diff options
Diffstat (limited to 'kernel/include/linux/jbd2.h')
| -rw-r--r-- | kernel/include/linux/jbd2.h | 149 |
1 files changed, 143 insertions, 6 deletions
diff --git a/kernel/include/linux/jbd2.h b/kernel/include/linux/jbd2.h index eb1cebed3..eb5aabe4e 100644 --- a/kernel/include/linux/jbd2.h +++ b/kernel/include/linux/jbd2.h @@ -29,6 +29,7 @@ #include <linux/mutex.h> #include <linux/timer.h> #include <linux/slab.h> +#include <linux/bit_spinlock.h> #include <crypto/hash.h> #endif @@ -277,6 +278,7 @@ typedef struct journal_superblock_s /* 0x0400 */ } journal_superblock_t; +/* Use the jbd2_{has,set,clear}_feature_* helpers; these will be removed */ #define JBD2_HAS_COMPAT_FEATURE(j,mask) \ ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask)))) @@ -287,7 +289,7 @@ typedef struct journal_superblock_s ((j)->j_format_version >= 2 && \ ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask)))) -#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001 +#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001 #define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001 #define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002 @@ -295,6 +297,8 @@ typedef struct journal_superblock_s #define JBD2_FEATURE_INCOMPAT_CSUM_V2 0x00000008 #define JBD2_FEATURE_INCOMPAT_CSUM_V3 0x00000010 +/* See "journal feature predicate functions" below */ + /* Features known to this kernel version: */ #define JBD2_KNOWN_COMPAT_FEATURES JBD2_FEATURE_COMPAT_CHECKSUM #define JBD2_KNOWN_ROCOMPAT_FEATURES 0 @@ -336,7 +340,69 @@ BUFFER_FNS(Freed, freed) BUFFER_FNS(Shadow, shadow) BUFFER_FNS(Verified, verified) -#include <linux/jbd_common.h> +static inline struct buffer_head *jh2bh(struct journal_head *jh) +{ + return jh->b_bh; +} + +static inline struct journal_head *bh2jh(struct buffer_head *bh) +{ + return bh->b_private; +} + +static inline void jbd_lock_bh_state(struct buffer_head *bh) +{ +#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_lock(BH_State, &bh->b_state); +#else + spin_lock(&bh->b_state_lock); +#endif +} + +static inline int jbd_trylock_bh_state(struct buffer_head *bh) +{ +#ifndef CONFIG_PREEMPT_RT_BASE + return bit_spin_trylock(BH_State, &bh->b_state); +#else + return spin_trylock(&bh->b_state_lock); +#endif +} + +static inline int jbd_is_locked_bh_state(struct buffer_head *bh) +{ +#ifndef CONFIG_PREEMPT_RT_BASE + return bit_spin_is_locked(BH_State, &bh->b_state); +#else + return spin_is_locked(&bh->b_state_lock); +#endif +} + +static inline void jbd_unlock_bh_state(struct buffer_head *bh) +{ +#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_unlock(BH_State, &bh->b_state); +#else + spin_unlock(&bh->b_state_lock); +#endif +} + +static inline void jbd_lock_bh_journal_head(struct buffer_head *bh) +{ +#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_lock(BH_JournalHead, &bh->b_state); +#else + spin_lock(&bh->b_journal_head_lock); +#endif +} + +static inline void jbd_unlock_bh_journal_head(struct buffer_head *bh) +{ +#ifndef CONFIG_PREEMPT_RT_BASE + bit_spin_unlock(BH_JournalHead, &bh->b_state); +#else + spin_unlock(&bh->b_journal_head_lock); +#endif +} #define J_ASSERT(assert) BUG_ON(!(assert)) @@ -995,6 +1061,69 @@ struct journal_s __u32 j_csum_seed; }; +/* 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 && \ + ((j)->j_superblock->s_feature_compat & \ + cpu_to_be32(JBD2_FEATURE_COMPAT_##flagname)) != 0); \ +} \ +static inline void jbd2_set_feature_##name(journal_t *j) \ +{ \ + (j)->j_superblock->s_feature_compat |= \ + cpu_to_be32(JBD2_FEATURE_COMPAT_##flagname); \ +} \ +static inline void jbd2_clear_feature_##name(journal_t *j) \ +{ \ + (j)->j_superblock->s_feature_compat &= \ + ~cpu_to_be32(JBD2_FEATURE_COMPAT_##flagname); \ +} + +#define JBD2_FEATURE_RO_COMPAT_FUNCS(name, flagname) \ +static inline bool jbd2_has_feature_##name(journal_t *j) \ +{ \ + return ((j)->j_format_version >= 2 && \ + ((j)->j_superblock->s_feature_ro_compat & \ + cpu_to_be32(JBD2_FEATURE_RO_COMPAT_##flagname)) != 0); \ +} \ +static inline void jbd2_set_feature_##name(journal_t *j) \ +{ \ + (j)->j_superblock->s_feature_ro_compat |= \ + cpu_to_be32(JBD2_FEATURE_RO_COMPAT_##flagname); \ +} \ +static inline void jbd2_clear_feature_##name(journal_t *j) \ +{ \ + (j)->j_superblock->s_feature_ro_compat &= \ + ~cpu_to_be32(JBD2_FEATURE_RO_COMPAT_##flagname); \ +} + +#define JBD2_FEATURE_INCOMPAT_FUNCS(name, flagname) \ +static inline bool jbd2_has_feature_##name(journal_t *j) \ +{ \ + return ((j)->j_format_version >= 2 && \ + ((j)->j_superblock->s_feature_incompat & \ + cpu_to_be32(JBD2_FEATURE_INCOMPAT_##flagname)) != 0); \ +} \ +static inline void jbd2_set_feature_##name(journal_t *j) \ +{ \ + (j)->j_superblock->s_feature_incompat |= \ + cpu_to_be32(JBD2_FEATURE_INCOMPAT_##flagname); \ +} \ +static inline void jbd2_clear_feature_##name(journal_t *j) \ +{ \ + (j)->j_superblock->s_feature_incompat &= \ + ~cpu_to_be32(JBD2_FEATURE_INCOMPAT_##flagname); \ +} + +JBD2_FEATURE_COMPAT_FUNCS(checksum, CHECKSUM) + +JBD2_FEATURE_INCOMPAT_FUNCS(revoke, REVOKE) +JBD2_FEATURE_INCOMPAT_FUNCS(64bit, 64BIT) +JBD2_FEATURE_INCOMPAT_FUNCS(async_commit, ASYNC_COMMIT) +JBD2_FEATURE_INCOMPAT_FUNCS(csum2, CSUM_V2) +JBD2_FEATURE_INCOMPAT_FUNCS(csum3, CSUM_V3) + /* * Journal flag definitions */ @@ -1007,6 +1136,7 @@ struct journal_s #define JBD2_ABORT_ON_SYNCDATA_ERR 0x040 /* Abort the journal on file * data write error in ordered * mode */ +#define JBD2_REC_ERR 0x080 /* The errno in the sb has been recorded */ /* * Function declarations for the journaling transaction and buffer @@ -1299,13 +1429,17 @@ 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 bool jbd2_journal_has_csum_v2or3_feature(journal_t *j) +{ + return jbd2_has_feature_csum2(j) || jbd2_has_feature_csum3(j); +} + 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; + WARN_ON_ONCE(jbd2_journal_has_csum_v2or3_feature(journal) && + journal->j_chksum_driver == NULL); - return 0; + return journal->j_chksum_driver != NULL; } /* @@ -1405,4 +1539,7 @@ static inline tid_t jbd2_get_latest_transaction(journal_t *journal) #endif /* __KERNEL__ */ +#define EFSBADCRC EBADMSG /* Bad CRC detected */ +#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ + #endif /* _LINUX_JBD2_H */ |