--- /dev/null
-struct posix_acl *ntfs_get_acl(struct inode *inode, int type);
+ /* SPDX-License-Identifier: GPL-2.0 */
+ /*
+ *
+ * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
+ *
+ */
+
+ // clang-format off
+ #ifndef _LINUX_NTFS3_NTFS_FS_H
+ #define _LINUX_NTFS3_NTFS_FS_H
+
+ #define MINUS_ONE_T ((size_t)(-1))
+ /* Biggest MFT / smallest cluster */
+ #define MAXIMUM_BYTES_PER_MFT 4096
+ #define NTFS_BLOCKS_PER_MFT_RECORD (MAXIMUM_BYTES_PER_MFT / 512)
+
+ #define MAXIMUM_BYTES_PER_INDEX 4096
+ #define NTFS_BLOCKS_PER_INODE (MAXIMUM_BYTES_PER_INDEX / 512)
+
+ /* NTFS specific error code when fixup failed. */
+ #define E_NTFS_FIXUP 555
+ /* NTFS specific error code about resident->nonresident. */
+ #define E_NTFS_NONRESIDENT 556
+ /* NTFS specific error code about punch hole. */
+ #define E_NTFS_NOTALIGNED 557
+
+
+ /* sbi->flags */
+ #define NTFS_FLAGS_NODISCARD 0x00000001
+ /* Set when LogFile is replaying. */
+ #define NTFS_FLAGS_LOG_REPLAYING 0x00000008
+ /* Set when we changed first MFT's which copy must be updated in $MftMirr. */
+ #define NTFS_FLAGS_MFTMIRR 0x00001000
+ #define NTFS_FLAGS_NEED_REPLAY 0x04000000
+
+
+ /* ni->ni_flags */
+ /*
+ * Data attribute is external compressed (LZX/Xpress)
+ * 1 - WOF_COMPRESSION_XPRESS4K
+ * 2 - WOF_COMPRESSION_XPRESS8K
+ * 3 - WOF_COMPRESSION_XPRESS16K
+ * 4 - WOF_COMPRESSION_LZX32K
+ */
+ #define NI_FLAG_COMPRESSED_MASK 0x0000000f
+ /* Data attribute is deduplicated. */
+ #define NI_FLAG_DEDUPLICATED 0x00000010
+ #define NI_FLAG_EA 0x00000020
+ #define NI_FLAG_DIR 0x00000040
+ #define NI_FLAG_RESIDENT 0x00000080
+ #define NI_FLAG_UPDATE_PARENT 0x00000100
+ // clang-format on
+
+ struct ntfs_mount_options {
+ struct nls_table *nls;
+
+ kuid_t fs_uid;
+ kgid_t fs_gid;
+ u16 fs_fmask_inv;
+ u16 fs_dmask_inv;
+
+ unsigned uid : 1, /* uid was set. */
+ gid : 1, /* gid was set. */
+ fmask : 1, /* fmask was set. */
+ dmask : 1, /* dmask was set. */
+ sys_immutable : 1, /* Immutable system files. */
+ discard : 1, /* Issue discard requests on deletions. */
+ sparse : 1, /* Create sparse files. */
+ showmeta : 1, /* Show meta files. */
+ nohidden : 1, /* Do not show hidden files. */
+ force : 1, /* Rw mount dirty volume. */
+ no_acs_rules : 1, /*Exclude acs rules. */
+ prealloc : 1 /* Preallocate space when file is growing. */
+ ;
+ };
+
+ /* Special value to unpack and deallocate. */
+ #define RUN_DEALLOCATE ((struct runs_tree *)(size_t)1)
+
+ /* TODO: Use rb tree instead of array. */
+ struct runs_tree {
+ struct ntfs_run *runs;
+ size_t count; /* Currently used size a ntfs_run storage. */
+ size_t allocated; /* Currently allocated ntfs_run storage size. */
+ };
+
+ struct ntfs_buffers {
+ /* Biggest MFT / smallest cluster = 4096 / 512 = 8 */
+ /* Biggest index / smallest cluster = 4096 / 512 = 8 */
+ struct buffer_head *bh[PAGE_SIZE >> SECTOR_SHIFT];
+ u32 bytes;
+ u32 nbufs;
+ u32 off;
+ };
+
+ enum ALLOCATE_OPT {
+ ALLOCATE_DEF = 0, // Allocate all clusters.
+ ALLOCATE_MFT = 1, // Allocate for MFT.
+ };
+
+ enum bitmap_mutex_classes {
+ BITMAP_MUTEX_CLUSTERS = 0,
+ BITMAP_MUTEX_MFT = 1,
+ };
+
+ struct wnd_bitmap {
+ struct super_block *sb;
+ struct rw_semaphore rw_lock;
+
+ struct runs_tree run;
+ size_t nbits;
+
+ size_t total_zeroes; // Total number of free bits.
+ u16 *free_bits; // Free bits in each window.
+ size_t nwnd;
+ u32 bits_last; // Bits in last window.
+
+ struct rb_root start_tree; // Extents, sorted by 'start'.
+ struct rb_root count_tree; // Extents, sorted by 'count + start'.
+ size_t count; // Extents count.
+
+ /*
+ * -1 Tree is activated but not updated (too many fragments).
+ * 0 - Tree is not activated.
+ * 1 - Tree is activated and updated.
+ */
+ int uptodated;
+ size_t extent_min; // Minimal extent used while building.
+ size_t extent_max; // Upper estimate of biggest free block.
+
+ /* Zone [bit, end) */
+ size_t zone_bit;
+ size_t zone_end;
+
+ bool set_tail; // Not necessary in driver.
+ bool inited;
+ };
+
+ typedef int (*NTFS_CMP_FUNC)(const void *key1, size_t len1, const void *key2,
+ size_t len2, const void *param);
+
+ enum index_mutex_classed {
+ INDEX_MUTEX_I30 = 0,
+ INDEX_MUTEX_SII = 1,
+ INDEX_MUTEX_SDH = 2,
+ INDEX_MUTEX_SO = 3,
+ INDEX_MUTEX_SQ = 4,
+ INDEX_MUTEX_SR = 5,
+ INDEX_MUTEX_TOTAL
+ };
+
+ /* ntfs_index - Allocation unit inside directory. */
+ struct ntfs_index {
+ struct runs_tree bitmap_run;
+ struct runs_tree alloc_run;
+ /* read/write access to 'bitmap_run'/'alloc_run' while ntfs_readdir */
+ struct rw_semaphore run_lock;
+
+ /*TODO: Remove 'cmp'. */
+ NTFS_CMP_FUNC cmp;
+
+ u8 index_bits; // log2(root->index_block_size)
+ u8 idx2vbn_bits; // log2(root->index_block_clst)
+ u8 vbn2vbo_bits; // index_block_size < cluster? 9 : cluster_bits
+ u8 type; // index_mutex_classed
+ };
+
+ /* Minimum MFT zone. */
+ #define NTFS_MIN_MFT_ZONE 100
+
+ /* Ntfs file system in-core superblock data. */
+ struct ntfs_sb_info {
+ struct super_block *sb;
+
+ u32 discard_granularity;
+ u64 discard_granularity_mask_inv; // ~(discard_granularity_mask_inv-1)
+
+ u32 cluster_size; // bytes per cluster
+ u32 cluster_mask; // == cluster_size - 1
+ u64 cluster_mask_inv; // ~(cluster_size - 1)
+ u32 block_mask; // sb->s_blocksize - 1
+ u32 blocks_per_cluster; // cluster_size / sb->s_blocksize
+
+ u32 record_size;
+ u32 sector_size;
+ u32 index_size;
+
+ u8 sector_bits;
+ u8 cluster_bits;
+ u8 record_bits;
+
+ u64 maxbytes; // Maximum size for normal files.
+ u64 maxbytes_sparse; // Maximum size for sparse file.
+
+ u32 flags; // See NTFS_FLAGS_XXX.
+
+ CLST bad_clusters; // The count of marked bad clusters.
+
+ u16 max_bytes_per_attr; // Maximum attribute size in record.
+ u16 attr_size_tr; // Attribute size threshold (320 bytes).
+
+ /* Records in $Extend. */
+ CLST objid_no;
+ CLST quota_no;
+ CLST reparse_no;
+ CLST usn_jrnl_no;
+
+ struct ATTR_DEF_ENTRY *def_table; // Attribute definition table.
+ u32 def_entries;
+ u32 ea_max_size;
+
+ struct MFT_REC *new_rec;
+
+ u16 *upcase;
+
+ struct {
+ u64 lbo, lbo2;
+ struct ntfs_inode *ni;
+ struct wnd_bitmap bitmap; // $MFT::Bitmap
+ /*
+ * MFT records [11-24) used to expand MFT itself.
+ * They always marked as used in $MFT::Bitmap
+ * 'reserved_bitmap' contains real bitmap of these records.
+ */
+ ulong reserved_bitmap; // Bitmap of used records [11 - 24)
+ size_t next_free; // The next record to allocate from
+ size_t used; // MFT valid size in records.
+ u32 recs_mirr; // Number of records in MFTMirr
+ u8 next_reserved;
+ u8 reserved_bitmap_inited;
+ } mft;
+
+ struct {
+ struct wnd_bitmap bitmap; // $Bitmap::Data
+ CLST next_free_lcn;
+ } used;
+
+ struct {
+ u64 size; // In bytes.
+ u64 blocks; // In blocks.
+ u64 ser_num;
+ struct ntfs_inode *ni;
+ __le16 flags; // Cached current VOLUME_INFO::flags, VOLUME_FLAG_DIRTY.
+ u8 major_ver;
+ u8 minor_ver;
+ char label[65];
+ bool real_dirty; // Real fs state.
+ } volume;
+
+ struct {
+ struct ntfs_index index_sii;
+ struct ntfs_index index_sdh;
+ struct ntfs_inode *ni;
+ u32 next_id;
+ u64 next_off;
+
+ __le32 def_security_id;
+ } security;
+
+ struct {
+ struct ntfs_index index_r;
+ struct ntfs_inode *ni;
+ u64 max_size; // 16K
+ } reparse;
+
+ struct {
+ struct ntfs_index index_o;
+ struct ntfs_inode *ni;
+ } objid;
+
+ struct {
+ struct mutex mtx_lznt;
+ struct lznt *lznt;
+ #ifdef CONFIG_NTFS3_LZX_XPRESS
+ struct mutex mtx_xpress;
+ struct xpress_decompressor *xpress;
+ struct mutex mtx_lzx;
+ struct lzx_decompressor *lzx;
+ #endif
+ } compress;
+
+ struct ntfs_mount_options options;
+ struct ratelimit_state msg_ratelimit;
+ };
+
+ /* One MFT record(usually 1024 bytes), consists of attributes. */
+ struct mft_inode {
+ struct rb_node node;
+ struct ntfs_sb_info *sbi;
+
+ struct MFT_REC *mrec;
+ struct ntfs_buffers nb;
+
+ CLST rno;
+ bool dirty;
+ };
+
+ /* Nested class for ntfs_inode::ni_lock. */
+ enum ntfs_inode_mutex_lock_class {
+ NTFS_INODE_MUTEX_DIRTY,
+ NTFS_INODE_MUTEX_SECURITY,
+ NTFS_INODE_MUTEX_OBJID,
+ NTFS_INODE_MUTEX_REPARSE,
+ NTFS_INODE_MUTEX_NORMAL,
+ NTFS_INODE_MUTEX_PARENT,
+ };
+
+ /*
+ * sturct ntfs_inode
+ *
+ * Ntfs inode - extends linux inode. consists of one or more MFT inodes.
+ */
+ struct ntfs_inode {
+ struct mft_inode mi; // base record
+
+ /*
+ * Valid size: [0 - i_valid) - these range in file contains valid data.
+ * Range [i_valid - inode->i_size) - contains 0.
+ * Usually i_valid <= inode->i_size.
+ */
+ u64 i_valid;
+ struct timespec64 i_crtime;
+
+ struct mutex ni_lock;
+
+ /* File attributes from std. */
+ enum FILE_ATTRIBUTE std_fa;
+ __le32 std_security_id;
+
+ /*
+ * Tree of mft_inode.
+ * Not empty when primary MFT record (usually 1024 bytes) can't save all attributes
+ * e.g. file becomes too fragmented or contains a lot of names.
+ */
+ struct rb_root mi_tree;
+
+ /*
+ * This member is used in ntfs_readdir to ensure that all subrecords are loaded
+ */
+ u8 mi_loaded;
+
+ union {
+ struct ntfs_index dir;
+ struct {
+ struct rw_semaphore run_lock;
+ struct runs_tree run;
+ #ifdef CONFIG_NTFS3_LZX_XPRESS
+ struct page *offs_page;
+ #endif
+ } file;
+ };
+
+ struct {
+ struct runs_tree run;
+ struct ATTR_LIST_ENTRY *le; // 1K aligned memory.
+ size_t size;
+ bool dirty;
+ } attr_list;
+
+ size_t ni_flags; // NI_FLAG_XXX
+
+ struct inode vfs_inode;
+ };
+
+ struct indx_node {
+ struct ntfs_buffers nb;
+ struct INDEX_BUFFER *index;
+ };
+
+ struct ntfs_fnd {
+ int level;
+ struct indx_node *nodes[20];
+ struct NTFS_DE *de[20];
+ struct NTFS_DE *root_de;
+ };
+
+ enum REPARSE_SIGN {
+ REPARSE_NONE = 0,
+ REPARSE_COMPRESSED = 1,
+ REPARSE_DEDUPLICATED = 2,
+ REPARSE_LINK = 3
+ };
+
+ /* Functions from attrib.c */
+ int attr_load_runs(struct ATTRIB *attr, struct ntfs_inode *ni,
+ struct runs_tree *run, const CLST *vcn);
+ int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
+ CLST vcn, CLST lcn, CLST len, CLST *pre_alloc,
+ enum ALLOCATE_OPT opt, CLST *alen, const size_t fr,
+ CLST *new_lcn);
+ int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct ATTR_LIST_ENTRY *le, struct mft_inode *mi,
+ u64 new_size, struct runs_tree *run,
+ struct ATTRIB **ins_attr, struct page *page);
+ int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, struct runs_tree *run,
+ u64 new_size, const u64 *new_valid, bool keep_prealloc,
+ struct ATTRIB **ret);
+ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
+ CLST *len, bool *new);
+ int attr_data_read_resident(struct ntfs_inode *ni, struct page *page);
+ int attr_data_write_resident(struct ntfs_inode *ni, struct page *page);
+ int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, struct runs_tree *run,
+ CLST vcn);
+ int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, struct runs_tree *run,
+ u64 from, u64 to);
+ int attr_wof_frame_info(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct runs_tree *run, u64 frame, u64 frames,
+ u8 frame_bits, u32 *ondisk_size, u64 *vbo_data);
+ int attr_is_frame_compressed(struct ntfs_inode *ni, struct ATTRIB *attr,
+ CLST frame, CLST *clst_data);
+ int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size,
+ u64 new_valid);
+ int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes);
+ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size);
+
+ /* Functions from attrlist.c */
+ void al_destroy(struct ntfs_inode *ni);
+ bool al_verify(struct ntfs_inode *ni);
+ int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr);
+ struct ATTR_LIST_ENTRY *al_enumerate(struct ntfs_inode *ni,
+ struct ATTR_LIST_ENTRY *le);
+ struct ATTR_LIST_ENTRY *al_find_le(struct ntfs_inode *ni,
+ struct ATTR_LIST_ENTRY *le,
+ const struct ATTRIB *attr);
+ struct ATTR_LIST_ENTRY *al_find_ex(struct ntfs_inode *ni,
+ struct ATTR_LIST_ENTRY *le,
+ enum ATTR_TYPE type, const __le16 *name,
+ u8 name_len, const CLST *vcn);
+ int al_add_le(struct ntfs_inode *ni, enum ATTR_TYPE type, const __le16 *name,
+ u8 name_len, CLST svcn, __le16 id, const struct MFT_REF *ref,
+ struct ATTR_LIST_ENTRY **new_le);
+ bool al_remove_le(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le);
+ bool al_delete_le(struct ntfs_inode *ni, enum ATTR_TYPE type, CLST vcn,
+ const __le16 *name, size_t name_len,
+ const struct MFT_REF *ref);
+ int al_update(struct ntfs_inode *ni);
+ static inline size_t al_aligned(size_t size)
+ {
+ return (size + 1023) & ~(size_t)1023;
+ }
+
+ /* Globals from bitfunc.c */
+ bool are_bits_clear(const ulong *map, size_t bit, size_t nbits);
+ bool are_bits_set(const ulong *map, size_t bit, size_t nbits);
+ size_t get_set_bits_ex(const ulong *map, size_t bit, size_t nbits);
+
+ /* Globals from dir.c */
+ int ntfs_utf16_to_nls(struct ntfs_sb_info *sbi, const struct le_str *uni,
+ u8 *buf, int buf_len);
+ int ntfs_nls_to_utf16(struct ntfs_sb_info *sbi, const u8 *name, u32 name_len,
+ struct cpu_str *uni, u32 max_ulen,
+ enum utf16_endian endian);
+ struct inode *dir_search_u(struct inode *dir, const struct cpu_str *uni,
+ struct ntfs_fnd *fnd);
+ bool dir_is_empty(struct inode *dir);
+ extern const struct file_operations ntfs_dir_operations;
+
+ /* Globals from file.c */
+ int ntfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
+ struct kstat *stat, u32 request_mask, u32 flags);
+ void ntfs_sparse_cluster(struct inode *inode, struct page *page0, CLST vcn,
+ CLST len);
+ int ntfs3_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
+ struct iattr *attr);
+ int ntfs_file_open(struct inode *inode, struct file *file);
+ int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+ __u64 start, __u64 len);
+ extern const struct inode_operations ntfs_special_inode_operations;
+ extern const struct inode_operations ntfs_file_inode_operations;
+ extern const struct file_operations ntfs_file_operations;
+
+ /* Globals from frecord.c */
+ void ni_remove_mi(struct ntfs_inode *ni, struct mft_inode *mi);
+ struct ATTR_STD_INFO *ni_std(struct ntfs_inode *ni);
+ struct ATTR_STD_INFO5 *ni_std5(struct ntfs_inode *ni);
+ void ni_clear(struct ntfs_inode *ni);
+ int ni_load_mi_ex(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
+ int ni_load_mi(struct ntfs_inode *ni, const struct ATTR_LIST_ENTRY *le,
+ struct mft_inode **mi);
+ struct ATTRIB *ni_find_attr(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct ATTR_LIST_ENTRY **entry_o,
+ enum ATTR_TYPE type, const __le16 *name,
+ u8 name_len, const CLST *vcn,
+ struct mft_inode **mi);
+ struct ATTRIB *ni_enum_attr_ex(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct ATTR_LIST_ENTRY **le,
+ struct mft_inode **mi);
+ struct ATTRIB *ni_load_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, CLST vcn,
+ struct mft_inode **pmi);
+ int ni_load_all_mi(struct ntfs_inode *ni);
+ bool ni_add_subrecord(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi);
+ int ni_remove_attr(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, size_t name_len, bool base_only,
+ const __le16 *id);
+ int ni_create_attr_list(struct ntfs_inode *ni);
+ int ni_expand_list(struct ntfs_inode *ni);
+ int ni_insert_nonresident(struct ntfs_inode *ni, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len,
+ const struct runs_tree *run, CLST svcn, CLST len,
+ __le16 flags, struct ATTRIB **new_attr,
+ struct mft_inode **mi);
+ int ni_insert_resident(struct ntfs_inode *ni, u32 data_size,
+ enum ATTR_TYPE type, const __le16 *name, u8 name_len,
+ struct ATTRIB **new_attr, struct mft_inode **mi,
+ struct ATTR_LIST_ENTRY **le);
+ void ni_remove_attr_le(struct ntfs_inode *ni, struct ATTRIB *attr,
+ struct mft_inode *mi, struct ATTR_LIST_ENTRY *le);
+ int ni_delete_all(struct ntfs_inode *ni);
+ struct ATTR_FILE_NAME *ni_fname_name(struct ntfs_inode *ni,
+ const struct cpu_str *uni,
+ const struct MFT_REF *home,
+ struct mft_inode **mi,
+ struct ATTR_LIST_ENTRY **entry);
+ struct ATTR_FILE_NAME *ni_fname_type(struct ntfs_inode *ni, u8 name_type,
+ struct mft_inode **mi,
+ struct ATTR_LIST_ENTRY **entry);
+ int ni_new_attr_flags(struct ntfs_inode *ni, enum FILE_ATTRIBUTE new_fa);
+ enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
+ void *buffer);
+ int ni_write_inode(struct inode *inode, int sync, const char *hint);
+ #define _ni_write_inode(i, w) ni_write_inode(i, w, __func__)
+ int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
+ __u64 vbo, __u64 len);
+ int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page);
+ int ni_decompress_file(struct ntfs_inode *ni);
+ int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
+ u32 pages_per_frame);
+ int ni_write_frame(struct ntfs_inode *ni, struct page **pages,
+ u32 pages_per_frame);
+ int ni_remove_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
+ struct NTFS_DE *de, struct NTFS_DE **de2, int *undo_step);
+
+ bool ni_remove_name_undo(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
+ struct NTFS_DE *de, struct NTFS_DE *de2,
+ int undo_step);
+
+ int ni_add_name(struct ntfs_inode *dir_ni, struct ntfs_inode *ni,
+ struct NTFS_DE *de);
+
+ int ni_rename(struct ntfs_inode *dir_ni, struct ntfs_inode *new_dir_ni,
+ struct ntfs_inode *ni, struct NTFS_DE *de, struct NTFS_DE *new_de,
+ bool *is_bad);
+
+ bool ni_is_dirty(struct inode *inode);
+
+ /* Globals from fslog.c */
+ int log_replay(struct ntfs_inode *ni, bool *initialized);
+
+ /* Globals from fsntfs.c */
+ bool ntfs_fix_pre_write(struct NTFS_RECORD_HEADER *rhdr, size_t bytes);
+ int ntfs_fix_post_read(struct NTFS_RECORD_HEADER *rhdr, size_t bytes,
+ bool simple);
+ int ntfs_extend_init(struct ntfs_sb_info *sbi);
+ int ntfs_loadlog_and_replay(struct ntfs_inode *ni, struct ntfs_sb_info *sbi);
+ const struct ATTR_DEF_ENTRY *ntfs_query_def(struct ntfs_sb_info *sbi,
+ enum ATTR_TYPE Type);
+ int ntfs_look_for_free_space(struct ntfs_sb_info *sbi, CLST lcn, CLST len,
+ CLST *new_lcn, CLST *new_len,
+ enum ALLOCATE_OPT opt);
+ int ntfs_look_free_mft(struct ntfs_sb_info *sbi, CLST *rno, bool mft,
+ struct ntfs_inode *ni, struct mft_inode **mi);
+ void ntfs_mark_rec_free(struct ntfs_sb_info *sbi, CLST rno);
+ int ntfs_clear_mft_tail(struct ntfs_sb_info *sbi, size_t from, size_t to);
+ int ntfs_refresh_zone(struct ntfs_sb_info *sbi);
+ int ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait);
+ enum NTFS_DIRTY_FLAGS {
+ NTFS_DIRTY_CLEAR = 0,
+ NTFS_DIRTY_DIRTY = 1,
+ NTFS_DIRTY_ERROR = 2,
+ };
+ int ntfs_set_state(struct ntfs_sb_info *sbi, enum NTFS_DIRTY_FLAGS dirty);
+ int ntfs_sb_read(struct super_block *sb, u64 lbo, size_t bytes, void *buffer);
+ int ntfs_sb_write(struct super_block *sb, u64 lbo, size_t bytes,
+ const void *buffer, int wait);
+ int ntfs_sb_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+ u64 vbo, const void *buf, size_t bytes);
+ struct buffer_head *ntfs_bread_run(struct ntfs_sb_info *sbi,
+ const struct runs_tree *run, u64 vbo);
+ int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+ u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb);
+ int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
+ struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
+ struct ntfs_buffers *nb);
+ int ntfs_get_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
+ u32 bytes, struct ntfs_buffers *nb);
+ int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr,
+ struct ntfs_buffers *nb, int sync);
+ int ntfs_bio_pages(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+ struct page **pages, u32 nr_pages, u64 vbo, u32 bytes,
+ u32 op);
+ int ntfs_bio_fill_1(struct ntfs_sb_info *sbi, const struct runs_tree *run);
+ int ntfs_vbo_to_lbo(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+ u64 vbo, u64 *lbo, u64 *bytes);
+ struct ntfs_inode *ntfs_new_inode(struct ntfs_sb_info *sbi, CLST nRec,
+ bool dir);
+ extern const u8 s_default_security[0x50];
+ bool is_sd_valid(const struct SECURITY_DESCRIPTOR_RELATIVE *sd, u32 len);
+ int ntfs_security_init(struct ntfs_sb_info *sbi);
+ int ntfs_get_security_by_id(struct ntfs_sb_info *sbi, __le32 security_id,
+ struct SECURITY_DESCRIPTOR_RELATIVE **sd,
+ size_t *size);
+ int ntfs_insert_security(struct ntfs_sb_info *sbi,
+ const struct SECURITY_DESCRIPTOR_RELATIVE *sd,
+ u32 size, __le32 *security_id, bool *inserted);
+ int ntfs_reparse_init(struct ntfs_sb_info *sbi);
+ int ntfs_objid_init(struct ntfs_sb_info *sbi);
+ int ntfs_objid_remove(struct ntfs_sb_info *sbi, struct GUID *guid);
+ int ntfs_insert_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
+ const struct MFT_REF *ref);
+ int ntfs_remove_reparse(struct ntfs_sb_info *sbi, __le32 rtag,
+ const struct MFT_REF *ref);
+ void mark_as_free_ex(struct ntfs_sb_info *sbi, CLST lcn, CLST len, bool trim);
+ int run_deallocate(struct ntfs_sb_info *sbi, struct runs_tree *run, bool trim);
+
+ /* Globals from index.c */
+ int indx_used_bit(struct ntfs_index *indx, struct ntfs_inode *ni, size_t *bit);
+ void fnd_clear(struct ntfs_fnd *fnd);
+ static inline struct ntfs_fnd *fnd_get(void)
+ {
+ return kzalloc(sizeof(struct ntfs_fnd), GFP_NOFS);
+ }
+ static inline void fnd_put(struct ntfs_fnd *fnd)
+ {
+ if (fnd) {
+ fnd_clear(fnd);
+ kfree(fnd);
+ }
+ }
+ void indx_clear(struct ntfs_index *idx);
+ int indx_init(struct ntfs_index *indx, struct ntfs_sb_info *sbi,
+ const struct ATTRIB *attr, enum index_mutex_classed type);
+ struct INDEX_ROOT *indx_get_root(struct ntfs_index *indx, struct ntfs_inode *ni,
+ struct ATTRIB **attr, struct mft_inode **mi);
+ int indx_read(struct ntfs_index *idx, struct ntfs_inode *ni, CLST vbn,
+ struct indx_node **node);
+ int indx_find(struct ntfs_index *indx, struct ntfs_inode *dir,
+ const struct INDEX_ROOT *root, const void *Key, size_t KeyLen,
+ const void *param, int *diff, struct NTFS_DE **entry,
+ struct ntfs_fnd *fnd);
+ int indx_find_sort(struct ntfs_index *indx, struct ntfs_inode *ni,
+ const struct INDEX_ROOT *root, struct NTFS_DE **entry,
+ struct ntfs_fnd *fnd);
+ int indx_find_raw(struct ntfs_index *indx, struct ntfs_inode *ni,
+ const struct INDEX_ROOT *root, struct NTFS_DE **entry,
+ size_t *off, struct ntfs_fnd *fnd);
+ int indx_insert_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
+ const struct NTFS_DE *new_de, const void *param,
+ struct ntfs_fnd *fnd, bool undo);
+ int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
+ const void *key, u32 key_len, const void *param);
+ int indx_update_dup(struct ntfs_inode *ni, struct ntfs_sb_info *sbi,
+ const struct ATTR_FILE_NAME *fname,
+ const struct NTFS_DUP_INFO *dup, int sync);
+
+ /* Globals from inode.c */
+ struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
+ const struct cpu_str *name);
+ int ntfs_set_size(struct inode *inode, u64 new_size);
+ int reset_log_file(struct inode *inode);
+ int ntfs_get_block(struct inode *inode, sector_t vbn,
+ struct buffer_head *bh_result, int create);
+ int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc);
+ int ntfs_sync_inode(struct inode *inode);
+ int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,
+ struct inode *i2);
+ int inode_write_data(struct inode *inode, const void *data, size_t bytes);
+ struct inode *ntfs_create_inode(struct user_namespace *mnt_userns,
+ struct inode *dir, struct dentry *dentry,
+ const struct cpu_str *uni, umode_t mode,
+ dev_t dev, const char *symname, u32 size,
+ struct ntfs_fnd *fnd);
+ int ntfs_link_inode(struct inode *inode, struct dentry *dentry);
+ int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry);
+ void ntfs_evict_inode(struct inode *inode);
+ extern const struct inode_operations ntfs_link_inode_operations;
+ extern const struct address_space_operations ntfs_aops;
+ extern const struct address_space_operations ntfs_aops_cmpr;
+
+ /* Globals from name_i.c */
+ int fill_name_de(struct ntfs_sb_info *sbi, void *buf, const struct qstr *name,
+ const struct cpu_str *uni);
+ struct dentry *ntfs3_get_parent(struct dentry *child);
+
+ extern const struct inode_operations ntfs_dir_inode_operations;
+ extern const struct inode_operations ntfs_special_inode_operations;
+
+ /* Globals from record.c */
+ int mi_get(struct ntfs_sb_info *sbi, CLST rno, struct mft_inode **mi);
+ void mi_put(struct mft_inode *mi);
+ int mi_init(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno);
+ int mi_read(struct mft_inode *mi, bool is_mft);
+ struct ATTRIB *mi_enum_attr(struct mft_inode *mi, struct ATTRIB *attr);
+ // TODO: id?
+ struct ATTRIB *mi_find_attr(struct mft_inode *mi, struct ATTRIB *attr,
+ enum ATTR_TYPE type, const __le16 *name,
+ size_t name_len, const __le16 *id);
+ static inline struct ATTRIB *rec_find_attr_le(struct mft_inode *rec,
+ struct ATTR_LIST_ENTRY *le)
+ {
+ return mi_find_attr(rec, NULL, le->type, le_name(le), le->name_len,
+ &le->id);
+ }
+ int mi_write(struct mft_inode *mi, int wait);
+ int mi_format_new(struct mft_inode *mi, struct ntfs_sb_info *sbi, CLST rno,
+ __le16 flags, bool is_mft);
+ void mi_mark_free(struct mft_inode *mi);
+ struct ATTRIB *mi_insert_attr(struct mft_inode *mi, enum ATTR_TYPE type,
+ const __le16 *name, u8 name_len, u32 asize,
+ u16 name_off);
+
+ bool mi_remove_attr(struct ntfs_inode *ni, struct mft_inode *mi,
+ struct ATTRIB *attr);
+ bool mi_resize_attr(struct mft_inode *mi, struct ATTRIB *attr, int bytes);
+ int mi_pack_runs(struct mft_inode *mi, struct ATTRIB *attr,
+ struct runs_tree *run, CLST len);
+ static inline bool mi_is_ref(const struct mft_inode *mi,
+ const struct MFT_REF *ref)
+ {
+ if (le32_to_cpu(ref->low) != mi->rno)
+ return false;
+ if (ref->seq != mi->mrec->seq)
+ return false;
+
+ #ifdef CONFIG_NTFS3_64BIT_CLUSTER
+ return le16_to_cpu(ref->high) == (mi->rno >> 32);
+ #else
+ return !ref->high;
+ #endif
+ }
+
+ static inline void mi_get_ref(const struct mft_inode *mi, struct MFT_REF *ref)
+ {
+ ref->low = cpu_to_le32(mi->rno);
+ #ifdef CONFIG_NTFS3_64BIT_CLUSTER
+ ref->high = cpu_to_le16(mi->rno >> 32);
+ #else
+ ref->high = 0;
+ #endif
+ ref->seq = mi->mrec->seq;
+ }
+
+ /* Globals from run.c */
+ bool run_lookup_entry(const struct runs_tree *run, CLST vcn, CLST *lcn,
+ CLST *len, size_t *index);
+ void run_truncate(struct runs_tree *run, CLST vcn);
+ void run_truncate_head(struct runs_tree *run, CLST vcn);
+ void run_truncate_around(struct runs_tree *run, CLST vcn);
+ bool run_lookup(const struct runs_tree *run, CLST vcn, size_t *Index);
+ bool run_add_entry(struct runs_tree *run, CLST vcn, CLST lcn, CLST len,
+ bool is_mft);
+ bool run_collapse_range(struct runs_tree *run, CLST vcn, CLST len);
+ bool run_get_entry(const struct runs_tree *run, size_t index, CLST *vcn,
+ CLST *lcn, CLST *len);
+ bool run_is_mapped_full(const struct runs_tree *run, CLST svcn, CLST evcn);
+
+ int run_pack(const struct runs_tree *run, CLST svcn, CLST len, u8 *run_buf,
+ u32 run_buf_size, CLST *packed_vcns);
+ int run_unpack(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
+ CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
+ u32 run_buf_size);
+
+ #ifdef NTFS3_CHECK_FREE_CLST
+ int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
+ CLST svcn, CLST evcn, CLST vcn, const u8 *run_buf,
+ u32 run_buf_size);
+ #else
+ #define run_unpack_ex run_unpack
+ #endif
+ int run_get_highest_vcn(CLST vcn, const u8 *run_buf, u64 *highest_vcn);
+
+ /* Globals from super.c */
+ void *ntfs_set_shared(void *ptr, u32 bytes);
+ void *ntfs_put_shared(void *ptr);
+ void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len);
+ int ntfs_discard(struct ntfs_sb_info *sbi, CLST Lcn, CLST Len);
+
+ /* Globals from bitmap.c*/
+ int __init ntfs3_init_bitmap(void);
+ void ntfs3_exit_bitmap(void);
+ void wnd_close(struct wnd_bitmap *wnd);
+ static inline size_t wnd_zeroes(const struct wnd_bitmap *wnd)
+ {
+ return wnd->total_zeroes;
+ }
+ int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits);
+ int wnd_set_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
+ int wnd_set_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
+ bool wnd_is_free(struct wnd_bitmap *wnd, size_t bit, size_t bits);
+ bool wnd_is_used(struct wnd_bitmap *wnd, size_t bit, size_t bits);
+
+ /* Possible values for 'flags' 'wnd_find'. */
+ #define BITMAP_FIND_MARK_AS_USED 0x01
+ #define BITMAP_FIND_FULL 0x02
+ size_t wnd_find(struct wnd_bitmap *wnd, size_t to_alloc, size_t hint,
+ size_t flags, size_t *allocated);
+ int wnd_extend(struct wnd_bitmap *wnd, size_t new_bits);
+ void wnd_zone_set(struct wnd_bitmap *wnd, size_t Lcn, size_t Len);
+ int ntfs_trim_fs(struct ntfs_sb_info *sbi, struct fstrim_range *range);
+
+ /* Globals from upcase.c */
+ int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2,
+ const u16 *upcase, bool bothcase);
+ int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
+ const u16 *upcase, bool bothcase);
+
+ /* globals from xattr.c */
+ #ifdef CONFIG_NTFS3_FS_POSIX_ACL
++struct posix_acl *ntfs_get_acl(struct inode *inode, int type, bool rcu);
+ int ntfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
+ struct posix_acl *acl, int type);
+ int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
+ struct inode *dir);
+ #else
+ #define ntfs_get_acl NULL
+ #define ntfs_set_acl NULL
+ #endif
+
+ int ntfs_acl_chmod(struct user_namespace *mnt_userns, struct inode *inode);
+ int ntfs_permission(struct user_namespace *mnt_userns, struct inode *inode,
+ int mask);
+ ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
+ extern const struct xattr_handler *ntfs_xattr_handlers[];
+
+ int ntfs_save_wsl_perm(struct inode *inode);
+ void ntfs_get_wsl_perm(struct inode *inode);
+
+ /* globals from lznt.c */
+ struct lznt *get_lznt_ctx(int level);
+ size_t compress_lznt(const void *uncompressed, size_t uncompressed_size,
+ void *compressed, size_t compressed_size,
+ struct lznt *ctx);
+ ssize_t decompress_lznt(const void *compressed, size_t compressed_size,
+ void *uncompressed, size_t uncompressed_size);
+
+ static inline bool is_ntfs3(struct ntfs_sb_info *sbi)
+ {
+ return sbi->volume.major_ver >= 3;
+ }
+
+ /* (sb->s_flags & SB_ACTIVE) */
+ static inline bool is_mounted(struct ntfs_sb_info *sbi)
+ {
+ return !!sbi->sb->s_root;
+ }
+
+ static inline bool ntfs_is_meta_file(struct ntfs_sb_info *sbi, CLST rno)
+ {
+ return rno < MFT_REC_FREE || rno == sbi->objid_no ||
+ rno == sbi->quota_no || rno == sbi->reparse_no ||
+ rno == sbi->usn_jrnl_no;
+ }
+
+ static inline void ntfs_unmap_page(struct page *page)
+ {
+ kunmap(page);
+ put_page(page);
+ }
+
+ static inline struct page *ntfs_map_page(struct address_space *mapping,
+ unsigned long index)
+ {
+ struct page *page = read_mapping_page(mapping, index, NULL);
+
+ if (!IS_ERR(page)) {
+ kmap(page);
+ if (!PageError(page))
+ return page;
+ ntfs_unmap_page(page);
+ return ERR_PTR(-EIO);
+ }
+ return page;
+ }
+
+ static inline size_t wnd_zone_bit(const struct wnd_bitmap *wnd)
+ {
+ return wnd->zone_bit;
+ }
+
+ static inline size_t wnd_zone_len(const struct wnd_bitmap *wnd)
+ {
+ return wnd->zone_end - wnd->zone_bit;
+ }
+
+ static inline void run_init(struct runs_tree *run)
+ {
+ run->runs = NULL;
+ run->count = 0;
+ run->allocated = 0;
+ }
+
+ static inline struct runs_tree *run_alloc(void)
+ {
+ return kzalloc(sizeof(struct runs_tree), GFP_NOFS);
+ }
+
+ static inline void run_close(struct runs_tree *run)
+ {
+ kvfree(run->runs);
+ memset(run, 0, sizeof(*run));
+ }
+
+ static inline void run_free(struct runs_tree *run)
+ {
+ if (run) {
+ kvfree(run->runs);
+ kfree(run);
+ }
+ }
+
+ static inline bool run_is_empty(struct runs_tree *run)
+ {
+ return !run->count;
+ }
+
+ /* NTFS uses quad aligned bitmaps. */
+ static inline size_t bitmap_size(size_t bits)
+ {
+ return ALIGN((bits + 7) >> 3, 8);
+ }
+
+ #define _100ns2seconds 10000000
+ #define SecondsToStartOf1970 0x00000002B6109100
+
+ #define NTFS_TIME_GRAN 100
+
+ /*
+ * kernel2nt - Converts in-memory kernel timestamp into nt time.
+ */
+ static inline __le64 kernel2nt(const struct timespec64 *ts)
+ {
+ // 10^7 units of 100 nanoseconds one second
+ return cpu_to_le64(_100ns2seconds *
+ (ts->tv_sec + SecondsToStartOf1970) +
+ ts->tv_nsec / NTFS_TIME_GRAN);
+ }
+
+ /*
+ * nt2kernel - Converts on-disk nt time into kernel timestamp.
+ */
+ static inline void nt2kernel(const __le64 tm, struct timespec64 *ts)
+ {
+ u64 t = le64_to_cpu(tm) - _100ns2seconds * SecondsToStartOf1970;
+
+ // WARNING: do_div changes its first argument(!)
+ ts->tv_nsec = do_div(t, _100ns2seconds) * 100;
+ ts->tv_sec = t;
+ }
+
+ static inline struct ntfs_sb_info *ntfs_sb(struct super_block *sb)
+ {
+ return sb->s_fs_info;
+ }
+
+ /*
+ * ntfs_up_cluster - Align up on cluster boundary.
+ */
+ static inline u64 ntfs_up_cluster(const struct ntfs_sb_info *sbi, u64 size)
+ {
+ return (size + sbi->cluster_mask) & sbi->cluster_mask_inv;
+ }
+
+ /*
+ * ntfs_up_block - Align up on cluster boundary.
+ */
+ static inline u64 ntfs_up_block(const struct super_block *sb, u64 size)
+ {
+ return (size + sb->s_blocksize - 1) & ~(u64)(sb->s_blocksize - 1);
+ }
+
+ static inline CLST bytes_to_cluster(const struct ntfs_sb_info *sbi, u64 size)
+ {
+ return (size + sbi->cluster_mask) >> sbi->cluster_bits;
+ }
+
+ static inline u64 bytes_to_block(const struct super_block *sb, u64 size)
+ {
+ return (size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
+ }
+
+ static inline struct buffer_head *ntfs_bread(struct super_block *sb,
+ sector_t block)
+ {
+ struct buffer_head *bh = sb_bread(sb, block);
+
+ if (bh)
+ return bh;
+
+ ntfs_err(sb, "failed to read volume at offset 0x%llx",
+ (u64)block << sb->s_blocksize_bits);
+ return NULL;
+ }
+
+ static inline struct ntfs_inode *ntfs_i(struct inode *inode)
+ {
+ return container_of(inode, struct ntfs_inode, vfs_inode);
+ }
+
+ static inline bool is_compressed(const struct ntfs_inode *ni)
+ {
+ return (ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) ||
+ (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
+ }
+
+ static inline int ni_ext_compress_bits(const struct ntfs_inode *ni)
+ {
+ return 0xb + (ni->ni_flags & NI_FLAG_COMPRESSED_MASK);
+ }
+
+ /* Bits - 0xc, 0xd, 0xe, 0xf, 0x10 */
+ static inline void ni_set_ext_compress_bits(struct ntfs_inode *ni, u8 bits)
+ {
+ ni->ni_flags |= (bits - 0xb) & NI_FLAG_COMPRESSED_MASK;
+ }
+
+ static inline bool is_dedup(const struct ntfs_inode *ni)
+ {
+ return ni->ni_flags & NI_FLAG_DEDUPLICATED;
+ }
+
+ static inline bool is_encrypted(const struct ntfs_inode *ni)
+ {
+ return ni->std_fa & FILE_ATTRIBUTE_ENCRYPTED;
+ }
+
+ static inline bool is_sparsed(const struct ntfs_inode *ni)
+ {
+ return ni->std_fa & FILE_ATTRIBUTE_SPARSE_FILE;
+ }
+
+ static inline int is_resident(struct ntfs_inode *ni)
+ {
+ return ni->ni_flags & NI_FLAG_RESIDENT;
+ }
+
+ static inline void le16_sub_cpu(__le16 *var, u16 val)
+ {
+ *var = cpu_to_le16(le16_to_cpu(*var) - val);
+ }
+
+ static inline void le32_sub_cpu(__le32 *var, u32 val)
+ {
+ *var = cpu_to_le32(le32_to_cpu(*var) - val);
+ }
+
+ static inline void nb_put(struct ntfs_buffers *nb)
+ {
+ u32 i, nbufs = nb->nbufs;
+
+ if (!nbufs)
+ return;
+
+ for (i = 0; i < nbufs; i++)
+ put_bh(nb->bh[i]);
+ nb->nbufs = 0;
+ }
+
+ static inline void put_indx_node(struct indx_node *in)
+ {
+ if (!in)
+ return;
+
+ kfree(in->index);
+ nb_put(&in->nb);
+ kfree(in);
+ }
+
+ static inline void mi_clear(struct mft_inode *mi)
+ {
+ nb_put(&mi->nb);
+ kfree(mi->mrec);
+ mi->mrec = NULL;
+ }
+
+ static inline void ni_lock(struct ntfs_inode *ni)
+ {
+ mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_NORMAL);
+ }
+
+ static inline void ni_lock_dir(struct ntfs_inode *ni)
+ {
+ mutex_lock_nested(&ni->ni_lock, NTFS_INODE_MUTEX_PARENT);
+ }
+
+ static inline void ni_unlock(struct ntfs_inode *ni)
+ {
+ mutex_unlock(&ni->ni_lock);
+ }
+
+ static inline int ni_trylock(struct ntfs_inode *ni)
+ {
+ return mutex_trylock(&ni->ni_lock);
+ }
+
+ static inline int attr_load_runs_attr(struct ntfs_inode *ni,
+ struct ATTRIB *attr,
+ struct runs_tree *run, CLST vcn)
+ {
+ return attr_load_runs_vcn(ni, attr->type, attr_name(attr),
+ attr->name_len, run, vcn);
+ }
+
+ static inline void le64_sub_cpu(__le64 *var, u64 val)
+ {
+ *var = cpu_to_le64(le64_to_cpu(*var) - val);
+ }
+
+ #endif /* _LINUX_NTFS3_NTFS_FS_H */
--- /dev/null
-struct posix_acl *ntfs_get_acl(struct inode *inode, int type)
+ // SPDX-License-Identifier: GPL-2.0
+ /*
+ *
+ * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
+ *
+ */
+
+ #include <linux/blkdev.h>
+ #include <linux/buffer_head.h>
+ #include <linux/fs.h>
+ #include <linux/nls.h>
+ #include <linux/posix_acl.h>
+ #include <linux/posix_acl_xattr.h>
+ #include <linux/xattr.h>
+
+ #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_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)
+ {
+ *off = 0;
+
+ if (!ea_all || !bytes)
+ return false;
+
+ for (;;) {
+ const struct EA_FULL *ea = Add2Ptr(ea_all, *off);
+ u32 next_off = *off + unpacked_ea_size(ea);
+
+ if (next_off > bytes)
+ return false;
+
+ if (ea->name_len == name_len &&
+ !memcmp(ea->name, name, name_len))
+ return true;
+
+ *off = next_off;
+ if (next_off >= bytes)
+ 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;
+ struct ATTR_LIST_ENTRY *le = NULL;
+ struct ATTRIB *attr_info, *attr_ea;
+ void *ea_p;
+ u32 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)
+ return -EINVAL;
+
+ /* Check Ea limit. */
+ size = le32_to_cpu((*info)->size);
+ if (size > ni->mi.sbi->ea_max_size)
+ return -EFBIG;
+
+ if (attr_size(attr_ea) > ni->mi.sbi->ea_max_size)
+ return -EFBIG;
+
+ /* Allocate memory for packed Ea. */
+ ea_p = kmalloc(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(attr_ea, ni, &run, NULL);
+ if (!err)
+ err = ntfs_read_run_nb(ni->mi.sbi, &run, 0, ea_p, size,
+ NULL);
+ run_close(&run);
+
+ if (err)
+ goto out;
+ } else {
+ void *p = resident_data_ex(attr_ea, size);
+
+ if (!p) {
+ err = -EINVAL;
+ goto out;
+ }
+ memcpy(ea_p, p, size);
+ }
+
+ memset(Add2Ptr(ea_p, size), 0, add_bytes);
+ *ea = ea_p;
+ return 0;
+
+ out:
+ kfree(ea_p);
+ *ea = NULL;
+ 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;
+ 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. */
+ for (ret = 0, off = 0; off < size; off += unpacked_ea_size(ea)) {
+ ea = Add2Ptr(ea_all, off);
+
+ if (buffer) {
+ 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)) {
+ 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, int locked)
+ {
+ 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;
+ __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)) {
+ struct EA_FULL *ea;
+ size_t ea_sz;
+
+ 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);
+
+ ea_sz = unpacked_ea_size(ea);
+
+ 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);
+
+ /* Should fit into 16 bits. */
+ if (new_pack > 0xffff) {
+ err = -EFBIG; // -EINVAL?
+ goto out;
+ }
+ ea_info.size_pack = cpu_to_le16(new_pack);
+
+ /* New size of ATTR_EA. */
+ size += add;
+ if (size > sbi->ea_max_size) {
+ err = -EFBIG; // -EINVAL?
+ goto out;
+ }
+ ea_info.size = cpu_to_le32(size);
+
+ 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 = ntfs_sb_write_run(sbi, &ea_run, 0, ea_all, size);
+ 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;
+ 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
+ static inline void ntfs_posix_acl_release(struct posix_acl *acl)
+ {
+ if (acl && refcount_dec_and_test(&acl->a_refcount))
+ kfree(acl);
+ }
+
+ static struct posix_acl *ntfs_get_acl_ex(struct user_namespace *mnt_userns,
+ struct inode *inode, int type,
+ int locked)
+ {
+ 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;
+ }
+
+ if (!locked)
+ ni_lock(ni);
+
+ err = ntfs_get_ea(inode, name, name_len, buf, PATH_MAX, &req);
+
+ if (!locked)
+ ni_unlock(ni);
+
+ /* Translate extended attribute to acl. */
+ if (err >= 0) {
+ acl = posix_acl_from_xattr(mnt_userns, buf, err);
+ if (!IS_ERR(acl))
+ set_cached_acl(inode, type, acl);
+ } else {
+ acl = err == -ENODATA ? NULL : ERR_PTR(err);
+ }
+
+ __putname(buf);
+
+ return acl;
+ }
+
+ /*
+ * ntfs_get_acl - inode_operations::get_acl
+ */
- acl = ntfs_get_acl(inode, type);
++struct posix_acl *ntfs_get_acl(struct inode *inode, int type, bool rcu)
+ {
++ if (rcu)
++ return ERR_PTR(-ECHILD);
++
+ /* TODO: init_user_ns? */
+ return ntfs_get_acl_ex(&init_user_ns, inode, type, 0);
+ }
+
+ static noinline int ntfs_set_acl_ex(struct user_namespace *mnt_userns,
+ struct inode *inode, struct posix_acl *acl,
+ int type, int locked)
+ {
+ const char *name;
+ size_t size, name_len;
+ void *value = NULL;
+ int err = 0;
+
+ if (S_ISLNK(inode->i_mode))
+ return -EOPNOTSUPP;
+
+ switch (type) {
+ case ACL_TYPE_ACCESS:
+ if (acl) {
+ umode_t mode = inode->i_mode;
+
+ err = posix_acl_equiv_mode(acl, &mode);
+ if (err < 0)
+ return err;
+
+ if (inode->i_mode != mode) {
+ inode->i_mode = mode;
+ mark_inode_dirty(inode);
+ }
+
+ if (!err) {
+ /*
+ * ACL can be exactly represented in the
+ * traditional file mode permission bits.
+ */
+ acl = NULL;
+ }
+ }
+ 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) {
+ size = 0;
+ value = NULL;
+ } else {
+ size = posix_acl_xattr_size(acl->a_count);
+ value = kmalloc(size, GFP_NOFS);
+ if (!value)
+ return -ENOMEM;
+
+ err = posix_acl_to_xattr(mnt_userns, acl, value, size);
+ if (err < 0)
+ goto out;
+ }
+
+ err = ntfs_set_ea(inode, name, name_len, value, size, 0, locked);
+ if (!err)
+ set_cached_acl(inode, type, acl);
+
+ out:
+ kfree(value);
+
+ return err;
+ }
+
+ /*
+ * ntfs_set_acl - inode_operations::set_acl
+ */
+ int ntfs_set_acl(struct user_namespace *mnt_userns, struct inode *inode,
+ struct posix_acl *acl, int type)
+ {
+ return ntfs_set_acl_ex(mnt_userns, inode, acl, type, 0);
+ }
+
+ static int ntfs_xattr_get_acl(struct user_namespace *mnt_userns,
+ struct inode *inode, int type, void *buffer,
+ size_t size)
+ {
+ struct posix_acl *acl;
+ int err;
+
+ if (!(inode->i_sb->s_flags & SB_POSIXACL)) {
+ ntfs_inode_warn(inode, "add mount option \"acl\" to use acl");
+ return -EOPNOTSUPP;
+ }
+
++ acl = ntfs_get_acl(inode, type, false);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+
+ if (!acl)
+ return -ENODATA;
+
+ err = posix_acl_to_xattr(mnt_userns, acl, buffer, size);
+ ntfs_posix_acl_release(acl);
+
+ return err;
+ }
+
+ static int ntfs_xattr_set_acl(struct user_namespace *mnt_userns,
+ struct inode *inode, int type, const void *value,
+ size_t size)
+ {
+ struct posix_acl *acl;
+ int err;
+
+ if (!(inode->i_sb->s_flags & SB_POSIXACL)) {
+ ntfs_inode_warn(inode, "add mount option \"acl\" to use acl");
+ return -EOPNOTSUPP;
+ }
+
+ if (!inode_owner_or_capable(mnt_userns, inode))
+ return -EPERM;
+
+ if (!value) {
+ acl = NULL;
+ } else {
+ acl = posix_acl_from_xattr(mnt_userns, value, size);
+ if (IS_ERR(acl))
+ return PTR_ERR(acl);
+
+ if (acl) {
+ err = posix_acl_valid(mnt_userns, acl);
+ if (err)
+ goto release_and_out;
+ }
+ }
+
+ err = ntfs_set_acl(mnt_userns, inode, acl, type);
+
+ release_and_out:
+ ntfs_posix_acl_release(acl);
+ return err;
+ }
+
+ /*
+ * ntfs_init_acl - Initialize the ACLs of a new inode.
+ *
+ * Called from ntfs_create_inode().
+ */
+ int ntfs_init_acl(struct user_namespace *mnt_userns, struct inode *inode,
+ struct inode *dir)
+ {
+ struct posix_acl *default_acl, *acl;
+ int err;
+
+ /*
+ * TODO: Refactoring lock.
+ * ni_lock(dir) ... -> posix_acl_create(dir,...) -> ntfs_get_acl -> ni_lock(dir)
+ */
+ inode->i_default_acl = NULL;
+
+ default_acl = ntfs_get_acl_ex(mnt_userns, dir, ACL_TYPE_DEFAULT, 1);
+
+ if (!default_acl || default_acl == ERR_PTR(-EOPNOTSUPP)) {
+ inode->i_mode &= ~current_umask();
+ err = 0;
+ goto out;
+ }
+
+ if (IS_ERR(default_acl)) {
+ err = PTR_ERR(default_acl);
+ goto out;
+ }
+
+ acl = default_acl;
+ err = __posix_acl_create(&acl, GFP_NOFS, &inode->i_mode);
+ if (err < 0)
+ goto out1;
+ if (!err) {
+ posix_acl_release(acl);
+ acl = NULL;
+ }
+
+ if (!S_ISDIR(inode->i_mode)) {
+ posix_acl_release(default_acl);
+ default_acl = NULL;
+ }
+
+ if (default_acl)
+ err = ntfs_set_acl_ex(mnt_userns, inode, default_acl,
+ ACL_TYPE_DEFAULT, 1);
+
+ if (!acl)
+ inode->i_acl = NULL;
+ else if (!err)
+ err = ntfs_set_acl_ex(mnt_userns, inode, acl, ACL_TYPE_ACCESS,
+ 1);
+
+ posix_acl_release(acl);
+ out1:
+ posix_acl_release(default_acl);
+
+ out:
+ return err;
+ }
+ #endif
+
+ /*
+ * ntfs_acl_chmod - Helper for ntfs3_setattr().
+ */
+ int ntfs_acl_chmod(struct user_namespace *mnt_userns, struct inode *inode)
+ {
+ 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(mnt_userns, inode, inode->i_mode);
+ }
+
+ /*
+ * ntfs_permission - inode_operations::permission
+ */
+ int ntfs_permission(struct user_namespace *mnt_userns, struct inode *inode,
+ int mask)
+ {
+ if (ntfs_sb(inode->i_sb)->options.no_acs_rules) {
+ /* "No access rules" mode - Allow all changes. */
+ return 0;
+ }
+
+ return generic_permission(mnt_userns, inode, mask);
+ }
+
+ /*
+ * 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);
+ size_t name_len = strlen(name);
+
+ /* Dispatch request. */
+ if (name_len == sizeof(SYSTEM_DOS_ATTRIB) - 1 &&
+ !memcmp(name, SYSTEM_DOS_ATTRIB, sizeof(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 (name_len == sizeof(SYSTEM_NTFS_ATTRIB) - 1 &&
+ !memcmp(name, SYSTEM_NTFS_ATTRIB, sizeof(SYSTEM_NTFS_ATTRIB))) {
+ /* 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);
+ }
+ goto out;
+ }
+
+ if (name_len == sizeof(SYSTEM_NTFS_SECURITY) - 1 &&
+ !memcmp(name, SYSTEM_NTFS_SECURITY, sizeof(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;
+ }
+
+ #ifdef CONFIG_NTFS3_FS_POSIX_ACL
+ if ((name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1 &&
+ !memcmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
+ sizeof(XATTR_NAME_POSIX_ACL_ACCESS))) ||
+ (name_len == sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1 &&
+ !memcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
+ sizeof(XATTR_NAME_POSIX_ACL_DEFAULT)))) {
+ /* TODO: init_user_ns? */
+ err = ntfs_xattr_get_acl(
+ &init_user_ns, inode,
+ name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1
+ ? ACL_TYPE_ACCESS
+ : ACL_TYPE_DEFAULT,
+ buffer, size);
+ goto out;
+ }
+ #endif
+ /* Deal with NTFS extended attribute. */
+ err = ntfs_get_ea(inode, name, name_len, buffer, size, NULL);
+
+ out:
+ return err;
+ }
+
+ /*
+ * ntfs_setxattr - inode_operations::setxattr
+ */
+ static noinline int ntfs_setxattr(const struct xattr_handler *handler,
+ struct user_namespace *mnt_userns,
+ 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);
+ size_t name_len = strlen(name);
+ enum FILE_ATTRIBUTE new_fa;
+
+ /* Dispatch request. */
+ if (name_len == sizeof(SYSTEM_DOS_ATTRIB) - 1 &&
+ !memcmp(name, SYSTEM_DOS_ATTRIB, sizeof(SYSTEM_DOS_ATTRIB))) {
+ if (sizeof(u8) != size)
+ goto out;
+ new_fa = cpu_to_le32(*(u8 *)value);
+ goto set_new_fa;
+ }
+
+ if (name_len == sizeof(SYSTEM_NTFS_ATTRIB) - 1 &&
+ !memcmp(name, SYSTEM_NTFS_ATTRIB, sizeof(SYSTEM_NTFS_ATTRIB))) {
+ if (size != sizeof(u32))
+ goto out;
+ 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 (name_len == sizeof(SYSTEM_NTFS_SECURITY) - 1 &&
+ !memcmp(name, SYSTEM_NTFS_SECURITY, sizeof(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;
+ }
+
+ #ifdef CONFIG_NTFS3_FS_POSIX_ACL
+ if ((name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1 &&
+ !memcmp(name, XATTR_NAME_POSIX_ACL_ACCESS,
+ sizeof(XATTR_NAME_POSIX_ACL_ACCESS))) ||
+ (name_len == sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1 &&
+ !memcmp(name, XATTR_NAME_POSIX_ACL_DEFAULT,
+ sizeof(XATTR_NAME_POSIX_ACL_DEFAULT)))) {
+ err = ntfs_xattr_set_acl(
+ mnt_userns, inode,
+ name_len == sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1
+ ? ACL_TYPE_ACCESS
+ : ACL_TYPE_DEFAULT,
+ value, size);
+ goto out;
+ }
+ #endif
+ /* Deal with NTFS extended attribute. */
+ err = ntfs_set_ea(inode, name, name_len, value, size, flags, 0);
+
+ out:
+ return err;
+ }
+
+ /*
+ * ntfs_save_wsl_perm
+ *
+ * save uid/gid/mode in xattr
+ */
+ int ntfs_save_wsl_perm(struct inode *inode)
+ {
+ int err;
+ __le32 value;
+
+ value = cpu_to_le32(i_uid_read(inode));
+ err = ntfs_set_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &value,
+ sizeof(value), 0, 0);
+ if (err)
+ goto out;
+
+ value = cpu_to_le32(i_gid_read(inode));
+ err = ntfs_set_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &value,
+ sizeof(value), 0, 0);
+ if (err)
+ goto out;
+
+ value = cpu_to_le32(inode->i_mode);
+ err = ntfs_set_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &value,
+ sizeof(value), 0, 0);
+ if (err)
+ goto out;
+
+ if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
+ value = cpu_to_le32(inode->i_rdev);
+ err = ntfs_set_ea(inode, "$LXDEV", sizeof("$LXDEV") - 1, &value,
+ sizeof(value), 0, 0);
+ if (err)
+ goto out;
+ }
+
+ out:
+ /* In case of error should we delete all WSL xattr? */
+ return err;
+ }
+
+ /*
+ * ntfs_get_wsl_perm
+ *
+ * get uid/gid/mode from xattr
+ * it is called from ntfs_iget5->ntfs_read_mft
+ */
+ void ntfs_get_wsl_perm(struct inode *inode)
+ {
+ size_t sz;
+ __le32 value[3];
+
+ if (ntfs_get_ea(inode, "$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_xattr_handler = {
+ .prefix = "",
+ .get = ntfs_getxattr,
+ .set = ntfs_setxattr,
+ .list = ntfs_xattr_user_list,
+ };
+
+ const struct xattr_handler *ntfs_xattr_handlers[] = {
+ &ntfs_xattr_handler,
+ NULL,
+ };
+ // clang-format on
projects / kernel.git / commitdiff