| Message ID | 4E4B888D.6070904@jp.fujitsu.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c > index 15fceef..9c1297b 100644 > --- a/fs/btrfs/inode.c > +++ b/fs/btrfs/inode.c > @@ -4125,7 +4125,8 @@ static int btrfs_real_readdir(struct file *filp, void *dirent, > > /* special case for "." */ > if (filp->f_pos == 0) { > - over = filldir(dirent, ".", 1, 1, btrfs_ino(inode), DT_DIR); > + over = filldir(dirent, ".", 1, > + filp->f_pos, inode->i_ino, DT_DIR); please stick to btrfs_ino(). > if (over) > return 0; > filp->f_pos = 1; -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 15fceef..9c1297b 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4125,7 +4125,8 @@ static int btrfs_real_readdir(struct file *filp, void *dirent, /* special case for "." */ if (filp->f_pos == 0) { - over = filldir(dirent, ".", 1, 1, btrfs_ino(inode), DT_DIR); + over = filldir(dirent, ".", 1, + filp->f_pos, inode->i_ino, DT_DIR); if (over) return 0; filp->f_pos = 1; @@ -4134,7 +4135,7 @@ static int btrfs_real_readdir(struct file *filp, void *dirent, if (filp->f_pos == 1) { u64 pino = parent_ino(filp->f_path.dentry); over = filldir(dirent, "..", 2, - 2, pino, DT_DIR); + filp->f_pos, pino, DT_DIR); if (over) return 0; filp->f_pos = 2;
Since the d_off in the first dirent for "." (that originates from the 4th argument "offset" of filldir() for the 2nd dirent for "..") is wrongly assigned in btrfs_real_readdir(), telldir returns same offset for different locations. | # mkfs.btrfs /dev/sdb1 | # mount /dev/sdb1 fs0 | # cd fs0 | # touch file0 file1 | # ../test | telldir: 0 | readdir: d_off = 2, d_name = "." | telldir: 2 | readdir: d_off = 2, d_name = ".." | telldir: 2 | readdir: d_off = 3, d_name = "file0" | telldir: 3 | readdir: d_off = 2147483647, d_name = "file1" | telldir: 2147483647 To fix this problem, pass filp->f_pos (which is loff_t) instead of the wrong constant value. | # ../test | telldir: 0 | readdir: d_off = 1, d_name = "." | telldir: 1 | readdir: d_off = 2, d_name = ".." | telldir: 2 | readdir: d_off = 3, d_name = "file0" : At the moment the "offset" for "." is unused because there is no preceding dirent, however it is better to pass filp->f_pos to follow grammatical usage. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> --- fs/btrfs/inode.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-)