hfsplus: emit proper file type from readdir

hfsplus_readdir() incorrectly returned DT_REG for symbolic links and
special files.  Return DT_REG, DT_LNK, DT_FIFO, DT_CHR, DT_BLK, DT_SOCK,
or DT_UNKNOWN according to mode field in catalog record.  Programs
relying on information from readdir will now work correctly with HFS+.

Signed-off-by: Sergei Antonov <saproj@gmail.com>
Cc: Anton Altaparmakov <aia21@cam.ac.uk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Vyacheslav Dubeyko <slava@dubeyko.com>
Cc: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 19 insertions, 1 deletions

diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c
index fb07d260e692..610a3260bef1 100644
--- a/fs/hfsplus/dir.c
+++ b/fs/hfsplus/dir.c
@@ -218,13 +218,31 @@ static int hfsplus_readdir(struct file *file, struct dir_context *ctx)
                                     be32_to_cpu(entry.folder.id), DT_DIR))
                                 break;
                 } else if (type == HFSPLUS_FILE) {
+                        u16 mode;
+                        unsigned type = DT_UNKNOWN;
+
                         if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
                                 pr_err("small file entry\n");
                                 err = -EIO;
                                 goto out;
                         }
+
+                        mode = be16_to_cpu(entry.file.permissions.mode);
+                        if (S_ISREG(mode))
+                                type = DT_REG;
+                        else if (S_ISLNK(mode))
+                                type = DT_LNK;
+                        else if (S_ISFIFO(mode))
+                                type = DT_FIFO;
+                        else if (S_ISCHR(mode))
+                                type = DT_CHR;
+                        else if (S_ISBLK(mode))
+                                type = DT_BLK;
+                        else if (S_ISSOCK(mode))
+                                type = DT_SOCK;
+
                         if (!dir_emit(ctx, strbuf, len,
-                                    be32_to_cpu(entry.file.id), DT_REG))
+                                      be32_to_cpu(entry.file.id), type))
                                 break;
                 } else {
                         pr_err("bad catalog entry type\n");