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ecryptfs: modify write path to encrypt page in writepage

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Change the write path to encrypt the data only when the page is written to
disk in ecryptfs_writepage. Previously, ecryptfs encrypts the page in
ecryptfs_write_end which means that if there are multiple write requests to
the same page, ecryptfs ends up re-encrypting that page over and over again.
This patch minimizes the number of encryptions needed.

Signed-off-by: Thieu Le <thieule@chromium.org>
[tyhicks: Changed NULL .drop_inode sop pointer to generic_drop_inode]
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
This commit is contained in:
Thieu Le
2011-03-08 16:26:03 -08:00
committed by Tyler Hicks
parent fed8859b3a
commit 57db4e8d73
6 changed files with 38 additions and 30 deletions
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2
fs/ecryptfs/main.c
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@@ -122,7 +122,6 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
ecryptfs_inode_to_private(ecryptfs_dentry->d_inode);
int rc = 0;
mutex_lock(&inode_info->lower_file_mutex);
if (!inode_info->lower_file) {
struct dentry *lower_dentry;
struct vfsmount *lower_mnt =
@@ -138,7 +137,6 @@ int ecryptfs_init_persistent_file(struct dentry *ecryptfs_dentry)
inode_info->lower_file = NULL;
}
}
mutex_unlock(&inode_info->lower_file_mutex);
return rc;
}