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fs/ntfs3: Fix directory element type detection

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[ Upstream commit 85a4780dc9 ]

Calling stat() from userspace correctly identified junctions in an NTFS
partition as symlinks, but using readdir() and iterating through the
directory containing the same junction did not identify the junction
as a symlink.

When emitting directory contents, check FILE_ATTRIBUTE_REPARSE_POINT
attribute to detect junctions and report them as links.

Signed-off-by: Gabriel Marcano <gabemarcano@yahoo.com>
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Gabriel Marcano 2023-09-12 21:50:32 -07:00 committed by Greg Kroah-Hartman
parent 94524980ee
commit 27a0bed128
1 changed files with 5 additions and 1 deletions
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6
fs/ntfs3/dir.c
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@ -309,7 +309,11 @@ static inline int ntfs_filldir(struct ntfs_sb_info *sbi, struct ntfs_inode *ni,
return 0;
}
dt_type = (fname->dup.fa & FILE_ATTRIBUTE_DIRECTORY) ? DT_DIR : DT_REG;
/* NTFS: symlinks are "dir + reparse" or "file + reparse" */
if (fname->dup.fa & FILE_ATTRIBUTE_REPARSE_POINT)
dt_type = DT_LNK;
else
dt_type = (fname->dup.fa & FILE_ATTRIBUTE_DIRECTORY) ? DT_DIR : DT_REG;
return !dir_emit(ctx, (s8 *)name, name_len, ino, dt_type);
}