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authorTyler Hicks <tyhicks@linux.vnet.ibm.com>2010-02-11 16:10:38 +0300
committerTyler Hicks <tyhicks@linux.vnet.ibm.com>2010-03-23 20:29:49 +0300
commit157f1071354db1aed885816094888e0e257c9d0a (patch)
tree711d00d7dce97f846342db0a27b4a61c6b1966a4 /fs/ecryptfs/ecryptfs_kernel.h
parent220bf991b0366cc50a94feede3d7341fa5710ee4 (diff)
downloadlinux-157f1071354db1aed885816094888e0e257c9d0a.tar.xz
eCryptfs: Fix metadata in xattr feature regression
Fixes regression in 8faece5f906725c10e7a1f6caf84452abadbdc7b When using the ecryptfs_xattr_metadata mount option, eCryptfs stores the metadata (normally stored at the front of the file) in the user.ecryptfs xattr. This causes ecryptfs_crypt_stat.num_header_bytes_at_front to be 0, since there is no header data at the front of the file. This results in too much memory being requested and ENOMEM being returned from ecryptfs_write_metadata(). This patch fixes the problem by using the num_header_bytes_at_front variable for specifying the max size of the metadata, despite whether it is stored in the header or xattr. Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Diffstat (limited to 'fs/ecryptfs/ecryptfs_kernel.h')
-rw-r--r--fs/ecryptfs/ecryptfs_kernel.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index 542f625312f3..8456f70606ad 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -464,6 +464,14 @@ struct ecryptfs_daemon {
extern struct mutex ecryptfs_daemon_hash_mux;
+static inline size_t
+ecryptfs_lower_header_size(struct ecryptfs_crypt_stat *crypt_stat)
+{
+ if (crypt_stat->flags & ECRYPTFS_METADATA_IN_XATTR)
+ return 0;
+ return crypt_stat->num_header_bytes_at_front;
+}
+
static inline struct ecryptfs_file_info *
ecryptfs_file_to_private(struct file *file)
{