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authorTyler Hicks <tyhicks@canonical.com>2012-01-14 19:46:46 +0400
committerTyler Hicks <tyhicks@canonical.com>2012-01-26 00:43:40 +0400
commit48399c0b0e6172888a2e2e36df1595ab1e049ba8 (patch)
tree7fb94f7ce80de13fd419e69322d9e6b157a49f91 /fs/ecryptfs/keystore.c
parent7f133504249afa48618becac546ce3c35c9f0185 (diff)
downloadlinux-48399c0b0e6172888a2e2e36df1595ab1e049ba8.tar.xz
eCryptfs: Replace miscdev read/write magic numbers
ecryptfs_miscdev_read() and ecryptfs_miscdev_write() contained many magic numbers for specifying packet header field sizes and offsets. This patch defines those values and replaces the magic values. Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Diffstat (limited to 'fs/ecryptfs/keystore.c')
-rw-r--r--fs/ecryptfs/keystore.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index ac1ad48c2376..8e3b943e330f 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -109,7 +109,7 @@ int ecryptfs_parse_packet_length(unsigned char *data, size_t *size,
(*size) += ((unsigned char)(data[1]) + 192);
(*length_size) = 2;
} else if (data[0] == 255) {
- /* Five-byte length; we're not supposed to see this */
+ /* If support is added, adjust ECRYPTFS_MAX_PKT_LEN_SIZE */
ecryptfs_printk(KERN_ERR, "Five-byte packet length not "
"supported\n");
rc = -EINVAL;
@@ -126,7 +126,7 @@ out:
/**
* ecryptfs_write_packet_length
* @dest: The byte array target into which to write the length. Must
- * have at least 5 bytes allocated.
+ * have at least ECRYPTFS_MAX_PKT_LEN_SIZE bytes allocated.
* @size: The length to write.
* @packet_size_length: The number of bytes used to encode the packet
* length is written to this address.
@@ -146,6 +146,7 @@ int ecryptfs_write_packet_length(char *dest, size_t size,
dest[1] = ((size - 192) % 256);
(*packet_size_length) = 2;
} else {
+ /* If support is added, adjust ECRYPTFS_MAX_PKT_LEN_SIZE */
rc = -EINVAL;
ecryptfs_printk(KERN_WARNING,
"Unsupported packet size: [%zd]\n", size);