| Message ID | 20221207093147.1634425-3-ZiyangZhang@linux.alibaba.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | cleanup and bugfix for xfs tests related to btree format | expand |
On Wed, Dec 07, 2022 at 05:31:47PM +0800, Ziyang Zhang wrote: > Sometimes "$((128 * dblksz / 40))" dirents cannot make sure that > S_IFDIR.FMT_BTREE could become btree format for its DATA fork. > > Actually we just observed it can fail after apply our inode > extent-to-btree workaround. The root cause is that the kernel may be > too good at allocating consecutive blocks so that the data fork is > still in extents format. > > Therefore instead of using a fixed number, let's make sure the number > of extents is large enough than (inode size - inode core size) / > sizeof(xfs_bmbt_rec_t). > > Suggested-by: "Darrick J. Wong" <djwong@kernel.org> > Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> > Signed-off-by: Ziyang Zhang <ZiyangZhang@linux.alibaba.com> > --- > common/populate | 34 +++++++++++++++++++++++++++++++++- > common/xfs | 9 +++++++++ > 2 files changed, 42 insertions(+), 1 deletion(-) > > diff --git a/common/populate b/common/populate > index 6e004997..95cf56de 100644 > --- a/common/populate > +++ b/common/populate > @@ -71,6 +71,37 @@ __populate_create_dir() { > done > } > > +# Create a large directory and ensure that it's a btree format > +__populate_xfs_create_btree_dir() { > + local name="$1" > + local isize="$2" > + local missing="$3" > + local icore_size="$(_xfs_inode_core_bytes)" > + # We need enough extents to guarantee that the data fork is in > + # btree format. Cycling the mount to use xfs_db is too slow, so > + # watch for when the extent count exceeds the space after the > + # inode core. > + local max_nextents="$(((isize - icore_size) / 16))" > + > + mkdir -p "${name}" > + nr=0 > + while true; do > + creat=mkdir > + test "$((nr % 20))" -eq 0 && creat=touch > + $creat "${name}/$(printf "%.08d" "$nr")" > + if [ "$((nr % 40))" -eq 0 ]; then > + nextents="$(_xfs_get_fsxattr nextents $name)" > + [ $nextents -gt $max_nextents ] && break > + fi > + nr=$((nr+1)) > + done > + > + test -z "${missing}" && return > + seq 1 2 "${nr}" | while read d; do > + rm -rf "${name}/$(printf "%.08d" "$d")" > + done Oh, you've done this change in V4, sorry I just reviewed an old version. A little picky review points as below: This function makes sense to me, just the "local" key word is used so randomly, some variables have, some doesn't :) > +} > + > # Add a bunch of attrs to a file > __populate_create_attr() { > name="$1" > @@ -176,6 +207,7 @@ _scratch_xfs_populate() { > > blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")" > dblksz="$(_xfs_get_dir_blocksize "$SCRATCH_MNT")" > + isize="$(_xfs_inode_size "$SCRATCH_MNT")" > crc="$(_xfs_has_feature "$SCRATCH_MNT" crc -v)" > if [ $crc -eq 1 ]; then > leaf_hdr_size=64 > @@ -226,7 +258,7 @@ _scratch_xfs_populate() { > > # - BTREE > echo "+ btree dir" > - __populate_create_dir "${SCRATCH_MNT}/S_IFDIR.FMT_BTREE" "$((128 * dblksz / 40))" true > + __populate_xfs_create_btree_dir "${SCRATCH_MNT}/S_IFDIR.FMT_BTREE" "$isize" true > > # Symlinks > # - FMT_LOCAL > diff --git a/common/xfs b/common/xfs > index 5074c350..3bfe8566 100644 > --- a/common/xfs > +++ b/common/xfs > @@ -1487,6 +1487,15 @@ _require_xfsrestore_xflag() > _notrun 'xfsrestore does not support -x flag.' > } > > +# Number of bytes reserved for a full inode record, which includes the > +# immediate fork areas. > +_xfs_inode_size() Generally common/xfs names this kind of helpers as _xfs_get_xxxx(), likes _xfs_get_rtextents() _xfs_get_rtextsize() _xfs_get_dir_blocksize() ... > +{ > + local mntpoint="$1" > + > + $XFS_INFO_PROG "$mntpoint" | grep 'meta-data=.*isize' | sed -e 's/^.*isize=\([0-9]*\).*$/\1/g' It can be done with one pipe: $XFS_INFO_PROG "$mntpoint" | sed -n '/meta-data=.*isize/s/^.*isize=\([0-9]*\).*$/\1/p' With above changes you can have: Reviewed-by: Zorro Lang <zlang@redhat.com> > +} > + > # Number of bytes reserved for only the inode record, excluding the > # immediate fork areas. > _xfs_inode_core_bytes() > -- > 2.18.4 >
On Thu, Dec 08, 2022 at 02:28:50AM +0800, Zorro Lang wrote: > On Wed, Dec 07, 2022 at 05:31:47PM +0800, Ziyang Zhang wrote: > > Sometimes "$((128 * dblksz / 40))" dirents cannot make sure that > > S_IFDIR.FMT_BTREE could become btree format for its DATA fork. > > > > Actually we just observed it can fail after apply our inode > > extent-to-btree workaround. The root cause is that the kernel may be > > too good at allocating consecutive blocks so that the data fork is > > still in extents format. > > > > Therefore instead of using a fixed number, let's make sure the number > > of extents is large enough than (inode size - inode core size) / > > sizeof(xfs_bmbt_rec_t). > > > > Suggested-by: "Darrick J. Wong" <djwong@kernel.org> > > Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> > > Signed-off-by: Ziyang Zhang <ZiyangZhang@linux.alibaba.com> > > --- > > common/populate | 34 +++++++++++++++++++++++++++++++++- > > common/xfs | 9 +++++++++ > > 2 files changed, 42 insertions(+), 1 deletion(-) > > > > diff --git a/common/populate b/common/populate > > index 6e004997..95cf56de 100644 > > --- a/common/populate > > +++ b/common/populate > > @@ -71,6 +71,37 @@ __populate_create_dir() { > > done > > } > > > > +# Create a large directory and ensure that it's a btree format > > +__populate_xfs_create_btree_dir() { > > + local name="$1" > > + local isize="$2" > > + local missing="$3" > > + local icore_size="$(_xfs_inode_core_bytes)" > > + # We need enough extents to guarantee that the data fork is in > > + # btree format. Cycling the mount to use xfs_db is too slow, so > > + # watch for when the extent count exceeds the space after the > > + # inode core. > > + local max_nextents="$(((isize - icore_size) / 16))" > > + > > + mkdir -p "${name}" > > + nr=0 > > + while true; do > > + creat=mkdir > > + test "$((nr % 20))" -eq 0 && creat=touch > > + $creat "${name}/$(printf "%.08d" "$nr")" > > + if [ "$((nr % 40))" -eq 0 ]; then > > + nextents="$(_xfs_get_fsxattr nextents $name)" > > + [ $nextents -gt $max_nextents ] && break > > + fi > > + nr=$((nr+1)) > > + done > > + > > + test -z "${missing}" && return > > + seq 1 2 "${nr}" | while read d; do > > + rm -rf "${name}/$(printf "%.08d" "$d")" > > + done > > Oh, you've done this change in V4, sorry I just reviewed an old version. A > little picky review points as below: > > This function makes sense to me, just the "local" key word is used so randomly, > some variables have, some doesn't :) All variables inside a helper function *should* be using 'local', unless the goal is to set variables in an ancestor scope. Note that this can mean variables in the top level namespace, or a different function further up in the call stack. Unfortunately, I didn't know about this bashism when I started writing fstests, which is why it's inconsistent all over the place. :( This little script: #!/bin/bash moo=5 bar() { moo=$((moo + 1)) } fubar() { bar } cow() { local moo=7 bar echo "cow $moo" } grud() { local moo=11 fubar echo "grud $moo" } cow bar echo "global $moo" grud echo "global $moo" fubar echo "global $moo" Prints this on output: $ ./demo.sh global 5 cow 8 global 5 global 6 grud 12 global 6 global 7 --D > > +} > > + > > # Add a bunch of attrs to a file > > __populate_create_attr() { > > name="$1" > > @@ -176,6 +207,7 @@ _scratch_xfs_populate() { > > > > blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")" > > dblksz="$(_xfs_get_dir_blocksize "$SCRATCH_MNT")" > > + isize="$(_xfs_inode_size "$SCRATCH_MNT")" > > crc="$(_xfs_has_feature "$SCRATCH_MNT" crc -v)" > > if [ $crc -eq 1 ]; then > > leaf_hdr_size=64 > > @@ -226,7 +258,7 @@ _scratch_xfs_populate() { > > > > # - BTREE > > echo "+ btree dir" > > - __populate_create_dir "${SCRATCH_MNT}/S_IFDIR.FMT_BTREE" "$((128 * dblksz / 40))" true > > + __populate_xfs_create_btree_dir "${SCRATCH_MNT}/S_IFDIR.FMT_BTREE" "$isize" true > > > > # Symlinks > > # - FMT_LOCAL > > diff --git a/common/xfs b/common/xfs > > index 5074c350..3bfe8566 100644 > > --- a/common/xfs > > +++ b/common/xfs > > @@ -1487,6 +1487,15 @@ _require_xfsrestore_xflag() > > _notrun 'xfsrestore does not support -x flag.' > > } > > > > +# Number of bytes reserved for a full inode record, which includes the > > +# immediate fork areas. > > +_xfs_inode_size() > > Generally common/xfs names this kind of helpers as _xfs_get_xxxx(), likes > _xfs_get_rtextents() > _xfs_get_rtextsize() > _xfs_get_dir_blocksize() > ... > > > +{ > > + local mntpoint="$1" > > + > > + $XFS_INFO_PROG "$mntpoint" | grep 'meta-data=.*isize' | sed -e 's/^.*isize=\([0-9]*\).*$/\1/g' > > It can be done with one pipe: > $XFS_INFO_PROG "$mntpoint" | sed -n '/meta-data=.*isize/s/^.*isize=\([0-9]*\).*$/\1/p' > > With above changes you can have: > Reviewed-by: Zorro Lang <zlang@redhat.com> > > > +} > > + > > # Number of bytes reserved for only the inode record, excluding the > > # immediate fork areas. > > _xfs_inode_core_bytes() > > -- > > 2.18.4 > > >
diff --git a/common/populate b/common/populate index 6e004997..95cf56de 100644 --- a/common/populate +++ b/common/populate @@ -71,6 +71,37 @@ __populate_create_dir() { done } +# Create a large directory and ensure that it's a btree format +__populate_xfs_create_btree_dir() { + local name="$1" + local isize="$2" + local missing="$3" + local icore_size="$(_xfs_inode_core_bytes)" + # We need enough extents to guarantee that the data fork is in + # btree format. Cycling the mount to use xfs_db is too slow, so + # watch for when the extent count exceeds the space after the + # inode core. + local max_nextents="$(((isize - icore_size) / 16))" + + mkdir -p "${name}" + nr=0 + while true; do + creat=mkdir + test "$((nr % 20))" -eq 0 && creat=touch + $creat "${name}/$(printf "%.08d" "$nr")" + if [ "$((nr % 40))" -eq 0 ]; then + nextents="$(_xfs_get_fsxattr nextents $name)" + [ $nextents -gt $max_nextents ] && break + fi + nr=$((nr+1)) + done + + test -z "${missing}" && return + seq 1 2 "${nr}" | while read d; do + rm -rf "${name}/$(printf "%.08d" "$d")" + done +} + # Add a bunch of attrs to a file __populate_create_attr() { name="$1" @@ -176,6 +207,7 @@ _scratch_xfs_populate() { blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")" dblksz="$(_xfs_get_dir_blocksize "$SCRATCH_MNT")" + isize="$(_xfs_inode_size "$SCRATCH_MNT")" crc="$(_xfs_has_feature "$SCRATCH_MNT" crc -v)" if [ $crc -eq 1 ]; then leaf_hdr_size=64 @@ -226,7 +258,7 @@ _scratch_xfs_populate() { # - BTREE echo "+ btree dir" - __populate_create_dir "${SCRATCH_MNT}/S_IFDIR.FMT_BTREE" "$((128 * dblksz / 40))" true + __populate_xfs_create_btree_dir "${SCRATCH_MNT}/S_IFDIR.FMT_BTREE" "$isize" true # Symlinks # - FMT_LOCAL diff --git a/common/xfs b/common/xfs index 5074c350..3bfe8566 100644 --- a/common/xfs +++ b/common/xfs @@ -1487,6 +1487,15 @@ _require_xfsrestore_xflag() _notrun 'xfsrestore does not support -x flag.' } +# Number of bytes reserved for a full inode record, which includes the +# immediate fork areas. +_xfs_inode_size() +{ + local mntpoint="$1" + + $XFS_INFO_PROG "$mntpoint" | grep 'meta-data=.*isize' | sed -e 's/^.*isize=\([0-9]*\).*$/\1/g' +} + # Number of bytes reserved for only the inode record, excluding the # immediate fork areas. _xfs_inode_core_bytes()