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In vfs_nmount(), check to see if "update" mount option was passed

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in, and if so, set MNT_UPDATE filesystem flag.
vfs_nmount() calls vfs_domount(), and there is special logic
inside vfs_domount() if MNT_UPDATE is set.  This is very important
when we want to do an update mount of the root filesystem, using nmount().
This commit is contained in:
Craig Rodrigues 2005-11-18 01:31:10 +00:00
parent e6431fb208
commit 8fd860cfa1
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=152561
1 changed files with 9 additions and 0 deletions
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9
sys/kern/vfs_mount.c
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@ -515,6 +515,15 @@ vfs_donmount(struct thread *td, int fsflags, struct uio *fsoptions)
goto bail;
}
/*
* We need to see if we have the "update" option
* before we call vfs_domount(), since vfs_domount() has special
* logic based on MNT_UPDATE. This is very important
* when we want to update the root filesystem.
*/
if (vfs_getopt(optlist, "update", NULL, NULL) == 0)
fsflags |= MNT_UPDATE;
/*
* Be ultra-paranoid about making sure the type and fspath
* variables will fit in our mp buffers, including the