From 102a0743326a03cd1a1202ceda21e175b7d3575c Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 20 Feb 2024 01:20:52 +0000
Subject: [PATCH] add new system file
---
kernel/fs/xfs/xfs_itable.c | 774 ++++++++++++++++++++---------------------------------------
1 files changed, 266 insertions(+), 508 deletions(-)
diff --git a/kernel/fs/xfs/xfs_itable.c b/kernel/fs/xfs/xfs_itable.c
index e9508ba..16ca97a 100644
--- a/kernel/fs/xfs/xfs_itable.c
+++ b/kernel/fs/xfs/xfs_itable.c
@@ -14,45 +14,66 @@
#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_trace.h"
#include "xfs_icache.h"
+#include "xfs_health.h"
/*
- * Return stat information for one inode.
- * Return 0 if ok, else errno.
+ * 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.
*/
-int
+
+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, /* mount point for filesystem */
- xfs_ino_t ino, /* inode to get data for */
- void __user *buffer, /* buffer to place output in */
- int ubsize, /* size of buffer */
- bulkstat_one_fmt_pf formatter, /* formatter, copy to user */
- int *ubused, /* bytes used by me */
- int *stat) /* BULKSTAT_RV_... */
+ struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ xfs_ino_t ino,
+ struct xfs_bstat_chunk *bc)
{
struct xfs_icdinode *dic; /* dinode core info pointer */
struct xfs_inode *ip; /* incore inode pointer */
struct inode *inode;
- struct xfs_bstat *buf; /* return buffer */
- int error = 0; /* error value */
+ struct xfs_bulkstat *buf = bc->buf;
+ int error = -EINVAL;
- *stat = BULKSTAT_RV_NOTHING;
+ if (xfs_internal_inum(mp, ino))
+ goto out_advance;
- if (!buffer || xfs_internal_inum(mp, ino))
- return -EINVAL;
-
- buf = kmem_zalloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
- if (!buf)
- return -ENOMEM;
-
- error = xfs_iget(mp, NULL, ino,
+ 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_free;
+ goto out;
ASSERT(ip != NULL);
ASSERT(ip->i_imap.im_blkno != 0);
@@ -63,39 +84,38 @@
/* xfs_iget returns the following without needing
* further change.
*/
- buf->bs_projid_lo = dic->di_projid_lo;
- buf->bs_projid_hi = dic->di_projid_hi;
+ buf->bs_projectid = ip->i_d.di_projid;
buf->bs_ino = ino;
- buf->bs_uid = dic->di_uid;
- buf->bs_gid = dic->di_gid;
+ buf->bs_uid = i_uid_read(inode);
+ buf->bs_gid = i_gid_read(inode);
buf->bs_size = dic->di_size;
buf->bs_nlink = inode->i_nlink;
- buf->bs_atime.tv_sec = inode->i_atime.tv_sec;
- buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec;
- buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec;
- buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec;
- buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec;
- buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec;
+ 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_btime = dic->di_crtime.tv_sec;
+ buf->bs_btime_nsec = dic->di_crtime.tv_nsec;
buf->bs_gen = inode->i_generation;
buf->bs_mode = inode->i_mode;
buf->bs_xflags = xfs_ip2xflags(ip);
- buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
- buf->bs_extents = dic->di_nextents;
- memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
- buf->bs_dmevmask = dic->di_dmevmask;
- buf->bs_dmstate = dic->di_dmstate;
- buf->bs_aextents = dic->di_anextents;
+ 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 (dic->di_version == 3) {
+ if (xfs_sb_version_has_v3inode(&mp->m_sb)) {
if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
- buf->bs_cowextsize = dic->di_cowextsize <<
- mp->m_sb.sb_blocklog;
+ buf->bs_cowextsize_blks = dic->di_cowextsize;
}
- switch (dic->di_format) {
+ 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;
@@ -116,387 +136,121 @@
xfs_iunlock(ip, XFS_ILOCK_SHARED);
xfs_irele(ip);
- error = formatter(buffer, ubsize, ubused, buf);
- if (!error)
- *stat = BULKSTAT_RV_DIDONE;
+ error = bc->formatter(bc->breq, buf);
+ if (error == -ECANCELED)
+ goto out_advance;
+ if (error)
+ goto out;
- out_free:
- kmem_free(buf);
+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;
}
-/* Return 0 on success or positive error */
-STATIC int
-xfs_bulkstat_one_fmt(
- void __user *ubuffer,
- int ubsize,
- int *ubused,
- const xfs_bstat_t *buffer)
-{
- if (ubsize < sizeof(*buffer))
- return -ENOMEM;
- if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
- return -EFAULT;
- if (ubused)
- *ubused = sizeof(*buffer);
- return 0;
-}
-
+/* Bulkstat a single inode. */
int
xfs_bulkstat_one(
- xfs_mount_t *mp, /* mount point for filesystem */
- xfs_ino_t ino, /* inode number to get data for */
- void __user *buffer, /* buffer to place output in */
- int ubsize, /* size of buffer */
- int *ubused, /* bytes used by me */
- int *stat) /* BULKSTAT_RV_... */
+ struct xfs_ibulk *breq,
+ bulkstat_one_fmt_pf formatter)
{
- return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
- xfs_bulkstat_one_fmt, ubused, stat);
-}
+ struct xfs_bstat_chunk bc = {
+ .formatter = formatter,
+ .breq = breq,
+ };
+ int error;
-/*
- * Loop over all clusters in a chunk for a given incore inode allocation btree
- * record. Do a readahead if there are any allocated inodes in that cluster.
- */
-STATIC void
-xfs_bulkstat_ichunk_ra(
- struct xfs_mount *mp,
- xfs_agnumber_t agno,
- struct xfs_inobt_rec_incore *irec)
-{
- xfs_agblock_t agbno;
- struct blk_plug plug;
- int blks_per_cluster;
- int inodes_per_cluster;
- int i; /* inode chunk index */
+ ASSERT(breq->icount == 1);
- agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
- blks_per_cluster = xfs_icluster_size_fsb(mp);
- inodes_per_cluster = blks_per_cluster << mp->m_sb.sb_inopblog;
+ bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
+ KM_MAYFAIL);
+ if (!bc.buf)
+ return -ENOMEM;
- blk_start_plug(&plug);
- for (i = 0; i < XFS_INODES_PER_CHUNK;
- i += inodes_per_cluster, agbno += blks_per_cluster) {
- if (xfs_inobt_maskn(i, inodes_per_cluster) & ~irec->ir_free) {
- xfs_btree_reada_bufs(mp, agno, agbno, blks_per_cluster,
- &xfs_inode_buf_ops);
- }
- }
- blk_finish_plug(&plug);
-}
+ error = xfs_bulkstat_one_int(breq->mp, NULL, breq->startino, &bc);
-/*
- * Lookup the inode chunk that the given inode lives in and then get the record
- * if we found the chunk. If the inode was not the last in the chunk and there
- * are some left allocated, update the data for the pointed-to record as well as
- * return the count of grabbed inodes.
- */
-STATIC int
-xfs_bulkstat_grab_ichunk(
- struct xfs_btree_cur *cur, /* btree cursor */
- xfs_agino_t agino, /* starting inode of chunk */
- int *icount,/* return # of inodes grabbed */
- struct xfs_inobt_rec_incore *irec) /* btree record */
-{
- int idx; /* index into inode chunk */
- int stat;
- int error = 0;
-
- /* Lookup the inode chunk that this inode lives in */
- error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
- if (error)
- return error;
- if (!stat) {
- *icount = 0;
- return error;
- }
-
- /* Get the record, should always work */
- error = xfs_inobt_get_rec(cur, irec, &stat);
- if (error)
- return error;
- XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1);
-
- /* Check if the record contains the inode in request */
- if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) {
- *icount = 0;
- return 0;
- }
-
- idx = agino - irec->ir_startino + 1;
- if (idx < XFS_INODES_PER_CHUNK &&
- (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
- int i;
-
- /* We got a right chunk with some left inodes allocated at it.
- * Grab the chunk record. Mark all the uninteresting inodes
- * free -- because they're before our start point.
- */
- for (i = 0; i < idx; i++) {
- if (XFS_INOBT_MASK(i) & ~irec->ir_free)
- irec->ir_freecount++;
- }
-
- irec->ir_free |= xfs_inobt_maskn(0, idx);
- *icount = irec->ir_count - irec->ir_freecount;
- }
-
- return 0;
-}
-
-#define XFS_BULKSTAT_UBLEFT(ubleft) ((ubleft) >= statstruct_size)
-
-struct xfs_bulkstat_agichunk {
- char __user **ac_ubuffer;/* pointer into user's buffer */
- int ac_ubleft; /* bytes left in user's buffer */
- int ac_ubelem; /* spaces used in user's buffer */
-};
-
-/*
- * Process inodes in chunk with a pointer to a formatter function
- * that will iget the inode and fill in the appropriate structure.
- */
-static int
-xfs_bulkstat_ag_ichunk(
- struct xfs_mount *mp,
- xfs_agnumber_t agno,
- struct xfs_inobt_rec_incore *irbp,
- bulkstat_one_pf formatter,
- size_t statstruct_size,
- struct xfs_bulkstat_agichunk *acp,
- xfs_agino_t *last_agino)
-{
- char __user **ubufp = acp->ac_ubuffer;
- int chunkidx;
- int error = 0;
- xfs_agino_t agino = irbp->ir_startino;
-
- for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK;
- chunkidx++, agino++) {
- int fmterror;
- int ubused;
-
- /* inode won't fit in buffer, we are done */
- if (acp->ac_ubleft < statstruct_size)
- break;
-
- /* Skip if this inode is free */
- if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
- continue;
-
- /* Get the inode and fill in a single buffer */
- ubused = statstruct_size;
- error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino),
- *ubufp, acp->ac_ubleft, &ubused, &fmterror);
-
- if (fmterror == BULKSTAT_RV_GIVEUP ||
- (error && error != -ENOENT && error != -EINVAL)) {
- acp->ac_ubleft = 0;
- ASSERT(error);
- break;
- }
-
- /* be careful not to leak error if at end of chunk */
- if (fmterror == BULKSTAT_RV_NOTHING || error) {
- error = 0;
- continue;
- }
-
- *ubufp += ubused;
- acp->ac_ubleft -= ubused;
- acp->ac_ubelem++;
- }
+ kmem_free(bc.buf);
/*
- * Post-update *last_agino. At this point, agino will always point one
- * inode past the last inode we processed successfully. Hence we
- * substract that inode when setting the *last_agino cursor so that we
- * return the correct cookie to userspace. On the next bulkstat call,
- * the inode under the lastino cookie will be skipped as we have already
- * processed it here.
+ * 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.
*/
- *last_agino = agino - 1;
+ if (error == -ECANCELED)
+ error = 0;
return error;
}
-/*
- * Return stat information in bulk (by-inode) for the filesystem.
- */
-int /* error status */
-xfs_bulkstat(
- xfs_mount_t *mp, /* mount point for filesystem */
- xfs_ino_t *lastinop, /* last inode returned */
- int *ubcountp, /* size of buffer/count returned */
- bulkstat_one_pf formatter, /* func that'd fill a single buf */
- size_t statstruct_size, /* sizeof struct filling */
- char __user *ubuffer, /* buffer with inode stats */
- int *done) /* 1 if there are more stats to get */
+static int
+xfs_bulkstat_iwalk(
+ struct xfs_mount *mp,
+ struct xfs_trans *tp,
+ xfs_ino_t ino,
+ void *data)
{
- xfs_buf_t *agbp; /* agi header buffer */
- xfs_agino_t agino; /* inode # in allocation group */
- xfs_agnumber_t agno; /* allocation group number */
- xfs_btree_cur_t *cur; /* btree cursor for ialloc btree */
- xfs_inobt_rec_incore_t *irbuf; /* start of irec buffer */
- int nirbuf; /* size of irbuf */
- int ubcount; /* size of user's buffer */
- struct xfs_bulkstat_agichunk ac;
- int error = 0;
+ int error;
- /*
- * Get the last inode value, see if there's nothing to do.
- */
- agno = XFS_INO_TO_AGNO(mp, *lastinop);
- agino = XFS_INO_TO_AGINO(mp, *lastinop);
- if (agno >= mp->m_sb.sb_agcount ||
- *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) {
- *done = 1;
- *ubcountp = 0;
+ error = xfs_bulkstat_one_int(mp, tp, ino, data);
+ /* bulkstat just skips over missing inodes */
+ if (error == -ENOENT || error == -EINVAL)
return 0;
- }
+ return error;
+}
- ubcount = *ubcountp; /* statstruct's */
- ac.ac_ubuffer = &ubuffer;
- ac.ac_ubleft = ubcount * statstruct_size; /* bytes */;
- ac.ac_ubelem = 0;
+/*
+ * 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);
- *ubcountp = 0;
- *done = 0;
+ return agno >= mp->m_sb.sb_agcount ||
+ startino != XFS_AGINO_TO_INO(mp, agno, agino);
+}
- irbuf = kmem_zalloc_large(PAGE_SIZE * 4, KM_SLEEP);
- if (!irbuf)
+/* 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 (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;
- nirbuf = (PAGE_SIZE * 4) / sizeof(*irbuf);
- /*
- * Loop over the allocation groups, starting from the last
- * inode returned; 0 means start of the allocation group.
- */
- while (agno < mp->m_sb.sb_agcount) {
- struct xfs_inobt_rec_incore *irbp = irbuf;
- struct xfs_inobt_rec_incore *irbufend = irbuf + nirbuf;
- bool end_of_ag = false;
- int icount = 0;
- int stat;
+ error = xfs_iwalk(breq->mp, NULL, breq->startino, breq->flags,
+ xfs_bulkstat_iwalk, breq->icount, &bc);
- error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
- if (error)
- break;
- /*
- * Allocate and initialize a btree cursor for ialloc btree.
- */
- cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
- XFS_BTNUM_INO);
- if (agino > 0) {
- /*
- * In the middle of an allocation group, we need to get
- * the remainder of the chunk we're in.
- */
- struct xfs_inobt_rec_incore r;
-
- error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
- if (error)
- goto del_cursor;
- if (icount) {
- irbp->ir_startino = r.ir_startino;
- irbp->ir_holemask = r.ir_holemask;
- irbp->ir_count = r.ir_count;
- irbp->ir_freecount = r.ir_freecount;
- irbp->ir_free = r.ir_free;
- irbp++;
- }
- /* Increment to the next record */
- error = xfs_btree_increment(cur, 0, &stat);
- } else {
- /* Start of ag. Lookup the first inode chunk */
- error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat);
- }
- if (error || stat == 0) {
- end_of_ag = true;
- goto del_cursor;
- }
-
- /*
- * Loop through inode btree records in this ag,
- * until we run out of inodes or space in the buffer.
- */
- while (irbp < irbufend && icount < ubcount) {
- struct xfs_inobt_rec_incore r;
-
- error = xfs_inobt_get_rec(cur, &r, &stat);
- if (error || stat == 0) {
- end_of_ag = true;
- goto del_cursor;
- }
-
- /*
- * If this chunk has any allocated inodes, save it.
- * Also start read-ahead now for this chunk.
- */
- if (r.ir_freecount < r.ir_count) {
- xfs_bulkstat_ichunk_ra(mp, agno, &r);
- irbp->ir_startino = r.ir_startino;
- irbp->ir_holemask = r.ir_holemask;
- irbp->ir_count = r.ir_count;
- irbp->ir_freecount = r.ir_freecount;
- irbp->ir_free = r.ir_free;
- irbp++;
- icount += r.ir_count - r.ir_freecount;
- }
- error = xfs_btree_increment(cur, 0, &stat);
- if (error || stat == 0) {
- end_of_ag = true;
- goto del_cursor;
- }
- cond_resched();
- }
-
- /*
- * Drop the btree buffers and the agi buffer as we can't hold any
- * of the locks these represent when calling iget. If there is a
- * pending error, then we are done.
- */
-del_cursor:
- xfs_btree_del_cursor(cur, error);
- xfs_buf_relse(agbp);
- if (error)
- break;
- /*
- * Now format all the good inodes into the user's buffer. The
- * call to xfs_bulkstat_ag_ichunk() sets up the agino pointer
- * for the next loop iteration.
- */
- irbufend = irbp;
- for (irbp = irbuf;
- irbp < irbufend && ac.ac_ubleft >= statstruct_size;
- irbp++) {
- error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
- formatter, statstruct_size, &ac,
- &agino);
- if (error)
- break;
-
- cond_resched();
- }
-
- /*
- * If we've run out of space or had a formatting error, we
- * are now done
- */
- if (ac.ac_ubleft < statstruct_size || error)
- break;
-
- if (end_of_ag) {
- agno++;
- agino = 0;
- }
- }
- /*
- * Done, we're either out of filesystem or space to put the data.
- */
- kmem_free(irbuf);
- *ubcountp = ac.ac_ubelem;
+ kmem_free(bc.buf);
/*
* We found some inodes, so clear the error status and return them.
@@ -505,135 +259,139 @@
* triggered again and propagated to userspace as there will be no
* formatted inodes in the buffer.
*/
- if (ac.ac_ubelem)
+ if (breq->ocount > 0)
error = 0;
-
- /*
- * If we ran out of filesystem, lastino will point off the end of
- * the filesystem so the next call will return immediately.
- */
- *lastinop = XFS_AGINO_TO_INO(mp, agno, agino);
- if (agno >= mp->m_sb.sb_agcount)
- *done = 1;
return error;
}
-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 */
+/* Convert bulkstat (v5) to bstat (v1). */
+void
+xfs_bulkstat_to_bstat(
+ struct xfs_mount *mp,
+ struct xfs_bstat *bs1,
+ const struct xfs_bulkstat *bstat)
{
- if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
- return -EFAULT;
- *written = count * sizeof(*buffer);
- return 0;
+ /* 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 /* error status */
+int
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 */
+ struct xfs_ibulk *breq,
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;
+ struct xfs_inumbers_chunk ic = {
+ .formatter = formatter,
+ .breq = breq,
+ };
int error = 0;
- *count = 0;
- if (agno >= mp->m_sb.sb_agcount ||
- *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
- return error;
+ if (xfs_bulkstat_already_done(breq->mp, breq->startino))
+ return 0;
- bcount = min(left, (int)(PAGE_SIZE / sizeof(*buffer)));
- buffer = kmem_zalloc(bcount * sizeof(*buffer), KM_SLEEP);
- do {
- struct xfs_inobt_rec_incore r;
- int stat;
+ error = xfs_inobt_walk(breq->mp, NULL, breq->startino, breq->flags,
+ xfs_inumbers_walk, breq->icount, &ic);
- 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 = r.ir_count - 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;
- agno++;
- } 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);
- if (agbp)
- xfs_buf_relse(agbp);
+ /*
+ * 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;
+}
--
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