Implement a fallocate function for debugfs, and add some tests to
demonstrate that it works (more or less).
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
debugfs/debug_cmds.ct | 3 +
debugfs/debugfs.8.in | 7 +
debugfs/debugfs.c | 36 +++++++
debugfs/debugfs.h | 1
tests/d_fallocate/expect.gz | Bin
tests/d_fallocate/name | 1
tests/d_fallocate/script | 175 ++++++++++++++++++++++++++++++++++
tests/d_fallocate_bigalloc/expect.gz | Bin
tests/d_fallocate_bigalloc/name | 1
tests/d_fallocate_bigalloc/script | 176 ++++++++++++++++++++++++++++++++++
tests/d_fallocate_blkmap/expect | 58 +++++++++++
tests/d_fallocate_blkmap/name | 1
tests/d_fallocate_blkmap/script | 85 ++++++++++++++++
13 files changed, 544 insertions(+)
create mode 100644 tests/d_fallocate/expect.gz
create mode 100644 tests/d_fallocate/name
create mode 100644 tests/d_fallocate/script
create mode 100644 tests/d_fallocate_bigalloc/expect.gz
create mode 100644 tests/d_fallocate_bigalloc/name
create mode 100644 tests/d_fallocate_bigalloc/script
create mode 100644 tests/d_fallocate_blkmap/expect
create mode 100644 tests/d_fallocate_blkmap/name
create mode 100644 tests/d_fallocate_blkmap/script
diff --git a/debugfs/debug_cmds.ct b/debugfs/debug_cmds.ct
index c6f6d6c..34dad9e 100644
--- a/debugfs/debug_cmds.ct
+++ b/debugfs/debug_cmds.ct
@@ -157,6 +157,9 @@ request do_dirsearch, "Search a directory for a particular filename",
request do_bmap, "Calculate the logical->physical block mapping for an inode",
bmap;
+request do_fallocate, "Allocate uninitialized blocks to an inode",
+ fallocate;
+
request do_punch, "Punch (or truncate) blocks from an inode by deallocating them",
punch, truncate;
diff --git a/debugfs/debugfs.8.in b/debugfs/debugfs.8.in
index 9a09cbf..a463c73 100644
--- a/debugfs/debugfs.8.in
+++ b/debugfs/debugfs.8.in
@@ -306,6 +306,13 @@ from the file \fIfilespec\fR.
Expand the directory
.IR filespec .
.TP
+.BI fallocate " filespec start_block [end_block]
+Allocate and map uninitialized blocks into \fIfilespec\fR between
+logical block \fIstart_block\fR and \fIend_block\fR, inclusive. If
+\fIend_block\fR is not supplied, this function maps until it runs out
+of free disk blocks or the maximum file size is reached. Existing
+mappings are left alone.
+.TP
.BI feature " [fs_feature] [-fs_feature] ..."
Set or clear various filesystem features in the superblock. After setting
or clearing any filesystem features that were requested, print the current
diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
index c677f5f..40ec05f 100644
--- a/debugfs/debugfs.c
+++ b/debugfs/debugfs.c
@@ -2195,6 +2195,42 @@ void do_punch(int argc, char *argv[])
return;
}
}
+
+void do_fallocate(int argc, char *argv[])
+{
+ ext2_ino_t ino;
+ blk64_t start, end;
+ int err;
+ errcode_t errcode;
+
+ if (common_args_process(argc, argv, 3, 4, argv[0],
+ "<file> start_blk [end_blk]",
+ CHECK_FS_RW | CHECK_FS_BITMAPS))
+ return;
+
+ ino = string_to_inode(argv[1]);
+ if (!ino)
+ return;
+ err = strtoblk(argv[0], argv[2], "logical block", &start);
+ if (err)
+ return;
+ if (argc == 4) {
+ err = strtoblk(argv[0], argv[3], "logical block", &end);
+ if (err)
+ return;
+ } else
+ end = ~0;
+
+ errcode = ext2fs_fallocate(current_fs, EXT2_FALLOCATE_INIT_BEYOND_EOF,
+ ino, NULL, ~0ULL, start, end - start + 1);
+
+ if (errcode) {
+ com_err(argv[0], errcode,
+ "while fallocating inode %u from %llu to %llu\n", ino,
+ (unsigned long long) start, (unsigned long long) end);
+ return;
+ }
+}
#endif /* READ_ONLY */
void do_symlink(int argc, char *argv[])
diff --git a/debugfs/debugfs.h b/debugfs/debugfs.h
index e163d0a..76bb22c 100644
--- a/debugfs/debugfs.h
+++ b/debugfs/debugfs.h
@@ -166,6 +166,7 @@ extern void do_imap(int argc, char **argv);
extern void do_set_current_time(int argc, char **argv);
extern void do_supported_features(int argc, char **argv);
extern void do_punch(int argc, char **argv);
+extern void do_fallocate(int argc, char **argv);
extern void do_symlink(int argc, char **argv);
extern void do_dump_mmp(int argc, char **argv);
diff --git a/tests/d_fallocate/expect.gz b/tests/d_fallocate/expect.gz
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diff --git a/tests/d_fallocate/name b/tests/d_fallocate/name
new file mode 100644
index 0000000..72d0ed3
--- /dev/null
+++ b/tests/d_fallocate/name
@@ -0,0 +1 @@
+fallocate sparse files and big files
diff --git a/tests/d_fallocate/script b/tests/d_fallocate/script
new file mode 100644
index 0000000..ae8956e
--- /dev/null
+++ b/tests/d_fallocate/script
@@ -0,0 +1,175 @@
+if test -x $DEBUGFS_EXE; then
+
+FSCK_OPT=-fy
+OUT=$test_name.log
+if [ -f $test_dir/expect.gz ]; then
+ EXP=$test_name.tmp
+ gunzip < $test_dir/expect.gz > $EXP
+else
+ EXP=$test_dir/expect
+fi
+
+cp /dev/null $OUT
+
+cat > $TMPFILE.conf << ENDL
+[fs_types]
+ext4 = {
+ base_features = sparse_super,filetype,resize_inode,dir_index,ext_attr,^has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize,64bit
+ blocksize = 1024
+ inode_size = 256
+ inode_ratio = 16384
+}
+ENDL
+MKE2FS_CONFIG=$TMPFILE.conf $MKE2FS -F -o Linux -b 1024 -O ^bigalloc -T ext4 $TMPFILE 65536 2>&1 | sed -f $cmd_dir/filter.sed >> $OUT 2>&1
+rm -rf $TMPFILE.conf
+
+$FSCK -fy -N test_filesys $TMPFILE > $OUT.new 2>&1
+status=$?
+echo Exit status is $status >> $OUT.new
+sed -f $cmd_dir/filter.sed -e "s;$TMPFILE;test.img;" $OUT.new >> $OUT
+rm -f $OUT.new
+
+echo "debugfs write files" >> $OUT
+make_file() {
+ name="$1"
+ start="$2"
+ flag="$3"
+
+ cat << ENDL
+write /dev/null $name
+sif /$name size 40960
+eo /$name
+set_bmap $flag 10 $((start + 10))
+set_bmap $flag 13 $((start + 13))
+set_bmap $flag 26 $((start + 26))
+set_bmap $flag 29 $((start + 29))
+ec
+sif /$name blocks 8
+setb $((start + 10))
+setb $((start + 13))
+setb $((start + 26))
+setb $((start + 29))
+ENDL
+}
+
+#Files we create:
+# a: fallocate a 40k file
+# b*: falloc sparse file starting at b*
+# c*: falloc spare file ending at c*
+# d: midcluster to midcluster, surrounding sparse
+# e: partial middle cluster alloc
+# f: one big file
+# g*: falloc sparse init file starting at g*
+# h*: falloc sparse init file ending at h*
+# i: midcluster to midcluster, surrounding sparse init
+# j: partial middle cluster alloc
+# k: one big init file
+base=5000
+cat > $TMPFILE.cmd << ENDL
+write /dev/null a
+sif /a size 40960
+fallocate /a 0 39
+ENDL
+echo "ex /a" >> $TMPFILE.cmd2
+
+make_file sample $base --uninit >> $TMPFILE.cmd
+echo "ex /sample" >> $TMPFILE.cmd2
+base=10000
+
+for i in 8 9 10 11 12 13 14 15; do
+ make_file b$i $(($base + (40 * ($i - 8)))) --uninit >> $TMPFILE.cmd
+ echo "fallocate /b$i $i 39" >> $TMPFILE.cmd
+ echo "ex /b$i" >> $TMPFILE.cmd2
+done
+
+for i in 24 25 26 27 28 29 30 31; do
+ make_file c$i $(($base + 320 + (40 * ($i - 24)))) --uninit >> $TMPFILE.cmd
+ echo "fallocate /c$i 0 $i" >> $TMPFILE.cmd
+ echo "ex /c$i" >> $TMPFILE.cmd2
+done
+
+make_file d $(($base + 640)) --uninit >> $TMPFILE.cmd
+echo "fallocate /d 4 35" >> $TMPFILE.cmd
+echo "ex /d" >> $TMPFILE.cmd2
+
+make_file e $(($base + 680)) --uninit >> $TMPFILE.cmd
+echo "fallocate /e 19 20" >> $TMPFILE.cmd
+echo "ex /e" >> $TMPFILE.cmd2
+
+cat >> $TMPFILE.cmd << ENDL
+write /dev/null f
+sif /f size 1024
+eo /f
+set_bmap --uninit 0 9000
+ec
+sif /f blocks 2
+setb 9000
+fallocate /f 0 8999
+ENDL
+echo "ex /f" >> $TMPFILE.cmd2
+
+# Now do it again, but with initialized blocks
+base=20000
+for i in 8 9 10 11 12 13 14 15; do
+ make_file g$i $(($base + (40 * ($i - 8)))) >> $TMPFILE.cmd
+ echo "fallocate /g$i $i 39" >> $TMPFILE.cmd
+ echo "ex /g$i" >> $TMPFILE.cmd2
+done
+
+for i in 24 25 26 27 28 29 30 31; do
+ make_file h$i $(($base + 320 + (40 * ($i - 24)))) >> $TMPFILE.cmd
+ echo "fallocate /h$i 0 $i" >> $TMPFILE.cmd
+ echo "ex /h$i" >> $TMPFILE.cmd2
+done
+
+make_file i $(($base + 640)) >> $TMPFILE.cmd
+echo "fallocate /i 4 35" >> $TMPFILE.cmd
+echo "ex /i" >> $TMPFILE.cmd2
+
+make_file j $(($base + 680)) >> $TMPFILE.cmd
+echo "fallocate /j 19 20" >> $TMPFILE.cmd
+echo "ex /j" >> $TMPFILE.cmd2
+
+cat >> $TMPFILE.cmd << ENDL
+write /dev/null k
+sif /k size 1024
+eo /k
+set_bmap 0 19000
+ec
+sif /k blocks 2
+setb 19000
+fallocate /k 0 8999
+sif /k size 9216000
+ENDL
+echo "ex /k" >> $TMPFILE.cmd2
+
+$DEBUGFS_EXE -w -f $TMPFILE.cmd $TMPFILE > /dev/null 2>&1
+$DEBUGFS_EXE -f $TMPFILE.cmd2 $TMPFILE >> $OUT.new 2>&1
+sed -f $cmd_dir/filter.sed < $OUT.new >> $OUT
+rm -rf $OUT.new $TMPFILE.cmd $TMPFILE.cmd2
+
+$FSCK -fy -N test_filesys $TMPFILE > $OUT.new 2>&1
+status=$?
+echo Exit status is $status >> $OUT.new
+sed -f $cmd_dir/filter.sed -e "s;$TMPFILE;test.img;" $OUT.new >> $OUT
+rm -f $OUT.new
+
+rm -f $TMPFILE
+
+cmp -s $OUT $EXP
+status=$?
+
+if [ "$status" = 0 ] ; then
+ echo "$test_name: $test_description: ok"
+ touch $test_name.ok
+else
+ echo "$test_name: $test_description: failed"
+ diff $DIFF_OPTS $EXP $OUT > $test_name.failed
+ rm -f $test_name.tmp
+fi
+
+unset IMAGE FSCK_OPT OUT EXP
+
+else #if test -x $DEBUGFS_EXE; then
+ echo "$test_name: $test_description: skipped"
+fi
diff --git a/tests/d_fallocate_bigalloc/expect.gz b/tests/d_fallocate_bigalloc/expect.gz
new file mode 100644
index 0000000000000000000000000000000000000000..8640bc29dc71b09810f110d07d84d883b1109b88
GIT binary patch
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diff --git a/tests/d_fallocate_bigalloc/name b/tests/d_fallocate_bigalloc/name
new file mode 100644
index 0000000..915645c
--- /dev/null
+++ b/tests/d_fallocate_bigalloc/name
@@ -0,0 +1 @@
+fallocate sparse files and big files with bigalloc
diff --git a/tests/d_fallocate_bigalloc/script b/tests/d_fallocate_bigalloc/script
new file mode 100644
index 0000000..6b6bf97
--- /dev/null
+++ b/tests/d_fallocate_bigalloc/script
@@ -0,0 +1,176 @@
+if test -x $DEBUGFS_EXE; then
+
+FSCK_OPT=-fy
+OUT=$test_name.log
+if [ -f $test_dir/expect.gz ]; then
+ EXP=$test_name.tmp
+ gunzip < $test_dir/expect.gz > $EXP
+else
+ EXP=$test_dir/expect
+fi
+
+cp /dev/null $OUT
+
+cat > $TMPFILE.conf << ENDL
+[fs_types]
+ext4 = {
+ cluster_size = 8192
+ base_features = sparse_super,filetype,resize_inode,dir_index,ext_attr,^has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize,64bit
+ blocksize = 1024
+ inode_size = 256
+ inode_ratio = 16384
+}
+ENDL
+MKE2FS_CONFIG=$TMPFILE.conf $MKE2FS -F -o Linux -b 1024 -O bigalloc -T ext4 $TMPFILE 65536 2>&1 | sed -f $cmd_dir/filter.sed >> $OUT 2>&1
+rm -rf $TMPFILE.conf
+
+$FSCK -fy -N test_filesys $TMPFILE > $OUT.new 2>&1
+status=$?
+echo Exit status is $status >> $OUT.new
+sed -f $cmd_dir/filter.sed -e "s;$TMPFILE;test.img;" $OUT.new >> $OUT
+rm -f $OUT.new
+
+echo "debugfs write files" >> $OUT
+make_file() {
+ name="$1"
+ start="$2"
+ flag="$3"
+
+ cat << ENDL
+write /dev/null $name
+sif /$name size 40960
+eo /$name
+set_bmap $flag 10 $((start + 10))
+set_bmap $flag 13 $((start + 13))
+set_bmap $flag 26 $((start + 26))
+set_bmap $flag 29 $((start + 29))
+ec
+sif /$name blocks 32
+setb $((start + 10))
+setb $((start + 13))
+setb $((start + 26))
+setb $((start + 29))
+ENDL
+}
+
+#Files we create:
+# a: fallocate a 40k file
+# b*: falloc sparse file starting at b*
+# c*: falloc spare file ending at c*
+# d: midcluster to midcluster, surrounding sparse
+# e: partial middle cluster alloc
+# f: one big file
+# g*: falloc sparse init file starting at g*
+# h*: falloc sparse init file ending at h*
+# i: midcluster to midcluster, surrounding sparse init
+# j: partial middle cluster alloc
+# k: one big init file
+base=5000
+cat > $TMPFILE.cmd << ENDL
+write /dev/null a
+sif /a size 40960
+fallocate /a 0 39
+ENDL
+echo "ex /a" >> $TMPFILE.cmd2
+
+make_file sample $base --uninit >> $TMPFILE.cmd
+echo "ex /sample" >> $TMPFILE.cmd2
+base=10000
+
+for i in 8 9 10 11 12 13 14 15; do
+ make_file b$i $(($base + (40 * ($i - 8)))) --uninit >> $TMPFILE.cmd
+ echo "fallocate /b$i $i 39" >> $TMPFILE.cmd
+ echo "ex /b$i" >> $TMPFILE.cmd2
+done
+
+for i in 24 25 26 27 28 29 30 31; do
+ make_file c$i $(($base + 320 + (40 * ($i - 24)))) --uninit >> $TMPFILE.cmd
+ echo "fallocate /c$i 0 $i" >> $TMPFILE.cmd
+ echo "ex /c$i" >> $TMPFILE.cmd2
+done
+
+make_file d $(($base + 640)) --uninit >> $TMPFILE.cmd
+echo "fallocate /d 4 35" >> $TMPFILE.cmd
+echo "ex /d" >> $TMPFILE.cmd2
+
+make_file e $(($base + 680)) --uninit >> $TMPFILE.cmd
+echo "fallocate /e 19 20" >> $TMPFILE.cmd
+echo "ex /e" >> $TMPFILE.cmd2
+
+cat >> $TMPFILE.cmd << ENDL
+write /dev/null f
+sif /f size 1024
+eo /f
+set_bmap --uninit 0 9000
+ec
+sif /f blocks 16
+setb 9000
+fallocate /f 0 8999
+ENDL
+echo "ex /f" >> $TMPFILE.cmd2
+
+# Now do it again, but with initialized blocks
+base=20000
+for i in 8 9 10 11 12 13 14 15; do
+ make_file g$i $(($base + (40 * ($i - 8)))) >> $TMPFILE.cmd
+ echo "fallocate /g$i $i 39" >> $TMPFILE.cmd
+ echo "ex /g$i" >> $TMPFILE.cmd2
+done
+
+for i in 24 25 26 27 28 29 30 31; do
+ make_file h$i $(($base + 320 + (40 * ($i - 24)))) >> $TMPFILE.cmd
+ echo "fallocate /h$i 0 $i" >> $TMPFILE.cmd
+ echo "ex /h$i" >> $TMPFILE.cmd2
+done
+
+make_file i $(($base + 640)) >> $TMPFILE.cmd
+echo "fallocate /i 4 35" >> $TMPFILE.cmd
+echo "ex /i" >> $TMPFILE.cmd2
+
+make_file j $(($base + 680)) >> $TMPFILE.cmd
+echo "fallocate /j 19 20" >> $TMPFILE.cmd
+echo "ex /j" >> $TMPFILE.cmd2
+
+cat >> $TMPFILE.cmd << ENDL
+write /dev/null k
+sif /k size 1024
+eo /k
+set_bmap 0 19000
+ec
+sif /k blocks 16
+setb 19000
+fallocate /k 0 8999
+sif /k size 9216000
+ENDL
+echo "ex /k" >> $TMPFILE.cmd2
+
+$DEBUGFS_EXE -w -f $TMPFILE.cmd $TMPFILE > /dev/null 2>&1
+$DEBUGFS_EXE -f $TMPFILE.cmd2 $TMPFILE >> $OUT.new 2>&1
+sed -f $cmd_dir/filter.sed < $OUT.new >> $OUT
+rm -rf $OUT.new $TMPFILE.cmd $TMPFILE.cmd2
+
+$FSCK -fy -N test_filesys $TMPFILE > $OUT.new 2>&1
+status=$?
+echo Exit status is $status >> $OUT.new
+sed -f $cmd_dir/filter.sed -e "s;$TMPFILE;test.img;" $OUT.new >> $OUT
+rm -f $OUT.new
+
+rm -f $TMPFILE
+
+cmp -s $OUT $EXP
+status=$?
+
+if [ "$status" = 0 ] ; then
+ echo "$test_name: $test_description: ok"
+ touch $test_name.ok
+else
+ echo "$test_name: $test_description: failed"
+ diff $DIFF_OPTS $EXP $OUT > $test_name.failed
+ rm -f $test_name.tmp
+fi
+
+unset IMAGE FSCK_OPT OUT EXP
+
+else #if test -x $DEBUGFS_EXE; then
+ echo "$test_name: $test_description: skipped"
+fi
diff --git a/tests/d_fallocate_blkmap/expect b/tests/d_fallocate_blkmap/expect
new file mode 100644
index 0000000..f7ae606
--- /dev/null
+++ b/tests/d_fallocate_blkmap/expect
@@ -0,0 +1,58 @@
+Creating filesystem with 65536 1k blocks and 4096 inodes
+Superblock backups stored on blocks:
+ 8193, 24577, 40961, 57345
+
+Allocating group tables: done
+Writing inode tables: done
+Writing superblocks and filesystem accounting information: done
+
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+test_filesys: 11/4096 files (0.0% non-contiguous), 2340/65536 blocks
+Exit status is 0
+debugfs write files
+debugfs: stat /a
+Inode: 12 Type: regular Mode: 0666 Flags: 0x0
+Generation: 0 Version: 0x00000000:00000000
+User: 0 Group: 0 Size: 40960
+File ACL: 0 Directory ACL: 0
+Links: 1 Blockcount: 82
+Fragment: Address: 0 Number: 0 Size: 0
+Size of extra inode fields: 28
+BLOCKS:
+(0-1):1312-1313, (2-11):8000-8009, (IND):8010, (12-39):8011-8038
+TOTAL: 41
+
+debugfs: stat /b
+Inode: 13 Type: regular Mode: 0666 Flags: 0x0
+Generation: 0 Version: 0x00000000:00000000
+User: 0 Group: 0 Size: 10240000
+File ACL: 0 Directory ACL: 0
+Links: 1 Blockcount: 20082
+Fragment: Address: 0 Number: 0 Size: 0
+Size of extra inode fields: 28
+BLOCKS:
+(0-11):10000-10011, (IND):10012, (12-267):10013-10268, (DIND):10269, (IND):10270, (268-523):10271-10526, (IND):10527, (524-779):10528-10783, (IND):10784, (780-1035):10785-11040, (IND):11041, (1036-1291):11042-11297, (IND):11298, (1292-1547):11299-11554, (IND):11555, (1548-1803):11556-11811, (IND):11812, (1804-2059):11813-12068, (IND):12069, (2060-2315):12070-12325, (IND):12326, (2316-2571):12327-12582, (IND):12583, (2572-2827):12584-12839, (IND):12840, (2828-3083):12841-13096, (IND):13097, (3084-3339):13098-13353, (IND):13354, (3340-3595):13355-13610, (IND):13611, (3596-3851):13612-13867, (IND):13868, (3852-4107):13869-14124, (IND):14125, (4108-4363):14126-14381, (IND):14382, (4364-4619):14383-14638, (IND):14639, (4620-4875):14640-14895, (IND):14896, (4876-5131):14897-15152, (IND):15153, (5132-5387):15154-15409, (IND):15410, (5388-5643):15411-15666, (IND):15667, (5644-5899):15668-15923, (IND):15924, (5900-6155):15925-16180, (IND):16181, (6156-6411):16182-16437, (IND):16438,!
(6412-6667):16439-16694, (IND):16695, (6668-6923):16696-16951, (IND):16952, (6924-7179):16953-17208, (IND):17209, (7180-7435):17210-17465, (IND):17466, (7436-7691):17467-17722, (IND):17723, (7692-7947):17724-17979, (IND):17980, (7948-8203):17981-18236, (IND):18237, (8204-8459):18238-18493, (IND):18494, (8460-8715):18495-18750, (IND):18751, (8716-8971):18752-19007, (IND):19008, (8972-9227):19009-19264, (IND):19265, (9228-9483):19266-19521, (IND):19522, (9484-9739):19523-19778, (IND):19779, (9740-9995):19780-20035, (IND):20036, (9996-9999):20037-20040
+TOTAL: 10041
+
+Pass 1: Checking inodes, blocks, and sizes
+Pass 2: Checking directory structure
+Pass 3: Checking directory connectivity
+Pass 4: Checking reference counts
+Pass 5: Checking group summary information
+Free blocks count wrong for group #0 (6841, counted=6840).
+Fix? yes
+
+Free blocks count wrong for group #1 (1551, counted=1550).
+Fix? yes
+
+Free blocks count wrong (53116, counted=53114).
+Fix? yes
+
+
+test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
+test_filesys: 13/4096 files (7.7% non-contiguous), 12422/65536 blocks
+Exit status is 1
diff --git a/tests/d_fallocate_blkmap/name b/tests/d_fallocate_blkmap/name
new file mode 100644
index 0000000..ba2b61d
--- /dev/null
+++ b/tests/d_fallocate_blkmap/name
@@ -0,0 +1 @@
+fallocate sparse files and big files on a blockmap fs
diff --git a/tests/d_fallocate_blkmap/script b/tests/d_fallocate_blkmap/script
new file mode 100644
index 0000000..9c48cbc
--- /dev/null
+++ b/tests/d_fallocate_blkmap/script
@@ -0,0 +1,85 @@
+if test -x $DEBUGFS_EXE; then
+
+FSCK_OPT=-fy
+OUT=$test_name.log
+if [ -f $test_dir/expect.gz ]; then
+ EXP=$test_name.tmp
+ gunzip < $test_dir/expect.gz > $EXP1
+else
+ EXP=$test_dir/expect
+fi
+
+cp /dev/null $OUT
+
+cat > $TMPFILE.conf << ENDL
+[fs_types]
+ext4 = {
+ base_features = sparse_super,filetype,resize_inode,dir_index,ext_attr,^has_journal,^extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize,^64bit
+ blocksize = 1024
+ inode_size = 256
+ inode_ratio = 16384
+}
+ENDL
+MKE2FS_CONFIG=$TMPFILE.conf $MKE2FS -F -o Linux -b 1024 -O ^bigalloc -T ext4 $TMPFILE 65536 2>&1 | sed -f $cmd_dir/filter.sed >> $OUT 2>&1
+rm -rf $TMPFILE.conf
+
+$FSCK -fy -N test_filesys $TMPFILE > $OUT.new 2>&1
+status=$?
+echo Exit status is $status >> $OUT.new
+sed -f $cmd_dir/filter.sed -e "s;$TMPFILE;test.img;" $OUT.new >> $OUT
+rm -f $OUT.new
+
+echo "debugfs write files" >> $OUT
+
+#Files we create:
+# a: fallocate a 40k file
+# k: one big file
+base=5000
+cat > $TMPFILE.cmd << ENDL
+write /dev/null a
+sif /a bmap[2] 8000
+sif /a size 40960
+sif /a i_blocks 2
+setb 8000
+fallocate /a 0 39
+
+write /dev/null b
+sif /b size 10240000
+sif /b bmap[0] 10000
+sif /b i_blocks 2
+setb 10000
+fallocate /b 0 9999
+ENDL
+echo "stat /a" >> $TMPFILE.cmd2
+echo "stat /b" >> $TMPFILE.cmd2
+
+$DEBUGFS_EXE -w -f $TMPFILE.cmd $TMPFILE > /dev/null 2>&1
+$DEBUGFS_EXE -f $TMPFILE.cmd2 $TMPFILE >> $OUT.new 2>&1
+sed -f $cmd_dir/filter.sed -e '/^.*time:.*$/d' < $OUT.new >> $OUT
+rm -rf $OUT.new $TMPFILE.cmd $TMPFILE.cmd2
+
+$FSCK -fy -N test_filesys $TMPFILE > $OUT.new 2>&1
+status=$?
+echo Exit status is $status >> $OUT.new
+sed -f $cmd_dir/filter.sed -e "s;$TMPFILE;test.img;" $OUT.new >> $OUT
+rm -f $OUT.new
+
+rm -f $TMPFILE
+
+cmp -s $OUT $EXP
+status=$?
+
+if [ "$status" = 0 ] ; then
+ echo "$test_name: $test_description: ok"
+ touch $test_name.ok
+else
+ echo "$test_name: $test_description: failed"
+ diff $DIFF_OPTS $EXP $OUT > $test_name.failed
+ rm -f $test_name.tmp
+fi
+
+unset IMAGE FSCK_OPT OUT EXP
+
+else #if test -x $DEBUGFS_EXE; then
+ echo "$test_name: $test_description: skipped"
+fi
--
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