 4); +} + +static inline size_t packed_ea_size(const struct EA_FULL *ea) +{ + return struct_size(ea, name, + 1 + ea->name_len + le16_to_cpu(ea->elength)) - + offsetof(struct EA_FULL, flags); +} + +/* + * find_ea + * + * Assume there is at least one xattr in the list. + */ +static inline bool find_ea(const struct EA_FULL *ea_all, u32 bytes, + const char *name, u8 name_len, u32 *off, u32 *ea_sz) +{ + u32 ea_size; + + *off = 0; + if (!ea_all) + return false; + + for (; *off < bytes; *off += ea_size) { + const struct EA_FULL *ea = Add2Ptr(ea_all, *off); + ea_size = unpacked_ea_size(ea); + if (ea->name_len == name_len && + !memcmp(ea->name, name, name_len)) { + if (ea_sz) + *ea_sz = ea_size; + return true; + } + } + + return false; +} + +/* + * ntfs_read_ea - Read all extended attributes. + * @ea: New allocated memory. + * @info: Pointer into resident data. + */ +static int ntfs_read_ea(struct ntfs_inode *ni, struct EA_FULL **ea, + size_t add_bytes, const struct EA_INFO **info) +{ + int err = -EINVAL; + struct ntfs_sb_info *sbi = ni->mi.sbi; + struct ATTR_LIST_ENTRY *le = NULL; + struct ATTRIB *attr_info, *attr_ea; + void *ea_p; + u32 size, off, ea_size; + + static_assert(le32_to_cpu(ATTR_EA_INFO) < le32_to_cpu(ATTR_EA)); + + *ea = NULL; + *info = NULL; + + attr_info = + ni_find_attr(ni, NULL, &le, ATTR_EA_INFO, NULL, 0, NULL, NULL); + attr_ea = + ni_find_attr(ni, attr_info, &le, ATTR_EA, NULL, 0, NULL, NULL); + + if (!attr_ea || !attr_info) + return 0; + + *info = resident_data_ex(attr_info, sizeof(struct EA_INFO)); + if (!*info) + goto out; + + /* Check Ea limit. */ + size = le32_to_cpu((*info)->size); + if (size > sbi->ea_max_size) { + err = -EFBIG; + goto out; + } + + if (attr_size(attr_ea) > sbi->ea_max_size) { + err = -EFBIG; + goto out; + } + + if (!size) { + /* EA info persists, but xattr is empty. Looks like EA problem. */ + goto out; + } + + /* Allocate memory for packed Ea. */ + ea_p = kmalloc(size_add(size, add_bytes), GFP_NOFS); + if (!ea_p) + return -ENOMEM; + + if (attr_ea->non_res) { + struct runs_tree run; + + run_init(&run); + + err = attr_load_runs_range(ni, ATTR_EA, NULL, 0, &run, 0, size); + if (!err) + err = ntfs_read_run_nb(sbi, &run, 0, ea_p, size, NULL); + run_close(&run); + + if (err) + goto out1; + } else { + void *p = resident_data_ex(attr_ea, size); + + if (!p) + goto out1; + memcpy(ea_p, p, size); + } + + memset(Add2Ptr(ea_p, size), 0, add_bytes); + + err = -EINVAL; + /* Check all attributes for consistency. */ + for (off = 0; off < size; off += ea_size) { + const struct EA_FULL *ef = Add2Ptr(ea_p, off); + u32 bytes = size - off; + + /* Check if we can use field ea->size. */ + if (bytes < sizeof(ef->size)) + goto out1; + + if (ef->size) { + ea_size = le32_to_cpu(ef->size); + if (ea_size > bytes) + goto out1; + continue; + } + + /* Check if we can use fields ef->name_len and ef->elength. */ + if (bytes < offsetof(struct EA_FULL, name)) + goto out1; + + ea_size = ALIGN(struct_size(ef, name, + 1 + ef->name_len + + le16_to_cpu(ef->elength)), + 4); + if (ea_size > bytes) + goto out1; + } + + *ea = ea_p; + return 0; + +out1: + kfree(ea_p); +out: + ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); + return err; +} + +/* + * ntfs_list_ea + * + * Copy a list of xattrs names into the buffer + * provided, or compute the buffer size required. + * + * Return: + * * Number of bytes used / required on + * * -ERRNO - on failure + */ +static ssize_t ntfs_list_ea(struct ntfs_inode *ni, char *buffer, + size_t bytes_per_buffer) +{ + const struct EA_INFO *info; + struct EA_FULL *ea_all = NULL; + const struct EA_FULL *ea; + u32 off, size; + int err; + int ea_size; + size_t ret; + + err = ntfs_read_ea(ni, &ea_all, 0, &info); + if (err) + return err; + + if (!info || !ea_all) + return 0; + + size = le32_to_cpu(info->size); + + /* Enumerate all xattrs. */ + ret = 0; + for (off = 0; off + sizeof(struct EA_FULL) < size; off += ea_size) { + ea = Add2Ptr(ea_all, off); + ea_size = unpacked_ea_size(ea); + + if (!ea->name_len) + break; + + if (buffer) { + /* Check if we can use field ea->name */ + if (off + ea_size > size) + break; + + if (ret + ea->name_len + 1 > bytes_per_buffer) { + err = -ERANGE; + goto out; + } + + memcpy(buffer + ret, ea->name, ea->name_len); + buffer[ret + ea->name_len] = 0; + } + + ret += ea->name_len + 1; + } + +out: + kfree(ea_all); + return err ? err : ret; +} + +static int ntfs_get_ea(struct inode *inode, const char *name, size_t name_len, + void *buffer, size_t size, size_t *required) +{ + struct ntfs_inode *ni = ntfs_i(inode); + const struct EA_INFO *info; + struct EA_FULL *ea_all = NULL; + const struct EA_FULL *ea; + u32 off, len; + int err; + + if (!(ni->ni_flags & NI_FLAG_EA)) + return -ENODATA; + + if (!required) + ni_lock(ni); + + len = 0; + + if (name_len > 255) { + err = -ENAMETOOLONG; + goto out; + } + + err = ntfs_read_ea(ni, &ea_all, 0, &info); + if (err) + goto out; + + if (!info) + goto out; + + /* Enumerate all xattrs. */ + if (!find_ea(ea_all, le32_to_cpu(info->size), name, name_len, &off, + NULL)) { + err = -ENODATA; + goto out; + } + ea = Add2Ptr(ea_all, off); + + len = le16_to_cpu(ea->elength); + if (!buffer) { + err = 0; + goto out; + } + + if (len > size) { + err = -ERANGE; + if (required) + *required = len; + goto out; + } + + memcpy(buffer, ea->name + ea->name_len + 1, len); + err = 0; + +out: + kfree(ea_all); + if (!required) + ni_unlock(ni); + + return err ? err : len; +} + +static noinline int ntfs_set_ea(struct inode *inode, const char *name, + size_t name_len, const void *value, + size_t val_size, int flags, bool locked, + __le16 *ea_size) +{ + struct ntfs_inode *ni = ntfs_i(inode); + struct ntfs_sb_info *sbi = ni->mi.sbi; + int err; + struct EA_INFO ea_info; + const struct EA_INFO *info; + struct EA_FULL *new_ea; + struct EA_FULL *ea_all = NULL; + size_t add, new_pack; + u32 off, size, ea_sz; + __le16 size_pack; + struct ATTRIB *attr; + struct ATTR_LIST_ENTRY *le; + struct mft_inode *mi; + struct runs_tree ea_run; + u64 new_sz; + void *p; + + if (!locked) + ni_lock(ni); + + run_init(&ea_run); + + if (name_len > 255) { + err = -ENAMETOOLONG; + goto out; + } + + add = ALIGN(struct_size(ea_all, name, 1 + name_len + val_size), 4); + + err = ntfs_read_ea(ni, &ea_all, add, &info); + if (err) + goto out; + + if (!info) { + memset(&ea_info, 0, sizeof(ea_info)); + size = 0; + size_pack = 0; + } else { + memcpy(&ea_info, info, sizeof(ea_info)); + size = le32_to_cpu(ea_info.size); + size_pack = ea_info.size_pack; + } + + if (info && find_ea(ea_all, size, name, name_len, &off, &ea_sz)) { + struct EA_FULL *ea; + + if (flags & XATTR_CREATE) { + err = -EEXIST; + goto out; + } + + ea = Add2Ptr(ea_all, off); + + /* + * Check simple case when we try to insert xattr with the same value + * e.g. ntfs_save_wsl_perm + */ + if (val_size && le16_to_cpu(ea->elength) == val_size && + !memcmp(ea->name + ea->name_len + 1, value, val_size)) { + /* xattr already contains the required value. */ + goto out; + } + + /* Remove current xattr. */ + if (ea->flags & FILE_NEED_EA) + le16_add_cpu(&ea_info.count, -1); + + le16_add_cpu(&ea_info.size_pack, 0 - packed_ea_size(ea)); + + memmove(ea, Add2Ptr(ea, ea_sz), size - off - ea_sz); + + size -= ea_sz; + memset(Add2Ptr(ea_all, size), 0, ea_sz); + + ea_info.size = cpu_to_le32(size); + + if ((flags & XATTR_REPLACE) && !val_size) { + /* Remove xattr. */ + goto update_ea; + } + } else { + if (flags & XATTR_REPLACE) { + err = -ENODATA; + goto out; + } + + if (!ea_all) { + ea_all = kzalloc(add, GFP_NOFS); + if (!ea_all) { + err = -ENOMEM; + goto out; + } + } + } + + /* Append new xattr. */ + new_ea = Add2Ptr(ea_all, size); + new_ea->size = cpu_to_le32(add); + new_ea->flags = 0; + new_ea->name_len = name_len; + new_ea->elength = cpu_to_le16(val_size); + memcpy(new_ea->name, name, name_len); + new_ea->name[name_len] = 0; + memcpy(new_ea->name + name_len + 1, value, val_size); + new_pack = le16_to_cpu(ea_info.size_pack) + packed_ea_size(new_ea); + ea_info.size_pack = cpu_to_le16(new_pack); + /* New size of ATTR_EA. */ + size += add; + ea_info.size = cpu_to_le32(size); + + /* + * 1. Check ea_info.size_pack for overflow. + * 2. New attribute size must fit value from $AttrDef + */ + if (new_pack > 0xffff || size > sbi->ea_max_size) { + ntfs_inode_warn( + inode, + "The size of extended attributes must not exceed 64KiB"); + err = -EFBIG; // -EINVAL? + goto out; + } + +update_ea: + + if (!info) { + /* Create xattr. */ + if (!size) { + err = 0; + goto out; + } + + err = ni_insert_resident(ni, sizeof(struct EA_INFO), + ATTR_EA_INFO, NULL, 0, NULL, NULL, + NULL); + if (err) + goto out; + + err = ni_insert_resident(ni, 0, ATTR_EA, NULL, 0, NULL, NULL, + NULL); + if (err) + goto out; + } + + new_sz = size; + err = attr_set_size(ni, ATTR_EA, NULL, 0, &ea_run, new_sz, &new_sz, + false, NULL); + if (err) + goto out; + + le = NULL; + attr = ni_find_attr(ni, NULL, &le, ATTR_EA_INFO, NULL, 0, NULL, &mi); + if (!attr) { + err = -EINVAL; + goto out; + } + + if (!size) { + /* Delete xattr, ATTR_EA_INFO */ + ni_remove_attr_le(ni, attr, mi, le); + } else { + p = resident_data_ex(attr, sizeof(struct EA_INFO)); + if (!p) { + err = -EINVAL; + goto out; + } + memcpy(p, &ea_info, sizeof(struct EA_INFO)); + mi->dirty = true; + } + + le = NULL; + attr = ni_find_attr(ni, NULL, &le, ATTR_EA, NULL, 0, NULL, &mi); + if (!attr) { + err = -EINVAL; + goto out; + } + + if (!size) { + /* Delete xattr, ATTR_EA */ + ni_remove_attr_le(ni, attr, mi, le); + } else if (attr->non_res) { + err = attr_load_runs_range(ni, ATTR_EA, NULL, 0, &ea_run, 0, + size); + if (err) + goto out; + + err = ntfs_sb_write_run(sbi, &ea_run, 0, ea_all, size, 0); + if (err) + goto out; + } else { + p = resident_data_ex(attr, size); + if (!p) { + err = -EINVAL; + goto out; + } + memcpy(p, ea_all, size); + mi->dirty = true; + } + + /* Check if we delete the last xattr. */ + if (size) + ni->ni_flags |= NI_FLAG_EA; + else + ni->ni_flags &= ~NI_FLAG_EA; + + if (ea_info.size_pack != size_pack) + ni->ni_flags |= NI_FLAG_UPDATE_PARENT; + if (ea_size) + *ea_size = ea_info.size_pack; + mark_inode_dirty(&ni->vfs_inode); + +out: + if (!locked) + ni_unlock(ni); + + run_close(&ea_run); + kfree(ea_all); + + return err; +} + +#ifdef CONFIG_NTFS3_FS_POSIX_ACL + +/* + * ntfs_get_acl - inode_operations::get_acl + */ +struct posix_acl *ntfs_get_acl(struct mnt_idmap *idmap, struct dentry *dentry, + int type) +{ + struct inode *inode = d_inode(dentry); + struct ntfs_inode *ni = ntfs_i(inode); + const char *name; + size_t name_len; + struct posix_acl *acl; + size_t req; + int err; + void *buf; + + /* Allocate PATH_MAX bytes. */ + buf = __getname(); + if (!buf) + return ERR_PTR(-ENOMEM); + + /* Possible values of 'type' was already checked above. */ + if (type == ACL_TYPE_ACCESS) { + name = XATTR_NAME_POSIX_ACL_ACCESS; + name_len = sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1; + } else { + name = XATTR_NAME_POSIX_ACL_DEFAULT; + name_len = sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1; + } + + ni_lock(ni); + + err = ntfs_get_ea(inode, name, name_len, buf, PATH_MAX, &req); + + ni_unlock(ni); + + /* Translate extended attribute to acl. */ + if (err >= 0) { + acl = posix_acl_from_xattr(&init_user_ns, buf, err); + } else if (err == -ENODATA) { + acl = NULL; + } else { + acl = ERR_PTR(err); + } + + if (!IS_ERR(acl)) + set_cached_acl(inode, type, acl); + + __putname(buf); + + return acl; +} + +static noinline int ntfs_set_acl_ex(struct mnt_idmap *idmap, + struct inode *inode, struct posix_acl *acl, + int type, bool init_acl) +{ + const char *name; + size_t size, name_len; + void *value; + int err; + int flags; + umode_t mode; + + if (S_ISLNK(inode->i_mode)) + return -EOPNOTSUPP; + + mode = inode->i_mode; + switch (type) { + case ACL_TYPE_ACCESS: + /* Do not change i_mode if we are in init_acl */ + if (acl && !init_acl) { + err = posix_acl_update_mode(idmap, inode, &mode, &acl); + if (err) + return err; + } + name = XATTR_NAME_POSIX_ACL_ACCESS; + name_len = sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1; + break; + + case ACL_TYPE_DEFAULT: + if (!S_ISDIR(inode->i_mode)) + return acl ? -EACCES : 0; + name = XATTR_NAME_POSIX_ACL_DEFAULT; + name_len = sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1; + break; + + default: + return -EINVAL; + } + + if (!acl) { + /* Remove xattr if it can be presented via mode. */ + size = 0; + value = NULL; + flags = XATTR_REPLACE; + } else { + size = posix_acl_xattr_size(acl->a_count); + value = kmalloc(size, GFP_NOFS); + if (!value) + return -ENOMEM; + err = posix_acl_to_xattr(&init_user_ns, acl, value, size); + if (err < 0) + goto out; + flags = 0; + } + + err = ntfs_set_ea(inode, name, name_len, value, size, flags, 0, NULL); + if (err == -ENODATA && !size) + err = 0; /* Removing non existed xattr. */ + if (!err) { + set_cached_acl(inode, type, acl); + inode->i_mode = mode; + inode_set_ctime_current(inode); + mark_inode_dirty(inode); + } + +out: + kfree(value); + + return err; +} + +/* + * ntfs_set_acl - inode_operations::set_acl + */ +int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, + struct posix_acl *acl, int type) +{ + return ntfs_set_acl_ex(idmap, d_inode(dentry), acl, type, false); +} + +/* + * ntfs_init_acl - Initialize the ACLs of a new inode. + * + * Called from ntfs_create_inode(). + */ +int ntfs_init_acl(struct mnt_idmap *idmap, struct inode *inode, + struct inode *dir) +{ + struct posix_acl *default_acl, *acl; + int err; + + err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl); + if (err) + return err; + + if (default_acl) { + err = ntfs_set_acl_ex(idmap, inode, default_acl, + ACL_TYPE_DEFAULT, true); + posix_acl_release(default_acl); + } else { + inode->i_default_acl = NULL; + } + + if (acl) { + if (!err) + err = ntfs_set_acl_ex(idmap, inode, acl, + ACL_TYPE_ACCESS, true); + posix_acl_release(acl); + } else { + inode->i_acl = NULL; + } + + return err; +} +#endif + +/* + * ntfs_acl_chmod - Helper for ntfs3_setattr(). + */ +int ntfs_acl_chmod(struct mnt_idmap *idmap, struct dentry *dentry) +{ + struct inode *inode = d_inode(dentry); + struct super_block *sb = inode->i_sb; + + if (!(sb->s_flags & SB_POSIXACL)) + return 0; + + if (S_ISLNK(inode->i_mode)) + return -EOPNOTSUPP; + + return posix_acl_chmod(idmap, dentry, inode->i_mode); +} + +/* + * ntfs_listxattr - inode_operations::listxattr + */ +ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size) +{ + struct inode *inode = d_inode(dentry); + struct ntfs_inode *ni = ntfs_i(inode); + ssize_t ret; + + if (!(ni->ni_flags & NI_FLAG_EA)) { + /* no xattr in file */ + return 0; + } + + ni_lock(ni); + + ret = ntfs_list_ea(ni, buffer, size); + + ni_unlock(ni); + + return ret; +} + +static int ntfs_getxattr(const struct xattr_handler *handler, struct dentry *de, + struct inode *inode, const char *name, void *buffer, + size_t size) +{ + int err; + struct ntfs_inode *ni = ntfs_i(inode); + + /* Dispatch request. */ + if (!strcmp(name, SYSTEM_DOS_ATTRIB)) { + /* system.dos_attrib */ + if (!buffer) { + err = sizeof(u8); + } else if (size < sizeof(u8)) { + err = -ENODATA; + } else { + err = sizeof(u8); + *(u8 *)buffer = le32_to_cpu(ni->std_fa); + } + goto out; + } + + if (!strcmp(name, SYSTEM_NTFS_ATTRIB) || + !strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) { + /* system.ntfs_attrib */ + if (!buffer) { + err = sizeof(u32); + } else if (size < sizeof(u32)) { + err = -ENODATA; + } else { + err = sizeof(u32); + *(u32 *)buffer = le32_to_cpu(ni->std_fa); + if (!strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) + *(__be32 *)buffer = cpu_to_be32(*(u32 *)buffer); + } + goto out; + } + + if (!strcmp(name, SYSTEM_NTFS_SECURITY)) { + /* system.ntfs_security*/ + struct SECURITY_DESCRIPTOR_RELATIVE *sd = NULL; + size_t sd_size = 0; + + if (!is_ntfs3(ni->mi.sbi)) { + /* We should get nt4 security. */ + err = -EINVAL; + goto out; + } else if (le32_to_cpu(ni->std_security_id) < + SECURITY_ID_FIRST) { + err = -ENOENT; + goto out; + } + + err = ntfs_get_security_by_id(ni->mi.sbi, ni->std_security_id, + &sd, &sd_size); + if (err) + goto out; + + if (!is_sd_valid(sd, sd_size)) { + ntfs_inode_warn( + inode, + "looks like you get incorrect security descriptor id=%u", + ni->std_security_id); + } + + if (!buffer) { + err = sd_size; + } else if (size < sd_size) { + err = -ENODATA; + } else { + err = sd_size; + memcpy(buffer, sd, sd_size); + } + kfree(sd); + goto out; + } + + /* Deal with NTFS extended attribute. */ + err = ntfs_get_ea(inode, name, strlen(name), buffer, size, NULL); + +out: + return err; +} + +/* + * ntfs_setxattr - inode_operations::setxattr + */ +static noinline int ntfs_setxattr(const struct xattr_handler *handler, + struct mnt_idmap *idmap, struct dentry *de, + struct inode *inode, const char *name, + const void *value, size_t size, int flags) +{ + int err = -EINVAL; + struct ntfs_inode *ni = ntfs_i(inode); + enum FILE_ATTRIBUTE new_fa; + + /* Dispatch request. */ + if (!strcmp(name, SYSTEM_DOS_ATTRIB)) { + if (sizeof(u8) != size) + goto out; + new_fa = cpu_to_le32(*(u8 *)value); + goto set_new_fa; + } + + if (!strcmp(name, SYSTEM_NTFS_ATTRIB) || + !strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) { + if (size != sizeof(u32)) + goto out; + if (!strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) + new_fa = cpu_to_le32(be32_to_cpu(*(__be32 *)value)); + else + new_fa = cpu_to_le32(*(u32 *)value); + + if (S_ISREG(inode->i_mode)) { + /* Process compressed/sparsed in special way. */ + ni_lock(ni); + err = ni_new_attr_flags(ni, new_fa); + ni_unlock(ni); + if (err) + goto out; + } +set_new_fa: + /* + * Thanks Mark Harmstone: + * Keep directory bit consistency. + */ + if (S_ISDIR(inode->i_mode)) + new_fa |= FILE_ATTRIBUTE_DIRECTORY; + else + new_fa &= ~FILE_ATTRIBUTE_DIRECTORY; + + if (ni->std_fa != new_fa) { + ni->std_fa = new_fa; + if (new_fa & FILE_ATTRIBUTE_READONLY) + inode->i_mode &= ~0222; + else + inode->i_mode |= 0222; + /* Std attribute always in primary record. */ + ni->mi.dirty = true; + mark_inode_dirty(inode); + } + err = 0; + + goto out; + } + + if (!strcmp(name, SYSTEM_NTFS_SECURITY)) { + /* system.ntfs_security*/ + __le32 security_id; + bool inserted; + struct ATTR_STD_INFO5 *std; + + if (!is_ntfs3(ni->mi.sbi)) { + /* + * We should replace ATTR_SECURE. + * Skip this way cause it is nt4 feature. + */ + err = -EINVAL; + goto out; + } + + if (!is_sd_valid(value, size)) { + err = -EINVAL; + ntfs_inode_warn( + inode, + "you try to set invalid security descriptor"); + goto out; + } + + err = ntfs_insert_security(ni->mi.sbi, value, size, + &security_id, &inserted); + if (err) + goto out; + + ni_lock(ni); + std = ni_std5(ni); + if (!std) { + err = -EINVAL; + } else if (std->security_id != security_id) { + std->security_id = ni->std_security_id = security_id; + /* Std attribute always in primary record. */ + ni->mi.dirty = true; + mark_inode_dirty(&ni->vfs_inode); + } + ni_unlock(ni); + goto out; + } + + /* Deal with NTFS extended attribute. */ + err = ntfs_set_ea(inode, name, strlen(name), value, size, flags, 0, + NULL); + +out: + inode_set_ctime_current(inode); + mark_inode_dirty(inode); + + return err; +} + +/* + * ntfs_save_wsl_perm + * + * save uid/gid/mode in xattr + */ +int ntfs_save_wsl_perm(struct inode *inode, __le16 *ea_size) +{ + int err; + __le32 value; + struct ntfs_inode *ni = ntfs_i(inode); + + ni_lock(ni); + value = cpu_to_le32(i_uid_read(inode)); + err = ntfs_set_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &value, + sizeof(value), 0, true, ea_size); + if (err) + goto out; + + value = cpu_to_le32(i_gid_read(inode)); + err = ntfs_set_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &value, + sizeof(value), 0, true, ea_size); + if (err) + goto out; + + value = cpu_to_le32(inode->i_mode); + err = ntfs_set_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &value, + sizeof(value), 0, true, ea_size); + if (err) + goto out; + + if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { + value = cpu_to_le32(inode->i_rdev); + err = ntfs_set_ea(inode, "$LXDEV", sizeof("$LXDEV") - 1, &value, + sizeof(value), 0, true, ea_size); + if (err) + goto out; + } + +out: + ni_unlock(ni); + /* In case of error should we delete all WSL xattr? */ + return err; +} + +/* + * ntfs_get_wsl_perm + * + * get uid/gid/mode from xattr + * it is called from ntfs_iget5->ntfs_read_mft + */ +void ntfs_get_wsl_perm(struct inode *inode) +{ + size_t sz; + __le32 value[3]; + + if (ntfs_get_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &value[0], + sizeof(value[0]), &sz) == sizeof(value[0]) && + ntfs_get_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &value[1], + sizeof(value[1]), &sz) == sizeof(value[1]) && + ntfs_get_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &value[2], + sizeof(value[2]), &sz) == sizeof(value[2])) { + i_uid_write(inode, (uid_t)le32_to_cpu(value[0])); + i_gid_write(inode, (gid_t)le32_to_cpu(value[1])); + inode->i_mode = le32_to_cpu(value[2]); + + if (ntfs_get_ea(inode, "$LXDEV", sizeof("$$LXDEV") - 1, + &value[0], sizeof(value), + &sz) == sizeof(value[0])) { + inode->i_rdev = le32_to_cpu(value[0]); + } + } +} + +static bool ntfs_xattr_user_list(struct dentry *dentry) +{ + return true; +} + +// clang-format off +static const struct xattr_handler ntfs_other_xattr_handler = { + .prefix = "", + .get = ntfs_getxattr, + .set = ntfs_setxattr, + .list = ntfs_xattr_user_list, +}; + +const struct xattr_handler *ntfs_xattr_handlers[] = { + &ntfs_other_xattr_handler, + NULL, +}; +// clang-format on -- cgit v1.2.3