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jbd2: switch to check format version in superblock directly

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We should only check and set extented features if journal format version
is 2, and now we check the in memory copy of the superblock
'journal->j_format_version', which relys on the parameter initialization
sequence, switch to use the h_blocktype in superblock cloud be more
clear.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20230315013128.3911115-5-chengzhihao1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Zhang Yi 2023-03-15 09:31:26 +08:00 committed by Theodore Ts'o
parent 5c5bd1fef3
commit 5cf036d4f1
2 changed files with 21 additions and 12 deletions
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16
fs/jbd2/journal.c
View File

@ -2062,10 +2062,12 @@ int jbd2_journal_load(journal_t *journal)
return err;
sb = journal->j_superblock;
/* If this is a V2 superblock, then we have to check the
* features flags on it. */
if (journal->j_format_version >= 2) {
/*
* If this is a V2 superblock, then we have to check the
* features flags on it.
*/
if (jbd2_format_support_feature(journal)) {
if ((sb->s_feature_ro_compat &
~cpu_to_be32(JBD2_KNOWN_ROCOMPAT_FEATURES)) ||
(sb->s_feature_incompat &
@ -2227,7 +2229,7 @@ int jbd2_journal_check_used_features(journal_t *journal, unsigned long compat,
if (journal->j_format_version == 0 &&
journal_get_superblock(journal) != 0)
return 0;
if (journal->j_format_version == 1)
if (!jbd2_format_support_feature(journal))
return 0;
sb = journal->j_superblock;
@ -2257,11 +2259,7 @@ int jbd2_journal_check_available_features(journal_t *journal, unsigned long comp
if (!compat && !ro && !incompat)
return 1;
/* We can support any known requested features iff the
* superblock is in version 2. Otherwise we fail to support any
* extended sb features. */
if (journal->j_format_version != 2)
if (!jbd2_format_support_feature(journal))
return 0;
if ((compat & JBD2_KNOWN_COMPAT_FEATURES) == compat &&

17
include/linux/jbd2.h
View File

@ -1313,11 +1313,22 @@ struct journal_s
rwsem_release(&j->j_trans_commit_map, _THIS_IP_); \
} while (0)
/*
* We can support any known requested features iff the
* superblock is not in version 1. Otherwise we fail to support any
* extended sb features.
*/
static inline bool jbd2_format_support_feature(journal_t *j)
{
return j->j_superblock->s_header.h_blocktype !=
cpu_to_be32(JBD2_SUPERBLOCK_V1);
}
/* journal feature predicate functions */
#define JBD2_FEATURE_COMPAT_FUNCS(name, flagname) \
static inline bool jbd2_has_feature_##name(journal_t *j) \
{ \
return ((j)->j_format_version >= 2 && \
return (jbd2_format_support_feature(j) && \
((j)->j_superblock->s_feature_compat & \
cpu_to_be32(JBD2_FEATURE_COMPAT_##flagname)) != 0); \
} \
@ -1335,7 +1346,7 @@ static inline void jbd2_clear_feature_##name(journal_t *j) \
#define JBD2_FEATURE_RO_COMPAT_FUNCS(name, flagname) \
static inline bool jbd2_has_feature_##name(journal_t *j) \
{ \
return ((j)->j_format_version >= 2 && \
return (jbd2_format_support_feature(j) && \
((j)->j_superblock->s_feature_ro_compat & \
cpu_to_be32(JBD2_FEATURE_RO_COMPAT_##flagname)) != 0); \
} \
@ -1353,7 +1364,7 @@ static inline void jbd2_clear_feature_##name(journal_t *j) \
#define JBD2_FEATURE_INCOMPAT_FUNCS(name, flagname) \
static inline bool jbd2_has_feature_##name(journal_t *j) \
{ \
return ((j)->j_format_version >= 2 && \
return (jbd2_format_support_feature(j) && \
((j)->j_superblock->s_feature_incompat & \
cpu_to_be32(JBD2_FEATURE_INCOMPAT_##flagname)) != 0); \
} \