summaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2014-08-29 11:52:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-29 11:52:46 -0700
commitd4f03186c8986ffde34d06fe74a99aab08f7ee0b (patch)
tree9887bc2405a4f9e17185aa1338dec3ae68246b16 /include
parentef13c8afa67518e1d173a6f3b95dd02559879421 (diff)
parentd80d448c6c5bdd32605b78a60fe8081d82d4da0f (diff)
Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bugfixes from Ted Ts'o: "Ext4 bug fixes for 3.17, to provide better handling of memory allocation failures, and to fix some journaling bugs involving journal checksums and FALLOC_FL_ZERO_RANGE" * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: fix same-dir rename when inline data directory overflows jbd2: fix descriptor block size handling errors with journal_csum jbd2: fix infinite loop when recovering corrupt journal blocks ext4: update i_disksize coherently with block allocation on error path ext4: fix transaction issues for ext4_fallocate and ext_zero_range ext4: fix incorect journal credits reservation in ext4_zero_range ext4: move i_size,i_disksize update routines to helper function ext4: fix BUG_ON in mb_free_blocks() ext4: propagate errors up to ext4_find_entry()'s callers
Diffstat (limited to 'include')
-rw-r--r--include/linux/jbd2.h30
1 files changed, 25 insertions, 5 deletions
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index d5b50a19463c..0dae71e9971c 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -159,7 +159,11 @@ typedef struct journal_header_s
* journal_block_tag (in the descriptor). The other h_chksum* fields are
* not used.
*
- * Checksum v1 and v2 are mutually exclusive features.
+ * If FEATURE_INCOMPAT_CSUM_V3 is set, the descriptor block uses
+ * journal_block_tag3_t to store a full 32-bit checksum. Everything else
+ * is the same as v2.
+ *
+ * Checksum v1, v2, and v3 are mutually exclusive features.
*/
struct commit_header {
__be32 h_magic;
@@ -179,6 +183,14 @@ struct commit_header {
* raw struct shouldn't be used for pointer math or sizeof() - use
* journal_tag_bytes(journal) instead to compute this.
*/
+typedef struct journal_block_tag3_s
+{
+ __be32 t_blocknr; /* The on-disk block number */
+ __be32 t_flags; /* See below */
+ __be32 t_blocknr_high; /* most-significant high 32bits. */
+ __be32 t_checksum; /* crc32c(uuid+seq+block) */
+} journal_block_tag3_t;
+
typedef struct journal_block_tag_s
{
__be32 t_blocknr; /* The on-disk block number */
@@ -187,9 +199,6 @@ typedef struct journal_block_tag_s
__be32 t_blocknr_high; /* most-significant high 32bits. */
} journal_block_tag_t;
-#define JBD2_TAG_SIZE32 (offsetof(journal_block_tag_t, t_blocknr_high))
-#define JBD2_TAG_SIZE64 (sizeof(journal_block_tag_t))
-
/* Tail of descriptor block, for checksumming */
struct jbd2_journal_block_tail {
__be32 t_checksum; /* crc32c(uuid+descr_block) */
@@ -284,6 +293,7 @@ typedef struct journal_superblock_s
#define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002
#define JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT 0x00000004
#define JBD2_FEATURE_INCOMPAT_CSUM_V2 0x00000008
+#define JBD2_FEATURE_INCOMPAT_CSUM_V3 0x00000010
/* Features known to this kernel version: */
#define JBD2_KNOWN_COMPAT_FEATURES JBD2_FEATURE_COMPAT_CHECKSUM
@@ -291,7 +301,8 @@ typedef struct journal_superblock_s
#define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE | \
JBD2_FEATURE_INCOMPAT_64BIT | \
JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | \
- JBD2_FEATURE_INCOMPAT_CSUM_V2)
+ JBD2_FEATURE_INCOMPAT_CSUM_V2 | \
+ JBD2_FEATURE_INCOMPAT_CSUM_V3)
#ifdef __KERNEL__
@@ -1296,6 +1307,15 @@ static inline int tid_geq(tid_t x, tid_t y)
extern int jbd2_journal_blocks_per_page(struct inode *inode);
extern size_t journal_tag_bytes(journal_t *journal);
+static inline int jbd2_journal_has_csum_v2or3(journal_t *journal)
+{
+ if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V2) ||
+ JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V3))
+ return 1;
+
+ return 0;
+}
+
/*
* We reserve t_outstanding_credits >> JBD2_CONTROL_BLOCKS_SHIFT for
* transaction control blocks.