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[PATCH OLK-5.10 030/107] fs/ntfs3: Restyle comments to better align with kernel-doc
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> mainline inclusion from mainline-v5.15 commit d3624466b56dd5b1886c1dff500525b544c19c83 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/attrib.c | 18 +++++++++++------- fs/ntfs3/bitmap.c | 5 ++--- fs/ntfs3/file.c | 18 +++++++++--------- fs/ntfs3/frecord.c | 27 +++++++++++++-------------- fs/ntfs3/fslog.c | 11 +++++++---- fs/ntfs3/fsntfs.c | 8 ++++---- fs/ntfs3/index.c | 8 +++++--- fs/ntfs3/inode.c | 20 ++++++++++---------- fs/ntfs3/lznt.c | 5 +++-- fs/ntfs3/ntfs.h | 2 +- fs/ntfs3/ntfs_fs.h | 24 ++++++++++++------------ fs/ntfs3/record.c | 2 +- fs/ntfs3/super.c | 2 +- fs/ntfs3/upcase.c | 2 +- fs/ntfs3/xattr.c | 7 ++++--- 15 files changed, 84 insertions(+), 75 deletions(-) diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c index ffc323bacc9f..34c4cbf7e29b 100644 --- a/fs/ntfs3/attrib.c +++ b/fs/ntfs3/attrib.c @@ -199,6 +199,7 @@ int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run, /* Add new fragment into run storage. */ if (!run_add_entry(run, vcn, lcn, flen, opt == ALLOCATE_MFT)) { + /* Undo last 'ntfs_look_for_free_space' */ down_write_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS); wnd_set_free(wnd, lcn, flen); up_write(&wnd->rw_lock); @@ -351,7 +352,6 @@ int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr, run_close(run); out1: kfree(attr_s); - /* Reinsert le. */ out: return err; } @@ -1153,14 +1153,18 @@ int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type, u16 ro; attr = ni_find_attr(ni, NULL, NULL, type, name, name_len, &vcn, NULL); - if (!attr) + if (!attr) { + /* Is record corrupted? */ return -ENOENT; + } svcn = le64_to_cpu(attr->nres.svcn); evcn = le64_to_cpu(attr->nres.evcn); - if (evcn < vcn || vcn < svcn) + if (evcn < vcn || vcn < svcn) { + /* Is record corrupted? */ return -EINVAL; + } ro = le16_to_cpu(attr->nres.run_off); err = run_unpack_ex(run, ni->mi.sbi, ni->mi.rno, svcn, evcn, svcn, @@ -1171,7 +1175,7 @@ int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type, } /* - * attr_wof_load_runs_range - Load runs for given range [from to). + * attr_load_runs_range - Load runs for given range [from to). */ int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type, const __le16 *name, u8 name_len, struct runs_tree *run, @@ -1974,7 +1978,7 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size) total_size = le64_to_cpu(attr_b->nres.total_size); if (vbo >= alloc_size) { - // NOTE: It is allowed. + /* NOTE: It is allowed. */ return 0; } @@ -1986,9 +1990,9 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size) bytes -= vbo; if ((vbo & mask) || (bytes & mask)) { - /* We have to zero a range(s)*/ + /* We have to zero a range(s). */ if (frame_size == NULL) { - /* Caller insists range is aligned */ + /* Caller insists range is aligned. */ return -EINVAL; } *frame_size = mask + 1; diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c index 06ae38adb8ad..831501555009 100644 --- a/fs/ntfs3/bitmap.c +++ b/fs/ntfs3/bitmap.c @@ -29,7 +29,6 @@ struct rb_node_key { size_t key; }; -/* Tree is sorted by start (key). */ struct e_node { struct rb_node_key start; /* Tree sorted by start. */ struct rb_node_key count; /* Tree sorted by len. */ @@ -1117,7 +1116,7 @@ size_t wnd_find(struct wnd_bitmap *wnd, size_t to_alloc, size_t hint, sb = wnd->sb; log2_bits = sb->s_blocksize_bits + 3; - /* At most two ranges [hint, max_alloc) + [0, hint) */ + /* At most two ranges [hint, max_alloc) + [0, hint). */ Again: /* TODO: Optimize request for case nbits > wbits. */ @@ -1241,7 +1240,7 @@ size_t wnd_find(struct wnd_bitmap *wnd, size_t to_alloc, size_t hint, continue; } - /* Read window */ + /* Read window. */ bh = wnd_map(wnd, iw); if (IS_ERR(bh)) { // TODO: Error. diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c index 62ebfa324bff..89557d60a9b0 100644 --- a/fs/ntfs3/file.c +++ b/fs/ntfs3/file.c @@ -190,7 +190,8 @@ static int ntfs_extend_initialized_size(struct file *file, /* * ntfs_zero_range - Helper function for punch_hole. - * It zeroes a range [vbo, vbo_to) + * + * It zeroes a range [vbo, vbo_to). */ static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to) { @@ -231,12 +232,12 @@ static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to) if (!buffer_mapped(bh)) { ntfs_get_block(inode, iblock, bh, 0); - /* unmapped? It's a hole - nothing to do */ + /* Unmapped? It's a hole - nothing to do. */ if (!buffer_mapped(bh)) continue; } - /* Ok, it's mapped. Make sure it's up-to-date */ + /* Ok, it's mapped. Make sure it's up-to-date. */ if (PageUptodate(page)) set_buffer_uptodate(bh); @@ -272,9 +273,8 @@ static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to) } /* - * ntfs_sparse_cluster + * ntfs_sparse_cluster - Helper function to zero a new allocated clusters. * - * Helper function to zero a new allocated clusters * NOTE: 512 <= cluster size <= 2M */ void ntfs_sparse_cluster(struct inode *inode, struct page *page0, CLST vcn, @@ -588,7 +588,7 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len) truncate_pagecache(inode, vbo_down); if (!is_sparsed(ni) && !is_compressed(ni)) { - /* normal file */ + /* Normal file. */ err = ntfs_zero_range(inode, vbo, end); goto out; } @@ -599,7 +599,7 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len) if (err != E_NTFS_NOTALIGNED) goto out; - /* process not aligned punch */ + /* Process not aligned punch. */ mask = frame_size - 1; vbo_a = (vbo + mask) & ~mask; end_a = end & ~mask; @@ -647,7 +647,7 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len) if (err) goto out; - /* Wait for existing dio to complete */ + /* Wait for existing dio to complete. */ inode_dio_wait(inode); truncate_pagecache(inode, vbo_down); @@ -1127,7 +1127,7 @@ static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) goto out; if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { - /* Should never be here, see ntfs_file_open() */ + /* Should never be here, see ntfs_file_open(). */ ret = -EOPNOTSUPP; goto out; } diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c index 3f48b612ec96..938b12d56ca6 100644 --- a/fs/ntfs3/frecord.c +++ b/fs/ntfs3/frecord.c @@ -56,7 +56,7 @@ static struct mft_inode *ni_find_mi(struct ntfs_inode *ni, CLST rno) /* * ni_add_mi - Add new mft_inode into ntfs_inode. -*/ + */ static void ni_add_mi(struct ntfs_inode *ni, struct mft_inode *mi) { ni_ins_mi(ni, &ni->mi_tree, mi->rno, &mi->node); @@ -70,9 +70,8 @@ void ni_remove_mi(struct ntfs_inode *ni, struct mft_inode *mi) rb_erase(&mi->node, &ni->mi_tree); } -/* ni_std - * - * Return: Pointer into std_info from primary record. +/* + * ni_std - Return: Pointer into std_info from primary record. */ struct ATTR_STD_INFO *ni_std(struct ntfs_inode *ni) { @@ -385,7 +384,7 @@ bool ni_add_subrecord(struct ntfs_inode *ni, CLST rno, struct mft_inode **mi) /* * ni_remove_attr - Remove all attributes for the given type/name/id. -*/ + */ 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) @@ -740,7 +739,7 @@ static int ni_try_remove_attr_list(struct ntfs_inode *ni) /* * ni_create_attr_list - Generates an attribute list for this primary record. -*/ + */ int ni_create_attr_list(struct ntfs_inode *ni) { struct ntfs_sb_info *sbi = ni->mi.sbi; @@ -939,7 +938,7 @@ static int ni_ins_attr_ext(struct ntfs_inode *ni, struct ATTR_LIST_ENTRY *le, if (is_mft_data && (mi_enum_attr(mi, NULL) || vbo <= ((u64)mi->rno << sbi->record_bits))) { - /* We can't accept this record 'case MFT's bootstrapping. */ + /* We can't accept this record 'cause MFT's bootstrapping. */ continue; } if (is_mft && @@ -1078,7 +1077,7 @@ static int ni_insert_attr(struct ntfs_inode *ni, enum ATTR_TYPE type, */ max_free = free; - /* Estimate the result of moving all possible attributes away.*/ + /* Estimate the result of moving all possible attributes away. */ attr = NULL; while ((attr = mi_enum_attr(&ni->mi, attr))) { @@ -1095,7 +1094,7 @@ static int ni_insert_attr(struct ntfs_inode *ni, enum ATTR_TYPE type, goto out; } - /* Start real attribute moving */ + /* Start real attribute moving. */ attr = NULL; for (;;) { @@ -1542,7 +1541,7 @@ int ni_delete_all(struct ntfs_inode *ni) node = next; } - /* Free base record */ + /* Free base record. */ clear_rec_inuse(ni->mi.mrec); ni->mi.dirty = true; err = mi_write(&ni->mi, 0); @@ -2243,7 +2242,7 @@ int ni_decompress_file(struct ntfs_inode *ni) } if (attr->non_res && is_attr_sparsed(attr)) { - /* Sarsed attribute header is 8 bytes bigger than normal. */ + /* Sparsed attribute header is 8 bytes bigger than normal. */ struct MFT_REC *rec = mi->mrec; u32 used = le32_to_cpu(rec->used); u32 asize = le32_to_cpu(attr->size); @@ -2324,7 +2323,7 @@ static int decompress_lzx_xpress(struct ntfs_sb_info *sbi, const char *cmpr, mutex_lock(&sbi->compress.mtx_xpress); ctx = sbi->compress.xpress; if (!ctx) { - /* Lazy initialize Xpress decompress context */ + /* Lazy initialize Xpress decompress context. */ ctx = xpress_allocate_decompressor(); if (!ctx) { err = -ENOMEM; @@ -2348,7 +2347,7 @@ static int decompress_lzx_xpress(struct ntfs_sb_info *sbi, const char *cmpr, /* * ni_read_frame * - * Pages - array of locked pages. + * Pages - Array of locked pages. */ int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages, u32 pages_per_frame) @@ -2740,7 +2739,7 @@ int ni_write_frame(struct ntfs_inode *ni, struct page **pages, lznt = NULL; } - /* Compress: frame_mem -> frame_ondisk. */ + /* Compress: frame_mem -> frame_ondisk */ compr_size = compress_lznt(frame_mem, frame_size, frame_ondisk, frame_size, sbi->compress.lznt); mutex_unlock(&sbi->compress.mtx_lznt); diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c index 6f6057129fdd..b5853aed0e25 100644 --- a/fs/ntfs3/fslog.c +++ b/fs/ntfs3/fslog.c @@ -1362,7 +1362,8 @@ static void log_create(struct ntfs_log *log, u32 l_size, const u64 last_lsn, /* Compute the log page values. */ log->data_off = ALIGN( offsetof(struct RECORD_PAGE_HDR, fixups) + - sizeof(short) * ((log->page_size >> SECTOR_SHIFT) + 1), 8); + sizeof(short) * ((log->page_size >> SECTOR_SHIFT) + 1), + 8); log->data_size = log->page_size - log->data_off; log->record_header_len = sizeof(struct LFS_RECORD_HDR); @@ -1372,7 +1373,9 @@ static void log_create(struct ntfs_log *log, u32 l_size, const u64 last_lsn, /* Compute the restart page values. */ log->ra_off = ALIGN( offsetof(struct RESTART_HDR, fixups) + - sizeof(short) * ((log->sys_page_size >> SECTOR_SHIFT) + 1), 8); + sizeof(short) * + ((log->sys_page_size >> SECTOR_SHIFT) + 1), + 8); log->restart_size = log->sys_page_size - log->ra_off; log->ra_size = struct_size(log->ra, clients, 1); log->current_openlog_count = open_log_count; @@ -5132,8 +5135,8 @@ int log_replay(struct ntfs_inode *ni, bool *initialized) rh->sys_page_size = cpu_to_le32(log->page_size); rh->page_size = cpu_to_le32(log->page_size); - t16 = ALIGN(offsetof(struct RESTART_HDR, fixups) + - sizeof(short) * t16, 8); + t16 = ALIGN(offsetof(struct RESTART_HDR, fixups) + sizeof(short) * t16, + 8); rh->ra_off = cpu_to_le16(t16); rh->minor_ver = cpu_to_le16(1); // 0x1A: rh->major_ver = cpu_to_le16(1); // 0x1C: diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c index 669249439217..91e3743e1442 100644 --- a/fs/ntfs3/fsntfs.c +++ b/fs/ntfs3/fsntfs.c @@ -312,7 +312,7 @@ int ntfs_loadlog_and_replay(struct ntfs_inode *ni, struct ntfs_sb_info *sbi) if (sb_rdonly(sb) || !initialized) goto out; - /* Fill LogFile by '-1' if it is initialized.ssss */ + /* Fill LogFile by '-1' if it is initialized. */ err = ntfs_bio_fill_1(sbi, &ni->file.run); out: @@ -960,10 +960,10 @@ int ntfs_set_state(struct ntfs_sb_info *sbi, enum NTFS_DIRTY_FLAGS dirty) /* verify(!ntfs_update_mftmirr()); */ /* - * if we used wait=1, sync_inode_metadata waits for the io for the + * If we used wait=1, sync_inode_metadata waits for the io for the * inode to finish. It hangs when media is removed. * So wait=0 is sent down to sync_inode_metadata - * and filemap_fdatawrite is used for the data blocks + * and filemap_fdatawrite is used for the data blocks. */ err = sync_inode_metadata(&ni->vfs_inode, 0); if (!err) @@ -1917,7 +1917,7 @@ int ntfs_security_init(struct ntfs_sb_info *sbi) sbi->security.next_id = SECURITY_ID_FIRST; /* Always write new security at the end of bucket. */ sbi->security.next_off = - ALIGN(sds_size - SecurityDescriptorsBlockSize, 16); + ALIGN(sds_size - SecurityDescriptorsBlockSize, 16); off = 0; ne = NULL; diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c index 1224b8e42b3e..0daca9adc54c 100644 --- a/fs/ntfs3/index.c +++ b/fs/ntfs3/index.c @@ -2624,17 +2624,19 @@ int indx_update_dup(struct ntfs_inode *ni, struct ntfs_sb_info *sbi, e_fname = (struct ATTR_FILE_NAME *)(e + 1); if (!memcmp(&e_fname->dup, dup, sizeof(*dup))) { - /* Nothing to update in index! Try to avoid this call. */ + /* + * Nothing to update in index! Try to avoid this call. + */ goto out; } memcpy(&e_fname->dup, dup, sizeof(*dup)); if (fnd->level) { - /* directory entry in index */ + /* Directory entry in index. */ err = indx_write(indx, ni, fnd->nodes[fnd->level - 1], sync); } else { - /* directory entry in directory MFT record */ + /* Directory entry in directory MFT record. */ mi->dirty = true; if (sync) err = mi_write(mi, 1); diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index 8f72066b3229..db2a5a4c38e4 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -89,7 +89,7 @@ static struct inode *ntfs_read_mft(struct inode *inode, } if (le32_to_cpu(rec->total) != sbi->record_size) { - // Bad inode? + /* Bad inode? */ err = -EINVAL; goto out; } @@ -605,7 +605,7 @@ static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo, if (vbo >= valid) set_buffer_new(bh); } else if (create) { - /*normal write*/ + /* Normal write. */ if (bytes > bh->b_size) bytes = bh->b_size; @@ -1091,7 +1091,7 @@ int inode_write_data(struct inode *inode, const void *data, size_t bytes) /* * ntfs_reparse_bytes * - * Number of bytes to for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK) + * Number of bytes for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK) * for unicode string of @uni_len length. */ static inline u32 ntfs_reparse_bytes(u32 uni_len) @@ -1205,13 +1205,13 @@ struct inode *ntfs_create_inode(struct user_namespace *mnt_userns, return ERR_PTR(-EINVAL); if (S_ISDIR(mode)) { - /* use parent's directory attributes */ + /* Use parent's directory attributes. */ fa = dir_ni->std_fa | FILE_ATTRIBUTE_DIRECTORY | FILE_ATTRIBUTE_ARCHIVE; /* - * By default child directory inherits parent attributes - * root directory is hidden + system - * Make an exception for children in root + * By default child directory inherits parent attributes. + * Root directory is hidden + system. + * Make an exception for children in root. */ if (dir->i_ino == MFT_REC_ROOT) fa &= ~(FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM); @@ -1220,8 +1220,8 @@ struct inode *ntfs_create_inode(struct user_namespace *mnt_userns, fa = FILE_ATTRIBUTE_REPARSE_POINT; /* - * linux: there are dir/file/symlink and so on. - * NTFS: symlinks are "dir + reparse" or "file + reparse". + * Linux: there are dir/file/symlink and so on. + * NTFS: symlinks are "dir + reparse" or "file + reparse" * It is good idea to create: * dir + reparse if 'symname' points to directory * or @@ -1860,7 +1860,7 @@ static noinline int ntfs_readlink_hlp(struct inode *inode, char *buffer, default: if (IsReparseTagMicrosoft(rp->ReparseTag)) { - /* unknown Microsoft Tag */ + /* Unknown Microsoft Tag. */ goto out; } if (!IsReparseTagNameSurrogate(rp->ReparseTag) || diff --git a/fs/ntfs3/lznt.c b/fs/ntfs3/lznt.c index 3acf0d9f0b15..f1f691a67cc4 100644 --- a/fs/ntfs3/lznt.c +++ b/fs/ntfs3/lznt.c @@ -296,8 +296,9 @@ static inline ssize_t decompress_chunk(u8 *unc, u8 *unc_end, const u8 *cmpr, */ struct lznt *get_lznt_ctx(int level) { - struct lznt *r = kzalloc(level ? offsetof(struct lznt, hash) : - sizeof(struct lznt), GFP_NOFS); + struct lznt *r = kzalloc(level ? offsetof(struct lznt, hash) + : sizeof(struct lznt), + GFP_NOFS); if (r) r->std = !level; diff --git a/fs/ntfs3/ntfs.h b/fs/ntfs3/ntfs.h index 0fd7bffb98d4..6bb3e595263b 100644 --- a/fs/ntfs3/ntfs.h +++ b/fs/ntfs3/ntfs.h @@ -262,7 +262,7 @@ enum RECORD_FLAG { RECORD_FLAG_UNKNOWN = cpu_to_le16(0x0008), }; -/* MFT Record structure, */ +/* MFT Record structure. */ struct MFT_REC { struct NTFS_RECORD_HEADER rhdr; // 'FILE' diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h index f9436cbbc347..97e682ebcfb9 100644 --- a/fs/ntfs3/ntfs_fs.h +++ b/fs/ntfs3/ntfs_fs.h @@ -59,18 +59,18 @@ struct ntfs_mount_options { 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. */ + 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. */ ; }; diff --git a/fs/ntfs3/record.c b/fs/ntfs3/record.c index 61e3f2fb619f..103705c86772 100644 --- a/fs/ntfs3/record.c +++ b/fs/ntfs3/record.c @@ -219,7 +219,7 @@ struct ATTRIB *mi_enum_attr(struct mft_inode *mi, struct ATTRIB *attr) asize = le32_to_cpu(attr->size); if (asize < SIZEOF_RESIDENT) { - /* Impossible 'cause we should not return such attribute */ + /* Impossible 'cause we should not return such attribute. */ return NULL; } diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index 2fbab8a931ee..dbecf095da59 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -1053,7 +1053,7 @@ static int ntfs_fill_super(struct super_block *sb, void *data, int silent) iput(inode); - /* Load $LogFile to replay. */ + /* Load LogFile to replay. */ ref.low = cpu_to_le32(MFT_REC_LOG); ref.seq = cpu_to_le16(MFT_REC_LOG); inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE); diff --git a/fs/ntfs3/upcase.c b/fs/ntfs3/upcase.c index eb65bbd939e8..bbeba778237e 100644 --- a/fs/ntfs3/upcase.c +++ b/fs/ntfs3/upcase.c @@ -34,7 +34,7 @@ static inline u16 upcase_unicode_char(const u16 *upcase, u16 chr) * - Case insensitive * - If name equals and 'bothcases' then * - Case sensitive - * 'Straigth way' code scans input names twice in worst case. + * 'Straight way' code scans input names twice in worst case. * Optimized code scans input names only once. */ int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2, diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c index 22fd5eb32c5b..b15d532e4a17 100644 --- a/fs/ntfs3/xattr.c +++ b/fs/ntfs3/xattr.c @@ -26,9 +26,10 @@ 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); + : 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) -- 2.30.0

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[PATCH OLK-5.10 026/107] fs/ntfs3: Fix error handling in indx_insert_into_root()
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Dan Carpenter <dan.carpenter(a)oracle.com> mainline inclusion from mainline-v5.15 commit b8155e95de38b25a69dfb03e4731fd6c5a28531e category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- There are three bugs in this code: 1) If indx_get_root() fails, then return -EINVAL instead of success. 2) On the "/* make root external */" -EOPNOTSUPP; error path it should free "re" but it has a memory leak. 3) If indx_new() fails then it will lead to an error pointer dereference when we call put_indx_node(). I've re-written the error handling to be more clear. Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> Reviewed-by: Kari Argillander <kari.argillander(a)gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/index.c | 36 ++++++++++++++++-------------------- 1 file changed, 16 insertions(+), 20 deletions(-) diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c index f4729aa50671..69c6c4e0b4d9 100644 --- a/fs/ntfs3/index.c +++ b/fs/ntfs3/index.c @@ -1555,12 +1555,12 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, u32 root_size, new_root_size; struct ntfs_sb_info *sbi; int ds_root; - struct INDEX_ROOT *root, *a_root = NULL; + struct INDEX_ROOT *root, *a_root; /* Get the record this root placed in */ root = indx_get_root(indx, ni, &attr, &mi); if (!root) - goto out; + return -EINVAL; /* * Try easy case: @@ -1592,10 +1592,8 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, /* Make a copy of root attribute to restore if error */ a_root = kmemdup(attr, asize, GFP_NOFS); - if (!a_root) { - err = -ENOMEM; - goto out; - } + if (!a_root) + return -ENOMEM; /* copy all the non-end entries from the index root to the new buffer.*/ to_move = 0; @@ -1605,7 +1603,7 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, for (e = e0;; e = hdr_next_de(hdr, e)) { if (!e) { err = -EINVAL; - goto out; + goto out_free_root; } if (de_is_last(e)) @@ -1613,14 +1611,13 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, to_move += le16_to_cpu(e->size); } - n = NULL; if (!to_move) { re = NULL; } else { re = kmemdup(e0, to_move, GFP_NOFS); if (!re) { err = -ENOMEM; - goto out; + goto out_free_root; } } @@ -1637,7 +1634,7 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, if (ds_root > 0 && used + ds_root > sbi->max_bytes_per_attr) { /* make root external */ err = -EOPNOTSUPP; - goto out; + goto out_free_re; } if (ds_root) @@ -1667,7 +1664,7 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, /* bug? */ ntfs_set_state(sbi, NTFS_DIRTY_ERROR); err = -EINVAL; - goto out1; + goto out_free_re; } if (err) { @@ -1678,7 +1675,7 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, /* bug? */ ntfs_set_state(sbi, NTFS_DIRTY_ERROR); } - goto out1; + goto out_free_re; } e = (struct NTFS_DE *)(root + 1); @@ -1689,7 +1686,7 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, n = indx_new(indx, ni, new_vbn, sub_vbn); if (IS_ERR(n)) { err = PTR_ERR(n); - goto out1; + goto out_free_re; } hdr = &n->index->ihdr; @@ -1716,7 +1713,7 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, put_indx_node(n); fnd_clear(fnd); err = indx_insert_entry(indx, ni, new_de, ctx, fnd); - goto out; + goto out_free_root; } /* @@ -1726,7 +1723,7 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, e = hdr_insert_de(indx, hdr, new_de, NULL, ctx); if (!e) { err = -EINVAL; - goto out1; + goto out_put_n; } fnd_push(fnd, n, e); @@ -1735,12 +1732,11 @@ static int indx_insert_into_root(struct ntfs_index *indx, struct ntfs_inode *ni, n = NULL; -out1: +out_put_n: + put_indx_node(n); +out_free_re: kfree(re); - if (n) - put_indx_node(n); - -out: +out_free_root: kfree(a_root); return err; } -- 2.30.0

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[PATCH OLK-5.10 025/107] fs/ntfs3: Potential NULL dereference in hdr_find_split()
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Dan Carpenter <dan.carpenter(a)oracle.com> mainline inclusion from mainline-v5.15 commit 8c83a4851da1c7eda83098ade238665b15774da3 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- The "e" pointer is dereferenced before it has been checked for NULL. Move the dereference after the NULL check to prevent an Oops. Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> Reviewed-by: Kari Argillander <kari.argillander(a)gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/index.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c index 5fb41c9c8910..f4729aa50671 100644 --- a/fs/ntfs3/index.c +++ b/fs/ntfs3/index.c @@ -557,11 +557,12 @@ static const struct NTFS_DE *hdr_find_split(const struct INDEX_HDR *hdr) size_t o; const struct NTFS_DE *e = hdr_first_de(hdr); u32 used_2 = le32_to_cpu(hdr->used) >> 1; - u16 esize = le16_to_cpu(e->size); + u16 esize; if (!e || de_is_last(e)) return NULL; + esize = le16_to_cpu(e->size); for (o = le32_to_cpu(hdr->de_off) + esize; o < used_2; o += esize) { const struct NTFS_DE *p = e; -- 2.30.0

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[PATCH OLK-5.10 024/107] fs/ntfs3: Fix error code in indx_add_allocate()
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Dan Carpenter <dan.carpenter(a)oracle.com> mainline inclusion from mainline-v5.15 commit 04810f000afdbdd37825ca7f563f036119422cb7 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- Return -EINVAL if ni_find_attr() fails. Don't return success. Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> Reviewed-by: Kari Argillander <kari.argillander(a)gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/index.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c index 334a3cef714b..5fb41c9c8910 100644 --- a/fs/ntfs3/index.c +++ b/fs/ntfs3/index.c @@ -1500,6 +1500,7 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni, alloc = ni_find_attr(ni, NULL, NULL, ATTR_ALLOC, in->name, in->name_len, NULL, &mi); if (!alloc) { + err = -EINVAL; if (bmp) goto out2; goto out1; -- 2.30.0

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[PATCH OLK-5.10 023/107] fs/ntfs3: fix an error code in ntfs_get_acl_ex()
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Dan Carpenter <dan.carpenter(a)oracle.com> mainline inclusion from mainline-v5.15 commit 2926e4297053c735ab65450192dfba32a4f47fa9 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- The ntfs_get_ea() function returns negative error codes or on success it returns the length. In the original code a zero length return was treated as -ENODATA and results in a NULL return. But it should be treated as an invalid length and result in an PTR_ERR(-EINVAL) return. Fixes: be71b5cba2e6 ("fs/ntfs3: Add attrib operations") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/xattr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c index af89e50f7b9f..d3d5b9d331d1 100644 --- a/fs/ntfs3/xattr.c +++ b/fs/ntfs3/xattr.c @@ -521,7 +521,7 @@ static struct posix_acl *ntfs_get_acl_ex(struct user_namespace *mnt_userns, ni_unlock(ni); /* Translate extended attribute to acl */ - if (err > 0) { + if (err >= 0) { acl = posix_acl_from_xattr(mnt_userns, buf, err); if (!IS_ERR(acl)) set_cached_acl(inode, type, acl); -- 2.30.0

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[PATCH OLK-5.10 022/107] fs/ntfs3: add checks for allocation failure
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Dan Carpenter <dan.carpenter(a)oracle.com> mainline inclusion from mainline-v5.15 commit a1b04d380ab64790a7b4a8eb52e14679e47065ab category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- Add a check for when the kzalloc() in init_rsttbl() fails. Some of the callers checked for NULL and some did not. I went down the call tree and added NULL checks where ever they were missing. Fixes: b46acd6a6a62 ("fs/ntfs3: Add NTFS journal") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> Reviewed-by: Kari Argillander <kari.argillander(a)gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/fslog.c | 18 ++++++++++++++++-- 1 file changed, 16 insertions(+), 2 deletions(-) diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c index 2c213b55979e..7144ea8a9ab8 100644 --- a/fs/ntfs3/fslog.c +++ b/fs/ntfs3/fslog.c @@ -809,6 +809,9 @@ static inline struct RESTART_TABLE *init_rsttbl(u16 esize, u16 used) u32 lf = sizeof(struct RESTART_TABLE) + (used - 1) * esize; struct RESTART_TABLE *t = kzalloc(bytes, GFP_NOFS); + if (!t) + return NULL; + t->size = cpu_to_le16(esize); t->used = cpu_to_le16(used); t->free_goal = cpu_to_le32(~0u); @@ -831,7 +834,11 @@ static inline struct RESTART_TABLE *extend_rsttbl(struct RESTART_TABLE *tbl, u16 esize = le16_to_cpu(tbl->size); __le32 osize = cpu_to_le32(bytes_per_rt(tbl)); u32 used = le16_to_cpu(tbl->used); - struct RESTART_TABLE *rt = init_rsttbl(esize, used + add); + struct RESTART_TABLE *rt; + + rt = init_rsttbl(esize, used + add); + if (!rt) + return NULL; memcpy(rt + 1, tbl + 1, esize * used); @@ -864,8 +871,11 @@ static inline void *alloc_rsttbl_idx(struct RESTART_TABLE **tbl) __le32 *e; struct RESTART_TABLE *t = *tbl; - if (!t->first_free) + if (!t->first_free) { *tbl = t = extend_rsttbl(t, 16, ~0u); + if (!t) + return NULL; + } off = le32_to_cpu(t->first_free); @@ -4482,6 +4492,10 @@ int log_replay(struct ntfs_inode *ni, bool *initialized) } dp = alloc_rsttbl_idx(&dptbl); + if (!dp) { + err = -ENOMEM; + goto out; + } dp->target_attr = cpu_to_le32(t16); dp->transfer_len = cpu_to_le32(t32 << sbi->cluster_bits); dp->lcns_follow = cpu_to_le32(t32); -- 2.30.0

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[PATCH OLK-5.10 021/107] fs/ntfs3: Use kcalloc/kmalloc_array over kzalloc/kmalloc
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Kari Argillander <kari.argillander(a)gmail.com> mainline inclusion from mainline-v5.15 commit 345482bc431f6492beb464696341626057f67771 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- Use kcalloc/kmalloc_array over kzalloc/kmalloc when we allocate array. Checkpatch found these after we did not use our own defined allocation wrappers. Reviewed-by: Christoph Hellwig <hch(a)lst.de> Signed-off-by: Kari Argillander <kari.argillander(a)gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/bitmap.c | 2 +- fs/ntfs3/file.c | 2 +- fs/ntfs3/frecord.c | 7 +++---- 3 files changed, 5 insertions(+), 6 deletions(-) diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c index d502bba323d0..2de05062c78b 100644 --- a/fs/ntfs3/bitmap.c +++ b/fs/ntfs3/bitmap.c @@ -683,7 +683,7 @@ int wnd_init(struct wnd_bitmap *wnd, struct super_block *sb, size_t nbits) if (!wnd->bits_last) wnd->bits_last = wbits; - wnd->free_bits = kzalloc(wnd->nwnd * sizeof(u16), GFP_NOFS); + wnd->free_bits = kcalloc(wnd->nwnd, sizeof(u16), GFP_NOFS); if (!wnd->free_bits) return -ENOMEM; diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c index 8d27c520bec5..a959f6197c99 100644 --- a/fs/ntfs3/file.c +++ b/fs/ntfs3/file.c @@ -900,7 +900,7 @@ static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from) return -EOPNOTSUPP; } - pages = kmalloc(pages_per_frame * sizeof(struct page *), GFP_NOFS); + pages = kmalloc_array(pages_per_frame, sizeof(struct page *), GFP_NOFS); if (!pages) return -ENOMEM; diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c index 2f7d16543530..329bc76dfb09 100644 --- a/fs/ntfs3/frecord.c +++ b/fs/ntfs3/frecord.c @@ -2054,7 +2054,7 @@ int ni_readpage_cmpr(struct ntfs_inode *ni, struct page *page) idx = (vbo - frame_vbo) >> PAGE_SHIFT; pages_per_frame = frame_size >> PAGE_SHIFT; - pages = kzalloc(pages_per_frame * sizeof(struct page *), GFP_NOFS); + pages = kcalloc(pages_per_frame, sizeof(struct page *), GFP_NOFS); if (!pages) { err = -ENOMEM; goto out; @@ -2137,7 +2137,7 @@ int ni_decompress_file(struct ntfs_inode *ni) frame_bits = ni_ext_compress_bits(ni); frame_size = 1u << frame_bits; pages_per_frame = frame_size >> PAGE_SHIFT; - pages = kzalloc(pages_per_frame * sizeof(struct page *), GFP_NOFS); + pages = kcalloc(pages_per_frame, sizeof(struct page *), GFP_NOFS); if (!pages) { err = -ENOMEM; goto out; @@ -2709,8 +2709,7 @@ int ni_write_frame(struct ntfs_inode *ni, struct page **pages, goto out; } - pages_disk = kzalloc(pages_per_frame * sizeof(struct page *), - GFP_NOFS); + pages_disk = kcalloc(pages_per_frame, sizeof(struct page *), GFP_NOFS); if (!pages_disk) { err = -ENOMEM; goto out; -- 2.30.0

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[PATCH OLK-5.10 017/107] fs/ntfs3: Remove unused including <linux/version.h>
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Jiapeng Chong <jiapeng.chong(a)linux.alibaba.com> mainline inclusion from mainline-v5.15 commit 1263eddfea9988125a4b9608efecc8aff2c721f9 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- Eliminate the follow versioncheck warning: ./fs/ntfs3/inode.c: 16 linux/version.h not needed. Reported-by: Abaci Robot <abaci(a)linux.alibaba.com> Fixes: 82cae269cfa9 ("fs/ntfs3: Add initialization of super block") Signed-off-by: Jiapeng Chong <jiapeng.chong(a)linux.alibaba.com> Reviewed-by: Kari Argillander <kari.argillander(a)gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/inode.c | 1 - 1 file changed, 1 deletion(-) diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index a573c6e98cb8..ed64489edf73 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -13,7 +13,6 @@ #include <linux/namei.h> #include <linux/nls.h> #include <linux/uio.h> -#include <linux/version.h> #include <linux/writeback.h> #include "debug.h" -- 2.30.0

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[PATCH OLK-5.10 016/107] fs/ntfs3: Fix fall-through warnings for Clang
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: "Gustavo A. R. Silva" <gustavoars(a)kernel.org> mainline inclusion from mainline-v5.15 commit abfeb2ee2103f07dd93b9d7b32317e26d1c8ef79 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- Fix the following fallthrough warnings: fs/ntfs3/inode.c:1792:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/ntfs3/index.c:178:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] This helps with the ongoing efforts to globally enable -Wimplicit-fallthrough for Clang. Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva <gustavoars(a)kernel.org> Reviewed-by: Nathan Chancellor <nathan(a)kernel.org> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/index.c | 1 + fs/ntfs3/inode.c | 1 + 2 files changed, 2 insertions(+) diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c index 9386c551e208..189d46e2c38d 100644 --- a/fs/ntfs3/index.c +++ b/fs/ntfs3/index.c @@ -175,6 +175,7 @@ static inline NTFS_CMP_FUNC get_cmp_func(const struct INDEX_ROOT *root) default: break; } + break; default: break; } diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index bf51e294432e..a573c6e98cb8 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -1789,6 +1789,7 @@ int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry) switch (err) { case 0: drop_nlink(inode); + break; case -ENOTEMPTY: case -ENOSPC: case -EROFS: -- 2.30.0

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[PATCH OLK-5.10 015/107] fs/ntfs3: Fix one none utf8 char in source file
by Yin Xiujiang 08 Dec '21

08 Dec '21

From: Kari Argillander <kari.argillander(a)gmail.com> mainline inclusion from mainline-v5.15 commit be87e821fdb5ec8c6d404f29e118130c7879ce5b category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I4G67J?from=project-issue CVE: NA ---------------------------------------------------------------------- In one source file there is for some reason non utf8 char. But hey this is fs development so this kind of thing might happen. Signed-off-by: Kari Argillander <kari.argillander(a)gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich(a)paragon-software.com> Signed-off-by: Yin Xiujiang <yinxiujiang(a)kylinos.cn> --- fs/ntfs3/frecord.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c index c3121bf9c62f..e377d72477df 100644 --- a/fs/ntfs3/frecord.c +++ b/fs/ntfs3/frecord.c @@ -1784,7 +1784,7 @@ enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr, /* * WOF - Windows Overlay Filter - used to compress files with lzx/xpress * Unlike native NTFS file compression, the Windows Overlay Filter supports - * only read operations. This means that it doesn�t need to sector-align each + * only read operations. This means that it doesn't need to sector-align each * compressed chunk, so the compressed data can be packed more tightly together. * If you open the file for writing, the Windows Overlay Filter just decompresses * the entire file, turning it back into a plain file. -- 2.30.0

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