--- zzzz-none-000/linux-3.10.107/fs/jbd2/revoke.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/fs/jbd2/revoke.c 2021-02-04 17:41:59.000000000 +0000 @@ -91,8 +91,9 @@ #include #include #include -#endif #include +#include +#endif static struct kmem_cache *jbd2_revoke_record_cache; static struct kmem_cache *jbd2_revoke_table_cache; @@ -122,23 +123,17 @@ #ifdef __KERNEL__ static void write_one_revoke_record(journal_t *, transaction_t *, - struct journal_head **, int *, + struct list_head *, + struct buffer_head **, int *, struct jbd2_revoke_record_s *, int); -static void flush_descriptor(journal_t *, struct journal_head *, int, int); +static void flush_descriptor(journal_t *, struct buffer_head *, int, int); #endif /* Utility functions to maintain the revoke table */ -/* Borrowed from buffer.c: this is a tried and tested block hash function */ static inline int hash(journal_t *journal, unsigned long long block) { - struct jbd2_revoke_table_s *table = journal->j_revoke; - int hash_shift = table->hash_shift; - int hash = (int)block ^ (int)((block >> 31) >> 1); - - return ((hash << (hash_shift - 6)) ^ - (hash >> 13) ^ - (hash << (hash_shift - 12))) & (table->hash_size - 1); + return hash_64(block, journal->j_revoke->hash_shift); } static int insert_revoke_hash(journal_t *journal, unsigned long long blocknr, @@ -146,11 +141,13 @@ { struct list_head *hash_list; struct jbd2_revoke_record_s *record; + gfp_t gfp_mask = GFP_NOFS; -repeat: - record = kmem_cache_alloc(jbd2_revoke_record_cache, GFP_NOFS); + if (journal_oom_retry) + gfp_mask |= __GFP_NOFAIL; + record = kmem_cache_alloc(jbd2_revoke_record_cache, gfp_mask); if (!record) - goto oom; + return -ENOMEM; record->sequence = seq; record->blocknr = blocknr; @@ -159,13 +156,6 @@ list_add(&record->hash, hash_list); spin_unlock(&journal->j_revoke_lock); return 0; - -oom: - if (!journal_oom_retry) - return -ENOMEM; - jbd_debug(1, "ENOMEM in %s, retrying\n", __func__); - yield(); - goto repeat; } /* Find a revoke record in the journal's hash table. */ @@ -531,9 +521,10 @@ */ void jbd2_journal_write_revoke_records(journal_t *journal, transaction_t *transaction, + struct list_head *log_bufs, int write_op) { - struct journal_head *descriptor; + struct buffer_head *descriptor; struct jbd2_revoke_record_s *record; struct jbd2_revoke_table_s *revoke; struct list_head *hash_list; @@ -553,7 +544,7 @@ while (!list_empty(hash_list)) { record = (struct jbd2_revoke_record_s *) hash_list->next; - write_one_revoke_record(journal, transaction, + write_one_revoke_record(journal, transaction, log_bufs, &descriptor, &offset, record, write_op); count++; @@ -573,14 +564,15 @@ static void write_one_revoke_record(journal_t *journal, transaction_t *transaction, - struct journal_head **descriptorp, + struct list_head *log_bufs, + struct buffer_head **descriptorp, int *offsetp, struct jbd2_revoke_record_s *record, int write_op) { int csum_size = 0; - struct journal_head *descriptor; - int offset; + struct buffer_head *descriptor; + int sz, offset; journal_header_t *header; /* If we are already aborting, this all becomes a noop. We @@ -594,12 +586,17 @@ offset = *offsetp; /* Do we need to leave space at the end for a checksum? */ - if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_CSUM_V2)) + if (jbd2_journal_has_csum_v2or3(journal)) csum_size = sizeof(struct jbd2_journal_revoke_tail); + if (jbd2_has_feature_64bit(journal)) + sz = 8; + else + sz = 4; + /* Make sure we have a descriptor with space left for the record */ if (descriptor) { - if (offset >= journal->j_blocksize - csum_size) { + if (offset + sz > journal->j_blocksize - csum_size) { flush_descriptor(journal, descriptor, offset, write_op); descriptor = NULL; } @@ -609,48 +606,42 @@ descriptor = jbd2_journal_get_descriptor_buffer(journal); if (!descriptor) return; - header = (journal_header_t *) &jh2bh(descriptor)->b_data[0]; + header = (journal_header_t *)descriptor->b_data; header->h_magic = cpu_to_be32(JBD2_MAGIC_NUMBER); header->h_blocktype = cpu_to_be32(JBD2_REVOKE_BLOCK); header->h_sequence = cpu_to_be32(transaction->t_tid); /* Record it so that we can wait for IO completion later */ - JBUFFER_TRACE(descriptor, "file as BJ_LogCtl"); - jbd2_journal_file_buffer(descriptor, transaction, BJ_LogCtl); + BUFFER_TRACE(descriptor, "file in log_bufs"); + jbd2_file_log_bh(log_bufs, descriptor); offset = sizeof(jbd2_journal_revoke_header_t); *descriptorp = descriptor; } - if (JBD2_HAS_INCOMPAT_FEATURE(journal, JBD2_FEATURE_INCOMPAT_64BIT)) { - * ((__be64 *)(&jh2bh(descriptor)->b_data[offset])) = + if (jbd2_has_feature_64bit(journal)) + * ((__be64 *)(&descriptor->b_data[offset])) = cpu_to_be64(record->blocknr); - offset += 8; - - } else { - * ((__be32 *)(&jh2bh(descriptor)->b_data[offset])) = + else + * ((__be32 *)(&descriptor->b_data[offset])) = cpu_to_be32(record->blocknr); - offset += 4; - } + offset += sz; *offsetp = offset; } -static void jbd2_revoke_csum_set(journal_t *j, - struct journal_head *descriptor) +static void jbd2_revoke_csum_set(journal_t *j, struct buffer_head *bh) { struct jbd2_journal_revoke_tail *tail; __u32 csum; - if (!JBD2_HAS_INCOMPAT_FEATURE(j, JBD2_FEATURE_INCOMPAT_CSUM_V2)) + if (!jbd2_journal_has_csum_v2or3(j)) return; - tail = (struct jbd2_journal_revoke_tail *) - (jh2bh(descriptor)->b_data + j->j_blocksize - + tail = (struct jbd2_journal_revoke_tail *)(bh->b_data + j->j_blocksize - sizeof(struct jbd2_journal_revoke_tail)); tail->r_checksum = 0; - csum = jbd2_chksum(j, j->j_csum_seed, jh2bh(descriptor)->b_data, - j->j_blocksize); + csum = jbd2_chksum(j, j->j_csum_seed, bh->b_data, j->j_blocksize); tail->r_checksum = cpu_to_be32(csum); } @@ -662,25 +653,24 @@ */ static void flush_descriptor(journal_t *journal, - struct journal_head *descriptor, + struct buffer_head *descriptor, int offset, int write_op) { jbd2_journal_revoke_header_t *header; - struct buffer_head *bh = jh2bh(descriptor); if (is_journal_aborted(journal)) { - put_bh(bh); + put_bh(descriptor); return; } - header = (jbd2_journal_revoke_header_t *) jh2bh(descriptor)->b_data; + header = (jbd2_journal_revoke_header_t *)descriptor->b_data; header->r_count = cpu_to_be32(offset); jbd2_revoke_csum_set(journal, descriptor); - set_buffer_jwrite(bh); - BUFFER_TRACE(bh, "write"); - set_buffer_dirty(bh); - write_dirty_buffer(bh, write_op); + set_buffer_jwrite(descriptor); + BUFFER_TRACE(descriptor, "write"); + set_buffer_dirty(descriptor); + write_dirty_buffer(descriptor, write_op); } #endif