Date: Wed, 26 Jan 2011 18:03:03 +0000 (UTC) From: Warner Losh <imp@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r217889 - projects/graid/head/sys/geom/raid Message-ID: <201101261803.p0QI33wf084764@svn.freebsd.org>
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Author: imp Date: Wed Jan 26 18:03:03 2011 New Revision: 217889 URL: http://svn.freebsd.org/changeset/base/217889 Log: Define cflags for our I/Os so we can properly mark them for SYNC and REMAP operations. Add some comments for some of the events. Modified: projects/graid/head/sys/geom/raid/g_raid.h Modified: projects/graid/head/sys/geom/raid/g_raid.h ============================================================================== --- projects/graid/head/sys/geom/raid/g_raid.h Wed Jan 26 17:31:03 2011 (r217888) +++ projects/graid/head/sys/geom/raid/g_raid.h Wed Jan 26 18:03:03 2011 (r217889) @@ -76,8 +76,28 @@ extern struct g_class g_raid_class; } \ } while (0) -#define G_RAID_BIO_FLAG_REGULAR 0x01 -#define G_RAID_BIO_FLAG_SYNC 0x02 +/* + * Flags we use to distinguish I/O initiated by the TR layer to maintain + * the volume's characteristics, fix subdisks, extra copies of data, etc. + * + * G_RAID_BIO_FLAG_SYNC I/O to update an extra copy of the data + * for RAID volumes that maintain extra data + * and need to rebuild that data. + * G_RAID_BIO_FLAG_REMAP I/O done to try to provoke a subdisk into + * doing some desirable action such as bad + * block remapping after we detect a bad part + * of the disk. + * + * and the following meta item: + * G_RAID_BIO_FLAG_SPECIAL And of the I/O flags that need to make it + * through the range locking which would + * otherwise defer the I/O until after that + * range is unlocked. + */ +#define G_RAID_BIO_FLAG_SYNC 0x01 +#define G_RAID_BIO_FLAG_REMAP 0x02 +#define G_RAID_BIO_FLAG_SPECIAL \ + (G_RAID_BIO_FLAG_SYNC|G_RAID_BIO_FLAG_REMAP) #define G_RAID_LOCK_PENDING 0x1 struct g_raid_lock { @@ -131,9 +151,10 @@ struct g_raid_disk { #define G_RAID_SUBDISK_S_RESYNC 0x05 /* Dirty + check/repair. */ #define G_RAID_SUBDISK_S_ACTIVE 0x06 /* Usable. */ -#define G_RAID_SUBDISK_E_NEW 0x01 -#define G_RAID_SUBDISK_E_FAILED 0x02 -#define G_RAID_SUBDISK_E_DISCONNECTED 0x03 +#define G_RAID_SUBDISK_E_NEW 0x01 /* A new subdisk has arrived */ +#define G_RAID_SUBDISK_E_FAILED 0x02 /* A subdisk failed, but remains in volume */ +#define G_RAID_SUBDISK_E_DISCONNECTED 0x03 /* A subdisk removed from volume. */ +#define G_RAID_SUBDISK_E_FIRST_TR_PRIVATE 0x80 /* translation private events */ struct g_raid_subdisk { struct g_raid_softc *sd_softc; /* Back-pointer to softc. */
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