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| author | Ian Kent <raven@themaw.net> | 2008-10-15 22:02:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-10-16 11:21:39 -0700 |
| commit | c0f54d3e54fd7ac6723b2125d881f1b25d21ed16 (patch) | |
| tree | 3215eeae82b4c81094227b78ad668943c69b46e5 | |
| parent | bb979d7fc360bc37cbaff43a6fafceb897cb5e47 (diff) | |
| download | linux-3.10-c0f54d3e54fd7ac6723b2125d881f1b25d21ed16.tar.gz linux-3.10-c0f54d3e54fd7ac6723b2125d881f1b25d21ed16.tar.bz2 linux-3.10-c0f54d3e54fd7ac6723b2125d881f1b25d21ed16.zip | |
autofs4: track uid and gid of last mount requester
Track the uid and gid of the last process to request a mount for on an
autofs dentry.
[akpm@linux-foundation.org: fix tpyo in comment]
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | fs/autofs4/autofs_i.h | 3 | ||||
| -rw-r--r-- | fs/autofs4/inode.c | 2 | ||||
| -rw-r--r-- | fs/autofs4/waitq.c | 34 |
3 files changed, 39 insertions, 0 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index ea024d8e37e..fa76d18be08 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -63,6 +63,9 @@ struct autofs_info { unsigned long last_used; atomic_t count; + uid_t uid; + gid_t gid; + mode_t mode; size_t size; diff --git a/fs/autofs4/inode.c b/fs/autofs4/inode.c index 7303099fcc1..c7e65bb30ba 100644 --- a/fs/autofs4/inode.c +++ b/fs/autofs4/inode.c @@ -53,6 +53,8 @@ struct autofs_info *autofs4_init_ino(struct autofs_info *ino, atomic_set(&ino->count, 0); } + ino->uid = 0; + ino->gid = 0; ino->mode = mode; ino->last_used = jiffies; diff --git a/fs/autofs4/waitq.c b/fs/autofs4/waitq.c index 6d87bb15632..4b67c2a2d77 100644 --- a/fs/autofs4/waitq.c +++ b/fs/autofs4/waitq.c @@ -457,6 +457,40 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry, status = wq->status; + /* + * For direct and offset mounts we need to track the requester's + * uid and gid in the dentry info struct. This is so it can be + * supplied, on request, by the misc device ioctl interface. + * This is needed during daemon resatart when reconnecting + * to existing, active, autofs mounts. The uid and gid (and + * related string values) may be used for macro substitution + * in autofs mount maps. + */ + if (!status) { + struct autofs_info *ino; + struct dentry *de = NULL; + + /* direct mount or browsable map */ + ino = autofs4_dentry_ino(dentry); + if (!ino) { + /* If not lookup actual dentry used */ + de = d_lookup(dentry->d_parent, &dentry->d_name); + if (de) + ino = autofs4_dentry_ino(de); + } + + /* Set mount requester */ + if (ino) { + spin_lock(&sbi->fs_lock); + ino->uid = wq->uid; + ino->gid = wq->gid; + spin_unlock(&sbi->fs_lock); + } + + if (de) + dput(de); + } + /* Are we the last process to need status? */ mutex_lock(&sbi->wq_mutex); if (!--wq->wait_ctr) |