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Add an option to suppress the creation of the .snap directory in

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the new filesystem.  This is intended for memory and vnode filesystems
that will never be fsck'ed or dumped.

Obtained from:	St. Bernard Software RAPID
MFC after:	2 weeks
This commit is contained in:
Wes Peters 2005-01-21 22:20:25 +00:00
parent 73e31afa1a
commit 34b59b6bf2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=140603
4 changed files with 60 additions and 32 deletions
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68
sbin/newfs/mkfs.c
View File

@ -738,10 +738,12 @@ fsinit(time_t utime)
{
union dinode node;
struct group *grp;
int entries;
memset(&node, 0, sizeof node);
if ((grp = getgrnam("operator")) == NULL)
errx(35, "Cannot retrieve operator gid");
entries = (nflag) ? ROOTLINKCNT - 1: ROOTLINKCNT;
if (sblock.fs_magic == FS_UFS1_MAGIC) {
/*
* initialize the node
@ -753,27 +755,30 @@ fsinit(time_t utime)
* create the root directory
*/
node.dp1.di_mode = IFDIR | UMASK;
node.dp1.di_nlink = ROOTLINKCNT;
node.dp1.di_size = makedir(root_dir, ROOTLINKCNT);
node.dp1.di_nlink = entries;
node.dp1.di_size = makedir(root_dir, entries);
node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode);
node.dp1.di_blocks =
btodb(fragroundup(&sblock, node.dp1.di_size));
wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize,
iobuf);
iput(&node, ROOTINO);
/*
* create the .snap directory
*/
node.dp1.di_mode |= 020;
node.dp1.di_gid = grp->gr_gid;
node.dp1.di_nlink = SNAPLINKCNT;
node.dp1.di_size = makedir(snap_dir, SNAPLINKCNT);
node.dp1.di_db[0] = alloc(sblock.fs_fsize, node.dp1.di_mode);
node.dp1.di_blocks =
btodb(fragroundup(&sblock, node.dp1.di_size));
wtfs(fsbtodb(&sblock, node.dp1.di_db[0]), sblock.fs_fsize,
iobuf);
iput(&node, ROOTINO + 1);
if (!nflag) {
/*
* create the .snap directory
*/
node.dp1.di_mode |= 020;
node.dp1.di_gid = grp->gr_gid;
node.dp1.di_nlink = SNAPLINKCNT;
node.dp1.di_size = makedir(snap_dir, SNAPLINKCNT);
node.dp1.di_db[0] =
alloc(sblock.fs_fsize, node.dp1.di_mode);
node.dp1.di_blocks =
btodb(fragroundup(&sblock, node.dp1.di_size));
wtfs(fsbtodb(&sblock, node.dp1.di_db[0]),
sblock.fs_fsize, iobuf);
iput(&node, ROOTINO + 1);
}
} else {
/*
* initialize the node
@ -786,27 +791,30 @@ fsinit(time_t utime)
* create the root directory
*/
node.dp2.di_mode = IFDIR | UMASK;
node.dp2.di_nlink = ROOTLINKCNT;
node.dp2.di_size = makedir(root_dir, ROOTLINKCNT);
node.dp2.di_nlink = entries;
node.dp2.di_size = makedir(root_dir, entries);
node.dp2.di_db[0] = alloc(sblock.fs_fsize, node.dp2.di_mode);
node.dp2.di_blocks =
btodb(fragroundup(&sblock, node.dp2.di_size));
wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), sblock.fs_fsize,
iobuf);
iput(&node, ROOTINO);
/*
* create the .snap directory
*/
node.dp2.di_mode |= 020;
node.dp2.di_gid = grp->gr_gid;
node.dp2.di_nlink = SNAPLINKCNT;
node.dp2.di_size = makedir(snap_dir, SNAPLINKCNT);
node.dp2.di_db[0] = alloc(sblock.fs_fsize, node.dp2.di_mode);
node.dp2.di_blocks =
btodb(fragroundup(&sblock, node.dp2.di_size));
wtfs(fsbtodb(&sblock, node.dp2.di_db[0]), sblock.fs_fsize,
iobuf);
iput(&node, ROOTINO + 1);
if (!nflag) {
/*
* create the .snap directory
*/
node.dp2.di_mode |= 020;
node.dp2.di_gid = grp->gr_gid;
node.dp2.di_nlink = SNAPLINKCNT;
node.dp2.di_size = makedir(snap_dir, SNAPLINKCNT);
node.dp2.di_db[0] =
alloc(sblock.fs_fsize, node.dp2.di_mode);
node.dp2.di_blocks =
btodb(fragroundup(&sblock, node.dp2.di_size));
wtfs(fsbtodb(&sblock, node.dp2.di_db[0]),
sblock.fs_fsize, iobuf);
iput(&node, ROOTINO + 1);
}
}
}

17
sbin/newfs/newfs.8
View File

@ -36,7 +36,7 @@
.Nd construct a new UFS1/UFS2 file system
.Sh SYNOPSIS
.Nm
.Op Fl NUl
.Op Fl NUln
.Op Fl L Ar volname
.Op Fl O Ar filesystem-type
.Op Fl S Ar sector-size
@ -159,6 +159,20 @@ currently 8%.
See
.Xr tunefs 8
for more details on how to set this option.
.It Fl n
Do not create a .snap directory on the new filesystem.
The resulting filesystem will not support snapshot generation, so
.Xr dump 8
in live mode and background
.Xr fsck 8
will not function properly.
The traditional
.Xr fsck 8
and offline
.Xr dump 8
will work on the filesystem.
This option is intended primarily for memory or vnode filesystems that
do not require dump or fsck support.
.It Fl o Ar optimization
.Cm ( space
or
@ -219,6 +233,7 @@ on file systems that contain many small files.
.Xr fs 5 ,
.Xr bsdlabel 8 ,
.Xr camcontrol 8 ,
.Xr dump 8 ,
.Xr dumpfs 8 ,
.Xr fsck 8 ,
.Xr mount 8 ,

6
sbin/newfs/newfs.c
View File

@ -118,6 +118,7 @@ int Rflag; /* regression test */
int Uflag; /* enable soft updates for file system */
int Eflag = 0; /* exit in middle of newfs for testing */
int lflag; /* enable multilabel for file system */
int nflag; /* do not create .snap directory */
quad_t fssize; /* file system size */
int sectorsize; /* bytes/sector */
int realsectorsize; /* bytes/sector in hardware */
@ -155,7 +156,7 @@ main(int argc, char *argv[])
off_t mediasize;
while ((ch = getopt(argc, argv,
"EL:NO:RS:T:Ua:b:c:d:e:f:g:h:i:lm:o:s:")) != -1)
"EL:NO:RS:T:Ua:b:c:d:e:f:g:h:i:lm:no:s:")) != -1)
switch (ch) {
case 'E':
Eflag++;
@ -244,6 +245,9 @@ main(int argc, char *argv[])
if ((minfree = atoi(optarg)) < 0 || minfree > 99)
errx(1, "%s: bad free space %%", optarg);
break;
case 'n':
nflag = 1;
break;
case 'o':
if (strcmp(optarg, "space") == 0)
opt = FS_OPTSPACE;

1
sbin/newfs/newfs.h
View File

@ -50,6 +50,7 @@ extern int Rflag; /* regression test */
extern int Uflag; /* enable soft updates for file system */
extern int Eflag; /* exit as if error, for testing */
extern int lflag; /* enable multilabel MAC for file system */
extern int nflag; /* do not create .snap directory */
extern quad_t fssize; /* file system size */
extern int sectorsize; /* bytes/sector */
extern int realsectorsize; /* bytes/sector in hardware*/