/* ARGSUSED */ static int zfsctl_snapdir_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, caller_context_t *cc, int flags, vsecattr_t *vsecp) { zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data; char name[MAXNAMELEN]; int err; static enum symfollow follow = NO_FOLLOW; static enum uio_seg seg = UIO_SYSSPACE; if (snapshot_namecheck(dirname, NULL, NULL) != 0) return (EILSEQ); dmu_objset_name(zfsvfs->z_os, name); *vpp = NULL; err = zfs_secpolicy_snapshot_perms(name, cr); if (err) return (err); if (err == 0) { err = dmu_objset_snapshot(name, dirname, NULL, B_FALSE); if (err) return (err); err = lookupnameat(dirname, seg, follow, NULL, vpp, dvp); } return (err); }
/* ARGSUSED */ int zfsctl_snapdir_mkdir(struct inode *dip, char *dirname, vattr_t *vap, struct inode **ipp, cred_t *cr, int flags) { zfs_sb_t *zsb = ITOZSB(dip); char *dsname; int error; dsname = kmem_alloc(MAXNAMELEN, KM_SLEEP); if (snapshot_namecheck(dirname, NULL, NULL) != 0) { error = EILSEQ; goto out; } dmu_objset_name(zsb->z_os, dsname); error = zfs_secpolicy_snapshot_perms(dsname, cr); if (error) goto out; if (error == 0) { error = dmu_objset_snapshot(dsname, dirname, NULL, NULL, B_FALSE, B_FALSE, -1); if (error) goto out; error = zfsctl_snapdir_lookup(dip, dirname, ipp, 0, cr, NULL, NULL); } out: kmem_free(dsname, MAXNAMELEN); return (error); }
static int dmu_objset_snapshot_one(char *name, void *arg) { struct snaparg *sn = arg; objset_t *os; int err; (void) strcpy(sn->failed, name); /* * Check permissions only when requested. This only applies when * doing a recursive snapshot. The permission checks for the starting * dataset have already been performed in zfs_secpolicy_snapshot() */ if (sn->checkperms == B_TRUE && (err = zfs_secpolicy_snapshot_perms(name, CRED()))) return (err); err = dmu_objset_open(name, DMU_OST_ANY, DS_MODE_USER, &os); if (err != 0) return (err); /* If the objset is in an inconsistent state, return busy */ if (os->os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) { dmu_objset_close(os); return (EBUSY); } /* * NB: we need to wait for all in-flight changes to get to disk, * so that we snapshot those changes. zil_suspend does this as * a side effect. */ err = zil_suspend(dmu_objset_zil(os)); if (err == 0) { struct osnode *osn; dsl_sync_task_create(sn->dstg, dsl_dataset_snapshot_check, dsl_dataset_snapshot_sync, os->os->os_dsl_dataset, sn->snapname, 3); osn = kmem_alloc(sizeof (struct osnode), KM_SLEEP); osn->os = os; list_insert_tail(&sn->objsets, osn); } else { dmu_objset_close(os); } return (err); }