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409 lines
11 KiB
409 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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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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#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_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_iwalk.h" |
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#include "xfs_itable.h" |
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#include "xfs_error.h" |
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#include "xfs_icache.h" |
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#include "xfs_health.h" |
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|
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/* |
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* Bulk Stat |
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* ========= |
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* |
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* Use the inode walking functions to fill out struct xfs_bulkstat for every |
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* allocated inode, then pass the stat information to some externally provided |
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* iteration function. |
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*/ |
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struct xfs_bstat_chunk { |
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bulkstat_one_fmt_pf formatter; |
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struct xfs_ibulk *breq; |
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struct xfs_bulkstat *buf; |
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}; |
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|
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/* |
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* Fill out the bulkstat info for a single inode and report it somewhere. |
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* |
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* bc->breq->lastino is effectively the inode cursor as we walk through the |
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* filesystem. Therefore, we update it any time we need to move the cursor |
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* forward, regardless of whether or not we're sending any bstat information |
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* back to userspace. If the inode is internal metadata or, has been freed |
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* out from under us, we just simply keep going. |
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* |
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* However, if any other type of error happens we want to stop right where we |
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* are so that userspace will call back with exact number of the bad inode and |
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* we can send back an error code. |
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* |
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* Note that if the formatter tells us there's no space left in the buffer we |
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* move the cursor forward and abort the walk. |
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*/ |
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STATIC int |
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xfs_bulkstat_one_int( |
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struct xfs_mount *mp, |
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struct user_namespace *mnt_userns, |
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struct xfs_trans *tp, |
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xfs_ino_t ino, |
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struct xfs_bstat_chunk *bc) |
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{ |
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struct user_namespace *sb_userns = mp->m_super->s_user_ns; |
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struct xfs_inode *ip; /* incore inode pointer */ |
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struct inode *inode; |
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struct xfs_bulkstat *buf = bc->buf; |
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int error = -EINVAL; |
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if (xfs_internal_inum(mp, ino)) |
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goto out_advance; |
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error = xfs_iget(mp, tp, 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 == -ENOENT || error == -EINVAL) |
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goto out_advance; |
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if (error) |
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goto out; |
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ASSERT(ip != NULL); |
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ASSERT(ip->i_imap.im_blkno != 0); |
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inode = VFS_I(ip); |
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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_projectid = ip->i_projid; |
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buf->bs_ino = ino; |
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buf->bs_uid = from_kuid(sb_userns, i_uid_into_mnt(mnt_userns, inode)); |
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buf->bs_gid = from_kgid(sb_userns, i_gid_into_mnt(mnt_userns, inode)); |
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buf->bs_size = ip->i_disk_size; |
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buf->bs_nlink = inode->i_nlink; |
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buf->bs_atime = inode->i_atime.tv_sec; |
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buf->bs_atime_nsec = inode->i_atime.tv_nsec; |
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buf->bs_mtime = inode->i_mtime.tv_sec; |
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buf->bs_mtime_nsec = inode->i_mtime.tv_nsec; |
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buf->bs_ctime = inode->i_ctime.tv_sec; |
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buf->bs_ctime_nsec = inode->i_ctime.tv_nsec; |
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buf->bs_gen = inode->i_generation; |
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buf->bs_mode = inode->i_mode; |
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buf->bs_xflags = xfs_ip2xflags(ip); |
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buf->bs_extsize_blks = ip->i_extsize; |
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buf->bs_extents = xfs_ifork_nextents(&ip->i_df); |
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xfs_bulkstat_health(ip, buf); |
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buf->bs_aextents = xfs_ifork_nextents(ip->i_afp); |
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buf->bs_forkoff = XFS_IFORK_BOFF(ip); |
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buf->bs_version = XFS_BULKSTAT_VERSION_V5; |
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if (xfs_sb_version_has_v3inode(&mp->m_sb)) { |
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buf->bs_btime = ip->i_crtime.tv_sec; |
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buf->bs_btime_nsec = ip->i_crtime.tv_nsec; |
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if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE) |
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buf->bs_cowextsize_blks = ip->i_cowextsize; |
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} |
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switch (ip->i_df.if_format) { |
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case XFS_DINODE_FMT_DEV: |
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buf->bs_rdev = sysv_encode_dev(inode->i_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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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 = ip->i_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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xfs_irele(ip); |
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error = bc->formatter(bc->breq, buf); |
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if (error == -ECANCELED) |
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goto out_advance; |
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if (error) |
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goto out; |
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out_advance: |
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/* |
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* Advance the cursor to the inode that comes after the one we just |
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* looked at. We want the caller to move along if the bulkstat |
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* information was copied successfully; if we tried to grab the inode |
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* but it's no longer allocated; or if it's internal metadata. |
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*/ |
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bc->breq->startino = ino + 1; |
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out: |
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return error; |
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} |
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/* Bulkstat a single inode. */ |
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int |
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xfs_bulkstat_one( |
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struct xfs_ibulk *breq, |
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bulkstat_one_fmt_pf formatter) |
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{ |
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struct xfs_bstat_chunk bc = { |
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.formatter = formatter, |
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.breq = breq, |
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}; |
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int error; |
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if (breq->mnt_userns != &init_user_ns) { |
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xfs_warn_ratelimited(breq->mp, |
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"bulkstat not supported inside of idmapped mounts."); |
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return -EINVAL; |
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} |
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ASSERT(breq->icount == 1); |
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bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat), |
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KM_MAYFAIL); |
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if (!bc.buf) |
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return -ENOMEM; |
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error = xfs_bulkstat_one_int(breq->mp, breq->mnt_userns, NULL, |
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breq->startino, &bc); |
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kmem_free(bc.buf); |
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/* |
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* If we reported one inode to userspace then we abort because we hit |
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* the end of the buffer. Don't leak that back to userspace. |
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*/ |
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if (error == -ECANCELED) |
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error = 0; |
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return error; |
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} |
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static int |
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xfs_bulkstat_iwalk( |
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struct xfs_mount *mp, |
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struct xfs_trans *tp, |
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xfs_ino_t ino, |
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void *data) |
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{ |
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struct xfs_bstat_chunk *bc = data; |
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int error; |
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error = xfs_bulkstat_one_int(mp, bc->breq->mnt_userns, tp, ino, data); |
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/* bulkstat just skips over missing inodes */ |
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if (error == -ENOENT || error == -EINVAL) |
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return 0; |
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return error; |
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} |
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/* |
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* Check the incoming lastino parameter. |
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* |
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* We allow any inode value that could map to physical space inside the |
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* filesystem because if there are no inodes there, bulkstat moves on to the |
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* next chunk. In other words, the magic agino value of zero takes us to the |
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* first chunk in the AG, and an agino value past the end of the AG takes us to |
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* the first chunk in the next AG. |
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* |
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* Therefore we can end early if the requested inode is beyond the end of the |
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* filesystem or doesn't map properly. |
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*/ |
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static inline bool |
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xfs_bulkstat_already_done( |
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struct xfs_mount *mp, |
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xfs_ino_t startino) |
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{ |
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xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino); |
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xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino); |
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return agno >= mp->m_sb.sb_agcount || |
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startino != XFS_AGINO_TO_INO(mp, agno, agino); |
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} |
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/* Return stat information in bulk (by-inode) for the filesystem. */ |
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int |
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xfs_bulkstat( |
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struct xfs_ibulk *breq, |
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bulkstat_one_fmt_pf formatter) |
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{ |
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struct xfs_bstat_chunk bc = { |
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.formatter = formatter, |
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.breq = breq, |
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}; |
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int error; |
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if (breq->mnt_userns != &init_user_ns) { |
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xfs_warn_ratelimited(breq->mp, |
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"bulkstat not supported inside of idmapped mounts."); |
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return -EINVAL; |
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} |
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if (xfs_bulkstat_already_done(breq->mp, breq->startino)) |
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return 0; |
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bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat), |
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KM_MAYFAIL); |
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if (!bc.buf) |
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return -ENOMEM; |
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error = xfs_iwalk(breq->mp, NULL, breq->startino, breq->flags, |
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xfs_bulkstat_iwalk, breq->icount, &bc); |
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kmem_free(bc.buf); |
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/* |
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* We found some inodes, so clear the error status and return them. |
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* The lastino pointer will point directly at the inode that triggered |
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* any error that occurred, so on the next call the error will be |
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* triggered again and propagated to userspace as there will be no |
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* formatted inodes in the buffer. |
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*/ |
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if (breq->ocount > 0) |
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error = 0; |
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return error; |
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} |
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/* Convert bulkstat (v5) to bstat (v1). */ |
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void |
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xfs_bulkstat_to_bstat( |
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struct xfs_mount *mp, |
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struct xfs_bstat *bs1, |
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const struct xfs_bulkstat *bstat) |
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{ |
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/* memset is needed here because of padding holes in the structure. */ |
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memset(bs1, 0, sizeof(struct xfs_bstat)); |
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bs1->bs_ino = bstat->bs_ino; |
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bs1->bs_mode = bstat->bs_mode; |
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bs1->bs_nlink = bstat->bs_nlink; |
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bs1->bs_uid = bstat->bs_uid; |
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bs1->bs_gid = bstat->bs_gid; |
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bs1->bs_rdev = bstat->bs_rdev; |
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bs1->bs_blksize = bstat->bs_blksize; |
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bs1->bs_size = bstat->bs_size; |
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bs1->bs_atime.tv_sec = bstat->bs_atime; |
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bs1->bs_mtime.tv_sec = bstat->bs_mtime; |
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bs1->bs_ctime.tv_sec = bstat->bs_ctime; |
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bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec; |
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bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec; |
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bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec; |
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bs1->bs_blocks = bstat->bs_blocks; |
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bs1->bs_xflags = bstat->bs_xflags; |
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bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks); |
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bs1->bs_extents = bstat->bs_extents; |
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bs1->bs_gen = bstat->bs_gen; |
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bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF; |
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bs1->bs_forkoff = bstat->bs_forkoff; |
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bs1->bs_projid_hi = bstat->bs_projectid >> 16; |
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bs1->bs_sick = bstat->bs_sick; |
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bs1->bs_checked = bstat->bs_checked; |
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bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks); |
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bs1->bs_dmevmask = 0; |
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bs1->bs_dmstate = 0; |
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bs1->bs_aextents = bstat->bs_aextents; |
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} |
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struct xfs_inumbers_chunk { |
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inumbers_fmt_pf formatter; |
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struct xfs_ibulk *breq; |
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}; |
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/* |
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* INUMBERS |
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* ======== |
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* This is how we export inode btree records to userspace, so that XFS tools |
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* can figure out where inodes are allocated. |
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*/ |
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/* |
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* Format the inode group structure and report it somewhere. |
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* |
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* Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk |
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* through the filesystem so we move it forward unless there was a runtime |
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* error. If the formatter tells us the buffer is now full we also move the |
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* cursor forward and abort the walk. |
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*/ |
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STATIC int |
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xfs_inumbers_walk( |
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struct xfs_mount *mp, |
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struct xfs_trans *tp, |
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xfs_agnumber_t agno, |
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const struct xfs_inobt_rec_incore *irec, |
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void *data) |
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{ |
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struct xfs_inumbers inogrp = { |
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.xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino), |
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.xi_alloccount = irec->ir_count - irec->ir_freecount, |
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.xi_allocmask = ~irec->ir_free, |
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.xi_version = XFS_INUMBERS_VERSION_V5, |
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}; |
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struct xfs_inumbers_chunk *ic = data; |
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int error; |
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error = ic->formatter(ic->breq, &inogrp); |
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if (error && error != -ECANCELED) |
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return error; |
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ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) + |
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XFS_INODES_PER_CHUNK; |
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return error; |
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} |
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/* |
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* Return inode number table for the filesystem. |
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*/ |
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int |
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xfs_inumbers( |
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struct xfs_ibulk *breq, |
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inumbers_fmt_pf formatter) |
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{ |
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struct xfs_inumbers_chunk ic = { |
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.formatter = formatter, |
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.breq = breq, |
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}; |
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int error = 0; |
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if (xfs_bulkstat_already_done(breq->mp, breq->startino)) |
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return 0; |
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error = xfs_inobt_walk(breq->mp, NULL, breq->startino, breq->flags, |
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xfs_inumbers_walk, breq->icount, &ic); |
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/* |
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* We found some inode groups, so clear the error status and return |
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* them. The lastino pointer will point directly at the inode that |
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* triggered any error that occurred, so on the next call the error |
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* will be triggered again and propagated to userspace as there will be |
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* no formatted inode groups in the buffer. |
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*/ |
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if (breq->ocount > 0) |
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error = 0; |
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return error; |
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} |
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/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */ |
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void |
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xfs_inumbers_to_inogrp( |
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struct xfs_inogrp *ig1, |
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const struct xfs_inumbers *ig) |
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{ |
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/* memset is needed here because of padding holes in the structure. */ |
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memset(ig1, 0, sizeof(struct xfs_inogrp)); |
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ig1->xi_startino = ig->xi_startino; |
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ig1->xi_alloccount = ig->xi_alloccount; |
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ig1->xi_allocmask = ig->xi_allocmask; |
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}
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