marko10_000
/
btrfs-progs
forked from Mirrors/btrfs-progs
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

btrfs-progs: Add support for BTRFS_SEND_FLAG_NO_FILE_DATA 

The flag and command are synced from kernel to user. Also, this patch adds a
callback for the BTRFS_SEND_C_UPDATE_EXTENT in struct btrfs_send_ops.
read_and_process_cmd() is updated to decode BTRFS_SEND_C_UPDATE_EXTENT and
send the values through the right callback. I did not add a callback
definition to cmds-receive.c as that code never uses
BTRFS_SEND_FLAG_NO_FILE_DATA.

Signed-off-by: Mark Fasheh <mfasheh@suse.de>
master
Mark Fasheh 2013-01-30 14:50:23 -08:00 committed by David Sterba
parent e43cc46155
commit fac5b559a7
4 changed files with 15 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
ioctl.h
View File

@ -364,6 +364,13 @@ struct btrfs_ioctl_received_subvol_args {
__u64 reserved[16]; /* in */
};
/*
* Caller doesn't want file data in the send stream, even if the
* search of clone sources doesn't find an extent. UPDATE_EXTENT
* commands will be sent instead of WRITE commands.
*/
#define BTRFS_SEND_FLAG_NO_FILE_DATA 0x1
struct btrfs_ioctl_send_args {
__s64 send_fd; /* in */
__u64 clone_sources_count; /* in */

6
send-stream.c
View File

@ -418,6 +418,12 @@ static int read_and_process_cmd(struct btrfs_send_stream *s)
TLV_GET_TIMESPEC(s, BTRFS_SEND_A_CTIME, &ct);
ret = s->ops->utimes(path, &at, &mt, &ct, s->user);
break;
case BTRFS_SEND_C_UPDATE_EXTENT:
TLV_GET_STRING(s, BTRFS_SEND_A_PATH, &path);
TLV_GET_U64(s, BTRFS_SEND_A_FILE_OFFSET, &offset);
TLV_GET_U64(s, BTRFS_SEND_A_SIZE, &tmp);
ret = s->ops->update_extent(path, offset, tmp, s->user);
break;
case BTRFS_SEND_C_END:
ret = 1;
break;

1
send-stream.h
View File

@ -49,6 +49,7 @@ struct btrfs_send_ops {
int (*utimes)(const char *path, struct timespec *at,
struct timespec *mt, struct timespec *ct,
void *user);
int (*update_extent)(const char *path, u64 offset, u64 len, void *user);
};
int btrfs_read_and_process_send_stream(int fd,

1
send.h
View File

@ -86,6 +86,7 @@ enum btrfs_send_cmd {
BTRFS_SEND_C_UTIMES,
BTRFS_SEND_C_END,
BTRFS_SEND_C_UPDATE_EXTENT,
__BTRFS_SEND_C_MAX,
};
#define BTRFS_SEND_C_MAX (__BTRFS_SEND_C_MAX - 1)