1 # Put test-related bits that are parted-specific here.
2 # This file is sourced from the testing framework.
3 sector_size_=${PARTED_SECTOR_SIZE:-512}
5 scsi_debug_lock_dir_="$abs_srcdir/scsi_debug.lock"
7 require_scsi_debug_module_()
9 require_udevadm_settle_
10 # check for scsi_debug module
11 modprobe -n scsi_debug ||
12 skip_ "you lack the scsi_debug kernel module"
15 scsi_debug_modprobe_succeeded_=
17 # Always run this cleanup function.
18 cleanup_final_() { scsi_debug_cleanup_; }
22 # This function must always release the lock.
23 # If modprobe succeeded, it must be sure to run rmmod.
24 if test -n "$scsi_debug_modprobe_succeeded_"; then
25 # We have to insist. Otherwise, a single rmmod usually fails to remove it,
26 # due either to "Resource temporarily unavailable" or to
27 # "Module scsi_debug is in use".
30 while [ $i -lt 10 ] ; do
32 && { test "$VERBOSE" = yes && warn_ $ME_ rmmod scsi_debug...; break; }
38 rm -fr $scsi_debug_lock_dir_
41 # Helper function: wait 2s (via .1s increments) for FILE to appear.
42 # Usage: wait_for_dev_to_appear_ /dev/sdg
43 # Return 0 upon success, 1 upon failure.
44 wait_for_dev_to_appear_()
50 ls "$file" > /dev/null 2>&1 && return 0
51 sleep .1 2>/dev/null || { sleep 1; incr=10; }
52 i=$(expr $i + $incr); test $i = 20 && break
57 # Tests that uses "modprobe scsi_debug ..." must not be run in parallel.
58 scsi_debug_acquire_lock_()
61 local lock_timeout_stale_seconds=120
63 # If it was created more than $lock_timeout_stale_seconds ago, remove it.
64 # FIXME: implement this
69 mkdir "$scsi_debug_lock_dir_" && return 0
70 sleep .1 2>/dev/null || { sleep 1; incr=10; }
71 i=$(expr $i + $incr); test $i = $(expr $retries \* 10) && break
74 warn_ "$ME_: failed to acquire lock: $scsi_debug_lock_dir_"
78 # If there is a scsi_debug device, print the corresponding "sdN" and return 0.
79 # Otherwise, return 1.
82 local m; m=$(grep -lw scsi_debug /sys/block/sd*/device/model) || return 1
84 # Remove the /sys/block/ prefix, and then the /device/model suffix.
91 # Create a device using the scsi_debug module with the options passed to
92 # this function as arguments. Upon success, print the name of the new device.
95 scsi_debug_acquire_lock_
97 # It is not trivial to determine the name of the device we're creating.
98 # Record the names of all /sys/block/sd* devices *before* probing:
100 modprobe scsi_debug "$@" || { rm -f stamp; return 1; }
101 scsi_debug_modprobe_succeeded_=1
102 test "$VERBOSE" = yes \
103 && warn_ $ME_ modprobe scsi_debug succeeded
105 # Wait up to 2s (via .1s increments) for the list of devices to change.
106 # Sleeping for a fraction of a second requires GNU sleep, so fall
107 # back on sleeping 2x1s if that fails.
108 # FIXME-portability: using "cmp - ..." probably requires GNU cmp.
113 new_dev=$(new_sdX_) && break
114 sleep .1 2>/dev/null || { sleep 1; incr=10; }
115 i=$(expr $i + $incr); test $i = 20 && break
121 *) warn_ $ME_ unexpected device name: $new_dev; return 1 ;;
123 local t=/dev/$new_dev
124 wait_for_dev_to_appear_ $t
129 require_512_byte_sector_size_()
131 test $sector_size_ = 512 \
132 || skip_ FS test with sector size != 512
137 case $# in 2) ;; *) echo "usage: peek_ FILE 0_BASED_OFFSET" >&2; exit 1;; esac
138 case $2 in *[^0-9]*) echo "peek_: invalid offset: $2" >&2; exit 1 ;; esac
139 dd if="$1" bs=1 skip="$2" count=1
144 case $# in 3) ;; *) echo "usage: poke_ FILE 0_BASED_OFFSET BYTE" >&2; exit 1;;
146 case $2 in *[^0-9]*) echo "poke_: invalid offset: $2" >&2; exit 1 ;; esac
147 case $3 in ?) ;; *) echo "poke_: invalid byte: '$3'" >&2; exit 1 ;; esac
148 printf %s "$3" | dd of="$1" bs=1 seek="$2" count=1 conv=notrunc
151 # byte 56 of the partition entry is the first byte of its 72-byte name field
152 gpt1_pte_name_offset_()
155 case $ss in *[^0-9]*) echo "$0: invalid sector size: $ss">&2; return 1;; esac
160 # Change the name of the first partition in the primary GPT table,
161 # thus invalidating the PartitionEntryArrayCRC32 checksum.
162 gpt_corrupt_primary_table_()
164 case $# in 2) ;; *) echo "$0: expected 2 args, got $#" >&2; return 1;; esac
167 case $ss in *[^0-9]*) echo "$0: invalid sector size: $ss">&2; return 1;; esac
169 # get the first byte of the name
170 local orig_pte_name_byte
171 orig_pte_name_byte=$(peek_ $dev $(gpt1_pte_name_offset_ $ss)) || return 1
174 test x"$orig_pte_name_byte" = xA && new_byte=B || new_byte=A
176 # Replace with a different byte
177 poke_ $dev $(gpt1_pte_name_offset_ $ss) "$new_byte" || return 1
179 printf %s "$orig_pte_name_byte"
183 gpt_restore_primary_table_()
185 case $# in 3) ;; *) echo "$0: expected 2 args, got $#" >&2; return 1;; esac
188 case $ss in *[^0-9]*) echo "$0: invalid sector size: $ss">&2; return 1;; esac
190 poke_ $dev $(gpt1_pte_name_offset_ $ss) "$orig_byte" || return 1
193 . "$abs_top_srcdir/tests/t-lvm.sh"