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openSUSE:12.2
s390-tools
s390-tools-sles11sp2-cmsfs-fuse-disk_full.patch
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File s390-tools-sles11sp2-cmsfs-fuse-disk_full.patch of Package s390-tools
Description: cmsfs-fuse: Update the number of records on disk full condition Symptom: Unreadable file after disk ran full. Problem: If the disk runs out of free blocks, the highest record number, stored in a pointer entry for a variable format record, can be too high. Solution: Update the highest record number according to the number of records written before the disk is full. Problem-ID: 75963 --- cmsfs-fuse/cmsfs-fuse.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) --- a/cmsfs-fuse/cmsfs-fuse.c +++ b/cmsfs-fuse/cmsfs-fuse.c @@ -180,6 +180,8 @@ struct write_state { int var_record_state; /* remaining record bytes for a write request */ int var_record_len; + /* only used for var records hi_record_nr by now */ + int var_records_written; }; /* @@ -3536,8 +3538,11 @@ static int write_prepare_block(struct fi f->write_ptr = get_filled_block(); else f->write_ptr = get_zero_block(); - if (f->write_ptr < 0) - return f->write_ptr; + if (f->write_ptr < 0) { + /* reset to catch subsequent writes */ + f->write_ptr = 0; + return -ENOSPC; + } new_block = 1; len = cmsfs.blksize; } else @@ -3577,6 +3582,7 @@ static int write_var_header(struct file f->write_ptr++; f->wstate->block_free--; f->wstate->var_record_state = RWS_HEADER_COMPLETE; + f->wstate->var_records_written++; return 1; } @@ -3592,6 +3598,7 @@ static int write_var_header(struct file f->wstate->block_free -= 2; f->wstate->var_record_len = vheader; f->wstate->var_record_state = RWS_HEADER_COMPLETE; + f->wstate->var_records_written++; return 2; } else { /* len = 1, write first header byte */ @@ -3939,6 +3946,7 @@ static void reset_write_state(struct fil { f->wstate->var_record_state = RWS_RECORD_COMPLETE; f->wstate->var_record_len = 0; + f->wstate->var_records_written = 0; } /* @@ -3984,9 +3992,16 @@ static int write_append(struct file *f, for (i = 0; i < nblocks; i++) { len = extend_block(f, buf, size, rlen); if (len < 0) { - if (copied > 0) + if (copied > 0) { + /* + * Not all records may be written, need to + * update nrecords to store a correct + * hi_record_nr in the last vptr. + */ + if (f->fst->record_format == RECORD_LEN_VARIABLE) + nrecords = f->wstate->var_records_written; goto out; - else + } else return len; } copied += len;
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