diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2012-01-05 09:09:49 +0100 |
|---|---|---|
| committer | Eric Van Hensbergen <ericvh@gmail.com> | 2012-01-05 17:51:44 +0100 |
| commit | df345c674b6366952a21a67604c8f6d489bb7ea7 (patch) | |
| tree | 8e78d60bbdd04c3ab465be28698edb899fa48097 /fs/9p | |
| parent | 9p: Reduce object size with CONFIG_NET_9P_DEBUG (diff) | |
| download | linux-df345c674b6366952a21a67604c8f6d489bb7ea7.tar.xz linux-df345c674b6366952a21a67604c8f6d489bb7ea7.zip | |
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>
Diffstat (limited to 'fs/9p')
| -rw-r--r-- | fs/9p/vfs_inode.c | 40 |
1 files changed, 28 insertions, 12 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 85c29733d8b8..cf3dd6bc537e 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); |