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Message-ID: <20250819061254.31220-2-bagasdotme@gmail.com> Date: Tue, 19 Aug 2025 13:12:49 +0700 From: Bagas Sanjaya <bagasdotme@...il.com> To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, Linux Documentation <linux-doc@...r.kernel.org>, Linux Filesystems Development <linux-fsdevel@...r.kernel.org> Cc: Jonathan Corbet <corbet@....net>, Bagas Sanjaya <bagasdotme@...il.com>, Christian Brauner <brauner@...nel.org>, Mauro Carvalho Chehab <mchehab+huawei@...nel.org>, Randy Dunlap <rdunlap@...radead.org> Subject: [PATCH 1/5] Documentation: sharedsubtree: Format remaining of shell snippets as literal code blcoks Fix formatting inconsistency of shell snippets by wrapping the remaining of them in literal code blocks. Signed-off-by: Bagas Sanjaya <bagasdotme@...il.com> --- Documentation/filesystems/sharedsubtree.rst | 68 +++++++++++---------- 1 file changed, 37 insertions(+), 31 deletions(-) diff --git a/Documentation/filesystems/sharedsubtree.rst b/Documentation/filesystems/sharedsubtree.rst index 1cf56489ed484d..06497c4455b41d 100644 --- a/Documentation/filesystems/sharedsubtree.rst +++ b/Documentation/filesystems/sharedsubtree.rst @@ -90,37 +90,42 @@ replicas continue to be exactly same. Here is an example: - Let's say /mnt has a mount which is shared. - # mount --make-shared /mnt + Let's say /mnt has a mount which is shared:: - Let's bind mount /mnt to /tmp - # mount --bind /mnt /tmp + # mount --make-shared /mnt + + Let's bind mount /mnt to /tmp:: + + # mount --bind /mnt /tmp the new mount at /tmp becomes a shared mount and it is a replica of the mount at /mnt. - Now let's make the mount at /tmp; a slave of /mnt - # mount --make-slave /tmp + Now let's make the mount at /tmp; a slave of /mnt:: - let's mount /dev/sd0 on /mnt/a - # mount /dev/sd0 /mnt/a + # mount --make-slave /tmp - #ls /mnt/a - t1 t2 t3 + let's mount /dev/sd0 on /mnt/a:: - #ls /tmp/a - t1 t2 t3 + # mount /dev/sd0 /mnt/a + + # ls /mnt/a + t1 t2 t3 + + # ls /tmp/a + t1 t2 t3 Note the mount event has propagated to the mount at /tmp - However let's see what happens if we mount something on the mount at /tmp + However let's see what happens if we mount something on the mount at + /tmp:: - # mount /dev/sd1 /tmp/b + # mount /dev/sd1 /tmp/b - #ls /tmp/b - s1 s2 s3 + # ls /tmp/b + s1 s2 s3 - #ls /mnt/b + # ls /mnt/b Note how the mount event has not propagated to the mount at /mnt @@ -137,7 +142,7 @@ replicas continue to be exactly same. # mount --make-unbindable /mnt - Let's try to bind mount this mount somewhere else:: + Let's try to bind mount this mount somewhere else:: # mount --bind /mnt /tmp mount: wrong fs type, bad option, bad superblock on /mnt, @@ -471,9 +476,9 @@ replicas continue to be exactly same. 5d) Move semantics - Consider the following command + Consider the following command:: - mount --move A B/b + mount --move A B/b where 'A' is the source mount, 'B' is the destination mount and 'b' is the dentry in the destination mount. @@ -663,9 +668,9 @@ replicas continue to be exactly same. 'B' is the slave of 'A' and 'C' is a slave of 'B' A -> B -> C - at this point if we execute the following command + at this point if we execute the following command:: - mount --bind /bin /tmp/test + mount --bind /bin /tmp/test The mount is attempted on 'A' @@ -706,8 +711,8 @@ replicas continue to be exactly same. / \ tmp usr - And we want to replicate the tree at multiple - mountpoints under /root/tmp + And we want to replicate the tree at multiple + mountpoints under /root/tmp step 2: :: @@ -731,7 +736,7 @@ replicas continue to be exactly same. / m1 - it has two vfsmounts + it has two vfsmounts step 3: :: @@ -739,7 +744,7 @@ replicas continue to be exactly same. mkdir -p /tmp/m2 mount --rbind /root /tmp/m2 - the new tree now looks like this:: + the new tree now looks like this:: root / \ @@ -759,14 +764,15 @@ replicas continue to be exactly same. / \ m1 m2 - it has 6 vfsmounts + it has 6 vfsmounts step 4: - :: + :: + mkdir -p /tmp/m3 mount --rbind /root /tmp/m3 - I won't draw the tree..but it has 24 vfsmounts + I won't draw the tree..but it has 24 vfsmounts at step i the number of vfsmounts is V[i] = i*V[i-1]. @@ -785,8 +791,8 @@ replicas continue to be exactly same. / \ tmp usr - How do we set up the same tree at multiple locations under - /root/tmp + How do we set up the same tree at multiple locations under + /root/tmp step 2: :: -- An old man doll... just what I always wanted! - Clara
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