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![Jie Liu](/assets/img/avatar_default.png)
Introduce xfs_bulkstat_ag_ichunk() to process inodes in chunk with a pointer to a formatter function that will iget the inode and fill in the appropriate structure. Refactor xfs_bulkstat() with it. Signed-off-by: Jie Liu <jeff.liu@oracle.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
663 lines
17 KiB
C
663 lines
17 KiB
C
/*
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* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_shared.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_inum.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_mount.h"
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#include "xfs_inode.h"
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#include "xfs_btree.h"
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#include "xfs_ialloc.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_itable.h"
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#include "xfs_error.h"
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#include "xfs_trace.h"
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#include "xfs_icache.h"
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#include "xfs_dinode.h"
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STATIC int
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xfs_internal_inum(
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xfs_mount_t *mp,
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xfs_ino_t ino)
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{
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return (ino == mp->m_sb.sb_rbmino || ino == mp->m_sb.sb_rsumino ||
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(xfs_sb_version_hasquota(&mp->m_sb) &&
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xfs_is_quota_inode(&mp->m_sb, ino)));
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}
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/*
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* Return stat information for one inode.
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* Return 0 if ok, else errno.
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*/
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int
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xfs_bulkstat_one_int(
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struct xfs_mount *mp, /* mount point for filesystem */
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xfs_ino_t ino, /* inode to get data for */
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void __user *buffer, /* buffer to place output in */
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int ubsize, /* size of buffer */
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bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
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int *ubused, /* bytes used by me */
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int *stat) /* BULKSTAT_RV_... */
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{
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struct xfs_icdinode *dic; /* dinode core info pointer */
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struct xfs_inode *ip; /* incore inode pointer */
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struct xfs_bstat *buf; /* return buffer */
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int error = 0; /* error value */
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*stat = BULKSTAT_RV_NOTHING;
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if (!buffer || xfs_internal_inum(mp, ino))
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return -EINVAL;
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buf = kmem_alloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
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if (!buf)
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return -ENOMEM;
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error = xfs_iget(mp, NULL, ino,
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(XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
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XFS_ILOCK_SHARED, &ip);
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if (error)
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goto out_free;
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ASSERT(ip != NULL);
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ASSERT(ip->i_imap.im_blkno != 0);
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dic = &ip->i_d;
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/* xfs_iget returns the following without needing
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* further change.
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*/
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buf->bs_nlink = dic->di_nlink;
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buf->bs_projid_lo = dic->di_projid_lo;
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buf->bs_projid_hi = dic->di_projid_hi;
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buf->bs_ino = ino;
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buf->bs_mode = dic->di_mode;
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buf->bs_uid = dic->di_uid;
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buf->bs_gid = dic->di_gid;
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buf->bs_size = dic->di_size;
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buf->bs_atime.tv_sec = dic->di_atime.t_sec;
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buf->bs_atime.tv_nsec = dic->di_atime.t_nsec;
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buf->bs_mtime.tv_sec = dic->di_mtime.t_sec;
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buf->bs_mtime.tv_nsec = dic->di_mtime.t_nsec;
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buf->bs_ctime.tv_sec = dic->di_ctime.t_sec;
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buf->bs_ctime.tv_nsec = dic->di_ctime.t_nsec;
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buf->bs_xflags = xfs_ip2xflags(ip);
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buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
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buf->bs_extents = dic->di_nextents;
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buf->bs_gen = dic->di_gen;
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memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
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buf->bs_dmevmask = dic->di_dmevmask;
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buf->bs_dmstate = dic->di_dmstate;
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buf->bs_aextents = dic->di_anextents;
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buf->bs_forkoff = XFS_IFORK_BOFF(ip);
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switch (dic->di_format) {
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case XFS_DINODE_FMT_DEV:
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buf->bs_rdev = ip->i_df.if_u2.if_rdev;
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buf->bs_blksize = BLKDEV_IOSIZE;
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buf->bs_blocks = 0;
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break;
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case XFS_DINODE_FMT_LOCAL:
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case XFS_DINODE_FMT_UUID:
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buf->bs_rdev = 0;
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buf->bs_blksize = mp->m_sb.sb_blocksize;
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buf->bs_blocks = 0;
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break;
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case XFS_DINODE_FMT_EXTENTS:
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case XFS_DINODE_FMT_BTREE:
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buf->bs_rdev = 0;
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buf->bs_blksize = mp->m_sb.sb_blocksize;
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buf->bs_blocks = dic->di_nblocks + ip->i_delayed_blks;
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break;
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}
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xfs_iunlock(ip, XFS_ILOCK_SHARED);
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IRELE(ip);
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error = formatter(buffer, ubsize, ubused, buf);
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if (!error)
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*stat = BULKSTAT_RV_DIDONE;
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out_free:
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kmem_free(buf);
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return error;
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}
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/* Return 0 on success or positive error */
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STATIC int
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xfs_bulkstat_one_fmt(
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void __user *ubuffer,
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int ubsize,
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int *ubused,
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const xfs_bstat_t *buffer)
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{
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if (ubsize < sizeof(*buffer))
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return -ENOMEM;
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if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
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return -EFAULT;
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if (ubused)
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*ubused = sizeof(*buffer);
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return 0;
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}
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int
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xfs_bulkstat_one(
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xfs_mount_t *mp, /* mount point for filesystem */
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xfs_ino_t ino, /* inode number to get data for */
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void __user *buffer, /* buffer to place output in */
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int ubsize, /* size of buffer */
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int *ubused, /* bytes used by me */
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int *stat) /* BULKSTAT_RV_... */
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{
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return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
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xfs_bulkstat_one_fmt, ubused, stat);
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}
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/*
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* Loop over all clusters in a chunk for a given incore inode allocation btree
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* record. Do a readahead if there are any allocated inodes in that cluster.
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*/
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STATIC void
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xfs_bulkstat_ichunk_ra(
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struct xfs_mount *mp,
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xfs_agnumber_t agno,
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struct xfs_inobt_rec_incore *irec)
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{
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xfs_agblock_t agbno;
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struct blk_plug plug;
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int blks_per_cluster;
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int inodes_per_cluster;
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int i; /* inode chunk index */
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agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
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blks_per_cluster = xfs_icluster_size_fsb(mp);
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inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
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blk_start_plug(&plug);
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for (i = 0; i < XFS_INODES_PER_CHUNK;
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i += inodes_per_cluster, agbno += blks_per_cluster) {
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if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
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xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
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&xfs_inode_buf_ops);
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}
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}
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blk_finish_plug(&plug);
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}
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/*
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* Lookup the inode chunk that the given inode lives in and then get the record
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* if we found the chunk. If the inode was not the last in the chunk and there
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* are some left allocated, update the data for the pointed-to record as well as
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* return the count of grabbed inodes.
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*/
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STATIC int
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xfs_bulkstat_grab_ichunk(
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struct xfs_btree_cur *cur, /* btree cursor */
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xfs_agino_t agino, /* starting inode of chunk */
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int *icount,/* return # of inodes grabbed */
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struct xfs_inobt_rec_incore *irec) /* btree record */
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{
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int idx; /* index into inode chunk */
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int stat;
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int error = 0;
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/* Lookup the inode chunk that this inode lives in */
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error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
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if (error)
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return error;
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if (!stat) {
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*icount = 0;
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return error;
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}
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/* Get the record, should always work */
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error = xfs_inobt_get_rec(cur, irec, &stat);
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if (error)
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return error;
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XFS_WANT_CORRUPTED_RETURN(stat == 1);
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/* Check if the record contains the inode in request */
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if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino)
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return -EINVAL;
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idx = agino - irec->ir_startino + 1;
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if (idx < XFS_INODES_PER_CHUNK &&
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(xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
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int i;
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/* We got a right chunk with some left inodes allocated at it.
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* Grab the chunk record. Mark all the uninteresting inodes
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* free -- because they're before our start point.
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*/
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for (i = 0; i < idx; i++) {
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if (XFS_INOBT_MASK(i) & ~irec->ir_free)
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irec->ir_freecount++;
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}
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irec->ir_free |= xfs_inobt_maskn(0, idx);
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*icount = XFS_INODES_PER_CHUNK - irec->ir_freecount;
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}
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return 0;
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}
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#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
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/*
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* Process inodes in chunk with a pointer to a formatter function
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* that will iget the inode and fill in the appropriate structure.
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*/
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int
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xfs_bulkstat_ag_ichunk(
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struct xfs_mount *mp,
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xfs_agnumber_t agno,
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struct xfs_inobt_rec_incore *irbp,
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bulkstat_one_pf formatter,
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size_t statstruct_size,
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struct xfs_bulkstat_agichunk *acp)
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{
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xfs_ino_t lastino = acp->ac_lastino;
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char __user **ubufp = acp->ac_ubuffer;
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int ubleft = acp->ac_ubleft;
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int ubelem = acp->ac_ubelem;
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int chunkidx, clustidx;
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int error = 0;
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xfs_agino_t agino;
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for (agino = irbp->ir_startino, chunkidx = clustidx = 0;
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XFS_BULKSTAT_UBLEFT(ubleft) &&
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irbp->ir_freecount < XFS_INODES_PER_CHUNK;
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chunkidx++, clustidx++, agino++) {
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int fmterror; /* bulkstat formatter result */
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int ubused;
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xfs_ino_t ino = XFS_AGINO_TO_INO(mp, agno, agino);
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ASSERT(chunkidx < XFS_INODES_PER_CHUNK);
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/* Skip if this inode is free */
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if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free) {
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lastino = ino;
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continue;
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}
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/*
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* Count used inodes as free so we can tell when the
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* chunk is used up.
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*/
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irbp->ir_freecount++;
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/* Get the inode and fill in a single buffer */
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ubused = statstruct_size;
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error = formatter(mp, ino, *ubufp, ubleft, &ubused, &fmterror);
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if (fmterror == BULKSTAT_RV_NOTHING) {
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if (error && error != -ENOENT && error != -EINVAL) {
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ubleft = 0;
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break;
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}
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lastino = ino;
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continue;
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}
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if (fmterror == BULKSTAT_RV_GIVEUP) {
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ubleft = 0;
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ASSERT(error);
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break;
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}
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if (*ubufp)
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*ubufp += ubused;
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ubleft -= ubused;
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ubelem++;
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lastino = ino;
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}
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acp->ac_lastino = lastino;
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acp->ac_ubleft = ubleft;
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acp->ac_ubelem = ubelem;
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return error;
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}
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/*
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* Return stat information in bulk (by-inode) for the filesystem.
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*/
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int /* error status */
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xfs_bulkstat(
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xfs_mount_t *mp, /* mount point for filesystem */
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xfs_ino_t *lastinop, /* last inode returned */
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int *ubcountp, /* size of buffer/count returned */
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bulkstat_one_pf formatter, /* func that'd fill a single buf */
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size_t statstruct_size, /* sizeof struct filling */
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char __user *ubuffer, /* buffer with inode stats */
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int *done) /* 1 if there are more stats to get */
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{
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xfs_buf_t *agbp; /* agi header buffer */
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xfs_agi_t *agi; /* agi header data */
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xfs_agino_t agino; /* inode # in allocation group */
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xfs_agnumber_t agno; /* allocation group number */
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xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
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int end_of_ag; /* set if we've seen the ag end */
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int error; /* error code */
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int fmterror;/* bulkstat formatter result */
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int i; /* loop index */
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int icount; /* count of inodes good in irbuf */
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size_t irbsize; /* size of irec buffer in bytes */
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xfs_ino_t ino; /* inode number (filesystem) */
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xfs_inobt_rec_incore_t *irbp; /* current irec buffer pointer */
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xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
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xfs_inobt_rec_incore_t *irbufend; /* end of good irec buffer entries */
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xfs_ino_t lastino; /* last inode number returned */
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int nirbuf; /* size of irbuf */
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int rval; /* return value error code */
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int tmp; /* result value from btree calls */
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int ubcount; /* size of user's buffer */
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int ubleft; /* bytes left in user's buffer */
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char __user *ubufp; /* pointer into user's buffer */
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int ubelem; /* spaces used in user's buffer */
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/*
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* Get the last inode value, see if there's nothing to do.
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*/
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ino = (xfs_ino_t)*lastinop;
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lastino = ino;
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agno = XFS_INO_TO_AGNO(mp, ino);
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agino = XFS_INO_TO_AGINO(mp, ino);
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if (agno >= mp->m_sb.sb_agcount ||
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ino != XFS_AGINO_TO_INO(mp, agno, agino)) {
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*done = 1;
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*ubcountp = 0;
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return 0;
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}
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ubcount = *ubcountp; /* statstruct's */
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ubleft = ubcount * statstruct_size; /* bytes */
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*ubcountp = ubelem = 0;
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*done = 0;
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fmterror = 0;
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ubufp = ubuffer;
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irbuf = kmem_zalloc_greedy(&irbsize, PAGE_SIZE, PAGE_SIZE * 4);
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if (!irbuf)
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return -ENOMEM;
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nirbuf = irbsize / sizeof(*irbuf);
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/*
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* Loop over the allocation groups, starting from the last
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* inode returned; 0 means start of the allocation group.
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*/
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rval = 0;
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while (XFS_BULKSTAT_UBLEFT(ubleft) && agno < mp->m_sb.sb_agcount) {
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cond_resched();
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error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
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if (error)
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break;
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agi = XFS_BUF_TO_AGI(agbp);
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/*
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* Allocate and initialize a btree cursor for ialloc btree.
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*/
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cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
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XFS_BTNUM_INO);
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irbp = irbuf;
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irbufend = irbuf + nirbuf;
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end_of_ag = 0;
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icount = 0;
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if (agino > 0) {
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/*
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* In the middle of an allocation group, we need to get
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* the remainder of the chunk we're in.
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*/
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struct xfs_inobt_rec_incore r;
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error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
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if (error)
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break;
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if (icount) {
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irbp->ir_startino = r.ir_startino;
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irbp->ir_freecount = r.ir_freecount;
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irbp->ir_free = r.ir_free;
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irbp++;
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agino = r.ir_startino + XFS_INODES_PER_CHUNK;
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}
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/* Increment to the next record */
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error = xfs_btree_increment(cur, 0, &tmp);
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} else {
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/* Start of ag. Lookup the first inode chunk */
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error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &tmp);
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}
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if (error)
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break;
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/*
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* Loop through inode btree records in this ag,
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* until we run out of inodes or space in the buffer.
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*/
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while (irbp < irbufend && icount < ubcount) {
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struct xfs_inobt_rec_incore r;
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error = xfs_inobt_get_rec(cur, &r, &i);
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if (error || i == 0) {
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end_of_ag = 1;
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break;
|
|
}
|
|
|
|
/*
|
|
* If this chunk has any allocated inodes, save it.
|
|
* Also start read-ahead now for this chunk.
|
|
*/
|
|
if (r.ir_freecount < XFS_INODES_PER_CHUNK) {
|
|
xfs_bulkstat_ichunk_ra(mp, agno, &r);
|
|
irbp->ir_startino = r.ir_startino;
|
|
irbp->ir_freecount = r.ir_freecount;
|
|
irbp->ir_free = r.ir_free;
|
|
irbp++;
|
|
icount += XFS_INODES_PER_CHUNK - r.ir_freecount;
|
|
}
|
|
/*
|
|
* Set agino to after this chunk and bump the cursor.
|
|
*/
|
|
agino = r.ir_startino + XFS_INODES_PER_CHUNK;
|
|
error = xfs_btree_increment(cur, 0, &tmp);
|
|
cond_resched();
|
|
}
|
|
/*
|
|
* Drop the btree buffers and the agi buffer.
|
|
* We can't hold any of the locks these represent
|
|
* when calling iget.
|
|
*/
|
|
xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
|
|
xfs_buf_relse(agbp);
|
|
/*
|
|
* Now format all the good inodes into the user's buffer.
|
|
*/
|
|
irbufend = irbp;
|
|
for (irbp = irbuf;
|
|
irbp < irbufend && XFS_BULKSTAT_UBLEFT(ubleft); irbp++) {
|
|
struct xfs_bulkstat_agichunk ac;
|
|
|
|
ac.ac_lastino = lastino;
|
|
ac.ac_ubuffer = &ubuffer;
|
|
ac.ac_ubleft = ubleft;
|
|
ac.ac_ubelem = ubelem;
|
|
error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
|
|
formatter, statstruct_size, &ac);
|
|
if (error)
|
|
rval = error;
|
|
|
|
lastino = ac.ac_lastino;
|
|
ubleft = ac.ac_ubleft;
|
|
ubelem = ac.ac_ubelem;
|
|
|
|
cond_resched();
|
|
}
|
|
/*
|
|
* Set up for the next loop iteration.
|
|
*/
|
|
if (XFS_BULKSTAT_UBLEFT(ubleft)) {
|
|
if (end_of_ag) {
|
|
agno++;
|
|
agino = 0;
|
|
} else
|
|
agino = XFS_INO_TO_AGINO(mp, lastino);
|
|
} else
|
|
break;
|
|
}
|
|
/*
|
|
* Done, we're either out of filesystem or space to put the data.
|
|
*/
|
|
kmem_free(irbuf);
|
|
*ubcountp = ubelem;
|
|
/*
|
|
* Found some inodes, return them now and return the error next time.
|
|
*/
|
|
if (ubelem)
|
|
rval = 0;
|
|
if (agno >= mp->m_sb.sb_agcount) {
|
|
/*
|
|
* If we ran out of filesystem, mark lastino as off
|
|
* the end of the filesystem, so the next call
|
|
* will return immediately.
|
|
*/
|
|
*lastinop = (xfs_ino_t)XFS_AGINO_TO_INO(mp, agno, 0);
|
|
*done = 1;
|
|
} else
|
|
*lastinop = (xfs_ino_t)lastino;
|
|
|
|
return rval;
|
|
}
|
|
|
|
int
|
|
xfs_inumbers_fmt(
|
|
void __user *ubuffer, /* buffer to write to */
|
|
const struct xfs_inogrp *buffer, /* buffer to read from */
|
|
long count, /* # of elements to read */
|
|
long *written) /* # of bytes written */
|
|
{
|
|
if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
|
|
return -EFAULT;
|
|
*written = count * sizeof(*buffer);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Return inode number table for the filesystem.
|
|
*/
|
|
int /* error status */
|
|
xfs_inumbers(
|
|
struct xfs_mount *mp,/* mount point for filesystem */
|
|
xfs_ino_t *lastino,/* last inode returned */
|
|
int *count,/* size of buffer/count returned */
|
|
void __user *ubuffer,/* buffer with inode descriptions */
|
|
inumbers_fmt_pf formatter)
|
|
{
|
|
xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, *lastino);
|
|
xfs_agino_t agino = XFS_INO_TO_AGINO(mp, *lastino);
|
|
struct xfs_btree_cur *cur = NULL;
|
|
struct xfs_buf *agbp = NULL;
|
|
struct xfs_inogrp *buffer;
|
|
int bcount;
|
|
int left = *count;
|
|
int bufidx = 0;
|
|
int error = 0;
|
|
|
|
*count = 0;
|
|
if (agno >= mp->m_sb.sb_agcount ||
|
|
*lastino != XFS_AGINO_TO_INO(mp, agno, agino))
|
|
return error;
|
|
|
|
bcount = MIN(left, (int)(PAGE_SIZE / sizeof(*buffer)));
|
|
buffer = kmem_alloc(bcount * sizeof(*buffer), KM_SLEEP);
|
|
do {
|
|
struct xfs_inobt_rec_incore r;
|
|
int stat;
|
|
|
|
if (!agbp) {
|
|
error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
|
|
if (error)
|
|
break;
|
|
|
|
cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
|
|
XFS_BTNUM_INO);
|
|
error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
|
|
&stat);
|
|
if (error)
|
|
break;
|
|
if (!stat)
|
|
goto next_ag;
|
|
}
|
|
|
|
error = xfs_inobt_get_rec(cur, &r, &stat);
|
|
if (error)
|
|
break;
|
|
if (!stat)
|
|
goto next_ag;
|
|
|
|
agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
|
|
buffer[bufidx].xi_startino =
|
|
XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
|
|
buffer[bufidx].xi_alloccount =
|
|
XFS_INODES_PER_CHUNK - r.ir_freecount;
|
|
buffer[bufidx].xi_allocmask = ~r.ir_free;
|
|
if (++bufidx == bcount) {
|
|
long written;
|
|
|
|
error = formatter(ubuffer, buffer, bufidx, &written);
|
|
if (error)
|
|
break;
|
|
ubuffer += written;
|
|
*count += bufidx;
|
|
bufidx = 0;
|
|
}
|
|
if (!--left)
|
|
break;
|
|
|
|
error = xfs_btree_increment(cur, 0, &stat);
|
|
if (error)
|
|
break;
|
|
if (stat)
|
|
continue;
|
|
|
|
next_ag:
|
|
xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
|
|
cur = NULL;
|
|
xfs_buf_relse(agbp);
|
|
agbp = NULL;
|
|
agino = 0;
|
|
} while (++agno < mp->m_sb.sb_agcount);
|
|
|
|
if (!error) {
|
|
if (bufidx) {
|
|
long written;
|
|
|
|
error = formatter(ubuffer, buffer, bufidx, &written);
|
|
if (!error)
|
|
*count += bufidx;
|
|
}
|
|
*lastino = XFS_AGINO_TO_INO(mp, agno, agino);
|
|
}
|
|
|
|
kmem_free(buffer);
|
|
if (cur)
|
|
xfs_btree_del_cursor(cur, (error ? XFS_BTREE_ERROR :
|
|
XFS_BTREE_NOERROR));
|
|
if (agbp)
|
|
xfs_buf_relse(agbp);
|
|
|
|
return error;
|
|
}
|