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| author | David Woodhouse <David.Woodhouse@intel.com> | 2016-02-01 17:04:46 +0300 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2016-02-25 14:11:28 +0300 |
| commit | be629c62a603e5935f8177fd8a19e014100a259e (patch) | |
| tree | f94560a8b9a91a2ada6253a55133977f8553b31c /fs/jffs2/nodelist.h | |
| parent | 49e91e7079febe59a20ca885a87dd1c54240d0f1 (diff) | |
| download | linux-be629c62a603e5935f8177fd8a19e014100a259e.tar.xz | |
Fix directory hardlinks from deleted directories
When a directory is deleted, we don't take too much care about killing off
all the dirents that belong to it — on the basis that on remount, the scan
will conclude that the directory is dead anyway.
This doesn't work though, when the deleted directory contained a child
directory which was moved *out*. In the early stages of the fs build
we can then end up with an apparent hard link, with the child directory
appearing both in its true location, and as a child of the original
directory which are this stage of the mount process we don't *yet* know
is defunct.
To resolve this, take out the early special-casing of the "directories
shall not have hard links" rule in jffs2_build_inode_pass1(), and let the
normal nlink processing happen for directories as well as other inodes.
Then later in the build process we can set ic->pino_nlink to the parent
inode#, as is required for directories during normal operaton, instead
of the nlink. And complain only *then* about hard links which are still
in evidence even after killing off all the unreachable paths.
Reported-by: Liu Song <liu.song11@zte.com.cn>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'fs/jffs2/nodelist.h')
| -rw-r--r-- | fs/jffs2/nodelist.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h index fa35ff79ab35..0637271f3770 100644 --- a/fs/jffs2/nodelist.h +++ b/fs/jffs2/nodelist.h @@ -194,6 +194,7 @@ struct jffs2_inode_cache { #define INO_STATE_CLEARING 6 /* In clear_inode() */ #define INO_FLAGS_XATTR_CHECKED 0x01 /* has no duplicate xattr_ref */ +#define INO_FLAGS_IS_DIR 0x02 /* is a directory */ #define RAWNODE_CLASS_INODE_CACHE 0 #define RAWNODE_CLASS_XATTR_DATUM 1 @@ -249,7 +250,10 @@ struct jffs2_readinode_info struct jffs2_full_dirent { - struct jffs2_raw_node_ref *raw; + union { + struct jffs2_raw_node_ref *raw; + struct jffs2_inode_cache *ic; /* Just during part of build */ + }; struct jffs2_full_dirent *next; uint32_t version; uint32_t ino; /* == zero for unlink */ |