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authorMichael Halcrow <mhalcrow@us.ibm.com>2008-07-23 21:30:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:31 -0700
commit72b55fffd631a89e5be6fe1b4f2565bc4cd90deb (patch)
treeece810c24655a6eeed96a6f2fbe14dea6478f031 /fs/ecryptfs/file.c
parent0a688ad713949643e201431d3f4a4ceddfeb70ca (diff)
downloadlinux-72b55fffd631a89e5be6fe1b4f2565bc4cd90deb.tar.bz2
eCryptfs: do not try to open device files on mknod
When creating device nodes, eCryptfs needs to delay actually opening the lower persistent file until an application tries to open. Device handles may not be backed by anything when they first come into existence. [Valdis.Kletnieks@vt.edu: build fix] Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com> Cc: <Valdis.Kletnieks@vt.edu} Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ecryptfs/file.c')
-rw-r--r--fs/ecryptfs/file.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index f0be29051528..2c2d60df3f60 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -199,6 +199,20 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
"file must hence be opened RO\n", __func__);
goto out;
}
+ if (!ecryptfs_inode_to_private(inode)->lower_file) {
+ BUG_ON(!(crypt_stat->flags & ECRYPTFS_DELAY_PERSISTENT));
+ mutex_lock(&crypt_stat->cs_mutex);
+ crypt_stat->flags &= ~(ECRYPTFS_ENCRYPTED);
+ mutex_unlock(&crypt_stat->cs_mutex);
+ rc = ecryptfs_init_persistent_file(ecryptfs_dentry);
+ if (rc) {
+ printk(KERN_ERR "%s: Error attempting to initialize "
+ "the persistent file for the dentry with name "
+ "[%s]; rc = [%d]\n", __func__,
+ ecryptfs_dentry->d_name.name, rc);
+ goto out;
+ }
+ }
ecryptfs_set_file_lower(
file, ecryptfs_inode_to_private(inode)->lower_file);
if (S_ISDIR(ecryptfs_dentry->d_inode->i_mode)) {