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ocfs2: Wrap extent block reads in a dedicated function.

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We weren't consistently checking extent blocks after we read them.
Most places checked the signature, but none checked h_blkno or
h_fs_signature.  Create a toplevel ocfs2_read_extent_block() that does
the read and the validation.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Joel Becker
2008-11-13 14:49:16 -08:00
committed by Mark Fasheh
parent 4203530613
commit 5e96581a37
4 changed files with 111 additions and 79 deletions
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8
fs/ocfs2/ocfs2.h
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@@ -447,14 +447,6 @@ static inline int ocfs2_uses_extended_slot_map(struct ocfs2_super *osb)
#define OCFS2_IS_VALID_EXTENT_BLOCK(ptr) \
(!strcmp((ptr)->h_signature, OCFS2_EXTENT_BLOCK_SIGNATURE))
#define OCFS2_RO_ON_INVALID_EXTENT_BLOCK(__sb, __eb) do { \
typeof(__eb) ____eb = (__eb); \
ocfs2_error((__sb), \
"Extent Block # %llu has bad signature %.*s", \
(unsigned long long)le64_to_cpu((____eb)->h_blkno), 7, \
(____eb)->h_signature); \
} while (0)
#define OCFS2_IS_VALID_GROUP_DESC(ptr) \
(!strcmp((ptr)->bg_signature, OCFS2_GROUP_DESC_SIGNATURE))