This is a note to let you know that I've just added the patch titled
udf: Preserve link count of system files
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
udf-preserve-link-count-of-system-files.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From fc8033a34a3ca7d23353e645e6dde5d364ac5f12 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@xxxxxxx>
Date: Tue, 3 Jan 2023 09:56:56 +0100
Subject: udf: Preserve link count of system files
From: Jan Kara <jack@xxxxxxx>
commit fc8033a34a3ca7d23353e645e6dde5d364ac5f12 upstream.
System files in UDF filesystem have link count 0. To not confuse VFS we
fudge the link count to be 1 when reading such inodes however we forget
to restore the link count of 0 when writing such inodes. Fix that.
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jan Kara <jack@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/udf/inode.c | 9 +++++++--
fs/udf/super.c | 1 +
fs/udf/udf_i.h | 3 ++-
3 files changed, 10 insertions(+), 3 deletions(-)
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1380,6 +1380,7 @@ reread:
ret = -EIO;
goto out;
}
+ iinfo->i_hidden = hidden_inode;
iinfo->i_unique = 0;
iinfo->i_lenEAttr = 0;
iinfo->i_lenExtents = 0;
@@ -1715,8 +1716,12 @@ static int udf_update_inode(struct inode
if (S_ISDIR(inode->i_mode) && inode->i_nlink > 0)
fe->fileLinkCount = cpu_to_le16(inode->i_nlink - 1);
- else
- fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
+ else {
+ if (iinfo->i_hidden)
+ fe->fileLinkCount = cpu_to_le16(0);
+ else
+ fe->fileLinkCount = cpu_to_le16(inode->i_nlink);
+ }
fe->informationLength = cpu_to_le64(inode->i_size);
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -147,6 +147,7 @@ static struct inode *udf_alloc_inode(str
ei->i_next_alloc_goal = 0;
ei->i_strat4096 = 0;
ei->i_streamdir = 0;
+ ei->i_hidden = 0;
init_rwsem(&ei->i_data_sem);
ei->cached_extent.lstart = -1;
spin_lock_init(&ei->i_extent_cache_lock);
--- a/fs/udf/udf_i.h
+++ b/fs/udf/udf_i.h
@@ -44,7 +44,8 @@ struct udf_inode_info {
unsigned i_use : 1; /* unallocSpaceEntry */
unsigned i_strat4096 : 1;
unsigned i_streamdir : 1;
- unsigned reserved : 25;
+ unsigned i_hidden : 1; /* hidden system inode */
+ unsigned reserved : 24;
__u8 *i_data;
struct kernel_lb_addr i_locStreamdir;
__u64 i_lenStreams;
Patches currently in stable-queue which might be from jack@xxxxxxx are
queue-6.1/sbitmap-use-single-per-bitmap-counting-to-wake-up-qu.patch
queue-6.1/udf-fix-file-corruption-when-appending-just-after-end-of-preallocated-extent.patch
queue-6.1/sbitmap-correct-wake_batch-recalculation-to-avoid-po.patch
queue-6.1/udf-do-not-update-file-length-for-failed-writes-to-inline-files.patch
queue-6.1/udf-truncate-added-extents-on-failed-expansion.patch
queue-6.1/udf-detect-system-inodes-linked-into-directory-hierarchy.patch
queue-6.1/udf-do-not-bother-merging-very-long-extents.patch
queue-6.1/udf-define-efscorrupted-error-code.patch
queue-6.1/sbitmap-remove-redundant-check-in-__sbitmap_queue_ge.patch
queue-6.1/udf-preserve-link-count-of-system-files.patch
