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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2012-01-05 13:39:49 +0530
committerEric Van Hensbergen <ericvh@gmail.com>2012-01-05 10:51:44 -0600
commitdf345c674b6366952a21a67604c8f6d489bb7ea7 (patch)
tree8e78d60bbdd04c3ab465be28698edb899fa48097
parent5d3851530d6d68564e4e0ce04d0547d4d106fc72 (diff)
downloadop-kernel-dev-df345c674b6366952a21a67604c8f6d489bb7ea7.zip
op-kernel-dev-df345c674b6366952a21a67604c8f6d489bb7ea7.tar.gz
fs/9p: v9fs_stat2inode should update suid/sgid bits.
Create a new helper that update the permission bits and use that, instead of opencoding the logic. Reported and bisected by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
-rw-r--r--fs/9p/vfs_inode.c40
1 files changed, 28 insertions, 12 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 85c2973..cf3dd6b 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -95,6 +95,32 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
}
/**
+ * p9mode2perm- convert plan9 mode bits to unix permission bits
+ * @v9ses: v9fs session information
+ * @stat: p9_wstat from which mode need to be derived
+ *
+ */
+static int p9mode2perm(struct v9fs_session_info *v9ses,
+ struct p9_wstat *stat)
+{
+ int res;
+ int mode = stat->mode;
+
+ res = mode & S_IALLUGO;
+ if (v9fs_proto_dotu(v9ses)) {
+ if ((mode & P9_DMSETUID) == P9_DMSETUID)
+ res |= S_ISUID;
+
+ if ((mode & P9_DMSETGID) == P9_DMSETGID)
+ res |= S_ISGID;
+
+ if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
+ res |= S_ISVTX;
+ }
+ return res;
+}
+
+/**
* p9mode2unixmode- convert plan9 mode bits to unix mode bits
* @v9ses: v9fs session information
* @stat: p9_wstat from which mode need to be derived
@@ -107,8 +133,8 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses,
int res;
int mode = stat->mode;
- res = mode & S_IALLUGO;
*rdev = 0;
+ res = p9mode2perm(v9ses, stat);
if ((mode & P9_DMDIR) == P9_DMDIR)
res |= S_IFDIR;
@@ -142,16 +168,6 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses,
} else
res |= S_IFREG;
- if (v9fs_proto_dotu(v9ses)) {
- if ((mode & P9_DMSETUID) == P9_DMSETUID)
- res |= S_ISUID;
-
- if ((mode & P9_DMSETGID) == P9_DMSETGID)
- res |= S_ISGID;
-
- if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
- res |= S_ISVTX;
- }
return res;
}
@@ -1168,7 +1184,7 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
set_nlink(inode, i_nlink);
}
}
- mode = stat->mode & S_IALLUGO;
+ mode = p9mode2perm(v9ses, stat);
mode |= inode->i_mode & ~S_IALLUGO;
inode->i_mode = mode;
i_size_write(inode, stat->length);
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