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path: root/fs/ecryptfs/inode.c
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2007-06-28eCryptfs: fix write zeros behaviorMichael Halcrow1-0/+19
This patch fixes the processes involved in wiping regions of the data during truncate and write events, fixing a kernel hang in 2.6.22-rc4 while assuring that zero values are written out to the appropriate locations during events in which the i_size will change. The range passed to ecryptfs_truncate() from ecryptfs_prepare_write() includes the page that is the object of ecryptfs_prepare_write(). This leads to a kernel hang as read_cache_page() is executed on the same page in the ecryptfs_truncate() execution path. This patch remedies this by limiting the range passed to ecryptfs_truncate() so as to exclude the page that is the object of ecryptfs_prepare_write(); it also adds code to ecryptfs_prepare_write() to zero out the region of its own page when writing past the i_size position. This patch also modifies ecryptfs_truncate() so that when a file is truncated to a smaller size, eCryptfs will zero out the contents of the new last page from the new size through to the end of the last page. Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-03-08[PATCH] ecryptfs: nested locking annotationPeter Zijlstra1-1/+1
ecryptfs uses a lock_parent() function, which I hope really locks the parents and is not abused Signed-off-by: Peter Zijlstra <[email protected]> Cc: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-03-05[PATCH] ecryptfs: check xattr operation support fixDmitriy Monakhov1-3/+3
- ecryptfs_write_inode_size_to_metadata() error code was ignored. - i_op->setxattr() must be supported by lower fs because used below. Signed-off-by: Monakhov Dmitriy <[email protected]> Acked-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-03-01[PATCH] eCryptfs: set O_LARGEFILE when opening lower fileMichael Halcrow1-3/+0
O_LARGEFILE should be set here when opening the lower file. Signed-off-by: Michael Halcrow <[email protected]> Cc: Dmitriy Monakhov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-02-12[PATCH] mark struct inode_operations const 1Arjan van de Ven1-3/+3
Many struct inode_operations in the kernel can be "const". Marking them const moves these to the .rodata section, which avoids false sharing with potential dirty data. In addition it'll catch accidental writes at compile time to these shared resources. Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-02-12[PATCH] eCryptfs: open-code flag checking and manipulationMichael Halcrow1-8/+6
Open-code flag checking and manipulation. Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Trevor Highland <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-02-12[PATCH] eCryptfs: convert f_op->write() to vfs_write()Michael Halcrow1-1/+1
sys_write() takes a local copy of f_pos and writes that back into the struct file. It does this so that two concurrent write() callers don't make a mess of f_pos, and of the file contents. ecryptfs should be calling vfs_write(). That way we also get the fsnotify notifications, which ecryptfs presently appears to have subverted. Convert direct calls to f_op->write() into calls to vfs_write(). Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-02-12[PATCH] eCryptfs: Encrypted passthroughMichael Halcrow1-2/+13
Provide an option to provide a view of the encrypted files such that the metadata is always in the header of the files, regardless of whether the metadata is actually in the header or in the extended attribute. This mode of operation is useful for applications like incremental backup utilities that do not preserve the extended attributes when directly accessing the lower files. With this option enabled, the files under the eCryptfs mount point will be read-only. Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-02-12[PATCH] eCryptfs: Generalize metadata read/writeMichael Halcrow1-26/+35
Generalize the metadata reading and writing mechanisms, with two targets for now: metadata in file header and metadata in the user.ecryptfs xattr of the lower file. [[email protected]: printk warning fix] [[email protected]: make some needlessly global code static] Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2007-02-11[PATCH] Transform kmem_cache_alloc()+memset(0) -> kmem_cache_zalloc().Robert P. J. Day1-3/+2
Replace appropriate pairs of "kmem_cache_alloc()" + "memset(0)" with the corresponding "kmem_cache_zalloc()" call. Signed-off-by: Robert P. J. Day <[email protected]> Cc: "Luck, Tony" <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Roland McGrath <[email protected]> Cc: James Bottomley <[email protected]> Cc: Greg KH <[email protected]> Acked-by: Joel Becker <[email protected]> Cc: Steven Whitehouse <[email protected]> Cc: Jan Kara <[email protected]> Cc: Michael Halcrow <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Stephen Smalley <[email protected]> Cc: James Morris <[email protected]> Cc: Chris Wright <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-12-08[PATCH] ecryptfs: change uses of f_{dentry, vfsmnt} to use f_pathJosef "Jeff" Sipek1-2/+2
Change all the uses of f_{dentry,vfsmnt} to f_path.{dentry,mnt} in the ecryptfs filesystem. Signed-off-by: Josef "Jeff" Sipek <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-12-08[PATCH] eCryptfs: Use fsstack's generic copy inode attr functionsJosef "Jeff" Sipek1-56/+19
Replace eCryptfs specific code & calls with the more generic fsstack equivalents and remove the eCryptfs specific functions. Signed-off-by: Josef "Jeff" Sipek <[email protected]> Cc: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-12-07[PATCH] slab: remove SLAB_KERNELChristoph Lameter1-2/+2
SLAB_KERNEL is an alias of GFP_KERNEL. Signed-off-by: Christoph Lameter <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-12-07[PATCH] slab: remove SLAB_USERChristoph Lameter1-1/+1
SLAB_USER is an alias of GFP_USER Signed-off-by: Christoph Lameter <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-11-16[PATCH] eCryptfs: CIFS nlink fixesMichael Halcrow1-1/+2
When CIFS is the lower filesystem, the old lower dentry needs to be explicitly dropped from inside eCryptfs to force a revalidate. In addition, when CIFS is the lower filesystem, the inode attributes need to be copied back up from the lower inode to the eCryptfs inode on an eCryptfs revalidate. Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-11-16[PATCH] eCryptfs: dput() lower d_parent on renameMichael Halcrow1-0/+2
On rename, for both the old and new lower dentry objects, eCryptfs is missing a dput on the lower parent directory dentry. This patch will prevent the BUG() at fs/dcache.c:613 from being hit after renaming a file inside eCryptfs and then doing a umount on the lower filesystem. Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-10-31[PATCH] eCryptfs: Fix handling of lower d_countMichael Halcrow1-42/+20
Fix the use of dget/dput calls to balance out on the lower filesystem. Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-10-31[PATCH] eCryptfs: Consolidate lower dentry_open'sMichael Halcrow1-22/+11
Opens on lower dentry objects happen in several places in eCryptfs, and they all involve the same steps (dget, mntget, dentry_open). This patch consolidates the lower open events into a single function call. Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-10-04[PATCH] ecryptfs: fs/Makefile and fs/KconfigMichael Halcrow1-0/+1079
eCryptfs is a stacked cryptographic filesystem for Linux. It is derived from Erez Zadok's Cryptfs, implemented through the FiST framework for generating stacked filesystems. eCryptfs extends Cryptfs to provide advanced key management and policy features. eCryptfs stores cryptographic metadata in the header of each file written, so that encrypted files can be copied between hosts; the file will be decryptable with the proper key, and there is no need to keep track of any additional information aside from what is already in the encrypted file itself. [[email protected]: updates for ongoing API changes] [[email protected]: cleanups] [[email protected]: alpha build fix] [[email protected]: cleanups] [[email protected]: inode-diet updates] [[email protected]: generic_file_*_read/write() interface updates] [[email protected]: printk format fixes] [[email protected]: make slab creation and teardown table-driven] Signed-off-by: Phillip Hellewell <[email protected]> Signed-off-by: Michael Halcrow <[email protected]> Signed-off-by: Erez Zadok <[email protected]> Signed-off-by: Adrian Bunk <[email protected]> Signed-off-by: Stephan Mueller <[email protected]> Signed-off-by: "Theodore Ts'o" <[email protected]> Signed-off-by: Badari Pulavarty <[email protected]> Signed-off-by: Randy Dunlap <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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