5.15-stable review patch. If anyone has any objections, please let me know.
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From: Konstantin Komarov almaz.alexandrovich@paragon-software.com
[ Upstream commit 744375343662058cbfda96d871786e5a5cbe1947 ]
Mark ntfs dirty in this case. Rename ntfs_filldir to ntfs_dir_emit.
Signed-off-by: Konstantin Komarov almaz.alexandrovich@paragon-software.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ntfs3/dir.c | 52 +++++++++++++++++++++++++++++++------------------- 1 file changed, 32 insertions(+), 20 deletions(-)
diff --git a/fs/ntfs3/dir.c b/fs/ntfs3/dir.c index dcd689ed4baa..a4ab0164d150 100644 --- a/fs/ntfs3/dir.c +++ b/fs/ntfs3/dir.c @@ -272,9 +272,12 @@ struct inode *dir_search_u(struct inode *dir, const struct cpu_str *uni, return err == -ENOENT ? NULL : err ? ERR_PTR(err) : inode; }
-static inline int ntfs_filldir(struct ntfs_sb_info *sbi, struct ntfs_inode *ni, - const struct NTFS_DE *e, u8 *name, - struct dir_context *ctx) +/* + * returns false if 'ctx' if full + */ +static inline bool ntfs_dir_emit(struct ntfs_sb_info *sbi, + struct ntfs_inode *ni, const struct NTFS_DE *e, + u8 *name, struct dir_context *ctx) { const struct ATTR_FILE_NAME *fname; unsigned long ino; @@ -284,29 +287,29 @@ static inline int ntfs_filldir(struct ntfs_sb_info *sbi, struct ntfs_inode *ni, fname = Add2Ptr(e, sizeof(struct NTFS_DE));
if (fname->type == FILE_NAME_DOS) - return 0; + return true;
if (!mi_is_ref(&ni->mi, &fname->home)) - return 0; + return true;
ino = ino_get(&e->ref);
if (ino == MFT_REC_ROOT) - return 0; + return true;
/* Skip meta files. Unless option to show metafiles is set. */ if (!sbi->options->showmeta && ntfs_is_meta_file(sbi, ino)) - return 0; + return true;
if (sbi->options->nohidden && (fname->dup.fa & FILE_ATTRIBUTE_HIDDEN)) - return 0; + return true;
name_len = ntfs_utf16_to_nls(sbi, fname->name, fname->name_len, name, PATH_MAX); if (name_len <= 0) { ntfs_warn(sbi->sb, "failed to convert name for inode %lx.", ino); - return 0; + return true; }
/* @@ -336,17 +339,20 @@ static inline int ntfs_filldir(struct ntfs_sb_info *sbi, struct ntfs_inode *ni, } }
- return !dir_emit(ctx, (s8 *)name, name_len, ino, dt_type); + return dir_emit(ctx, (s8 *)name, name_len, ino, dt_type); }
/* * ntfs_read_hdr - Helper function for ntfs_readdir(). + * + * returns 0 if ok. + * returns -EINVAL if directory is corrupted. + * returns +1 if 'ctx' is full. */ static int ntfs_read_hdr(struct ntfs_sb_info *sbi, struct ntfs_inode *ni, const struct INDEX_HDR *hdr, u64 vbo, u64 pos, u8 *name, struct dir_context *ctx) { - int err; const struct NTFS_DE *e; u32 e_size; u32 end = le32_to_cpu(hdr->used); @@ -354,12 +360,12 @@ static int ntfs_read_hdr(struct ntfs_sb_info *sbi, struct ntfs_inode *ni,
for (;; off += e_size) { if (off + sizeof(struct NTFS_DE) > end) - return -1; + return -EINVAL;
e = Add2Ptr(hdr, off); e_size = le16_to_cpu(e->size); if (e_size < sizeof(struct NTFS_DE) || off + e_size > end) - return -1; + return -EINVAL;
if (de_is_last(e)) return 0; @@ -369,14 +375,15 @@ static int ntfs_read_hdr(struct ntfs_sb_info *sbi, struct ntfs_inode *ni, continue;
if (le16_to_cpu(e->key_size) < SIZEOF_ATTRIBUTE_FILENAME) - return -1; + return -EINVAL;
ctx->pos = vbo + off;
/* Submit the name to the filldir callback. */ - err = ntfs_filldir(sbi, ni, e, name, ctx); - if (err) - return err; + if (!ntfs_dir_emit(sbi, ni, e, name, ctx)) { + /* ctx is full. */ + return +1; + } } }
@@ -475,8 +482,6 @@ static int ntfs_readdir(struct file *file, struct dir_context *ctx)
vbo = (u64)bit << index_bits; if (vbo >= i_size) { - ntfs_inode_err(dir, "Looks like your dir is corrupt"); - ctx->pos = eod; err = -EINVAL; goto out; } @@ -499,9 +504,16 @@ static int ntfs_readdir(struct file *file, struct dir_context *ctx) __putname(name); put_indx_node(node);
- if (err == -ENOENT) { + if (err == 1) { + /* 'ctx' is full. */ + err = 0; + } else if (err == -ENOENT) { err = 0; ctx->pos = pos; + } else if (err < 0) { + if (err == -EINVAL) + ntfs_inode_err(dir, "directory corrupted"); + ctx->pos = eod; }
return err;