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Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs

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* 'for-linus' of git://oss.sgi.com/xfs/xfs:
  xfs: correctly decrement the extent buffer index in xfs_bmap_del_extent
  xfs: check for valid indices in xfs_iext_get_ext and xfs_iext_idx_to_irec
  xfs: fix up asserts in xfs_iflush_fork
  xfs: do not do pointer arithmetic on extent records
  xfs: do not use unchecked extent indices in xfs_bunmapi
  xfs: do not use unchecked extent indices in xfs_bmapi
  xfs: do not use unchecked extent indices in xfs_bmap_add_extent_*
  xfs: remove if_lastex
  xfs: remove the unused XFS_BMAPI_RSVBLOCKS flag
  xfs: do not discard alloc btree blocks
  xfs: add online discard support
This commit is contained in:
Linus Torvalds 2011-05-26 10:49:11 -07:00
commit 8a0599dd24
15 changed files with 368 additions and 320 deletions
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6
Documentation/filesystems/xfs.txt
View File

@ -39,6 +39,12 @@ When mounting an XFS filesystem, the following options are accepted.
drive level write caching to be enabled, for devices that
support write barriers.
discard
Issue command to let the block device reclaim space freed by the
filesystem. This is useful for SSD devices, thinly provisioned
LUNs and virtual machine images, but may have a performance
impact. This option is incompatible with the nodelaylog option.
dmapi
Enable the DMAPI (Data Management API) event callouts.
Use with the "mtpt" option.

29
fs/xfs/linux-2.6/xfs_discard.c
View File

@ -191,3 +191,32 @@ xfs_ioc_trim(
return -XFS_ERROR(EFAULT);
return 0;
}
int
xfs_discard_extents(
struct xfs_mount *mp,
struct list_head *list)
{
struct xfs_busy_extent *busyp;
int error = 0;
list_for_each_entry(busyp, list, list) {
trace_xfs_discard_extent(mp, busyp->agno, busyp->bno,
busyp->length);
error = -blkdev_issue_discard(mp->m_ddev_targp->bt_bdev,
XFS_AGB_TO_DADDR(mp, busyp->agno, busyp->bno),
XFS_FSB_TO_BB(mp, busyp->length),
GFP_NOFS, 0);
if (error && error != EOPNOTSUPP) {
xfs_info(mp,
"discard failed for extent [0x%llu,%u], error %d",
(unsigned long long)busyp->bno,
busyp->length,
error);
return error;
}
}
return 0;
}

2
fs/xfs/linux-2.6/xfs_discard.h
View File

@ -2,7 +2,9 @@
#define XFS_DISCARD_H 1
struct fstrim_range;
struct list_head;
extern int xfs_ioc_trim(struct xfs_mount *, struct fstrim_range __user *);
extern int xfs_discard_extents(struct xfs_mount *, struct list_head *);
#endif /* XFS_DISCARD_H */

18
fs/xfs/linux-2.6/xfs_super.c
View File

@ -110,8 +110,10 @@ mempool_t *xfs_ioend_pool;
#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
#define MNTOPT_QUOTANOENF "qnoenforce" /* same as uqnoenforce */
#define MNTOPT_DELAYLOG "delaylog" /* Delayed loging enabled */
#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed loging disabled */
#define MNTOPT_DELAYLOG "delaylog" /* Delayed logging enabled */
#define MNTOPT_NODELAYLOG "nodelaylog" /* Delayed logging disabled */
#define MNTOPT_DISCARD "discard" /* Discard unused blocks */
#define MNTOPT_NODISCARD "nodiscard" /* Do not discard unused blocks */
/*
* Table driven mount option parser.
@ -355,6 +357,10 @@ xfs_parseargs(
mp->m_flags |= XFS_MOUNT_DELAYLOG;
} else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
mp->m_flags &= ~XFS_MOUNT_DELAYLOG;
} else if (!strcmp(this_char, MNTOPT_DISCARD)) {
mp->m_flags |= XFS_MOUNT_DISCARD;
} else if (!strcmp(this_char, MNTOPT_NODISCARD)) {
mp->m_flags &= ~XFS_MOUNT_DISCARD;
} else if (!strcmp(this_char, "ihashsize")) {
xfs_warn(mp,
"ihashsize no longer used, option is deprecated.");
@ -388,6 +394,13 @@ xfs_parseargs(
return EINVAL;
}
if ((mp->m_flags & XFS_MOUNT_DISCARD) &&
!(mp->m_flags & XFS_MOUNT_DELAYLOG)) {
xfs_warn(mp,
"the discard option is incompatible with the nodelaylog option");
return EINVAL;
}
#ifndef CONFIG_XFS_QUOTA
if (XFS_IS_QUOTA_RUNNING(mp)) {
xfs_warn(mp, "quota support not available in this kernel.");
@ -488,6 +501,7 @@ xfs_showargs(
{ XFS_MOUNT_FILESTREAMS, "," MNTOPT_FILESTREAM },
{ XFS_MOUNT_GRPID, "," MNTOPT_GRPID },
{ XFS_MOUNT_DELAYLOG, "," MNTOPT_DELAYLOG },
{ XFS_MOUNT_DISCARD, "," MNTOPT_DISCARD },
{ 0, NULL }
};
static struct proc_xfs_info xfs_info_unset[] = {

3
fs/xfs/xfs_ag.h
View File

@ -187,6 +187,9 @@ struct xfs_busy_extent {
xfs_agnumber_t agno;
xfs_agblock_t bno;
xfs_extlen_t length;
unsigned int flags;
#define XFS_ALLOC_BUSY_DISCARDED 0x01 /* undergoing a discard op. */
#define XFS_ALLOC_BUSY_SKIP_DISCARD 0x02 /* do not discard */
};
/*

35
fs/xfs/xfs_alloc.c
View File

@ -2469,7 +2469,7 @@ xfs_free_extent(
error = xfs_free_ag_extent(tp, args.agbp, args.agno, args.agbno, len, 0);
if (!error)
xfs_alloc_busy_insert(tp, args.agno, args.agbno, len);
xfs_alloc_busy_insert(tp, args.agno, args.agbno, len, 0);
error0:
xfs_perag_put(args.pag);
return error;
@ -2480,7 +2480,8 @@ xfs_alloc_busy_insert(
struct xfs_trans *tp,
xfs_agnumber_t agno,
xfs_agblock_t bno,
xfs_extlen_t len)
xfs_extlen_t len,
unsigned int flags)
{
struct xfs_busy_extent *new;
struct xfs_busy_extent *busyp;
@ -2504,6 +2505,7 @@ xfs_alloc_busy_insert(
new->bno = bno;
new->length = len;
INIT_LIST_HEAD(&new->list);
new->flags = flags;
/* trace before insert to be able to see failed inserts */
trace_xfs_alloc_busy(tp->t_mountp, agno, bno, len);
@ -2608,6 +2610,18 @@ xfs_alloc_busy_update_extent(
xfs_agblock_t bbno = busyp->bno;
xfs_agblock_t bend = bbno + busyp->length;
/*
* This extent is currently being discarded. Give the thread
* performing the discard a chance to mark the extent unbusy
* and retry.
*/
if (busyp->flags & XFS_ALLOC_BUSY_DISCARDED) {
spin_unlock(&pag->pagb_lock);
delay(1);
spin_lock(&pag->pagb_lock);
return false;
}
/*
* If there is a busy extent overlapping a user allocation, we have
* no choice but to force the log and retry the search.
@ -2813,7 +2827,8 @@ restart:
* If this is a metadata allocation, try to reuse the busy
* extent instead of trimming the allocation.
*/
if (!args->userdata) {
if (!args->userdata &&
!(busyp->flags & XFS_ALLOC_BUSY_DISCARDED)) {
if (!xfs_alloc_busy_update_extent(args->mp, args->pag,
busyp, fbno, flen,
false))
@ -2979,10 +2994,16 @@ xfs_alloc_busy_clear_one(
kmem_free(busyp);
}
/*
* Remove all extents on the passed in list from the busy extents tree.
* If do_discard is set skip extents that need to be discarded, and mark
* these as undergoing a discard operation instead.
*/
void
xfs_alloc_busy_clear(
struct xfs_mount *mp,
struct list_head *list)
struct list_head *list,
bool do_discard)
{
struct xfs_busy_extent *busyp, *n;
struct xfs_perag *pag = NULL;
@ -2999,7 +3020,11 @@ xfs_alloc_busy_clear(
agno = busyp->agno;
}
xfs_alloc_busy_clear_one(mp, pag, busyp);
if (do_discard && busyp->length &&
!(busyp->flags & XFS_ALLOC_BUSY_SKIP_DISCARD))
busyp->flags = XFS_ALLOC_BUSY_DISCARDED;
else
xfs_alloc_busy_clear_one(mp, pag, busyp);
}
if (pag) {

5
fs/xfs/xfs_alloc.h
View File

@ -137,10 +137,11 @@ xfs_alloc_longest_free_extent(struct xfs_mount *mp,
#ifdef __KERNEL__
void
xfs_alloc_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
xfs_agblock_t bno, xfs_extlen_t len);
xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);
void
xfs_alloc_busy_clear(struct xfs_mount *mp, struct list_head *list);
xfs_alloc_busy_clear(struct xfs_mount *mp, struct list_head *list,
bool do_discard);
int
xfs_alloc_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,

3
fs/xfs/xfs_alloc_btree.c
View File

@ -120,7 +120,8 @@ xfs_allocbt_free_block(
if (error)
return error;
xfs_alloc_busy_insert(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1);
xfs_alloc_busy_insert(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1,
XFS_ALLOC_BUSY_SKIP_DISCARD);
xfs_trans_agbtree_delta(cur->bc_tp, -1);
return 0;
}

553
fs/xfs/xfs_bmap.c
View File

File diff suppressed because it is too large Load Diff

2
fs/xfs/xfs_bmap.h
View File

@ -69,7 +69,6 @@ typedef struct xfs_bmap_free
#define XFS_BMAPI_ENTIRE 0x004 /* return entire extent, not trimmed */
#define XFS_BMAPI_METADATA 0x008 /* mapping metadata not user data */
#define XFS_BMAPI_ATTRFORK 0x010 /* use attribute fork not data */
#define XFS_BMAPI_RSVBLOCKS 0x020 /* OK to alloc. reserved data blocks */
#define XFS_BMAPI_PREALLOC 0x040 /* preallocation op: unwritten space */
#define XFS_BMAPI_IGSTATE 0x080 /* Ignore state - */
/* combine contig. space */
@ -87,7 +86,6 @@ typedef struct xfs_bmap_free
{ XFS_BMAPI_ENTIRE, "ENTIRE" }, \
{ XFS_BMAPI_METADATA, "METADATA" }, \
{ XFS_BMAPI_ATTRFORK, "ATTRFORK" }, \
{ XFS_BMAPI_RSVBLOCKS, "RSVBLOCKS" }, \
{ XFS_BMAPI_PREALLOC, "PREALLOC" }, \
{ XFS_BMAPI_IGSTATE, "IGSTATE" }, \
{ XFS_BMAPI_CONTIG, "CONTIG" }, \

15
fs/xfs/xfs_inode.c
View File

@ -920,7 +920,6 @@ xfs_iread_extents(
/*
* We know that the size is valid (it's checked in iformat_btree)
*/
ifp->if_lastex = NULLEXTNUM;
ifp->if_bytes = ifp->if_real_bytes = 0;
ifp->if_flags |= XFS_IFEXTENTS;
xfs_iext_add(ifp, 0, nextents);
@ -2558,12 +2557,9 @@ xfs_iflush_fork(
case XFS_DINODE_FMT_EXTENTS:
ASSERT((ifp->if_flags & XFS_IFEXTENTS) ||
!(iip->ili_format.ilf_fields & extflag[whichfork]));
ASSERT((xfs_iext_get_ext(ifp, 0) != NULL) ||
(ifp->if_bytes == 0));
ASSERT((xfs_iext_get_ext(ifp, 0) == NULL) ||
(ifp->if_bytes > 0));
if ((iip->ili_format.ilf_fields & extflag[whichfork]) &&
(ifp->if_bytes > 0)) {
ASSERT(xfs_iext_get_ext(ifp, 0));
ASSERT(XFS_IFORK_NEXTENTS(ip, whichfork) > 0);
(void)xfs_iextents_copy(ip, (xfs_bmbt_rec_t *)cp,
whichfork);
@ -3112,6 +3108,8 @@ xfs_iext_get_ext(
xfs_extnum_t idx) /* index of target extent */
{
ASSERT(idx >= 0);
ASSERT(idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t));
if ((ifp->if_flags & XFS_IFEXTIREC) && (idx == 0)) {
return ifp->if_u1.if_ext_irec->er_extbuf;
} else if (ifp->if_flags & XFS_IFEXTIREC) {
@ -3191,7 +3189,6 @@ xfs_iext_add(
}
ifp->if_u1.if_extents = ifp->if_u2.if_inline_ext;
ifp->if_real_bytes = 0;
ifp->if_lastex = nextents + ext_diff;
}
/*
* Otherwise use a linear (direct) extent list.
@ -3886,8 +3883,10 @@ xfs_iext_idx_to_irec(
xfs_extnum_t page_idx = *idxp; /* extent index in target list */
ASSERT(ifp->if_flags & XFS_IFEXTIREC);
ASSERT(page_idx >= 0 && page_idx <=
ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t));
ASSERT(page_idx >= 0);
ASSERT(page_idx <= ifp->if_bytes / sizeof(xfs_bmbt_rec_t));
ASSERT(page_idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t) || realloc);
nlists = ifp->if_real_bytes / XFS_IEXT_BUFSZ;
erp_idx = 0;
low = 0;

1
fs/xfs/xfs_inode.h
View File

@ -67,7 +67,6 @@ typedef struct xfs_ifork {
short if_broot_bytes; /* bytes allocated for root */
unsigned char if_flags; /* per-fork flags */
unsigned char if_ext_max; /* max # of extent records */
xfs_extnum_t if_lastex; /* last if_extents used */
union {
xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
xfs_ext_irec_t *if_ext_irec; /* irec map file exts */

13
fs/xfs/xfs_log_cil.c
View File

@ -29,6 +29,7 @@
#include "xfs_mount.h"
#include "xfs_error.h"
#include "xfs_alloc.h"
#include "xfs_discard.h"
/*
* Perform initial CIL structure initialisation. If the CIL is not
@ -361,18 +362,28 @@ xlog_cil_committed(
int abort)
{
struct xfs_cil_ctx *ctx = args;
struct xfs_mount *mp = ctx->cil->xc_log->l_mp;
xfs_trans_committed_bulk(ctx->cil->xc_log->l_ailp, ctx->lv_chain,
ctx->start_lsn, abort);
xfs_alloc_busy_sort(&ctx->busy_extents);
xfs_alloc_busy_clear(ctx->cil->xc_log->l_mp, &ctx->busy_extents);
xfs_alloc_busy_clear(mp, &ctx->busy_extents,
(mp->m_flags & XFS_MOUNT_DISCARD) && !abort);
spin_lock(&ctx->cil->xc_cil_lock);
list_del(&ctx->committing);
spin_unlock(&ctx->cil->xc_cil_lock);
xlog_cil_free_logvec(ctx->lv_chain);
if (!list_empty(&ctx->busy_extents)) {
ASSERT(mp->m_flags & XFS_MOUNT_DISCARD);
xfs_discard_extents(mp, &ctx->busy_extents);
xfs_alloc_busy_clear(mp, &ctx->busy_extents, false);
}
kmem_free(ctx);
}

1
fs/xfs/xfs_mount.h
View File

@ -224,6 +224,7 @@ typedef struct xfs_mount {
#define XFS_MOUNT_FS_SHUTDOWN (1ULL << 4) /* atomic stop of all filesystem
operations, typically for
disk errors in metadata */
#define XFS_MOUNT_DISCARD (1ULL << 5) /* discard unused blocks */
#define XFS_MOUNT_RETERR (1ULL << 6) /* return alignment errors to
user */
#define XFS_MOUNT_NOALIGN (1ULL << 7) /* turn off stripe alignment

2
fs/xfs/xfs_trans.c
View File

@ -609,7 +609,7 @@ xfs_trans_free(
struct xfs_trans *tp)
{
xfs_alloc_busy_sort(&tp->t_busy);
xfs_alloc_busy_clear(tp->t_mountp, &tp->t_busy);
xfs_alloc_busy_clear(tp->t_mountp, &tp->t_busy, false);
atomic_dec(&tp->t_mountp->m_active_trans);
xfs_trans_free_dqinfo(tp);