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swapon: Improve tests for non-standard kernel page size and small media

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Add a test to verify swapon's behavior when attaching to media that's too small.
This also adapts existing tests to accommodate kernel page sizes larger than
the default 4KB.

Approved by:	kib, chs (previous version)
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D51641
This commit is contained in:
Olivier Cochard 2025-07-31 02:10:56 +02:00
parent 6fa24b29d8
commit a01ce3b87d
1 changed files with 52 additions and 8 deletions
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60
sbin/swapon/tests/swapon_test.sh
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@ -31,7 +31,10 @@ attach_mdX_head()
attach_mdX_body()
{
# if the swapfile is too small (like 1k) then mdconfig hangs looking up the md
atf_check -s exit:0 -x "truncate -s 10k swapfile"
# but need a swapfile bigger than one page kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize * 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo 'md31 none swap sw,file=swapfile 0 0'"
atf_check -s exit:0 -o match:"swapon: adding /dev/md31 as swap device" -x "swapon -F fstab.out -a"
}
@ -49,7 +52,10 @@ attach_dev_mdX_head()
attach_dev_mdX_body()
{
# if the swapfile is too small (like 1k) then mdconfig hangs looking up the md
atf_check -s exit:0 -x "truncate -s 10k swapfile"
# but need a swapfile bigger than one page kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize * 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo '/dev/md32 none swap sw,file=swapfile 0 0'"
atf_check -s exit:0 -o match:"swapon: adding /dev/md32 as swap device" -x "swapon -F fstab.out -a"
}
@ -67,7 +73,10 @@ attach_md_head()
attach_md_body()
{
# if the swapfile is too small (like 1k) then mdconfig hangs looking up the md
atf_check -s exit:0 -x "truncate -s 10k swapfile"
# but need a swapfile bigger than one page kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize * 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo 'md none swap sw,file=swapfile 0 0'"
atf_check -s exit:0 -o match:"swapon: adding /dev/md[0-9][0-9]* as swap device" -x "swapon -F fstab.out -a"
}
@ -85,7 +94,10 @@ attach_dev_md_head()
attach_dev_md_body()
{
# if the swapfile is too small (like 1k) then mdconfig hangs looking up the md
atf_check -s exit:0 -x "truncate -s 10k swapfile"
# but need a swapfile bigger than one page kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize * 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo '/dev/md none swap sw,file=swapfile 0 0'"
atf_check -s exit:0 -o match:"swapon: adding /dev/md[0-9][0-9]* as swap device" -x "swapon -F fstab.out -a"
}
@ -103,7 +115,10 @@ attach_mdX_eli_head()
attach_mdX_eli_body()
{
# if the swapfile is too small (like 1k) then mdconfig hangs looking up the md
atf_check -s exit:0 -x "truncate -s 10k swapfile"
# but need a swapfile bigger than one page kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize * 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo 'md33.eli none swap sw,file=swapfile 0 0'"
atf_check -s exit:0 -o match:"swapon: adding /dev/md33.eli as swap device" -x "swapon -F fstab.out -a"
}
@ -121,7 +136,10 @@ attach_dev_mdX_eli_head()
attach_dev_mdX_eli_body()
{
# if the swapfile is too small (like 1k) then mdconfig hangs looking up the md
atf_check -s exit:0 -x "truncate -s 10k swapfile"
# but need a swapfile bigger than one page kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize * 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo '/dev/md34.eli none swap sw,file=swapfile 0 0'"
atf_check -s exit:0 -o match:"swapon: adding /dev/md34.eli as swap device" -x "swapon -F fstab.out -a"
}
@ -139,7 +157,10 @@ attach_md_eli_head()
attach_md_eli_body()
{
# if the swapfile is too small (like 1k) then mdconfig hangs looking up the md
atf_check -s exit:0 -x "truncate -s 10k swapfile"
# but need a swapfile bigger than one page kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize * 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo 'md.eli none swap sw,file=swapfile 0 0'"
atf_check -s exit:0 -o match:"swapon: adding /dev/md[0-9][0-9]*.eli as swap device" -x "swapon -F fstab.out -a"
}
@ -157,7 +178,10 @@ attach_dev_md_eli_head()
attach_dev_md_eli_body()
{
# if the swapfile is too small (like 1k) then mdconfig hangs looking up the md
atf_check -s exit:0 -x "truncate -s 10k swapfile"
# but need a swapfile bigger than one page kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize * 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo '/dev/md.eli none swap sw,file=swapfile 0 0'"
atf_check -s exit:0 -o match:"swapon: adding /dev/md[0-9][0-9]*.eli as swap device" -x "swapon -F fstab.out -a"
}
@ -166,6 +190,24 @@ attach_dev_md_eli_cleanup()
swapoff -F fstab.out -a
}
###
atf_test_case attach_too_small
attach_too_small_head()
{
atf_set "descr" "should refuse to attach if smaller than one kernel page size"
}
attach_too_small_body()
{
# Need to use smaller than kernel page size
pagesize=$(sysctl -n hw.pagesize)
minsize=$(( pagesize / 2 ))
atf_check -s exit:0 -x "truncate -s $minsize swapfile"
atf_check -s exit:0 -o save:fstab.out -x "echo 'md35 none swap sw,file=swapfile 0 0'"
atf_check -s exit:1 -e match:"swapon: /dev/md35: NSWAPDEV limit reached" -x "swapon -F fstab.out -a"
atf_check -s exit:0 -x "mdconfig -d -u 35"
}
###
atf_init_test_cases()
{
@ -178,4 +220,6 @@ atf_init_test_cases()
atf_add_test_case attach_dev_mdX_eli
atf_add_test_case attach_md_eli
atf_add_test_case attach_dev_md_eli
atf_add_test_case attach_too_small
}