From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (Postfix) with ESMTP id D38717FBB for ; Thu, 25 Aug 2016 18:43:04 -0500 (CDT) Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by relay2.corp.sgi.com (Postfix) with ESMTP id 9A3F5304043 for ; Thu, 25 Aug 2016 16:43:04 -0700 (PDT) Received: from aserp1040.oracle.com (aserp1040.oracle.com [141.146.126.69]) by cuda.sgi.com with ESMTP id ca037RmKMmlr5XEm (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO) for ; Thu, 25 Aug 2016 16:43:03 -0700 (PDT) Subject: [PATCH 25/25] xfs: query the per-AG reservation counters From: "Darrick J. Wong" Date: Thu, 25 Aug 2016 16:42:58 -0700 Message-ID: <147216857818.3108.11355542277200889786.stgit@birch.djwong.org> In-Reply-To: <147216841262.3108.10746252464845687338.stgit@birch.djwong.org> References: <147216841262.3108.10746252464845687338.stgit@birch.djwong.org> MIME-Version: 1.0 List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: david@fromorbit.com, darrick.wong@oracle.com Cc: linux-xfs@vger.kernel.org, xfs@oss.sgi.com Establish an ioctl for userspace to query the original and current per-AG reservation counts. This will be used by xfs_scrub to check that the vfs counters are at least somewhat sane. Signed-off-by: Darrick J. Wong --- fs/xfs/libxfs/xfs_fs.h | 10 ++++++++++ fs/xfs/xfs_fsops.c | 29 +++++++++++++++++++++++++++++ fs/xfs/xfs_fsops.h | 2 ++ fs/xfs/xfs_ioctl.c | 16 ++++++++++++++++ 4 files changed, 57 insertions(+) diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 211c874..f273e76 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -556,6 +556,15 @@ struct xfs_scrub_metadata { #define XFS_SCRUB_FLAGS_ALL 0x0 /* no flags yet */ /* + * AG reserved block counters + */ +struct xfs_fsop_ag_resblks { + __u64 resblks; /* blocks reserved now */ + __u64 resblks_orig; /* blocks reserved at mount time */ + __u64 reserved[2]; +}; + +/* * ioctl limits */ #ifdef XATTR_LIST_MAX @@ -631,6 +640,7 @@ struct xfs_scrub_metadata { #define XFS_IOC_ATTRMULTI_BY_HANDLE _IOW ('X', 123, struct xfs_fsop_attrmulti_handlereq) #define XFS_IOC_FSGEOMETRY _IOR ('X', 124, struct xfs_fsop_geom) #define XFS_IOC_GOINGDOWN _IOR ('X', 125, __uint32_t) +#define XFS_IOC_GET_AG_RESBLKS _IOR ('X', 126, struct xfs_fsop_ag_resblks) /* XFS_IOC_GETFSUUID ---------- deprecated 140 */ /* reflink ioctls; these MUST match the btrfs ioctl definitions */ diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index 9880eeb..9d7984d 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -44,6 +44,7 @@ #include "xfs_filestream.h" #include "xfs_rmap.h" #include "xfs_ag_resv.h" +#include "xfs_fs.h" /* * File system operations @@ -1044,3 +1045,31 @@ xfs_fs_unreserve_ag_blocks( if (error) xfs_warn(mp, "Error %d unreserving metadata blocks.", error); } + +/* Query the per-AG reservations to see how many blocks we have reserved. */ +int +xfs_fs_get_ag_reserve_blocks( + struct xfs_mount *mp, + struct xfs_fsop_ag_resblks *out) +{ + struct xfs_ag_resv *r; + struct xfs_perag *pag; + xfs_agnumber_t agno; + + out->resblks = 0; + out->resblks_orig = 0; + out->reserved[0] = out->reserved[1] = 0; + + for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) { + pag = xfs_perag_get(mp, agno); + r = xfs_perag_resv(pag, XFS_AG_RESV_METADATA); + out->resblks += r->ar_reserved; + out->resblks_orig += r->ar_asked; + r = xfs_perag_resv(pag, XFS_AG_RESV_AGFL); + out->resblks += r->ar_reserved; + out->resblks_orig += r->ar_asked; + xfs_perag_put(pag); + } + + return 0; +} diff --git a/fs/xfs/xfs_fsops.h b/fs/xfs/xfs_fsops.h index 71e32480..58b584b 100644 --- a/fs/xfs/xfs_fsops.h +++ b/fs/xfs/xfs_fsops.h @@ -25,6 +25,8 @@ extern int xfs_fs_counts(xfs_mount_t *mp, xfs_fsop_counts_t *cnt); extern int xfs_reserve_blocks(xfs_mount_t *mp, __uint64_t *inval, xfs_fsop_resblks_t *outval); extern int xfs_fs_goingdown(xfs_mount_t *mp, __uint32_t inflags); +extern int xfs_fs_get_ag_reserve_blocks(struct xfs_mount *mp, + struct xfs_fsop_ag_resblks *out); extern void xfs_fs_reserve_ag_blocks(struct xfs_mount *mp); extern void xfs_fs_unreserve_ag_blocks(struct xfs_mount *mp); diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 65f0c03..2a61268 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -1993,6 +1993,22 @@ xfs_file_ioctl( return 0; } + case XFS_IOC_GET_AG_RESBLKS: { + struct xfs_fsop_ag_resblks out; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + error = xfs_fs_get_ag_reserve_blocks(mp, &out); + if (error) + return error; + + if (copy_to_user(arg, &out, sizeof(out))) + return -EFAULT; + + return 0; + } + case XFS_IOC_FSGROWFSDATA: { xfs_growfs_data_t in; _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs