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authorAl Viro <viro@zeniv.linux.org.uk>2016-05-11 06:00:29 +0200
committerAl Viro <viro@zeniv.linux.org.uk>2016-05-11 06:00:29 +0200
commite4d35be584be88a3db3fa5635a97c62a2ec5aafe (patch)
treefc22a7fb65697306edd71411959ccee6df60c64d /fs/ext4/ext4.h
parentget_rock_ridge_filename(): handle malformed NM entries (diff)
parentovl: ignore permissions on underlying lookup (diff)
downloadlinux-e4d35be584be88a3db3fa5635a97c62a2ec5aafe.tar.xz
linux-e4d35be584be88a3db3fa5635a97c62a2ec5aafe.zip
Merge branch 'ovl-fixes' into for-linus
Diffstat (limited to 'fs/ext4/ext4.h')
-rw-r--r--fs/ext4/ext4.h33
1 files changed, 29 insertions, 4 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index c04743519865..349afebe21ee 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -912,6 +912,29 @@ do { \
#include "extents_status.h"
/*
+ * Lock subclasses for i_data_sem in the ext4_inode_info structure.
+ *
+ * These are needed to avoid lockdep false positives when we need to
+ * allocate blocks to the quota inode during ext4_map_blocks(), while
+ * holding i_data_sem for a normal (non-quota) inode. Since we don't
+ * do quota tracking for the quota inode, this avoids deadlock (as
+ * well as infinite recursion, since it isn't turtles all the way
+ * down...)
+ *
+ * I_DATA_SEM_NORMAL - Used for most inodes
+ * I_DATA_SEM_OTHER - Used by move_inode.c for the second normal inode
+ * where the second inode has larger inode number
+ * than the first
+ * I_DATA_SEM_QUOTA - Used for quota inodes only
+ */
+enum {
+ I_DATA_SEM_NORMAL = 0,
+ I_DATA_SEM_OTHER,
+ I_DATA_SEM_QUOTA,
+};
+
+
+/*
* fourth extended file system inode data in memory
*/
struct ext4_inode_info {
@@ -1961,7 +1984,7 @@ ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize)
{
unsigned len = le16_to_cpu(dlen);
-#if (PAGE_CACHE_SIZE >= 65536)
+#if (PAGE_SIZE >= 65536)
if (len == EXT4_MAX_REC_LEN || len == 0)
return blocksize;
return (len & 65532) | ((len & 3) << 16);
@@ -1974,7 +1997,7 @@ static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize)
{
if ((len > blocksize) || (blocksize > (1 << 18)) || (len & 3))
BUG();
-#if (PAGE_CACHE_SIZE >= 65536)
+#if (PAGE_SIZE >= 65536)
if (len < 65536)
return cpu_to_le16(len);
if (len == blocksize) {
@@ -2282,11 +2305,13 @@ extern struct kmem_cache *ext4_crypt_info_cachep;
bool ext4_valid_contents_enc_mode(uint32_t mode);
uint32_t ext4_validate_encryption_key_size(uint32_t mode, uint32_t size);
extern struct workqueue_struct *ext4_read_workqueue;
-struct ext4_crypto_ctx *ext4_get_crypto_ctx(struct inode *inode);
+struct ext4_crypto_ctx *ext4_get_crypto_ctx(struct inode *inode,
+ gfp_t gfp_flags);
void ext4_release_crypto_ctx(struct ext4_crypto_ctx *ctx);
void ext4_restore_control_page(struct page *data_page);
struct page *ext4_encrypt(struct inode *inode,
- struct page *plaintext_page);
+ struct page *plaintext_page,
+ gfp_t gfp_flags);
int ext4_decrypt(struct page *page);
int ext4_encrypted_zeroout(struct inode *inode, ext4_lblk_t lblk,
ext4_fsblk_t pblk, ext4_lblk_t len);