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[PATCH] 64-bit jbd2 core

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Here is the patch to JBD to handle 64 bit block numbers, originally from Zach
Brown.  This patch is useful only after adding support for 64-bit block
numbers in the filesystem.

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Zach Brown <zach.brown@oracle.com>
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Zach Brown
2006-10-11 01:21:08 -07:00
committed by Linus Torvalds
parent d0d856e8bd
commit b517bea1c7
5 changed files with 77 additions and 22 deletions
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14
include/linux/jbd2.h
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@@ -150,14 +150,21 @@ typedef struct journal_header_s
/*
* The block tag: used to describe a single buffer in the journal
* The block tag: used to describe a single buffer in the journal.
* t_blocknr_high is only used if INCOMPAT_64BIT is set, so this
* raw struct shouldn't be used for pointer math or sizeof() - use
* journal_tag_bytes(journal) instead to compute this.
*/
typedef struct journal_block_tag_s
{
__be32 t_blocknr; /* The on-disk block number */
__be32 t_flags; /* See below */
__be32 t_blocknr_high; /* most-significant high 32bits. */
} journal_block_tag_t;
#define JBD_TAG_SIZE32 (offsetof(journal_block_tag_t, t_blocknr_high))
#define JBD_TAG_SIZE64 (sizeof(journal_block_tag_t))
/*
* The revoke descriptor: used on disk to describe a series of blocks to
* be revoked from the log
@@ -235,11 +242,13 @@ typedef struct journal_superblock_s
((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask))))
#define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001
#define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002
/* Features known to this kernel version: */
#define JBD2_KNOWN_COMPAT_FEATURES 0
#define JBD2_KNOWN_ROCOMPAT_FEATURES 0
#define JBD2_KNOWN_INCOMPAT_FEATURES JBD2_FEATURE_INCOMPAT_REVOKE
#define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE | \
JBD2_FEATURE_INCOMPAT_64BIT)
#ifdef __KERNEL__
@@ -1052,6 +1061,7 @@ 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);
/*
* Return the minimum number of blocks which must be free in the journal