diff options
| author | David Howells <dhowells@redhat.com> | 2008-11-14 10:38:49 +1100 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2008-11-14 10:38:49 +1100 |
| commit | 4eea03539d9a8e3f5056aed690efde1f75535e7b (patch) | |
| tree | 1dd58dee9a286459c7a70b8f82edcb63d20b2c07 /fs/ecryptfs/miscdev.c | |
| parent | ec4c2aacd16672febca053109eb9ddf672108ca1 (diff) | |
| download | linux-next-4eea03539d9a8e3f5056aed690efde1f75535e7b.tar.gz | |
CRED: Wrap task credential accesses in the eCryptFS filesystem
Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.
Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().
Change some task->e?[ug]id to task_e?[ug]id(). In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Mike Halcrow <mhalcrow@us.ibm.com>
Cc: Phillip Hellewell <phillip@hellewell.homeip.net>
Cc: ecryptfs-devel@lists.sourceforge.net
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'fs/ecryptfs/miscdev.c')
| -rw-r--r-- | fs/ecryptfs/miscdev.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c index b484792a0996..047ac609695b 100644 --- a/fs/ecryptfs/miscdev.c +++ b/fs/ecryptfs/miscdev.c @@ -42,11 +42,12 @@ ecryptfs_miscdev_poll(struct file *file, poll_table *pt) { struct ecryptfs_daemon *daemon; unsigned int mask = 0; + uid_t euid = current_euid(); int rc; mutex_lock(&ecryptfs_daemon_hash_mux); /* TODO: Just use file->private_data? */ - rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid, + rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current->nsproxy->user_ns); BUG_ON(rc || !daemon); mutex_lock(&daemon->mux); @@ -83,6 +84,7 @@ static int ecryptfs_miscdev_open(struct inode *inode, struct file *file) { struct ecryptfs_daemon *daemon = NULL; + uid_t euid = current_euid(); int rc; mutex_lock(&ecryptfs_daemon_hash_mux); @@ -93,10 +95,10 @@ ecryptfs_miscdev_open(struct inode *inode, struct file *file) "count; rc = [%d]\n", __func__, rc); goto out_unlock_daemon_list; } - rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid, + rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current->nsproxy->user_ns); if (rc || !daemon) { - rc = ecryptfs_spawn_daemon(&daemon, current->euid, + rc = ecryptfs_spawn_daemon(&daemon, euid, current->nsproxy->user_ns, task_pid(current)); if (rc) { @@ -147,10 +149,11 @@ static int ecryptfs_miscdev_release(struct inode *inode, struct file *file) { struct ecryptfs_daemon *daemon = NULL; + uid_t euid = current_euid(); int rc; mutex_lock(&ecryptfs_daemon_hash_mux); - rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid, + rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current->nsproxy->user_ns); BUG_ON(rc || !daemon); mutex_lock(&daemon->mux); @@ -246,11 +249,12 @@ ecryptfs_miscdev_read(struct file *file, char __user *buf, size_t count, char packet_length[3]; size_t i; size_t total_length; + uid_t euid = current_euid(); int rc; mutex_lock(&ecryptfs_daemon_hash_mux); /* TODO: Just use file->private_data? */ - rc = ecryptfs_find_daemon_by_euid(&daemon, current->euid, + rc = ecryptfs_find_daemon_by_euid(&daemon, euid, current->nsproxy->user_ns); BUG_ON(rc || !daemon); mutex_lock(&daemon->mux); @@ -290,7 +294,7 @@ check_list: * message from the queue; try again */ goto check_list; } - BUG_ON(current->euid != daemon->euid); + BUG_ON(euid != daemon->euid); BUG_ON(current->nsproxy->user_ns != daemon->user_ns); BUG_ON(task_pid(current) != daemon->pid); msg_ctx = list_first_entry(&daemon->msg_ctx_out_queue, @@ -414,6 +418,7 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf, size_t packet_size, packet_size_length, i; ssize_t sz = 0; char *data; + uid_t euid = current_euid(); int rc; if (count == 0) @@ -463,8 +468,7 @@ ecryptfs_miscdev_write(struct file *file, const char __user *buf, goto out_free; } rc = ecryptfs_miscdev_response(&data[i], packet_size, - current->euid, - current->nsproxy->user_ns, + euid, current->nsproxy->user_ns, task_pid(current), seq); if (rc) printk(KERN_WARNING "%s: Failed to deliver miscdev " |