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| author | mckusick <mckusick@FreeBSD.org> | 2000-07-26 23:07:01 +0000 |
|---|---|---|
| committer | mckusick <mckusick@FreeBSD.org> | 2000-07-26 23:07:01 +0000 |
| commit | b86877bef05dab48d7c3a733431361260c18fa81 (patch) | |
| tree | 30ca740a52fe6adb75f12ae761ec884d3c05e7c4 /sys/ufs/ffs/ffs_inode.c | |
| parent | 97118d11db99484338915c391830f5e9ad423dc2 (diff) | |
| download | FreeBSD-src-b86877bef05dab48d7c3a733431361260c18fa81.zip FreeBSD-src-b86877bef05dab48d7c3a733431361260c18fa81.tar.gz | |
Clean up the snapshot code so that it no longer depends on the use of
the SF_IMMUTABLE flag to prevent writing. Instead put in explicit
checking for the SF_SNAPSHOT flag in the appropriate places. With
this change, it is now possible to rename and link to snapshot files.
It is also possible to set or clear any of the owner, group, or
other read bits on the file, though none of the write or execute
bits can be set. There is also an explicit test to prevent the
setting or clearing of the SF_SNAPSHOT flag via chflags() or
fchflags(). Note also that the modify time cannot be changed as
it needs to accurately reflect the time that the snapshot was taken.
Submitted by: Robert Watson <rwatson@FreeBSD.org>
Diffstat (limited to 'sys/ufs/ffs/ffs_inode.c')
| -rw-r--r-- | sys/ufs/ffs/ffs_inode.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/ufs/ffs/ffs_inode.c b/sys/ufs/ffs/ffs_inode.c index 4725090..30f36ee7 100644 --- a/sys/ufs/ffs/ffs_inode.c +++ b/sys/ufs/ffs/ffs_inode.c @@ -45,6 +45,7 @@ #include <sys/vnode.h> #include <sys/malloc.h> #include <sys/resourcevar.h> +#include <sys/stat.h> #include <vm/vm.h> #include <vm/vm_extern.h> @@ -174,6 +175,8 @@ ffs_truncate(vp, length, flags, cred, p) if (error) return (error); #endif + if ((oip->i_flags & SF_SNAPSHOT) != 0) + ffs_snapremove(ovp); ovp->v_lasta = ovp->v_clen = ovp->v_cstart = ovp->v_lastw = 0; if (DOINGSOFTDEP(ovp)) { if (length > 0) { |
