diff options
| author | Jan Kara <jack@suse.cz> | 2023-01-03 11:56:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-03-11 18:39:57 +0300 |
| commit | 63478c3ce24bba1fb4736102bfb1aa986e215cb0 (patch) | |
| tree | 46334c9a748335dddcbeb83aba8be615da67acd4 | |
| parent | eb2133900cac2d2f78befd6be41666cf1a2315d9 (diff) | |
| download | linux-63478c3ce24bba1fb4736102bfb1aa986e215cb0.tar.xz | |
udf: Preserve link count of system files
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@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/udf/inode.c | 9 | ||||
| -rw-r--r-- | fs/udf/super.c | 1 | ||||
| -rw-r--r-- | fs/udf/udf_i.h | 3 |
3 files changed, 10 insertions, 3 deletions
diff --git a/fs/udf/inode.c b/fs/udf/inode.c index 6b6968f4c55e..8fed514be5f3 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -1385,6 +1385,7 @@ reread: ret = -EIO; goto out; } + iinfo->i_hidden = hidden_inode; iinfo->i_unique = 0; iinfo->i_lenEAttr = 0; iinfo->i_lenExtents = 0; @@ -1720,8 +1721,12 @@ static int udf_update_inode(struct inode *inode, int do_sync) 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); diff --git a/fs/udf/super.c b/fs/udf/super.c index 3448098e5476..4af9ce34ee80 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -147,6 +147,7 @@ static struct inode *udf_alloc_inode(struct super_block *sb) 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); diff --git a/fs/udf/udf_i.h b/fs/udf/udf_i.h index 06ff7006b822..312b7c9ef10e 100644 --- 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; |