From 54033c135061b52d4405facba2e49177a5716a31 Mon Sep 17 00:00:00 2001 From: Konstantin Komarov Date: Wed, 6 Jul 2022 20:01:11 +0300 Subject: [PATCH] fs/ntfs3: Added comments to frecord functions Added some comments in frecord.c for more context. Also changed run_lookup to static because it's an internal function. Signed-off-by: Konstantin Komarov --- fs/ntfs3/bitmap.c | 3 +-- fs/ntfs3/frecord.c | 8 ++++---- fs/ntfs3/ntfs_fs.h | 1 - fs/ntfs3/run.c | 2 +- 4 files changed, 6 insertions(+), 8 deletions(-) diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c index e3b5680..bb9ebb1 100644 --- a/fs/ntfs3/bitmap.c +++ b/fs/ntfs3/bitmap.c @@ -1393,9 +1393,8 @@ 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) { - size_t zlen; + size_t zlen = wnd->zone_end - wnd->zone_bit; - zlen = wnd->zone_end - wnd->zone_bit; if (zlen) wnd_add_free_ext(wnd, wnd->zone_bit, zlen, false); diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c index acd9f44..bc48923 100644 --- a/fs/ntfs3/frecord.c +++ b/fs/ntfs3/frecord.c @@ -1287,7 +1287,7 @@ static int ni_expand_mft_list(struct ntfs_inode *ni) done = asize - run_size - SIZEOF_NONRESIDENT; le32_sub_cpu(&ni->mi.mrec->used, done); - /* Estimate the size of second part: run_buf=NULL. */ + /* Estimate packed size (run_buf=NULL). */ err = run_pack(run, svcn, evcn + 1 - svcn, NULL, sbi->record_size, &plen); if (err < 0) @@ -1317,6 +1317,7 @@ static int ni_expand_mft_list(struct ntfs_inode *ni) attr->name_off = SIZEOF_NONRESIDENT_LE; attr->flags = 0; + /* This function can't fail - cause already checked above. */ run_pack(run, svcn, evcn + 1 - svcn, Add2Ptr(attr, SIZEOF_NONRESIDENT), run_size, &plen); @@ -1392,8 +1393,6 @@ int ni_expand_list(struct ntfs_inode *ni) /* Split MFT data as much as possible. */ err = ni_expand_mft_list(ni); - if (err) - goto out; out: return !err && !done ? -EOPNOTSUPP : err; @@ -1419,6 +1418,7 @@ int ni_insert_nonresident(struct ntfs_inode *ni, enum ATTR_TYPE type, u32 run_size, asize; struct ntfs_sb_info *sbi = ni->mi.sbi; + /* Estimate packed size (run_buf=NULL). */ err = run_pack(run, svcn, len, NULL, sbi->max_bytes_per_attr - run_off, &plen); if (err < 0) @@ -1448,12 +1448,12 @@ int ni_insert_nonresident(struct ntfs_inode *ni, enum ATTR_TYPE type, attr->name_off = cpu_to_le16(name_off); attr->flags = flags; + /* This function can't fail - cause already checked above. */ run_pack(run, svcn, len, Add2Ptr(attr, run_off), run_size, &plen); attr->nres.svcn = cpu_to_le64(svcn); attr->nres.evcn = cpu_to_le64((u64)svcn + len - 1); - err = 0; if (new_attr) *new_attr = attr; diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h index 83ed27b..7a728d3 100644 --- a/fs/ntfs3/ntfs_fs.h +++ b/fs/ntfs3/ntfs_fs.h @@ -773,7 +773,6 @@ bool run_lookup_entry(const struct runs_tree *run, CLST vcn, CLST *lcn, 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); diff --git a/fs/ntfs3/run.c b/fs/ntfs3/run.c index aba8ab1..4168b8a 100644 --- a/fs/ntfs3/run.c +++ b/fs/ntfs3/run.c @@ -31,7 +31,7 @@ struct ntfs_run { * Case of entry missing from list 'index' will be set to * point to insertion position for the entry question. */ -bool run_lookup(const struct runs_tree *run, CLST vcn, size_t *index) +static bool run_lookup(const struct runs_tree *run, CLST vcn, size_t *index) { size_t min_idx, max_idx, mid_idx; struct ntfs_run *r; -- 2.7.4