Dirk Mueller
a0e284e535
- add scrub subcommand - scan /proc/partitions by default (or use --all-devices for all) - mkfs fixes and improvements - documentation fixes - update from git: - add btrfs-select-super utility - add btrfs-label utility - allow mixed data+metadata (option --mixed) - allow populating new filesystem with files (option --rootdir) - allow discard support in mkfs - lzo support - deprecate 'btrfsctl' 'btrfs-vol' 'btrfs-show' - other bugfixes and documentation improvements OBS-URL: https://build.opensuse.org/package/show/filesystems/btrfsprogs?expand=0&rev=104
96 lines
2.5 KiB
Diff
96 lines
2.5 KiB
Diff
From fd296ee4952a542d18ed1bfe4adbf247474f7d21 Mon Sep 17 00:00:00 2001
|
|
From: Andreas Philipp <philipp.andreas@gmail.com>
|
|
Date: Tue, 26 Apr 2011 10:02:41 +0200
|
|
Subject: [PATCH 09/28] Add support for read-only subvolumes.
|
|
|
|
Use BTRFS_IOC_CREATE_SNAP_V2 instead of BTRFS_IOC_CREATE_SNAP and add
|
|
an option for the creation of a readonly snapshot.
|
|
|
|
Signed-off-by: Andreas Philipp <philipp.andreas@gmail.com>
|
|
Signed-off-by: Hugo Mills <hugo@carfax.org.uk>
|
|
---
|
|
btrfs_cmds.c | 48 ++++++++++++++++++++++++++++++++++++++++--------
|
|
1 files changed, 40 insertions(+), 8 deletions(-)
|
|
|
|
diff --git a/btrfs_cmds.c b/btrfs_cmds.c
|
|
index 32f6b25..505322d 100644
|
|
--- a/btrfs_cmds.c
|
|
+++ b/btrfs_cmds.c
|
|
@@ -44,7 +44,7 @@
|
|
|
|
#ifdef __CHECKER__
|
|
#define BLKGETSIZE64 0
|
|
-#define BTRFS_IOC_SNAP_CREATE 0
|
|
+#define BTRFS_IOC_SNAP_CREATE_V2 0
|
|
#define BTRFS_VOL_NAME_MAX 255
|
|
struct btrfs_ioctl_vol_args { char name[BTRFS_VOL_NAME_MAX]; };
|
|
static inline int ioctl(int fd, int define, void *arg) { return 0; }
|
|
@@ -330,13 +330,38 @@ int do_subvol_list(int argc, char **argv)
|
|
int do_clone(int argc, char **argv)
|
|
{
|
|
char *subvol, *dst;
|
|
- int res, fd, fddst, len, e;
|
|
+ int res, fd, fddst, len, e, optind = 0, readonly = 0;
|
|
char *newname;
|
|
char *dstdir;
|
|
+ struct btrfs_ioctl_vol_args_v2 args;
|
|
|
|
- subvol = argv[1];
|
|
- dst = argv[2];
|
|
- struct btrfs_ioctl_vol_args args;
|
|
+ memset(&args, 0, sizeof(args));
|
|
+
|
|
+ while (1) {
|
|
+ int c = getopt(argc, argv, "r");
|
|
+
|
|
+ if (c < 0)
|
|
+ break;
|
|
+ switch (c) {
|
|
+ case 'r':
|
|
+ optind++;
|
|
+ readonly = 1;
|
|
+ break;
|
|
+ default:
|
|
+ fprintf(stderr,
|
|
+ "Invalid arguments for subvolume snapshot\n");
|
|
+ free(argv);
|
|
+ return 1;
|
|
+ }
|
|
+ }
|
|
+ if (argc - optind < 2) {
|
|
+ fprintf(stderr, "Invalid arguments for subvolume snapshot\n");
|
|
+ free(argv);
|
|
+ return 1;
|
|
+ }
|
|
+
|
|
+ subvol = argv[optind+1];
|
|
+ dst = argv[optind+2];
|
|
|
|
res = test_issubvolume(subvol);
|
|
if(res<0){
|
|
@@ -392,11 +417,18 @@ int do_clone(int argc, char **argv)
|
|
return 12;
|
|
}
|
|
|
|
- printf("Create a snapshot of '%s' in '%s/%s'\n",
|
|
- subvol, dstdir, newname);
|
|
+ if (readonly) {
|
|
+ args.flags |= BTRFS_SUBVOL_RDONLY;
|
|
+ printf("Create a readonly snapshot of '%s' in '%s/%s'\n",
|
|
+ subvol, dstdir, newname);
|
|
+ } else {
|
|
+ printf("Create a snapshot of '%s' in '%s/%s'\n",
|
|
+ subvol, dstdir, newname);
|
|
+ }
|
|
+
|
|
args.fd = fd;
|
|
strncpy(args.name, newname, BTRFS_PATH_NAME_MAX);
|
|
- res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE, &args);
|
|
+ res = ioctl(fddst, BTRFS_IOC_SNAP_CREATE_V2, &args);
|
|
e = errno;
|
|
|
|
close(fd);
|
|
--
|
|
1.7.5.2.353.g5df3e
|
|
|