[linux-2.6-block.git] / fs / xfs / xfs_itable.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
 * All Rights Reserved.
 */
#include "xfs.h"
#include "xfs_fs.h"
#include "xfs_shared.h"
#include "xfs_format.h"
#include "xfs_log_format.h"
#include "xfs_trans_resv.h"
#include "xfs_mount.h"
#include "xfs_inode.h"
#include "xfs_btree.h"
#include "xfs_ialloc.h"
#include "xfs_ialloc_btree.h"
#include "xfs_iwalk.h"
#include "xfs_itable.h"
#include "xfs_error.h"
#include "xfs_icache.h"
#include "xfs_health.h"

/*
 * Bulk Stat
 * =========
 *
 * Use the inode walking functions to fill out struct xfs_bulkstat for every
 * allocated inode, then pass the stat information to some externally provided
 * iteration function.
 */

struct xfs_bstat_chunk {
	bulkstat_one_fmt_pf	formatter;
	struct xfs_ibulk	*breq;
	struct xfs_bulkstat	*buf;
};

/*
 * Fill out the bulkstat info for a single inode and report it somewhere.
 *
 * bc->breq->lastino is effectively the inode cursor as we walk through the
 * filesystem.  Therefore, we update it any time we need to move the cursor
 * forward, regardless of whether or not we're sending any bstat information
 * back to userspace.  If the inode is internal metadata or, has been freed
 * out from under us, we just simply keep going.
 *
 * However, if any other type of error happens we want to stop right where we
 * are so that userspace will call back with exact number of the bad inode and
 * we can send back an error code.
 *
 * Note that if the formatter tells us there's no space left in the buffer we
 * move the cursor forward and abort the walk.
 */
STATIC int
xfs_bulkstat_one_int(
	struct xfs_mount	*mp,
	struct user_namespace	*mnt_userns,
	struct xfs_trans	*tp,
	xfs_ino_t		ino,
	struct xfs_bstat_chunk	*bc)
{
	struct user_namespace	*sb_userns = mp->m_super->s_user_ns;
	struct xfs_icdinode	*dic;		/* dinode core info pointer */
	struct xfs_inode	*ip;		/* incore inode pointer */
	struct inode		*inode;
	struct xfs_bulkstat	*buf = bc->buf;
	int			error = -EINVAL;

	if (xfs_internal_inum(mp, ino))
		goto out_advance;

	error = xfs_iget(mp, tp, ino,
			 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
			 XFS_ILOCK_SHARED, &ip);
	if (error == -ENOENT || error == -EINVAL)
		goto out_advance;
	if (error)
		goto out;

	ASSERT(ip != NULL);
	ASSERT(ip->i_imap.im_blkno != 0);
	inode = VFS_I(ip);

	dic = &ip->i_d;

	/* xfs_iget returns the following without needing
	 * further change.
	 */
	buf->bs_projectid = ip->i_projid;
	buf->bs_ino = ino;
	buf->bs_uid = from_kuid(sb_userns, i_uid_into_mnt(mnt_userns, inode));
	buf->bs_gid = from_kgid(sb_userns, i_gid_into_mnt(mnt_userns, inode));
	buf->bs_size = ip->i_disk_size;

	buf->bs_nlink = inode->i_nlink;
	buf->bs_atime = inode->i_atime.tv_sec;
	buf->bs_atime_nsec = inode->i_atime.tv_nsec;
	buf->bs_mtime = inode->i_mtime.tv_sec;
	buf->bs_mtime_nsec = inode->i_mtime.tv_nsec;
	buf->bs_ctime = inode->i_ctime.tv_sec;
	buf->bs_ctime_nsec = inode->i_ctime.tv_nsec;
	buf->bs_gen = inode->i_generation;
	buf->bs_mode = inode->i_mode;

	buf->bs_xflags = xfs_ip2xflags(ip);
	buf->bs_extsize_blks = dic->di_extsize;
	buf->bs_extents = xfs_ifork_nextents(&ip->i_df);
	xfs_bulkstat_health(ip, buf);
	buf->bs_aextents = xfs_ifork_nextents(ip->i_afp);
	buf->bs_forkoff = XFS_IFORK_BOFF(ip);
	buf->bs_version = XFS_BULKSTAT_VERSION_V5;

	if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
		buf->bs_btime = dic->di_crtime.tv_sec;
		buf->bs_btime_nsec = dic->di_crtime.tv_nsec;
		if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
			buf->bs_cowextsize_blks = dic->di_cowextsize;
	}

	switch (ip->i_df.if_format) {
	case XFS_DINODE_FMT_DEV:
		buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
		buf->bs_blksize = BLKDEV_IOSIZE;
		buf->bs_blocks = 0;
		break;
	case XFS_DINODE_FMT_LOCAL:
		buf->bs_rdev = 0;
		buf->bs_blksize = mp->m_sb.sb_blocksize;
		buf->bs_blocks = 0;
		break;
	case XFS_DINODE_FMT_EXTENTS:
	case XFS_DINODE_FMT_BTREE:
		buf->bs_rdev = 0;
		buf->bs_blksize = mp->m_sb.sb_blocksize;
		buf->bs_blocks = ip->i_nblocks + ip->i_delayed_blks;
		break;
	}
	xfs_iunlock(ip, XFS_ILOCK_SHARED);
	xfs_irele(ip);

	error = bc->formatter(bc->breq, buf);
	if (error == -ECANCELED)
		goto out_advance;
	if (error)
		goto out;

out_advance:
	/*
	 * Advance the cursor to the inode that comes after the one we just
	 * looked at.  We want the caller to move along if the bulkstat
	 * information was copied successfully; if we tried to grab the inode
	 * but it's no longer allocated; or if it's internal metadata.
	 */
	bc->breq->startino = ino + 1;
out:
	return error;
}

/* Bulkstat a single inode. */
int
xfs_bulkstat_one(
	struct xfs_ibulk	*breq,
	bulkstat_one_fmt_pf	formatter)
{
	struct xfs_bstat_chunk	bc = {
		.formatter	= formatter,
		.breq		= breq,
	};
	int			error;

	if (breq->mnt_userns != &init_user_ns) {
		xfs_warn_ratelimited(breq->mp,
			"bulkstat not supported inside of idmapped mounts.");
		return -EINVAL;
	}

	ASSERT(breq->icount == 1);

	bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
			KM_MAYFAIL);
	if (!bc.buf)
		return -ENOMEM;

	error = xfs_bulkstat_one_int(breq->mp, breq->mnt_userns, NULL,
				     breq->startino, &bc);

	kmem_free(bc.buf);

	/*
	 * If we reported one inode to userspace then we abort because we hit
	 * the end of the buffer.  Don't leak that back to userspace.
	 */
	if (error == -ECANCELED)
		error = 0;

	return error;
}

static int
xfs_bulkstat_iwalk(
	struct xfs_mount	*mp,
	struct xfs_trans	*tp,
	xfs_ino_t		ino,
	void			*data)
{
	struct xfs_bstat_chunk	*bc = data;
	int			error;

	error = xfs_bulkstat_one_int(mp, bc->breq->mnt_userns, tp, ino, data);
	/* bulkstat just skips over missing inodes */
	if (error == -ENOENT || error == -EINVAL)
		return 0;
	return error;
}

/*
 * Check the incoming lastino parameter.
 *
 * We allow any inode value that could map to physical space inside the
 * filesystem because if there are no inodes there, bulkstat moves on to the
 * next chunk.  In other words, the magic agino value of zero takes us to the
 * first chunk in the AG, and an agino value past the end of the AG takes us to
 * the first chunk in the next AG.
 *
 * Therefore we can end early if the requested inode is beyond the end of the
 * filesystem or doesn't map properly.
 */
static inline bool
xfs_bulkstat_already_done(
	struct xfs_mount	*mp,
	xfs_ino_t		startino)
{
	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, startino);
	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, startino);

	return agno >= mp->m_sb.sb_agcount ||
	       startino != XFS_AGINO_TO_INO(mp, agno, agino);
}

/* Return stat information in bulk (by-inode) for the filesystem. */
int
xfs_bulkstat(
	struct xfs_ibulk	*breq,
	bulkstat_one_fmt_pf	formatter)
{
	struct xfs_bstat_chunk	bc = {
		.formatter	= formatter,
		.breq		= breq,
	};
	int			error;

	if (breq->mnt_userns != &init_user_ns) {
		xfs_warn_ratelimited(breq->mp,
			"bulkstat not supported inside of idmapped mounts.");
		return -EINVAL;
	}
	if (xfs_bulkstat_already_done(breq->mp, breq->startino))
		return 0;

	bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
			KM_MAYFAIL);
	if (!bc.buf)
		return -ENOMEM;

	error = xfs_iwalk(breq->mp, NULL, breq->startino, breq->flags,
			xfs_bulkstat_iwalk, breq->icount, &bc);

	kmem_free(bc.buf);

	/*
	 * We found some inodes, so clear the error status and return them.
	 * The lastino pointer will point directly at the inode that triggered
	 * any error that occurred, so on the next call the error will be
	 * triggered again and propagated to userspace as there will be no
	 * formatted inodes in the buffer.
	 */
	if (breq->ocount > 0)
		error = 0;

	return error;
}

/* Convert bulkstat (v5) to bstat (v1). */
void
xfs_bulkstat_to_bstat(
	struct xfs_mount		*mp,
	struct xfs_bstat		*bs1,
	const struct xfs_bulkstat	*bstat)
{
	/* memset is needed here because of padding holes in the structure. */
	memset(bs1, 0, sizeof(struct xfs_bstat));
	bs1->bs_ino = bstat->bs_ino;
	bs1->bs_mode = bstat->bs_mode;
	bs1->bs_nlink = bstat->bs_nlink;
	bs1->bs_uid = bstat->bs_uid;
	bs1->bs_gid = bstat->bs_gid;
	bs1->bs_rdev = bstat->bs_rdev;
	bs1->bs_blksize = bstat->bs_blksize;
	bs1->bs_size = bstat->bs_size;
	bs1->bs_atime.tv_sec = bstat->bs_atime;
	bs1->bs_mtime.tv_sec = bstat->bs_mtime;
	bs1->bs_ctime.tv_sec = bstat->bs_ctime;
	bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;
	bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;
	bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;
	bs1->bs_blocks = bstat->bs_blocks;
	bs1->bs_xflags = bstat->bs_xflags;
	bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);
	bs1->bs_extents = bstat->bs_extents;
	bs1->bs_gen = bstat->bs_gen;
	bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;
	bs1->bs_forkoff = bstat->bs_forkoff;
	bs1->bs_projid_hi = bstat->bs_projectid >> 16;
	bs1->bs_sick = bstat->bs_sick;
	bs1->bs_checked = bstat->bs_checked;
	bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);
	bs1->bs_dmevmask = 0;
	bs1->bs_dmstate = 0;
	bs1->bs_aextents = bstat->bs_aextents;
}

struct xfs_inumbers_chunk {
	inumbers_fmt_pf		formatter;
	struct xfs_ibulk	*breq;
};

/*
 * INUMBERS
 * ========
 * This is how we export inode btree records to userspace, so that XFS tools
 * can figure out where inodes are allocated.
 */

/*
 * Format the inode group structure and report it somewhere.
 *
 * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk
 * through the filesystem so we move it forward unless there was a runtime
 * error.  If the formatter tells us the buffer is now full we also move the
 * cursor forward and abort the walk.
 */
STATIC int
xfs_inumbers_walk(
	struct xfs_mount	*mp,
	struct xfs_trans	*tp,
	xfs_agnumber_t		agno,
	const struct xfs_inobt_rec_incore *irec,
	void			*data)
{
	struct xfs_inumbers	inogrp = {
		.xi_startino	= XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
		.xi_alloccount	= irec->ir_count - irec->ir_freecount,
		.xi_allocmask	= ~irec->ir_free,
		.xi_version	= XFS_INUMBERS_VERSION_V5,
	};
	struct xfs_inumbers_chunk *ic = data;
	int			error;

	error = ic->formatter(ic->breq, &inogrp);
	if (error && error != -ECANCELED)
		return error;

	ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +
			XFS_INODES_PER_CHUNK;
	return error;
}

/*
 * Return inode number table for the filesystem.
 */
int
xfs_inumbers(
	struct xfs_ibulk	*breq,
	inumbers_fmt_pf		formatter)
{
	struct xfs_inumbers_chunk ic = {
		.formatter	= formatter,
		.breq		= breq,
	};
	int			error = 0;

	if (xfs_bulkstat_already_done(breq->mp, breq->startino))
		return 0;

	error = xfs_inobt_walk(breq->mp, NULL, breq->startino, breq->flags,
			xfs_inumbers_walk, breq->icount, &ic);

	/*
	 * We found some inode groups, so clear the error status and return
	 * them.  The lastino pointer will point directly at the inode that
	 * triggered any error that occurred, so on the next call the error
	 * will be triggered again and propagated to userspace as there will be
	 * no formatted inode groups in the buffer.
	 */
	if (breq->ocount > 0)
		error = 0;

	return error;
}

/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
void
xfs_inumbers_to_inogrp(
	struct xfs_inogrp		*ig1,
	const struct xfs_inumbers	*ig)
{
	/* memset is needed here because of padding holes in the structure. */
	memset(ig1, 0, sizeof(struct xfs_inogrp));
	ig1->xi_startino = ig->xi_startino;
	ig1->xi_alloccount = ig->xi_alloccount;
	ig1->xi_allocmask = ig->xi_allocmask;
}
Commit	Line	Data
0b61f8a4	1	// SPDX-License-Identifier: GPL-2.0
1da177e4	2	/*
7b718769 NS	3	* Copyright (c) 2000-2002,2005 Silicon Graphics, Inc.
7b718769 NS	4	* All Rights Reserved.
1da177e4	5	*/
1da177e4	6	#include "xfs.h"
a844f451	7	#include "xfs_fs.h"
70a9883c	8	#include "xfs_shared.h"
a4fbe6ab	9	#include "xfs_format.h"
239880ef DC	10	#include "xfs_log_format.h"
239880ef DC	11	#include "xfs_trans_resv.h"
1da177e4	12	#include "xfs_mount.h"
1da177e4	13	#include "xfs_inode.h"
a4fbe6ab	14	#include "xfs_btree.h"
1da177e4	15	#include "xfs_ialloc.h"
a4fbe6ab	16	#include "xfs_ialloc_btree.h"
2810bd68	17	#include "xfs_iwalk.h"
1da177e4 LT	18	#include "xfs_itable.h"
1da177e4 LT	19	#include "xfs_error.h"
33479e05	20	#include "xfs_icache.h"
89d139d5	21	#include "xfs_health.h"
1da177e4	22
7dce11db	23	/*
2810bd68 DW	24	* Bulk Stat
	25	* =========
	26	*
7035f972	27	* Use the inode walking functions to fill out struct xfs_bulkstat for every
2810bd68 DW	28	* allocated inode, then pass the stat information to some externally provided
2810bd68 DW	29	* iteration function.
7dce11db	30	*/
2810bd68 DW	31
	32	struct xfs_bstat_chunk {
	33	bulkstat_one_fmt_pf formatter;
	34	struct xfs_ibulk *breq;
7035f972	35	struct xfs_bulkstat *buf;
2810bd68 DW	36	};
	37
	38	/*
	39	* Fill out the bulkstat info for a single inode and report it somewhere.
	40	*
	41	* bc->breq->lastino is effectively the inode cursor as we walk through the
	42	* filesystem. Therefore, we update it any time we need to move the cursor
	43	* forward, regardless of whether or not we're sending any bstat information
	44	* back to userspace. If the inode is internal metadata or, has been freed
	45	* out from under us, we just simply keep going.
	46	*
	47	* However, if any other type of error happens we want to stop right where we
	48	* are so that userspace will call back with exact number of the bad inode and
	49	* we can send back an error code.
	50	*
	51	* Note that if the formatter tells us there's no space left in the buffer we
	52	* move the cursor forward and abort the walk.
	53	*/
	54	STATIC int
7dce11db	55	xfs_bulkstat_one_int(
2810bd68	56	struct xfs_mount *mp,
f736d93d	57	struct user_namespace *mnt_userns,
2810bd68 DW	58	struct xfs_trans *tp,
	59	xfs_ino_t ino,
	60	struct xfs_bstat_chunk *bc)
1da177e4	61	{
f736d93d	62	struct user_namespace *sb_userns = mp->m_super->s_user_ns;
7dce11db CH	63	struct xfs_icdinode dic; / dinode core info pointer */
7dce11db CH	64	struct xfs_inode ip; / incore inode pointer */
3987848c	65	struct inode *inode;
7035f972	66	struct xfs_bulkstat *buf = bc->buf;
2810bd68	67	int error = -EINVAL;
7dce11db	68
2810bd68 DW	69	if (xfs_internal_inum(mp, ino))
2810bd68 DW	70	goto out_advance;
7dce11db	71
2810bd68	72	error = xfs_iget(mp, tp, ino,
5132ba8f DC	73	(XFS_IGET_DONTCACHE \| XFS_IGET_UNTRUSTED),
5132ba8f DC	74	XFS_ILOCK_SHARED, &ip);
2810bd68 DW	75	if (error == -ENOENT \|\| error == -EINVAL)
2810bd68 DW	76	goto out_advance;
8fe65776	77	if (error)
2810bd68	78	goto out;
1da177e4 LT	79
1da177e4 LT	80	ASSERT(ip != NULL);
92bfc6e7	81	ASSERT(ip->i_imap.im_blkno != 0);
3987848c	82	inode = VFS_I(ip);
1da177e4 LT	83
	84	dic = &ip->i_d;
	85
	86	/* xfs_iget returns the following without needing
	87	* further change.
	88	*/
ceaf603c	89	buf->bs_projectid = ip->i_projid;
1da177e4	90	buf->bs_ino = ino;
f736d93d CH	91	buf->bs_uid = from_kuid(sb_userns, i_uid_into_mnt(mnt_userns, inode));
f736d93d CH	92	buf->bs_gid = from_kgid(sb_userns, i_gid_into_mnt(mnt_userns, inode));
13d2c10b	93	buf->bs_size = ip->i_disk_size;
3987848c	94
54d7b5c1	95	buf->bs_nlink = inode->i_nlink;
7035f972 DW	96	buf->bs_atime = inode->i_atime.tv_sec;
	97	buf->bs_atime_nsec = inode->i_atime.tv_nsec;
	98	buf->bs_mtime = inode->i_mtime.tv_sec;
	99	buf->bs_mtime_nsec = inode->i_mtime.tv_nsec;
	100	buf->bs_ctime = inode->i_ctime.tv_sec;
	101	buf->bs_ctime_nsec = inode->i_ctime.tv_nsec;
9e9a2674	102	buf->bs_gen = inode->i_generation;
c19b3b05	103	buf->bs_mode = inode->i_mode;
3987848c	104
1da177e4	105	buf->bs_xflags = xfs_ip2xflags(ip);
7035f972	106	buf->bs_extsize_blks = dic->di_extsize;
daf83964	107	buf->bs_extents = xfs_ifork_nextents(&ip->i_df);
89d139d5	108	xfs_bulkstat_health(ip, buf);
daf83964	109	buf->bs_aextents = xfs_ifork_nextents(ip->i_afp);
07000ee6	110	buf->bs_forkoff = XFS_IFORK_BOFF(ip);
7035f972	111	buf->bs_version = XFS_BULKSTAT_VERSION_V5;
1da177e4	112
6471e9c5	113	if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
582a7344 CH	114	buf->bs_btime = dic->di_crtime.tv_sec;
582a7344 CH	115	buf->bs_btime_nsec = dic->di_crtime.tv_nsec;
f7ca3522	116	if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
7035f972	117	buf->bs_cowextsize_blks = dic->di_cowextsize;
f7ca3522 DW	118	}
f7ca3522 DW	119
f7e67b20	120	switch (ip->i_df.if_format) {
1da177e4	121	case XFS_DINODE_FMT_DEV:
66f36464	122	buf->bs_rdev = sysv_encode_dev(inode->i_rdev);
1da177e4 LT	123	buf->bs_blksize = BLKDEV_IOSIZE;
	124	buf->bs_blocks = 0;
	125	break;
	126	case XFS_DINODE_FMT_LOCAL:
1da177e4 LT	127	buf->bs_rdev = 0;
	128	buf->bs_blksize = mp->m_sb.sb_blocksize;
	129	buf->bs_blocks = 0;
	130	break;
	131	case XFS_DINODE_FMT_EXTENTS:
	132	case XFS_DINODE_FMT_BTREE:
	133	buf->bs_rdev = 0;
	134	buf->bs_blksize = mp->m_sb.sb_blocksize;
6e73a545	135	buf->bs_blocks = ip->i_nblocks + ip->i_delayed_blks;
1da177e4 LT	136	break;
1da177e4 LT	137	}
f2d67614	138	xfs_iunlock(ip, XFS_ILOCK_SHARED);
44a8736b	139	xfs_irele(ip);
1da177e4	140
2810bd68	141	error = bc->formatter(bc->breq, buf);
e7ee96df	142	if (error == -ECANCELED)
2810bd68 DW	143	goto out_advance;
	144	if (error)
	145	goto out;
1da177e4	146
2810bd68 DW	147	out_advance:
	148	/*
	149	* Advance the cursor to the inode that comes after the one we just
	150	* looked at. We want the caller to move along if the bulkstat
	151	* information was copied successfully; if we tried to grab the inode
	152	* but it's no longer allocated; or if it's internal metadata.
	153	*/
	154	bc->breq->startino = ino + 1;
	155	out:
7dce11db	156	return error;
1da177e4 LT	157	}
1da177e4 LT	158
2810bd68	159	/* Bulkstat a single inode. */
2ee4fa5c	160	int
2ee4fa5c	161	xfs_bulkstat_one(
2810bd68 DW	162	struct xfs_ibulk *breq,
2810bd68 DW	163	bulkstat_one_fmt_pf formatter)
2ee4fa5c	164	{
2810bd68 DW	165	struct xfs_bstat_chunk bc = {
	166	.formatter = formatter,
	167	.breq = breq,
	168	};
	169	int error;
	170
8723d5ba CH	171	if (breq->mnt_userns != &init_user_ns) {
	172	xfs_warn_ratelimited(breq->mp,
	173	"bulkstat not supported inside of idmapped mounts.");
	174	return -EINVAL;
	175	}
	176
2810bd68 DW	177	ASSERT(breq->icount == 1);
2810bd68 DW	178
7035f972	179	bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
707e0dda	180	KM_MAYFAIL);
2810bd68 DW	181	if (!bc.buf)
	182	return -ENOMEM;
	183
f736d93d CH	184	error = xfs_bulkstat_one_int(breq->mp, breq->mnt_userns, NULL,
f736d93d CH	185	breq->startino, &bc);
2810bd68 DW	186
	187	kmem_free(bc.buf);
	188
	189	/*
	190	* If we reported one inode to userspace then we abort because we hit
	191	* the end of the buffer. Don't leak that back to userspace.
	192	*/
e7ee96df	193	if (error == -ECANCELED)
2810bd68 DW	194	error = 0;
	195
	196	return error;
8b56f083 NS	197	}
8b56f083 NS	198
bf4a5af2	199	static int
2810bd68 DW	200	xfs_bulkstat_iwalk(
	201	struct xfs_mount *mp,
	202	struct xfs_trans *tp,
	203	xfs_ino_t ino,
	204	void *data)
1e773c49	205	{
f736d93d	206	struct xfs_bstat_chunk *bc = data;
2810bd68	207	int error;
00275899	208
f736d93d	209	error = xfs_bulkstat_one_int(mp, bc->breq->mnt_userns, tp, ino, data);
2810bd68 DW	210	/* bulkstat just skips over missing inodes */
	211	if (error == -ENOENT \|\| error == -EINVAL)
	212	return 0;
1e773c49 JL	213	return error;
	214	}
	215
1da177e4	216	/*
2810bd68 DW	217	* Check the incoming lastino parameter.
	218	*
	219	* We allow any inode value that could map to physical space inside the
	220	* filesystem because if there are no inodes there, bulkstat moves on to the
	221	* next chunk. In other words, the magic agino value of zero takes us to the
	222	* first chunk in the AG, and an agino value past the end of the AG takes us to
	223	* the first chunk in the next AG.
	224	*
	225	* Therefore we can end early if the requested inode is beyond the end of the
	226	* filesystem or doesn't map properly.
1da177e4	227	*/
2810bd68 DW	228	static inline bool
	229	xfs_bulkstat_already_done(
	230	struct xfs_mount *mp,
	231	xfs_ino_t startino)
1da177e4	232	{
2810bd68 DW	233	xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, startino);
2810bd68 DW	234	xfs_agino_t agino = XFS_INO_TO_AGINO(mp, startino);
1da177e4	235
2810bd68 DW	236	return agno >= mp->m_sb.sb_agcount \|\|
	237	startino != XFS_AGINO_TO_INO(mp, agno, agino);
	238	}
296dfd7f	239
2810bd68 DW	240	/* Return stat information in bulk (by-inode) for the filesystem. */
	241	int
	242	xfs_bulkstat(
	243	struct xfs_ibulk *breq,
	244	bulkstat_one_fmt_pf formatter)
	245	{
	246	struct xfs_bstat_chunk bc = {
	247	.formatter = formatter,
	248	.breq = breq,
	249	};
	250	int error;
bf4a5af2	251
f736d93d CH	252	if (breq->mnt_userns != &init_user_ns) {
	253	xfs_warn_ratelimited(breq->mp,
	254	"bulkstat not supported inside of idmapped mounts.");
	255	return -EINVAL;
	256	}
2810bd68 DW	257	if (xfs_bulkstat_already_done(breq->mp, breq->startino))
2810bd68 DW	258	return 0;
bf4a5af2	259
7035f972	260	bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
707e0dda	261	KM_MAYFAIL);
2810bd68	262	if (!bc.buf)
2451337d	263	return -ENOMEM;
bf4a5af2	264
13d59a2a DW	265	error = xfs_iwalk(breq->mp, NULL, breq->startino, breq->flags,
13d59a2a DW	266	xfs_bulkstat_iwalk, breq->icount, &bc);
6e57c542	267
2810bd68	268	kmem_free(bc.buf);
febe3cbe	269
cd57e594	270	/*
febe3cbe DC	271	* We found some inodes, so clear the error status and return them.
	272	* The lastino pointer will point directly at the inode that triggered
	273	* any error that occurred, so on the next call the error will be
	274	* triggered again and propagated to userspace as there will be no
	275	* formatted inodes in the buffer.
cd57e594	276	*/
2810bd68	277	if (breq->ocount > 0)
febe3cbe DC	278	error = 0;
febe3cbe DC	279
febe3cbe	280	return error;
1da177e4 LT	281	}
1da177e4 LT	282
7035f972 DW	283	/* Convert bulkstat (v5) to bstat (v1). */
	284	void
	285	xfs_bulkstat_to_bstat(
	286	struct xfs_mount *mp,
	287	struct xfs_bstat *bs1,
	288	const struct xfs_bulkstat *bstat)
	289	{
2e616d9f	290	/* memset is needed here because of padding holes in the structure. */
7035f972 DW	291	memset(bs1, 0, sizeof(struct xfs_bstat));
	292	bs1->bs_ino = bstat->bs_ino;
	293	bs1->bs_mode = bstat->bs_mode;
	294	bs1->bs_nlink = bstat->bs_nlink;
	295	bs1->bs_uid = bstat->bs_uid;
	296	bs1->bs_gid = bstat->bs_gid;
	297	bs1->bs_rdev = bstat->bs_rdev;
	298	bs1->bs_blksize = bstat->bs_blksize;
	299	bs1->bs_size = bstat->bs_size;
	300	bs1->bs_atime.tv_sec = bstat->bs_atime;
	301	bs1->bs_mtime.tv_sec = bstat->bs_mtime;
	302	bs1->bs_ctime.tv_sec = bstat->bs_ctime;
	303	bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;
	304	bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;
	305	bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;
	306	bs1->bs_blocks = bstat->bs_blocks;
	307	bs1->bs_xflags = bstat->bs_xflags;
	308	bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);
	309	bs1->bs_extents = bstat->bs_extents;
	310	bs1->bs_gen = bstat->bs_gen;
	311	bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;
	312	bs1->bs_forkoff = bstat->bs_forkoff;
	313	bs1->bs_projid_hi = bstat->bs_projectid >> 16;
	314	bs1->bs_sick = bstat->bs_sick;
	315	bs1->bs_checked = bstat->bs_checked;
	316	bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);
	317	bs1->bs_dmevmask = 0;
	318	bs1->bs_dmstate = 0;
	319	bs1->bs_aextents = bstat->bs_aextents;
	320	}
	321
677717fb DW	322	struct xfs_inumbers_chunk {
	323	inumbers_fmt_pf formatter;
	324	struct xfs_ibulk *breq;
	325	};
	326
	327	/*
	328	* INUMBERS
	329	* ========
	330	* This is how we export inode btree records to userspace, so that XFS tools
	331	* can figure out where inodes are allocated.
	332	*/
	333
	334	/*
	335	* Format the inode group structure and report it somewhere.
	336	*
	337	* Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk
	338	* through the filesystem so we move it forward unless there was a runtime
	339	* error. If the formatter tells us the buffer is now full we also move the
	340	* cursor forward and abort the walk.
	341	*/
	342	STATIC int
	343	xfs_inumbers_walk(
	344	struct xfs_mount *mp,
	345	struct xfs_trans *tp,
	346	xfs_agnumber_t agno,
	347	const struct xfs_inobt_rec_incore *irec,
	348	void *data)
faa63e95	349	{
5f19c7fc	350	struct xfs_inumbers inogrp = {
677717fb DW	351	.xi_startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
	352	.xi_alloccount = irec->ir_count - irec->ir_freecount,
	353	.xi_allocmask = ~irec->ir_free,
5f19c7fc	354	.xi_version = XFS_INUMBERS_VERSION_V5,
677717fb DW	355	};
677717fb DW	356	struct xfs_inumbers_chunk *ic = data;
677717fb DW	357	int error;
	358
	359	error = ic->formatter(ic->breq, &inogrp);
e7ee96df	360	if (error && error != -ECANCELED)
677717fb DW	361	return error;
677717fb DW	362
0df5c39b DW	363	ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +
0df5c39b DW	364	XFS_INODES_PER_CHUNK;
677717fb	365	return error;
faa63e95 MM	366	}
faa63e95 MM	367
1da177e4 LT	368	/*
	369	* Return inode number table for the filesystem.
	370	*/
677717fb	371	int
1da177e4	372	xfs_inumbers(
677717fb	373	struct xfs_ibulk *breq,
549fa006	374	inumbers_fmt_pf formatter)
1da177e4	375	{
677717fb DW	376	struct xfs_inumbers_chunk ic = {
	377	.formatter = formatter,
	378	.breq = breq,
	379	};
549fa006 JL	380	int error = 0;
549fa006 JL	381
677717fb DW	382	if (xfs_bulkstat_already_done(breq->mp, breq->startino))
677717fb DW	383	return 0;
549fa006	384
13d59a2a	385	error = xfs_inobt_walk(breq->mp, NULL, breq->startino, breq->flags,
677717fb	386	xfs_inumbers_walk, breq->icount, &ic);
c7cb51dc	387
677717fb DW	388	/*
	389	* We found some inode groups, so clear the error status and return
	390	* them. The lastino pointer will point directly at the inode that
	391	* triggered any error that occurred, so on the next call the error
	392	* will be triggered again and propagated to userspace as there will be
	393	* no formatted inode groups in the buffer.
	394	*/
	395	if (breq->ocount > 0)
	396	error = 0;
c7cb51dc	397
1da177e4 LT	398	return error;
1da177e4 LT	399	}
5f19c7fc DW	400
	401	/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
	402	void
	403	xfs_inumbers_to_inogrp(
	404	struct xfs_inogrp *ig1,
	405	const struct xfs_inumbers *ig)
	406	{
2e616d9f DW	407	/* memset is needed here because of padding holes in the structure. */
2e616d9f DW	408	memset(ig1, 0, sizeof(struct xfs_inogrp));
5f19c7fc DW	409	ig1->xi_startino = ig->xi_startino;
	410	ig1->xi_alloccount = ig->xi_alloccount;
	411	ig1->xi_allocmask = ig->xi_allocmask;
	412	}