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mkfs: add 'label' optional argument

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Add the 'label' optional argument to the mkfs action, so it is possible
to set a filesystem label direct when creating it. There may be
filesystems not supporting changing the label of existing filesystems
but only setting it at creation time, so this new optarg will help.

Implement it for the most common filesystems (ext*, fat, ntfs, btrfs,
xfs), giving an error for all the others, just like set_label does.
This commit is contained in:
Pino Toscano
2015-01-09 18:56:28 +01:00
parent 19c09bcdee
commit 7723614a91
2 changed files with 66 additions and 21 deletions
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45
daemon/mkfs.c
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@@ -36,7 +36,7 @@ GUESTFSD_EXT_CMD(str_mkfs, mkfs);
/* Takes optional arguments, consult optargs_bitmask. */
int
do_mkfs (const char *fstype, const char *device, int blocksize,
const char *features, int inode, int sectorsize)
const char *features, int inode, int sectorsize, const char *label)
{
const char *argv[MAX_ARGS];
size_t i = 0;
@@ -194,6 +194,47 @@ do_mkfs (const char *fstype, const char *device, int blocksize,
ADD_ARG (argv, i, sectorsize_str);
}
if (optargs_bitmask & GUESTFS_MKFS_LABEL_BITMASK) {
if (extfs) {
if (strlen (label) > EXT2_LABEL_MAX) {
reply_with_error ("%s: ext2 labels are limited to %d bytes",
label, EXT2_LABEL_MAX);
return -1;
}
ADD_ARG (argv, i, "-L");
ADD_ARG (argv, i, label);
}
else if (STREQ (fstype, "fat") || STREQ (fstype, "vfat") ||
STREQ (fstype, "msdos")) {
ADD_ARG (argv, i, "-n");
ADD_ARG (argv, i, label);
}
else if (STREQ (fstype, "ntfs")) {
ADD_ARG (argv, i, "-L");
ADD_ARG (argv, i, label);
}
else if (STREQ (fstype, "xfs")) {
if (strlen (label) > XFS_LABEL_MAX) {
reply_with_error ("%s: xfs labels are limited to %d bytes",
label, XFS_LABEL_MAX);
return -1;
}
ADD_ARG (argv, i, "-L");
ADD_ARG (argv, i, label);
}
else if (STREQ (fstype, "btrfs")) {
ADD_ARG (argv, i, "-L");
ADD_ARG (argv, i, label);
}
else {
reply_with_error ("don't know how to set the label for '%s' filesystems",
fstype);
return -1;
}
}
ADD_ARG (argv, i, device);
ADD_ARG (argv, i, NULL);
@@ -212,5 +253,5 @@ int
do_mkfs_b (const char *fstype, int blocksize, const char *device)
{
optargs_bitmask = GUESTFS_MKFS_BLOCKSIZE_BITMASK;
return do_mkfs (fstype, device, blocksize, 0, 0, 0);
return do_mkfs (fstype, device, blocksize, 0, 0, 0, NULL);
}