Author: kib Date: Tue Mar 19 15:01:50 2013 New Revision: 248519 URL: http://svnweb.freebsd.org/changeset/base/248519
Log: Support unmapped i/o for the md(4). The vnode-backed md(4) has to map the unmapped bio because VOP_READ() and VOP_WRITE() interfaces do not allow to pass unmapped requests to the filesystem. Vnode-backed md(4) uses pbufs instead of relying on the bio_transient_map, to avoid usual md deadlock. Sponsored by: The FreeBSD Foundation Tested by: pho, scottl Modified: head/sys/cam/ata/ata_da.c head/sys/cam/cam_ccb.h head/sys/cam/scsi/scsi_all.c head/sys/cam/scsi/scsi_all.h head/sys/cam/scsi/scsi_cd.c head/sys/cam/scsi/scsi_da.c Modified: head/sys/cam/ata/ata_da.c ============================================================================== --- head/sys/cam/ata/ata_da.c Tue Mar 19 14:53:23 2013 (r248518) +++ head/sys/cam/ata/ata_da.c Tue Mar 19 15:01:50 2013 (r248519) @@ -1167,6 +1167,8 @@ adaregister(struct cam_periph *periph, v ((softc->flags & ADA_FLAG_CAN_CFA) && !(softc->flags & ADA_FLAG_CAN_48BIT))) softc->disk->d_flags |= DISKFLAG_CANDELETE; + if ((cpi.hba_misc & PIM_UNMAPPED) != 0) + softc->disk->d_flags |= DISKFLAG_UNMAPPED_BIO; strlcpy(softc->disk->d_descr, cgd->ident_data.model, MIN(sizeof(softc->disk->d_descr), sizeof(cgd->ident_data.model))); strlcpy(softc->disk->d_ident, cgd->ident_data.serial, @@ -1431,13 +1433,19 @@ adastart(struct cam_periph *periph, unio return; } #endif + KASSERT((bp->bio_flags & BIO_UNMAPPED) == 0 || + round_page(bp->bio_bcount + bp->bio_ma_offset) / + PAGE_SIZE == bp->bio_ma_n, + ("Short bio %p", bp)); cam_fill_ataio(ataio, ada_retry_count, adadone, - bp->bio_cmd == BIO_READ ? - CAM_DIR_IN : CAM_DIR_OUT, + (bp->bio_cmd == BIO_READ ? CAM_DIR_IN : + CAM_DIR_OUT) | ((bp->bio_flags & BIO_UNMAPPED) + != 0 ? CAM_DATA_BIO : 0), tag_code, - bp->bio_data, + ((bp->bio_flags & BIO_UNMAPPED) != 0) ? (void *)bp : + bp->bio_data, bp->bio_bcount, ada_default_timeout*1000); Modified: head/sys/cam/cam_ccb.h ============================================================================== --- head/sys/cam/cam_ccb.h Tue Mar 19 14:53:23 2013 (r248518) +++ head/sys/cam/cam_ccb.h Tue Mar 19 15:01:50 2013 (r248519) @@ -42,7 +42,6 @@ #include <cam/scsi/scsi_all.h> #include <cam/ata/ata_all.h> - /* General allocation length definitions for CCB structures */ #define IOCDBLEN CAM_MAX_CDBLEN /* Space for CDB bytes/pointer */ #define VUHBALEN 14 /* Vendor Unique HBA length */ @@ -572,7 +571,8 @@ typedef enum { PIM_NOINITIATOR = 0x20, /* Initiator role not supported. */ PIM_NOBUSRESET = 0x10, /* User has disabled initial BUS RESET */ PIM_NO_6_BYTE = 0x08, /* Do not send 6-byte commands */ - PIM_SEQSCAN = 0x04 /* Do bus scans sequentially, not in parallel */ + PIM_SEQSCAN = 0x04, /* Do bus scans sequentially, not in parallel */ + PIM_UNMAPPED = 0x02, } pi_miscflag; /* Path Inquiry CCB */ Modified: head/sys/cam/scsi/scsi_all.c ============================================================================== --- head/sys/cam/scsi/scsi_all.c Tue Mar 19 14:53:23 2013 (r248518) +++ head/sys/cam/scsi/scsi_all.c Tue Mar 19 15:01:50 2013 (r248519) @@ -5679,7 +5679,11 @@ scsi_read_write(struct ccb_scsiio *csio, u_int8_t *data_ptr, u_int32_t dxfer_len, u_int8_t sense_len, u_int32_t timeout) { + int read; u_int8_t cdb_len; + + read = (readop & SCSI_RW_DIRMASK) == SCSI_RW_READ; + /* * Use the smallest possible command to perform the operation * as some legacy hardware does not support the 10 byte commands. @@ -5696,7 +5700,7 @@ scsi_read_write(struct ccb_scsiio *csio, struct scsi_rw_6 *scsi_cmd; scsi_cmd = (struct scsi_rw_6 *)&csio->cdb_io.cdb_bytes; - scsi_cmd->opcode = readop ? READ_6 : WRITE_6; + scsi_cmd->opcode = read ? READ_6 : WRITE_6; scsi_ulto3b(lba, scsi_cmd->addr); scsi_cmd->length = block_count & 0xff; scsi_cmd->control = 0; @@ -5715,7 +5719,7 @@ scsi_read_write(struct ccb_scsiio *csio, struct scsi_rw_10 *scsi_cmd; scsi_cmd = (struct scsi_rw_10 *)&csio->cdb_io.cdb_bytes; - scsi_cmd->opcode = readop ? READ_10 : WRITE_10; + scsi_cmd->opcode = read ? READ_10 : WRITE_10; scsi_cmd->byte2 = byte2; scsi_ulto4b(lba, scsi_cmd->addr); scsi_cmd->reserved = 0; @@ -5738,7 +5742,7 @@ scsi_read_write(struct ccb_scsiio *csio, struct scsi_rw_12 *scsi_cmd; scsi_cmd = (struct scsi_rw_12 *)&csio->cdb_io.cdb_bytes; - scsi_cmd->opcode = readop ? READ_12 : WRITE_12; + scsi_cmd->opcode = read ? READ_12 : WRITE_12; scsi_cmd->byte2 = byte2; scsi_ulto4b(lba, scsi_cmd->addr); scsi_cmd->reserved = 0; @@ -5760,7 +5764,7 @@ scsi_read_write(struct ccb_scsiio *csio, struct scsi_rw_16 *scsi_cmd; scsi_cmd = (struct scsi_rw_16 *)&csio->cdb_io.cdb_bytes; - scsi_cmd->opcode = readop ? READ_16 : WRITE_16; + scsi_cmd->opcode = read ? READ_16 : WRITE_16; scsi_cmd->byte2 = byte2; scsi_u64to8b(lba, scsi_cmd->addr); scsi_cmd->reserved = 0; @@ -5771,7 +5775,8 @@ scsi_read_write(struct ccb_scsiio *csio, cam_fill_csio(csio, retries, cbfcnp, - /*flags*/readop ? CAM_DIR_IN : CAM_DIR_OUT, + (read ? CAM_DIR_IN : CAM_DIR_OUT) | + ((readop & SCSI_RW_BIO) != 0 ? CAM_DATA_BIO : 0), tag_action, data_ptr, dxfer_len, Modified: head/sys/cam/scsi/scsi_all.h ============================================================================== --- head/sys/cam/scsi/scsi_all.h Tue Mar 19 14:53:23 2013 (r248518) +++ head/sys/cam/scsi/scsi_all.h Tue Mar 19 15:01:50 2013 (r248519) @@ -2354,6 +2354,10 @@ void scsi_write_buffer(struct ccb_scsiio uint8_t *data_ptr, uint32_t param_list_length, uint8_t sense_len, uint32_t timeout); +#define SCSI_RW_READ 0x0001 +#define SCSI_RW_WRITE 0x0002 +#define SCSI_RW_DIRMASK 0x0003 +#define SCSI_RW_BIO 0x1000 void scsi_read_write(struct ccb_scsiio *csio, u_int32_t retries, void (*cbfcnp)(struct cam_periph *, union ccb *), u_int8_t tag_action, int readop, u_int8_t byte2, Modified: head/sys/cam/scsi/scsi_cd.c ============================================================================== --- head/sys/cam/scsi/scsi_cd.c Tue Mar 19 14:53:23 2013 (r248518) +++ head/sys/cam/scsi/scsi_cd.c Tue Mar 19 15:01:50 2013 (r248519) @@ -1575,7 +1575,8 @@ cdstart(struct cam_periph *periph, union /*retries*/ cd_retry_count, /* cbfcnp */ cddone, MSG_SIMPLE_Q_TAG, - /* read */bp->bio_cmd == BIO_READ, + /* read */bp->bio_cmd == BIO_READ ? + SCSI_RW_READ : SCSI_RW_WRITE, /* byte2 */ 0, /* minimum_cmd_size */ 10, /* lba */ bp->bio_offset / Modified: head/sys/cam/scsi/scsi_da.c ============================================================================== --- head/sys/cam/scsi/scsi_da.c Tue Mar 19 14:53:23 2013 (r248518) +++ head/sys/cam/scsi/scsi_da.c Tue Mar 19 15:01:50 2013 (r248519) @@ -1184,7 +1184,7 @@ dadump(void *arg, void *virtual, vm_offs /*retries*/0, dadone, MSG_ORDERED_Q_TAG, - /*read*/FALSE, + /*read*/SCSI_RW_WRITE, /*byte2*/0, /*minimum_cmd_size*/ softc->minimum_cmd_size, offset / secsize, @@ -1757,6 +1757,8 @@ daregister(struct cam_periph *periph, vo softc->disk->d_flags = 0; if ((softc->quirks & DA_Q_NO_SYNC_CACHE) == 0) softc->disk->d_flags |= DISKFLAG_CANFLUSHCACHE; + if ((cpi.hba_misc & PIM_UNMAPPED) != 0) + softc->disk->d_flags |= DISKFLAG_UNMAPPED_BIO; cam_strvis(softc->disk->d_descr, cgd->inq_data.vendor, sizeof(cgd->inq_data.vendor), sizeof(softc->disk->d_descr)); strlcat(softc->disk->d_descr, " ", sizeof(softc->disk->d_descr)); @@ -1985,14 +1987,18 @@ dastart(struct cam_periph *periph, union /*retries*/da_retry_count, /*cbfcnp*/dadone, /*tag_action*/tag_code, - /*read_op*/bp->bio_cmd - == BIO_READ, + /*read_op*/(bp->bio_cmd == BIO_READ ? + SCSI_RW_READ : SCSI_RW_WRITE) | + ((bp->bio_flags & BIO_UNMAPPED) != 0 ? + SCSI_RW_BIO : 0), /*byte2*/0, softc->minimum_cmd_size, /*lba*/bp->bio_pblkno, /*block_count*/bp->bio_bcount / softc->params.secsize, - /*data_ptr*/ bp->bio_data, + /*data_ptr*/ (bp->bio_flags & + BIO_UNMAPPED) != 0 ? (void *)bp : + bp->bio_data, /*dxfer_len*/ bp->bio_bcount, /*sense_len*/SSD_FULL_SIZE, da_default_timeout * 1000); _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"