diff options
| author |   Matthew Garrett <mjg@redhat.com> | 2012-06-17 17:05:25 -0400 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2012-06-17 14:39:59 -0700 |
| commit | 7dea9665fee828fb56db3bae5b9685d9fa006d33 (patch) | |
| tree | 1c3daa7f96d9567a171b7823d141800312d9e66a /fs | |
| parent | hfsplus: fix overflow in sector calculations in hfsplus_submit_bio (diff) | |
| download | linux-dev-7dea9665fee828fb56db3bae5b9685d9fa006d33.tar.xz linux-dev-7dea9665fee828fb56db3bae5b9685d9fa006d33.zip | |
hfsplus: fix bless ioctl when used with hardlinks
HFS+ doesn't really implement hard links - instead, hardlinks are indicated
by a magic file type which refers to an indirect node in a hidden
directory. The spec indicates that stat() should return the inode number
of the indirect node, but it turns out that this doesn't satisfy the
firmware when it's looking for a bootloader - it wants the catalog ID of
the hardlink file instead. Fix up this case.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/hfsplus/ioctl.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c index c640ba57074b..09addc8615fa 100644 --- a/fs/hfsplus/ioctl.c +++ b/fs/hfsplus/ioctl.c @@ -31,6 +31,7 @@ static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags) struct hfsplus_sb_info *sbi = HFSPLUS_SB(inode->i_sb); struct hfsplus_vh *vh = sbi->s_vhdr; struct hfsplus_vh *bvh = sbi->s_backup_vhdr; + u32 cnid = (unsigned long)dentry->d_fsdata; if (!capable(CAP_SYS_ADMIN)) return -EPERM; @@ -41,8 +42,12 @@ static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags) vh->finder_info[0] = bvh->finder_info[0] = cpu_to_be32(parent_ino(dentry)); - /* Bootloader */ - vh->finder_info[1] = bvh->finder_info[1] = cpu_to_be32(inode->i_ino); + /* + * Bootloader. Just using the inode here breaks in the case of + * hard links - the firmware wants the ID of the hard link file, + * but the inode points at the indirect inode + */ + vh->finder_info[1] = bvh->finder_info[1] = cpu_to_be32(cnid); /* Per spec, the OS X system folder - same as finder_info[0] here */ vh->finder_info[5] = bvh->finder_info[5] = |