c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 02:27:36 +03:00
Code Issues Packages Projects Releases Wiki Activity

Add zpool_events_seek() functionality

Browse Source 
The ZFS_IOC_EVENTS_SEEK ioctl was added to allow user space callers
to seek around the zevent file descriptor by EID.  When a specific
EID is passed and it exists the cursor will be positioned there.
If the EID is no longer cached by the kernel ENOENT is returned.
The caller may also pass ZEVENT_SEEK_START or ZEVENT_SEEK_END to seek
to those respective locations.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Issue #2
This commit is contained in:
Brian Behlendorf
2013-11-22 14:52:16 -08:00
parent a2f1945ee3
commit 75e3ff58fe
7 changed files with 128 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/libzfs/libzfs_pool.c
+36
View File
@@ -3870,6 +3870,42 @@ zpool_events_clear(libzfs_handle_t *hdl, int *count)
return (0);
}
/*
* Seek to a specific EID, ZEVENT_SEEK_START, or ZEVENT_SEEK_END for
* the passed zevent_fd file handle. On success zero is returned,
* otherwise -1 is returned and hdl->libzfs_error is set to the errno.
*/
int
zpool_events_seek(libzfs_handle_t *hdl, uint64_t eid, int zevent_fd)
{
zfs_cmd_t zc = {"\0"};
int error = 0;
zc.zc_guid = eid;
zc.zc_cleanup_fd = zevent_fd;
if (zfs_ioctl(hdl, ZFS_IOC_EVENTS_SEEK, &zc) != 0) {
switch (errno) {
case ENOENT:
error = zfs_error_fmt(hdl, EZFS_NOENT,
dgettext(TEXT_DOMAIN, "cannot get event"));
break;
case ENOMEM:
error = zfs_error_fmt(hdl, EZFS_NOMEM,
dgettext(TEXT_DOMAIN, "cannot get event"));
break;
default:
error = zpool_standard_error_fmt(hdl, errno,
dgettext(TEXT_DOMAIN, "cannot get event"));
break;
}
}
return (error);
}
void
zpool_obj_to_path(zpool_handle_t *zhp, uint64_t dsobj, uint64_t obj,
char *pathname, size_t len)